BATTERY DEVICE

Description

[0001] The present invention relates to a battery device.

[0002] The present invention is based on the object of providing a battery device that can be manufactured simply and cost-effectively. Relevant prior art can be found, for example, in documents US 2006 / 028170 A1, DE 10 2016 214640 A1, and DE 10 2015 221269 A1.

[0003] This problem is solved by the features of the independent device claim.

[0004] Advantageous further training is the subject of the subclaims.

[0005] The battery device according to the invention preferably comprises the following: One or more battery modules, wherein each battery module comprises the following: a frame element; a floor element; and several battery cells.

[0006] Preferably, the battery modules are arranged or can be arranged along a stacking direction.

[0007] For example, it is conceivable that a battery module comprises at least approximately 50 battery cells.

[0008] For example, it may be advantageous if a battery module comprises approximately 200 to approximately 600 battery cells, for example approximately 400 battery cells.

[0009] The battery device comprises, for example, two or more than two battery modules.

[0010] The frame element of a respective battery module is preferably designed to be closed in a ring shape.

[0011] Preferably, the frame element and the base element of a respective battery module define a particularly pot-shaped receiving space in which battery cells of the battery module are received.

[0012] It may be advantageous if the receiving space of a battery module is delimited by the frame element and the base element of the battery module as well as by the base element of an adjacent battery module.

[0013] The battery device can preferably be arranged such that the stacking direction of the battery modules runs parallel to the direction of gravity. The battery device is arranged in particular in an upright position.

[0014] Alternatively, it is conceivable that the battery device can be arranged such that the stacking direction of the battery modules runs essentially perpendicular to the direction of gravity. The battery device is arranged in particular "horizontally."

[0015] The frame element of a respective battery module preferably surrounds all battery cells of the battery module, in particular in a direction perpendicular to the stacking direction.

[0016] The battery cells are preferably galvanic cells.

[0017] In particular, the battery cells are so-called secondary cells.

[0018] It can be advantageous if the battery cells, especially the secondary cells, are rechargeable.

[0019] Preferably, the battery modules of the battery device are self-supporting.

[0020] In the embodiment of the battery device according to the invention, it is provided that the frame elements of the respective battery modules form housing sections of the battery device.

[0021] Preferably, the frame elements of the battery modules together form an outer skin of the battery device.

[0022] Preferably, the frame element of a respective battery module comprises an annularly closed wall.

[0023] For example, it is conceivable that the frame element comprises a connecting web which is arranged between two opposite wall sections of the wall of the frame element and connects them to one another.

[0024] In particular, a surface of the wall of the respective frame element forms part of a surface of a housing of the battery device. It may be advantageous if each frame element comprises a double wall comprising an inner wall element and an outer wall element.

[0025] Preferably, a wall, in particular an outer wall element of a double wall, of a respective frame element forms part of a housing of the battery device, in particular part of an overall housing of the battery device, in a direction perpendicular to the stacking direction of the battery modules.

[0026] Preferably, the frame elements of the battery modules of the battery device are thus not limited in a radial direction by an additional housing.

[0027] Preferably, the manufacturing costs of the battery device can be reduced by eliminating the need for an additional housing.

[0028] In the context of this description and the appended claims, a radial direction is understood to mean in particular a direction running transversely, preferably perpendicularly, to the stacking direction of the battery modules.

[0029] In one embodiment of the battery device, it is provided that longitudinal axes of the battery cells of a respective battery module are arranged substantially parallel to the stacking direction of the battery modules.

[0030] If longitudinal axes of the battery cells of a respective battery module are arranged substantially parallel to the stacking direction of the battery modules, an outer contour of the frame elements of the battery modules can preferably be optimally adapted to an available installation space, for example in a vehicle.

[0031] In particular, the available installation space, for example in a vehicle, can be optimally utilized.

[0032] It may be advantageous if a filling level of a receiving space of the battery modules of the battery device can be increased by arranging the longitudinal axes of the battery cells parallel to the stacking direction of the battery modules.

[0033] In the context of this description and the appended claims, a degree of filling of a receiving space of the respective battery modules is understood to mean in particular a ratio of the displacement volume displaced by the battery cells arranged in the receiving space to a total volume of the receiving space.

[0034] Preferably, an energy storage capacity of the battery modules and in particular of the battery device can be increased by increasing the filling level.

[0035] In one embodiment of the battery device, it is provided that the battery cells are round cells.

[0036] The battery cells are preferably circular cylindrical battery cells, in particular circular cylindrical round cells.

[0037] The battery cells are preferably designed to be at least approximately rotationally symmetrical to a longitudinal axis thereof.

[0038] Alternatively, it is conceivable that the battery cells are prismatic cells.

[0039] Preferably, the filling level of a receiving space of a respective battery module can be increased by using round cells.

[0040] Preferably, the use of round cells allows for optimal utilization of the receiving space of a battery module. In particular, the use of round cells allows the receiving space of a battery module to be at least approximately completely filled.

[0041] In one embodiment of the battery device, it is provided that the battery device comprises two end bodies, wherein the battery modules of the battery device are preferably arranged between the two end bodies.

[0042] For example, it is conceivable that the two end bodies comprise or are formed from a metallic material, in particular steel or aluminum.

[0043] In one embodiment of the battery device, it is provided that the two end bodies comprise fastening elements by means of which the battery device can be fixed to a supporting structure, for example to a supporting structure of a vehicle.

[0044] Alternatively or additionally, it is conceivable that the battery modules each comprise one or more additional fastening elements by means of which the battery device can be fixed to a supporting structure.

[0045] For example, only the two end bodies comprise fastening elements by means of which the battery device can be fixed to a supporting structure.

[0046] It may therefore be advantageous if the battery device can be fixed to a supporting structure only by means of the end bodies.

[0047] In one embodiment of the battery device, it is provided that the battery modules of the battery device are clamped or can be clamped together.

[0048] In particular, it is conceivable that the battery modules of the battery device are clamped or can be clamped between the two end bodies.

[0049] It may be particularly advantageous if, by clamping the battery modules, essentially no force is exerted on the battery cells of the battery modules, in particular parallel to the stacking direction and / or parallel to a longitudinal axis of the battery cells of a respective battery module.

[0050] For example, it can be provided that the battery modules of the battery device are clamped or can be clamped between the two end bodies by means of one or more clamping elements.

[0051] In particular, it is conceivable that the tensioning elements are so-called tension anchors.

[0052] It can be advantageous if the clamping elements comprise or are made of a metallic material, for example steel or aluminum.

[0053] Preferably, the clamping elements comprise steel or are formed from it.

[0054] Tension rods designed as tensioning elements each comprise, in particular, a metallic rod with a thread. To clamp the battery modules, the rod can preferably be arranged parallel to the stacking direction. The battery modules can preferably be clamped together, in particular between the two end bodies, by means of one or more screw elements that can be screwed onto the rod.

[0055] For example, it is conceivable that the battery modules are clamped in the stacking direction with a clamping force which corresponds to a tension of at most approximately 30%, for example of at most approximately 50%, of an upper yield point of a material of the clamping elements.

[0056] In one embodiment of the battery device, it is provided that each battery module comprises a sealing element.

[0057] The sealing element of a battery module is preferably an annular sealing element.

[0058] It can be advantageous if the sealing element comprises or is made of a plastic material.

[0059] The sealing element of a respective battery module is, for example, received or can be received in a receiving groove of the battery module.

[0060] For example, it is conceivable that the receiving groove for receiving the sealing element is arranged on and / or formed in an end face of the frame element of a respective battery module arranged perpendicular to the stacking direction.

[0061] It may be advantageous if a sealing element of a respective battery module is compressed by clamping the battery modules of the battery device between two adjacent battery modules, in particular between a frame element and a base element of two adjacent battery modules.

[0062] For example, a sealing effect in accordance with protection class IP 6K9K can be achieved by means of a sealing element of a respective battery module.

[0063] In one embodiment of the battery device, it is provided that the battery cells of a respective battery module are fixed to the base element of the battery module.

[0064] Preferably, the battery cells and the base element are not in direct material contact.

[0065] Preferably, the battery cells, in particular cell bottoms of the battery cells, are at a distance from the bottom element, for example in the range of approximately 0.2 mm to approximately 1.5 mm, preferably in the range of approximately 0.3 mm to approximately 1 mm.

[0066] Preferably, the battery cells of a respective battery module are directly and / or indirectly thermally coupled to the base element of the battery module and / or electrically insulated from the base element.

[0067] It may be advantageous if the battery cells of a respective battery module are thermally coupled to the base element and / or electrically insulated from it by means of a thermally conductive paste and / or a potting compound.

[0068] In particular, it can be provided that the battery cells of a respective battery module are integrally connected to the base element of the battery module by means of a potting compound.

[0069] Preferably, the battery cells of a respective battery module are arranged at a distance from the base element by means of potting compound and connected to it by means of the potting compound, for example at a distance in the range of approximately 0.2 mm to approximately 1.5 mm, preferably in the range of approximately 0.3 mm to approximately 1 mm.

[0070] For example, it is conceivable that the battery cells of a respective battery module are completely embedded in the potting compound.

[0071] Alternatively, it is conceivable, for example, that at least approximately 30%, for example at least approximately 50%, of a respective battery cell is embedded in potting compound based on a length of the battery cell measured parallel to a longitudinal axis of the battery cell.

[0072] The potting compound includes, for example, polyurethane, silicone and / or an epoxy resin.

[0073] For example, it is conceivable that the casting compound is a one-component material, a two-component material or a multi-component material.

[0074] It may be advantageous, for example, if the casting compound is a two-component material with a hardener, in particular a cross-linking agent.

[0075] It can be particularly advantageous if the casting compound is heat-curing and / or moisture-curing.

[0076] It can be advantageous if the battery cells of a respective battery module are each embedded in a first potting compound and in a second potting compound.

[0077] In particular, it is conceivable for the battery cells to be integrally connected to the base element of a respective battery module by means of a first potting compound. Preferably, at most approximately 50%, for example, at most approximately 40%, in particular at most approximately 30%, of a respective battery cell, based on a length of the battery cell measured parallel to a longitudinal axis of the battery cell, is embedded in the first potting compound.

[0078] Preferably, the battery cells are further embedded in a second potting compound, by means of which a receiving space of a respective battery module is at least partially filled. For example, the receiving space of a respective battery module is foamed with the second potting compound.

[0079] It can be advantageous if the first casting compound has a higher strength than the second casting compound.

[0080] In particular, it is conceivable that the first potting compound has a higher density than the second potting compound.

[0081] Furthermore, it is particularly conceivable that the second potting compound has a lower thermal conductivity than the first potting compound.

[0082] The second casting compound is, for example, a foam material.

[0083] If the battery cells of a respective battery module are thermally coupled directly to the base element, the battery module has, for example, the following stacking sequence: base element, electrical insulation foil, thermal paste, battery cell. It can be particularly advantageous if there is no gap between the individual layers and / or elements.

[0084] If the battery cells of a respective battery module are indirectly thermally coupled to the base element, the battery cells of the battery module are, for example, directly thermally coupled to a potting compound. Preferably, the potting compound is in turn directly thermally coupled to the base element of the battery module. It may be advantageous if the battery cells are arranged at a distance from the base element.

[0085] It may be advantageous if the battery cells have a distance from the base element in a direction parallel to the stacking direction of the battery device in the range of approximately 0.2 mm to approximately 1.5 mm, preferably in the range of approximately 0.3 mm to approximately 1 mm.

[0086] In one embodiment of the battery device, it is provided that the frame element of a respective battery module comprises or forms a temperature control device.

[0087] It may be advantageous if the temperature control device is designed for active temperature control and / or passive temperature control.

[0088] For the purposes of this description and the appended claims, active temperature control is understood to mean, in particular, temperature control whose effect is essentially based on convection, in particular forced convection. Active temperature control is preferably achieved by a temperature control fluid flowing under external mechanical influence, in particular by a temperature control liquid flowing under external mechanical influence.

[0089] Active temperature control is achieved, for example, by liquid cooling.

[0090] In the context of this description and the appended claims, passive temperature control is understood to mean, in particular, a temperature control whose effect is essentially based on heat conduction.

[0091] It may be advantageous, for example, if the frame element comprises a temperature control channel through which a temperature control medium can flow.

[0092] A temperature control channel of the frame element is arranged or formed in particular in a wall, for example in a double wall, of the frame element.

[0093] Alternatively or additionally, it is conceivable that the temperature control device comprises one or more heat conducting elements, in particular one or more cooling fins.

[0094] One or more heat conducting elements of the tempering device are preferably arranged on an outer surface of the frame element.

[0095] For example, it is conceivable that heat conducting elements designed as cooling fins are arranged substantially parallel to the stacking direction.

[0096] Preferably, demoulding of the frame element can be facilitated by cooling fins running parallel to the stacking direction.

[0097] Preferably, an outer surface of the frame element can be enlarged by means of the heat conducting elements, in particular by means of the cooling fins.

[0098] If the frame element comprises or is formed from a metallic material, it can be provided that the temperature control device comprises one or more heat conducting elements, in particular cooling fins.

[0099] It may also be advantageous if the temperature control device comprises, in addition to one or more heat conducting elements, a fan by means of which the heat conducting elements can be blown onto in order to dissipate heat from them.

[0100] Alternatively or additionally, it is conceivable that the heat conducting elements can be blown onto by the wind when a vehicle is moving in order to dissipate heat from them.

[0101] In one embodiment of the battery device, it is provided that individual, several or all battery modules of the battery device each comprise a degassing element for degassing a receiving space of the respective battery module.

[0102] It may be advantageous if a degassing element of a battery module is arranged on the frame element of the battery module.

[0103] For example, it is conceivable that a degassing element comprises or is formed by a bursting element and / or a pressure compensation element.

[0104] If all battery modules of the battery device each comprise one or more degassing elements, a particularly short degassing path can preferably be realized so that hot gases can be guided as directly as possible into an environment of the battery device.

[0105] A propagation of a thermal runaway from battery cells of a battery module to other battery cells of the same battery module and / or to battery cells of neighboring battery modules can preferably be prevented.

[0106] In one embodiment of the battery device, it is provided that all battery modules of the battery device or more than 50% of the battery modules of the battery device are of identical design, preferably more than 80% of the battery modules.

[0107] For example, it is conceivable that all battery modules of the battery device are identical except for one battery module.

[0108] In particular, all frame elements of the battery modules of the battery device are identically designed.

[0109] In one embodiment of the battery device, it is provided that a respective battery module comprises a propagation protection element.

[0110] By providing a propagation protection element, propagation of a thermal runaway from battery cells of one battery module to battery cells of an adjacent battery module can preferably be prevented.

[0111] It may be advantageous if a propagation protection element of a respective battery module comprises or is formed from a heat-resistant and / or thermally insulating material, for example rock wool fleece and / or glass fiber fleece.

[0112] For example, it is conceivable that a propagation protection element of a battery module is connected, for example glued, to the base element of the respective battery module.

[0113] It may be advantageous, for example, if a propagation protection element of a battery module is arranged on a side of the base element facing away from the receiving space of the battery module.

[0114] In particular, it is conceivable that the propagation protection element of a battery module limits the receiving space of an adjacent battery module.

[0115] In one embodiment of the battery device, it is provided that the battery device comprises one or more temperature control elements, each of which is arranged between two adjacent battery modules.

[0116] It may be advantageous, for example, if the one or more temperature control elements, which are each arranged between two adjacent battery modules, comprise or are formed by electrical resistance heating elements.

[0117] Preferably, a temperature control element comprising or formed by an electrical resistance heating element forms a propagation protection element. It may be particularly advantageous if a temperature control element comprising or formed by an electrical resistance heating element comprises a heat-resistant material.

[0118] Alternatively or additionally, it is conceivable that the one or more temperature control elements, which are each arranged between two adjacent battery modules, comprise one or more temperature control channels through which a temperature control medium, for example a cooling or heating liquid, can be conducted.

[0119] It may be advantageous, for example, if the one or more temperature control elements, each arranged between two adjacent battery modules, are manufactured using a roll bonding process.

[0120] It is conceivable that a temperature gradient develops from the "core" of a battery module to the frame element of the battery module. In particular, it is conceivable that battery cells in the core of the battery module have a higher temperature than battery cells in an edge region of the battery module, which is bounded by the frame element of the battery module.

[0121] The maximum possible charging current is limited by a temperature gradient within the battery module and / or by temperature differences between the battery cells within a battery module. For example, battery cells within a battery module heat up first in the core of the battery module and only then in an edge area of ​​the battery module.

[0122] For example, it is conceivable that battery cells in different sections arranged one inside the other, starting from a core of the battery module, each have an at least approximately identical temperature, which increases from the core of the battery module to an edge region of the battery module.

[0123] It may therefore be advantageous if the one or more temperature control elements, which are each arranged between two adjacent battery modules, each comprise two or more than two temperature control zones in which different temperatures can be set.

[0124] For example, it is conceivable that the one or more temperature control elements, which are each arranged between two adjacent battery modules, comprise a radially inner temperature control zone and a radially outer temperature control zone which surrounds the radially inner temperature control zone, wherein the one or more temperature control elements in the radially outer temperature control zone have a higher area-related heating power than in the radially inner temperature control zone.

[0125] Preferably, the one or more tempering elements have a cross section taken perpendicular to a stacking direction of the battery device, which cross section substantially corresponds to a cross section of a receiving space of the battery modules of the battery device taken perpendicular to the stacking direction of the battery device.

[0126] Alternatively or additionally, it is conceivable that each individual battery cell of a battery module is assigned a separate temperature control element.

[0127] It may also be advantageous if a temperature control element is assigned to each group of battery cells of a battery module, in particular to a group of battery cells arranged in specific sections.

[0128] Tempering elements are, for example, heating foils and comprise one or more resistance heating elements.

[0129] Preferably, by providing a temperature control element with multiple temperature control zones or by providing multiple temperature control elements, selective heating of individual battery cells, in particular individual groups of battery cells, can be enabled. Preferably, the temperatures of the battery cells of a battery module can be made uniform.

[0130] Preferably, by equalizing the temperatures of the battery cells of a battery module, a higher maximum charging current and thus in particular a shortening of the charging time can be achieved.

[0131] In particular, a more uniform discharge of the battery cells of a battery module can be achieved.

[0132] In one embodiment of the battery device, it is provided that the frame element and / or the base element are made in particular in one piece from a metallic material, for example from aluminum.

[0133] In particular, it is conceivable that the frame element and / or the floor element are made of a metallic material with a high thermal conductivity, for example of a metallic material with a thermal conductivity of at least approximately 130 W / m*K, preferably of at least approximately 160 W / m*K.

[0134] For example, it can be advantageous if the frame element and the base element are a one-piece die-cast aluminum part.

[0135] Alternatively, it is conceivable that each floor element is integrally connected to a frame element, in particular welded, for example by means of friction stir welding.

[0136] By bonding the floor element and the frame element together, a thermal and / or mechanical coupling of the floor element and the frame element can preferably be achieved.

[0137] In particular, metallic heat conduction from the floor element into the frame element can be realized.

[0138] If the frame element is made of a metallic material, it can be provided that the frame element comprises one or more heat-conducting elements, in particular one or more cooling fins, which are arranged in particular on an outer surface of the frame element.

[0139] A ratio of an outer surface of the frame member to an inner surface of the frame member is preferably at least about 1.3:1, preferably at least about 1.5:1.

[0140] In one embodiment of the battery device, it is provided that the frame element is made of a plastic material and / or that the base element is made of a metallic material.

[0141] If the frame element is made of a plastic material, the frame element is preferably injection-molded.

[0142] It can be particularly advantageous if the frame element is a plastic injection-molded component.

[0143] Heat can preferably be conducted away from the battery cells of a battery module by means of a metallic base element.

[0144] The base elements of the battery modules are preferably aluminum plates.

[0145] It may be advantageous if the base elements of the battery modules comprise or are formed from an aluminum alloy having a thermal conductivity of at least approximately 130 W / m*K, preferably of at least approximately 160 W / m*K.

[0146] Preferably, the base elements of the battery modules comprise or are formed from AlMgSi0.5.

[0147] It may be particularly advantageous if the base elements have an average material thickness in the range of approximately 2 mm to approximately 6 mm, for example approximately 4 mm, parallel to a stacking direction of the battery device.

[0148] Preferably, the vibration resistance of the battery modules of the battery device can be increased. In particular, the temperatures of the battery cells of a respective battery module can be made uniform.

[0149] In one embodiment of the battery device, it is provided that a respective battery module comprises electrical contacting elements by means of which two adjacent battery modules can be connected to one another in series by stacking the battery modules along the stacking direction.

[0150] Preferably, a respective battery module comprises a first contacting element and a second contacting element, wherein the first and the second contacting element are arranged on opposite sides of the battery module in the stacking direction.

[0151] It may be particularly advantageous if the first contacting element and the second contacting element of a respective battery module are arranged such that the first contacting element of a first battery module of two adjacent battery modules and the second contacting element of a second battery module of the two adjacent battery modules are in electrically conductive contact with one another.

[0152] In one embodiment of the battery device, it is provided that a respective battery module comprises one or more spacer elements by means of which the base elements of the battery modules are arranged or can be arranged substantially parallel to one another.

[0153] The spacer elements preferably comprise or are formed from a metallic material.

[0154] It may be advantageous, for example, if a spacer element of a respective battery module is formed by the frame element of the battery module, in particular if the frame element is made of a metallic material.

[0155] Alternatively, it is possible for a respective battery module to comprise several, preferably at least three, spacer elements which are inserted into a frame element of the battery module.

[0156] In one embodiment of the battery device, it is provided that a respective battery module comprises a detection device for detecting the cell voltages of the battery cells of the battery module and / or for detecting the temperatures of the battery cells of the battery module and / or that a respective battery module comprises a balancer for balancing the battery cells of the battery module.

[0157] It may be advantageous if the frame element of a respective battery module comprises or is formed from a plastic material.

[0158] Preferably, frame elements comprising or formed from a plastic material can reduce an overall mass of the battery device and / or the manufacturing costs of the battery device.

[0159] In one embodiment of the battery device, it is provided that the frame element is an injection-molded component, in particular a plastic injection-molded component.

[0160] Preferably, the frame element is a one-piece plastic injection-molded component.

[0161] In one embodiment of the battery device, it is provided that the frame element comprises a double wall, in particular a ring-shaped closed double wall.

[0162] The double wall preferably comprises an inner wall element and an outer wall element.

[0163] The inner wall element and / or the outer wall element are preferably formed in a closed ring shape.

[0164] Preferably, by providing the outer wall element and / or the inner wall element, a closed shell for the battery cells of a respective battery module can be provided even if the outer wall element fails, for example in the event of a crash.

[0165] For example, it is conceivable that the inner wall element and / or the outer wall element are arranged substantially parallel to one another.

[0166] Opposite wall sections of the inner wall element and the outer wall element are connected to one another in particular by means of one or more connecting webs.

[0167] It can be advantageous if the connecting webs run parallel to a stacking direction of the battery device.

[0168] Preferably, the inner wall element and the outer wall element are connected to one another by means of several connecting webs.

[0169] For example, the connecting bridges are arranged at regular intervals from one another.

[0170] By providing a double wall through which a temperature control medium can flow, the following advantages can preferably be achieved: fire protection by wetting the outer wall element and / or the inner wall element with temperature control medium, improved propagation protection, increased electromagnetic compatibility (EMC); improved mechanical strength; temperature control of the battery cells of a battery module.

[0171] By wetting the outer wall element and / or the inner wall element with tempering medium, burning or melting of the frame element can preferably be made more difficult, delayed and / or prevented.

[0172] For example, electromagnetic compatibility can be increased by flowing an electrically conductive temperature control medium through a double wall of a frame element of a respective battery module.

[0173] In order to increase electromagnetic compatibility, it can further be provided that the frame element of a respective battery module is coated, in particular vapor-deposited, with a metallic material.

[0174] In particular, an outer surface and / or an inner surface of the frame element can be coated, in particular vapor-deposited, with a metallic material.

[0175] It may be advantageous if the temperature control chamber of a battery module is delimited in the stacking direction by the base element of the battery module and by a base element of an adjacent battery module.

[0176] Preferably, the base element of a battery module comprises one or more passage openings which open into the temperature control chamber of a battery module.

[0177] In one embodiment of the battery device, it is provided that the double wall of the frame element can be flowed through by a temperature control medium, in particular parallel to a stacking direction of the battery device.

[0178] In one embodiment of the battery device, it is provided that the double wall of the frame element delimits a temperature control chamber of the respective battery module, preferably at least on two sides.

[0179] Preferably, the temperature control chamber is closed in a ring shape.

[0180] The temperature control chamber of a respective battery module preferably has a temperature control chamber contour in a cross section taken perpendicular to a stacking direction of the battery device.

[0181] It can be advantageous if the temperature control chamber is partially delimited by the base element of a respective battery module.

[0182] In particular, it can be provided that the temperature control chamber is delimited on two sides by the double wall of the frame element. Preferably, the temperature control chamber is further delimited on a first side of the frame element in the stacking direction by the base element of a respective battery module. It can also be advantageous if the temperature control chamber is delimited on a second side of the frame element in the stacking direction, which side faces away from the first side of the frame element, by a base element of an adjacent battery module.

[0183] It may be particularly advantageous if the temperature control chamber, with the exception of passage openings, is delimited by the base element of a respective battery module and by a base element of an adjacent battery module.

[0184] In one embodiment of the battery device, it is provided that the base element of a respective battery module comprises one or more passage openings which open in particular into a temperature control chamber of the battery module.

[0185] It can be advantageous if the temperature control chambers of adjacent battery modules are fluidically connected to each other, in particular by means of the passage openings of the base element.

[0186] For example, it is conceivable that the passage openings are circular.

[0187] In order to be able to improve the dissipation of heat from a base element of a battery module into a temperature control medium flowing through the temperature control chamber, it can be provided that the passage openings have an opening cross-section in which a ratio of the surface area of ​​a wall of a respective passage opening to the opening cross-section of the same is as large as possible.

[0188] For example, it is conceivable that the passage openings have a square or a star-shaped cross-section.

[0189] Preferably, the base element of a respective battery module comprises a plurality of through-openings which are arranged substantially along a line.

[0190] The passage openings are preferably arranged at regular intervals along the line.

[0191] It may be particularly advantageous if the passage openings of the base element are arranged along a line which runs along a temperature control chamber contour of the temperature control chamber of a respective battery module.

[0192] Preferably, a sealing section of a sealing element is arranged radially inside a line along which the passage openings are arranged and radially outside the line along which the passage openings are arranged.

[0193] The sealing sections of the sealing element are preferably closed in a ring shape and in particular run substantially parallel to the line along which the passage openings are arranged.

[0194] It may be advantageous if the passage openings which open into the temperature control chamber of a battery module form temperature control medium inlets and / or temperature control medium outlets, by means of which temperature control medium can be introduced into and / or led out of a temperature control chamber of a battery module.

[0195] In one embodiment of the battery device, it is provided that a respective battery module comprises two sealing elements, wherein a first sealing element is arranged between the frame element and the base element of the battery module and / or wherein a second sealing element is arranged between the frame element and a base element of an adjacent battery module.

[0196] It can be advantageous if the sealing elements are molded onto the base element and / or the frame element of a respective battery module.

[0197] It may also be advantageous if a sealing element is injection-molded onto the frame element during its manufacture.

[0198] Alternatively or additionally, it is possible for one or more sealing elements to be molded onto the base element when a holding body is molded onto the base element.

[0199] For example, it is conceivable that a sealing element is molded onto the floor element on opposite sides of the floor element.

[0200] Furthermore, it is conceivable for a sealing element to be manufactured independently of the frame element and / or independently of a retaining body. Preferably, a sealing element manufactured independently of the frame element and / or independently of the retaining body is inserted into sealing element receiving grooves of the frame element.

[0201] A sealing element preferably comprises a first sealing portion and a second sealing portion.

[0202] The first sealing section and / or the second sealing section are preferably closed in a ring shape.

[0203] The first sealing section and the second sealing section of the sealing element preferably each comprise a sealing lip.

[0204] It may be advantageous if the first sealing section and the second sealing section are connected to one another, for example by means of one or more web elements.

[0205] The sealing elements are preferably formed in one piece.

[0206] Alternatively, it is conceivable that the sealing elements are formed in several parts and the first sealing section and the second sealing section are not connected to each other.

[0207] In one embodiment of the battery device, it is provided that a respective battery module comprises one or more spacer elements by means of which the base elements of the battery modules are arranged or can be arranged substantially parallel to one another.

[0208] It can be advantageous if one or more spacer elements of a battery module are designed to be pressure-stable.

[0209] The one or more spacer elements of a battery module have, in particular, a higher pressure stability than the frame element of the battery module.

[0210] The spacer elements preferably comprise or are formed from a metallic material.

[0211] For example, it is conceivable that a respective battery module comprises several, preferably at least three, spacer elements which are inserted into the frame element of the battery module.

[0212] For example, it is further conceivable that the frame element of a respective battery module comprises one or more receptacles, wherein a spacer element is preferably arranged in each receptacle.

[0213] Preferably, the spacer elements are substantially cylindrical.

[0214] It may be advantageous if the spacer elements of a respective battery module are arranged outside the double wall of the frame element of the battery module in a direction perpendicular to a stacking direction of the battery module.

[0215] Preferably, spacer elements of two adjacent battery modules are aligned in a stacking direction of the battery device.

[0216] In one embodiment of the battery device, it is provided that the one or more spacer elements of a respective battery module each comprise two contact surfaces arranged on opposite sides of the spacer element, wherein a respective spacer element bears against the base element of the battery module with a first contact surface and wherein the spacer element bears against the base element of an adjacent battery module with a second contact surface or can be placed against it.

[0217] Preferably, a force introduction from the spacer elements into the floor elements can be realized.

[0218] In particular, a compressive force can be transferred from the spacer elements to floor elements resting on the contact surfaces of the spacer elements.

[0219] In one embodiment of the battery device, it is provided that the two contact surfaces of a spacer element of a respective battery module are spaced apart from one another by a distance which essentially corresponds to a height of a wall, in particular a double wall, of the battery module taken parallel to the stacking direction.

[0220] Preferably, it can be prevented that the frame elements of the battery modules, which comprise or are formed from a plastic material, are compressed due to a clamping force acting on the battery modules parallel to a stacking direction of the battery device.

[0221] In one embodiment of the battery device, it is provided that the spacer elements of a respective battery module are bolt elements or sleeve elements.

[0222] For example, it is conceivable that the spacer elements of a respective battery module are substantially circular or annular in a cross section taken perpendicular to a stacking direction of the battery module.

[0223] Spacer elements designed as sleeve elements are preferably hollow cylindrical.

[0224] It may be advantageous if the spacer elements are rotationally symmetrical to a longitudinal axis thereof.

[0225] For example, it is conceivable that the spacer elements comprise a spacer section in which the spacer elements are formed in particular cylindrically, for example circularly cylindrically.

[0226] It may also be advantageous if the spacer elements further comprise an insertion section in which the spacer elements are formed in particular cylindrically, for example circularly cylindrically.

[0227] An insertion portion of a spacer element is preferably insertable into a spacer portion of a spacer element adjacent in a stacking direction of the battery device.

[0228] In one embodiment of the battery device, it is provided that the battery modules of the battery device are clamped together by means of the spacer elements or that the battery modules of the battery device are clamped by means of clamping elements guided through the spacer elements.

[0229] For example, it is conceivable that the spacer elements each comprise screw elements, wherein adjacent spacer elements in a stacking direction of the battery device can be screwed together by means of the screw elements.

[0230] For example, it is conceivable that an insertion section of a spacer element comprises an external thread and / or that a spacer section of a spacer element comprises an internal thread.

[0231] Alternatively, it is conceivable that clamping elements of the battery device are guided through spacer elements designed as sleeve elements.

[0232] It may be advantageous if the battery modules of the battery device are clamped or can be clamped between two end bodies by means of one or more clamping elements.

[0233] Preferably, the battery modules of the battery device are pressed together before being clamped together, in particular in a stacking direction of the battery device.

[0234] It can be advantageous if, when the battery modules are pressed together, sealing elements of the battery modules between a frame element and a base element are deformed, in particular compressed.

[0235] In one embodiment of the battery device, it is provided that the frame element of a respective battery module comprises one or more stacking projections projecting away from the frame element parallel to a stacking direction of the battery device and / or one or more stacking recesses in which stacking projections of a frame element of an adjacent battery module can be received.

[0236] Preferably, stacking of the battery modules of the battery device can be facilitated by means of the stacking projections and / or by means of the stacking recesses.

[0237] Preferably, the stacking projections and the stacking recesses of the frame element of a respective battery module are arranged on opposite sides of the frame element.

[0238] In particular, it can be provided that all stacking projections of the frame element of a respective battery module are arranged on a first side of the frame element and that all stacking recesses are arranged on a second side of the frame element, which is facing away from the first side.

[0239] In one embodiment of the battery device, it is provided that the frame element of a respective battery module is connected or connectable to the base element of the battery module in a force-locking and / or form-locking manner, for example by clipping.

[0240] The frame element of a respective battery module preferably comprises one or more locking projections.

[0241] It may be advantageous if the base element of a respective battery module comprises one or more locking recesses into which the locking projections of the frame element can be inserted.

[0242] The one or more locking projections of a frame element of a respective battery module preferably each comprise two locking elements.

[0243] In particular, it is conceivable that a locking element of a locking projection comprises a locking hook.

[0244] The locking hooks of the two locking elements of a locking projection preferably engage behind the base element of a respective battery module when the frame element is connected to the base element in a force-locking and / or form-locking manner, in particular clipped.

[0245] In one embodiment of the battery device, it is provided that the frame element of a respective battery module comprises a stiffening structure, for example a stiffening rib structure, on a peripheral surface of the frame element.

[0246] Preferably, the stiffness of an injection-molded frame element can be increased by means of the stiffening structure.

[0247] In particular, it is conceivable that a stiffening rib structure of the frame element comprises several rib elements.

[0248] In one embodiment of the battery device, it is provided that individual or several, in particular all, battery modules of the battery device are designed identically.

[0249] It may be particularly advantageous if the frame elements and / or the base elements of all battery modules of the battery device are of identical design.

[0250] It may be advantageous if the base element of a respective battery module comprises or is formed from a metallic material and forms part of an outer surface of the battery device.

[0251] It may be particularly advantageous if the base element forms a ring-shaped closed part of an outer surface of the battery device.

[0252] Preferably, heat can be dissipated to the outer surface of the battery device by means of the bottom element of a respective battery module.

[0253] Preferably, passive temperature control of the battery device can be realized by means of the base elements.

[0254] In the context of this description and the appended claims, passive temperature control is understood to mean, in particular, temperature control which is essentially based on heat conduction.

[0255] The base elements of the battery modules each form, in particular, annularly closed surface sections of an outer surface of the battery device.

[0256] Preferably, the annularly closed surface sections formed by the base elements of the battery modules are separated from one another in the stacking direction by the frame elements of the battery modules.

[0257] Preferably, since the base element of a respective battery module forms part of an outer surface of the battery device, heat dissipation to an outer surface of the battery device can be realized by means of the base element.

[0258] Perpendicular to a stacking direction of the battery device, an outer surface is preferably formed by annularly closed surface sections formed by the base elements of the battery modules and by the frame elements of the battery modules.

[0259] Preferably, the floor element has a thermal conductivity of at least approximately 100 W / m*K, for example of at least approximately 150 W / m*K.

[0260] For example, it can be advantageous if the floor element has a thermal conductivity of approximately 186 W / m*K.

[0261] The base element comprises in particular aluminum or is formed from it, for example AlMgSi0.5.

[0262] Preferably, the battery modules of the battery device are arranged or can be arranged along a stacking direction.

[0263] In particular, it is conceivable that the base element of a respective battery module forms part of the outer surface of the battery module in a direction perpendicular to the stacking direction.

[0264] In one embodiment of the battery device, it is provided that the base elements of the battery modules protrude perpendicular to a stacking direction of the battery device at least in sections, for example in a closed ring shape, beyond the frame elements of the battery modules.

[0265] In one embodiment of the battery device, it is provided that the battery device comprises a heat sink and / or a temperature control element, which are thermally coupled to individual or several, preferably to all, base elements of the battery device.

[0266] Preferably, the heat sink and / or the temperature control element are arranged on the outer surface of the battery device.

[0267] The heat sink preferably comprises one or more cooling fins.

[0268] It may be advantageous if the heat sink is in direct material contact with one or more, preferably with all, base elements of the battery device, in particular on the part of the outer surface of the battery device which is formed by the respective base elements of the battery modules.

[0269] In one embodiment of the battery device, it is provided that a respective battery module further comprises a holding body for holding the battery cells of the respective battery module, which holding body is connected to the base element of the battery module, in particular in a materially bonded manner.

[0270] In one embodiment of the battery device, it is provided that the holding body of a respective battery module comprises a plurality of receiving openings in each of which a battery cell of the battery module is received.

[0271] For example, it is conceivable that the holding body of a respective battery module comprises approximately 200 to approximately 600 receiving openings, for example approximately 400 receiving openings.

[0272] In one embodiment of the battery device, it is provided that the holding body of a respective battery module comprises a honeycomb structure or is formed by a honeycomb structure.

[0273] It may be advantageous if a honeycomb structure of the holding body comprises several, in particular polygonal, holding elements which delimit the receiving openings.

[0274] The holding elements are, for example, regular hexagons.

[0275] For example, it is conceivable that the holding elements are each arranged adjacent to several other holding elements.

[0276] In particular, it is conceivable that holding elements of the honeycomb structure are each arranged adjacent to six further holding elements.

[0277] Preferably, a receiving opening of a holding element is delimited by a plurality of holding element webs, for example by six holding element webs each.

[0278] It can be advantageous if several retaining element webs of adjacent retaining elements are connected to each other at a node.

[0279] It can be advantageous, for example, if three holding elements of three adjacent holding elements are connected to each other at the node.

[0280] In one embodiment of the battery device, it is provided that the holding body of a respective battery module is injection-molded onto the base element of the battery module.

[0281] Preferably, the holding body comprises connecting regions arranged at a plurality of nodes, at which the holding body is connected to the floor element, for example by means of a material bond.

[0282] It can be advantageous, for example, if the holding body is molded onto the floor element at the connecting areas.

[0283] For example, it may be advantageous if a connecting area is arranged at approximately 50% of the nodes of the holding body.

[0284] In one embodiment of the battery device, it is provided that the holding body is formed in one piece.

[0285] The holding body is preferably an injection-molded component, in particular a one-piece injection-molded component.

[0286] Preferably, the holding body comprises or is formed from a plastic material.

[0287] In one embodiment of the battery device, it is provided that a respective battery module further comprises a sealing element, in particular two sealing elements, which are connected to the base element of the battery module, in particular in a materially bonded manner.

[0288] It can be advantageous if the sealing element, in particular the two sealing elements, are injection-molded onto the base element.

[0289] It may be advantageous if the sealing element, in particular the two sealing elements, are each designed to be closed in a ring shape.

[0290] A sealing contour of the sealing element preferably corresponds to a contour of the frame element of a respective battery module, in particular in a cross-section taken perpendicular to a stacking direction of the battery module.

[0291] In one embodiment of the battery device, it is provided that the two sealing elements are arranged on two opposite sides of the base element of a respective battery module, in particular are injection-molded onto the base element.

[0292] In one embodiment of the battery device, it is provided that the sealing element comprises a first sealing section and a second sealing section.

[0293] A first sealing section and a second sealing section are preferably each formed in a closed ring shape.

[0294] It may be advantageous if the first sealing section and the second sealing section of the sealing element are arranged substantially parallel to one another.

[0295] In one embodiment of the battery device, it is provided that the battery cells of a respective battery module are thermally coupled to the base element of the battery module.

[0296] It may be advantageous, for example, if the battery cells of a respective battery module are thermally coupled to the base element of the battery module by means of a thermally conductive paste and / or a potting compound.

[0297] In one embodiment of the battery device, it is provided that the base element of a respective battery module comprises one or more temperature control channels, for example a temperature control channel structure.

[0298] A temperature control channel, in particular a temperature control channel structure, of the base element can preferably be flowed through by means of a temperature control medium.

[0299] For example, it is conceivable that the base element of a respective battery module is formed in multiple layers and delimits a temperature control channel, in particular a temperature control channel structure.

[0300] A temperature control channel, in particular a temperature control channel structure, of the base element of a respective battery module is produced, for example, by means of roll bonding.

[0301] It may be advantageous if, by providing a temperature control channel in the base element of a respective battery module, active temperature control of the battery device can be achieved by means of the base element.

[0302] In one embodiment of the battery device, it is provided that the base element of a respective battery module is a hybrid component, in particular a metal-elastomer hybrid component.

[0303] The present invention is based on the further object of providing a method for fixing battery cells, by means of which a battery device can be produced simply and inexpensively.

[0304] This object is achieved by a method for fixing battery cells according to the independent method claim.

[0305] The method according to the invention for fixing battery cells preferably has one or more of the features and / or advantages described in connection with the battery device according to the invention.

[0306] The method for fixing battery cells preferably comprises the following: Providing a layer element; providing a plurality of battery cells; fixing the battery cells in the layer element, in particular by plastically deforming the layer element.

[0307] It may be advantageous if the layer element, in particular plastically deformed, forms a holding body of a battery module.

[0308] Preferably, the layer element is a hot-formable layer element.

[0309] The battery cells are particularly round cells.

[0310] The layer element preferably comprises or is formed from a plastic material.

[0311] It may be advantageous, for example, if the layer element comprises or is formed from a polyolefin, for example polyethylene (PE) or polypropylene (PP).

[0312] Preferably, the layer element comprises a low-density polyethylene (LDPE).

[0313] The layer element is in particular a shrink film.

[0314] It may be advantageous if the layer element comprises or is formed from an electrically insulating material.

[0315] Furthermore, it is conceivable, for example, that the layer element comprises or is formed from polymethyl methacrylate (PMMA) or polycarbonate (PC).

[0316] In one embodiment of the method, it is provided that the battery cells are fixed in the layer element by heating the layer element and / or by subsequently cooling the layer element.

[0317] It may be advantageous if the layer element rests against a lateral surface and / or a base surface of a respective battery cell after the battery cells have been fixed in the layer element.

[0318] In particular, it can be provided that the layer element rests on a lateral surface of a respective battery cell to a maximum of approximately 50%.

[0319] Preferably, the layer element is in contact with a lateral surface of a respective battery cell to an extent of at least approximately 10%, for example to an extent of at least approximately 20%, preferably to an extent of at least approximately 30%.

[0320] It may also be advantageous if the layer element lies completely against the entire base area of ​​a respective battery cell.

[0321] After the battery cells have been fixed, the layer element preferably lies in a pot-shaped manner on the battery cells.

[0322] In one embodiment of the method, it is provided that the layer element is plastically deformed by heating or that the layer element is heated and the heated layer element is subsequently plastically deformed.

[0323] For example, it is conceivable that the layer element, which is particularly hot-formable, can only be formed after it has been heated.

[0324] In one embodiment of the method, it is provided that the layer element is cooled after heating.

[0325] Preferably, the layer element solidifies after cooling.

[0326] The cooled layer element is preferably substantially rigid.

[0327] In one embodiment of the method, the layer element is shrunk onto the battery cells.

[0328] Preferably, the layer element is shrunk onto only a portion of the battery cells.

[0329] In particular, the battery cells are not completely surrounded by the layer element.

[0330] It may be advantageous, for example, if the layer element is only shrunk onto the first side of the battery cells in the direction of the longitudinal axes of the battery cells.

[0331] For example, it can be provided that the layer element is shrunk onto the battery cells to a maximum of approximately 50% of a length of a respective battery cell.

[0332] In the context of this description and the appended claims, a length of the battery cells is understood to mean in particular a length of the battery cells in a direction parallel to a longitudinal axis of the battery cells.

[0333] Preferably, the layer element is shrunk onto the battery cells to at least approximately 10%, in particular to at least approximately 20%, for example to at least approximately 30%, of a length of a respective battery cell.

[0334] In one embodiment of the method, it is provided that the battery cells are aligned relative to one another before they are fixed in the layer element, in particular by means of a tool.

[0335] Preferably, the battery cells are arranged parallel to one another before they are fixed in the layer element.

[0336] In particular, the battery cells are arranged in such a way that the longitudinal axes of the battery cells are arranged parallel to one another.

[0337] It may also be advantageous if the battery cells are arranged in a predetermined pattern before they are fixed in the layer element.

[0338] In particular, it is conceivable that the battery cells are arranged in the specified pattern in several rows and several columns.

[0339] It may be advantageous, for example, if the battery cells in a row direction of the given pattern each have an identical first distance from one another.

[0340] Furthermore, it is preferably conceivable that the battery cells each have an identical second distance from one another in a column direction of the predetermined pattern.

[0341] It is appreciated that the first spacing in the row direction is smaller or larger than the second spacing in the column direction.

[0342] In one embodiment of the method, the battery cells are initially aligned parallel to one another and / or in a predetermined pattern.

[0343] The battery cells are preferably arranged parallel to each other and / or in the predetermined pattern using a tool.

[0344] The tool comprises in particular a first tool half with a negative mold in which the battery cells can be at least partially accommodated.

[0345] The first tool half is in particular a die element.

[0346] The first tool half forms in particular a shaping element.

[0347] The first tool half has in particular a negative form of the given pattern.

[0348] It may be advantageous, for example, if the first tool half comprises several positioning openings, in each of which a battery cell can be accommodated for aligning the battery cells.

[0349] Preferably, the first tool half comprises a plurality of rows and a plurality of rows of positioning openings, wherein a row and / or a row each comprises a plurality of positioning openings.

[0350] For example, it is conceivable that the battery cells are arranged in the positioning openings of the first tool half by means of a positioning device, for example by means of an industrial robot.

[0351] Preferably, the layer element is deformed by positioning the layer element between the battery cells and the first tool half and then arranging the battery cells in the positioning openings of the first tool half.

[0352] Preferably, the layer element is clamped by means of the battery cells in the positioning openings of the first tool half and thereby deformed.

[0353] In particular, the layer element is clamped between a positioning opening wall and a battery cell.

[0354] The tool preferably comprises a second tool half with a negative mold in which the battery cells can be at least partially accommodated.

[0355] The first and second tool halves are preferably movable relative to each other.

[0356] Preferably, the second tool half has a negative form of the predetermined pattern.

[0357] The second tool half preferably also comprises a plurality of positioning openings, in each of which a battery cell can be received for aligning the battery cells.

[0358] It may be advantageous if the positioning openings of the first tool half and / or the second tool half are each substantially cylindrical, in particular substantially circular-cylindrical.

[0359] Preferably, an inner diameter of the positioning openings of the first tool half is larger than an outer diameter of the battery cells.

[0360] It may be advantageous, for example, if an inner diameter of the positioning openings of the first tool half is essentially the same size or smaller than the sum of an outer diameter of the battery cells and twice the material thickness of the layer element.

[0361] Preferably, the layer element and a respective battery cell can be clamped within the positioning openings of the first tool half.

[0362] It may also be advantageous if an inner diameter of the positioning openings of the second tool half essentially corresponds to an outer diameter of the battery cells.

[0363] In one embodiment of the method, it is provided that individual or multiple battery cells are moved parallel to a longitudinal axis of the battery cells after parallel alignment and / or after alignment in a predetermined pattern.

[0364] Preferably, the battery cells are moved against a stop, which is preferably arranged perpendicular to a longitudinal axis of the battery cells.

[0365] It may be particularly advantageous for the battery cells to be moved against a stop in such a way that the base surfaces of all battery cells are arranged in a single plane after the movement.

[0366] In one embodiment of the method, it is provided that individual or multiple battery cells are moved parallel to a longitudinal axis of the battery cells to such an extent that the base surfaces of all battery cells are arranged essentially in a single plane.

[0367] For example, it is conceivable that all battery cells are moved against a stop.

[0368] In particular, it can be provided that the first tool half and the second tool half are moved towards each other.

[0369] Preferably, the positioning openings of the first tool half and / or the positioning openings of the second tool half comprise a stop.

[0370] Alternatively, it is conceivable that the first or second tool half comprises a stop and that the second or first tool half comprises a movement device for moving individual or multiple battery cells, by means of which the battery cells can be moved against the stop.

[0371] It may be advantageous, for example, if the movement device comprises one or more pistons which can be displaced into positioning openings of the first or second tool half.

[0372] Alternatively, it is conceivable that the movement device comprises one or more nozzle elements which open into the positioning openings of the first or second tool half.

[0373] Preferably, the layer element and / or the battery cell arranged in a respective positioning opening of the first tool half are moved by pressurizing a pressure chamber delimited by the layer element and the positioning opening.

[0374] The present invention further relates to a battery device comprising one or more battery modules, each battery module comprising: a frame element; a base element; and a plurality of battery cells, wherein the battery cells are fixed in a layer element by the method according to the invention for fixing battery cells, and wherein the layer element and the battery cells fixed in the layer element are fixed to the base element of the battery module.

[0375] It may be particularly advantageous if the layer element in which the battery cells are fixed is integrally connected to the base element of a battery module, in particular by means of a thermally conductive paste.

[0376] After the deformation of the layer element, in particular after the cooling of the deformed layer element, the deformed layer element preferably forms a holding body by means of which the battery cells are held.

[0377] The present invention further relates to a method for producing a battery device, in particular a battery device according to the invention.

[0378] The method for manufacturing a battery device preferably comprises the following: Providing two or more than two battery modules; stacking the battery modules along a stacking direction.

[0379] It can be advantageous if the battery modules of the battery device are clamped together and / or between two end bodies.

[0380] For example, it is conceivable that two adjacent battery modules are connected and / or clamped together in layers.

[0381] The method according to the invention for producing a battery device, in particular for producing a battery device according to the invention, preferably has one or more of the features and / or advantages described in connection with the battery device according to the invention.

[0382] Further features and / or advantages of the invention are the subject of the following description and the drawings of exemplary embodiments.

[0383] The drawings show: Fig. 1 shows a schematic longitudinal section through an embodiment of a battery device comprising a plurality of battery modules; Fig. 2 shows a schematic perspective view of a section of a battery module of the battery device from Fig. 1 ; Fig. 3 an enlarged view of area III in Fig. 2 ; Fig. 4 a schematic perspective view of a partial section of a battery module of the battery device from Fig. 1 ; Fig. 5 an enlarged view of area V in Fig. 4 ; Fig. 6 a schematic plan view of a section of a battery module of the battery device from Fig. 1 ; Fig. 7 a schematic perspective view of a section of a battery module of the battery device from Fig. 1 from below; Fig. 8 a schematic perspective view of a section of a battery module of the battery device from Fig. 1 from above; Fig. 9 an enlarged view of area IX in Fig. 7 ; Fig. 10 an enlarged view of the area X in Fig. 8 ; Fig. 11 a schematic section through a battery module of the battery device from Fig. 1 along the line XI-XI in Fig. 6 ; Fig. 12 a schematic section through a battery module of the battery device from Fig. 1 along the line XII-XII in Fig. 6 ; Fig. 13 a schematic section through a battery module of the battery device from Fig. 1 along the line XIII-XIII in Fig. 6 ; Fig. 14 a schematic perspective view of a section of stacked base elements and spacer elements of a battery device from Fig. 1 ; Fig. 15 an exploded schematic perspective view of a section of the floor elements and the spacer elements from Fig. 14 ; Fig. 16 a schematic plan view of a temperature control element of a battery device from Fig. 1; Fig. 17 a schematic perspective view of a section of a further embodiment of a battery device; Fig. 18 a section of a schematic perspective view of a further embodiment of a battery device; Fig. 19 a section of a schematic perspective view of an end body of the battery device from Fig. 18 ; Fig. 20 a schematic representation of a first method step of an embodiment of a method for fixing battery cells; Fig. 21 a schematic representation of a method related to the first method step of Fig. 20 subsequent second method step of the embodiment of a method for fixing battery cells; Fig. 22 a schematic representation of a method step following the second method step of Fig. 21subsequent third method step of the embodiment of a method for fixing battery cells; Fig. 23 a schematic representation of battery cells fixed in a deformed layer element; Fig. 24 a schematic representation of the battery cells fixed in the deformed layer element, wherein the deformed layer element forms a holding body and the holding body is connected to a base element of a battery module of a battery device; and Fig. 25 an enlarged representation of the area XXV in Fig. 24 .

[0384] Identical or functionally equivalent elements are provided with the same reference numerals in all figures.

[0385] The Fig. 1 to 16 show an embodiment of a battery device designated as a whole by 100.

[0386] The battery device 100 preferably comprises a plurality of battery modules 102.

[0387] It may be advantageous if the battery modules 102 of the battery device 100 are designed to be self-supporting.

[0388] Preferably, each battery module 102 comprises a frame element 104, a base element 106 and a plurality of battery cells 108.

[0389] Preferably, individual or several, in particular all, battery modules 102 of the battery device 100 are of identical design.

[0390] In particular, it is conceivable that the frame elements 104 and / or the base elements 106 of all battery modules 102 of the battery device 100 are of identical design.

[0391] The frame elements 104 are preferably made of a plastic material, in particular injection-molded.

[0392] Preferably, the frame elements 104 are plastic injection-molded components.

[0393] It may be advantageous if the floor elements 106 are made of a metallic material.

[0394] The base elements 106 of the battery modules 102 are preferably aluminum plates. It may be particularly advantageous if the base elements 106 of the battery modules comprise or are formed from AlMgSi0.5.

[0395] By means of a metallic base element 106, heat can preferably be conducted away from the battery cells 108 of a respective battery module 102.

[0396] The battery cells 108 are preferably galvanic cells, in particular so-called secondary cells, which are preferably rechargeable.

[0397] It may be advantageous if the battery modules 102 of the battery device 100 are arranged or can be arranged along a stacking direction 110.

[0398] Preferably, the battery modules 102 comprise electrical contacting elements (not shown in the drawings) by means of which two adjacent battery modules 102 can be connected to one another in series by stacking the battery modules 102 along the stacking direction 110.

[0399] It may be advantageous if a respective battery module 102 of the battery device 100 comprises a detection device, not shown in the drawings, for detecting the cell voltages of the battery cells 108 of the battery module 102 and / or for detecting the temperatures of the battery cells 108 of the battery module 102.

[0400] It may also be advantageous if a respective battery module 102 of the battery device 100 comprises a balancer, not shown in the drawings, for balancing the battery cells 108 of the battery module 102.

[0401] For example, it is conceivable that a respective battery module 102 comprises a first contacting element and a second contacting element, wherein the first and the second contacting element are arranged on opposite sides of the battery module 102 in the stacking direction 110.

[0402] Preferably, the first contacting element and the second contacting element of a respective battery module 102 are arranged such that the first contacting element of a first battery module 102 of two adjacent battery modules 102 and the second contacting element of a second battery module 102 of two adjacent battery modules 102 are in electrically conductive contact with one another.

[0403] Preferably, the base elements 106 have an average material thickness 109 parallel to the stacking direction 110 in the range of approximately 2 mm to approximately 6 mm, for example approximately 4 mm (cf. Fig. 11 and 12 ).

[0404] The battery device 100 can preferably be arranged such that the stacking direction 110 of the battery modules 102 runs parallel to the direction of gravity G. The battery device 100 is arranged in particular "upright" (cf. Fig. 1 ).

[0405] Alternatively, it is conceivable that the battery device 100 can be arranged such that the stacking direction 110 of the battery modules 102 runs substantially perpendicular to the direction of gravity G. The battery device 100 is arranged in particular "lying".

[0406] A battery module 102 preferably includes at least approximately 50 battery cells 108.

[0407] For example, it is conceivable that a battery module 102 comprises approximately 200 to approximately 600 battery cells 108, for example approximately 400 battery cells 108.

[0408] Preferably, the frame elements 104 of the battery modules 102 are formed in a closed ring shape.

[0409] Preferably, the frame elements 104 of the battery modules 102 comprise an annularly closed wall 111. The frame element 104 comprises, for example, a connecting web (not shown in the drawings), which is arranged between two opposing wall sections of the wall 111 of the frame element 104 and connects them to one another.

[0410] It may be advantageous if the frame element 104 and the base element 106 of a respective battery module 102 define a particularly pot-shaped receiving space 112 in which the battery cells 108 of the respective battery module 102 are received.

[0411] The receiving space 112 of a battery module 102 is preferably delimited by the frame element 104 and by the base element 106 of the battery module 102 as well as by the base element 106 of an adjacent battery module 102.

[0412] The frame element 104 of a respective battery module 102 preferably surrounds all battery cells 108 of the battery module 102, in particular in a direction perpendicular to the stacking direction 110.

[0413] The frame elements 104 of the battery modules 102 preferably form housing sections 114 of the battery device 100.

[0414] The frame elements 104 of the battery modules 102 together form, in particular, an outer skin 116 of the battery device 100.

[0415] In particular, it can be provided that a surface of the wall 111 of the respective frame element 104 forms part of a surface of a housing 118 of the battery device 100.

[0416] The frame elements 104 of the battery modules 102 of the battery device 100 are thus preferably not delimited by an additional housing in a radial direction running perpendicular to the stacking direction 110.

[0417] Preferably, the manufacturing costs of the battery device 100 can be reduced by eliminating an additional housing.

[0418] It may be advantageous if the surface of the wall 111 of the frame element 104 of a respective battery module 102 is coated, in particular vapor-deposited, with a metallic material. This preferably increases the electromagnetic compatibility of the battery device 100.

[0419] In the Fig. 1 to 16 In the embodiment of the battery device 100 shown, a respective frame element 104 comprises in particular a double wall 120 which comprises an inner wall element 122 and an outer wall element 124.

[0420] It may be advantageous if longitudinal axes 126 of the battery cells 108 of the battery modules 102 are arranged substantially parallel to the stacking direction 110 of the battery modules 102.

[0421] Preferably, by arranging the longitudinal axes 126 of the battery cells 108 of the battery modules 102 parallel to the stacking direction 110 of the battery modules 102, an outer contour of the frame elements 104 of the battery modules 102 can be optimally adapted to an available installation space, for example in a vehicle.

[0422] In particular, the available installation space, for example in a vehicle, can be optimally utilized.

[0423] It may be advantageous if a degree of filling of the receiving space 112 of the battery modules 102 of the battery device 100 can be increased by arranging the longitudinal axes 126 of the battery cells 108 parallel to the stacking direction 110 of the battery modules 102.

[0424] Preferably, by increasing the degree of filling, an energy storage capacity of the battery modules 102 and in particular of the battery device 100 can be increased.

[0425] To increase the filling level, the battery cells 108 can be round cells. The battery cells 108 are, in particular, designed to be at least approximately rotationally symmetrical to the longitudinal axis 126.

[0426] By using round cells, the receiving space 112 of the battery modules 102 can preferably be filled at least approximately completely.

[0427] The inner wall element 112 and / or the outer wall element 124 of the double wall 120 are preferably formed in a closed ring shape.

[0428] Preferably, by providing the outer wall element 124 and / or the inner wall element 122, a closed shell for the battery cells 108 of a respective battery module 102 can be provided even if the outer wall element 124 fails, for example in the event of a crash.

[0429] The inner wall element 122 and / or the outer wall element 124 are preferably arranged substantially parallel to one another.

[0430] Opposite wall sections of the inner wall element 122 and the outer wall element 124 are connected to one another in particular by means of several connecting webs 128 (cf. Fig. 3 and 5 ).

[0431] Preferably, the connecting webs 128 run parallel to the stacking direction 110 of the battery device 100.

[0432] It may be advantageous if the connecting webs 128 are arranged at regular intervals from one another, for example.

[0433] The double wall 120 of the battery modules 102 can preferably each have a temperature control medium flowing through it, in particular parallel to the stacking direction 110 of the battery device 100. By flowing a temperature control medium through the double wall 120, battery cells 108 of the battery modules 102 can preferably be temperature controlled.

[0434] Preferably, by providing the double wall 120 through which a temperature control medium can flow, fire protection and / or improved propagation protection of the battery device 100 can be realized, in particular by wetting the outer wall element 124 and / or the inner wall element 122 with temperature control medium.

[0435] By wetting the outer wall element 124 and / or the inner wall element 122 with tempering medium, burning or melting of the frame element 104 can be made more difficult, delayed and / or prevented.

[0436] Preferably, by providing the double wall 120 through which a temperature control medium can flow, the electromagnetic compatibility (EMC) of the battery device 100 can also be increased, in particular if the double wall 120 is flowed through by an electrically conductive temperature control medium.

[0437] It may also be advantageous if the double wall 120 can provide increased mechanical strength of the frame element 104.

[0438] The double wall 120 of the frame element 104 preferably delimits a temperature control chamber 130 of the respective battery module 102, preferably at least on two sides (cf. Fig. 11 ). The temperature control chamber 130 is preferably closed in a ring shape.

[0439] The temperature control chamber 130 of a respective battery module 102 is preferably further delimited in the stacking direction 110 by the base element 106 of the battery module 102 and by a base element 106 of an adjacent battery module 102 (cf. Fig. 1 ).

[0440] The base element 106 of a battery module 102 preferably comprises one or more passage openings 132 which open into the temperature control chamber 130 of the battery module 102.

[0441] The passage openings 132 are, for example, circular.

[0442] For reasons of clarity, the Fig. 3 and 5 only individual passage openings 132 are marked with a reference symbol.

[0443] The temperature control chamber 130 is preferably completely delimited, with the exception of the passage openings 132, by the inner wall element 122, the outer wall element 124, by the base element 106 of the respective battery module 102 and by a base element 106 of an adjacent battery module 102.

[0444] The temperature control chamber 130 of a respective battery module 102 preferably has a temperature control chamber contour in a cross section taken perpendicular to the stacking direction 110 of the battery device 100.

[0445] The temperature control chambers 130 of adjacent battery modules 102 are preferably fluidically connected to one another, in particular by means of the passage openings 132 of the base element 106 of the battery modules 102.

[0446] The passage openings 132 form, in particular, temperature control medium inlets and / or temperature control medium outlets, by means of which temperature control medium can be introduced into the temperature control chamber 130 of a respective battery module 102 and / or can be led out of it.

[0447] A temperature control chamber 130 forms in particular a temperature control channel 135 of a temperature control device 137 of a respective battery module 102.

[0448] It may be advantageous if the through-openings 132 are arranged substantially along a line. The through-openings 132 are preferably arranged at regular intervals from one another along the line. In particular, it may be provided that the through-openings 132 of the base element 106 are arranged along a line that runs along the contour of the temperature control chamber 130 of a respective battery module 102.

[0449] A respective battery module 102 of the battery device 100 preferably comprises two sealing elements 134.

[0450] By means of the sealing elements 134 of the battery modules 102, for example, a sealing effect according to protection class IP 6K9K can be achieved.

[0451] Preferably, a first sealing element 134 is arranged between the frame element 104 and the base element 106 of a battery module 102.

[0452] It may be advantageous if a second sealing element 134 is arranged between the frame element 104 and a base element 106 of an adjacent battery module 102.

[0453] It may be advantageous, for example, if a sealing element 134 is injection-molded onto the frame element 104 during the manufacture of the frame element 104.

[0454] Alternatively or additionally, it is possible for one or more sealing elements 134 to be injection-molded onto the base element 106, while a retaining body, which will be described later, is injection-molded onto the base element 106.

[0455] For example, it is conceivable that a sealing element 134 is molded onto the base element 106 on opposite sides of the base element 106.

[0456] Alternatively, it is conceivable that a sealing element 134 is manufactured independently of the frame element 104 and / or independently of the retaining body to be described below. Preferably, a sealing element 134 manufactured independently of the frame element 104 and / or independently of the retaining body is inserted into sealing element receiving grooves of the frame element 104.

[0457] The sealing elements of a battery module 102 preferably comprise a first sealing section 136 and a second sealing section 138 (cf. Fig. 3 , 5 ,10 and 11 ).

[0458] The first sealing section 136 and / or the second sealing section 138 are preferably closed in a ring shape.

[0459] The first sealing section 136 and the second sealing section 138 of the sealing elements 134 preferably each comprise a sealing lip, which is not identified by a reference numeral in the figures for reasons of clarity.

[0460] The first sealing section 136 and the second sealing section 138 are connected to one another, for example by means of one or more web elements 140 (cf. Fig. 5 , 10 and 12 ).

[0461] The sealing elements 134 are preferably formed in one piece.

[0462] It may be advantageous if a sealing section 136, 138 of a sealing element 134 is arranged radially inside the line along which the through-openings 132 are arranged and radially outside the line along which the through-openings 132 are arranged.

[0463] The sealing sections 136, 138 of the sealing elements 134 are preferably closed in a ring shape and in particular run substantially parallel to the line along which the passage openings 132 are arranged.

[0464] Preferably, a respective battery module 102 of the battery device 100 comprises one or more spacer elements 142, by means of which the base elements 106 of the battery modules 102 are arranged or can be arranged substantially parallel to one another (cf. Fig. 14 and 15 ).

[0465] It may be advantageous if the spacer elements 142 of a battery module 102 are designed to be pressure-resistant.

[0466] Preferably, the spacer elements 142 of a battery module 102 have a higher compressive stability than the frame element 104 of the battery module 102, in particular in a direction parallel to the stacking direction 110 of the battery device 100.

[0467] The spacer elements 142 preferably comprise or are formed from a metallic material.

[0468] The spacer elements 142 are in particular inserted into the frame element 104 of a respective battery module 102.

[0469] The frame element 104 of a respective battery module 102 preferably comprises a plurality of receptacles 144, wherein a spacer element 142 is preferably arranged in each receptacle 144 (cf. Fig. 12 ).

[0470] It may be advantageous if the spacer elements 142 are essentially cylindrical.

[0471] Preferably, the spacer elements 142 of a respective battery module 100 are arranged outside the double wall 120 of the frame element 104 of a battery module 102 in a direction perpendicular to the stacking direction 110 of the battery device 100.

[0472] It may be advantageous if the spacer elements 142 of two adjacent battery modules 102 are arranged in alignment in the stacking direction 110 of the battery device 100 (cf. Fig. 14 and 15 ).

[0473] The spacer elements 142 preferably each comprise two contact surfaces 146 arranged on opposite sides of the spacer element 142 (cf. Fig. 5 , 10 and 12 ).

[0474] Preferably, a respective spacer element 142 rests with a first contact surface 146 on the base element 106 of the respective battery module 102 and with a second contact surface 146 on the base element 106 of an adjacent battery module 102 or can be placed thereon.

[0475] Preferably, a force introduction from the spacer elements 142 into the base elements 106 can be realized, in particular parallel to the stacking direction 110.

[0476] In particular, a compressive force can be transferred from the spacer elements 142 to the floor elements 106 resting on the contact surfaces 146 of the spacer elements 142.

[0477] It may be advantageous if the two contact surfaces 146 of a spacer element 142 have a distance 148 from one another which essentially corresponds to a height 150 of the wall 111, in particular of the double wall 120, of the frame element 104 of a battery module 102, taken parallel to the stacking direction 110 (cf. Fig. 12 ).

[0478] Preferably, it can be prevented that the frame elements 104 of the battery modules 102, which comprise or are formed from a plastic material, are compressed due to a clamping force acting on the battery modules 102 parallel to the stacking direction 110 of the battery device 100.

[0479] Preferably, the spacer elements 142 of a respective battery module 102 are bolt elements 152 or sleeve elements 154.

[0480] Spacer elements 142 designed as sleeve elements 154 are preferably hollow cylindrical.

[0481] It is particularly conceivable that the spacer elements 142 of a respective battery module 102 are substantially circular or annular in a cross section taken perpendicular to the stacking direction 110 of the battery device 100.

[0482] The spacer elements 142 are in particular rotationally symmetrical to a longitudinal axis thereof.

[0483] The spacer elements 142 comprise, for example, a spacer section 156 in which the spacer elements 142 are formed in particular cylindrically, for example circularly cylindrically.

[0484] The spacer portion 156 preferably extends between the contact surfaces 146 of a spacer element 142.

[0485] It may also be advantageous if the spacer elements 142 further comprise an insertion section 158 in which the spacer elements 142 are formed in particular cylindrically, for example circularly cylindrically.

[0486] The insertion portion 158 of a spacer element 142 is preferably insertable into the spacer portion 156 of a spacer element 142 adjacent to the battery device 100 in the stacking direction 110.

[0487] In the Fig. 1 to 15 In the embodiment of the battery device 100 shown, the battery modules 102 of the battery device 100 are clamped together, for example by means of the spacer elements 142.

[0488] The spacer elements 142 preferably each comprise screw elements 160, wherein adjacent spacer elements 142 can be screwed together in the stacking direction 110 of the battery device 100 (cf. Fig. 12 ).

[0489] For example, it is conceivable that the insertion section 158 of a spacer element 142 comprises an external thread and / or that the spacer section 156 of a spacer element 142 comprises an internal thread.

[0490] It may be advantageous if two adjacent battery modules 102 are clamped and / or screwed together.

[0491] Alternatively, it is conceivable that the battery modules 102 of the battery device 100 are clamped by means of clamping elements 162 which are guided through the spacer elements 142 and which are inserted into the Fig. 1 and 12 are shown in dashed lines.

[0492] Preferably, the clamping elements 162 of the battery device 100 are guided through spacer elements 142 designed as sleeve elements 154.

[0493] It can be provided that the battery modules 102 of the battery device 100 are clamped or can be clamped between two end bodies 164 by means of the clamping elements 162.

[0494] The two end bodies 164 comprise, for example, or are formed from a metallic material, in particular from steel or aluminum.

[0495] It may be advantageous if the two end bodies 164 comprise fastening elements (not shown in the drawings) by means of which the battery device 100 can be secured to a supporting structure, for example, to a supporting structure of a vehicle. It may therefore be advantageous if the battery device 100 can be secured to a supporting structure exclusively by means of the end bodies 164.

[0496] Alternatively or additionally, it is conceivable that the battery modules 102 of the battery device 100 each further comprise one or more additional fastening elements by means of which the battery device 100 can be fixed to a supporting structure.

[0497] By bracing the battery modules 102, preferably substantially no force is exerted on the battery cells 108 of the battery modules 102, in particular parallel to the stacking direction 110 and / or parallel to a longitudinal axis 126 of the battery cells 108 of a respective battery module 102.

[0498] It can be advantageous if the clamping elements 162 are so-called tension anchors.

[0499] The clamping elements 162 comprise, for example, or are formed from a metallic material, in particular steel or aluminum.

[0500] Tension rods designed as tensioning elements 162 each comprise, for example, a metallic rod which has a thread not shown in the drawings.

[0501] The rod is preferably arranged parallel to the stacking direction 110 to clamp the battery modules 102.

[0502] For example, in order to clamp the battery modules 102 between the two end bodies 164, a screw element 166, in particular a nut element, is screwed onto a respective clamping element 162.

[0503] It may be advantageous if the battery modules 102 are clamped in the stacking direction 110 with a clamping force which corresponds to a tension of at most approximately 30%, for example of at most approximately 50%, of an upper yield point of a material of the clamping elements 162.

[0504] Preferably, the battery modules 102 of the battery device 100 are pressed together before being clamped together, in particular in the stacking direction 110 of the battery device 100.

[0505] It may be advantageous if sealing elements 134 of the battery modules 102 are deformed, in particular compressed, when the battery modules 102 are pressed between a frame element 104 and a base element 106.

[0506] Preferably, the frame elements 104 of the battery modules 102 comprise one or more stacking projections 168 projecting away from the frame element 104 parallel to the stacking direction 110 of the battery device 100 (cf. Fig. 11 to 13 ).

[0507] It may also be advantageous if the frame elements 104 of the battery modules 102 comprise one or more stacking recesses 170, in each of which a stacking projection 168 of a frame element 104 of an adjacent battery module 102 can be received.

[0508] The stacking projections 168 and the stacking recesses 170 of a respective frame element 104 are preferably arranged on opposite sides of the frame element 104 (cf. Figs. 9 and 10 ).

[0509] Preferably, stacking of the battery modules 102 of the battery device 100 in the stacking direction 110 can be facilitated by means of the stacking projections 168 and / or by means of the stacking recesses 170.

[0510] It may also be advantageous if the frame element 104 of a respective battery module 102 is connected or connectable, for example clipped, to the base element 106 of the battery module 102 in a force-locking and / or form-locking manner.

[0511] Preferably, the frame element 104 of a respective battery module 102 comprises one or more locking projections 172.

[0512] Preferably, the base element 106 of a respective battery module 102 further comprises one or more locking recesses 174 into which the locking projections 172 of the frame element 104 can be inserted (cf. Fig. 7 to 12 ).

[0513] The locking projections 172 of a frame element 104 preferably each comprise two locking elements 176. Preferably, each locking element 176 of a locking projection 172 comprises a locking hook. For reasons of clarity, the locking hooks are not identified by a reference numeral in the figures.

[0514] In the Fig. 7 to 12 the locking projections 172 and the locking recesses 174 are arranged radially within a frame element 104 of a respective battery module 102.

[0515] Alternatively, it is conceivable that the locking projections 172 are arranged radially outside the wall 111, in particular radially outside the double wall 120, of the frame element 104 of a respective battery module 102.

[0516] It may be particularly advantageous if the part of the base element 106 of the respective battery module 102 that delimits the receiving space 112 of a respective battery module 102 does not have any locking recesses 174 and thus in particular no through-openings.

[0517] For example, at least partial filling of the receiving space 112 with potting compound and / or fixing of the battery cells 108 to the base element 106 by means of potting compound can thus be facilitated.

[0518] Preferably, the latching hooks of the two latching elements 176 of a latching projection 172 engage behind the base element 106 of a respective battery module 102 when the frame element 104 is connected, in particular clipped, to the base element 106 in a force-locking and / or form-locking manner.

[0519] The frame elements 104 preferably further comprise a stiffening structure 178, for example a stiffening rib structure 180, on a peripheral surface.

[0520] By means of the stiffening structure 178, the stiffness of, for example, an injection-molded frame element 104 can preferably be increased.

[0521] The stiffening rib structure 178 of the frame elements preferably comprises a plurality of rib elements 182.

[0522] The bottom elements 106 of the battery modules 102, which preferably comprise or are formed from a metallic material, preferably form part of an outer surface 184 of the battery device 100 (cf. Fig. 1 and 11 ), in particular in a direction perpendicular to the stacking direction 110 of the battery device 100.

[0523] The base elements 106 form, in particular, an annularly closed part of the outer surface 184 of the battery device 100. In particular, the base elements 106 of the battery modules 102 each form annularly closed surface sections of the outer surface 184 of the battery device 100.

[0524] The annularly closed surface sections formed by the base elements 106 of the battery modules 102 are preferably separated from one another in the stacking direction 110 of the battery device 100 by the frame elements 104 of the battery modules 102.

[0525] If the bottom elements 106 of the battery modules 102 extend to the outer surface 184 of the battery device 100, heat can preferably be dissipated to the outer surface 184 of the battery device 100 by means of the bottom elements 106.

[0526] Preferably, the battery cells 108 of a respective battery module 102 are thermally coupled to the base element 106 of the battery module 102.

[0527] For example, it is conceivable that the battery cells 108 of a respective battery module 102 are thermally coupled to the base element 106 of the battery module 102 by means of a thermally conductive paste and / or by means of a potting compound.

[0528] Preferably, the battery cells 108 of a respective battery module 102 are fixed to the base element 106 of the battery module 102.

[0529] In particular, the battery cells 108 and the base element 106 are not in direct material contact.

[0530] In particular, passive temperature control of the battery device 100 can be realized by means of the base elements 106.

[0531] In particular, since the base elements 106 form part of the outer surface 184 of the battery device 100, heat dissipation to the outer surface 184 of the battery device 100 can be realized by means of the base elements 106.

[0532] In particular, the battery cells 108 of a respective battery module 102 can be cooled by means of the base elements 106.

[0533] It may be advantageous if the floor elements 106 have a thermal conductivity of at least approximately 100 W / m*K, for example of at least approximately 150 W / m*K.

[0534] If the floor elements 106 comprise or are formed from aluminum, in particular AlMgSi0.5, they preferably have a thermal conductivity of approximately 186 W / m*K.

[0535] In an embodiment of the battery device 100 not shown in the drawing, it is conceivable that the base elements 106 of the battery modules 102 protrude perpendicular to the stacking direction 110 of the battery device 100, at least in sections, for example in a closed ring shape, beyond the frame elements 104 of the battery modules 102.

[0536] It can be provided that the battery device 100 comprises a heat sink and / or a temperature control element, which are thermally coupled to individual or several, preferably to all, base elements 106 of the battery device 100.

[0537] The heat sink preferably comprises one or more cooling fins.

[0538] The heat sink and / or the temperature control element are arranged in particular on the outer surface 184 of the battery device 100.

[0539] Preferably, the heat sink is in direct material contact with one or more, preferably with all, base elements 106 of the battery device 100, in particular on the part of the outer surface 184 of the battery device 100 which is formed by the respective base elements 106 of the battery modules 102.

[0540] It may also be advantageous if the base elements 106 comprise one or more tempering channels not shown in the drawings, for example a tempering channel structure.

[0541] A temperature control channel, in particular a temperature control channel structure, of the base elements 106 can preferably be flowed through by means of a temperature control medium.

[0542] For example, it is conceivable that the base elements 106 are formed in multiple layers and delimit a temperature control channel, in particular a temperature control channel structure.

[0543] A temperature control channel structure of the base elements 106 is produced, for example, by roll bonding.

[0544] It may be advantageous if, by providing a temperature control channel in the base elements 106, an active temperature control of the battery device 100 can be realized by means of the base elements 106.

[0545] Preferably, the battery modules 102 further comprise a holding body 186 for holding the battery cells 108 of the respective battery module 102.

[0546] The holding bodies 186 are preferably connected to the base element 106 of a respective battery module 102, in particular by a material bond.

[0547] The holding bodies 186 are in particular formed in one piece.

[0548] Preferably, the holding bodies 186 comprise or are formed from a plastic material.

[0549] The holding bodies 186 are in particular injection-molded components, in particular one-piece injection-molded components.

[0550] The holding body 186 preferably comprises a plurality of receiving openings 188, in each of which a battery cell 108 of the battery module 102 is received.

[0551] For reasons of clarity, the Fig. 3 and 5 only individual receiving openings 188 are marked with a reference symbol.

[0552] For example, it is conceivable that the holding body 186 comprises approximately 200 to approximately 600 receiving openings 188, for example approximately 400 receiving openings 188.

[0553] A number of receiving openings 188 of the holding body preferably corresponds substantially to a number of battery cells 108 of a battery module 102.

[0554] Preferably, the holding bodies 186 of the battery modules 102 comprise a honeycomb structure 190 or are formed by a honeycomb structure 190.

[0555] The honeycomb structure 190 of the holding bodies 186 preferably comprises a plurality of, in particular, polygonal holding elements 192, which delimit the receiving openings 188.

[0556] The holding elements 192 are, for example, regular hexagons.

[0557] Preferably, the holding elements 192 are each arranged adjacent to a plurality of further holding elements 192.

[0558] For example, it is conceivable that holding elements 192 of the honeycomb structure 190 are each arranged adjacent to six further holding elements 192.

[0559] The receiving openings 188 of a holding element 192 are preferably delimited by a plurality of holding element webs 194, for example by six holding element webs 194 each.

[0560] Preferably, several holding element webs 194 of adjacent holding elements 192 are connected to one another at a node 196.

[0561] It may be particularly advantageous if three holding element webs 194 of three adjacent holding elements 192 are connected to one another at the node 196.

[0562] Preferably, the holding bodies 186 are each injection-molded onto the base element 106 of a battery module 102.

[0563] It may be advantageous if the holding bodies 186 comprise connecting regions 198 arranged at a plurality of nodes 196, at which the holding bodies 186 are each connected to the floor element 106, for example by means of a material bond.

[0564] Preferably, the holding bodies 186 are injection-molded onto the floor elements 106 at the connecting regions 198.

[0565] For example, it is conceivable that a connecting region 198 is arranged at approximately 50% of the nodes 196 of the holding body 186.

[0566] As an alternative to the Fig. 1 to 6 and 11 to 15 The holding body 186 shown in FIG. 1 can be a respective battery module 102 which is only Fig. 11 holding body 186 shown in dashed lines for holding the battery cells 108.

[0567] The battery cells 108 of a respective battery module 102 are preferably integrally connected to the base element 106 of the battery module 102 by means of a potting compound 199.

[0568] The potting compound 199 comprises, for example, polyurethane, silicone and / or an epoxy resin.

[0569] The battery cells 108 are particularly embedded in the potting compound 199.

[0570] The casting compound 199 forms in particular the Fig. 11 holding body 186 shown in dashed lines.

[0571] It may be advantageous if the battery cells 108 are partially or completely embedded in the potting compound 199.

[0572] For example, it is conceivable that at least approximately 30%, for example at least approximately 50%, of a respective battery cell 108 relative to a length thereof measured parallel to a longitudinal axis 126 of the battery cell 108 is embedded in potting compound 199.

[0573] Preferably, the battery cells 108 of a respective battery module 102 are thermally coupled to the base element 106 and / or electrically insulated therefrom by means of the potting compound 199.

[0574] It may be advantageous if the battery cells 108 are arranged by means of the potting compound 199 at a distance in the range of approximately 0.2 mm to approximately 1.5 mm, preferably in the range of approximately 0.3 mm to approximately 1 mm, from the base element 106.

[0575] Preferably, the two sealing elements 134 of a respective battery module 102 are connected to the base element 106 of the battery module 102, in particular by a material bond.

[0576] The sealing elements 134 are preferably each injection-molded onto the base element 106.

[0577] The two sealing elements 134 of a battery module 102 are preferably injection-molded onto the base element 106 on two opposite sides of the base element 106.

[0578] The floor elements 106 are preferably hybrid components, in particular metal-elastomer hybrid components.

[0579] Preferably, individual, several or all battery modules 102 of the battery device 100 each comprise a degassing element, not shown in the drawings, for degassing the receiving space 112 of the respective battery module 102.

[0580] It may be particularly advantageous if each individual battery module 102 comprises a degassing element.

[0581] Preferably, the degassing element of a respective battery module 102 is arranged on the frame element 104 of the battery module 102.

[0582] For example, it is conceivable that the degassing element comprises or is formed by a bursting element and / or a pressure compensation element.

[0583] If all battery modules 102 of the battery device 100 each comprise a degassing element, a particularly short degassing path can preferably be realized so that hot gases can be guided as directly as possible into an environment of the battery device 100.

[0584] Preferably, propagation of a thermal runaway from battery cells 108 of a battery module 102 to further battery cells 108 of the same battery module 102 and / or to battery cells 108 of adjacent battery modules 102 can be prevented.

[0585] It may also be advantageous if the battery modules 102 of the battery device 100 each comprise a propagation protection element not shown in the drawings.

[0586] Preferably, the propagation protection elements of a respective battery module 102 comprise a heat-resistant and / or thermally insulating material, for example rock wool fleece and / or glass fiber fleece.

[0587] The propagation protection elements are connected, for example, glued, to the base elements 106 of the battery modules.

[0588] It may be advantageous if a propagation protection element of a battery module 102 is arranged on a side of the base element 106 facing away from the receiving space 112 of the battery module 102.

[0589] Preferably, the propagation protection element of a battery module 102 delimits the receiving space 112 of an adjacent battery module 102.

[0590] By providing a propagation protection element, propagation of a thermal runaway from battery cells 108 of a battery module 102 to battery cells 108 of an adjacent battery module 102 can preferably be prevented.

[0591] The Fig. 1 to 16 The battery device 100 shown further comprises, for example, one or more temperature control elements 200, which are each arranged between two adjacent battery modules 102.

[0592] Such a tempering element 200 is, for example, in Fig. 16 shown.

[0593] Preferably, the tempering elements 200 have a cross-section taken perpendicular to the stacking direction 110 of the battery device 100, which cross-section substantially corresponds to a cross-section of a receiving space 112 of the battery modules 102 of the battery device 100 taken perpendicular to the stacking direction 110 of the battery device 100.

[0594] It may be advantageous, for example, if the tempering elements 200 comprise or are formed by electrical resistance heating elements.

[0595] Preferably, a tempering element 200, which comprises or is formed by an electrical resistance heating element, forms a propagation protection element.

[0596] A tempering element 200, which comprises or is formed by an electrical resistance heating element, preferably comprises a heat-resistant material.

[0597] Alternatively or additionally, it is conceivable that the temperature control elements 200, which are each arranged between two adjacent battery modules 102, comprise one or more temperature control channels through which a temperature control medium, for example a cooling or heating liquid, can be conducted.

[0598] It can be advantageous if the tempering elements 200 are manufactured using a roll bonding process.

[0599] Preferably, the tempering elements 200 each comprise two or more than two tempering zones 202 in which different temperatures can be set.

[0600] In particular, the tempering elements 200 in the tempering zones 202 have a different heating power from one another.

[0601] For example, it is conceivable that the tempering elements 202 comprise a radially inner tempering zone 204 and a radially outer tempering zone 206.

[0602] The radially outer tempering zone 206 preferably surrounds the radially inner tempering zone 204.

[0603] It may be advantageous if the tempering elements 200 in the radially outer tempering zone 206 have a higher area-related heating output than in the radially inner tempering zone 204.

[0604] Preferably, by providing a temperature control element 200 with multiple temperature control zones 204, selective heating of individual groups of battery cells 108 can be enabled. In particular, temperatures of the battery cells 108 of a battery module 102 can be made uniform.

[0605] Preferably, by equalizing the temperatures of the battery cells 108 of a battery module 102, a higher maximum charging current and thus, in particular, a shortening of a charging time can be realized.

[0606] In particular, a more uniform discharge of the battery cells 108 of a battery module 102 can be realized.

[0607] One in Fig. 17 The embodiment of a battery device 100 shown in FIG. 1 differs from that shown in FIGS. Fig. 1 to 16illustrated embodiment of a battery device 100 essentially in that the frame element 104 and the base element 106 are made of a metallic material.

[0608] Preferably, the frame element 104 forms a spacer element 142.

[0609] It may be advantageous if the frame element 104 and / or the base element 106 are made in one piece from a metallic material, for example from aluminum.

[0610] For example, it is conceivable that the frame element 104 and the base element 106 are a one-piece aluminum die-cast part.

[0611] Alternatively, it is conceivable that a base element 106 is integrally connected, in particular welded, to a frame element 104, for example by means of friction stir welding.

[0612] By materially connecting the floor element 106 and the frame element 104, a thermal and / or mechanical coupling of the floor element 106 and the frame element 104 can preferably be realized.

[0613] In particular, a metallic heat conduction from the base element 106 into the frame element 104 can be realized.

[0614] Preferably, the frame element 104 comprises one or more heat conducting elements 208, in particular one or more cooling fins 210, which are arranged in particular on the outer surface 184 of the frame element 104.

[0615] For example, it is conceivable that the cooling fins 210 are arranged parallel to the stacking direction 110.

[0616] In particular, the temperature control device 137 comprises one or more heat conducting elements 208, in particular the cooling fins 210.

[0617] Preferably, the outer surface 184 of the frame element 104 can be enlarged by means of the heat conducting elements 208, in particular by means of the cooling fins 210.

[0618] A ratio of the outer surface 184 of the frame member 104 to an inner surface of the frame member 104 is preferably at least about 1.3:1, preferably at least about 1.5:1.

[0619] It may also be advantageous if the temperature control device 137 comprises, in addition to the heat conducting elements 208, a fan (not shown in the drawings), by means of which the heat conducting elements 208 can be blown onto in order to dissipate heat from them.

[0620] Alternatively or additionally, it is conceivable that the heat conducting elements 208 can be blown onto by the wind when a vehicle is moving in order to dissipate heat from them.

[0621] Furthermore, the Fig. 17illustrated embodiment of a battery device 100 in terms of structure and function with the one shown in the Fig. 1 to 16 illustrated embodiment of a battery device 100, so that reference is made to the above description thereof in this respect.

[0622] One in the Fig. 18 and 19 The embodiment of a battery device 100 shown in FIG. 1 differs from that shown in FIGS. Fig. 1 to 16 illustrated embodiment of a battery device 100 essentially in that one or both end bodies 164 of the battery device 100 comprise a distributor structure 201 for distributing temperature control medium into the temperature control channels 135 of the battery modules 102.

[0623] It may be advantageous if the tempering medium can be guided by means of the distributor structure 201 into the double wall 120, in particular into the tempering chamber 130 of a battery module 102, which is arranged adjacent to an end body 164.

[0624] The end bodies 164 comprise, for example, a cover element 203 and a particularly annularly closed edge element 205.

[0625] The edge element 205 preferably projects beyond the cover element 203 parallel to the stacking direction 110 and has a mechanical stabilizing effect, for example.

[0626] In the Fig. 18 and 19 In the embodiment of a battery device 100 shown, individual connecting webs 128a parallel to the stacking direction 110 of the battery device 100 have a height which substantially corresponds to the height of the frame element 106 of a battery module 102.

[0627] Due to the connecting webs 128a, temperature control chambers 207 are formed in the double wall 120, in particular in the temperature control space 130 of the battery modules 102, which are in particular fluidically separated from one another.

[0628] It may be advantageous if the web elements 140 of a sealing element 134 rest against the connecting webs 128a.

[0629] Preferably, the temperature control chambers 207 can be sealed by means of the sealing element 134, in particular by means of the web elements 140 of the sealing element 134.

[0630] Connecting webs 128b arranged within a respective temperature control chamber 207 preferably do not completely separate the respective temperature control chamber 207 in a fluid-effective manner.

[0631] For example, it is possible for the connecting webs 128b arranged within a respective temperature control chamber 207 to have a height parallel to the stacking direction 110 of the battery device 100 that is smaller than the height of the frame element 106 of a battery module 102.

[0632] In order to be able to guide temperature control medium into the temperature control chambers 207 of the double wall 120 of the frame element 106, one or both end bodies 164 comprise in particular a plurality of distribution channels 209 of the distribution structure 201.

[0633] The distribution channels 209 include, for example, inlet channels 209a and / or return channels 209b.

[0634] It may be advantageous if a respective distribution channel 209 comprises a deflection, not shown in the drawings, which is arranged in the edge element 205.

[0635] By means of the deflection, the tempering medium can preferably be deflected by approximately 90°.

[0636] The distribution channels 209, in particular the inlet channels 209a and / or the return channels 209b, preferably each open at a distributor opening 211 on an end face of the edge element 165 arranged perpendicular to the stacking direction 110.

[0637] It may be advantageous, for example, if three distribution openings 211 are each directed into a temperature control chamber 207.

[0638] In particular, it is conceivable that only distribution openings 211 of inlet channels 209a and / or only distribution openings 211 of return channels 209b are directed into a temperature control chamber 207.

[0639] It may be particularly advantageous if only distribution openings 211 of inlet channels 209a and / or only distribution openings 211 of return channels 209b are directed alternately into adjacent temperature control chambers 207.

[0640] Preferably, an at least approximately constant temperature of the frame element 106 can be set.

[0641] Furthermore, the Fig. 18 and 19 illustrated embodiment of a battery device 100 in terms of structure and function with the one shown in the Fig. 1 to 16illustrated embodiment of a battery device 100, so that reference is made to the above description thereof in this respect.

[0642] The Fig. 20 to 22 show various method steps of an embodiment of a method for fixing battery cells 108.

[0643] In the method, the battery cells 108, in particular round cells, are fixed in a layer element 212, in particular by plastically deforming the layer element 212.

[0644] The layer element 212 is, for example, a hot-formable layer element 212.

[0645] The layer element 212 preferably comprises or is formed from a plastic material.

[0646] The layer element 212 comprises in particular an electrically insulating material or is formed from it.

[0647] It may be advantageous, for example, if the layer element 212 comprises or is formed from a polyolefin, for example polyethylene (PE) or polypropylene (PP).

[0648] Preferably, the layer element 212 comprises a low-density polyethylene (LDPE).

[0649] The layer element 212 is, for example, a shrink film.

[0650] Furthermore, it is conceivable, for example, that the layer element comprises or is formed from polymethyl methacrylate (PMMA) or polycarbonate (PC).

[0651] The battery cells 108 are preferably aligned relative to one another before being fixed in the layer element 212, in particular by means of a tool 214.

[0652] The tool 214 comprises in particular a first tool half 216 with a negative mold in which the battery cells 108 can be at least partially received.

[0653] The first tool half 216 has in particular a negative form of the predetermined pattern.

[0654] The tool 214 preferably comprises a second tool half 218 with a negative mold in which the battery cells 108 can be at least partially received.

[0655] The first and second tool halves 216, 218 are preferably movable relative to each other.

[0656] The first tool half 216 is in particular a die element 220.

[0657] The first tool half 216 forms in particular a shaping element 222.

[0658] The first tool half 216 preferably comprises a plurality of positioning openings 224, in each of which a battery cell 108 can be received for aligning the battery cells 108.

[0659] In particular, it is conceivable that the first tool half 216 comprises a plurality of rows and a plurality of rows of positioning openings 224, wherein a row and / or a row each comprises a plurality of positioning openings 224.

[0660] Preferably, the second tool half 218 also has a negative form of the predetermined pattern.

[0661] The second tool half 218 preferably also comprises a plurality of positioning openings 224, in each of which a battery cell 108 can be received for aligning the battery cells 108.

[0662] It may be advantageous if the positioning openings 224 of the first tool half 216 and / or the second tool half 218 are each substantially cylindrical, in particular substantially circular-cylindrical.

[0663] Preferably, an inner diameter 226 of the positioning openings 224 of the first tool half 216 is larger than an outer diameter 228 of the battery cells 108.

[0664] It may be advantageous, for example, if an inner diameter 226 of the positioning openings 224 of the first tool half 216 is substantially equal to or smaller than the sum of the outer diameter 228 of the battery cells 108 and twice the material thickness 230 of the layer element 212.

[0665] It may also be advantageous if an inner diameter 232 of the positioning openings of the second tool half substantially corresponds to the outer diameter 228 of the battery cells 108.

[0666] The battery cells 108 are preferably arranged in the positioning openings 224 of the first tool half 216.

[0667] It may be advantageous to use a positioning device not shown in the drawings, for example an industrial robot.

[0668] Preferably, the battery cells 108 are arranged in the predetermined pattern in a plurality of rows and a plurality of columns.

[0669] For example, it is conceivable that the battery cells 108 each have an identical first distance from one another in a row direction of the predetermined pattern.

[0670] It may also be advantageous if the battery cells 108 each have an identical second distance from one another in a column direction of the predetermined pattern.

[0671] It can be provided that the first distance in the row direction is smaller or larger than the second distance in the column direction.

[0672] Preferably, the layer element 212 is deformed by positioning the layer element 212 between the battery cells 108 and the first tool half 216 and then arranging the battery cells 108 in the positioning openings 224 of the first tool half 216.

[0673] Preferably, the layer element 212 and a respective battery cell 108 are clamped within the positioning openings 224 of the first tool half 216 and thereby deformed.

[0674] The layer element 212 is in particular clamped between a positioning opening wall 234 and a battery cell 108.

[0675] Before fixing the battery cells 108 in the layer element 212, they are preferably first aligned parallel to one another and / or in the predetermined pattern using the tool 214 (cf. Fig. 21 ).

[0676] The battery cells 108 are arranged in particular such that the longitudinal axes 126 of the battery cells 108 are arranged parallel to one another.

[0677] After the parallel alignment and / or after the alignment in a predetermined pattern, preferably individual or multiple battery cells 108 are moved parallel to the longitudinal axes 126 of the battery cells 108 (cf. Fig. 22 ).

[0678] Preferably, the battery cells 108 are moved against a stop 236, which is preferably arranged perpendicular to the longitudinal axes 126 of the battery cells 108.

[0679] The battery cells 108 are preferably moved against the stop 236 in such a way that the base surfaces 238 of all battery cells 108 are arranged in a single plane after the movement.

[0680] It may be advantageous if the first tool half 216 and the second tool half 218 are moved towards each other in order to arrange the base surfaces 238 of the battery cells 108 in one plane.

[0681] For example, it is conceivable that the positioning openings 224 of the first tool half 216 and / or the positioning openings 224 of the second tool half 218 comprise or form a stop 236.

[0682] Alternatively, it is conceivable that the second tool half 218 comprises a stop 236 and that the first tool half 216 comprises a movement device (not shown in the drawings) for moving individual or multiple battery cells 108, by means of which the battery cells can be moved against the stop 236 of the second tool half 218.

[0683] For example, it is conceivable that the movement device comprises one or more pistons which can be displaced in positioning openings 224 of the first tool half 216.

[0684] Alternatively, it is conceivable that the movement device comprises one or more nozzle elements which open into the positioning openings 224 of the first tool half 216.

[0685] Preferably, the layer element 212 and / or the battery cell 108 arranged in a respective positioning opening 224 are moved by pressurizing a pressure chamber 240 delimited by the layer element 212 and the positioning opening 224.

[0686] In particular, the layer element 212 and the battery cell 108 arranged in a respective positioning opening 224 of the first tool half 216 are moved in the positioning opening 224.

[0687] Preferably, the battery cells 108 are fixed in the layer element 212 by heating the layer element 212 and / or by subsequently cooling the layer element 212.

[0688] The layer element 212 is preferably shrunk onto the battery cells 108.

[0689] In particular, the layer element 212 is shrunk onto only a partial area of ​​the battery cells 108.

[0690] Preferably, the battery cells 108 are not completely surrounded by the layer element 212.

[0691] It may be advantageous, for example, if the layer element 212 is shrunk onto the battery cells 108 only on a first side of the battery cells 108 in the direction of the longitudinal axes 126 of the battery cells 108.

[0692] For example, it can be provided that the layer element 212 is shrunk onto the battery cells 108 to a maximum of approximately 50% of a length 242 of a respective battery cell 108.

[0693] Preferably, the layer element 212 is shrunk onto the battery cells 108 to at least approximately 10%, in particular to at least approximately 20%, for example to at least approximately 30%, of the length 242 of a respective battery cell 108.

[0694] After the battery cells 108 have been fixed, the layer element 212 preferably rests against the battery cells 108 in a pot-shaped manner.

[0695] In particular, it can be provided that the layer element 212 rests against a lateral surface 244 of a respective battery cell 108 to a maximum of approximately 50%.

[0696] Preferably, the layer element 212 rests at least approximately 10%, for example at least approximately 20%, preferably at least approximately 30%, against a lateral surface 244 of a respective battery cell 108.

[0697] It may also be advantageous if the layer element, after the battery cells 108 have been fixed, lies completely against the base surface 238 of a respective battery cell 108.

[0698] The cooled layer element 212 is preferably substantially rigid.

[0699] The plastically deformed layer element 212 preferably forms a holding body 186 of a battery module 102 (cf. Fig. 23 to 25 ).

[0700] The Fig. 24 and 25 show a base element 106 of a battery module 102, wherein the layer element 212 and the battery cells 108 fixed in the layer element 212 are fixed to the base element 106 of the battery module 102.

[0701] Preferably, the layer element 212 is integrally connected to the base element 106, in particular by means of a thermally conductive paste 246 (cf. Fig. 25 ).

Claims

1. Battery device (100), wherein the battery device (100) comprises one or more battery modules (102), wherein a respective battery module (102) comprises the following: a frame element (104); a base element (106); and a plurality of battery cells (108), wherein the battery modules (102) are arranged or can be arranged along a stacking direction (110), wherein the frame elements (104) of the respective battery modules (102) form housing portions of the battery device (100).

2. Battery device according to Claim 1, characterized in that longitudinal axes (126) of the battery cells (108) of a respective battery module (102) are arranged substantially parallel to the stacking direction (110) of the battery modules (102).

3. Battery device according to Claim 1 or 2, characterized in that the battery cells (108) are round cells.

4. Battery device according to any of Claims 1 to 3, characterized in that the battery device (100) comprises two end bodies (164), wherein the battery modules (102) of the battery device (100) are preferably arranged between the two end bodies (164).

5. Battery device according to Claim 4, characterized in that the two end bodies (164) comprise fastening elements, by means of which the battery device (100) can be fixed to a supporting structure, for example to a supporting structure of a vehicle.

6. Battery device according to any of Claims 1 to 5, characterized in that the battery modules (102) of the battery device (100) are braced or can be braced to each other.

7. Battery device according to any of Claims 1 to 6, characterized in that a respective battery module (102) comprises a sealing element (134) and / or a propagation protection element.

8. Battery device according to any of Claims 1 to 7, characterized in that the battery cells (108) of a respective battery module (102) are fixed to the base element (106) of the battery module (102).

9. Battery device according to any of Claims 1 to 8, characterized in that the frame element (104) of a respective battery module (102) comprises or forms a temperature-control device (137).

10. Battery device according to any of Claims 1 to 9, characterized in that individual, a plurality of or all of the battery modules (102) of the battery device (100) each comprise a degassing element for degassing a receiving chamber (112) of the respective battery module (102).

11. Battery device according to any of Claims 1 to 10, characterized in that all of the battery modules (102) of the battery device (100) or more than 50% of the battery modules (102) of the battery device (100) are identical.

12. Battery device according to any of Claims 1 to 11, characterized in that the battery device (100) comprises one or more temperature-control elements (200), which are arranged between two adjacent battery modules (102) in each case.

13. Battery device according to any of Claims 1 to 12, characterized in that the frame element (104) and / or the base element (106) are / is produced in particular in one piece from a metal material, for example from aluminium.

14. Battery device according to any of Claims 1 to 13, characterized in that the frame element (104) is produced from a plastic material and / or in that the base element (106) is produced from a metal material.

15. Battery device according to any of Claims 1 to 14, characterized a) in that a respective battery module (102) comprises electrical contact-making elements, by means of which two adjacent battery modules (102) can be interconnected in series with each other by stacking the battery modules (102) along the stacking direction (110); and / or b) in that a respective battery module (102) comprises one or more spacer elements (142), by means of which the base elements (106) of the battery modules (102) are arranged or can be arranged substantially parallel to each other; and / or c) in that a respective battery module (102) comprises a detection device for detecting the cell voltages of the battery cells (108) of the battery module (102) and / or for detecting the temperatures of the battery cells (108) of the battery module (102) and / or in that a respective battery module (102) comprises a balancer for balancing the battery cells (108) of the battery module (102).