Battery comprising insulating connecting strip

Abstract

The invention relates to an electrochemical cell comprising a first electrode, a second electrode, a first connection conductor, a second connection conductor, a cell package, the first electrode and the second electrode being arranged inside the cell package and being insulated by the cell package from a surrounding region, preferably in a fluid-tight manner, the first connection conductor and the second connection conductor protrude from the battery cell package. According to the invention, a first connection conductor and a second connection conductor are provided, each of which is insulated from the surrounding region at least in sections by means of an insulator insulation, preferably in a fluid-tight manner, the insulated regions of the first and second connection conductors protruding from the cell package, and the corresponding terminal sections of the first connection conductor and the second connection conductor are not covered by the insulator.

Description

Technical Field

[0001] The present invention relates to electrochemical cells, assemblies and medical devices. Background Art

[0002] In an effort to create very small, compact and low-cost wearable devices or implantable systems, airtight housings have recently been omitted. In order to protect the electronic systems of wearable or implantable systems from moisture, the electronic systems are encapsulated or embedded in plastic materials. Advantageously, so-called pouch-shaped battery cells can be used as energy sources for these applications, wherein the components (electrodes, current collectors, electrolytes, spacers, etc.) of the electrochemical battery cells are enclosed by bags rather than traditional battery housings. Such bags are usually formed by multilayer laminates, wherein various layers (e.g., made of aluminum, nylon, and propylene) are bonded to each other. Due to the temperature sensitivity of some batteries, the material selection for encapsulating batteries is limited, because most materials for encapsulation or embedding require relatively high temperatures (>80°C). However, this high temperature cannot be used for most batteries (primary or secondary batteries).

[0003] Typical batteries, such as the aforementioned pouch cells, often utilize non-insulated connecting strips or current collectors, such as in the form of wires or metal tabs or straps. However, the area between the encapsulated electronic system and the housing of the battery is not protected from environmental influences.

[0004] To protect this area, an external housing may be used for the electronic system or the wearable or implanted system instead of encapsulation. This would have the disadvantages of a less compact design and higher manufacturing costs.

[0005] As an alternative, materials that allow encapsulation at lower temperatures can be used. However, some of these materials, such as epoxies, cure only very slowly at low temperatures. This limits the throughput during production. Other materials use photoinitiators. However, due to the complex geometries, uniform exposure is critical. In addition, many materials inherently contain ionic components, which can lead to the formation of dendrites, which can cause short circuits. Summary of the invention

[0006] Against this background, it is an object of the present invention to provide a battery design which enables a safe connection of the battery to an electronic system and a reliable and simple packaging of the electronic system, which also provides optimal protection against environmental conditions, in particular moisture.

[0007] This object is achieved by an electrochemical cell having the features of claim 1, by an assembly having the features of claim 11 and by an apparatus having the features of claim 15. Advantageous embodiments thereof are described in the respective dependent claims and in the following description.

[0008] According to claim 1, an electrochemical cell is provided. The electrochemical cell according to the present invention comprises:

[0009] a first electrode having a first polarity, the first electrode comprising a first current collector and a first electrode body comprising a first electrode material, and the first electrode body being conductively connected to the first current collector;

[0010] a second electrode having a second polarity, the second electrode comprising a second current collector and a second electrode body comprising a second electrode material, and the second electrode body being conductively connected to the second current collector;

[0011] - a first connecting conductor, which is electrically conductively connected to the first current collector;

[0012] - a second connecting conductor, which is electrically conductively connected to the second current collector; and

[0013] A cell packaging, within which the first electrode and the second electrode are arranged and insulated from the surrounding area by means of the cell packaging, preferably in a fluid-tight manner, and from which the first connecting conductor and the second connecting conductor protrude.

[0014] According to the present invention, it is particularly provided that the first connecting conductor and the second connecting conductor are each at least partially insulated relative to the surrounding area by an insulator, preferably insulated in a fluid-tight manner, wherein the insulating areas of the first connecting conductor and the second connecting conductor protrude from the battery cell package and the corresponding terminal sections of the first connecting conductor and the second connecting conductor are not covered by the insulator.

[0015] The invention is based in particular on the idea of ​​localizing the packaging process of an electronic system, for example for a wearable or implantable system, and configuring the connecting conductors of an electrochemical cell so that the thermal packaging of the electronic system can be carried out remotely from the temperature-sensitive components of the cell, for example by means of connecting conductors of suitable length. At the same time, the connecting conductors are at least partially protected from environmental influences and in particular from liquids by means of the insulation according to the invention.

[0016] The electrochemical cell according to the invention can be configured both as a primary battery and as a secondary battery.The design of the electrochemical cell according to the invention also allows the use of all known combinations of anode materials with corresponding cathode materials.

[0017] According to an embodiment of the electrochemical cell according to the invention, the insulation of the first connecting conductor and / or the second connecting conductor comprises or consists essentially of a plastic material. According to one embodiment, this plastic material is a thermoplastic material and preferably a liquid crystal polymer.

[0018] Within the meaning of the present invention, the term "liquid crystal polymer" (or LCP) is used in the sense known and customary to the person skilled in the art. "Liquid crystal polymer" refers in particular to aromatic polymers which have highly ordered or crystalline domains in the molten state or in solution. Non-limiting examples include aromatic polyamides, such as aromatic polyamide (Kevlar) and aromatic polyesters of hydroxybenzoic acid, such as the polycondensate of 4-hydroxybenzoic acid and 6-hydroxynaphthalene-2-carboxylic acid (Vectran).

[0019] According to a further embodiment of the electrochemical cell according to the invention, the cell packaging is designed in the form of a bag, which is particularly designed to be fluid-tight. The bag can be formed by a multilayer laminate, which includes a plurality of layers made of a thermoplastic material (such as polypropylene, polyamide and / or liquid crystal polymer) and / or one or more metal foils (for example made of aluminum), which can advantageously be integrally joined to each other, in particular by adhesive bonding. Instead of a metal foil, a metallized plastic film can also be used. As an alternative, the bag can be made essentially of one material, in particular a thermoplastic material, and preferably of a liquid crystal polymer.

[0020] According to a further embodiment of the electrochemical cell of the invention, the cell enclosure comprises or consists essentially of a plastic material. According to one embodiment, this plastic material is a thermoplastic material, and preferably a liquid crystal polymer.

[0021] According to a further embodiment of the electrochemical cell according to the invention, the insulator of the cell package and the first and second connecting conductors comprises a liquid crystal polymer or consists essentially of a liquid crystal polymer. Different liquid crystal polymers can be used for the cell package and the insulator of the first and second connecting conductors. However, advantageously, at least similar liquid crystal polymers are used for the insulator and the cell package, i.e. having similar properties, such as melting temperature. Preferably, the same liquid crystal polymer is used for the insulator and the cell package. Liquid crystal polymers have the advantage, in particular, of very low permeability to water and gases. Since liquid crystal polymers are thermoplastic materials, the interface may melt during the heat treatment and the interface effect is significantly reduced.

[0022] According to a further embodiment of the electrochemical cell according to the invention, the first current collector is formed by a metallization on an insulating plastic material, in particular a thermoplastic material, and preferably a liquid crystal polymer.

[0023] According to a further embodiment of the electrochemical cell according to the invention, the second current collector is formed by a metallization on an insulating plastic material, in particular a thermoplastic material, and preferably a liquid crystal polymer.

[0024] According to a further embodiment of the electrochemical cell according to the invention, the first current collector and the second current collector are each formed by a metallization on an insulating plastic material, in particular a thermoplastic material, and preferably a liquid crystal polymer.

[0025] According to a further embodiment of the electrochemical cell according to the invention, the first current collector and the first connecting conductor are formed by a first conductor track of a first printed circuit board, wherein the first printed circuit board comprises an electrically insulating substrate and the insulation of the first connecting conductor is at least partially formed by the substrate of the first printed circuit board. According to one embodiment, the electrically insulating substrate of the first printed circuit board comprises or consists essentially of a thermoplastic material, and preferably a liquid crystal polymer.

[0026] According to a further embodiment of the electrochemical cell according to the invention, the second current collector and the second connecting conductor are formed by second conductor tracks of the first printed circuit board, wherein the first conductor tracks and the second conductor tracks are electrically insulated from one another and the insulation of the second connecting conductor is at least partially formed by the first substrate of the first printed circuit board.

[0027] According to an alternative embodiment of the electrochemical cell according to the invention, the first current collector and the first connecting conductor are formed by first conductor tracks of a first printed circuit board, wherein the first printed circuit board comprises an electrically insulating substrate and the insulation of the first connecting conductor is at least partially formed by the substrate of the first printed circuit board, and the second current collector and the second connecting conductor are formed by conductor tracks of a second printed circuit board, wherein the second printed circuit board comprises an electrically insulating substrate and the insulation of the second connecting conductor is at least partially formed by the substrate of the second printed circuit board. According to one embodiment, the electrically insulating substrate of the second printed circuit board comprises or consists essentially of a thermoplastic material, and preferably a liquid crystal polymer. The electrically insulating substrate of the first printed circuit board and the electrically insulating substrate of the second printed circuit board preferably comprise the same liquid crystal polymer.

[0028] According to further embodiments of the electrochemical cell according to the invention, the cell packaging is in particular at least partially, and preferably substantially completely, formed by the substrate of the first printed circuit board. According to one embodiment, the substrate of the first printed circuit board comprises a first section and a second section, wherein the first section at least partially surrounds the first conductor track and the second section at least partially surrounds the second conductor track, and the first section and the second section are integrally joined or firmly bonded to one another, in particular melted or welded together, preferably in a fluid-tight manner. In this way, advantageously, both the cell packaging and the insulation of the first and second connecting conductors are formed by the substrate of the first printed circuit board.

[0029] For this purpose, for example, initially a first printed circuit board comprising first and second conductor tracks can be provided, the first conductor tracks can be partially coated with a first electrode active material, and the second conductor tracks can be partially coated with a second electrode active material, thereby forming the first and second electrodes. For packaging, the first printed circuit board or the substrate of the first printed circuit board can then be folded around an axis so that the first electrode and the second electrode are essentially opposite each other and the first connecting conductor and the second connecting conductor are offset from each other, wherein thereafter the first printed circuit board is integrally joined or firmly bonded to itself at the edge, in particular melted or welded together, so as to achieve a particularly fluid-tight package. In particular, the package can be designed in the form of a bag. Thereafter, the corresponding parts of the first and second conductor tracks, each forming the first and second connecting conductors, can be removed from the material of the substrate, for example by laser, so as to expose a part of the first and second connecting conductors to the surrounding area. Of course, the electrochemical cell according to the invention is sealed or packaged by the first printed circuit board only when all necessary components including at least one electrolyte and at least one separator are arranged in the cell, or the electrochemical cell is initially only partially packaged so as to at least allow the addition of electrolyte.

[0030] According to an alternative embodiment of the electrochemical cell according to the invention, the cell package is in particular at least partially, and preferably substantially completely, formed by a substrate of a first printed circuit board and by a substrate of a second printed circuit board. According to one embodiment, the substrate of the first printed circuit board comprises a section surrounding the conductor tracks of the first printed circuit board, and the substrate of the second printed circuit board comprises a section surrounding the conductor tracks of the second printed circuit board, wherein the aforementioned section of the first printed circuit board and the aforementioned section of the second printed circuit board are joined or firmly bonded to one another, in particular melted or welded together, preferably integrally in a fluid-tight manner. In this way, advantageously, the cell package and the insulation of the first and second connecting conductors are both formed by the substrate of the first printed circuit board and the substrate of the second printed circuit board.

[0031] For this purpose, for example, the first electrode active material can be partially applied to the conductor tracks of the first printed circuit board, and the second electrode active material can be partially applied to the conductor tracks of the second printed circuit board, thereby forming the first and second electrodes. Thereafter, the first printed circuit board and the second printed circuit board can be arranged relative to each other so that the first electrode and the second electrode are substantially opposite to each other and the first connecting conductor and the second connecting conductor are offset from each other, wherein the first printed circuit board and the second printed circuit board are then integrally joined or firmly bonded at the edge, in particular melted or welded together, so as to achieve a particularly fluid-tight package, wherein in particular the first printed circuit board and the second printed circuit board together can form a bag. Thereafter, the respective portions of the conductor tracks of the first printed circuit board and the second printed circuit board, each forming the first connecting conductor and the second connecting conductor, can be removed from the material of the substrate, for example by means of a laser, so as to expose a portion of the first connecting conductor and the second connecting conductor to the surrounding area. However, before encapsulation, initially all necessary components including at least one electrolyte and at least one spacer are arranged in the battery cell. Initially, it is also conceivable to at least allow a partial package to be added with electrolyte, as well as a final package after the addition of electrolyte.

[0032] According to another embodiment of the electrochemical cell according to the invention, the first electrode body of the first electrode comprises an alkali metal as electrode active material, preferably lithium, sodium or potassium, and the second electrode body of the second electrode comprises carbon monofluoride (CFx), manganese dioxide (MnO2), iodine (I2), silver vanadium oxide (SVO), copper silver vanadium oxide (CSVO), V2O2, TiS2, CuO2, Cu2S, FeS, FeS2, Ag2O, Ag2O2, CuF, Ag2CrO4, CuO, Cu2P2O7, Cu4P2O9, Cu5P2O 10 , Ag2Cu2P2O8, Ag2Cu3P2O9, copper vanadium oxide or a mixture thereof as the electrode active material. The second electrode body of the second electrode preferably comprises carbon monofluoride (CFx) or manganese dioxide (MnO2) as the electrode active material. In the above-mentioned embodiment, the electrochemical cell according to the present invention is particularly designed as a main cell.

[0033] According to a further embodiment of the electrochemical cell according to the invention, the first electrode body of the first electrode comprises an alkali metal as electrode active material, preferably lithium, sodium or potassium, and the second electrode body of the second electrode comprises lithium cobalt oxide (LiCoO2), lithium nickel manganese cobalt oxide (mixed oxide of LiCoO2, LiNiO2 and LiMnO2), lithium nickel cobalt aluminum oxide (NCA), lithium manganese oxide (LiMn2O4), lithium iron phosphate (LiFePO4) or carbon, in particular graphite or hard carbon (or non-graphitizable carbon) as electrode active material. In this embodiment, the electrochemical cell according to the invention is designed in particular as a secondary battery.

[0034] According to another embodiment, the electrochemical cell according to the present invention further comprises an electrolyte, preferably a non-aqueous electrolyte. Suitable electrolytes include, but are not limited to, non-aqueous, preferably aprotic solvents, in particular esters, ethers and dialkyl carbonates, in particular tetrahydrofuran, methyl acetate, diethylene glycol dimethyl ether (bis(2-methoxyethyl) ether), triethylene glycol dimethyl ether (tri(2-methoxyethyl) ether), tetraethylene glycol dimethyl ether (tetra(2-methoxyethyl) ether), 1,2-dimethoxyethane, 1,2-diethoxyethane, 1-ethoxy-2-methoxyethane, dimethyl carbonate, diethyl carbonate, dipropyl carbonate, ethyl methyl carbonate, methyl propyl carbonate, ethyl propyl carbonate or mixtures thereof, or cyclic carbonates, cyclic esters, cyclic amides, in particular propylene carbonate, ethylene carbonate, butylene carbonate, γ-butyrolactone, N-methylpyrrolidone or mixtures thereof. Suitable solvents also include polar non-aqueous solvents, such as acetonitrile, dimethyl sulfoxide, dimethylformamide, dimethylacetamide or mixtures thereof. The electrolyte may be present in liquid form or in gel form, for example by admixture with a gelling agent such as silicic acid.

[0035] According to another embodiment, the electrolyte is designed as a solid electrolyte, for example lithium iodide (LiI).

[0036] According to another embodiment, the electrolyte comprises at least one conductive salt. In one embodiment, wherein the first electrode body comprises an alkali metal as an electrode active material, the conductive salt is preferably an inorganic salt of an alkali metal of the first electrode (or anode). Suitable anions include, but are not limited to, PF6-, BF4-, AsF6-, SbF6-, ClO4-, O2-, AlCl4-, GaCl4-, SCN-, SO3(C6F5)-, C(SO2CF3)3-, N(SO2CF3)2- and SO3CF3. In one embodiment, the conductive salt is present in an amount of 0.5 to 2.0 mol*l -1 In the range of, and preferably 0.8 to 1.5, 2.0 mol * l -1 The concentration exists in the range of

[0037] According to another embodiment, the electrochemical cell according to the invention further comprises a spacer, which is arranged between the first electrode and the second electrode. Suitable spacers include, but are not limited to, non-metallic materials, in particular polymers, such as polyethylene or polypropylene, polyamides, such as nylon, or fluoropolymers, such as ethylene-tetrafluoroethylene (ETFE) copolymers or polytetrafluoroethylene (PTFE). The spacer is preferably designed in the form of a film and is advantageously wetted or saturated with a suitable electrolyte, in particular with an electrolyte according to the above-described embodiments, before assembling the electrochemical cell according to the invention.

[0038] According to claim 11, an assembly is provided. The assembly comprises an electrochemical cell according to claim 1 or one of the above embodiments thereof and an electronic module, wherein the electronic module comprises a module substrate, a module conductor structure, one or more electronic module components and a module package, wherein the one or more electronic module components are arranged on the module substrate and are conductively connected to the module conductor structure, and wherein the first connecting conductor and the second connecting conductor of the electrochemical cell are conductively connected to the module conductor structure, in particular bonded to the module conductor structure.

[0039] According to an embodiment of the assembly according to the invention, the module encapsulation is at least partially formed by a module substrate.

[0040] According to another embodiment of the component according to the invention, the module substrate comprises a section surrounding a module conductor structure and / or one or more electronic module components, wherein the electronic module further comprises a covering layer, which is arranged on one or more electronic module components and / or the module conductor structure, and the covering layer is integrally joined or firmly bonded, in particular melted or welded, to the aforementioned section of the module substrate, in particular in a fluid-tight manner, and wherein the module package is at least partially, and preferably substantially completely, formed by the module substrate and the covering layer.

[0041] According to another embodiment of the assembly according to the invention, the module substrate and / or the cover layer comprises or consists essentially of a thermoplastic polymer, preferably a liquid crystal polymer. The module substrate and the cover layer preferably comprise the same liquid crystal polymer.

[0042] According to a further embodiment of the assembly according to the invention, the module substrate and the first printed circuit board of the electrochemical cells are formed by a common or shared substrate.

[0043] According to claim 15, a device is provided, wherein the device comprises an electrochemical cell according to claim 1 or one of its embodiments, or an assembly according to claim 11 or one of its embodiments. According to one embodiment, the device is designed as a medical device, and preferably as an implantable medical device. According to an alternative embodiment, the device is designed as a wearable device or a wearable device. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Other features and advantages of the present invention are described below based on the description of the drawings of exemplary embodiments. In the drawings:

[0045] Figure 1 An electrochemical cell according to known prior art is shown;

[0046] Figure 2 An assembly comprising a known prior art electronic module and an electrochemical cell connected thereto is shown;

[0047] Figure 3 An embodiment of an electrochemical cell according to the invention is shown;

[0048] Figure 4 Shown include from Figure 3 An assembly of an embodiment of an electrochemical cell according to the invention;

[0049] Figure 5 An assembly comprising another embodiment of an electrochemical cell according to the present invention is shown;

[0050] Figure 6 shows an assembly including another embodiment of an electrochemical cell according to the present invention; and

[0051] Figure 7 Shown from Figure 6 Embodiments of the electrochemical cell according to the invention. DETAILED DESCRIPTION

[0052] Figure 1An electrochemical cell 100 is shown, such as a lithium-ion cell as is known in the prior art. The cell comprises an anode 110, comprising an anode body 112, comprising an anode material, such as lithium, which is applied to an anode collector or anode current collector 111. The electrochemical cell further comprises a cathode 120, comprising a cathode body 122, comprising a cathode material (e.g., CFx or MnO2), which is applied to a cathode collector or current collector 121. The two electrodes 110, 120 are separated from the surrounding area by a suitable housing, such as a welded composite film 130, which is designed as a bag. In order to contact other components (see below), the electrochemical cell 100 comprises corresponding connecting conductors 113, 123 for the two electrodes, which are conductively connected to the corresponding current collectors 111, 121 and which are guided out of the electrochemical cell through the housing or composite film 130. In the case of conventional batteries, the connecting conductors are usually designed as wires or metal tabs.

[0053] Figure 2 An assembly comprising the electrochemical cell 100 described above is shown, which is conductively connected to an electronic module 200. The module may include a printed circuit board comprising a substrate 230 and a conductor structure 210, and the module additionally includes one or more electronic components 220, which are arranged on the printed circuit board and conductively connected to the conductor structure 210. If the assembly is intended for a compact wearable device or an implantable device, the electronic module 200 is usually embedded in a plastic material (such as LCP) instead of being embedded in a housing as a protection against environmental influences (e.g. moisture). As described above, typical batteries, such as the electrochemical cell 100 described above, use non-insulated connecting conductors / collectors 113, 123. Therefore, the area U between the encapsulated electronic module 200 and the housing 130 of the electrochemical cell will not be protected. Therefore, unless the end area of ​​the wire is also encapsulated, there is no sealed connection from the battery housing to the electronic system because there is still an unprotected area U between the battery 100 and the electronic system 200.

[0054] To solve this problem, according to the invention, in particular, the electrochemical cells 300, 400 are provided with insulating 340, 440 connecting strips / conductors. Due to the localization of the packaging process, similar to the electronic module 200, these connecting strips / conductors 311, 321, 451, 452, 461 can be packaged without exposing the electrochemical cells 300, 400 to temperature.

[0055] Figure 3An embodiment of an electrochemical cell 300 according to the present invention is shown. In addition to typical components such as an anode 310, a cathode 320 (including an anode current collector 311 and a cathode current collector 321), the electrochemical cell 300 is particularly characterized by connecting conductors 313, 323 with an insulator 340. The insulating 340 connecting strips / conductors 313, 323 are connected to the cathode and anode current collectors or current collectors 311, 321 inside the electrochemical cell 300. When the electrochemical cell 300 is sealed, the connecting strips / conductors 311, 321 are led to the outside through the battery cell package 330. The connecting strips / conductors 313, 323 include a terminal section that is at least partially free of an insulator 340. This section is used to electrically contact other components.

[0056] The battery cell package 330 can be formed by a laminate or a composite film, which is designed in the form of a bag (package). The laminate or composite film may include multiple layers, in particular a metal layer or a metallized layer, for example made of or containing aluminum, with plastic layers or coatings on both sides, for example made of nylon, polypropylene and / or LCP. In order to seal the electrochemical battery cell 300 according to the present invention, the above-mentioned components of the battery cell (including the electrodes 310, 320 of the connected connecting conductors 313, 323) can be arranged on the first section of the above-mentioned composite film, wherein at least one spacer (not shown) is arranged between the electrodes 310, 320 so that there is no direct physical and / or electrical contact between the electrodes 310, 320. Thereafter, the second section of the composite film can be folded onto the first section along the folding edge, and the two edges of the first section and the second section perpendicular to the folding axis can be integrally joined or firmly bonded, for example, by adhesive bonding or welding. In this way, a bag opened to one side can be produced by the composite film, wherein the electrolyte can be added through the opening. In addition, the connecting conductors 313, 323 can be led out of the battery cell package 330 or the battery cell 300 via the opening. Thereafter, the opening can be closed. At least one spacer may have been saturated with electrolyte before being arranged between the electrodes 310, 320. As an alternative, the electrolyte may be present in the form of a gel and applied to the electrodes 310, 320 and / or the spacer before being arranged on the composite film.

[0057] Figure 4 The electronic module 200 (with Figure 2 The above-mentioned terminal sections of the connecting strips / conductors 313 , 323 contact the module conductor structure 210 of the electronic module 200 .

[0058] Figure 5An alternative embodiment is shown, according to which the current collector films or collectors 311 , 321 of the electrodes 310 , 320 are made of a conductive metallization on an insulating material 314 , 324 . Figure 5 In each case, a metallization 311 , 321 on a respective insulating material 314 , 324 is schematically shown, which together form a respective current collector.

[0059] If the insulator 340 of the connecting strips / conductors 311, 321 is made of LCP (e.g. Figure 3 and Figure 4 ), or if the collector film or collector is made of metallized / conductive LCP 311, 314, 321, 324 (as shown Figure 5 As shown), and if the electronic module 200 is also encapsulated with the thermoplastic, the connecting strips / conductors 311, 321 can be directly connected (e.g., welded) or directly encapsulated with the electronic module 200. Advantageously, such an encapsulation 230 does not have any interface, thereby significantly reducing the diffusion of liquids, for example.

[0060] As another example, an LCP substrate 450, 460 including partial metallization 451, 452, 461 may be used as insulating connecting strips 413, 423, pickup or conductor electrodes 411, 421 (substrate of the active mass of the electrode), and battery housing or cell enclosure 430.

[0061] Figure 6 Such an embodiment is shown in detail. The corresponding electrode or two electrodes 410, 420 are essentially formed by a printed circuit board, which includes an insulating substrate 450 made of LCP, for example, and one or more conductor tracks 451, 452. The electrode body 412, 422 is applied to a section of one of the conductor tracks 451, 452, which thereby forms the current collector 411, 421, wherein the other section of the conductor track 451, 452 that is not coated with the electrode body forms the connecting conductor 413, 423. The two electrodes 410, 420 (this is the anode and cathode) can be formed on a shared or common substrate 450 with two conductor tracks 451, 452. As an alternative, the electrode 410 can be formed on a substrate 450 with one conductor track 451, and the other electrode 420 can be formed on another substrate 460 with another conductor track 461. In both cases, the substrate 450, 460 of one or the other printed circuit board forms part of the insulator 440 of the connecting conductor.

[0062] Furthermore, one printed circuit board or two printed circuit boards can advantageously be used for the packaging 430 of the electrochemical cell 400. Figure 7Schematically shown in FIG. In one variant, the two electrodes 410, 420 are formed on a printed circuit board or substrate 450. Thereafter, the printed circuit board or substrate is folded along the edge F so that the electrodes 410, 420 are essentially aligned opposite each other and the sections of the two conductor tracks 451, 452 forming the connecting conductors 413, 423 are opposite each other in an offset manner, wherein, before or after the folding, at least one spacer is arranged between the electrodes 410, 420 so that there is no direct physical and / or electrical contact between the electrodes 410, 420. Thereafter, the substrate is welded to itself via the sections 453, 454 of the substrate extending around the electrodes, and thus the encapsulation 430 of the electrochemical cell 400 is achieved.

[0063] In an alternative variant, as described above, the electrode 410 is formed on a printed circuit board or substrate 450 and the other electrode 420 is formed on another printed circuit board or substrate 460. For packaging, the two printed circuit boards or substrates 450, 460 are arranged so that the electrodes 410, 420 are substantially aligned opposite each other and the sections of the conductor tracks 451, 461 forming the connecting conductors 413, 423 are offset from each other, wherein here too, before packaging, at least one spacer is arranged between the electrodes 410, 420 so that there is no direct physical and / or electrical contact between the electrodes 410, 420. Thereafter, the two substrates 450, 460 are welded together via substrate sections 453, 463, which extend circumferentially around the respective electrodes 410, 420.

[0064] In both of the above-mentioned variants, electrolyte can be additionally added to the electrochemical cell 400 before encapsulation. As an alternative, encapsulation 430 can initially be performed only partially in order to form an opening for adding electrolyte. The opening can then be completely closed after the electrolyte is added.

[0065] In an embodiment according to the invention, a connection between the battery and the electronic system can thus be achieved which has excellent electrical properties (low connection resistance, very high insulation) and very low diffusion (LCP can be welded together without an interface, the diffusion along the interface is 100 to 1000 times faster). At the same time, a temperature load on the battery can be avoided.

Claims

1. An electrochemical cell (300, 400), include: a first electrode (310, 410) having a first polarity, the first electrode (310, 410) comprising a first current collector (311, 411, 451) and a first electrode body (312, 412) comprising a first electrode material, and the first electrode body (312, 412) being conductively connected to the first current collector (311, 411, 451); a second electrode (320, 420) having a second polarity, the second electrode (320, 420) comprising a second current collector (321, 421, 452, 461) and a second electrode body (322, 422) comprising a second electrode material, and the second electrode body (322, 422) being conductively connected to the second current collector (321, 421, 452, 461); - a first connecting conductor (313, 451) which is electrically conductively connected to the first current collector (311, 411, 451); - a second connecting conductor (323, 452, 461) which is electrically conductively connected to the second current collector (321, 421, 452, 461); and a battery cell package (330, 430), the first electrode (310, 410) and the second electrode (320, 420) being arranged inside the battery cell package (330, 430) and being insulated from the surrounding area by the battery cell package (330, 430), preferably insulated in a fluid-tight manner, and the first connecting conductor (313, 451) and the second connecting conductor (323, 452, 461) protruding from the battery cell package (330, 430), It is characterized in that The first connecting conductor (313, 451) and the second connecting conductor (323, 452, 461) are each at least partially insulated from the surrounding area by an insulator (340, 440, 450, 460), preferably insulated in a fluid-tight manner, the insulating areas of the first connecting conductor (313, 451) and the second connecting conductor (323, 452, 461) protruding from the battery cell package (330, 430), and the corresponding terminal sections of the first connecting conductor (313, 451) and the second connecting conductor (323, 452, 461) are not covered by the insulator.

2. The electrochemical cell (300, 400) according to claim 1, Features: The insulator (440, 450, 460) of the first connecting conductor (313, 451) and / or the second connecting conductor (323, 452, 461) comprises a plastic material, in particular a thermoplastic material, and preferably a liquid crystal polymer, or essentially consists of a plastic material, in particular a thermoplastic material, and preferably a liquid crystal polymer, and / or The battery cell encapsulation (330, 430) comprises or essentially consists of a plastic material, in particular a thermoplastic material, and preferably a liquid crystal polymer.

3. The electrochemical cell (300) according to claim 1 or 2, It is characterized in that - the first current collector (311) is formed by a metallization on an insulating plastic material (314), in particular a thermoplastic material, and preferably a liquid crystal polymer; and / or - said second current collector (321) is formed by a metallization on an insulating plastic material (324), in particular a thermoplastic material, and preferably a liquid crystal polymer.

4. The electrochemical cell (400) according to any one of the preceding claims, It is characterized in that The first current collector (411) and the first connecting conductor (413) are formed by a first conductor track (451) of a first printed circuit board, the first printed circuit board comprising an electrically insulating substrate (450), and the insulator (440) of the first connecting conductor (451) is at least partially formed by the substrate (450) of the first printed circuit board.

5. The electrochemical cell (400) according to claim 4, It is characterized in that The second current collector (421) and the second connecting conductor (423) are formed by a second conductor track (452) of the first printed circuit board, the first conductor track (451) and the second conductor track (452) are electrically insulated from each other, and the insulator (440, 450) of the second connecting conductor (413, 452) is at least partially formed by a substrate (450) of the first printed circuit board; or The second current collector (421) and the second connecting conductor (423) are formed by conductor tracks (461) of a second printed circuit board, the second printed circuit board comprises an electrically insulating substrate (460), and the insulator (440, 460) of the second connecting conductor is at least partially formed by the substrate (460) of the second printed circuit board.

6. The electrochemical cell (400) according to claim 4 or 5, It is characterized in that The substrate (450) of the first printed circuit board comprises or consists essentially of a thermoplastic material, and preferably a liquid crystal polymer; and / or The substrate (460) of the second printed circuit board comprises or consists essentially of a thermoplastic material, and preferably a liquid crystal polymer.

7. The electrochemical cell (400) according to any one of claims 4 to 6, It is characterized in that The battery cell package (430) is formed by the substrate (450) of the first printed circuit board and / or by the substrate (460) of the second printed circuit board.

8. The electrochemical cell (400) according to claim 7, It is characterized in that - the substrate (450) of the first printed circuit board comprises a first section (453) and a second section (454), the first section (453) at least partially surrounding the first conductor track (451) and the second section (454) at least partially surrounding the second conductor track (452), and the first section (453) and the second section (454) are integrally joined to one another, in particular melted or welded together, preferably in a fluid-tight manner; or - the substrate (450) of the first printed circuit board comprises a section (453) surrounding a first conductor track (451) of the first printed circuit board, and the substrate (460) of the second printed circuit board (463) comprises a section surrounding a conductor track (461) of the second printed circuit board, the aforementioned section (453) of the first printed circuit board and the aforementioned section (463) of the second printed circuit board being integrally joined to one another, in particular melted or welded together, preferably in a fluid-tight manner.

9. The electrochemical cell (300, 400) according to any one of the preceding claims, It is characterized in that The first electrode body (312, 412) of the first electrode (310, 410) comprises an alkali metal as an electrode active material, preferably lithium, sodium or potassium.

10. The electrochemical cell (300, 400) according to any one of the preceding claims, further comprising: include: an electrolyte, preferably a non-aqueous electrolyte; and / or A spacer is disposed between the first electrode and the second electrode.

11. A component, include: An electrochemical cell (300, 400) according to any one of the preceding claims; and An electronic module (200) comprising a module substrate (230), a module conductor structure (210), one or more electronic module components (220) and a module package (240), wherein the one or more electronic module components (220) are arranged on the module substrate (230) and are electrically conductively connected to the module conductor structure (210), The first connecting conductor (313, 413, 451) and the second connecting conductor (323, 423, 452, 461) of the electrochemical cell (300, 400) are electrically conductively connected, in particular joined, to the module conductor structure (210).

12. The assembly according to claim 11, It is characterized in that The module package (240) is at least partially formed by the module substrate (230).

13. The assembly according to claim 12, It is characterized in that The module substrate (230) includes a section surrounding the module conductor structure (210) and / or the one or more electronic module components (220), and the electronic module also includes a covering layer arranged on the one or more electronic module components (220) and / or the module conductor structure (210), and the covering layer is integrally joined to the aforementioned section of the module substrate (230), in particular melted or welded to the aforementioned section of the module substrate (230), in particular in a fluid-tight manner, and the module package (240) is at least partially formed by the module substrate (230) and the covering layer.

14. An assembly according to any one of claims 11 to 13, It is characterized in that The module substrate (230) and / or the cover layer comprises or consists essentially of a thermoplastic polymer, and preferably a liquid crystal polymer.

15. A device, in particular a medical device or an implantable medical device or a portable device, comprising an electrochemical cell (300, 400) according to any one of claims 1 to 10 or an assembly according to any one of claims 11 to 14.

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