Production of a battery with a housing

Abstract

The invention relates to a method for producing a battery having a battery element composite having at least one battery element and a housing surrounding the battery element composite, the housing comprising a base housing (8) which delimits a housing interior (11) for at least partially accommodating the battery element composite and which has a housing opening (20), the base housing (8) has a housing opening (20) through which the battery element composite is brought into the housing interior (11), the housing opening (20) being immediately closed by a cover plate of the housing, characterized in that the base housing (8) is produced by cutting a blank, the shape of which is designed such that the shape comprises the shapes of two of the base housings (8).

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a battery. Background Art

[0002] A battery is a storage device for electrical energy on an electrochemical basis, in which the stored chemical energy is converted into electrical energy by an electrochemical redox reaction during discharge. In the context of the present invention, batteries are understood to include both so-called disposable batteries (which are only provided for a single discharge and not for repeated charging) and so-called secondary batteries or accumulators (which can be provided and correspondingly designed for multiple charging). In this case, the charging of a secondary battery is the electrolytic reversal of the electrochemical redox reaction that occurs during discharge, which is achieved by applying a voltage.

[0003] The battery comprises one or usually a plurality of battery elements, which are arranged in a thin film shell or shell-like shell, which is often referred to as a "pouch". The battery element accordingly comprises two electrodes, a separator (sometimes also referred to as a separator) arranged between the electrodes for electrical isolation of the electrodes, and an electrolyte used as an ion conductor. The two electrodes of the battery element are distinguished in view of the enclosed active material, whereby one electrode acts as an anode and the other electrode acts as a cathode (correspondingly with respect to the discharge of the battery cell). In addition, the battery usually comprises two battery poles, which are integrated into the shell and are electrically conductively connected to the electrodes via so-called conductors on the inner side of the shell. Here, all electrodes acting as an anode are connected to one of the battery poles and electrodes acting as a cathode are connected to the other of the battery poles.

[0004] The design of a battery with a housing can have the advantage of a higher structural loadability of the battery than a battery with a film housing. The housing of the battery is often made of metal, especially aluminum, in order to achieve a sufficiently high structural strength and thus loadability in combination with a relatively low weight while being easy to manufacture and cost-effective.

[0005] In the production of batteries with a housing, a composite comprising one or more battery components is usually introduced into a basic housing (the so-called housing cup), which for this purpose also has at least one housing opening, which is finally closed by means of a cover of the battery housing. In the case of a housing made of metal, at least one cover is usually welded to the basic housing. This form of battery production is associated with considerable costs. This also applies in particular to the introduction of the battery component composite into the housing cup, which must be carried out with a high degree of accuracy and care in order to avoid damage to sensitive parts of the battery component composite.

[0006] DE 10 2016 121 089 A1 discloses a method for producing a cuboid battery cell container open on one side by extrusion molding.

[0007] DE 10 2013 021 398 A1 describes a battery having a housing which is composed of two housing halves of identical shape.

[0008] GB 748 719 A describes a housing for a battery, which comprises a first housing part which is cup-shaped and open on one side and a cover plate as a second housing part. The cover plate is held in the first housing part in a form-fitting manner in that the annular flange of the cover plate is snapped into a corresponding recess of the first housing part. Summary of the invention

[0009] The invention is based on the object of simplifying the production of a battery with a housing.

[0010] This object is achieved in a method according to patent claim 1. Preferred embodiments of the method according to the invention are the subject matter of the further patent claims and are apparent from the following description of the invention.

[0011] According to the invention, a method for producing (at least) one battery, in particular a lithium-ion battery and / or a battery provided as a traction battery for a motor vehicle and / or a solid-state battery is provided. The battery to be produced comprises at least one battery component composite with one battery element or preferably a plurality of battery elements, and comprises a housing that (completely) surrounds the battery component composite. The housing comprises a base housing, which delimits a housing interior for at least partially, preferably completely accommodating the battery component composite, and which has a housing opening, through which the battery component composite is introduced into the housing interior, wherein the housing opening is subsequently closed with a cover of the housing.

[0012] According to the invention, the basic housing is produced by cutting a blank, the shape of which is configured in such a way that it includes the shapes of at least or preferably exactly two of the basic housings, which are preferably connected together in one piece or in a uniform material. The cutting can be carried out, for example, in particular by cutting, then in particular by laser cutting or cutting (for example by sawing). It can be provided that substantially no material waste or material loss is generated, so that the shape of the blank can then substantially correspond to the shape of the two basic housings. Alternatively, it can also be provided that the blank includes additional material or at least one additional section, which is not part of the shape of the two basic housings. It can be particularly preferably provided that post-processing of the basic housing after cutting the blank is not necessary or is necessary only at the cutting location.

[0013] By cutting the blank, an advantageously designed basic housing and in particular two identical basic housings can be obtained in a relatively simple manner, whereby an advantageous and in particular cost-effective producibility of the at least one battery can be achieved.

[0014] Since two identical basic housings can be obtained by cutting the blank, it can be advantageously provided within the scope of the method according to the invention that two basic housings are used for producing a battery according to the method according to the invention. The production costs for the battery housing can thus be almost halved for each battery.

[0015] The housing is preferably designed to be dimensionally stable. In this context, a housing is considered to be “dimensionally stable” if its three-dimensional shape does not collapse due to its own weight in the absence of external loads. Preferably, such a housing can be designed to be dimensionally stable in such a way that it does not collapse in the case of loads caused by external forces occurring in normal use of the battery and particularly preferably does not deform to a relevant extent.

[0016] The housing can preferably be designed in such a way that it is ultimately sealed in a gas-tight manner, which can have a positive effect with regard to the performance and operational safety of the battery.

[0017] At least one battery element of the battery element complex of the battery to be manufactured according to the present invention comprises (each) two electrodes, a diaphragm arranged between the electrodes for electrical isolation of the electrodes, and an electrolyte serving as an ion conductor between the electrodes. The electrolyte can be designed in liquid or solid form, and in particular in the case of a solid-state design it also serves as a diaphragm. In addition, the battery to be manufactured according to the present invention may comprise a first battery pole and a second battery pole, wherein the battery pole is provided for electrically connecting the battery to an external circuit. For this purpose, the battery pole can be integrated into the housing in such a way that its first section is arranged outside the housing and is thus accessible for connection to an external circuit, while the second section inside the housing is used for electrical connection to one or more battery elements. Here, the first electrode of the (each) battery element is electrically connected to the first battery pole and the second electrode of the (each) battery element is electrically connected to the second battery pole. The battery element complex of the battery to be manufactured according to the present invention itself preferably does not include a housing and in particular does not include a (stable in shape) housing.

[0018] Preferably, it can be provided that the housing is partially or completely formed from at least and preferably exactly one metal, such as aluminum. As a result, a relatively highly load-bearing housing can be obtained relatively cost-effectively.

[0019] Preferably, the basic housing is produced in a rectangular shape on the outside and / or on the inside, since a blank whose shape includes the shape of two rectangular basic housings can be produced relatively easily. In addition, a basic housing with a rectangular shape and therefore also a housing can advantageously be combined with a battery component composite that also has a rectangular shape. Such a rectangular shape of the battery component composite can be derived in particular from the fact that the components of the battery components (electrodes and separators) themselves are designed in a rectangular shape (in particular with a relatively small thickness) and are stacked via their main sides (Groβseite, sometimes also called large faces). In addition, the rectangular shape of the housing makes it possible to use the battery advantageously in view of the required space requirements.

[0020] The cuboid and thus also cuboid-shaped housing has a length, a width and a height, wherein according to the invention the length is the largest of the (edge) dimensions, the width is the middle and the height is the smallest (if there are corresponding differences). The cuboid and thus also cuboid-shaped housing then comprises two main sides bounded by the length and the width, two longitudinal sides bounded by the length and the height. The battery poles of the battery can preferably be integrated into only one of the end sides or into both of them.

[0021] Advantageously, it can be provided that the housing opening is at least also formed in the main side of the cuboid basic housing, wherein the housing opening particularly preferably extends over substantially (that is to say with the exception of the wall thickness of the longitudinal side and the end side) the entire main side. This allows the battery component composite to be introduced relatively easily into the basic housing. This is particularly applicable because it makes it possible that a relatively high pressure is applied to the battery component composite only with the closure of the housing opening. Such a relatively high pressure (for example at least 3.5 bar) can be necessary or advantageous for the functional effectiveness of the battery, especially in the case of one or more battery components with a solid electrolyte (and therefore the battery as a so-called solid-state battery). This pressure acts in the stacking direction when the components of one or more battery components are arranged in a stacked manner.

[0022] According to a preferred embodiment of the method according to the invention, it can be provided that the blank is produced with an opening or incomplete closure, thereby making it possible to produce the blank relatively easily as a hollow body. It can also be further preferably provided that the opening is formed at the end side of the blank having a cuboid shape, which can have an advantageous effect with regard to the manufacturability of a blank with a shape comprising the shape of two basic shells connected to one another in one piece. The opening of the blank can then further preferably be a housing opening or a section of a housing opening of the basic shell or each of the two basic shells. In this case, the housing opening or a section thereof can preferably be arranged in the end side of the basic shell.

[0023] According to a preferred embodiment of the method according to the invention, it can be provided that a first section of the housing opening of the basic housing is first closed with a first cover part and then a second section of the housing opening is closed with a second cover part. In this case, the first section of the housing opening can particularly preferably be arranged in the case of a design with a cuboid shape in the end side of the basic housing, while the second section of the housing opening is arranged in the main side of the cuboid housing. In this case, the first cover part can preferably include one or more, particularly preferably all, battery poles of the battery, which makes it possible to connect the battery poles to the battery component composite in an electrically conductive manner before the housing opening is completely closed by means of the second cover part. For this purpose, it can be provided that the electrical conductors of the battery component composite are mechanically connected, for example welded, to one or more battery poles.

[0024] According to a preferred embodiment of the method according to the invention, it can be provided that the housing opening is closed with a single, preferably one-piece cover plate. This keeps the production costs for the battery relatively low.

[0025] The blank used in the context of the method according to the invention can advantageously be produced by extrusion (according to DIN 8583), in particular cold extrusion. This makes it possible to produce a blank with a shape that includes the shapes of the two basic housings in a relatively cost-effective manner.

[0026] According to one embodiment of the method according to the invention, provision can be made for the deformation element to be introduced into the housing interior before the housing opening is closed in such a way that it is ultimately arranged between the battery component composite and the housing, in particular one of the main sides of the housing which is designed in the form of a cuboid. A deformation element is understood to be a component which is provided (primarily or exclusively) to compensate for different expansions of the battery component composite on the one hand and of the housing on the other hand by deformation. This makes it possible to always position the electrodes and the separator in the housing without gaps and at the same time to allow a relatively greater expansion of these components compared to the housing.

[0027] According to a preferred embodiment of the method according to the invention, it can be provided that the base housing is produced with at least one contact surface for contacting the cover plate. This allows advantageous positioning of the cover plate, in particular during the subsequent closing of the cover plate with the base housing, which can be achieved in particular by material bonding, particularly preferably by welding, in particular by laser welding.

[0028] The connection of the basic housing to the cover plate can in principle be provided as follows, wherein such a connection can also be realized solely or additionally in a form-fitting and / or force-fitting manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be explained in more detail below with the aid of the embodiments shown in the accompanying drawings. In the accompanying drawings, partly in simplified diagrams:

[0030] Figure 1 A blank manufactured according to the invention for a battery is shown;

[0031] Figure 2 A section of the blank is shown in an enlarged view;

[0032] Figure 3 Two basic housings for the battery to be produced according to the invention are shown, which are formed by cutting out of a blank;

[0033] Figure 4 Shown are one of the basic housings and a first cover part which is connected to the basic housing within the scope of carrying out the method according to the invention;

[0034] Figure 5 The figure shows the closing of a section of a housing opening of a basic housing by a second covering part within the scope of carrying out the method according to the invention;

[0035] Figure 6 The connection of a basic housing to a cover plate according to an alternative embodiment is shown within the scope of carrying out the method according to the invention;

[0036] Figure 7 The connection of a base housing to a cover plate according to a further alternative embodiment is shown within the scope of carrying out the method according to the invention;

[0037] Figure 8 One of the batteries manufactured according to the present invention is shown;

[0038] Fig. 9 shows a section of a blank provided for use in the production according to the invention of a battery according to an alternative embodiment;

[0039] Fig.10 A section of a base housing for a battery to be produced according to the invention is shown, which is cut according to Fig. 9 to obtain the blank;

[0040] Fig.11 A first cover element is shown in a top view according to an alternative embodiment for use in the production according to the invention of a battery;

[0041] Fig.12 The side view shows the Fig.11 and

[0042] Fig.13 A battery component composite is shown in the context of production according to the invention, which is provided for use in one of the batteries. DETAILED DESCRIPTION

[0043] Figure 1 and 2 A blank 1 is shown, which is used in the context of the method according to the invention for producing a battery. The blank has a cuboid shape with two main sides 2, two longitudinal sides 3 and two end sides 4. An opening 5 is formed at one of the end sides, which extends approximately over the entire end side 4, that is to say with the exception of the wall thickness of the walls forming the main sides 2 and the longitudinal sides 3 of the blank. On the inside, the blank 1 is provided with a structure with a contact surface 6 formed therein, against which a cover plate 7 can rest, which should in turn be part of the housing of the battery when the blank 1 is cut in the middle along the two longitudinal sides 3 and the closed end sides 4 in order to form two basic housings 8 (see FIG. 1 ). Figure 3 The contour is provided on the one hand in the form of two groove-shaped recesses 9, which extend on the inside and in the center in the wall of the longitudinal side 3 in the longitudinal direction of the blank 1, and on the other hand in the form of two steps (absatz, sometimes also called shoulders) 10, which are each formed in a U-shaped manner in the end face 4 of the blank 1 surrounding the opening 5. After cutting, the recesses 9 in the longitudinal side 3 of the blank 1 are also formed as steps 10 in the wall of the longitudinal side 3 of the basic housing 8.

[0044] Each of the basic housings 8 or the housing interior 11 formed thereby serves to accommodate a respective battery component composite 12 . For this purpose, the battery component composite 12 is introduced into the housing interior 11 via a housing opening 20 of the basic housing 8 .

[0045] according to Fig.13, the battery component composite 12 may include a plurality of battery components. The electrodes 13 and the separators 14 of the battery components may be stacked. Then, the battery component composite 12 includes a plurality of first electrodes (13a) of the electrodes 13 that act as anodes in the case of battery discharge and a plurality of second electrodes (13b) of the electrodes 13 that act as cathodes in the case of battery discharge in an alternating arrangement. Due to the alternating arrangement of the electrodes 13, each first electrode 13a is arranged between two second electrodes 13b and each second electrode 13b is arranged between two first electrodes 13a. Here, the adjacent electrodes 13 are spatially separated by one of the separators 14 and are thus also electrically insulated from each other. Each first electrode 13a and each second electrode 13b and the separator 14 arranged therebetween constitute a battery component. Due to the stacking, it is obtained that, except for the two electrodes 13 placed on the outermost sides in the stack, each electrode 13 is functionally a component of two battery components.

[0046] Furthermore, the battery element may include an electrolyte. Here, the separator 14 may be impregnated with a liquid electrolyte. Alternatively, the separator itself may function as a (solid) electrolyte. Through the electrolyte, the conduction of ions between adjacent electrodes 13 may be achieved via the separator 14 respectively located therebetween.

[0047] Each of the electrodes 13 comprises a flat, film-like substrate 15, which can be designed, for example, from copper in the case of a first electrode 13a provided as an anode and from aluminum in the case of a second electrode 13b provided as a cathode. In its rectangular section, the two main surfaces of each electrode 13, which lie in the stacking direction of the battery element composite 12, are A coating of active material 16 is provided in order to enable the different electrodes 13a, 13b to function as anodes or cathodes during use of the battery. In the region of the substrate 15 and thus of the rectangular sections of the electrodes 13, these and the correspondingly rectangularly shaped separators 14 are stacked, resulting in the cuboid shape of the battery element composite 12.

[0048] At the lateral sides of the rectangular section of each electrode 13, a region of the substrate 15 is provided in which it is not provided with a coating of the corresponding active material 16. This region of the electrode 13 serves as an electrical conductor 17, via which the individual electrodes 13 are electrically conductively connected to the corresponding associated battery pole 18 of the battery. The electrical conductors 17a of all first electrodes 14a (summarized as a stack of electrical conductors) are connected here to a first battery pole (18a) of the battery poles 18, and the electrical conductors 17b of all second electrodes 13b (likewise summarized as a stack of electrical conductors) are connected to a second battery pole (18b) of the battery poles 18 (see Figure 6 ).

[0049] After the introduction of the battery component composite 12 and optionally also the deformation element 19 (see Figure 5 and 6 ), the housing opening 20 of the basic housing 8, which extends approximately completely through the main side 2 and the end side 4 of the basic housing 8, is closed by means of the cover plate 7. Figure 4 and 5 In the case of a design form, the cover 7 comprises two separate completely flat or flatly shaped cover parts 7a, 7b, while in the Figures 6 to 8 In the case of a design of , a one-piece, curved cover plate 7 with an L-shaped cross-sectional profile in longitudinal section is used.

[0050] In accordance with Figure 4 and 5 In the case of a design of the embodiment of the present invention, the first cover part 7a, which covers the section of the housing opening 20 placed in the end side 4 of the base housing 8, is first positioned and fastened against the contact surface 6 of the base housing 8 there. In this case, the first cover part 7a can be temporarily or finally connected to the base housing 8 by material bonding. Before the battery component composite 12 is introduced into the housing interior 11 of the base housing 8, according to Figure 4 The first covering part 7 a can be mounted on the basic housing 8 . Alternatively, the battery component assemblage 12 can first be introduced into the housing interior 11 and only then the first covering part 7 a can be connected to the basic housing 8 .

[0051] The introduction of the battery component composite 12 into the housing interior 11 can advantageously be realized via these or these sections perpendicular to the housing opening 20, which are arranged in a main side 2 of the basic housing 8, whereby only a relatively short relative movement between these components is necessary. This makes it possible to introduce the battery component composite 12 into the housing interior 11 relatively easily, wherein the risk of damage to the components of the battery component composite 12 is also minimized.

[0052] Another major advantage of introducing the battery cell composite 12 through the section of the housing opening 20 formed in one main side 2 of the basic housing 8 (which simplifies the production of the battery) is that a relatively high pressure is only exerted on the battery cell composite 12 (in the stacking direction of the components of the battery cell composite 12) with the subsequent application of the cover 7 or the second cover part 7b. Such a relatively high pressure can be advantageous or necessary for operation, especially in the case of a design of a battery cell composite 12 with a solid electrolyte.

[0053] In accordance with Figure 4 and 5 In the case of a battery to be manufactured, the first cover plate 7a or in the case of a battery to be manufactured according to Figure 6 and 7The corresponding section of the cover 7 in the case of the battery to be produced comprises two battery poles 18 of the corresponding battery, which are integrated into the cover (piece) 7, 7a in such a way that one connection section of each is accessible on both sides of the cover (piece) 7, 7a, so that the battery poles 18 can be connected to the electrical conductors 17 and thus to the electrodes 13 of the battery component composite 12 on the one hand, and the battery 1 can be contacted externally on the other hand. In this case, at least one of the battery poles 18 is electrically insulated from the housing.

[0054] The connection of the battery pole 18 to the conductor 17 can be realized in principle in any manner, that is, for example, before or after the battery component assemblage 12 is introduced into the base housing 8 and the cover (piece) 7, 7a is mounted on the base housing 8, or after the battery component assemblage 12 is introduced into the base housing 8, but the cover (piece) 7, 7a has not yet been mounted. Figure 4 and 5 In the case of a battery to be produced, the connection of the battery poles 18 to the electrical conductors 17 can be realized after the first covering part 7 a has been mounted on the basic housing 8 , but before the battery component assemblage 12 has been introduced into the basic housing 8 .

[0055] This is followed by complete closure of the housing opening 20 of the basic housing 8 by the housing cover 7. Figure 4 and 5 In the case of the battery to be manufactured, the second cover part 7b is mounted on the base housing 8 for this purpose, wherein the second cover part rests on the corresponding contact surface 6, which extends in the longitudinal direction of the base housing 8. Figure 6 In the case of a battery to be manufactured according to , the entire cover plate 7 is, in contrast, pivoted (only) about the free edge of the end portion of the cover plate 7 until the cover plate 7 is completely in contact with the contact surface 6 of the base housing 8. Figure 7 In the case of the battery to be produced, the cover plate 7 is mounted, in contrast, in a purely translational relative movement to the housing base 8. A combination of rotational and translational movement of the cover plate 7 is likewise possible and may be advantageous.

[0056] In the last method step, the cover plate 7 (if not already done) is connected to the basic housing 8 in a corresponding materially bonded manner. This can advantageously be done by laser welding. Figure 4 and 5 The battery to be manufactured according to the invention has the advantage that the two weld seams which can be arranged for connecting the two cover parts 7a, 7b are respectively placed in a single plane, so that the laser for welding only has to be moved in two dimensions. Figure 6 and 7 In the case of a battery to be produced, a three-dimensional movement of the laser may be necessary, which is caused by the bent shape of the corresponding cover plate 7 .

[0057] Fig. 9 An alternative embodiment of a blank 1 for use in the production according to the invention of a battery is shown. Figure 1 and 2 The difference between the blank 1 and the base shell 8 is that the recess 9 extending in the longitudinal direction of the blank 1 in the middle of the wall of the longitudinal side 3 is supplemented by a further recess 9 which is formed in the middle of the wall of the closed end side 4 of the blank 1 and transitions into the recess 9 on the longitudinal side. As a result, in each of the two basic shells 8 obtained by cutting the blank 1, an additional contact surface 6 is obtained, which is formed as a step in the end wall there (see Fig.10 ).

[0058] Fig.11 and 12 An alternative design of the first cover member 7a is shown, which is Figure 4 and 5 Relative to the first cover plate member 7a (such as its Figure 4 and 5 ), according to Fig.11 and 12 The first cover part 7 a has a step 10 which in turn forms a contact surface 6 against which the second cover part 7 b rests after assembly.

[0059] Reference numerals list

[0060] 1 Billet

[0061] 2 Main side of the cuboid

[0062] 3 Longitudinal side of the cuboid

[0063] 4 Ends of the cuboid

[0064] 5. Opening of the blank

[0065] 6. Contact surface

[0066] 7 Cover

[0067] 7a First cover member

[0068] 7b Second cover plate member

[0069] 8 Basic shell

[0070] 9 Recess

[0071] 10 steps

[0072] 11 Shell cavity

[0073] 12 Battery component composite

[0074] 13 Electrodes

[0075] 13a First electrode

[0076] 13b Second electrode

[0077] 14 Diaphragm

[0078] 15 Electrode substrate

[0079] 16 Active materials of electrodes

[0080] 17 Conductors

[0081] 17a First conductor

[0082] 17b Second conductor

[0083] 18 Battery terminal

[0084] 18a First battery pole

[0085] 18b Second battery pole

[0086] 19 Deformation element

[0087] 20 Shell opening

Claims

1. A method for producing a battery having a battery component composite (12) with at least one battery component and a housing surrounding the battery component composite (12), wherein: The housing comprises a basic housing (8), which limits a housing interior (11) for at least partially accommodating the battery component assembly (12) and has a housing opening (20), through which the battery component assembly (12) is introduced into the housing interior (11), wherein the housing opening (20) is subsequently closed with a cover plate (7) of the housing, characterized in that the basic housing (8) is manufactured by cutting a blank (1), the shape of the blank being constructed in such a way that it includes the shapes of two of the basic housings (8).

2. The method according to claim 1, characterized in that: The basic housing (8) is produced in the shape of a cuboid on the outside and / or on the inside.

3. The method according to claim 2, characterized in that The housing opening (20) is also formed at least in a main side of the cuboid basic housing (8).

4. The method according to any one of the preceding claims, characterized in that The blank (1) is manufactured with an opening (5).

5. The method according to claim 4, characterized in that The opening (5) is arranged at the end side of the blank (1) having a rectangular parallelepiped shape.

6. The method according to any one of the preceding claims, characterized in that The blank (1) is manufactured by extrusion molding.

7. The method according to any one of the preceding claims, characterized in that A first section of the housing opening (20) is initially closed by a first cover part (7a) and subsequently a second section of the housing opening (20) is closed by a second cover part (7b).

8. The method according to claim 7, characterized in that The first cover element (7a) comprises at least one battery pole (18).

9. The method according to any one of claims 1 to 6, characterized in that The housing opening (20) is closed by a single cover plate (7).

10. The method according to any one of the preceding claims, characterized in that A deformation element (19) is introduced into the housing interior (11) before the housing opening (20) is closed in such a way that it is subsequently arranged between the battery component assembly (12) and the housing.

11. The method according to any one of the preceding claims, characterized in that The basic housing (8) is manufactured with at least one contact surface (6) for contacting the cover plate (7).

12. The method according to any one of the preceding claims, characterized in that The basic housing (8) and the cover plate (7) are integrally connected to one another.

13. The method according to any one of the preceding claims, for producing two batteries, characterized in that By cutting the blank (1), two basic housings (8) are obtained, which are respectively used to produce a battery.

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