Battery component holder for receiving at least one battery component, battery housing for receiving a plurality of battery components, battery having a battery housing, and motor vehicle having a battery

Abstract

The invention relates to a battery component holder (1) for receiving at least one battery component (2), the battery component holder having a first battery component holder part (3) and a second battery component holder part (3), wherein the first battery component holder part (3) and the second battery component holder part (3) are arranged adjacent to one another such that a first receiving device (4) of the first battery component holder part (3) and a second receiving device (4) of the second battery component holder part (3) together at least partially delimit a receiving volume (5) for receiving at least one battery component (2), wherein the battery component holder (1) is characterized by the following feature: the battery component holder (1) has a heat transfer device (6) which is arranged in the receiving volume (5) between the first battery component holder part (3) and the second battery component holder part (3) such that a heat transfer surface (7) of the heat transfer device (6) at least partially delimits a receiving space (8) for receiving at least one battery component (2).

Description

[0001] Applicant: KAUTEX TEXTRON GmbH & Co. KG

[0002] Battery component holder for holding at least one battery component, battery housing for holding a plurality of battery components, battery with a battery housing and motor vehicle with a battery

[0003] The present invention relates to a battery component holder for receiving at least one battery component. Furthermore, the present invention relates to a battery housing for receiving a plurality of battery components. The present invention also relates to a battery with a battery housing and a motor vehicle with a battery.

[0004] New generation batteries, especially traction batteries for motor vehicles, are often built according to the "cell-to-pack" principle to increase energy density. This means that the battery cells are not installed in individual battery modules within the battery housing. Instead, the battery cells are integrated directly into the battery housing. This is typically achieved by bonding the battery cells across their entire surface or by completely embedding them in potting compounds. Medium-density polyurethane foams are typically used as potting compounds, bonding to the battery cells and the battery housing through adhesion. The potting compound acts as an electrical and thermal insulator between the battery cells and ensures sufficient torsional and flexural rigidity of the battery.This allows the battery to be smaller than a conventional battery with battery modules for a given capacity.

[0005] These batteries, however, have the disadvantage that a technologically difficult-to-control and slow process of potting and curing the potting compound is required. This can lead to potting compound getting into unintended areas within the battery casing. Furthermore, these batteries have the problem that the potting compound does not completely fill the areas within the battery casing intended for filling, which can potentially impair the battery's mechanical and thermal performance. Additionally, the cured potting compound can have an inhomogeneously distributed density.

[0006] A major disadvantage is the poor recyclability of the battery casing, which is primarily due to the complex separation of its materials. These disadvantages are particularly pronounced in battery casings made of plastic or fiber-reinforced plastic. The plastic surfaces of the battery casing require extensive pretreatment to achieve sufficient adhesion between the potting compound and the casing. Furthermore, the subsequent separation of the potting compound from a plastic or fiber-reinforced plastic battery casing during recycling is even more difficult than with a metal battery casing.

[0007] Furthermore, batteries, especially traction batteries for motor vehicles, handle high power levels during charging and discharging. Such traction batteries can already be operated at voltages of several hundred volts. Additionally, charging and discharging currents of several hundred amperes are already possible. The power requirements for such traction batteries will increase even further in the future. These high power consumptions lead to high, and in the future even higher, thermal losses in the traction battery during charging and discharging processes. To protect the traction batteries from thermal damage and to achieve high efficiency during charging and discharging, it is important to keep the traction batteries within a defined temperature range. For this, the traction battery must be cooled by dissipating the heat generated by thermal losses.

[0008] Therefore, liquid cooling can be implemented, for example, using a heat transfer device through which a liquid heat transfer medium or coolant flows. The heat transfer device is usually located on the battery components or battery cells, and is thermally connected to them via a contact heat transfer. The sensitive heat capacity of the liquid heat transfer medium, such as a refrigerant, is used to absorb heat emitted by the battery components or the respective traction battery across a temperature difference and dissipate it either directly to the environment or via a cooling circuit. Electrically conductive liquids or liquid mixtures are typically used as the heat transfer medium.In the aforementioned existing cell-to-pack solutions, heat transfer devices are typically bonded to the battery components using an adhesive and thermally conductive layer to ensure that the heat transfer device remains in contact with the battery components even after the potting compound has been poured and cured, thus enabling effective heat dissipation.

[0009] A disadvantage of these batteries is that an additional adhesive layer must be applied to the heat transfer devices or to the battery components, which on the one hand results in a costly and complex manufacturing process and on the other hand impairs the recyclability of the battery.

[0010] The present invention is therefore based on the objective of overcoming the aforementioned disadvantages and enabling a battery which offers improved recyclability, improved cooling of battery components, and a simplified manufacturing process.

[0011] The problems addressed by the present invention are solved by a battery component holder having the features of claim 1 of the present invention. Advantageous embodiments are described in the dependent claims.

[0012] More precisely, the problem underlying the present invention is solved by a battery component holder for receiving at least one battery component, comprising a first battery component holder part and a second battery component holder part. The first battery component holder part and the second battery component holder part are arranged adjacent to each other such that a first receiving device of the first battery component holder part and a second receiving device of the second battery component holder part together at least partially define a receiving volume for receiving at least one battery component.The battery component holder has a heat transfer device which is arranged in the receiving volume between the first battery component holder part and the second battery component holder part such that a heat transfer surface of the heat transfer device at least partially limits a receiving space for receiving at least one battery component.

[0013] A battery component holder according to the invention has the advantage that battery components, in particular battery cells, with a cell-to-pack format can be installed directly into a battery housing without gluing the battery components or embedding them in a potting compound. In this respect, the resulting battery has improved recyclability. Because a complex potting compound is not required in the battery housing, recycling of the battery is possible without complex separation processes for separating the potting compound from the battery housing components. Furthermore, the battery component holder according to the invention enables reliable contact between battery components and the heat transfer device, thus allowing for improved temperature control of the battery components.

[0014] Furthermore, the battery component holder according to the invention has the advantage that an adhesive layer between the heat transfer devices and the battery components or battery cells can be dispensed with. This enables a simplified manufacturing process and also further improves the recyclability of the battery.

[0015] Finally, the battery component holder according to the invention has the advantage that flexible heat transfer devices can now also be used as heat transfer elements. Due to the arrangement of the heat transfer devices in the receiving volume between the first battery component holder part and the second battery component holder part, the heat transfer device is not exposed to external forces, for example, induced by a potting compound. Therefore, a flexible heat transfer device cannot be affected by such forces, for example, by being squeezed. This enables the use of a flexible heat transfer device.

[0016] A battery component can, for example, be designed as a battery cell. In particular, a battery component can be designed as a cylindrical battery cell. Other designs, such as prismatic ones, are also possible. A large number of battery cells can be connected together to form a battery module. Several battery cells or several battery modules can form a battery or traction battery. A battery cell, a battery module, and / or a battery can also be arranged in a battery housing.

[0017] A battery component holder can, for example, be prismatic with two main faces and four end faces separating the two main faces. A main face can also be referred to as a side of the battery component holder. A battery component holder can be essentially solid or designed as a frame. The contour of the main faces can be flat or curved and thus, for example, have recesses. A battery component holder can, for example, be divided centrally along an elongated end face into two battery component holder parts. Other divisions of a battery component holder into its battery component holder parts are also possible. A battery component holder part can also be prismatic with two main faces and four end faces separating the two main faces.A battery component holder part can, for example, be essentially solid or designed as a frame. Two battery component holder parts can together form a prismatic battery component holder; however, other combinations are also possible. For example, two or more pairs of battery component holder parts can also form a battery component holder.

[0018] Two battery component holders or two battery component holder parts are considered adjacent, for example, if they are arranged next to each other with one of their main surfaces being essentially congruent. In this respect, the wavy end faces of the battery component holder parts can, for example, each be arranged in the same plane. The corresponding main surfaces can, for example, be in contact or only slightly separated from each other.

[0019] A receiving device of a battery component holder part can, for example, be designed as a recess in that battery component holder part. A recess can thus be a cutout from an imaginary or actual prismatic base shape of the battery component holder part. In particular, a recess can have a round or semicircular profile. A receiving device can also be arranged to project from an imaginary or actual prismatic base shape of the battery component holder part. Preferably, a plurality of receiving devices can be arranged adjacent to one another in a battery component holder part. In this respect, a receiving device can have receiving surfaces that also at least partially define a receiving space for battery components.

[0020] In an adjacent arrangement of a first battery component holder part and a second battery component holder part, at least a first receiving device of the first battery component holder part and a second receiving device of the second battery component holder part jointly define a receiving volume for receiving at least one battery component, at least partially. In this respect, for example, the at least two receiving devices associated with each other and defining a receiving volume, each of which at least partially defines a receiving volume, can each be designed as a recess with a semicircular profile in their respective battery component holder part. When these two battery component holder parts are arranged adjacently, these two receiving devices form a receiving volume with a substantially circular profile.Preferably, each battery component holder part can have a plurality of adjacent receiving devices arranged side by side, each of which, together with a receiving device of the adjacent battery component holder part, defines a receiving volume of this type. Two receiving devices associated with each other can also only partially define the receiving volume. For example, a common receiving volume of several receiving devices can be defined. A receiving device or a pair of receiving devices associated with each other can define the receiving volume, in particular, at the main surfaces of the battery component holder parts and therefore not at the end faces.In other words, a battery component holder composed of two such battery component holder parts can have one or more receiving volumes that are open "upwards", i.e. in the direction of one or more end faces.

[0021] A heat transfer device is understood to be a device designed to transfer heat from one medium to another, whereby the two media never come into contact with each other. In this respect, a heat transfer device can also be referred to as a heat exchanger. A heat transfer device can be rigid or flexible. A heat transfer device can be designed to be flooded with a refrigerant or coolant. For example, such a refrigerant can include water, R134a, hydrofluorocarbons, hydrofluoroolefins, or carbon dioxide. A heat transfer device can therefore include at least one coolant channel. A coolant channel can preferably be planar, so that the largest possible surface area is available for contact with the battery component to be cooled.Such a surface can also be referred to as a heat transfer surface. A heat transfer surface of a heat transfer device can, in particular, be positioned on a battery component. A heat transfer device can also comprise several coolant channels. It is also possible for a heat transfer device to be detachably arranged on one or more battery component holder parts. Such a heat transfer device is thus connectable to the battery component holder or battery component holder part. A heat transfer device can, for example, comprise plastic.

[0022] A heat transfer device can, for example, be arranged at least partially on one or more receiving devices. In this respect, a heat transfer device can be arranged at least partially within a receiving volume and thus on a battery component holder. Here, a heat transfer surface within a receiving volume can at least partially define a receiving space for a battery component. For example, in a receiving device designed as a recess, a heat transfer device can be arranged within this recess, with at least one of its heat transfer surfaces defining a receiving space. In other words, this heat transfer surface can be directed into the "cavity" of the receiving volume. A battery component can be arranged on this heat transfer surface to provide the largest possible surface area for heat transfer.

[0023] In this respect, a receiving space can be understood as a cavity, at least partially bounded by a heat transfer device, in particular by a heat transfer surface of a heat transfer device, for receiving a battery component. A receiving space can further be designed such that a battery component, for example a cylindrical battery cell, can be received in the receiving space in a form-fitting and / or force-fit manner. For example, the receiving space can comprise one or more chambers with a round profile in which cylindrical battery cells can be received. In particular, the outer surfaces of such cylindrical battery cells can abut the heat transfer surfaces that bound the receiving space.

[0024] The first receiving device and / or the second receiving device may have an inner contour for receiving a heat transfer device and at least one heat transfer device may be at least partially adjacent to or arranged in an inner contour.

[0025] A receiving device or battery component holder designed in this way has the particular advantage that a heat transfer device can be arranged stress-free in a receiving device and is therefore protected from shear forces acting on the battery component holder.

[0026] An internal contour can, for example, be designed as a recess within a receiving device. For instance, a receiving direction can have a receiving surface that at least partially defines a receiving space. A recess, which can be referred to as an internal contour, can be provided in such a receiving surface. Such a recess can, for example, be designed in such a way that a heat transfer device can be arranged on or accommodated within this internal contour. An internal contour can, for example, be arranged relative to a receiving surface in such a way that a heat transfer device resting against the internal contour, particularly with its heat transfer surface, is flush with the receiving surface.It is also possible that a heat transfer device located against the inner contour may protrude slightly with its heat transfer surface compared to the receiving surface.

[0027] It is also possible for an inner contour to be designed as a recess within a receiving device. In such a design, a heat transfer device does not rest against an inner contour, but is instead received within it. This can be particularly advantageous because both heat transfer surfaces of a cooling channel are thus exposed within this heat transfer device. Consequently, more surface area is available for heat transfer, especially for heat dissipation.

[0028] At least one battery component holder part can have at least one receiving device on each of two opposite sides of the battery component holder part, and each receiving device of this battery component holder part can have an inner contour for receiving a heat transfer device, and a heat transfer device can be arranged such that it is partially adjacent to each inner contour of each receiving device of this battery component holder part or partially arranged in each inner contour of each receiving device of this battery component holder part.

[0029] A battery component holder designed in this way has the particular advantage that the battery components arranged in the receiving volume or space are in contact with the heat transfer device on two sides. This allows for further improved heat transfer and heat dissipation.

[0030] In such a configuration, a heat transfer device can, for example, be arranged on both battery component holder parts. In this respect, two receiving devices of each of the two battery component holder parts can, for example, form a substantially cylindrical receiving volume. In this configuration, each receiving device has an inner contour, so that the heat transfer direction can define the receiving space for the battery components on two sides of this receiving volume bounded by two receiving devices. A cylindrical battery cell received in such a receiving space is therefore in contact with the heat transfer surfaces of one and the same heat transfer device at two areas of its outer surface.

[0031] A heat transfer device may have at least one coolant channel for a liquid coolant, and the at least one coolant channel of this heat transfer device may have a coolant channel connection for connecting the coolant channel to a coolant supply, and the at least one coolant channel of this heat transfer device may be arranged on a structural element.

[0032] A heat transfer device or battery component holder designed in this way has the particular advantage that it can be flooded with a refrigerant or coolant. In this respect, effective heat transfer and, in particular, effective heat dissipation can be ensured.

[0033] Such a refrigerant or coolant can, for example, comprise water, R134a, hydrofluorocarbons, hydrofluoroolefins, or carbon dioxide. Preferably, a heat transfer device can comprise several coolant channels. In the case of a planar heat transfer device, one or more coolant channels can be arranged on each side of the heat transfer device. Furthermore, a coolant channel can be arranged on both sides of a heat transfer device simultaneously. A coolant channel can also have one or, preferably, two coolant channel connections, wherein one coolant channel connection represents the coolant inflow to the coolant channel and the other coolant channel connection represents the coolant outflow.For example, it is possible that both coolant channel connections of a coolant channel are located on one side of a flat heat transfer device, and that the coolant channel on this side is arranged in a meandering pattern. In other words, the coolant in the coolant channel can flow away from the coolant channel connections on one half of the side of the heat transfer device and flow back on the other half. Other arrangements are also possible.

[0034] A structural element can be understood, in particular, as an element of a heat transfer device that accommodates, encloses, and / or reinforces a coolant channel. It is also conceivable that a structural element accommodates and / or connects two or more coolant channels. A structural element can thus also accommodate or reinforce one or more coolant channel connections. A heat transfer device can, for example, be formed from two superimposed plastic films, whereby the plastic films can be welded together in such a way that a coolant channel is formed between two welds. The welds themselves can, for example, be referred to as structural elements.

[0035] A coolant channel connection can be configured as an opening in a coolant channel. A coolant channel connection can preferably include a sleeve, for example made of plastic, which is arranged fluid-tight at the opening or on the coolant channel. A sleeve can, for example, be welded to the coolant channel. A coolant channel connection can also project from both sides of a flat heat transfer device. In this respect, a coolant channel connection can also include two openings arranged on both sides of the heat transfer device in a coolant channel.

[0036] The battery component holder can have at least two heat transfer devices, each of which has at least one coolant channel for a liquid coolant, wherein the coolant channels of the heat transfer devices each have a coolant channel connection for connecting the coolant channel to a coolant supply, and wherein at least two coolant connections of two heat transfer devices are fluid-tightly connected to each other by means of an adapter tube.

[0037] A battery component holder designed in this way offers the particular advantage that several heat transfer devices can be connected to each other in a fluid-tight manner. This allows a large number of heat transfer devices to be connected to the same coolant supply in a simple way and with low system complexity.

[0038] At least two connection points of at least two adjacent battery component holder parts can be directly or indirectly fluid-tightly connected to each other.

[0039] At least one heat transfer device can be designed as a flexible heat transfer device.

[0040] A heat transfer device designed in this way has the particular advantage that a certain contact force can be applied between the heat transfer surfaces and the battery components it houses. This contact force can be achieved, for example, by adjusting the pressure within the coolant channels. Furthermore, a flexible heat transfer device can also respond to the expansion of the battery components and compress or retract slightly.

[0041] A flexible heat transfer device can, for example, be made of or comprise plastic. For instance, it can be formed from two plastic films arranged one above the other and partially welded together. Preferably, the welded plastic films each have a thickness in the range of 0.05 mm to 0.4 mm, more preferably in the range of 0.07 mm to 0.3 mm, even more preferably in the range of 0.1 mm to 0.2 mm, and most preferably a thickness of 0.15 mm. The plastic films are preferably multilayered and comprise a metal layer, for example, an aluminum layer, and at least one plastic layer, for example, made of polyamide. It is also possible for a flexible heat transfer device to comprise fiber composites or to be flexible only in certain areas, for example, with a rigid structural element.

[0042] At least one battery component holder part can have at least one guide device for guiding a heat transfer device, and the at least one guide device can comprise a guide surface, wherein the heat transfer device is arranged at least partially on the guide surface.

[0043] A battery component holder designed in this way offers the particular advantage that the heat transfer device can be guided and supported safely and without stress. In particular, this allows for support of the heat transfer device at critical points without requiring fundamental modifications to the design of the battery component holder.

[0044] For example, a guide device can be detachably arranged on a battery component holder. In this respect, depending on the actual arrangement of the heat transfer device, a guide device can be positioned such that critical areas of the heat transfer device, i.e., areas subject to high mechanical loads, are supported. For example, a guide device can be attached to a battery component holder using snap-fit ​​components. A guide surface of a guide device can be curved. For example, a guide surface can be shaped such that it essentially corresponds to the bend of the heat transfer device at the guided point. It is also possible for a guide surface to be flat and even.

[0045] Furthermore, it is also possible that at least one guide device is monolithically formed with the battery component holder part.

[0046] At least one heat transfer device can be detachably arranged on the battery component holder part.

[0047] A battery component holder designed in this way offers the particular advantage that the heat transfer device can be removed and thus also replaced. This means, for example, that a defective heat transfer device can be replaced without having to replace the entire battery component holder. Furthermore, it is possible to position and adapt a heat transfer device depending on the requirements of the battery components. For example, a heat transfer device can be flexible and inserted into a battery component holder. It is also possible for a flexible or rigid heat transfer device to be inserted into a recess or other specially designed receptacle provided for this purpose on a part of the battery component holder.A heat transfer device can, for example, be attached to a battery component holder by means of connecting devices provided for this purpose, or be loosely attached to it, whereby in the latter embodiment the heat transfer device can be positioned or held in place, for example, by the arranged battery components.

[0048] At least one battery component holder part may have at least one connection device for connection to the heat transfer device associated with it.

[0049] A battery component holder designed in this way offers the particular advantage that the heat transfer device can be securely and stress-free connected to the battery component holder using such a connection device. Furthermore, both the assembly and any subsequent disassembly of the battery component holder are facilitated. Connecting the heat transfer device to the battery component holder using a connection device also ensures that the heat transfer device is always positioned correctly.

[0050] For example, a connecting device can be a single piece and protrude, for instance, at a right angle from a battery component holder part. In this respect, a connecting device can be described, for example, as a "pin," a "bridge," or a "hook." A connecting device can have two ends and, at the end not attached to the battery component holder, a type of locking mechanism. By means of this locking mechanism, a heat transfer device can, for example, be positively connected to the connecting device and thus indirectly to the battery component holder part.

[0051] Such a locking device can be designed, for example, as a hook or a snap-fit ​​hook. A heat transfer device can thus have a recess, for example in its structural element, and the connecting device can engage this recess. When the heat transfer device is positioned on the connecting device, a certain force may be necessary to push the recess over the locking device and thus overcome it. Conversely, when removing the heat transfer device from the connecting device, the locking device, for example a hook-shaped locking device, can prevent the locking mechanism from being overcome in that direction.

[0052] A connecting device can also be designed as a rivet, for example, a hollow rivet. In this case, the rivet can be positioned, for instance, on a battery component holder, and the heat transfer device can have a recess, for example, in its structural element. The rivet can penetrate this recess. After the heat transfer device has been slid over the rivet and positioned on the battery component holder, the rivet can be deformed, thereby increasing its diameter at one end. This deformation causes the end of the rivet to act as a locking device, preventing the heat transfer device from being removed from the rivet. In other words, after deformation, the end of the rivet can have a larger diameter than the recess of the heat transfer device.

[0053] It is also possible for a connecting device to be designed as a short pin or projection against which the heat transfer device rests in a state arranged on the battery component holder part. The heat transfer device can then be welded to the connecting device, preferably at its structural element. This can be done, for example, by a spot welding process, a laser welding process, or an ultrasonic welding process.

[0054] At least one connecting device can be designed in one piece with two ends, wherein one end is monolithically connected to the battery component holder part and the other end is detachably connected to the battery component holder part by force and / or form locking.

[0055] A connection device designed in this way offers the particular advantage that the heat transfer device can be securely and stress-free connected to the battery component holder. Furthermore, both the assembly and any subsequent disassembly of the battery component holder are facilitated. Connecting the heat transfer device to the battery component holder using such a device also ensures that the heat transfer device is always positioned correctly. Additionally, the heat transfer device can be pressed firmly against the battery component holder over a large area.

[0056] Such a connecting device can, for example, be an elongated web that connects the heat transfer device to the battery component holder along its entire length, and thus, for example, across its entire width. For instance, such a web can be attached to the battery component holder at one end by means of a film hinge. A film hinge can, for example, be designed as a thin, flexible plastic connection that serves as a hinge for the connecting device. The elongated part of the connecting device, i.e., the web, can be connected to the battery component holder at one end via this thin plastic connection or film hinge. The web can therefore be displaced around the axis formed by the film hinge.The end of the bridge opposite the film hinge can be designed to create a force-fit or form-fit connection with the battery component holder. In this respect, this end can, for example, have a snap-fit ​​hook.

[0057] For example, a connection device designed in this way can be used to accommodate a heat transfer device. Since the connection device is monolithically bonded to the battery component holder, simplified assembly is possible and no additional component is required. A heat transfer device can, for example, be inserted into such a connection device, and the connection device can then be closed. In this respect, the web can be positioned so that the end opposite the film hinge creates a positive fit with the battery component holder.

[0058] Preferably, the connecting device has a through-opening through which a connecting element of the heat transfer device projects and preferably engages behind it. The connecting device can further serve as a guide and / or as a support for guiding and / or supporting the heat transfer device.

[0059] At least one battery component holder can have at least one fastening means, wherein the at least one fastening means is detachably arranged on a battery component holder part and the battery component holder part and the fastening means sandwich-like enclose the heat transfer device.

[0060] A battery component holder designed in this way offers the particular advantage that the heat transfer device can be securely and stress-free connected to the battery component holder or the battery component holder part using such a fastening device. Furthermore, both the assembly and any subsequent disassembly of the battery component holder are facilitated. Connecting the heat transfer device to the battery component holder part using a fastening device also ensures that the heat transfer device is always positioned correctly. Additionally, the heat transfer device can be pressed against the battery component holder part over a large area.

[0061] A fastening element can, for example, be designed as an elongated web with two opposing ends. Its two ends can be designed to create a force-fit or form-fit connection with the battery component holder. In this respect, these ends can, for example, have a snap-fit ​​hook. During assembly of the fastening element, these snap-fit ​​hooks can engage, for example, designated webs, projections, or edges of the battery component holder or battery component holder part, thus creating a form-fit connection. In its position against the battery component holder part, the web can fasten or press the heat transfer device against the battery component holder part along its entire length, and thus, for example, across the entire width of the heat transfer device.

[0062] Preferably, the connecting device has a through-opening through which a connecting device of the heat transfer device projects and preferably engages behind it.

[0063] The connecting device can also serve as a guide device and / or as a support device for guiding and / or supporting the heat transfer device.

[0064] The present invention also aims to provide a battery housing that has improved recyclability and a simplified manufacturing process.

[0065] The problem underlying the present invention is solved by a battery housing for receiving a plurality of battery components, comprising a first battery housing component, a second battery housing component, and at least one battery component holder according to one of the examples described above, wherein the battery component holder is arranged sandwich-like between the first battery housing component and the second battery housing component and the battery component holder is connected to the first battery housing component and / or to the second battery housing component.

[0066] A battery housing designed in this way offers the advantage of improved, efficient recyclability. By eliminating the need for a complex potting compound, the battery housing can be recycled without the need for complicated separation processes to remove the potting compound from the battery housing components.

[0067] The feature according to which the battery component holder is sandwiched between the first battery housing component and the second battery housing component can also be expressed as the battery component holder being arranged as a sandwich core between the first battery housing component and the second battery housing component. Consequently, the battery component holder can also be referred to as a sandwich core.

[0068] The first battery housing component is preferably designed as a battery housing shell. The first battery housing component can also be referred to as the battery housing lower shell or, more generally, as the lower shell. The second battery housing component is preferably designed as a battery housing shell or as a battery housing cover, wherein the battery housing cover can also be designed as a battery housing shell. The second battery housing component can also be referred to as the battery housing upper shell or, more generally, as the upper shell.

[0069] The present invention also aims to provide a battery which has improved recyclability and a simplified manufacturing process.

[0070] The problem underlying the present invention is solved by a battery comprising at least one battery component holder according to one of the previously described embodiments or comprising a battery housing according to one of the previously described examples and a plurality of battery components, each of which is received in a receiving device of the at least one battery component holder. The present invention also aims to provide a motor vehicle which has a battery with improved recyclability.

[0071] This problem underlying the present invention is solved by a motor vehicle with a previously described battery, wherein the battery is energy-coupled with an electric drive motor of the motor vehicle.

[0072] Further advantages, details and features of the invention will become apparent from the illustrated examples below.

[0073] Specifically, they show:

[0074] Figure 1A: a schematic perspective view of an exemplary battery component holder;

[0075] Figure 1B: a schematic top view of an exemplary battery component holder;

[0076] Figure 2A: a schematic perspective view of an exemplary battery component holder part;

[0077] Figure 2B: a schematic perspective view of an exemplary heat transfer device;

[0078] Figure 2C: a schematic perspective view of the object of Figure 2B in the state mounted on the object of Figure 2A;

[0079] Figure 2D: another schematic perspective view of the object from Figure 2C; Figure 3A: a schematic top view of an exemplary battery component holder part;

[0080] Figure 3B: a schematic top view of an exemplary battery component holder;

[0081] Figure 4A: a section of a schematic sectional view of an exemplary battery component holder;

[0082] Figure 4B: a section of a schematic sectional view of an exemplary battery component holder;

[0083] Figure 5A: a section of a schematic sectional view of an exemplary battery component holder part;

[0084] Figure 5B: a section of a schematic sectional view of an exemplary battery component holder part;

[0085] Figure 5C: a section of a schematic sectional view of the object from Figure 5B after a transformation process;

[0086] Figure 5D: a section of a schematic sectional view of an exemplary battery component holder part;

[0087] Figure 6A: a section of a schematic sectional view of an exemplary battery component holder;

[0088] Figure 6B: a section of a schematic sectional view of an exemplary battery component holder.

[0089] In the following description, identical reference symbols denote identical components or identical features, so that a description given for one component in relation to one figure also applies to the other figures, thus avoiding repetitive descriptions. Furthermore, individual features described in connection with one embodiment can also be used separately in other embodiments.

[0090] Figure 1A shows a schematic perspective view of an exemplary battery component holder 1 in a partial exploded view. Figure 1A shows a battery component holder 1 for receiving at least one battery component 2. Four battery components 2, designed as cylindrical battery cells, are shown in Figure 1A. The battery component holder 1 has two pairs of a first battery component holder part 3 and a second battery component holder part 3. Figure 1A shows two pairs of battery component holder parts 3. The pair of battery component holder parts 3 arranged in the background is shown in a closed position, while the pair of battery component holder parts 3 arranged in the foreground is shown in an exploded view.The first battery component holder part 3 and the second battery component holder part 3 are arranged adjacent to each other in such a way that a first receiving device 4 of the first battery component holder part 3 and a second receiving device 4, not shown, of the second battery component holder part 3 together partially limit a receiving volume 5 for receiving the battery components 2.

[0091] The battery component holder 1 has a heat transfer device 6, which is arranged in the receiving volume 5 between the first battery component holder part 3 and the second battery component holder part 3 such that two heat transfer surfaces 7 of the heat transfer device 6 partially delimit a receiving space 8 for receiving the battery components 2. The battery component holder parts 3 shown are each prismatic with two main surfaces 9 and four end faces 10 separating the two main surfaces 9. The battery component holder parts 3 are essentially solid. In this case, two pairs of battery component holder parts 3 form a battery component holder 1. However, it is also possible for, for example, one pair of battery component holder parts 3 to form a battery component holder 1.Furthermore, it is also possible that, for example, more than two pairs of battery component holder parts 3 form a battery component holder 1.

[0092] The battery component holder parts 3 are arranged adjacent to each other with one of their main surfaces 9 and one of their end faces 10 each being essentially congruent, and can therefore be described as being arranged adjacently. In this respect, the respective end faces 10 of the battery component holder parts 3 are each arranged in the same plane. The corresponding main surfaces 9 are in contact.

[0093] The receiving devices 4 are designed as recesses in the respective battery component holder part 3. A recess can be understood as a cutout in the prismatic basic shape of the battery component holder part 3. The recesses have a semicircular profile. In Figure 1A, a plurality of receiving devices 4 are arranged adjacent to one another in a battery component holder part 3. The receiving devices 4 thus have receiving surfaces 11, which also partially delimit the receiving space 8.

[0094] Figure 1B shows a schematic top view of an exemplary battery component holder 1. The battery component holder 1 shown in Figure 1B comprises three adjacent battery component holder parts 3. The centrally arranged battery component holder part 3 also includes a heat transfer device 6. The respective adjacent battery component holder parts 3 interact such that their receiving devices 4 define a receiving volume 5 and the heat transfer surfaces 7 arranged in the receiving volume 5 define a receiving space 8 for the battery components 2.

[0095] In this respect, a receiving device 4 of a first battery component holder part 3 and a second receiving device 4 of a second battery component holder part 3 jointly define a receiving volume 5 for receiving a battery component 2. The two receiving devices 4, each associated with the other, are each designed as a recess with a semicircular profile in their respective battery component holder part 3. When these two battery component holder parts 3 are arranged adjacent to each other, these two receiving devices 4 form a receiving volume 5 with a substantially circular profile. In the present case, each battery component holder part 3 comprises four adjacent receiving devices 4, each of which, together with a receiving device 4 of the adjacent battery component holder part 3, defines a receiving volume 5 in this manner.

[0096] Each receiving space 8 is partially delimited by the heat transfer device 6, in particular by the heat transfer surface 7 of the heat transfer device 6. The receiving spaces 8 are designed such that a battery component 2, in this case a cylindrical battery cell, is positively and, if necessary, force-fitted within the receiving space 8. The lateral surfaces 12 of the battery components 2, which are designed as cylindrical battery cells, are in contact with the heat transfer surfaces 7 that delimit the receiving spaces 8.

[0097] Figure 2A shows a schematic perspective view of an exemplary battery component holder part 3. The battery component holder part 3 shown corresponds essentially to the battery component holder part 3 shown in Figure 1A. Reference is made to the descriptions relating to Figure 1A. Furthermore, Figure 2A shows that the battery component holder part 3 also has receiving devices 4 and receiving surfaces 11 on the side facing away from the viewing side. The battery component holder part 3 can also be described as a frame with an imaginary prismatic basic shape.

[0098] Figure 2B shows a schematic perspective view of an exemplary heat transfer device 6. The heat transfer device 6 is designed as a flat surface and is floodable with a refrigerant or coolant, and therefore includes two coolant channels 13. The coolant channels 13 are also designed as flat surfaces, so that the largest possible surface area, i.e., the heat transfer surface 7, is available for contact with the battery component 2 to be cooled. The heat transfer device 6 shown can be connected to the battery component holder 1 or to the battery component holder part 3.

[0099] Each coolant channel 13 has a coolant channel connection 14. Each coolant channel 13 is arranged on a structural element 15. A structural element 15 can be understood, in particular, as an element of a heat transfer device 6 that accommodates, surrounds, or reinforces a coolant channel 13. In this case, a structural element 15 accommodates two coolant channels 13 and connects them to each other. The structural element 15 also accommodates the coolant channel connections 14.

[0100] Figure 2C shows a schematic perspective view of the object of Figure 2B in the state mounted on the object of Figure 2A. In this respect, reference is made to the respective descriptions of the figures with regard to the objects shown in Figures 2A and 2B. The heat transfer device 6 is arranged in each receiving device 4. In this respect, the heat transfer device 6 is also arranged in the receiving volume 5. The two heat transfer surfaces 7 define a receiving space 8 within the receiving volume 5, or, in this case, four largely delimited receiving spaces 8, for receiving four battery components 2. In other words, the heat transfer surfaces 7 are directed into the "cavity" of the receiving volume 5. A battery component 2 can be arranged on these heat transfer surfaces 7 in order to provide the largest possible surface area for heat transfer.

[0101] Figure 2D shows another schematic perspective view of the object from Figure 2C. Figure 2D shows the back side of the object from Figure 2C. Therefore, reference is also made to the description of Figure 2C. Figure 2D shows that the battery component holder part 3 also has receiving devices 4 with receiving surfaces 11 on its opposite side, i.e., the "back side". Therefore, battery components 2 can also be received on the back side of the battery component holder part 8 shown.

[0102] Figure 3A shows a schematic top view of an exemplary battery component holder part 3. The battery component holder part 3 shown has four receiving devices 4 on each of two opposite sides, or main surfaces 9, of the battery component holder part 3. The coolant channel connection 14 shown in Figure 3A is connected to a connection receptacle 17 provided in the battery component holder part 3. The coolant channel connection 14 is further configured to be indirectly fluid-tight connected to the connection receptacle 17, namely by means of an adapter (not shown).

[0103] Furthermore, the battery component holder part 3 shown has a plurality of guide elements 18 for guiding the heat transfer device 6. Each guide element 18 comprises a guide surface 19, with the heat transfer device 6 being arranged in sections on the respective guide surfaces 19. The guide elements 18 are positioned such that critical areas of the heat transfer device 6, for example, areas where high mechanical loads act, are supported. The guide surfaces 19 of the guide elements 18 are curved, essentially corresponding to the bend of the heat transfer device 6 at the guided points.

[0104] Figure 3B shows a schematic top view of an exemplary battery component holder 1. Figure 3B shows two of the battery component holder parts 3 shown in Figure 3A, each sandwiched between two further battery component holder parts 3. The battery component holder parts 3 are arranged adjacent to each other and are designed such that the receiving devices 4 of each pair of adjacent battery component holder parts 3, together with the heat transfer devices 6, define four receiving spaces 8 for receiving one battery component 2 each.

[0105] Furthermore, the battery component holder parts 3 each have a connection receptacle 17 such that each connection receptacle 17 accommodates either a coolant channel connection 14 and / or an adapter tube 20, at least partially. The coolant channel connections 14 of the heat transfer devices 6 are fluid-tightly connected to each other by means of the adapter tubes 20. In other words, each pair of connection receptacles 17 of adjacent battery component holder parts 3 is indirectly fluid-tightly connected to each other. Thus, an elongated coolant supply is formed from a multitude of connected adapter tubes 20 and coolant channel connections 14. Figure 4A shows a section of a schematic sectional view of an exemplary battery component holder 1. The battery component holder 1 comprises two battery component holder parts 3 which are arranged adjacent to each other.The receiving devices of the battery component holder parts 3 define a receiving volume in which two heat transfer devices 6 are also arranged. The heat transfer devices 6, together with the receiving surfaces 11 of the receiving devices, define the receiving space in which a battery component 2 is received.

[0106] The battery component holder 1 shown in Figure 4A has both vertically oriented receiving surfaces 11, which fix the battery component 2 in the horizontal direction, and horizontally oriented receiving surfaces 11, which also horizontally delimit the receiving space 8 and thus fix the battery component 2 in the vertical direction. Furthermore, each of the vertically oriented receiving surfaces 11 has a recess in which the heat transfer devices 6 are accommodated. These recesses can also be referred to as the inner contour 16 in which the heat transfer devices 6 are accommodated.

[0107] Figure 4B shows a section of a schematic sectional view of an exemplary battery component holder 1. The battery component holder 1 shown corresponds essentially to the battery component holder 1 shown in Figure 4A, and therefore reference is made to the corresponding description. The battery component holder shown in Figure 4B differs from that shown in Figure 4A essentially in that it also provides internal contours 16 for receiving the heat transfer devices 6. In other words, the internal contours 16 are arranged relative to the receiving surfaces 11 such that the heat transfer devices 6, in particular their heat transfer surfaces 7, are flush with the receiving surfaces 11. In this respect, the heat transfer devices 6 are better received by or in contact with the internal contours 16.

[0108] Figure 5A shows a section of a schematic sectional view of an exemplary battery component holder part 3. In particular, Figure 5A shows the receiving surfaces 11 and the inner contour 16 of a receiving device 4. A heat transfer device 6 is arranged adjacent to the inner contour 16 and flush with the receiving surfaces 11. This heat transfer device 6 is connected to the battery component holder part 3 by means of a connecting device 21.

[0109] The connecting device 21 is formed in one piece and projects at right angles from the battery component holder part 3. Therefore, the connecting device 21 can be described, for example, as a "pin," a "bridge," or a "hook." The connecting device 21 has a locking device 22 at one end, which is not located on the battery component holder 3. By means of this locking device 22, the heat transfer device 6 is positively connected to the connecting device 21 and thus indirectly to the battery component holder part 3. In Figure 5A, the locking device 22 is designed as a hook or a snap-fit ​​hook. The heat transfer device 6 has a recess 23, in this case in its structural element 15, and the connecting device 21 engages this recess 23.When the heat transfer device 6 is attached to the connecting device 21, a certain force is required to push the recess 23 over the locking device 22 and thus overcome the locking device 22. In the other direction, i.e., when removing the heat transfer device 6 from the connecting device 21, the locking device 22, i.e., the hook, prevents overcoming the locking mechanism 22 and thus the removal of the heat transfer device 6 from the battery component holder part 3.

[0110] Figure 5B shows a section of a schematic sectional view of an exemplary battery component holder part 3, while Figure 5C shows the same section of the object from Figure 5B after a forming process. Figures 5B and 5C also show the receiving surfaces 11 and the inner contour 16 of a receiving device 4. A heat transfer device 6 is arranged adjacent to the inner contour 16 and flush with the receiving surfaces 11. This heat transfer device 6 is connected to the battery component holder part 3 by means of a connecting device 21.

[0111] The connecting device 21 shown in Figures 5B and 5C is designed as a rivet or a hollow rivet. The hollow rivet is arranged on the battery component holder part 3, and the heat transfer device 6 has a recess 23 in its structural element 15. The hollow rivet extends through this recess 15 in both Figures 5B and 5C. After the heat transfer device 6 has been slid over the hollow rivet and thus arranged on the battery component holder part 3, the hollow rivet can be deformed and its diameter increased. Figure 5B shows the state of the connecting device 21 before deformation, while Figure 5C shows the state of the connecting device 21 after deformation. Due to this deformation, the end of the hollow rivet serves as a locking device 22, since the heat transfer device 6 can no longer be removed from the hollow rivet.In other words, after deformation, the end of the hollow rivet has a larger diameter than the recess 23 of the heat transfer device 6. The locking device 22 prevents the locking direction 22 from being overcome and thus prevents the heat transfer device 6 from being removed from the battery component holder part 3.

[0112] Figure 5D also shows a section of a schematic sectional view of an exemplary battery component holder part 3. Figure 5D also shows the receiving surfaces 11 and the inner contour 16 of a receiving device 4. A heat transfer device 6 is arranged adjacent to the inner contour 16 and flush with the receiving surfaces 11. This heat transfer device 6 is connected to the battery component holder part 3 by means of a connecting device 21. The connecting device 21 is designed as a short pin or projection against which the heat transfer device 6 rests in its position on the battery component holder part 3. The heat transfer device 6 is welded to the connecting device 21 at its structural element 15. Welding can be carried out, for example, by a spot welding process, a laser welding process, or an ultrasonic welding process.

[0113] Figures 6A and 6B show a section of a schematic sectional view of an exemplary battery component holder 1. The object of Figure 6A corresponds essentially to the object of Figure 4A, and therefore reference is made to the corresponding description. The object of Figure 6B corresponds essentially to the object of Figure 4B, and therefore reference is made to the corresponding description.

[0114] The object of Figure 6A differs from the object of Figure 4A in that a connecting device 21 is provided on each battery component holder part 3. Each connecting device 21 is formed in one piece with two ends 24A, 24B, wherein one end 24A is monolithically connected to the battery component holder part 3 and the other end 24B is detachably connected to the battery component holder part 3 by force and form locking.

[0115] The connecting device 21 is designed as an elongated web 25, which connects the heat transfer device 6 to the battery component holder 3 along its entire length, and thus across the entire width of the heat transfer device 6. At one end 24A, the web 25 is attached to the battery component holder 3 by means of a film hinge. A film hinge can be understood as a thin, flexible plastic connection that serves as a hinge for the connecting device 21. The web 25 can therefore be pivoted back and forth. The end of the web 24B opposite the film hinge is designed to create a force-fit or form-fit connection with the battery component holder 3. This end 24B includes a snap-fit ​​hook that engages a projection 26 provided for this purpose in the battery component holder 3.

[0116] The object of Figure 6B differs from the object of Figure 4B in that a fastening means 27 is provided on each battery component holder part 3. Each fastening means 27 is formed in one piece with two ends 28A, 28B, both ends 28A, 28B being detachably connected to the battery component holder part 3 by a force-fit and form-fit connection. Thus, each battery component holder 3 j has a fastening means 27, the fastening means 27 being detachably arranged on the battery component holder part 3, and the battery component holder part 3 and the fastening means 28 enclose the respective heat transfer device 6 in a sandwich-like manner. Both ends 28A, 28B have a snap-fit ​​hook which engages a projection 26 provided for this purpose in the respective battery component holder part 3 and thus creates a positive connection.In the state arranged against the battery component holder part 3, the fastening means 27 presses the heat transfer device 6 against the battery component holder part 3 over its entire length, and thus over the entire width of the heat transfer device 6.

[0117] Reference symbol list

[0118] 1. Battery component holder

[0119] 2. Battery component

[0120] 3. Battery component holder part

[0121] 4. Reception facility

[0122] 5. Recording volume

[0123] 6. Heat transfer device

[0124] 7. Heat transfer surfaces

[0125] 8. Recording room

[0126] 9. Main surface (of a battery component holder part)

[0127] 10. End face (of a battery component holder part)

[0128] 11. Recording areas

[0129] 12. Surface area (of the battery component)

[0130] 13. Coolant channel

[0131] 14. Coolant channel connection

[0132] 15. Structural element

[0133] 16. Inner contour (of the receiving device)

[0134] 17. Connection

[0135] 18. Command center

[0136] 19. Guide surfaces

[0137] 20. Adapter tube

[0138] 21. Connection device

[0139] 22. Locking device

[0140] 23. Recess (in the heat transfer device)

[0141] 24A. End (of the connecting device)

[0142] 24B. End (of the connection device)

[0143] 25. Bridge (of the connecting device)

[0144] 26. Protrusion (In the battery component holder part)

[0145] 27. Fasteners

[0146] 28A. End (of the fastening device)

[0147] 28B. End (of the fastener)

Claims

Patent claims 1. Battery component holder (1) for receiving at least one battery component (2) , comprising a first battery component holder part (3) and a second battery component holder part (3) , wherein the first battery component holder part (3) and the second battery component holder part (3) are arranged adjacent to each other such that a first receiving device (4) of the first The battery component holder part (3) and a second receiving device (4) of the second battery component holder part (3) together define a receiving volume (5) for receiving at least one battery component (2), wherein the battery component holder (1) is characterized by the following feature: the battery component holder (1) has a heat transfer device (6) which is located in the receiving volume (5) between the first The battery component holder part (3) and the second battery component holder part (3) are arranged such that a heat transfer surface (7) of the heat transfer device (6) at least partially limits a receiving space (8) for receiving at least one battery component (2).

2. Battery component holder (1) according to the preceding claim, characterized by the following features: the first receiving device (4) and / or the second receiving device (4) has / have an inner contour (16) for receiving a heat transfer device (6); at least one heat transfer device (6) is at least partially adjacent to or arranged in an inner contour (16).

3. Battery component holder (1) according to the preceding claim, characterized by the following features: at least one battery component holder part (3) has at least one receiving device (4) on each of two opposite sides of the battery component holder part (3); and each receiving device (4) of this battery component holder part (3) has an inner contour (16) for receiving a heat transfer device (6); and a heat transfer device (6) is arranged such that it is partially adjacent to each inner contour (16) of each receiving device (4) of this battery component holder part (3) or partially located in each inner contour (16) of each receiving device (4) of this battery component holder part (3).

4. Battery component holder (1) according to one of the preceding claims, characterized by the following features: a heat transfer device (6) has at least one coolant channel (13) for a liquid coolant; and the at least one coolant channel (13) of this heat transfer device (6) has a coolant channel connection (14) for connecting the coolant channel (13) to a coolant supply; and the at least one coolant channel (13) of this heat transfer device (6) is arranged on a structural element (15).

5. Battery component holder (1) according to the preceding claim, characterized by the following features: the battery component holder (1) has at least two heat transfer devices (6), each of which has at least one coolant channel (13) for a liquid coolant; the coolant channels (13) of the heat transfer devices (6) each have a coolant channel connection (14) for connecting the coolant channel (13) to a coolant supply; and at least two coolant connections (14) of two heat transfer devices (6) are fluid-tightly connected to each other by means of an adapter tube (20).

6. Battery component holder (1) according to one of the preceding claims, characterized by the following feature: at least one heat transfer device (6) is designed as a flexible heat transfer device (6).

7. Battery component holder (1) according to the preceding claim, characterized by the following features: at least one battery component holder part (3) has at least one guide device (18) for guiding a heat transfer device (6); and the at least one guide device (18) comprises a guide surface (19) wherein the heat transfer device (6) is arranged at least partially on the guide surface (19).

8. Battery component holder (1) according to one of the preceding Claims characterized by the following feature: at least one heat transfer device (6) is detachably arranged on the battery component holder part (3).

9. Battery component holder (1) according to the preceding claim, characterized by the following feature: at least one battery component holder part (3) has at least one connecting device (21) for connection with the heat transfer device (6) associated therewith.

10. Battery component holder (1) according to the preceding claim, characterized by the following features: at least one connecting device (21) is formed in one piece with two ends (24A, 24B), wherein one end (24A) is monolithically connected to the battery component holder part (3) and the other end (24B) is detachably connected to the battery component holder part (3) by force and / or form locking.

11. Battery component holder (1) according to one of claims 8 to 10, characterized by the following features: at least one battery component holder (1) has at least one fastening means (27), wherein the at least one fastening means (27) is detachably arranged on a battery component holder part (3) and the battery component holder part (3) and the fastening means (27) sandwich-like enclose the heat transfer device (6).

12. Battery housing for receiving a plurality of battery components (2) comprising a first battery housing component; a second battery housing component; at least one battery component holder (1) according to one of the preceding claims, wherein the battery component holder (1) is arranged sandwich-like between the first battery housing component and the second battery housing component; and the battery component holder (1) is connected to the first battery housing component and / or to the second battery housing component.

13. Battery comprising at least one battery component holder (1) according to any one of claims 1 to 11; or a battery housing according to claim 12; and a plurality of battery components (2) each received in a receiving device (4) of the at least one battery component holder (1).

14. Motor vehicle with a battery according to claim 13, wherein the battery is energy-coupled with an electric drive motor of the motor vehicle.

Images