Method for forming a battery unit, and battery unit

Abstract

The aim of the invention is to provide a method for forming a battery unit, by means of which method simple production of the battery unit is made possible and by means of which a battery cell of the battery unit is securely accommodated. This aim is achieved by the method comprising the following steps: introducing a battery cell into an interior of a housing and positioning the battery cell relative to a base element in the interior of the housing, wherein the battery cell is positioned at a distance from the base element by means of a positioning device; providing a functional compound on the base element and / or the battery cell, wherein the functional compound is provided before and / or after the positioning of the battery cell; and forming a connection between the battery cell and the base element by means of the functional compound whilst the positioning device spaces the battery cell from the base element.

Description

[0001] Method for forming a battery unit and battery unit

[0002] The present invention relates to a method for forming a battery unit and a battery unit.

[0003] Battery units are known in which a battery cell is accommodated in a battery housing and is fixed in the battery housing by a fixing device.

[0004] The present invention is based on the object of proposing a method for forming a battery unit that enables simple manufacture of the battery unit and by which the battery cell is securely accommodated in the housing. Furthermore, the object of the invention is to propose a battery unit that enables safe operation of a battery cell.

[0005] This object is achieved according to the invention by a method for forming a battery unit, wherein the method comprises the steps of: introducing a battery cell into an interior space of a housing and positioning the battery cell relative to a base element in the interior space of the housing, wherein the battery cell is positioned at a distance from the base element by a positioning device, providing a functional mass on the base element and / or the battery cell, wherein the functional mass is provided before and / or after the positioning of the battery cell, and forming a connection between the battery cell and the base element by means of the functional mass, while the positioning device spaces the battery cell from the base element.

[0006] The positioning device allows the battery cell to be arranged in the interior of the housing at a distance from the base element and / or in a defined position.

[0007] The positioning device allows the battery cell to be connected to the base element via the functional mass, while simultaneously positioning the battery cell at a distance from the base element. The functional mass can be provided on the base element and / or the battery cell both before and after positioning the battery cell relative to the base element.

[0008] If the functional mass for connecting the battery cell to the base element is provided after the positioning of the battery cell, it can preferably be provided that the functional mass is introduced into an intermediate space which is formed between the base element and the battery cell positioned relative to the base element.

[0009] The base element can preferably be a cooling structure and / or fastening structure for the battery cell that can be arranged in the interior of the housing.

[0010] The base element can preferably be arranged both as a separate element in the interior of the housing and can also be formed at least partially integrally with the housing or a housing component.

[0011] Preferably, the base element can be formed at least partially from a heat-conducting material, preferably from a metallic material, for example from copper, a light metal or the like.

[0012] Alternatively, the base element may be formed at least partially from a plastic material or a composite material.

[0013] Likewise, the base element can be designed as a hybrid component which is partly made of a metallic material and partly of a composite material and / or plastic material.

[0014] Advantageously, the base element can be formed, at least in part, from a flat element, e.g., a sheet metal element, a flat metal, or the like. This allows the base element to have a compact, particularly flat, design and occupy a small amount of space within the housing.

[0015] Advantageously, the base element can be formed by one or more such flat elements. The base element can have a shape that is at least partially adapted to the interior of the housing, for example, a box-like shape or the like.

[0016] Preferably, the battery cell can be introduced, in particular inserted, into the base element.

[0017] Particularly preferably, the base element may comprise a heat-conducting element or form a heat-conducting element in order to form the cooling structure for the battery cell.

[0018] For example, the base element can be designed as a cooling plate for dissipating battery heat from the battery cell. Such a cooling plate can provide effective dissipation of battery heat during battery cell operation.

[0019] A further development of the method can provide that the battery cell is positioned at a defined positioning distance from the base element formed by the positioning device.

[0020] Advantageously, the battery cell can be positioned and / or fixed in at least one spatial direction in the interior of the housing by the positioning device.

[0021] Preferably, the battery cell is positioned by the positioning device in a spatial direction oriented orthogonally to the base element.

[0022] The defined positioning distance formed by the positioning device can be formed, for example, by a distance of at least about 5 mm, preferably at least about 10 mm, and a distance of at most about 50 mm, preferably at most about 30 mm, between the positioned battery cell and the base element.

[0023] An embodiment of the method can also provide that the battery cell and / or the base element is brought into contact with at least one contact section formed by the positioning device in order to position the battery cell at the defined positioning distance from the base element.

[0024] The contact section formed by the positioning device is provided in particular so that the battery cell can be brought into a defined contact on the contact section in order to position it at the defined positioning distance from the base element.

[0025] The contact section formed by the positioning device can preferably be provided at a distance of at least about 5 mm, preferably at least about 10 mm, and a distance of at most about 50 mm, preferably at most about 30 mm, from the base element.

[0026] In an advantageous embodiment of the method, at least one spacer element of the positioning device can be attached and / or formed on the base element or on the battery cell, by which the at least one contact section is formed.

[0027] The at least one spacer element can be attached to the base element or to the battery cell as a separate element or can be formed integrally with the base element or with the housing or a housing component.

[0028] Advantageously, the at least one spacer element can be attached and / or formed in such a way that it extends from the base element or housing or from the housing component in the direction of the interior of the housing.

[0029] Preferably, the at least one spacer element can have an end section pointing towards the interior of the housing, by means of which the contact section spaced apart from the base element is formed.

[0030] The at least one spacer element can have any geometric configuration.

[0031] Preferably, the at least one spacer element can be formed as a raised portion, a projection, or the like from the base element, integrally formed therewith, or attached thereto. For example, the at least one spacer element can be designed as a pin, a stud, a stamp, or the like that is formed from the base element, integrally formed therewith, or attached thereto.

[0032] Likewise, the at least one spacer element can be designed as a rib, rib-shaped structure or the like, which is formed from the base element, formed onto it or attached to it.

[0033] Particularly preferably, the contact section formed by the at least one spacer element can be formed by the end section pointing away from the base element or the end face of the spacer element.

[0034] The at least one spacer element can preferably be formed from a plastic material, for example a thermoplastic plastic.

[0035] Alternatively, the at least one spacer element can also be made of a metallic material or a composite material.

[0036] Preferably, the at least one spacer element can be attached and / or formed in such a way that it extends at least about 5 mm, preferably at least about 10 mm, and / or at most about 50 mm, preferably at most about 30 mm, away from the base element or the battery cell.

[0037] In particular, the positioning device can comprise a plurality of spacer elements which are attached and / or formed on the base element or on the battery cell and by which the contact section spaced apart from the base element is formed.

[0038] Particularly preferably, the plurality of spacer elements can be attached and / or formed at a distance from one another on the base element or on the battery cell. As a result, the spacer elements can form a planarly extending contact section for the battery cell or the base element.

[0039] In an advantageous development of the method, the at least one spacer element of the positioning device can be attached to a fastening section provided on the base element or on the battery cell. The at least one spacer element can be detachably or permanently coupled to the base element or the battery cell by means of the fastening section provided on the base element or on the battery cell.

[0040] Preferably, the at least one spacer element can be designed as a separate element from the base element or the battery cell and can be detachably or non-detachably coupled to the base element or the battery cell by the fastening section.

[0041] Advantageously, several fastening sections can be provided on the base element or the battery cell, so that in each case a spacer element can be coupled to a fastening section on the base element or the battery cell.

[0042] In this way, a fastening section can be formed on the base element or on the battery cell for each of a plurality of spacer elements, so that the spacer elements can be coupled individually or jointly to the base element or the battery cell.

[0043] Particularly preferably, a plurality of fastening sections are provided at a distance from one another on the base element or the battery cell, so that the flatly extending contact section for the battery cell is formed by coupling the spacer elements to the fastening sections.

[0044] Particularly preferably, the at least one spacer element can be inserted into an opening provided on the base element in order to be attached to the base element.

[0045] In particular, the fastening section can be formed as one or more such openings in the base element and one or more spacer elements can be inserted into the one or more openings.

[0046] Preferably, a corresponding opening can be provided for each spacer element, into which the respective spacer element is inserted for coupling to the base element. The opening can be formed with any desired geometry, in particular a geometry that corresponds to the geometry of the respective spacer element.

[0047] For example, the opening can be hole-shaped, e.g. with a round, oval or polygonal cross-section in the base element.

[0048] For example, the spacer element designed as a pin, pin, stamp or the like can be inserted into such a hole-shaped opening in order to be coupled to the base element.

[0049] The opening can also be designed in a slot-like manner, e.g. with a passage cross-section extending longitudinally in the base element.

[0050] For example, the spacer element designed as a rib, rib-shaped structure or the like can be inserted into such a slot-shaped opening in order to be coupled to the base element.

[0051] In particular, a plurality of such hole-shaped and / or slot-shaped openings are formed in the base element at a distance from one another, so that the contact section for the battery cell, which extends flatly to the base element, is formed by the spacer elements inserted into the openings.

[0052] In a further embodiment of the method, the functional mass can be provided with a layer thickness on the base element and / or the battery cell that is equal to or smaller than the defined positioning distance formed by the positioning device.

[0053] For example, the functional mass can be provided on the base element and / or the battery cell with a layer thickness of equal to or less than approximately 5 mm, or approximately 10 mm, or approximately 30 mm, or approximately 50 mm. Preferably, the functional mass can be provided on the base element and / or the battery cell in such a way that it at least partially surrounds the positioning device, in particular the at least one spacer element.

[0054] Advantageously, the functional mass can also be provided with a layer thickness on the base element and / or the battery cell, in which the functional mass is at least partially displaced by the battery cell by positioning the battery cell on the at least one spacer element.

[0055] In this way, a secure connection of the functional mass to the battery cell can be formed by embedding the battery cell in the functional mass, while at the same time the latter is positioned by the positioning device at the defined positioning distance from the base element.

[0056] An advantageous development of the method can also provide that the functional mass is provided with a layer thickness on the base element and / or the battery cell, so that the at least one spacer element of the positioning device for positioning the battery cell protrudes relative to the functional mass.

[0057] Preferably, the functional mass can be provided with a layer thickness on the base element and / or the battery cell, in which the at least one spacer element of the positioning device for positioning the battery cell protrudes at least about 1 mm, preferably at least about 5 mm, and / or at most about 20 mm, preferably at most about 10 mm, relative to the functional mass.

[0058] For example, the contact section formed by the end sections of the at least one spacer element can protrude at least approximately 1 mm, preferably at least approximately 5 mm, and / or at most approximately 20 mm, preferably at most approximately 10 mm, from the functional mass, or in other words, be arranged above the level of the functional mass.

[0059] In an alternative embodiment of the method, it can also be provided that the functional mass is provided with a layer thickness on the base element and / or the battery cell, in which the at least one spacer element of the positioning device and / or the end section of the at least one spacer element forming the contact section for the battery cell is arranged completely within the functional mass, for example at least approximately 1 mm, preferably at least approximately 5 mm, and / or at most approximately 20 mm, preferably at most approximately 10 mm, is arranged within the functional mass, or in other words, is arranged below the level of the functional mass.

[0060] In a particularly preferred embodiment of the method, the connection by the functional mass can be formed as a thermal and / or structural active connection between the base element and the battery cell positioned at the defined positioning distance from the base element.

[0061] The thermal active connection is to be understood in particular as meaning that the functional mass with a defined thermal conductivity is provided between the battery cell and the base element, so that during battery operation an effective heat dissipation of the battery heat generated by the battery cell to the base element is provided.

[0062] The structural active connection is to be understood in particular as meaning that the functional mass with defined strength properties and / or adhesion properties is provided between the battery cell and the base element, so that the battery cell is fixed to the base element and / or housing by the functional mass.

[0063] An advantageous further development of the method can therefore provide that the functional compound is provided as a thermally conductive compound, a potting compound and / or an adhesive compound on the base element and / or the battery cell.

[0064] The object is also achieved by a battery unit comprising a housing, a battery cell and a positioning device for positioning the battery cell in an interior of the housing, wherein the battery unit is designed according to one of the previously described embodiments of the method.

[0065] The battery unit is, in particular, a battery unit intended for use in a motor vehicle, for example, an electric vehicle or a hybrid vehicle. The housing forms, in particular, a battery housing for accommodating one or more battery cells.

[0066] The housing may be formed from one or more housing components. Preferably, the one or more housing components form a housing shell.

[0067] The housing may have a base element and / or a cover element.

[0068] The positioning device for positioning the battery cell in the interior of the housing can be coupled to the housing in any manner. For example, the positioning device can be detachably or permanently coupled to the housing, e.g., by a plug-in connection, snap-in connection, clamp connection, adhesive connection, welded connection, screw connection, rivet connection, or the like.

[0069] For example, holding devices for attaching the positioning device can also be provided on the housing, in particular on the inner walls of the housing that define the interior space. The holding devices can be formed integrally with the housing or attached to the housing as separate devices.

[0070] Preferably, the positioning device for positioning the battery cell in the interior of the housing can be fixed by a potting compound.

[0071] By positioning the battery cell relative to the base element by the positioning device, it can be ensured that the battery cell is positioned at the defined positioning distance from the base element when the battery cell is connected to the base element by the functional mass.

[0072] Due to the connection of the battery cell to the base element by the functional mass, the thermal connection for optimized heat dissipation between the battery cell and the base element and / or the structural connection for fixing the battery cell in the interior of the housing can be formed. Further preferred features and / or advantages of the invention are the subject of the following description and the drawings of exemplary embodiments.

[0073] The figures show:

[0074] Fig. 1 is a schematic partial sectional view of a battery unit according to an embodiment of the disclosure;

[0075] Fig. 2 is a schematic detailed sectional view of the battery unit according to the

[0076] Detail A in Fig. 1.

[0077] Identical or functionally equivalent elements are provided with the same reference numerals in all figures.

[0078] Fig. 1 shows a schematic partial sectional view of an exemplary embodiment of a battery unit designated as a whole by 100 and Fig. 2 shows a schematic detailed sectional view of the battery unit 100 according to detail A in Fig. 1.

[0079] Such a battery unit 100 can be designed in particular for use in a motor vehicle, for example, an electric vehicle or a hybrid vehicle. Alternatively, the battery unit 100 can also be intended for any other mobile or stationary application.

[0080] The battery unit 100 comprises a housing 102, a battery cell 104 and a positioning device 106 for positioning the battery cell 104 in an interior space 108 of the housing 102.

[0081] The housing 102 is in particular a battery housing for accommodating one battery cell 104 or several battery cells 104.

[0082] The housing 102 may consist of one or more housing components, which preferably form a housing shell of the housing 102.

[0083] The housing 102 may include a base member 110 and a cover member 112. The housing 102 may include a reinforcement structure 114 to increase the strength of the housing 102.

[0084] At least one electrical connection (not shown in detail) for an electrical connection to the battery cell 104 arranged in the interior 108 of the housing 102 can be provided on the housing 102.

[0085] A base element 116 is provided in the housing 102, which forms a cooling structure and / or a fastening structure for the battery cell 104.

[0086] The base element 116 can, for example, form a frame through which or to which the battery cell 104 can be fixed in the interior 108 of the housing 102.

[0087] The base element 116 can be formed, at least in part, by at least one flat component, e.g., a sheet metal element, a flat metal, or the like, so that the base element 116 has a compact, particularly flat, design. This allows the base element 116 to occupy the smallest possible space in the interior 108 of the housing 102.

[0088] In particular, the base element 116 is at least partially formed from a metallic material, for example a light metal or the like, a plastic material or a composite material.

[0089] The base element 116 can be formed from one or more such preferably flat components.

[0090] The base element 116 can also be designed as a hybrid component, which consists partly of a metallic material and partly of a composite material and / or plastic.

[0091] The base element 116 can form a structure that is preferably configured to correspond to the interior 108 of the housing 102, for example, a box-shaped structure or the like. The base element 116 can be inserted into the interior 108 of the housing 102 and can be detachably or permanently coupled to the housing 102 by any desired connection arrangement.

[0092] For example, the base element 116 can be coupled to the housing 102 by a plug connection, a snap connection, a clamp connection, an adhesive connection, a welded connection, a screw connection, a rivet connection or the like.

[0093] Alternatively, it may also be provided that the base element 116 is formed integrally with the housing 102.

[0094] For example, the base element 116 may be formed integrally on an inner wall of the housing 102 and / or on the bottom element 110 and / or the cover element 112.

[0095] In particular, the base element 116 can be fixed in the interior 108 of the housing 102 by a potting compound.

[0096] By means of the positioning device 106 provided in the interior 108 of the housing 102, the battery cell 104 is positioned at a defined positioning distance Z from the base element 116.

[0097] The positioning device 106 accordingly forms a defined distance between the battery cell 104 and the base element 116, so that an intermediate space 118 is formed between them for a functional mass 120, which will be described in more detail later, for connecting the battery cell 104 to the base element 116.

[0098] The positioning device 106 has at least one spacer element 122, by means of which the battery cell 104 is positioned at the defined positioning distance Z from the base element 116.

[0099] The spacer element 122 can be formed as a separate component or integrally with the base element 116, the housing 102, or another component. Preferably, the spacer element 122 is formed from the base element 116, integrally formed therewith, and / or attached thereto.

[0100] The spacer element 122 is designed in particular as an elevation, projection or the like with respect to the base element 116.

[0101] According to the embodiment shown in Figs. 1 and 2, the spacer element 122 is designed as a pin, pin, stamp or the like and extends from the base element 116 towards the interior 108 of the housing 102.

[0102] In an alternative embodiment not shown in detail, the spacer element 122 can also be designed as a rib extending longitudinally to the base element 116, a rib-shaped structure or the like, which is formed from the base element 116, formed thereon or attached thereto.

[0103] The spacer element 122 may preferably extend at least about 5 mm, preferably at least about 10 mm, and / or at most about 50 mm, preferably at most about 30 mm, from the base element 116 toward the interior space 108 of the housing 102.

[0104] The term "approximately" is understood to mean, in particular, a deviation of no more than 20%, for example no more than 10%, of the respective stated value.

[0105] An end section of the spacer element 122 or an end face of the spacer element 122 forms a contact section 124 which is spaced at the defined positioning distance Z from the base element 116.

[0106] Depending on the design (a length) of the spacer element 122, the contact section 124 can be formed at a distance of at least about 5 mm, preferably at least about 10 mm, and / or at most about 50 mm, preferably at most about 30 mm, from the base element 116.

[0107] The spacer element 122 is preferably made of a plastic material, for example, a thermoplastic. Alternatively, the spacer element 122 can also be made of a metallic material or a composite material.

[0108] In particular, the positioning device 106 has a plurality of spacer elements 122 (only one spacer element 122 is shown in Figs. 1 and 2) which are arranged at a distance from one another on the base element 116.

[0109] Due to the plurality of spaced-apart spacing elements 122, the contact section 124 can be formed by a plurality of contact areas distributed over a surface. This can provide planar support for the battery cell 104 in order to position the battery cell 104 at the defined positioning distance Z from the base element 116.

[0110] For attaching the spacer element 122 to the base element 116, a fastening section 126 is provided thereon.

[0111] The fastening section 126 is preferably formed as an opening 128 in the base element 116, into which the spacer element 122 is inserted.

[0112] If the positioning device 106 has a plurality of spacer elements 122, the fastening section 126 can be formed by a corresponding number of correspondingly designed openings 128, into each of which a spacer element 122 is preferably inserted.

[0113] If the fastening section 126 has a plurality of openings 128, these are formed in particular at a distance from one another in the base element 116, so that the contact section 124 for the battery cell 104, which extends flatly relative to the base element 116, is formed by the plurality of spacer elements 122 inserted into the openings 128.

[0114] The opening 128 can have any desired cross-section, which is preferably configured to correspond to the geometry of the spacer element 122. For example, the opening 128 in the base element 116 can be formed in a hole-like manner, e.g., with a round, oval, or polygonal cross-section.

[0115] As shown in Figs. 1 and 2, the spacer element 122 designed as a pin, pin, stamp or the like can be inserted into such a hole-shaped opening 128.

[0116] In an alternative embodiment not shown in detail, the opening 128 can also be formed in the shape of a slot in the base element 116, e.g. with a passage cross-section extending longitudinally in the base element 116.

[0117] A spacer element 122, which is designed as a rib, rib-shaped structure or the like, can be inserted into such a slot-shaped opening 128.

[0118] As already mentioned above, the defined positioning distance Z between the battery cell 104 and the base element 116 forms the intermediate space 118 for providing the functional mass 120.

[0119] By providing the functional mass 120 between the battery cell 104 and the base element 116, a connection of the battery cell 104 to the base element 116 is formed, by which a thermal and / or structural operative connection is formed between the battery cell 104 and the base element 116.

[0120] The functional compound 120 can be a thermally conductive compound (thermal paste) as well as a potting compound and / or an adhesive compound.

[0121] The thermal active connection is formed by connecting the battery cell 104 to the base element 116 by means of the thermally conductive compound.

[0122] Through this thermal operative connection, battery heat can be dissipated from the battery cell 104 via the thermally conductive compound to the base element 116 during operation of the battery cell. The base element 116 can be designed as a thermally conductive element, for example, a cooling plate, or can comprise one through which the battery heat can be dissipated to the housing 102 or an environment. Such a thermally conductive element can preferably be formed from a metallic material, for example, copper, a light metal, or the like.

[0123] The structural active connection is formed by connecting the battery cell 104 to the base element 116 by means of the potting compound and / or the adhesive compound.

[0124] The potting compound and / or adhesive compound can have defined strength and / or adhesion properties in order to form the structural operative connection and to fasten the battery cell 104 to the base element 116 or the housing 102.

[0125] The provision of the functional mass 120 in the intermediate space 118 between the base element 116 and the battery cell 104 can occur either before the positioning of the battery cell 104 on the positioning device 106 or after the positioning of the battery cell 104 on the positioning device 106.

[0126] If the functional mass 120 is provided on the base element 116 before positioning the battery cell 104 on the positioning device 106, it can be provided on the base element 116 with a layer thickness that either approximately corresponds to the defined positioning distance Z or is slightly thinner.

[0127] Preferably, it can be provided that the functional mass 120 has a layer thickness at which the one or more spacer elements 122 protrude slightly relative to the functional mass 120, so that the contact section 124 is provided outside the layer of the functional mass 120.

[0128] For example, the functional mass 120 may have a layer thickness of approximately 50 mm or less, preferably approximately 30 mm or less, particularly preferably approximately 10 mm or less.

[0129] The functional mass 120 may have a layer thickness at which the one or more spacer elements 122 protrude from the functional mass 120 by at least about 1 mm, preferably at least about 5 mm, and / or at most about 20 mm, preferably at most about 10 mm.

[0130] If the functional mass 120 is provided on the base element 116 before positioning the battery cell 104 on the positioning device 106, the functional mass 120 can alternatively also be provided with a layer thickness that is thicker than the defined positioning distance Z.

[0131] Preferably, it can be provided that the functional mass 120 has a layer thickness in which the one or more spacer elements 122, in particular their end sections, lie slightly within the functional mass 120, so that the contact section 124 is provided within the layer of the functional mass 120.

[0132] In this way, it can be achieved that the functional mass 120, which has a certain flowability, is partially displaced by the battery cell 104 by positioning the battery cell 104 on the positioning device 106.

[0133] As a result, the battery cell 104 can be embedded in the functional mass 120, whereby a secure and full-surface connection of the battery cell 104 to the functional mass 120 can be achieved, while the battery cell 104 is simultaneously positioned by the positioning device 106 at the defined positioning distance Z from the base element 116.

[0134] List of reference symbols

[0135] 100 battery units

[0136] 102 housings

[0137] 104 battery cells

[0138] 106 Positioning device

[0139] 108 Interior

[0140] 110 floor element

[0141] 112 cover element

[0142] 114 Reinforcement structure

[0143] 116 Base element

[0144] 118 space

[0145] 120 functional mass

[0146] 122 spacer element

[0147] 124 Annex section

[0148] 126 fastening section

[0149] 128 Opening Z Positioning distance

Claims

Patent claims 1. A method for forming a battery unit (100), comprising the steps of: - introducing a battery cell (104) into an interior space (108) of a housing (102) and positioning the battery cell (104) relative to a base element (116) in the interior space (108) of the housing (102), wherein the battery cell (104) is positioned at a distance from the base element (116) by a positioning device (106), - providing a functional mass (120) on the base element (116) and / or the battery cell (104), wherein the functional mass (120) is provided before and / or after the positioning of the battery cell (104), and - Forming a connection between the battery cell (104) and the base element (116) by means of the functional mass (120), while the positioning device (106) spaces the battery cell (104) from the base element (116).

2. Method according to claim 1, characterized in that the battery cell (104) is positioned at a defined positioning distance (Z) from the base element (116) formed by the positioning device (106).

3. Method according to claim 2, characterized in that the battery cell (104) and / or the base element (116) is brought into contact with at least one contact section (124) formed by the positioning device (106) in order to position the battery cell (104) at the defined positioning distance (Z) from the base element (116).

4. The method according to claim 3, characterized in that at least one spacer element (122) of the positioning device (106) is attached and / or formed on the base element (116) or on the battery cell (104), by which the at least one contact section (124) is formed.

5. Method according to claim 4, characterized in that the at least one spacer element (122) of the positioning device (106) is attached to a fastening section (126) provided on the base element (116) or on the battery cell (104). is attached, preferably the at least one spacer element (122) is inserted into an opening (128) provided on the base element (116).

6. Method according to one of claims 2 to 5, characterized in that the functional mass (120) is provided with a layer thickness on the base element (116) and / or the battery cell (104) which is equal to or smaller than the defined positioning distance (Z) formed by the positioning device (106).

7. Method according to one of claims 4 to 6, characterized in that the functional mass (120) is provided with a layer thickness on the base element (116) and / or the battery cell (104) such that the at least one spacer element (122) of the positioning device (106) for positioning the battery cell (104) protrudes relative to the functional mass (120).

8. Method according to one of the preceding claims, characterized in that the connection by the functional mass (120) is formed as a thermal and / or structural active connection between the base element (116) and the battery cell (104) positioned at the defined positioning distance (Z) from the base element (116).

9. Method according to one of the preceding claims, characterized in that the functional compound (120) is provided as a thermally conductive compound, a potting compound and / or an adhesive compound on the base element (116) and / or the battery cell (104).

10. Battery unit (100) comprising a housing (102), a battery cell (104) and a positioning device (106) for positioning the battery cell (104) in an interior space (108) of the housing (102), wherein the battery unit (100) is designed according to one of claims 1 to 9.

Images