EP2467885A1

EP2467885A1 - Galvanic cell comprising a frame, and method for the production thereof

Info

Publication number: EP2467885A1
Application number: EP10744507A
Authority: EP
Inventors: Tim Schaefer; Andreas Gutsch
Original assignee: Li Tec Battery GmbH
Current assignee: Li Tec Battery GmbH
Priority date: 2009-08-17
Filing date: 2010-07-29
Publication date: 2012-06-27
Also published as: WO2011020546A1; JP2013502672A; US20120214055A1; DE102009037726A1; CN102484223A; BR112012002771A2; KR20120083287A

Abstract

Disclosed is a frame for a galvanic cell consisting of an electrode stack that has a foil-type package, out of which at least two current collectors are brought. Said frame is designed so as to be able to be fixedly connected to the package of the cell when the cell is produced. When producing such a galvanic cell, a frame is fixedly connected to the package as the package is sealed.

Description

Galvanic cell with frame and method for its production

Description

The present invention relates to a galvanic cell, comprising a frame and a method for its production. Are known flat and rectangular cells (battery cells, capacitors, etc.), whose electrochemically active content of a film-like packaging, such as a thin

Aluminum foil, which is plastic coated on both sides, is surrounded by the electrical connections in sheet form (so - called "arrester") are guided

Unlike other cell types, the packaging of such cells is not energized because the arresters are isolated through the package. Such constructed battery cells are also called pouch or as

Coffeebag cells called.

In various applications, e.g. in electric or hybrid vehicles, individual galvanic cells are connected in series and / or in parallel and are often in an enclosure with associated electronics. Because of the often not very high mechanical load capacity of the pouch cells welded into a foil, they often can not be inserted directly into the pouch

Battery housing to be installed, but must first be mechanically stabilized by suitable support structures.

The present invention has for its object to facilitate the application and the treatment of galvanic cells and to mitigate the problems associated with the sensitivity of their packaging film problems or possible to solve. This object is achieved by a product or a method according to one of the independent claims.

According to the invention, a frame is provided for a galvanic cell. The cell consists essentially of an electrode stack and a foil-like packaging from the at least two arresters are led out. The frame is designed so that it can be firmly connected to the packaging of the cell in the manufacture of the cell. In the method according to the invention for producing a galvanic cell, a frame is firmly connected to the packaging when the packaging is closed. In the following, some terms will be explained, which will be used in the further description in the invention.

The term electrode stack is used to designate the electrochemically active contents of a galvanic cell of any type. In contrast, the packaging of a cell is understood to mean the material which does not participate in the electrochemical reaction and which has the

Complete electrode stack from the environment.

If in this context of a film-like packaging is mentioned, then it should be understood as all types of packaging or inclusions, which serve the purpose of shielding the electrode stack with a preferably low material use effectively against the environment and complete. The conclusion should act against a transfer of matter and of electrical currents. However, this term does not exclusively include foils in the usual sense, in particular also plastic-coated metal foils. For the purposes of the present invention, electrical conductors which are routed through the packaging to the outside are referred to as arresters Transport of electrical charge into the cell or from the cell can take place.

A framework within the meaning of the present invention should be understood to mean any constructional device which is suitable for mechanically stabilizing the cell against environmental influences and which can be firmly connected to the packaging of the cell during the production of the cell. As the wording already indicates, a frame is preferably a substantially frame-shaped device, the function of which is essentially to impart mechanical stability to a galvanic cell. Advantageous developments of the invention will become apparent from the

Dependent claims.

In the following the invention will be described in more detail by means of preferred embodiments and with the help of figures. It shows

Fig. 1 is a view of an embodiment of an inventive

Cell with integrated frame from the front;

Fig. 2 is a view of the same embodiment from behind; Fig. 3 is an exploded view of this cell from the front and Figure 4 is an exploded view of this cell from behind.

Fig. 5 shows an embodiment of the invention in which the frame is welded to the outwardly extended inside of the packaging film; Fig. 6 shows an embodiment of the invention in which the frame is welded to the outside of the packaging film in the region of the seal of the two films;

Fig. 7 shows the basic structure of a typical packaging film

galvanic cells;

Fig. 8 shows the structure of a cell block of galvanic cells after a

Embodiment of the present invention;

9 is a view of a galvanic cell according to a

Embodiment of the present invention with a frame with holes for a tie rod and arresters, which partially around the

Frame bent and positively contacted are;

Fig. 10 is an exploded view of the cell shown in Fig. 9;

Fig. 11 is a view of a cell block of individual cells, wherein the

Tie rod was not shown; Fig. 12 is a sectional view of the cell block shown in Fig. 11;

13 shows the view of a cell according to the invention after another

Embodiment in which the arresters led out parallel to the weld of the film and are contacted non-positively;

Fig. 14 is an exploded view of the cell shown in Fig. 13; Fig. 15 is another exploded view of this cell; 16 shows various sectional views through a galvanic cell according to an embodiment of the invention and a Schπittführungsskizze.

17 is a sectional view through a cell after a

Embodiment of the invention with an enlargement of the frame area;

FIG. 18 shows a cell block made of cells according to FIG. 13; FIG.

Fig. 19 is a Schnittführungsskizze to explain the cutting guide in the

Production of the section shown in Fig. 20 and a further Schnittführungsskizze to illustrate the cutting guide in the production of the sections shown in Fig. 16.

FIG. 20 shows a sectional view through the cell block illustrated in FIG. 18; FIG. 21 shows an enlarged detail of the illustration in FIG. 20;

22 shows the welding of the edge of a pouch cell between the 2

Sealing bar (prior art) Figure 23 is a schematic representation of the welding of a pouch cell with a frame according to an embodiment of the invention, in which the connection of the outside of the packaging film of the cell with the frame is carried out simultaneously with closure of the cell. Fig. 24 is a schematic representation of the welding of a pouch cell with a frame according to an embodiment of the invention, in which the connection of the inside of the packaging film of Take the frame after the cell has already been welded shut;

Fig. 25 is a schematic representation of the welding of a pouch cell with a frame according to an embodiment of the invention, in which the connection of the outside of the packaging film of

Cell is made with the frame after the cell has already been welded shut;

26a shows the result of the welding shown in FIG

Inside the protruding packaging film of the cell with the frame, wherein the weld runs parallel to the cell, in one

Tilt;

Fig. 26b is an enlarged detail of Fig. 26a;

FIG. 27 shows a section through the frame region of FIG. 26a

illustrated embodiment; Fig. 28 is an exploded view of that shown in Fig. 26a

embodiment;

FIG. 29a shows a representation of the embodiment shown in FIG. 26a with a hatched representation of the joining surface to the frame;

FIG. 29b shows an enlarged detail of FIG. 29a; FIG. 30a shows the result of the welding shown in FIG

Inside the supernatant packaging film of the cell with the frame, the weld perpendicular to the cell, in an oblique view; FIG. 30b shows a detail enlargement of FIG. 30a;

Fig. 31 is a section through the frame portion of the in Fig. 30a

illustrated embodiment;

Fig. 32 is an exploded view of that shown in Fig. 26a

embodiment;

FIG. 33 a shows a representation of the embodiment shown in FIG. 30 a with a hatched representation of the joining surface to the frame; and

Fig. 33b is a partial enlargement of Figure 33a. The invention is based on a galvanic cell, which consists essentially of an electrode stack with a foil-like packaging, from which at least two arresters are led out. Such a galvanic cell is stabilized according to the invention by a frame which is designed so that it can be firmly connected to the packaging of the cell in the manufacture of the cell. With an appropriate embodiment of some embodiments of the invention, there is the advantage that the galvanic cells are stabilized not only when installed in a battery by a connection then to be produced with a frame or a frame, but that the cell before installation in a cell block by the frame according to the invention is stabilized. The inventive method, according to which the frame is already connected when closing the package with the cell has the further advantage that the cell already in the further manufacturing process, ie in their filling, in the formation, the aging ("aging") or the so-called "Grading" is already protected against mechanical influences. Depending on the intended use, in particular cohesive processes such as, for example, bonding or similar processes are suitable for producing the frame connection of the cell according to the invention. Preferably, the frame can also be connected by a hot pressing or heat sealing, which is preferably carried out by partial melting of a thermoplastic layer located between the joining partners with subsequent cooling under pressure, with the packaging film, which is often provided anyway with a corresponding coating suitable for this purpose ,

The term heat sealing is understood to mean a process for joining thermoplastic melt layers of packaging materials (eg.

Composite films), preferably by hot pressing. Heat sealing is an important method of welding films in packaging technology. Essentially one differentiates between the following two variants: a) sealing with heating rod or heating ruler between sealing jaws, also as

Contact sealing, and b) impulse sealing.

In the first variant, a preferably movable sealing jaw carries a heated rod. A preferably fixed lower sealing jaw is often equipped with a surface of elastic material to compensate for unevenness in the sealed seam. Sealing elements of this type are used in many commercially available machines for the production and closing of bags and in form, fill and seal machines.

In the case of very long sealing seams, the heating rods often have to be worked extremely accurately and without any deviation in order to ensure uniform pressure over the entire sealing surface. To achieve clean sealing seams, the films are often before using the sealing tool with the help of Stretching devices laid flat. Another possibility is the use of heating rods with saw-like sealing surface, but then there is a risk of hole formation.

For the resilient surface of the fixed, cold sealing jaw, silicone rubber has proven itself. Often you give this back pressure bar a slightly curved shape. During the sealing process, a pressure is initially built up in the middle of the sealing seam, which pressure spreads to the edges when the tool closes. So an optimal sealing seam is to be produced. In addition, small liquid droplets are to be pushed out of the sealing area, which would destroy the seal by the formation of water vapor.

In impulse sealing, the temperature of the sealing bars is maintained for a rather brief moment rather than the entire sealing cycle. The necessary heat is provided by two small resistance elements on both

Sealing jaws generated.

Once the sealing tool is closed over the film to be sealed, the welding is performed by a short burst. Compared to the hot bar seals, the time of exposure to heat is shorter and the

Excess heat is dissipated immediately. The sealing surface of the tool may still be covered by a thin, insulating film of heat-resistant material to prevent sticking of the sealed material.

By a large-scale connection of the packaging film to the frame can be mechanical stress peaks, which in the load of

Construction could otherwise easily arise, largely avoid. The connection to the frame can be made on the inside of the packaging film, which is often coated with polypropylene. Fig. 5 shows such a connection of the frame with the inside of the packaging film. According to another embodiment of the invention, it is also possible to connect the frame to the outside of the packaging, which is often coated with polyamide. Such an embodiment of the invention is shown in FIG. Furthermore, it is advantageous to make the closure of the cell, ie the connection of the two parts of the packaging film and the connection to the frame in one step.

In order to simplify the construction of a cell block from galvanic cells according to the invention, it is advantageous and therefore preferable to use the frame with corresponding shaping elements, such as e.g. Noses or countersinks to be provided which are arranged on, for example, two sides of the frame so that the corresponding form elements can fit into each other fitting and so the assembly of the cell block by a promotion of

support proper alignment of the cells. The frames of the invention may be provided at suitable locations preferably with holes or other openings, can be introduced through the tie rods that hold the cell block together.

Figures 1 to 4 show a preferred embodiment of the invention, in which the frame is preferably made of plastic and connected to the inside of the packaging film via a hot pressing. The connected to the frame half of the packaging film is in this embodiment over the other half circumferentially over, as shown in Fig. 5.

Fig. 1 shows a three-dimensional view of a cell after this

Embodiment with an integrated frame 102, with the

Packaging of the cell 103 is connected. Out of the packaging they protrude Arrester 101 of the cell. Fig. 2 shows the same cell from the other side.

Similarly, reference numerals 201, 202 and 203 designate the trap, the frame and the package of the cell. An exploded view of this cell with integrated frame is shown in FIG. 3. The cell stack 301, to which the cell head is electrically connected with its two electrode bundles 304, 305, and to which the arresters 302, 303 are attached, is entrained by a packaging foil from both sides Parts 306 and 307 closed, the

mechanically stabilized by a frame 308. A corresponding exploded view from the other side is shown in FIG. 4. Here, too, the electrode stack 401 with the electrode bundles 404, 405 and the arresters 402, 403 attached thereto from the two parts 406, 407 of FIGS

Enveloped wrapped and enclosed and stabilized by the frame 408.

The basic structure of a typical packaging film for galvanic cells is shown in FIG. 7. An aluminum foil 702 is coated on one side with a polyamide 701 and on the other side with a polypropylene 703. Other films with other materials, layers or coatings are of course possible.

A preferred embodiment of a cell block of integrated frame galvanic cells according to the present invention is shown in FIG. 8. A complete cell block 801 is constructed by being under construction

Cell block 802 further cells, e.g. the cell with frame provided with the reference numeral 803 is added. The cell 803 consists of the actual cell 804 with arresters 805, 806 frictionally with a

Frame 807 is connected. To stabilize the entire cell block, tie rods 808, 809, 810 and 811 are passed through corresponding holes in the frame.

If the frames are designed to be provided with structures such as tabs or grooves that provide centering or alignment of the cells facilitate, then the passage of the tie rods through the holes is greatly facilitated. In this embodiment, the arresters

weight-saving wrapped around the frame or bent around, whereby a massive contact strip is unnecessary. Fig. 9 shows a detailed illustration of such a cell with arresters wrapped around the frames. The cell 901 has an arrester 904 wrapped around the frame 902. The frame is with a hole 903 to

Implementation of tie rods provided. Fig. 10 shows the same cell in an exploded view. Unlike shown in the figure, the arrester 1004 is bent around the frame only after attaching the frame 1002. Fig. 11 shows a cell block of galvanic cells of this embodiment.

Fig. 12 is a sectional view of the cell block shown in Fig. 11; Attached to the cell head 1202 of a cell 1201 is an arrestor 1204, which is bent around the frame 1205 and electrically contacted with an arrester of the adjacent cell. The opposite arrester of the cell 1201 is not bent around the frame 1205 and therefore electrically insulated from the adjacent cell arrester 1206, which in turn electrically contacts a surge arrester of the next adjacent cell. In this way, it is possible to achieve a proper electrical connection of the arrester during cell block construction practically without further aids.

Still less space requires an embodiment of the invention shown in FIG. The arresters 1304 of the cell 1301 are led out of the packaging parallel to the weld and contacted non-positively. The frame 1302 has a bore 1303 for the passage of a tie rod. A

Exploded view of this embodiment is shown in FIG. 14. The packaging of the cell 1401 has at its corners special surfaces 1405 corresponding to a

Hot pressing with the frame 1402 are suitable. The arresters 1404 of the cell are in this case placed so that a proper contacting takes place automatically. The packaging corners of the cell may also have holes 1406 be provided for performing a tie rod, which are placed congruent with corresponding openings 1403 in the frame 1402. An exploded view of this embodiment is shown in FIG

Electrode stack 1501 with arresters 1502, 1503 is between a top 1506 of the package, a frame 1508 and a bottom 1507 of

Packaging included. Upper part and lower part of the packaging are equipped with mold elements shown in Fig. 15, which support an automatic intended contact with the arrester.

FIG. 16 shows three different cutting guides 16a, 16b and 16c through a galvanic cell shown in the lower part of FIG. 16a shows the section along the line 1907, FIG. 16b shows the section along the line 1906, and FIG. 16c shows the section along the line 1905. FIG. 16a shows the cell stack 1601 the cell heads 1602 and 1603, Fig. 16b shows the aperture 1605 through the frame 1604, and Fig. 16c shows the section through the cell perpendicular to Fig. 16a.

Fig. 17 shows an enlarged sectional view of the frame portion of this embodiment of the invention. Shown are the frame 1704 which is connected to both parts of the packaging film 702, 703 of the cell 701. Fig. 18 shows a cell stack of cells according to this embodiment of the invention. Fig. 20 shows a section through the cell block with the cut shown in the upper part of Fig. 19. FIG. 19 shows an enlargement of a section from this sectional view, in which it can be seen more clearly than in FIG. 20 that in this embodiment of the invention the space is used somewhat more efficiently. By recognizable in the upper part of Fig. 21 specific design of the arrester 2107, which electrically contacts the arrester 2108 of the adjacent cell, a nearly column-free structure of the cell block is made possible. Recognizable are the cell stack 2104, the

Bottom of the package 2105, the top of the package 2106, the frame 2101 and 2103 with the opening 2102nd For producing a galvanic cell according to the invention

preferably the frame and the packaging, preferably the

Packaging film, superimposed and pressed together, for example by heatable stamp or seal bar, i. preferably heat-sealed together by the action of external forces or otherwise connected in a materially cohesive manner. This procedure leads

preferably for partial melting of the thermoplastic film preferably located on the packaging film and / or for partial melting of the surface of the frame. For this purpose, the frame is preferably also made of a thermoplastic material, for example, at the joint.

Thermoplastics, also known as plastomers, are plastics that can be thermally deformed within a certain temperature range. This deformation can often be reversed, i. it can be repeated by re-heating, for example, to the molten state after cooling, as long as thermal decomposition of the material does not start as a result of overheating. In this capacity

Thermoplastics differ from so-called thermosets or elastomers. Another characteristic of thermoplastics is the weldability of these materials.

Thermoplastics can be welded under the influence of heat and pressure. The materials to be welded are heated beyond their melting temperature and brought into a flowable state.

After the heating of the components involved, the cooling of these materials can preferably be accelerated by an actively coolable sealing bar or an actively coolable stamp. Such actively coolable punches are described, for example, in US Pat. No. 4,145,485. However, the punches described in this document can only be cooled in a subarea in which the electrochemically active parts of the cell in the process of

Heat seal to protect against overheating.

The stamps or sealing bars described in this publication are not coolable in the area where heating takes place during heat sealing. In order to enable an efficient cooling of the sealing bars in the phase of cooling also in the area of heat sealing, the present invention provides according to one embodiment, for example, to heat the sealing bars with hot air and to cool for example with cool or cooled air. By a temporally successive injection of hot or cold air into cooling channels in the stamp or seal bar can be a rapid time sequence of temperatures in the stamps or

Reach sealing bars. Other than air can be used

Heat transfer agents, such as water or other fluids, which are particularly suitable for heat transfer can be used.

The temporally successive heating and subsequent cooling of individual points of a tool used for heat sealing can also be combined according to an embodiment of the invention with the described in US 4,145,485 permanent cooling in the area of the flat galvanic cell for the purpose of the electrochemically active parts of the cell to protect against overheating.

The welding or the heat sealing of the packaging with the

Frame is preferably carried out exclusively under the action of heat and external pressure forces without further additives. By a large-scale connection of the packaging film to the frame, the emergence of mechanical stress peaks in a mechanical load on the construction can be avoided. The connection of the film to the frame may preferably be made on the inside 703, 2309, 2310, 2409, 2410, 2509, 2510 of the packaging film, often with polypropylene is coated. Preferably, one side of the packaging film protrudes for this purpose - for example as shown in FIGS. 24 or 25.

According to an alternative embodiment of the invention, it is provided to bring the outside 701, 2308, 2311, 2408, 2411, 2508, 2511 of the packaging film for connection to the frame, which is often coated with polyamide. Preferably, the outside 701, 2308, 2311, 2408, 2411, 2508, 2511 of the wrapping film is also polypropylene or other

suitable thermoplastic material coated in the

Heat sealing process forms a material connection with the frame.

In other embodiments of the invention, it is intended to make the frame 2312, 2412, 2512 metallic. By a suitable modification of the plastic coating, it is also possible in this case, a

make cohesive connection with the packaging. Preferably, this will be done in a single step, in which simultaneously the different parts of the packaging film with each other and these are materially connected to the frame.

To simplify the construction or the formation of a cell block from a plurality of galvanic cells provides an embodiment of the invention, the frame with lugs, countersinks or recesses or other

Form design elements to be provided so that the galvanic cells are aligned laterally offset from each other in the formation of a cell block. It is also preferable to introduce holes for continuous tie rods in the frame, which align the cells and the frame during assembly and hold together the cell block after a tension. Fig. 22 shows a schematic representation of the welding of

Packing foil of galvanic cell at its edge between two

Sealing bars 2201, 2202. Under the influence of compressive forces 2205, 2206 and a simultaneous heating press the sealing bars 2201, 2202, the two sheets of packaging film against each other. The packaging film preferably consists of a middle layer 2203, 2204, which preferably consists of aluminum foil, and two outer layers 2208, 2209, 2210, 2211, which preferably consist of polyamide 2208, 2211 or preferably of polypropylene 2209, 2210. In the joining zone 2207, the polypropylene is partially melted by the action of heat, whereby the cohesive connection of the two parts of the cell package is carried out. This kind of

Cell sealing is basically known.

Fig. 23 shows schematically an embodiment of the

according to the invention welding of the packaging film with the frame with simultaneous closure of the packaging of the cell, preferably in a single step. The sealing bars or punches 2301, 2302 compress the two sheets of the packaging film 2308, 2309, 2303, 2304, 2310, 2311 by means of the pressing forces 2305, 2306 and under heat and also press the frame 2312 against the outside 2311 of FIG

Packaging film. Under the action of the compressive forces and heat takes place in the joining zone 2307 between the two sheets of the packaging film and the joining zone 2313 between the packaging film and the frame a partial melting of the thermoplastic materials located there, resulting in a cohesive connection between the leaves of the packaging film on the one hand and between a sheet of packaging film and the frame on the other hand leads in one step. Instead of a heated one

Sealing bar 2302 on the side of the frame can also be a simpler

Counterhold be provided at this point.

In the further exemplary embodiment of the present invention shown in FIG. 24, the two sheets 2403, 2404 of the packaging film are welded in a first step on their insides 2409, 2410 or onto others

Way cohesively connected. In a second step, the cohesive connection with the frame 2412, preferably by Heat sealing using sealing bars 2401, 2402, which, using external forces 2405, 2406 and heat, compress inner layer 2409 of the overhanging sheet of the cell wrapping film against frame 2412 and layer 2409 in joining zone 2413, preferably by partial melting Thermoplastic materials welded to the frame 2412 or otherwise bonded cohesively.

Not shown in FIG. 24 is a combination of the exemplary embodiments illustrated in FIGS. 23 and 24. In this advantageous combination, the coating 2411 of the packaging film 2404 is likewise adhesively bonded to the frame in the joining zone between the layer 2411 and the frame 2412 below the joining zone 2407. This is another mechanical stabilization of the galvanic cell using the

Frame achievable.

Fig. 25 shows schematically a further embodiment of the invention, in which the lower sheet 2504 of the packaging film over the upper sheet 2503 and has been connected in a first step with this upper worksheet materially. In a similar manner as in the previous embodiments, the cohesive

Connecting the lower sheet 2504 of the packaging film with the frame 2512 in the joining zone 2513, in which the punches 2501, 2502 under the action of greater forces 2505, 2506 under heat press the protruding sheet 2504 against the frame 2512. Here, the outer film 2511 and preferably also a corresponding thermoplastic layer on the frame 2512 in the joint zone 2513 partially melted whereby a

cohesive connection between the film and the frame is formed.

Also, this embodiment can be combined again with the embodiment shown in Fig. 23 in a manner not shown here in the figures, wherein a cohesive connection in a below the joining zone 2517 lying further joining zone can be achieved.

As a result of the method steps described, FIG. 26 a shows a galvanic cell 2601 and an enlarged detail 2602 in FIG. 26 b. Visible is the welding of the inside of the protruding

Packaging film 2604 with the frame 2605 and the edge 2603 in the package, which comes about through the supernatant of the upper packaging film on the lower packaging film.

Fig. 27 shows a sectional view in the frame area of this

Embodiment in which the two sheets of the packaging film with the respective layers 2708, 2709, 2710, 2711 in the joining zone 2707 are materially connected to each other and in the joining zone 2713 to the frame 2712 are materially connected. Preferably, also in the field of

Joining zone 2707 below the lower sheet of the film 2710, 2711 present a material connection with the frame, wherein this is preferably done by a combination in Figures 23 and 24 embodiments shown.

Fig. 28 schematically shows an exploded view of this

Embodiment with the galvanic cell 2801, its arresters 2803, 2804 and the edge of the packaging film 2806. The frame 2802 has particular structural elements 2805, for example in the form of

Recesses in the frame, which correspond in position to the arrangement of the arresters 2803, 2804, so that a proper contacting of these arresters can take place.

29a shows an oblique view of the rear side of a galvanic cell according to this exemplary embodiment, in which the joining surface to the frame is hatched. FIG. 29b shows an enlarged detail of the lower corner of this galvanic cell 2901 with the joining surfaces shown hatched 2905, 2906, 2907 to the frame. The arresters 2903, 29094 of this cell 2901 protrude partially out of the packaging film 2902.

FIG. 30 a shows the result of that illustrated in FIG. 24

Manufacturing process in the form of a galvanic cell 3001 and the

Enlarged section 3002 in Fig. 30b. Recognizable are the frame 3005 and the edges 3003, 3004 of the two sheets of packaging film.

Fig. 31 is a sectional view in the frame portion of the embodiment shown in Figs. 30a and 30b. The two sheets of the packaging film with the inner or outer layers 3108, 3109 or 3110, 3111 of the galvanic cell 3101 are connected to one another in the joining zone 3107, preferably heat-sealed. The sheet with the layers 3108, 3109 protrudes beyond the other sheet and is connected to the frame 3112 in the joining zone 3113.

FIG. 32 shows an exploded view of this embodiment with the galvanic cell 3201, its arresters 3203, 3204, partially

Packaging film 3206, the frame 3202 and the structures preferably provided on the frame 3205, which should support a proper use of the arresters 3203, 3204.

FIG. 33 a shows an oblique representation of this exemplary embodiment, in which the joining surface to the frame is hatched. 33b shows an enlarged detail of the lower corner of the galvanic cell 3301 shown in FIG. 33A, the arresters 3303, 3304, the packaging film 3302 and the protruding edges of the packaging film 3305, which is shown hatched in its joining zone 3306, 3307.

Claims

Patent claims

1. Frame for a galvanic cell, which consists essentially of a

Electrode stack consists of a foil-like packaging, are led out of the at least two arresters, characterized in that the frame is designed so that it with the packaging of the

Cell can be firmly connected in the production of the cell.

2. Frame according to claim 1, which is designed so that it with the

Packaging of the cell in the manufacture of the cell can be connected cohesively.

3. Frame according to claim 2, which is designed so that it with the

Packaging of the cell in the production of the cell - without the addition of additional substances - can be materially connected by a heat sealing process.

A frame according to any one of the preceding claims, having structures which assist flush alignment of cells provided with this frame in building a cell block.

A frame according to any one of the preceding claims, having structures which assist in laterally offset alignment of cells provided with this frame in the construction of a cell block.

6. Frame according to one of the preceding claims with openings for the implementation of Zugankem when building a cell block.

7. Galvanische cell with a frame according to one of claims 1 to 6.

8. Galvanic cell according to claim 7, wherein the packaging is connected on its inside to the frame.

9. Galvanische cell according to claim 7, in their packaging at their

Outside is connected to the frame.

10. A method for producing a galvanic cell, wherein a

Electrode stack in a foil-like packaging from which at least two arresters are led out is included, characterized in that when closing the packaging, a frame is firmly connected to the packaging.

11. The method of claim 10, wherein the frame is materially connected to the packaging.

12. The method of claim 10, wherein the frame with the packaging of the cell in the manufacture of the cell - without the addition of additional substances - is connected by a heat sealing material fit.

13. The method according to any one of the preceding Verfahrensansprüche, wherein the frame and the packaging of the cell are superimposed and pressed together by heatable stamp.

14. The method of claim 12, wherein the subsequent cooling is accelerated by an actively cooled sealing bar.

15. The method according to any one of the preceding method claims, wherein the closing of the packaging and the joining of the

Packaging with the frame done in one step.

16. A method for constructing a block of a plurality of

Galvanic cells with a frame according to claim 4, wherein the cells are aligned by means of structures of the frame flush.

17. A method for building a block of a plurality of

Galvanic cells with a frame according to claim 5, wherein the cells are aligned laterally offset by means of structures of the frame.

18. A method of constructing a block of a plurality of

Galvanic cells with a frame according to claim 6, wherein the

Block is stabilized by means of tie rods, which are passed through openings in the frame of the cells.

19. A method of constructing a block of a plurality of

Galvanic cells having the features of claims 16 and 18.