Electrochemical cell, electrochemical system and method for producing an electrochemical cell

Description

[0001] The present invention relates to an electrochemical cell for an electrochemical system.

[0002] Furthermore, the present invention relates to an electrochemical system comprising one or more electrochemical cells.

[0003] The present invention further relates to a method for manufacturing an electrochemical cell.

[0004] Electrochemical cells are known from DE 10 2018 209 270 A1, DE 10 2017 200 390 A1, EP 2 541 650 A1, US 2015 / 0214516 A1, DE 10 2012 213 871 A1, EP 1 459 882 A1, US 2018 / 0097208 A1 and WO 2017 / 159760 A1.

[0005] The present invention is based on the objective of providing an electrochemical cell which is as easy to manufacture as possible and has a long service life.

[0006] This problem is solved by an electrochemical cell according to claim 1.

[0007] The electrochemical cell for an electrochemical system comprises an electrochemical element for absorbing, storing and / or providing electrical energy.

[0008] The electrochemical cell further comprises a housing for receiving the electrochemical element, the housing surrounding an interior of the electrochemical cell and including a cover element.

[0009] The cover element is preferably connected to another, in particular cup-shaped, housing component by means of a form-fit and / or force-fit and / or material-fit connection.

[0010] The electrochemical cell comprises a first cell terminal and a second cell terminal for connecting the electrochemical cell to a cell contacting system.

[0011] The first cell terminal, for example, is an anode.

[0012] The second cell terminal is, for example, a cathode.

[0013] Alternatively, it can be provided that the first cell terminal forms the cathode and / or that the second cell terminal forms the anode.

[0014] It can be advantageous if the electrochemical cell includes a first contact element that connects the first cell terminal to a first connecting conductor of the electrochemical cell, and if the electrochemical cell includes a second contact element that connects the second cell terminal to a second connecting conductor of the electrochemical cell.

[0015] The first connecting conductor preferably serves as an electrical connection between the electrochemical element and the first contact element.

[0016] The second connecting conductor serves in particular to provide an electrical connection between the electrochemical element and the second contact element.

[0017] The first contact element is fixed to the cover element in a first connection area by means of a first potting element.

[0018] The first potting element is formed from a first polymer material, which in particular comprises or is formed from a first resin material.

[0019] Additionally or alternatively, the second contact element is fixed to the cover element in a second connection area by means of a second potting element.

[0020] The second potting element is formed from a second polymer material, which in particular comprises or is formed from a second resin material.

[0021] By fixing the first contact element using the first potting element and / or the second contact element using the second potting element, a simplified manufacturing process for the electrochemical cell is preferably made possible.

[0022] Additional tools for manufacturing the first and / or second potting element are preferably unnecessary. In particular, a tool-free terminal feedthrough is provided.

[0023] The use of the first resin material and / or the second resin material can, in particular, prevent or reduce gap formation, which can occur, for example, when injection molding a thermoplastic material. This preferably optimizes the sealing effect of the first potting element and / or the second potting element.

[0024] It can be advantageous if the first potting element and / or the second potting element are filling potting elements.

[0025] As an alternative to fixing the second contact element by means of the second potting element, the second cell terminal can also be directly bonded to the cover element, for example by laser welding and / or friction welding and / or ultrasonic welding.

[0026] The first contact element may have a cross-section that is at least approximately T-shaped or L-shaped. The cross-section is preferably parallel to a main face of the electrochemical cell.

[0027] Preferably, the second contact element has a cross-section that is at least approximately T-shaped or at least approximately L-shaped. The cross-section is preferably parallel to a main face of the electrochemical cell.

[0028] It can be advantageous if the first potting element, in a cross-section parallel to a main face of the electrochemical cell, has an anchor shape and / or at least approximately two C-shapes. This preferably creates a positive fit and / or frictional fit between the cover element and the first potting element, particularly along a direction parallel to a central axis of the first contact element.

[0029] The central axis of the first contact element is preferably a principal extension direction of the first contact element. In particular, the central axis of the first contact element is arranged at least approximately perpendicular to a principal extension plane of the cover element.

[0030] It can be advantageous if the second potting element, in a cross-section parallel to a main face of the electrochemical cell, has an anchor shape and / or at least approximately two C-shapes. This preferably creates a positive fit and / or frictional connection between the cover element and the second potting element, particularly along a direction parallel to a central axis of the second contact element.

[0031] The central axis of the second contact element is preferably a principal extension direction of the second contact element. In particular, the central axis of the second contact element is arranged at least approximately perpendicular to a principal extension plane of the cover element.

[0032] It can be advantageous if the electrochemical cell has at least one predetermined breaking point, which is located, for example, in a central section of the cover element between the first cell terminal and the second cell terminal. This predetermined breaking point is, in particular, at least one material weak point, for example, at least one rupture element.

[0033] If a critical temperature and / or critical pressure is exceeded in the interior of the electrochemical cell, at least one predetermined breaking point preferably breaks and / or tears.

[0034] It can be advantageous if the cover element is made of or comprises a metallic material. This can facilitate processing.

[0035] For example, the cover element is made from a sheet of metal, such as aluminum.

[0036] It can be advantageous if the first polymer material has a hardness of approximately 40 Shore D or more, in particular approximately 50 Shore D or more, for example approximately 60 Shore D or more.

[0037] Preferably, the first polymer material has a hardness of approximately 100 Shore D or less, in particular approximately 97 Shore D or less, for example approximately 95 Shore D or less.

[0038] In particular, the second polymer material has a hardness of approximately 40 Shore D or more, especially approximately 50 Shore D or more, for example approximately 60 Shore D or more.

[0039] It can be advantageous if the second polymer material has a hardness of approximately 100 Shore D or less, especially approximately 97 Shore D or less, for example approximately 95 Shore D or less.

[0040] The hardness is determined in particular according to DIN EN ISO 868.

[0041] The stated hardness values ​​preferably also apply to the first resin material and / or the second resin material in a cured state.

[0042] It can be advantageous if the first polymer material has a glass transition temperature of approximately 90°C or more, in particular approximately 95°C or more, for example approximately 100°C or more.

[0043] It can be advantageous if the second polymer material has a glass transition temperature of approximately 90°C or more, especially approximately 95°C or more, for example approximately 100°C or more.

[0044] The stated values ​​for the glass transition temperature preferably also apply to the first resin material and / or the second resin material in a cured state.

[0045] Preferably, the first resin material and / or the second resin material comprises or is formed from one or more of the following materials: epoxy resin material, phenolic resin material, aminoplast material, polyurethane material, silicone material, polyester resin material, ABS (acrylonitrile butadiene styrene) resin material.

[0046] An epoxy resin material, for example, an epoxy resin, has proven particularly advantageous for use as a first and / or second resin material. It exhibits optimized corrosion resistance. This can be especially beneficial with regard to contact with an electrolyte used inside the electrochemical cell.

[0047] In particular, epoxy resin materials exhibit optimized gas tightness, which is why sealing with epoxy resin materials is advantageous for optimized tightness.

[0048] When using an epoxy resin material as the first and / or second resin material, minimal volume shrinkage preferably occurs during curing and / or drying. This can reduce or prevent cracking in the first and / or second casting element.

[0049] Preferably, one-component resin materials are used as the first resin material and / or second resin material.

[0050] It can be advantageous if the first polymer material and / or the second polymer material are highly cross-linked materials, for example highly cross-linked epoxy resin materials.

[0051] It can be advantageous if the first resin material and / or the second resin material have a viscosity of approximately 10² < mPa·s or more, in particular approximately 10³ < mPa·s or more, when manufacturing the first potting element and / or the second potting element.

[0052] The viscosity of the first resin material and / or the second resin material in the manufacture of the electrochemical cell is preferably approximately 10⁶ < mPa·s or less, in particular 10⁵ < mPa·s or less.

[0053] Filling of the first connection area with the first resin material and / or the second connection area with the second resin material preferably takes place at ambient pressure.

[0054] In particular, to prevent oxygen and / or water diffusion into the interior of the electrochemical cell, it may be advantageous if the first resin material and / or the second resin material include one or more fillers.

[0055] One or more fillers can also minimize diffusion of the electrolyte out of the interior of the electrochemical cell.

[0056] The one or more fillers are selected in particular from one or more of the following: inorganic fillers, in particular silicon oxide, carbonate, carbide, in particular silicon carbide, nitride, in particular metal nitride, metal oxide.

[0057] It can be advantageous if the cover element is connected on its inner side, facing the interior, to an insulating element, particularly a plate-shaped one. The insulating element has one or more positioning projections, especially on a side facing the cover element.

[0058] The one or more positioning projections preferably engage in one or more complementary positioning recesses of the cover element.

[0059] Additionally or alternatively, the insulating element may be provided with one or more positioning recesses. These one or more positioning recesses of the insulating element engage, in particular, with one or more positioning projections of the cover element.

[0060] In particular, a positive fit and / or force fit between the cover element and the insulating element is preferably formed by one or more positioning projections and / or one or more positioning recesses.

[0061] The one or more positioning projections and / or positioning recesses preferably block a displacement of the cover element relative to the insulating element in a direction which is arranged parallel to a principal extension plane of the cover element.

[0062] In particular, the one or more positioning projections of the insulating element engage behind the cover element in a direction arranged parallel to a main extension plane of the cover element.

[0063] In particular, the one or more positioning projections of the cover element engage behind the insulating element in a direction arranged parallel to a main extension plane of the insulating element.

[0064] It may be provided that one or more positioning protrusions are designed in a pin-like form, for example as positioning pins.

[0065] In addition to or as an alternative to pin-shaped positioning projections, one or more positioning projections may have an oval, rectangular, or linear cross-section. The cross-section is preferably parallel to the main plane of extension of the cover element.

[0066] It can be advantageous if the average thickness of the insulating element of the electrochemical cell is approximately 1 / 10 or less, for example approximately 1 / 15 or less, of the average width of the insulating element taken perpendicular to the thickness. For example, the average thickness of the insulating element is preferably approximately 1.7 mm or less.

[0067] The thickness of the insulating element is preferably defined perpendicular to a principal extension plane of the insulating element.

[0068] For the purposes of this description and the attached claims, "thickness" preferably refers to a material thickness, in particular an average material thickness, of the corresponding element (excluding recesses and / or passage openings).

[0069] The insulating element is preferably an injection-molded element and / or a potting element.

[0070] It may be intended that the insulating element is manufactured in multiple parts, for example in two parts.

[0071] It can be advantageous if the insulating element has several, especially regularly arranged, openings. For example, several openings are arranged in all parts of the insulating element. The openings are preferably at least approximately oval or at least approximately rectangular.

[0072] The openings can be designed in the form of recesses.

[0073] In particular, the insulating element includes a compensating element for absorbing mechanical stresses.

[0074] It can be advantageous if the insulating element includes a fifth polymer material or is made from a fifth polymer material.

[0075] The fifth polymer material is preferably a thermoplastic polymer material, in particular an electrolyte-resistant thermoplastic polymer material.

[0076] Additionally or alternatively, the fifth polymer material is in particular a polymer material that can be processed in an injection molding process.

[0077] For example, the fifth polymer material comprises or is formed from one or more of the following materials: polyethylene terephthalate, polyethylene, polypropylene, polybutylene terephthalate.

[0078] It may be provided that the cover element has a first recessed area on a side facing away from the interior for receiving the first potting element.

[0079] Additionally or alternatively, it may be provided that the cover element has a second recessed area on a side facing away from the interior to accommodate the second potting element.

[0080] The first recessed area and / or the second recessed area are, for example, casting basins.

[0081] Preferably, the first recessed area and / or the second recessed area are formed by embossing. For example, the first recessed area and / or the second recessed area are debossed areas.

[0082] It can be advantageous if the first recessed area has a bulge, which preferably forms a degassing opening during the filling process of the first resin material.

[0083] In particular, the second recessed area has a bulge. This bulge preferably forms a degassing opening during the filling process of the second resin material.

[0084] By forming a first recessed area and / or a second recessed area, (further and / or separate) sealing elements in the respective connection area are preferably unnecessary.

[0085] It can be advantageous if the electrochemical cell includes a first sealing element which radially surrounds the first potting element on an outer side of the cover element facing away from the interior of the electrochemical cell with respect to a central axis of the first contact element.

[0086] The first sealing element, for example, is closed in a ring shape.

[0087] "Closed in an annular shape" is preferably not limited to elements which have a circular shape in a cross-section, but also refers to elements with an oval cross-section or a rectangular cross-section whose basic body has no free ends.

[0088] Alternatively, it can be provided that the first sealing element has at least one interruption.

[0089] It can be advantageous if the first sealing element has at least one interruption in the radial direction with respect to the central axis of the first contact element.

[0090] The at least one interruption of the first sealing element preferably forms at least one vent opening through which air can escape when the first resin material is poured into the first connection area.

[0091] Regardless of the shape of the first sealing element, the first sealing element preferably surrounds approximately 350° to approximately 355° of a circle in a cross-section, the center of which forms the central axis of the first contact element.

[0092] The cross-section in an installation situation of the first sealing element is preferably taken parallel to a main extension plane of the cover element.

[0093] Additionally or alternatively, it may be provided that the first sealing element projects beyond the first cell terminal in a radial direction with respect to the central axis of the first contact element.

[0094] For example, a vent opening is formed by a protrusion of the first sealing element, particularly in the radial direction with respect to the central axis of the first contact element, over the first cell terminal.

[0095] The central axis of the first contact element is preferably a central axis of the first cell terminal.

[0096] Additionally or alternatively, the electrochemical cell includes in particular a second sealing element which radially surrounds the second potting element on an outer surface of the cover element facing away from the interior of the electrochemical cell with respect to a central axis of the second contact element.

[0097] The second sealing element, for example, is closed in a ring shape.

[0098] Alternatively, it can be provided that the second sealing element has at least one interruption.

[0099] It can be advantageous if the second sealing element has at least one interruption in the radial direction with respect to the central axis of the second contact element.

[0100] The at least one interruption of the second sealing element preferably forms at least one vent opening through which air can escape when the second resin material is poured into the second connection area.

[0101] Regardless of the shape of the second sealing element, the second sealing element preferably surrounds approximately 350° to approximately 355° of a circle in a cross-section, the center of which forms the central axis of the second contact element.

[0102] In an installation situation of the second sealing element, the cross-section is preferably taken parallel to a main extension plane of the cover element.

[0103] Additionally or alternatively, it may be provided that the second sealing element projects beyond the second cell terminal in a radial direction with respect to the central axis of the second contact element.

[0104] For example, a vent opening is formed over the second cell terminal by a protrusion of the second sealing element, particularly in the radial direction with respect to the central axis of the second contact element.

[0105] The central axis of the second contact element is preferably a central axis of the second cell terminal.

[0106] It can be advantageous if the first sealing element extends away from the base body of the cover element on an outer side of the cover element facing away from the interior of the electrochemical cell.

[0107] Preferably, the second sealing element extends away from the base body of the cover element on an outer side of the cover element facing away from the interior of the electrochemical cell.

[0108] The first sealing element and / or the second sealing element may have a cross-section that is at least rectangular or at least approximately oval. The cross-section is preferably parallel to the main plane of extension of the cover element.

[0109] Alternatively, it can be provided that the first sealing element and / or the second sealing element has one or more curved sections.

[0110] Additionally or alternatively, it may be provided that the first sealing element and / or the second sealing element has one or more projections which extend into an interior space surrounded by the respective sealing element.

[0111] The one or more protrusions form indentations in the respective connection area and / or are enclosed by the casting element.

[0112] It may be additionally or alternatively provided that the first sealing element and / or the second sealing element have one or more projections which are spaced apart from a base body radially surrounding the respective connection area. The one or more projections are in particular pedestal-shaped and / or cuboid-shaped.

[0113] For example, the first sealing element and / or the second sealing element have a wavy and / or jagged cross-section, at least in some areas.

[0114] Curvature(s), a wave shape and / or a serrated shape of the cross-section of the first sealing element and / or the second sealing element, as well as one or more protrusions, can increase the stability of a contact surface between the first sealing element and the first potting element and / or a contact surface between the second sealing element and the second potting element.

[0115] In particular, during the production of the first potting element and / or the second potting element, the adhesion of the first resin material to the first sealing element and / or the adhesion of the second resin material to the second sealing element can be optimized.

[0116] It may be provided that the first cell terminal and the first sealing element are flush with each other with respect to a radial direction of the central axis of the first contact element.

[0117] Additionally or alternatively, it can be provided that the second cell terminal and the second sealing element are flush with each other with respect to a radial direction of the central axis of the second contact element.

[0118] As an alternative to a flush finish, it can be provided that the first cell terminal extends laterally beyond the first sealing element on one or more sides and / or that the second cell terminal extends laterally beyond the second sealing element on one or more sides.

[0119] As an alternative to the aforementioned options, it can be provided - as already described - that the first sealing element extends laterally beyond the first cell terminal and / or that the second sealing element extends laterally beyond the second cell terminal.

[0120] Lateral projection of the first sealing element and / or the second sealing element beyond the respective cell terminal can be formed by using a first cell terminal and / or a second cell terminal which are smaller than the areas surrounded by the first sealing element and / or the second sealing element.

[0121] The lateral projection of the sealing elements beyond the cell terminals preferably forms vent openings through which air can escape when the first resin material and / or second resin material is poured in.

[0122] "Lateral" preferably refers to an orientation of the electrochemical cell in which the first and second cell terminals are at the top and a bottom side of the housing facing away from the cover element is arranged at the bottom.

[0123] It can be advantageous if a cavity for receiving the first resin material is formed between the first sealing element and the first cell terminal on a side of the cover element facing away from the interior.

[0124] In particular, the second sealing element and the second cell terminal on a side of the cover element facing away from the interior form a cavity for receiving the second resin material.

[0125] It can be advantageous if the first sealing element forms an electrical and / or thermal and / or spatial separation and / or insulation between the first cell terminal and the cover element.

[0126] Additionally or alternatively, the second sealing element may provide an electrical and / or thermal and / or spatial separation and / or insulation between the second cell terminal and the cover element.

[0127] For example, the first sealing element forms a support for the first cell terminal and / or the second sealing element forms a support for the second cell terminal.

[0128] Preferably, the first sealing element is applied to the base body of the cover element in a printing process, in particular in the form of a sealing bead.

[0129] The second sealing element is applied to the base body of the cover element, for example in a printing process, particularly in the form of a sealing bead.

[0130] For example, the first sealing element and / or the second sealing element are applied to the base body of the cover element using a pattern printing process, such as a screen printing process and / or stencil printing process and / or pad printing process.

[0131] Alternatively, it can be provided that the first sealing element is manufactured separately and / or is a separately handleable component.

[0132] In particular, the first sealing element is an insert, for example a plastic frame.

[0133] In embodiments with a separately manufactured first sealing element, this element is preferably inserted into a receiving space in the cover element that is designed complementarily to the first sealing element and / or into a receiving space in the first cell terminal that is designed complementarily to the first sealing element. This allows for positioning.

[0134] As a supplement to or alternative to a separately manufactured first sealing element, it may be provided that the second sealing element is manufactured separately and / or is a separately handleable component.

[0135] In particular, the second sealing element is an insert, for example a metal frame.

[0136] In embodiments with a separately manufactured second sealing element, this element is preferably inserted into a receiving space in the cover element that is designed complementarily to the second sealing element and / or into a receiving space in the second cell terminal that is designed complementarily to the second sealing element. This allows for positioning.

[0137] It may be provided that the first sealing element comprises or is formed from a third polymer material.

[0138] The second sealing element preferably comprises or is formed from a fourth polymer material.

[0139] The third polymer material and the fourth polymer material are particularly different from each other.

[0140] Alternatively, the third polymer material and the fourth polymer material are identical.

[0141] The third polymer material and / or the fourth polymer material preferably comprise one or more of the following materials: a thermosetting polymer material, a thermoplastic polymer material, an elastomeric polymer material or mixtures thereof.

[0142] For example, the third polymer material and / or the fourth polymer material comprise one or more of the following polymer materials or are formed from them: polyolefin, in particular polypropylene and / or polyethylene, polyester, in particular polyethylene terephthalate and / or polybutylene terephthalate, polyamide, polyimide, copolyamide, polyamide elastomer, polyether, in particular epoxy resins, polyurethane, polyurethane acrylate, polyvinyl chloride, polystyrene, polymethyl methacrylate, acrylonitrile butadiene styrene, synthetic rubber, in particular ethylene propylene diene monomer rubber, polycarbonate, polyethersulfone, polyoxymethylene, polyetheretherketone, polytetrafluoroethylene, silicone, in particular silicone rubber and / or silicone-based elastomer.

[0143] Thermoplastic polymer materials are preferred for the third and / or fourth polymer material. For example, hot melt materials are used for the third and / or fourth polymer material.

[0144] The third polymer material and / or the fourth polymer material preferably harden to form the first sealing element or the second sealing element, respectively.

[0145] It may be provided that the third polymer material and / or the fourth polymer material includes one or more fillers.

[0146] The one or more fillers are selected in particular from one or more of the following: inorganic fillers, in particular silicon oxide, carbonate, carbide, in particular silicon carbide, nitride, in particular metal nitride, metal oxide.

[0147] The use of one or more fillers preferably optimizes the settling behavior of the third polymer material and / or the fourth polymer material.

[0148] The fourth polymer material may comprise one or more conductive additives. The one or more conductive additives are selected, in particular, from one or more of the following: carbon materials, especially conductive carbon black, graphite, graphene, carbon nanotubes, carbon fibers and / or carbon nanobulbs; particulate metallic materials, especially metal powders; electrically conductive ceramic materials, especially nitrides and / or carbides; electrically conductive polymers, especially trans-polyacetylene, polypyrrole, polyaniline, poly(-phenylene), polythiophene and / or polystyrene-doped poly(3,4-ethylenedioxythiophene) (PEDOT: PSS).

[0149] Preferred particulate metallic materials preferably include or are formed from aluminium, copper, titanium, iron, silver.

[0150] In particular, the particulate metallic materials include alloys of the aforementioned materials or are formed from them.

[0151] The term "electrically conductive" refers in particular to an electrical conductivity of 10⁻¹ < S / m or more, especially 10⁶ < S / m or more.

[0152] Preferably, the fourth polymer material in embodiments in which a snap-on element is formed comprises one or more conductive additives.

[0153] It may be provided that the first sealing element forms a component of the cover element and is formed in particular by a protrusion of the cover element, especially one that is closed in an annular form or has at least one interruption.

[0154] The raised section of the cover element, which forms the first sealing element, preferably extends in a direction away from the base body of the cover element, pointing away from the interior of the electrochemical cell.

[0155] Additionally or alternatively, it may be provided that the second sealing element of the electrochemical cell forms a component of the cover element and is formed in particular by a protrusion of the cover element, for example, a ring-shaped closed section or having at least one interruption.

[0156] The raised section of the cover element, which forms the second sealing element, extends in particular along a direction away from the interior of the electrochemical cell and away from the base body of the cover element.

[0157] For example, the first sealing element and / or the second sealing element are formed by indentations and / or grooves in the cover element. The cover element is machined, for example, from an inner side facing the interior when installed.

[0158] As an alternative to the complete formation of the first sealing element by indentations and / or beads, it can be provided that the first sealing element comprises or is formed from at least one sealing bead and at least one bead.

[0159] For example, the first sealing element is formed in some areas from one or more sealing beads and in some areas from one or more beads.

[0160] As an alternative to the complete formation of the second sealing element by indentations and / or beads, it can be provided that the second sealing element comprises or is formed from at least one sealing bead and at least one bead.

[0161] For example, the second sealing element is formed in some areas from one or more sealing beads and in some areas from one or more beads.

[0162] Preferably, the second sealing element consists partly of at least one bead made of a metallic material and partly of at least one sealing bead made of a fourth polymer material. According to this embodiment, the fourth polymer material is preferably electrically insulating. The bead preferably sets the cover element to a potential and / or limits the current more effectively in the event of a fault, particularly since the partial construction of the second sealing element from an electrically insulating polymer material minimizes the contact area between the housing and the second cell terminal.

[0163] In embodiments in which the first sealing element and / or the second sealing element are formed by protrusions of the cover element, complementary indentations of the cover element on an inner side of the cover element facing the interior form, for example, positioning recesses.

[0164] Preferably, complementary positioning projections are formed in the insulating element, which in particular enable the positioning of the insulating element relative to the cover element.

[0165] It may be provided that the first contact element and / or the second contact element are designed as inserts in the insulating element.

[0166] In particular, a positive fit is formed between the first contact element and the insulating element and / or a positive fit between the second contact element and the insulating element. This, for example, provides leakage protection and / or seals against the first resin material and / or the second resin material.

[0167] The insulating element is preferably injection-molded onto the first contact element and / or the second contact element.

[0168] It can be advantageous if a contact area is formed between the first cell terminal and the first sealing element and / or a contact area is formed between the second cell terminal and the second sealing element.

[0169] It may be provided that the first sealing element and / or the second sealing element, particularly in embodiments in which these form a component of the cover element, have a treated surface and / or are subjected to a surface treatment.

[0170] For example, the second sealing element in a contact area with the second cell terminal is and / or is anodized and / or has a surface with increased roughness.

[0171] A surface with increased roughness can be created, for example, by sandblasting.

[0172] It can be arranged that the second contact element rests against the cover element in an area of ​​a second opening of the cover element and / or is in direct material and / or electrical contact with it. In this way, the cover element can be brought to the potential of the second cell terminal.

[0173] It can be advantageous for the first contact element to comprise at least two contact element components, which in particular comprise or are formed from different metallic materials.

[0174] For example, a first contact element component of the first contact element comprises a first metallic material, for example aluminum, or is formed from it, and a second contact element component of the first contact element comprises a second metallic material, for example copper, or is formed from it.

[0175] The at least two contact element components of the first contact element are preferably joined together in the first connection area by means of a material bond, for example by laser welding and / or roll cladding.

[0176] Alternatively, it can be provided that the at least two contact element components of the first contact element are joined together outside the first connection area, for example on a side facing the electrochemical element, by means of a material bond, in particular by laser welding and / or roll cladding.

[0177] It may be provided that the first contact element includes a third contact element component, which is connected, for example, to the first contact element component and / or to the second contact element component.

[0178] Additionally or alternatively, it may be provided that the second contact element comprises at least two contact element components.

[0179] The at least two contact element components of the second contact element are joined together in the second connection area by means of a material bond, in particular by laser welding and / or roll cladding.

[0180] Alternatively, it can be provided that the different contact element components of the second contact element are joined together outside the second connection area, for example on a side facing the electrochemical element, by means of a material bond, in particular by means of laser welding and / or roll cladding.

[0181] In embodiments where the second contact element comprises a first contact element section and a second contact element section, these are preferably formed from or comprise the same metallic material. Aluminum is preferred as the metallic material for the second contact element.

[0182] In addition to a first contact element component and a second contact element component of the second contact element, the second contact element may comprise a third contact element component, which is materially bonded to the first contact element component and / or to the second contact element component of the second contact element. This material bonding is achieved, for example, by laser welding and / or roll cladding.

[0183] The first contact element and / or the second contact element are preferably made of a flat material.

[0184] The first contact element and / or the second contact element are preferably configured in a cross-section that is at least approximately in the shape of an inverted T or an L. The cross-section is preferably parallel to a main face of the electrochemical cell.

[0185] Preferably, the second contact element has at least one locking element. The at least one locking element is formed, in particular, by a region of a locally reduced cross-sectional area of ​​the second contact element.

[0186] The cross-sectional area is preferably defined perpendicular to a principal extension direction and / or perpendicular to a central axis of the second contact element.

[0187] The at least one safety element is preferably at least one fuse.

[0188] It can be advantageous if at least one locking element is located in the second connection area.

[0189] The at least one safety element provides, in particular, overcurrent protection, which melts when a critical current and / or a critical voltage is exceeded.

[0190] As an alternative to arranging the at least one locking element in the second connection area, it may be provided that the at least one locking element is arranged outside the second connection area.

[0191] For example, at least one safety element is a component of the second connecting conductor.

[0192] It may be provided that the at least one locking element is encased in a polymer material, preferably an electrolyte-resistant thermoplastic polymer material.

[0193] It can be advantageous if the first contact element has a first resin material filling opening for filling the first resin material into the first connection area.

[0194] Preferably, the second contact element has a second resin material filling opening for filling the second resin material into the second connection area.

[0195] It can be advantageous if the first connecting conductor has an average thickness that is approximately 1 / 10 or less of the average width of the first connecting conductor taken perpendicular to its thickness.

[0196] Preferably, the average thickness of the first connecting conductor is approximately 0.8 mm or less, for example approximately 0.7 mm or less.

[0197] It can be advantageous if the second connecting conductor has an average thickness that is approximately 1 / 10 or less of the average width of the second connecting conductor taken perpendicular to its thickness.

[0198] Preferably, the average thickness of the second connecting conductor is approximately 0.8 mm or less, for example approximately 0.7 mm or less.

[0199] Due to the aforementioned average thicknesses of the first connecting conductor and / or the second connecting conductor, material embossing during the manufacture of the connecting conductors is preferably unnecessary.

[0200] The first connecting conductor and / or the second connecting conductor preferably each have a homogeneous thickness over their entire extent.

[0201] The comparatively small average thickness of the first connecting conductor and / or the second connecting conductor allows for material savings. This can reduce the costs for the corresponding components.

[0202] According to a preferred embodiment, the first contact element in a first joining area has an average thickness which is approximately 2 / 10 or less, in particular approximately 1 / 10 or less, of an average width of the first contact element taken perpendicular to the thickness.

[0203] The average thickness of the first contact element in the first joining area is preferably approximately 0.8 mm or less, for example approximately 0.7 mm or less.

[0204] The first joining area is preferably an area in which the first contact element and the first cell terminal are connected. In particular, the first contact element in the first joining area passes through a through-opening of the first cell terminal.

[0205] It can be advantageous if the second contact element in a second joining area has an average thickness which is approximately 2 / 10 or less, in particular approximately 1 / 10 or less, of an average width of the second contact element taken perpendicular to the thickness.

[0206] Preferably, the average thickness of the second contact element in the second joining area is approximately 0.8 mm or less, for example approximately 0.7 mm or less.

[0207] The second joining area is preferably an area in which the second contact element and the second cell terminal are connected to each other. For example, in the second joining area, the second contact element is guided through a through-opening of the second cell terminal.

[0208] It can be advantageous if the average width of the first contact element in a first joining area with the first cell terminal is approximately ½ or less, in particular 2 / 5 or less, than the average width of the first cell terminal in a direction parallel to the width of the first contact element.

[0209] It can be advantageous if the average width of the first contact element in the first joining area is approximately 10.0 mm or less, for example approximately 9.5 mm or less.

[0210] Preferably, the average width of the second contact element in a second joining area with the second cell terminal is approximately ½ or less, in particular 2 / 5 or less, than the average width of the second cell terminal in a direction parallel to the width of the second contact element.

[0211] In particular, the average width of the second contact element in the second joining area is approximately 10.0 mm or less, for example approximately 9.5 mm or less.

[0212] The average thickness of the first contact element in the first joining area is preferably essentially identical to an average length of the passage opening of the first cell terminal in the first joining area.

[0213] In particular, the average thickness of the second contact element in the second joining area is essentially identical to the average length of the passage opening of the second cell terminal in the second joining area.

[0214] Preferably, the average width of the first contact element in the first joining area corresponds essentially to an average width of the passage opening of the first cell terminal.

[0215] In particular, the average width of the second contact element in the second joining area essentially corresponds to an average width of the passage opening of the second cell terminal.

[0216] It can be advantageous if the first connecting conductor and the first contact element are formed in one piece and / or if the second connecting conductor and the second contact element are formed in one piece.

[0217] The first contact element is preferably formed in a cross-section that is at least approximately rectangular in a cross-section taken parallel to a principal extension plane of the cover element. In particular, the second contact element is formed in a cross-section that is at least approximately rectangular in a cross-section taken parallel to the principal extension plane of the cover element.

[0218] It may be provided that the average thickness of the cover element in a cross-section taken perpendicular to its main plane of extension is approximately 1 / 10 or less, for example approximately 1 / 20 or less, of the average width of the cover element perpendicular to its thickness. For example, the average thickness of the cover element is approximately 1.9 mm or less, for example approximately 1.8 mm or less.

[0219] The aforementioned dimensions allow the electrochemical cell to be manufactured relatively inexpensively.

[0220] It may be provided that the electrochemical cell includes at least one snap-action element which, when a critical pressure and / or a critical temperature is exceeded in the interior of the electrochemical cell, can be deflected and / or is deflected outwards from a rest state to an operating state, thus establishing an electrical contact between the cover element and the first cell terminal.

[0221] By deflecting the at least one snap-action element from the rest state to the working state, an electrically conductive connection is established between the cover element and the first cell terminal, which initially has a polarity opposite to that of the cover element.

[0222] The snap-lock element can be welded into a housing cover of the electrochemical cell housing.

[0223] The snap-on element is deflected outwards at a predetermined internal cell pressure, thereby establishing an electrically conductive connection between the cover element and the first cell terminal.

[0224] The increased internal cell pressure arises primarily from electrochemical processes and the heat generated during overcharging of the electrochemical cell. Since the cover element is at the opposite electrical potential, for example, the potential of the second cell terminal, the electrochemical cell is short-circuited by the contact of the snap-on element with the first cell terminal.

[0225] The short circuit can, for example, trigger at least one safety element, such as at least one fuse.

[0226] Once at least one safety element has been triggered, there is no longer an electrical connection between the cell terminal and the electrochemical element inside the electrochemical cell, so the electrochemical cell can no longer be charged. This prevents further overcharging of the cell.

[0227] Preferably, the first contact element is connected to the insulating element of the electrochemical cell by a material bond and / or a form-fit and / or a force-fit.

[0228] Additionally or alternatively, it may be provided that the second contact element is connected to the insulating element of the electrochemical cell by a material-bonded and / or form-bonded and / or force-bonded connection.

[0229] For example, the first contact element and / or the second contact element engage behind the insulating element in a direction arranged perpendicular to a principal extension plane of the cover element.

[0230] It can be advantageous if the insulating element is connected to the cover element on an inner side facing the interior.

[0231] The insulating element preferably has at least one filling opening adjacent to the first connection area and / or adjacent to the second connection area for filling the first resin material into the first connection area and / or for filling the second resin material into the second connection area.

[0232] This can facilitate and / or enable the filling of the first resin material and / or the second resin material.

[0233] It may be provided that at least one filling opening is connected to at least one filling channel, which in particular connects the at least one filling opening to a recess of the insulating element, which limits the first connection area or the second connection area.

[0234] It can be advantageous if two filling channels are formed, which have at least an approximately Y-shaped cross-section and each open into a recess of the insulating element.

[0235] It can be advantageous if the insulating element of the electrochemical cell has several recesses for receiving the first potting element and / or the second potting element, wherein in particular one or more flow guide elements are arranged in each of the recesses for distributing the first resin material and / or the second resin material during the manufacture of the electrochemical cell.

[0236] The indentations are, for example, pocket-shaped.

[0237] In a state where the insulating element is connected to the covering element, the recesses preferably form a cavity for receiving the first resin material and / or the second resin material.

[0238] The one or more flow-guiding elements preferably have a cross-section that is at least approximately rectangular, an oval cross-section that is at least approximately oval, or a spiral cross-section that is at least approximately spiral.

[0239] Alternatively, the cross-section of one or more flow-guiding elements is V-shaped.

[0240] The cross-section is preferably taken parallel to a principal extension plane of the insulating element.

[0241] Optimized properties are preferably achieved when the following are achieved in the first connection area and / or the second connection area: a distance between the cover element and the first cell terminal in a direction parallel to the central axis of the first contact element and / or a distance between the cover element and the second cell terminal in a direction parallel to the central axis of the second contact element is 0.05 mm or more; and / or a distance between the first contact element and the cover element in the region of the first opening of the cover element and / or a distance between the second contact element and the cover element in the region of the second opening of the cover element is 0.05 mm or more; and / or a ratio between the first-mentioned distance and a thickness of the cover element is in the range of approximately 0.005 to 1.

[0242] The present invention further relates to an electrochemical system comprising one or more electrochemical cells according to the invention.

[0243] The electrochemical system according to the invention preferably has one or more of the features described in connection with the electrochemical cell according to the invention and / or one or more of the advantages described in connection with the electrochemical cell according to the invention.

[0244] The present invention further relates to a method for manufacturing an electrochemical cell, in particular an electrochemical cell according to the invention.

[0245] The method preferably includes providing a cover element which includes a first opening and / or a second opening.

[0246] The first opening, for example, is at least an anode opening.

[0247] The second opening, for example, is at least a cathode opening.

[0248] Alternatively, it can be provided that the first opening is at least a cathode opening and / or that the second opening is at least an anode opening.

[0249] Preferably, a first contact element, which is connected or connectable to a first cell terminal, is positioned in the first opening.

[0250] Additionally or alternatively, a second contact element, which is connected or connectable to a second cell terminal, is positioned in the second opening.

[0251] Preferably, a first resin material is poured into a first connection area surrounded by the cover element, the first contact element and in particular the first cell terminal using a casting process.

[0252] Additionally or alternatively, a second resin material is poured into a second connection area surrounded by the cover element, the second contact element and in particular the second cell terminal using a casting process.

[0253] The process preferably further comprises drying and / or curing the first resin material to form a first casting element and / or drying and / or curing the second resin material to form the second casting element.

[0254] The cover element is then preferably connected to another housing component of the housing, in particular by means of a material bond, for example by welding.

[0255] The method according to the invention preferably has one or more of the features described in connection with the electrochemical cell according to the invention and / or one or more of the advantages described in connection with the electrochemical cell according to the invention.

[0256] Preferably, at least one first sealing element is applied to and / or inserted into the cover element on an outer surface of the cover element facing away from an interior of the electrochemical cell, which radially surrounds the first connection area with respect to a central axis of the first contact element.

[0257] Additionally or alternatively, at least one second sealing element is applied to and / or inserted into the cover element on an outer surface of the cover element facing away from the interior of the electrochemical cell, which radially surrounds the second connection area with respect to a central axis of the second contact element.

[0258] It can be advantageous if the cover element is connected to an insulating element in a force-fit and / or form-fit manner before, during or after the filling of the first resin material and / or the second resin material.

[0259] The first cell terminal is preferably joined to the first contact element by means of a material bond, for example by laser welding, before or after the potting of the first contact element and / or the production of the first potting element.

[0260] The second cell terminal is preferably joined to the second contact element by means of a material bond, for example by laser welding, before or after the potting of the second contact element and / or the production of the second potting element.

[0261] It may be provided that a relative position of the cover element and the insulating element is fixed during the drying and / or curing of the first resin material and / or second resin material by means of a holding element, for example by means of a hold-down device.

[0262] After the cell terminals have been determined, the corresponding assembly is preferably hardened, for example in a hardening line.

[0263] In addition to or as an alternative to the use and / or manufacture of sealing elements, a first recessed area may be incorporated into a base body of the cover element, for example by embossing. The first recessed area preferably serves as a receptacle for the first potting element.

[0264] In particular, the first resin material is poured into the first recessed area in a flowable state.

[0265] According to a preferred embodiment, a second recessed area is incorporated into the cover element, for example by embossing. The second recessed area preferably serves as a receptacle for the second potting element.

[0266] In particular, the second resin material is poured into the second recessed area in a flowable state.

[0267] It can be advantageous if the first resin material is poured through a first resin material filling opening in the first contact element into a cavity that forms the first potting element in the cured state.

[0268] Preferably, the second resin material is filled through a second resin material filling opening in the second contact element into a cavity that forms the second potting element in the cured state.

[0269] Alternatively, filling can be done via filling openings in the insulating element (as described above).

[0270] Further preferred features and / or advantages of the invention are the subject of the following description and the graphic representation of exemplary embodiments.

[0271] They show: Fig. 1 a schematic sectional view of a first embodiment of an electrochemical cell, in which a first contact element is fixed to a cover element of a housing by means of a first potting element and in which a second contact element is fixed to the cover element by means of a second potting element; Fig. 2 a schematic sectional view of the first contact element made of Fig. 1 , wherein a first contact element component and an L-shaped second contact element component of the first contact element are materially bonded to each other; Fig. 3 a schematic top view of the first contact element along a Fig. 2 direction marked III; Fig. 4 a schematic sectional view of the second contact element made of Fig. 1 , wherein the second contact element has an L-shape; Fig. 5 a schematic top view of the second contact element along a Fig. 4direction marked V; Fig. 6 a section of the schematic sectional view from Fig. 1 ; Fig. 7 an enlarged view of the in Fig. 6 area designated VII; Fig. 8 a schematic top view of the cover element of the electrochemical cell made of the Figs. 1 to 7 Fig. 9 a schematic top view of the cover element of the electrochemical cell from the Fig. 1 during the manufacture of the electrochemical cell, wherein a first sealing element is applied around a first opening of the cover element and spaced apart from it, and wherein a second sealing element is applied around a second opening of the cover element and spaced apart from it; Fig. 10 a schematic top view of the insulating element of the electrochemical cell made of Fig. 1Fig. 11 a schematic top view of an insulating element of a further embodiment of an electrochemical cell, wherein the insulating element is formed in two parts; Fig. 12 a schematic top view of an insulating element of a further embodiment of an electrochemical cell, wherein the insulating element has a compensating element centrally between a first opening for the passage of the first contact element and a second opening for the passage of the second contact element; Fig. 13 a schematic top view of a section of a further embodiment of an electrochemical cell, in which a first recess of the first cell terminal is at least approximately oval and in which a second recess of the second cell terminal is at least approximately oval; Fig. 14 a schematic top view of the cover element made of Fig. 13during the manufacture of the electrochemical cell; Fig. 15 a schematic top view of the insulating element of a further embodiment of an electrochemical cell made from the Fig. 13 and 14 , wherein the insulating element has an at least approximately oval first opening and an at least approximately oval second opening, and wherein the insulating element is optionally designed in two parts; Fig. 16 a schematic top view of a section of a further embodiment of an electrochemical cell, in which a through-opening of the first cell terminal and a through-opening of the second cell terminal each have a principal direction of extension which are arranged at least approximately parallel to a main side of the electrochemical cell; Fig. 17 a schematic top view of a section of the electrochemical cell made of Fig. 16during manufacturing; Fig. 18 a schematic sectional view of a section of a further embodiment of an electrochemical cell, in which a safety element of the second contact element in the form of a fuse is arranged outside a second connection area; Fig. 19 a schematic sectional view of a section of a further embodiment of an electrochemical cell; Fig. 20 a schematic sectional view of a section of a further embodiment of an electrochemical cell, wherein the first potting element and the second potting element do not engage behind the cover element in a direction arranged perpendicular to a principal extension plane of the cover element; Fig.21 a schematic sectional view of a section of a further embodiment of an electrochemical cell, wherein the electrochemical cell comprises a snap-on element in the form of a spring element, by means of which the first cell terminal can be electrically contacted with the cover element in the event of exceeding a critical pressure and / or a critical temperature in an interior of the electrochemical cell; Fig. 22 a schematic top view of the cover element of the electrochemical cell made of . Fig. 21 during the manufacture of the electrochemical cell; Fig. 23 a schematic top view of the insulating element of the electrochemical cell made from the Fig. 21 and 22Fig. 24 is a schematic sectional view of a section of another embodiment of an electrochemical cell, in which the first contact element and the second contact element each have an at least approximately T-shaped cross-section; Fig. 25 is a schematic sectional view of the first contact element made of Fig. 24 , which comprises three contact element components; Fig. 26 a schematic top view of the first contact element along a Fig. 25 direction designated XXVI; Fig. 27 a schematic sectional view of the second contact element made of Fig. 24 , which comprises at least two contact element components; Fig. 28 a top view of the second contact element made of Fig. 27 along a in Fig. 27direction designated XXVIII; Fig. 29 a schematic sectional view of a first contact element of a further embodiment of an electrochemical cell, which is at least approximately oval in a cross-section taken parallel to a principal extension plane of the cover element; Fig. 30 a schematic top view of the first contact element made of Fig. 29 along a in Fig. 29 direction marked XXX; Fig. 31 a schematic sectional view of a second contact element of the electrochemical cell from the Figs. 29 and 30 , wherein the second contact element is at least approximately oval in cross-section taken parallel to the main extension plane of the cover element; Fig. 32 a schematic top view of the second contact element made of Fig. 31 along a in Fig. 31direction designated XXXII; Fig. 33 a schematic sectional view of a section of a further embodiment of an electrochemical cell, in which projections of the cover element form lateral boundaries of the first potting element and the second potting element; Fig. 34 a schematic top view of the cover element of the electrochemical cell made of Fig. 33 during the manufacture of the electrochemical cell; Fig. 35 a schematic top view of an insulating element of the electrochemical cell made from the Fig. 34 and 35, wherein the insulating element has several positioning projections, each having an at least approximately rectangular cross-section; Fig. 36 a schematic sectional view of a section of a further embodiment of an electrochemical cell, in which the first contact element and the second contact element are each connected to the insulating element by friction and / or form-fitting; Fig. 37 a schematic sectional view of a section of a further embodiment of an electrochemical cell, in which the insulating element has a first filling opening for filling a first resin material into the first connection area and a second filling opening for filling a second resin material into the second connection area; Fig.Fig. 38 A schematic sectional view of a section of a further embodiment of an electrochemical cell, in which the second cell terminal rests against a projection of the cover element designed as a second sealing element; Fig. 39 A schematic sectional view of a section of a further embodiment of an electrochemical cell, in which the second contact element is in material contact with an edge region of a second opening of the cover element; Fig. 40 A schematic sectional view of a further embodiment of an electrochemical cell, in which the first contact element is connected laterally to the electrochemical element by means of a first connecting conductor and the second contact element is connected laterally to the electrochemical element by means of a second connecting conductor; Fig. 41 A schematic sectional view of the first contact element and the first cell terminal of the electrochemical cell from the . Fig. 40; Fig. 42 a schematic top view of the first contact element from the Fig. 41 along a in Fig. 41 direction designated XLII; Fig. 43 a schematic sectional view of the second contact element and the first cell terminal of the electrochemical cell from the Fig. 40 ; Fig. 44 a schematic top view of the second contact element from the Fig. 43 along a in Fig. 43in the direction designated XLIV; Fig. 45 a schematic sectional view of a section of a further embodiment of an electrochemical cell, in which the first resin material is filled into the first connection area and / or the second resin material is filled into the second connection area from a side facing the interior; Fig. 46 a schematic sectional view of a section of a further embodiment of an electrochemical cell, in which the first contact element and the second contact element are each thinner on a side facing the interior; Fig. 47 a schematic sectional view of a section of a further embodiment of an electrochemical cell, in which the cover element and the insulating element can be held together by means of the first contact element and / or the second contact element when forming the first potting element and / or the second potting element; Fig.48 a schematic sectional view of the first contact element and the first cell terminal of the electrochemical cell made of . Fig. 47 ; Fig. 49 a schematic top view of the first contact element made of Fig. 48 along a in Fig. 48 direction designated XLIX; Fig. 50 a schematic sectional view of the second contact element and the second cell terminal of the electrochemical cell from the Fig. 47 ; Fig. 51 a schematic top view of the second contact element made of Fig. 50 along a in Fig. 50direction designated LI; Fig. 52 a schematic top view of an insulating element of a further embodiment of an electrochemical cell, in which the insulating element has pocket-like recesses in the area of ​​the first connection area and in the area of ​​the second connection area, in which V-shaped flow guide elements are arranged; Fig. 53 a schematic sectional view of the insulating element made of Fig. 52 along a in Fig. 52plane designated LIII; Fig. 54 a schematic top view of an insulating element of a further embodiment of an electrochemical cell, in which two flow guide elements are arranged spaced apart from each other in a first recess and in a second recess of the insulating element; Fig. 55 a schematic top view of an insulating element of a further embodiment of an electrochemical cell, in which a first pocket-like recess and a second pocket-like recess are formed, wherein positioning projections arranged in the pocket-like recesses serve as flow guide elements; Fig. 56 a schematic top view of an insulating element of a further embodiment of an electrochemical cell, in which the insulating element has a first filling channel for filling the first recess and a second filling channel for filling the second recess; Fig.57 A schematic top view of an insulating element of a further embodiment of an electrochemical cell, in which the insulating element has several filling openings arranged in the edge regions of the first recess and several filling openings arranged in the edge regions of the second recess; Fig. 58 A schematic top view of an insulating element of a further embodiment of an electrochemical cell, in which the insulating element has a first flow guide element arranged spirally around a first opening of the insulating element and a second flow guide element arranged spirally around a second opening of the insulating element; Fig.59 A schematic top view of an insulating element of a further embodiment of an electrochemical cell, in which a first flow guide element surrounds the first opening of the insulating element at an equidistant distance and in which a second flow guide element surrounds the second opening of the insulating element at an equidistant distance, wherein the heights of the flow guide elements may differ; Fig. 60 A schematic top view of a variant of a sealing element, according to which the sealing element has a cross-section that is at least approximately rectangular; Fig. 61 A schematic top view of a further variant of a sealing element, according to which the sealing element has at least one interruption on a side facing away from the opening of the cover element; Fig. 62 A schematic top view of a further variant of a sealing element, according to which the sealing element has a cross-section of a truncated ellipse; Fig.63 A schematic top view of a further variant of a sealing element, according to which the sealing element has a bulge on a side facing away from the opening of the cover element; Fig. 64 A schematic top view of a further variant of a sealing element, according to which the sealing element has two adjacent bulges on a side facing away from the opening of the cover element; Fig. 65 A schematic top view of a further variant of a sealing element, according to which the sealing element has inwardly projecting projections, the principal direction of extension of which is at least approximately parallel to a principal direction of extension of the opening of the cover element; Fig. 66 A schematic top view of a further variant of a sealing element, according to which the inwardly projecting projections of the sealing element are inclined towards the opening of the cover element; Fig.67 A schematic top view of another variant of a sealing element, according to which three inwardly projecting protrusions of the sealing element are arranged alternately on opposite sides of the sealing element; Fig. 68 A schematic top view of another variant of a sealing element, according to which the inwardly projecting protrusions are inclined away from the opening of the cover element; Fig. 69 A schematic top view of another variant of a sealing element, according to which several protrusions of the sealing element are spaced apart from and surrounded by a base body of the sealing element; Fig. 70 A schematic top view of another variant of a sealing element, according to which the sealing element has a protrusion which has an at least approximately circular cross-section and which is arranged spaced apart from the base body of the sealing element; Fig.71 A schematic top view of another variant of a sealing element, according to which the projection has an at least approximately oval cross-section; Fig. 72 A schematic top view of another variant of a sealing element, according to which the sealing element comprises a base body made of a polymer material and at least one projection made of a metallic material; Fig. 73 A schematic top view of a cell terminal, in which an opening is at least approximately rectangular and has a principal direction of extension which is arranged at least approximately parallel to a narrow side of the cell terminal; Fig. 74 A schematic top view of a cell terminal, in which a principal direction of extension of the opening is arranged at least approximately parallel to a broad side of the cell terminal; Fig.75 A schematic top view of a cell terminal in which an opening is at least approximately oval and has a principal extension direction which is arranged at least approximately parallel to a narrow side of the cell terminal; Fig. 76 A schematic top view of a cell terminal in which a principal extension direction of the opening is arranged at least approximately parallel to a broad side of the cell terminal; Fig. 77 A schematic perspective view of a section of a further embodiment of an electrochemical cell in which the second cell terminal is arranged on a second recessed area of ​​the cover element; Fig. 78 A schematic perspective view of the cover element made of . Fig. 77, in which the second recessed area forms a potting basin for the second potting element; Fig. 79 a schematic perspective view of a section of the embodiment of an electrochemical cell from the Figs. 77 and 78 , in which the first contact element has a first filling opening for the first resin material and in which the second contact element has a second filling opening for the second resin material; Fig. 80 a schematic perspective sectional view of a section of the electrochemical cell from the Figs. 77 to 79 , in which the second cell terminal, the second contact element and part of the second connecting conductor are shown; Fig. 81 a schematic perspective sectional view of a section of the electrochemical cell from the Figs. 77 to 80, in which the first cell terminal, the first contact element and part of the first connecting conductor are shown; Fig. 82 a schematic perspective view of the second contact element of the embodiment of an electrochemical cell from the Figs. 77 to 81 , wherein the second contact element is connected to the second connecting conductor, wherein the second contact element and the second connecting conductor form at least approximately an L-shape in a cross-section taken perpendicular to the main extension plane of the cover element; Fig. 83 a schematic perspective view of the first contact element of the embodiment of an electrochemical cell made of the Figs. 77 to 82, wherein the first contact element is connected to the first connecting conductor, wherein the first contact element and the first connecting conductor form at least approximately an L-shape in a cross-section taken perpendicular to the main extension plane of the cover element; Fig. 84 a schematic perspective view of a section of a further embodiment of an electrochemical cell in which the connecting conductors, the cell terminals and / or the insulating element have reduced thicknesses and / or in which the first cell terminal and / or the second cell terminal have openings which have a reduced average width; Fig. 85 a schematic perspective view of a section of the electrochemical cell made of Fig. 84, wherein the first contact element and the first connecting conductor are formed in one piece and / or wherein the second contact element and the second connecting conductor are formed in one piece; Fig. 86 a schematic perspective view of the first contact element and part of the first connecting conductor of the electrochemical cell made of the Fig. 84 and 85 , wherein the first contact element and the first connecting conductor are formed at least approximately in a step-like manner in a cross-section taken perpendicular to the main extension plane of the cover element; and Fig. 87 a schematic perspective view of the second contact element and a part of the second connecting conductor of the electrochemical cell made of the Figs. 84 to 86 , wherein the second contact element and the second connecting conductor are formed at least approximately in a stepped shape in a cross-section taken perpendicular to the main extension plane of the cover element.

[0272] Identical or functionally equivalent elements are provided with the same reference symbols in all figures.

[0273] In the Figs. 1 to 10 A first embodiment of an electrochemical cell designated as a whole by 100, as well as individual components thereof, is shown.

[0274] The electrochemical cell 100 is, for example, a battery cell and / or an accumulator cell.

[0275] Preferably, the electrochemical cell 100 is a lithium-ion cell.

[0276] The electrochemical cell 100 preferably forms a component of an electrochemical system 102, which in particular comprises several electrochemical cells 100.

[0277] The electrochemical system 102 is, for example, an accumulator module and / or a battery module.

[0278] For example, the electrochemical cell 100 is used in a vehicle.

[0279] The electrochemical cell 100 preferably comprises a housing 104 for receiving an electrochemical element 106. The housing 104 surrounds an interior 108 of the electrochemical cell 100 and includes a cover element 110 as a first housing component.

[0280] The cover element 110 preferably covers a further housing component 112 of the housing 104 and / or is and / or is fluid-tightly connected to the further housing component 112.

[0281] The further housing component 112 is in particular trough-shaped or cup-shaped. It surrounds the interior 108 of the electrochemical cell 100 preferably on five sides.

[0282] Preferably, the housing 104 of the electrochemical cell 100 is designed to be at least approximately cuboid in shape.

[0283] It can be advantageous if the cover element 110 is plate-shaped, for example made of sheet metal. In particular, the cover element 110 comprises a metallic material, for example aluminum, or is formed from the metallic material. For example, the cover element 110 is formed from a metal sheet, for example from an aluminum sheet.

[0284] The cover element 110 is and / or is preferably materially bonded to the further housing component 112 of the housing 104, preferably by welding, for example by laser welding.

[0285] The electrochemical element 106 is in particular a so-called cell coil.

[0286] It can be advantageous if the electrochemical element 106 is connected to or includes a first connecting conductor 114 and a second connecting conductor 116.

[0287] The first connecting conductor 114 serves in particular to provide an electrical connection between the electrochemical element 106 and a first cell terminal 118 of the electrochemical cell 100, in particular via a first contact element 120 of the electrochemical cell 100.

[0288] The second connecting conductor 116 preferably serves to electrically connect the electrochemical element 106 with a second cell terminal 122 of the electrochemical cell 100, in particular via a second contact element 124 of the electrochemical cell 100.

[0289] The second cell terminal 122 preferably comprises a first metallic material, for example aluminium, or is formed from it.

[0290] For example, the second cell terminal 122 is configured as a cathode.

[0291] Alternatively, the second cell terminal 122 can be configured as an anode (not shown).

[0292] The electrical connection of the electrochemical element 106 with the first cell terminal 118 and / or the second cell terminal 122 is provided in particular by the fact that the respective connecting conductor 114, 116 is fixed on the one hand to the electrochemical element 106 and on the other hand to the respective contact element 120, 124.

[0293] In the present case, the first connecting conductor 114 and / or the second connecting conductor 116 are fixed to the electrochemical element 106 on a side of the electrochemical element 100 facing the cover element 110, in particular from above.

[0294] The first cell terminal 118 preferably comprises a first metallic material, for example aluminium, or is formed from it.

[0295] For example, the first cell terminal 118 is configured as an anode.

[0296] Alternatively, the first cell terminal 118 can be a cathode (not shown).

[0297] It can be advantageous if the first cell terminal 118 has a through-opening 119 through which a first contact element component 120a of the first contact element 120 is passed (cf. Fig. 8 ).

[0298] The first cell terminal 118 and the second cell terminal 122 are identically designed in this case. Cell terminals 118 and 122 are shown separately in Fig. 73 shown.

[0299] The passage opening 119 of the first cell terminal 118 has in particular a shape which is at least approximately complementary to a cross-section of the first contact element 120.

[0300] For example, the first cell terminal 118 and / or the second cell terminal 122 each have a cuboid-shaped recess.

[0301] The first cell terminal 118 is preferably connected to a first contact element component 120a of the first contact element 120 by means of a material bond, for example by welding.

[0302] The first contact element component 120a preferably comprises the same material as the first cell terminal 118 or is formed from it.

[0303] It can be advantageous if the first contact element component 120a of the first contact element 120 comprises or is formed from aluminium.

[0304] The first contact element 120 preferably comprises a second contact element component 120b, which in particular comprises or is formed from a second metallic material. The second metallic material differs in particular from the first metallic material.

[0305] For example, the second contact element component 120b of the first contact element 120 comprises or is formed from copper.

[0306] It can be advantageous if the first contact element component 120a and the second contact element component 120b of the first contact element 120 are joined together by material bonding, for example by laser welding and / or roll cladding.

[0307] It can be provided that the second contact element component 120b has at least an approximate L-shape in a cross-section taken perpendicular to a main face of the electrochemical cell 100. During manufacturing, the second contact element component is preferably bent into the L-shape.

[0308] Because one leg of the L-shape has a main extension plane which is arranged at least approximately parallel to a main extension plane of the cover element 110, a planar connection of the first connecting conductor 114 to the second contact element component 120b can be made.

[0309] It can be advantageous if the first connecting conductor 114 is fixed to a leg of the first contact element 120 facing away from the first cell terminal 118, for example on an underside of the same facing away from the cover element 110, in a materially bonded manner, in particular by welding.

[0310] The cover element 110 preferably comprises a first opening 126a through which the first contact element 120 is passed.

[0311] The first opening 126a of the cover element 110 is, for example, at least one anode opening.

[0312] Alternatively, it can be provided that the first opening 126a of the cover element 110 is at least a cathode opening (not shown).

[0313] It can be advantageous if the first contact element 120 and the first cell terminal 118 attached to it are fixed in a first connection area 130 by means of a first potting element 128.

[0314] The first potting element 128 preferably completely fills the first connection area 130.

[0315] For example, an area formed in the region of the first opening 126a between the cover element 110 and the first contact element 120 is completely filled.

[0316] The first potting element 128 is preferably formed from a first polymer material which comprises or is formed from a first resin material.

[0317] It can be advantageous if the first resin material comprises or is formed from one or more of the following materials: epoxy resin material, phenolic resin material, aminoplast material, polyurethane material, silicone material, polyester resin material, ABS resin material.

[0318] It can be advantageous if the first resin material, in a cured state, has a hardness of approximately 40 Shore D or more, especially approximately 50 Shore D, for example approximately 60 Shore D or more, compared to the first polymer material.

[0319] The hardness of the first resin material in a cured state compared to the first polymer material is approximately 100 Shore D or less, in particular approximately 97 Shore D or less, for example approximately 95 Shore D or less.

[0320] The hardness is determined in particular according to DIN EN ISO 868.

[0321] It can be advantageous if the first resin material has a glass transition temperature of approximately 90 °C or more, particularly approximately 95 °C or more, for example approximately 100 °C or more. The glass transition temperature is preferably based on a cured state of the first resin material relative to the first polymer material.

[0322] Preferably, the first resin material is a one-component resin material, for example a one-component epoxy resin material.

[0323] One-component epoxy resin materials preferably exhibit increased stability towards an electrolyte which is contained in the interior 108.

[0324] It can be advantageous if the first resin material comprises one or more fillers. The one or more fillers are preferably selected from: inorganic fillers, in particular silicon oxide, carbonate, carbide, in particular silicon carbide, nitride, in particular metal nitride, metal oxide.

[0325] Preferred silicon oxides are silicates.

[0326] By using fillers, oxygen diffusion and / or water diffusion from the environment of the electrochemical cell 100 into the interior 108 via the first potting element 128 can be avoided or reduced.

[0327] It can be advantageous if the connection area 130 and / or the first potting element 128 is bordered on an outer side of the cover element 110 facing away from the interior 108 of the electrochemical cell by an underside of the first cell terminal 118 facing the interior 108 of the electrochemical cell 100 and laterally by a first sealing element 134.

[0328] The first sealing element 134 is preferably applied to a top side of the cover element 110 facing away from the interior 108 by a printing process, for example a pattern printing process, in particular a screen printing process, a stencil printing process and / or a pad printing process.

[0329] For example, a third polymer material is applied to the top of the cover element 110 by means of an application element and is subsequently cured and / or dried.

[0330] For example, the first sealing element 134 is and / or is formed by a sealing bead.

[0331] It can be advantageous if the third polymer material comprises or is formed from a thermoplastic polymer material, a thermosetting polymer material and / or an elastomeric polymer material.

[0332] Preferably, the third polymer material comprises or is formed from one or more of the following materials: polyolefin, in particular polypropylene and / or polyethylene, polyester, in particular polyethylene terephthalate and / or polybutylene terephthalate, polyamide, polyimide, copolyamide, polyamide elastomer, polyether, in particular epoxy resins, polyurethane, polyurethane acrylate, polyvinyl chloride, polystyrene, polymethyl methacrylate, acrylonitrile butadiene styrene, synthetic rubber, in particular ethylene propylene diene monomer rubber, polycarbonate, polyethersulfone, polyoxymethylene, polyetheretherketone, polytetrafluoroethylene, silicone, in particular silicone rubber and / or silicone-based elastomer.

[0333] Thermoplastic polymer materials are preferably used for the third polymer material. For example, hot melt materials are used for the third polymer material.

[0334] It can be advantageous if the third polymer material comprises one or more fillers, wherein the one or more fillers are selected, for example, from: inorganic fillers, such as silicon oxide, carbonate, silicon carbide, metal oxide, nitride, in particular metal nitride.

[0335] As especially in Fig. 9 As can be seen, it can be provided that the first sealing element 134 is at least approximately rectangular in cross-section taken parallel to the main extension plane of the cover element 110.

[0336] It can be advantageous if the first sealing element 134 is arranged at a distance from the first opening 126a of the cover element 110, wherein the first sealing element 134 preferably has the same distance all around to an edge of the cover element 110 surrounding the opening.

[0337] Preferably, the electrochemical cell 100 comprises an insulating element 136, which serves in particular to insulate the interior 108 and / or to provide a more stable fixing of the first contact element 120 and the second contact element 124.

[0338] The insulating element 136 is preferably formed at least approximately in the shape of a plate and / or is fixed to the cover element 110 on an inner surface 132 facing the interior 108, in particular by means of a material connection and / or by means of a force connection and / or by means of a form connection.

[0339] The insulating element 136 preferably comprises a fifth polymer material or is formed from the fifth polymer material.

[0340] The fifth polymer material is preferably a thermoplastic polymer material, for example an injection-moldable and / or electrolyte-resistant thermoplastic polymer material.

[0341] Preferably, the insulating element 136 is an injection-molded element.

[0342] It may be provided that the insulating element 136 is manufactured separately, for example in an injection molding process, and then connected to the cover element 110.

[0343] Alternatively, it can be provided that the insulating element 136 is injection-molded onto the cover element 110.

[0344] It can be advantageous if the insulating element 136 has one or more, in this case four (see, for example, Fig. 9 ), comprising positioning projections 138. The one or more positioning projections 138 preferably extend along a direction from the interior 108 towards the cell terminals 118, 122 away from a base body of the insulating element 136.

[0345] The positioning projections 138 preferably engage in complementary positioning recesses 140 of the cover element 110.

[0346] For example, the positioning projections 138 engage behind the cover element 110 in a direction arranged parallel to a main extension plane of the cover element 110.

[0347] In the present case, the positioning projections 138 are designed in a pin-like form, for example as positioning pins.

[0348] Preferably, the displacement of the cover element 110 and the insulating element 136 is blocked by means of the positioning projections 138 engaging in the positioning recesses 140, parallel to a main extension plane of the cover element 110.

[0349] It may be provided that the insulating element 136 has a bulge and / or recess 165 facing the first connection area 130, in particular such that a part of the first potting element 128 is received between the cover element 110 and the insulating element 136.

[0350] For example, the first potting element 128 engages behind the cover element 110 in a direction parallel to a central axis 142 of the first contact element 120.

[0351] It can be advantageous if the electrochemical cell 100 has at least one predetermined breaking point 144 which tears and / or breaks when a critical internal temperature and / or a critical internal pressure is exceeded.

[0352] It may be provided that at least one predetermined breaking point 144 is designed as a material weak point in the cover element 110.

[0353] It can be advantageous if a predetermined breaking point 144 is located centrally between the first cell terminal 118 and the second cell terminal 122.

[0354] As especially in Fig. 10As can be seen, the insulating element 136 preferably has recesses 146 in the area of ​​the at least one predetermined breaking point 144, in particular regularly arranged ones (designated by way of example).

[0355] The recesses 146 are preferably bounded by, in particular cross-shaped, ribs. The rib structure can form a splash guard.

[0356] It can be advantageous if the insulating element 136 has several, in this case two, recesses 165 (in Fig. 10 (indicated by dashed lines), in the area where the insulating element 136 has a reduced thickness. The recesses 165 preferably serve to receive resin material and / or limit a volume formed by the respective connection area 130, 156 towards the interior 108 of the electrochemical cell 100.

[0357] Preferably the electrochemical cell 100 has an electrolyte filling opening 148 which extends through the cover element 110 and the insulating element 136 and / or serves to fill the interior 108 with electrolyte.

[0358] The second contact element 124 is fixed to the cover element 110 by means of a second potting element 150. The second potting element 150 preferably completely fills a second connection area 156.

[0359] Regarding the arrangement and / or design of the second casting element 150 and the second connection area 156, reference is made to the explanations in connection with the first casting element 128 and the first connection area 130.

[0360] The second potting element 150 is preferably formed from a second polymer material. Preferably, the second polymer material comprises a second resin material or is formed from one.

[0361] The second resin material, in a cured state, preferably has a glass transition temperature of approximately 90 °C or more, in particular approximately 95 °C or more, for example approximately 100 °C or more, compared to the second polymer material.

[0362] It can be advantageous if the second polymer material comprises or is formed from one or more of the following materials: epoxy resin material, phenolic resin material, aminoplast material, polyurethane material, silicone material, polyester resin material, ABS resin material.

[0363] Preferably, the second resin material, in a cured state, has a hardness of approximately 40 Shore D or more, in particular approximately 50 Shore D or more, for example approximately 60 Shore D or more, compared to the second polymer material.

[0364] Preferably, the hardness of the second resin material cured to form the second polymer material is approximately 100 Shore D or less, in particular approximately 97 Shore D or less, for example 95 Shore D or less.

[0365] The hardness is preferably determined according to DIN ISO 868.

[0366] It can be advantageous if the second resin material comprises one or more fillers. The fillers are selected, for example, from one or more of the following: inorganic fillers, in particular silicon oxide, carbonate, carbide, in particular silicon carbide, nitride, in particular metal nitride, metal oxide.

[0367] It can be advantageous if the second resin material comprises or is formed from an epoxy resin material.

[0368] Preferably, the second resin material comprises a one-component resin material, for example a one-component epoxy resin material, or is formed from one.

[0369] According to the first embodiment of an electrochemical cell 100, the first resin material and the second resin material are identical.

[0370] According to alternative embodiments, the first resin material and the second resin material are chemically and / or physically different resin materials.

[0371] It can be advantageous if the first resin material used in the production of the first potting element 128 and / or the second resin material used in the production of the second potting element 150 has a viscosity of approximately 10² < mPa·s or more, in particular approximately 10³ < mPa·s or more.

[0372] The viscosity of the first resin material and / or the second resin material in a manufacture of the electrochemical cell 100 is preferably approximately 10⁶ < mPa·s or less, in particular 10⁵ < mPa·s or less.

[0373] The filling of the first connection area 130 with the first resin material and / or the second connection area 156 with the second resin material preferably takes place at ambient pressure.

[0374] Preferably, the electrochemical cell 100 has a second sealing element 152, which in particular radially surrounds and / or limits the second potting element 150 with respect to a central axis 154 of the second contact element 124 on an outer side of the cover element 110 facing away from the interior 108.

[0375] The second connection area 156, in which the second potting element 150 is preferably arranged, is preferably limited and / or defined on a side of the cover element 110 facing away from the interior 108 by an underside of the second cell terminal 122 facing the interior 108, and by a side of the second sealing element 152 facing the second contact element 124.

[0376] On a side of the cover element 110 facing the interior 108, the second connection area 156 is preferably limited and / or defined by a recess 165 formed on a side of the insulating element 136 facing away from the interior 108, an inner surface 132 of the cover element 110 facing the interior 108 and an outer surface of the second contact element 124.

[0377] The second sealing element 152 preferably comprises or is formed from a fourth polymer material.

[0378] For example, the fourth polymer material is applied to the outside of the cover element 110 by means of an application element and is subsequently cured and / or dried.

[0379] For example, the second sealing element 152 is and / or is formed by a sealing bead.

[0380] It can be advantageous if the fourth polymer material comprises or is formed from a thermoplastic polymer material, a thermosetting polymer material and / or an elastomeric polymer material.

[0381] It can be advantageous if the fourth polymer material of the second sealing element 152 and the third polymer material of the first sealing element 134 are chemically and / or physically identical.

[0382] The material selection and / or design and / or arrangement of the second sealing element 152 corresponds in this case to the material selection and / or design and / or arrangement of the first sealing element 134, so reference is made to the relevant explanations.

[0383] The sealing elements 134, 152 preferably form contact surfaces for the cell terminals 118, 122.

[0384] As an alternative to forming the first sealing element 134 during its manufacture, it can be provided that the first sealing element 134 is a separate component, in particular a separately handleable component.

[0385] For example, the first sealing element 134 is an insert, for example a plastic frame.

[0386] Additionally or alternatively, it may be provided that the second sealing element 152 is a separate component, in particular a separately handleable component.

[0387] For example, the second sealing element 152 is an insert, for example a metal frame.

[0388] In the case of a separately manufactured first sealing element 134 and / or a separately manufactured second sealing element 152, it may be provided that these are inserted into a receiving space provided for this purpose in the cover element 110 and / or into a receiving space in the respective cell terminal 118, 122 (not shown).

[0389] It can be provided that the first sealing element 134 and the first cell terminal 118 are flush radially with respect to the central axis 142 of the first contact element 120.

[0390] In particular, the second sealing element 152 and the second cell terminal 122 close flush with each other radially with respect to the central axis 154 of the second contact element (see, for example, Fig. 1 ).

[0391] Alternatively, it can be provided that the first cell terminal 118, for example on a side facing a central area of ​​the cover element 110 arranged between the cell terminals 118, 122, extends beyond the first sealing element 134.

[0392] In particular, the second cell terminal 122 extends beyond the second sealing element 152, for example on a side facing the central area of ​​the cover element 110 arranged between the cell terminals 118, 122 (see, for example, Fig. 8 ).

[0393] It can be advantageous if the second contact element 124 has a cross-section that is at least approximately rectangular in shape, taken parallel to a main extension plane of the cover element 110.

[0394] It can be advantageous if the second cell terminal 122 has a through-opening 119, which in particular is at least approximately complementary to the cross-section of the second contact element 124 (cf. Fig. 73 ).

[0395] It can be advantageous if the second contact element 124 is and / or is passed through the passage opening 119 of the second cell terminal 122.

[0396] Preferably, an end region of the second contact element component 124b facing away from the interior 108 of the electrochemical cell 100 is connected by a material bond, in particular by welding, to an edge region of the second cell terminal 122 surrounding the passage opening 119.

[0397] Preferably the second contact element 124 is made of a flat material, for example in sheet metal form.

[0398] It may be provided that the second contact element 124 is bent and / or becomes an L-shape, wherein a principal extension plane of a leg of the L-shape facing away from the second cell terminal 122 has a principal extension plane which is preferably formed at least approximately parallel to a principal extension plane of the cover element 110.

[0399] As especially in Figs. 4 and 5 As shown, the second contact element 124 is preferably one piece.

[0400] Alternatively, it can be provided that the second contact element 124 has a first contact element component 124a and a second contact element component 124b, which are connected to each other in accordance with the first contact element component 120a and the second contact element component 120b.

[0401] Reference is made here to the corresponding description. In contrast to the first contact element 120, the contact conductor components 124a, 124b of the second contact element 124 are preferably made of the same metallic material or comprise the same metallic material, for example aluminum.

[0402] For example, the second connecting conductor 116 is connected on an underside facing the interior 108 to a leg of the second contact element 124 facing the interior 108 by means of a material connection, in particular by welding.

[0403] It can be advantageous if the second contact element 124, for example in the second connection area 156, has at least one locking element 158. The at least one locking element 158 ​​is preferably a region of the second contact element 124 in which it has a locally reduced cross-sectional area. The cross-sectional area is preferably defined at least approximately parallel to a principal extension plane of the cover element 110.

[0404] Preferably, the cross-sectional area of ​​the second contact element 124 in the area of ​​the at least one locking element 158 ​​is approximately 20% or more, in particular approximately 30% or more, in particular approximately 50% or more, smaller than an average cross-sectional area of ​​the second contact element 124 in adjacent areas.

[0405] The at least one locking element 158 ​​is preferably arranged in a leg of the second contact element 124 facing away from the interior 108. For example, the at least one locking element 158 ​​is a fuse.

[0406] The at least one fuse element 158 ​​preferably serves as overcurrent protection, which melts particularly when a critical current is exceeded. The melting of the at least one fuse element 158 ​​preferably electrically isolates the second cell terminal 122 from the electrochemical element 106.

[0407] Preferably, the second contact element 124 comprises the first metallic material, for example aluminium, or is formed from it.

[0408] To manufacture the electrochemical cell 100, the cover element 110 is preferably positioned on the insulating element 136, in particular such that the positioning projections 138 and the positioning recesses 140 interlock.

[0409] Subsequently, preferably the first contact element 120 is passed through the first opening 126a of the cover element 110 and a first opening 127a of the insulating element 136.

[0410] The first opening 127a of the insulating element 136 is, for example, at least one anode opening.

[0411] Alternatively, it can be provided that the first opening 127a of the insulating element 136 is at least a cathode opening (not shown).

[0412] The second contact element 124 is preferably passed through a second opening 126b of the cover element 110 and a second opening 127b of the insulating element 136.

[0413] The second opening 126b of the cover element 110 is, for example, at least a cathode opening.

[0414] Alternatively, the second opening 126b of the cover element 110 may be provided to be at least one anode opening (not shown).

[0415] The second opening 127b of the insulating element 136 is, for example, at least a cathode opening.

[0416] Alternatively, the second opening 127b of the insulating element 136 may be provided to be at least one anode opening (not shown).

[0417] It can be advantageous if the first contact element 120 and / or the second contact element 124 are fixed relative to the cover element 110 and / or the insulating element 136 by means of a retaining element, for example by means of a hold-down device.

[0418] Then, preferably, the first resin material is poured into the first connection area 130 from above and / or the first connection area 130 is filled with the first resin material, in particular completely.

[0419] In particular, the second resin material is poured into the second connection area 156 from above and / or the second connection area 156 is filled with the second resin material, in particular completely.

[0420] After filling and / or incorporating the material, the first cell terminal 118 is preferably connected to an edge region of the first contact element 120 facing away from the interior 108 by means of a material bond, in particular by means of laser welding.

[0421] Preferably, after filling and / or inserting, the second cell terminal 122 is connected to an edge region of the second contact element 124 facing away from the interior 108 by means of a material-bonded connection, in particular by means of laser welding.

[0422] For securing the cell terminals 118, 122, retaining elements in the form of hold-down devices are preferably used.

[0423] The assembly, especially without the retaining element, is then hardened. Hardening is carried out, for example, in a hardening line.

[0424] Optimized properties are preferably formed when the first connection area 130 and / or the second connection area 156 has the following characteristics (see Fig. 7 ): a distance a between the cover element 110 and the first cell terminal 118 in a direction parallel to the central axis 142 and / or a distance a between the cover element 110 and the second cell terminal 122 in a direction parallel to the central axis 154 is 0.05 mm or more; and / or a distance b between the first contact element 120 and the cover element 110 in the region of the first opening 126a of the cover element 110 and / or a distance b between the second contact element 124 and the cover element 110 in the region of the second opening 126b of the cover element 110 is 0.05 mm or more; and / or a ratio between the distance a and a thickness of the cover element 110 is in the range of approximately 0.005 and 1.

[0425] In Fig. 11An insulating element 136 of a further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, is shown. The insulating element 136 is designed in two parts and comprises a first insulating element component 136a and a second insulating element component 136b.

[0426] It can be advantageous if the first insulating element component 136a and the second insulating element component 136b are designed to be mirror-symmetrical with respect to a plane of symmetry which is arranged at least approximately perpendicular to a principal extension plane of the insulating element 136.

[0427] It can be advantageous if the insulating element 136 has several electrolyte filling openings 148. For example, two electrolyte filling openings 148 are arranged in a respective central area of ​​the respective insulating element component 136a, 136b.

[0428] The two insulating element components 136a, 136b are preferably connected to each other by material bonding and / or form bonding and / or force bonding.

[0429] It may be provided that the first insulating element component 136a and the second insulating element component 136b are each connected to the cover element 110 by a material bond and / or a force bond.

[0430] Furthermore, the further embodiment of an electrochemical cell 100 corresponds to that described in the Figs. 1 to 10 The first embodiment shown is identical in terms of structure and function, so reference is made to its description in this respect.

[0431] In Fig. 12 An insulating element 136 of a further embodiment of an electrochemical cell 100, which is not shown in its entirety in the drawing, is shown.

[0432] The in Fig. 12The insulating element 136 shown has a compensating element 160 in the middle between the first opening 127a and the second opening 127b.

[0433] The compensating element 160 preferably serves to compensate for mechanical stresses, which arise in particular due to exceeding a critical pressure in the interior 108 of the electrochemical cell 100 and / or a critical temperature in the interior 108 of the electrochemical cell 100.

[0434] Preferably, the compensating element 160 is materially bonded to the first insulating element component 136a arranged laterally to it and / or to the second insulating element component 136b arranged laterally to it.

[0435] It can be advantageous if the insulating element 136 has several, for example two, electrolyte filling openings 148, which are preferably located according to the electrolyte filling openings 148 in the Fig. 11 are arranged in the insulating element 136 shown.

[0436] Furthermore, the further embodiment of an electrochemical cell 100, which is not shown in its entirety in the drawing, corresponds essentially to the one described in the following with regard to structure and function. Figs. 1 to 10 the first embodiment shown is the same, so reference is made to its description in this respect.

[0437] In the Figs. 13 to 15 Figure 1 shows a section of another embodiment of an electrochemical cell 100 which is not shown in its entirety in the drawing.

[0438] According to this embodiment, the first contact element 120 and / or the second contact element 124 preferably have an at least approximately elliptical and / or oval cross-section.

[0439] The cross-section is preferably taken parallel to a main extension plane of the cover element 110.

[0440] As especially in the Fig. 75As shown, the first cell terminal 118 and / or the second cell terminal 122 according to this further embodiment preferably have an at least approximately elliptical and / or oval passage opening 119.

[0441] As especially in Fig. 15 As can be seen, the insulating element 136 is preferably designed in two parts. Alternatively, the insulating element 136 can be designed as a single piece and / or have a compensating element 160.

[0442] The second electrolyte filling port 148 is optional.

[0443] Furthermore, the further embodiment of an electrochemical cell 100, which is not shown in its entirety in the drawing, corresponds essentially to the one described in the following with regard to structure and function. Figs. 1 to 10 the first embodiment shown is the same, so reference is made to its description in this respect.

[0444] In the Fig. 16 and 17The figure shows a section of a further embodiment of an electrochemical cell 100 which is not shown in its entirety in the drawing.

[0445] This further embodiment differs essentially in terms of structure and function from the one described in the Figs. 1 to 10 In the first embodiment shown, the first contact element 120 and / or the second contact element 124 have a principal extension direction in a cross-section taken perpendicular to a principal extension plane of the cover element 110, which is arranged at least approximately parallel to a main side of the electrochemical cell 100.

[0446] Accordingly, the main extension directions of the first opening 126a and / or the second opening 126b of the cover element 110 are arranged, in particular, at least approximately parallel to the main side of the electrochemical cell 100.

[0447] In Fig. 16is a state after a determination of the first cell terminal 120 and the second cell terminal 122.

[0448] In the Fig. 17 In the depicted state, the first contact element 120 and the second contact element 124 have not yet passed through the first opening 126a and the second opening 126b of the cover element 110, respectively. The first cell terminal 118 and the second cell terminal 122 are also not present in the depicted state. Fig. 17 The depicted state is not yet assembled.

[0449] As especially in Fig. 74 As shown, a passage opening 119 formed in the first cell terminal 118 and / or in the second cell terminal 122 preferably has a main extension direction which is arranged at least approximately parallel to a main side of the electrochemical cell 100.

[0450] Moreover, the one in the Fig. 16 and 17A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, is essentially identical in structure and function to that described in the Figs. 1 to 10 the first embodiment shown is the same, so reference is made to its description in this respect.

[0451] One in Fig. 18 A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, differs essentially in its structure and function from that shown in the Figs. 1 to 10 In the first embodiment shown, the locking element 158 ​​is arranged outside the second connection area 156.

[0452] This is preferably intended to prevent leakage when the safety element 158 ​​is triggered.

[0453] The locking element 158 ​​is in particular encased in an electrolyte-resistant thermoplastic polymer material. Polyethylene, polyethylene terephthalate, polypropylene and / or polybutylene terephthalate are preferably suitable as electrolyte-resistant thermoplastic polymer materials.

[0454] It can be advantageous if the safety element 158, for example in the form of a fuse, is arranged adjacent to an end of the second contact element 124 facing away from the second cell terminal 122.

[0455] Moreover, the one in the Fig. 18 A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, is essentially identical in structure and function to that described in the Figs. 1 to 10 the first embodiment shown is the same, so reference is made to its description in this respect.

[0456] One in Fig. 19A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, differs essentially in its structure and function from that shown in the Figs. 1 to 10 In the first embodiment shown, the second contact element 124 does not have a locking element 158.

[0457] It can be advantageous if the safety element 158 ​​forms part of the second connecting conductor 116 (not shown).

[0458] Moreover, the in Fig. 19 A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, is essentially identical in structure and function to that described in the Figs. 1 to 10 the first embodiment shown is the same, so reference is made to its description in this respect.

[0459] One in Fig. 20A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, differs essentially in its structure and function from that shown in the Figs. 1 to 10 the first embodiment of an electrochemical cell 100 shown, that the first potting element 128 does not engage the cover element 110 radially with respect to the central axis 142 of the first contact element 120 on an inner surface 132 of the cover element 110 facing the interior 108; and / or the second potting element 150 does not engage the cover element 110 radially with respect to the central axis 154 of the second contact element 124 on an inner surface 132 of the cover element 110 facing the interior 108.

[0460] It can be advantageous if the first potting element 128 and the second potting element 150 have at least approximately the same shape.

[0461] It can be advantageous if the dimensions of a first recess 165 of the insulating element 136 correspond at least approximately to the dimensions of the first opening 126a of the cover element 110.

[0462] Preferably, the dimensions of a second recess 165 of the insulating element 136 correspond at least approximately to the dimensions of the second opening 126b of the cover element 110.

[0463] Preferably, with the exception of the first opening 126a and / or the second opening 126b, a continuous direct material contact is formed between the insulating element 136 and the covering element 110.

[0464] Moreover, the in Fig. 20 A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, is essentially identical in structure and function to that described in the Figs. 1 to 10 the first embodiment shown is the same, so reference is made to its description in this respect.

[0465] One in Figs. 21 to 23 A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, differs essentially in terms of structure and function from the one shown in the Figs. 1 to 10 In the first embodiment shown, the electrochemical cell 100 comprises a snap-action element 162 which is located in a Fig. 21 The depicted normal operating state of the electrochemical cell 100 is in a resting state.

[0466] In Fig. 21 For clarity, the first cell terminal 118 is shown larger than the second cell terminal 122. Preferably, the first cell terminal 118 and the second cell terminal 122 have essentially the same dimensions.

[0467] In the rest state, the snap-on element 162 preferably extends in the direction of the insulating element 136.

[0468] It can be advantageous if the snap-on element 162 enters a working state in which the snap-on element 162 protrudes into an external space of the housing 104, if the pressure in the interior 108 of the electrochemical cell 100 exceeds a threshold pressure value (critical pressure) and / or if the temperature in the interior 108 of the housing 104 exceeds a threshold temperature value (critical temperature).

[0469] The snap-on element 162 is preferably arranged in a region of the cover element 110 which is arranged below the first cell terminal 118 in a direction perpendicular to the main extension plane of the cover element 110.

[0470] In the Fig. 21 In the normal operating state of the electrochemical cell 100 shown, the snap-action element 162 is preferably arranged at a distance from the first cell terminal 118.

[0471] In an overcharge state of the electrochemical cell 100 (not shown in the drawing), the short circuit between the first cell terminal 118 on the one hand and the housing 104 and the second contact element 124 on the other hand is created by an increase in pressure in the interior 108 of the electrochemical cell 100 during overcharging, causing the snap-action element 162 to switch from the position shown in the drawing. Fig. 21 The depicted resting state is transformed into the working state not shown in the drawing.

[0472] In the operating state of the snap-action element 162, the snap-action element 162 presses against the first cell terminal 118, so that the first cell terminal 118 comes into electrically conductive contact with the cover element 110, which triggers a short circuit between the first cell terminal 118 and the housing 104.

[0473] In embodiments in which a snap-on element 162 is provided, it may be advantageous if the fourth polymer material of the second sealing element 152 comprises one or more conductive additives.

[0474] Suitable conductive additives are preferably one or more of the following: carbon materials, in particular conductive carbon black, graphite, graphene, carbon nanotubes, carbon fibers and / or carbon nanobulbs, particulate metallic materials, in particular metal powders, electrically conductive ceramic materials, in particular nitrides and / or carbides, electrically conductive polymers, in particular trans-polyacetylene, polypyrrole, polyaniline, poly(-phenylene), polythiophene and / or polystyrene-doped poly-(3,4-ethylenedioxythiophene) (PEDOT:PSS).

[0475] Preferred particulate metallic materials preferably include aluminium, copper, titanium, iron, silver and / or alloys of the aforementioned materials or are formed therefrom.

[0476] Due to one or more conductive additives, the second sealing element 152 preferably has sufficient electrical conductivity to electrically connect the second contact element 124 to the cover element 110.

[0477] When the snap-action element 162 transitions from the rest state to the working state, and thus the first cell terminal 118 is electrically contacted with the cover element 110, the locking element 158 ​​is activated in particular.

[0478] Preferably, the safety element 158 ​​melts, thereby electrically isolating the second cell terminal 122 from the electrochemical element 106. This prevents further overcharging of the electrochemical cell 100.

[0479] As in Fig. 22As can be seen, the cover element 110 preferably has an opening, for example at least approximately round, in which the snap-on element 162 is inserted, for example by welding or gluing.

[0480] The insulating element 136 preferably has several recesses in the area of ​​the snap-on element 162, which are in particular arranged regularly. For example, the several recesses are separated and / or limited from one another by grid-like ribs (see figure). Fig. 23 ).

[0481] The ribs and / or the recesses preferably form a splash guard which can reduce or prevent excessive leakage of electrolyte from the interior 108 of the electrochemical cell 100.

[0482] Moreover, the one in the Figs. 21 to 23 The further embodiment of an electrochemical cell 100 shown is essentially the same in terms of structure and function as that described in the Figs. 1 to 10 the first embodiment shown is the same, so reference is made to its description in this respect.

[0483] One in the Figs. 24 to 28 A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, differs essentially in terms of structure and function from the one shown in the Figs. 1 to 10 In the illustrated first embodiment, the first contact element 120 has an at least approximately T-shaped cross-section and / or the second contact element 124 has an at least approximately T-shaped cross-section. The cross-section is preferably parallel to a main face of the electrochemical cell 100.

[0484] It can be advantageous if the first contact element 120 has a first contact element component 120a which comprises or is formed from a first metallic material, for example aluminum.

[0485] The first contact element component 120a is, as described in connection with the first embodiment of an electrochemical cell 100, materially bonded to the first cell terminal 118 on the one hand and to a second contact element component 120b on the other.

[0486] In the present case, both the first contact element component 120a and the second contact element component 120b are at least approximately cuboid in shape.

[0487] It can be advantageous if the first contact element 120 has a third contact element component 120c, which is fixed to the second contact element component 120b, in particular on a side of the second contact element component 120b facing away from the first contact element component 120a.

[0488] For example, the second contact element component 120b is received centrally in an opening of the third contact element component 120c. Preferably, the second contact element component 120b and the third contact element component 120c of the first contact element 120 are joined to each other by a material bond, for example by laser welding and / or roll cladding.

[0489] As an alternative to the variant shown, it can be provided that oval-shaped pins are punched out of a contact element component in a cross-section and then welded into a metallic sheet.

[0490] The second contact element component 120b and / or the third contact element component 120c of the first contact element 120 preferably comprise a second metallic material, for example copper, or are formed therefrom.

[0491] The second metallic material is preferably a metallic material different from the first metallic material.

[0492] It may be provided that the third contact element component 120c is at least approximately cuboid in shape and / or designed as a sheet metal part.

[0493] Preferably, the third contact element component 120c has an at least approximately rectangular recess through which the second contact element component 120b is passed and / or is passed (see Figure 1). Figs. 25 and 26 ).

[0494] In particular, the edges of the recesses of the third contact element component 120c and an edge area of ​​the second contact element component 120b facing away from the first contact element component 120a are joined together by means of a material bond, for example by welding.

[0495] It can be advantageous if the second contact element 124 is made of several parts.

[0496] Preferably, the second contact element 124 comprises a first contact element component 124a, which is fixed on one side to the second cell terminal 122 and on the other side to a second contact element component 124b of the second contact element 124, for example by welding.

[0497] It can be advantageous if a main extension plane of the first contact element component 124a is arranged perpendicular to a main extension plane of the second contact element component 124b.

[0498] Preferably, the second contact element component 124b has an at least approximately rectangular recess by which the first contact element component 124a is fixed on a side of the first contact element component 124a facing away from the first cell terminal 122 (see Figure 1). Figs. 27 and 28 ).

[0499] Additionally, it may be provided that the second contact element 124 has a third contact element component not shown in the drawing, which is fixed, for example, to the second contact element component 124b (as described in connection with the first contact element 120).

[0500] Preferably, the first contact element component 124a, the second contact element component 124b and the third contact element component comprise the same metallic material, for example aluminium, or are formed from it.

[0501] The cross-section of the second contact element 124 is preferably rectangular. The cross-section is preferably at least approximately parallel to a principal plane of extension of the cover element 110.

[0502] Moreover, the one in the Figs. 24 to 28 further embodiment of an electrochemical cell 100 shown with regard to structure and function with that described in the Figs. 1 to 10the embodiment shown is the same, so reference is made to its description in this respect.

[0503] One in the Figs. 29 to 32 A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, differs essentially in its structure and function from that shown in the Figs. 24 to 28 In the illustrated embodiment, a cross-section of the first contact element component 120a of the first contact element 120 and / or a cross-section of the first contact element component 124a of the second contact element 124 is at least approximately elliptical and / or oval.

[0504] The cross-section is preferably taken parallel to a main extension plane of the cover element 110.

[0505] Moreover, the one in the Figs. 29 to 32 The further embodiment of an electrochemical cell 100 shown is essentially the same in terms of structure and function as that described in the Figs. 29 to 32the embodiment shown is the same, so reference is made to its description in this respect.

[0506] One of the Figs. 33 to 35 A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, differs essentially in terms of structure and function from the one shown in the Figs. 1 to 10 In the first embodiment shown, the first sealing element 134 and / or the second sealing element 152 form a component of the cover element 110.

[0507] Preferably, a first projection, in particular one closed into a ring shape, extends along a direction from the interior 108 to the first cell terminal 118 away from a base body of the cover element 110. The projection preferably forms the first sealing element 134 and surrounds the first potting element 128 radially with respect to a central axis 142 of the first contact element 120.

[0508] In particular, a second elevation, especially one closed in a ring shape, extends along a direction from the interior 108 to the second cell terminal 122 away from a base body of the cover element 110.

[0509] As an alternative to a closed ring shape, the first sealing element 134 and / or the second sealing element 152 may have at least one interruption (not shown).

[0510] The raised section forms the second sealing element 152 and surrounds the second potting element 150 radially with respect to a central axis 154 of the second contact element 124.

[0511] It may be provided that the first sealing element 134 and / or the second sealing element 152 are and / or will be embossed into the cover element 110.

[0512] For example, the first sealing element 134 and / or the second sealing element 152 are designed in the form of embossings.

[0513] It may be provided that the second sealing element 152 is partly formed in the form of a sealing bead made of the fourth polymer material and partly in the form of an embossing and / or bead (not shown).

[0514] A bead-sealing bead hybrid sealing element can be designed and / or constructed in this way. According to this embodiment, the fourth polymer material is preferably electrically insulating. An electrically conductive contact surface thus exists only in areas of the bead, and the overall electrically conductive contact surface between the housing 104 and the second cell terminal 122 is minimized. Current can be more effectively limited in the event of a fault.

[0515] Additionally or alternatively, the first sealing element 134 can also comprise one or more beads and one or more sealing beads in certain areas, or be formed from them.

[0516] Fig. 34The cover element 110 is shown before assembly in the electrochemical cell 100.

[0517] It may be provided that the first sealing element 134 is made of the same material as the cover element 110. In particular, the first sealing element 134 is formed integrally with the base body of the cover element 110.

[0518] It can be advantageous if the second sealing element 152 is made of the same material as the cover element 110. In particular, the second sealing element 152 is formed integrally with the base body of the cover element 110.

[0519] It can be advantageous if, by introducing, for example by embossing, the first sealing element 134 and / or the second sealing element 152 onto an inner surface 132 of the cover element 110 facing the interior 108 of the housing 104, a recess and / or indentation is formed, which is in particular complementary to the elevation forming the respective sealing element 134, 152.

[0520] These setbacks and / or indentations preferably form positioning setbacks 140. As particularly in Fig. 35 As shown, the insulating element 136 preferably has complementary positioning projections 138.

[0521] In particular, a first positioning projection 138 is arranged in a ring shape around the first opening 127a, for example by a groove.

[0522] Preferably, a second positioning projection 138 is arranged in a ring shape around the second opening 127b of the insulating element, for example by means of a groove.

[0523] The first positioning projection 138 and / or the second positioning projection 138, for example, have a cross-section that is at least approximately rectangular. The cross-section is preferably parallel to a principal extension plane of the insulating element 136.

[0524] Further positioning projections 138 and complementary positioning recesses 140 are preferably unnecessary.

[0525] The cover element 110 can be positioned relative to the insulating element 136 via the ring-shaped closed positioning projections 138 of the insulating element 136 and the complementary positioning recesses 140 of the cover element 110.

[0526] For filling and / or curing the first and second resin materials, the cover element 110 and the insulating element 136 are fixed relative to each other, for example, by means of a holding element. This prevents the first and / or second resin materials from running before they have fully cured.

[0527] A hold-down device is preferably used as the holding element.

[0528] Moreover, this agrees with the Figs. 33 to 35 further embodiment of an electrochemical cell 100 shown with regard to structure and function with that described in the Figs. 1 to 10 the first embodiment shown is the same, so reference is made to its description in this respect.

[0529] One in Fig. 36 A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, differs essentially in its structure and function from that shown in the Figs. 33 to 35In the illustrated embodiment, the first contact element 120 and / or the second contact element 124 are and / or are inserted into the insulating element 136.

[0530] For example, the first contact element 120 forms an insert.

[0531] In particular, the second contact element 124 forms an insert.

[0532] For example, a positive locking connection is formed between the insulating element 136 and the first contact element 120, in particular in a direction arranged parallel to the central axis 142 of the first contact element 120.

[0533] Preferably, a positive locking connection is formed between the insulating element 136 and the second contact element 124, in particular in a direction arranged parallel to the central axis 154 of the second contact element 124.

[0534] A seal between the first contact element 124 and the insulating element 136 and / or the second contact element 124 and the insulating element 136 is formed in particular by the self-weight of the respective components.

[0535] The insulating element 136 is in particular injection molded onto the first contact element 120 and / or the second contact element 124.

[0536] Moreover, the in Fig. 36 The further embodiment of an electrochemical cell shown is essentially the same in terms of structure and function as that described in the Figs. 33 to 35 the embodiment shown is the same, so reference is made to its description in this respect.

[0537] One in Fig. 37 A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, differs essentially in its structure and function from that shown in the Figs. 1 to 10In the first embodiment shown, the first resin material and / or the second resin material are filled in after connecting the first cell terminal 118 with the first connecting element 120 and / or after connecting the second cell terminal 122 with the second contact element 124.

[0538] In particular, the insulating element 136 has a first filling opening 164 in the area of ​​the first connection area 130, through which the first resin material in a flowable state is filled into the first connection area 130.

[0539] It can be advantageous if the insulating element 136 has a second filling opening 164 in the area of ​​the second connection area 156, through which the second resin material is filled into the second connection area 156 in a flowable state.

[0540] In particular, to optimize filling, it may be provided that the first sealing element 134 and / or the second sealing element 152 do not form a closed ring shape, but in particular have one or more interruptions 166 (cf. Fig. 61 ).

[0541] The one or more interruptions 166 form, for example, ventilation openings.

[0542] To manufacture the electrochemical cell 100, the cover element 110 is preferably positioned on the insulating element 136 by means of the positioning projections 138 and positioning recesses 140.

[0543] The first opening 126a of the cover element 110 and the first opening 127a of the insulating element 136 are preferably arranged such that they are congruent.

[0544] Preferably, the second opening 126b of the cover element 110 and the second opening 127b of the insulating element 136 are arranged such that they are congruent.

[0545] Then, preferably, the first contact element 120 is passed through the first openings 126a, 127a and / or the second contact element 124 is passed through the second openings 126b, 127b.

[0546] Meanwhile or subsequently, for example, the first cell terminal 118 is positioned on the first contact element 120. In particular, the second cell terminal 122 is positioned on the second contact element 124.

[0547] For example, the cell terminals 118, 122 and respective contact elements 120, 124 are held together by means of one or more retaining elements, for example hold-down devices, while they are joined together by means of material bonding, for example by means of laser welding.

[0548] Then one or more of the retaining elements can be removed.

[0549] It can be advantageous to harden the existing component before filling the connection areas 130, 156, for example in a hardening line.

[0550] The first resin material is then preferably poured into the first connection area 130, for example through the first filling opening 164.

[0551] In particular, the second resin material is then or during this process, for example through the second filling opening 164 into the second connection area 156.

[0552] Subsequently, the first resin material and / or the second resin material is preferably converted to the first polymer material or the second polymer material by drying.

[0553] This process creates the first potting element 128 and the second potting element 150.

[0554] Moreover, the in Fig. 37The further embodiment of an electrochemical cell 100 shown is essentially the same in terms of structure and function as that described in the Figs. 1 to 10 the first embodiment shown is the same, so reference is made to its description in this respect.

[0555] One Fig. 38 A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, differs essentially in terms of structure and function from the one shown in Fig. 37 In the illustrated embodiment, the second sealing element 152 is as described in connection with the one described in the Figs. 33 to 35 The embodiment described is designed as a component of the cover element 110.

[0556] For example, the cover element 110 rests on a positioning projection 138 of the insulating element 136 in the area of ​​the second connection area 156, for example formed by a groove.

[0557] It can be provided that the second cell terminal 122 is in direct material contact with the second sealing element 152, which is designed as a projection of the cover element 110. This can minimize corrosion.

[0558] It can be advantageous to form an electrically insulating coating, in particular an oxide layer, for example an aluminum oxide layer, between the second cell terminal 122 and the second sealing element 152. This creates an electrical resistance between the housing 104 and the second cell terminal 122. This, in particular, limits the current flow and increases the safety of the electrochemical cell 100.

[0559] It may be provided that the contact surfaces of the second cell terminal 122 and / or the second sealing element 152 undergo a surface treatment. For example, the contact surfaces are anodized and / or their surface roughness is increased, for example by sandblasting.

[0560] This allows, on the one hand, the electrical resistance of the contact surfaces to be increased and, on the other hand, direct material contact between the contact surfaces to be interrupted, at least at specific points.

[0561] Moreover, the in Fig. 38 The further embodiment of an electrochemical cell 100 shown is essentially the same in terms of structure and function as that shown in Fig. 37 the embodiment shown is the same, so reference is made to its description in this respect.

[0562] One in Fig. 39A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, differs essentially in terms of structure and function from the one shown in Fig. 37 In the illustrated embodiment, the second contact element 124 is electrically conductive and / or materially connected to the cover element 108.

[0563] The locking element 158 ​​is preferably arranged on a side of the cover element 108 facing the interior 108 of the housing 104.

[0564] For example, housing 104 is brought to the potential of the second cell terminal 122.

[0565] The filling of the first resin material and / or the second resin material preferably takes place in the welded state of the cell terminals 118, 122 with the contact elements 120, 124.

[0566] Moreover, the in Fig. 39The illustrated embodiment of an electrochemical cell 100 is essentially the same in terms of structure and function as that shown in Fig. 37 the embodiment shown is the same, so reference is made to its description in this respect.

[0567] One in the Figs. 40 to 44 The further embodiment of an electrochemical cell 100 shown differs essentially in terms of structure and function from the one described in the Figs. 1 to 10 In the first embodiment shown, the first contact element 120 and / or the second contact element 124 are laterally connected to the first connecting conductor 114 and the second connecting conductor 116, respectively.

[0568] The connecting conductors 114, 116 are also connected laterally to the electrochemical element 106.

[0569] Moreover, the one in the Figs. 40 to 44 The embodiment shown, with regard to structure and function, is essentially the same as that described in the Figs. 1 to 10the first embodiment shown is the same, so reference is made to its description in this respect.

[0570] One in Fig. 45 A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, differs essentially in terms of structure and function from the one shown in the Figs. 40 to 44 In the illustrated embodiment, the electrochemical cell 100 does not include an insulating element 136.

[0571] In particular, the first potting element 128 and / or the second potting element 150 do not undercut the cover element 110 on a side facing the interior 108 of the housing 104.

[0572] The filling of the first connection area 130 with the first resin material and / or the filling of the second connection area 156 with the second resin material is preferably carried out from a side facing the interior 108 in the assembled state.

[0573] Moreover, the in Fig. 45 The further embodiment of an electrochemical cell shown is essentially the same in terms of structure and function as that described in the Figs. 40 to 44 the embodiment shown is the same, so reference is made to its description in this respect.

[0574] One in Fig. 46 A further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, differs essentially in its structure and function from that shown in the Figs. 40 to 44 In the illustrated embodiment, the insulating element 136 has a first filling opening 164 in the area of ​​the first connection area 130 and / or a second filling opening 164 in the area of ​​the second connection area 156.

[0575] The filling openings 164 preferably serve to fill the first resin material into the first connection area 130 and / or to fill the second resin material into the second connection area 156.

[0576] It can be advantageous if the first contact element 120 in an area facing the interior 108 below the cover element 110 has a cross-sectional area reduced by approximately 10% or more, for example by approximately 30% or more, compared to the rest of the first contact element 120.

[0577] It may be provided that the second contact element 124 has a cross-sectional area reduced by approximately 10% or more, for example by approximately 30% or more, in an area facing the interior 108 below the cover element 110, compared to the rest of the second contact element 124.

[0578] Moreover, the in Fig. 46The further embodiment of an electrochemical cell 100 shown is essentially the same in terms of structure and function as that described in the Figs. 40 to 44 the embodiment shown is the same, so reference is made to its description in this respect.

[0579] One in the Figs. 47 to 51 A further embodiment of an electrochemical cell, not shown in its entirety in the drawing, differs essentially in its structure and function from the one shown in Fig. 46 In the illustrated embodiment, the first contact element 120 and / or the second contact element 124 have a substantially stepped cross-section. The cross-section is preferably parallel to a main face of the electrochemical cell 100.

[0580] It can be advantageous if the first contact element 120 is bent and / or becomes bent in such a way that it has an area which is arranged at least approximately parallel to a principal extension plane of the cover element 110.

[0581] In particular, the first contact element 120 has a further area facing away from the first cell terminal 118, the main extension plane of which is arranged at least approximately perpendicular to the main extension plane of the cover element 110.

[0582] Preferably, the second contact element 124 is bent such that it has a region which is arranged at least approximately parallel to a principal extension plane of the cover element 110.

[0583] It can be advantageous if the second contact element 124 has a further area facing away from the second cell terminal 122, the main extension plane of which is arranged at least approximately perpendicular to the main extension plane of the cover element 110.

[0584] It can be advantageous if the first contact element 120 and the insulating element 136 form a force-fit and / or form-fit connection.

[0585] In particular, the second contact element 124 and the insulating element 136 form a force-fit and / or form-fit connection.

[0586] A holding element is preferably unnecessary in the manufacture of the electrochemical cell 100.

[0587] A cross-sectional area of ​​the first contact element 120 and / or a cross-sectional area of ​​the second contact element 124 is preferably constant over their entire extent.

[0588] Moreover, the one in the Figs. 47 to 51The further embodiment of an electrochemical cell shown is essentially the same in terms of structure and function as the one shown in Fig. 46 the embodiment shown is the same, so reference is made to its description in this respect.

[0589] In Fig. 52 and 53 An insulating element 136 of a further embodiment of an electrochemical cell 100, which is not shown in its entirety in the drawing, is shown.

[0590] The further embodiment of an electrochemical cell 100 differs essentially in terms of structure and function from that described in the Figs. 1 to 10 In the first embodiment shown, the insulating element 136 has several flow-guiding elements 168.

[0591] It can be advantageous if a flow guide element 168 is arranged in a recess 165 of the insulating element 136 located in the area of ​​the first connection area 130.

[0592] A further flow guide element 168 is preferably arranged in a recess 165 of the insulating element 136 located in the area of ​​the second connection area 156.

[0593] It can be advantageous if the flow-guiding elements 168 have an at least approximately V-shaped cross-section. The cross-section is preferably parallel to a principal plane of extension of the insulating element 136.

[0594] The flow guide elements 168 preferably serve to control the distribution of the first resin material and / or the second resin material.

[0595] Preferably, the flow guide elements 168 are arranged between the respective opening 127a, 127b and a side side of the electrochemical cell 100.

[0596] The tips of the V-shapes point outwards, in particular away from the respective openings 127a, 127b.

[0597] It can be advantageous if the recesses 165 of the insulating element 136 serve as receptacles and / or pockets for the first resin material or the second resin material.

[0598] Positioning projections 138 are preferably arranged on mutually facing sides of the recesses 165.

[0599] On a side side of the electrochemical cell 100 facing the respective recess 165, a filling opening 164 for filling the first resin material or the second resin material is preferably arranged.

[0600] The in Fig. 52 and 53 The insulating element 136 shown can alternatively be used in any of the described embodiments of an electrochemical cell 100.

[0601] Moreover, the in Fig. 52 and 53 further embodiment of an electrochemical cell 100 shown with regard to structure and function with that described in the Figs. 1 to 10the first embodiment shown is the same, so reference is made to its description in this respect.

[0602] In Fig. 54 An insulating element 136 of a further embodiment of an electrochemical cell 100, which is not shown in its entirety in the drawing, is shown.

[0603] The further embodiment of an electrochemical cell 100 differs essentially in terms of structure and function from the one described in Fig. 52 and 53 In the illustrated embodiment, two flow guide elements 168 are arranged in each recess of the insulating element 136, which are arranged at an angle to each other and / or spaced apart from each other.

[0604] The two flow-guiding elements 168 preferably form an obtuse angle with each other.

[0605] The insulating element 136 according to Fig. 54 can be used in any of the described embodiments of an electrochemical cell 100.

[0606] Moreover, the in Fig. 54 The further embodiment of an electrochemical cell 100 shown is essentially the same in terms of structure and function as that described in the Fig. 52 and 53 the embodiment shown is the same, so reference is made to its description in this respect.

[0607] In Fig. 55 An insulating element 136 of a further embodiment of an electrochemical cell 100, which is not shown in its entirety in the drawing, is shown.

[0608] The further embodiment of an electrochemical cell 100 differs essentially in terms of structure and function from that described in the Fig. 52 and 53 In the illustrated embodiment, no separate flow guide elements 168 are provided, but the positioning projections 138 form flow guide elements 168.

[0609] Two flow guide elements are preferably arranged on both sides of the first opening 127a and the second opening 127b of the insulating element 136.

[0610] The insulating element 136 according to Fig. 55 can be used in any of the described embodiments of an electrochemical cell 100.

[0611] Moreover, the in Fig. 55 The further embodiment of an electrochemical cell shown is essentially the same in terms of structure and function as that described in the Fig. 52 and 53 the embodiment shown is the same, so reference is made to its description in this respect.

[0612] In Fig. 56 An insulating element 136 of a further embodiment of an electrochemical cell 100, which is not shown in its entirety in the drawing, is shown.

[0613] The further embodiment of an electrochemical cell 100 differs essentially in terms of structure and function from the one described in Fig. 55 In the illustrated embodiment, the insulating element 136 has several, in this case two, filling channels 170, each of which connects a filling opening 164 of the insulating element 136 with a, for example pocket-shaped, recess 165 of the insulating element 136.

[0614] It can be advantageous if a filling opening 164 is arranged between the first opening 127a and a central area of ​​the insulating element 136 located midway between the openings 127a, 127b.

[0615] A further filling opening 164 is preferably arranged between the second opening 127b and the central area of ​​the insulating element 136 located between the openings 127a, 127b.

[0616] It can be advantageous if the filling channels 170 are designed as open channels.

[0617] For example, the filling channels 170 are designed as elongated areas in which the insulating element 136 has a locally reduced thickness, for example by about 20% or more, compared to an average thickness of the rest of the insulating element 136.

[0618] It may be provided that each filling channel 170 has a filling channel section 170a connected to a filling opening 164, the main direction of extension of which is arranged at least approximately parallel to a main side of the electrochemical cell 100.

[0619] Preferably, the filling channel section 170a is directly connected to further filling channel sections 170b, 170c.

[0620] The further filling channel sections 170b, 170c form, for example, at least approximately a V-shape and / or connect the filling channel section 170a with a recess 165 of the insulating element 136, for example pocket-like.

[0621] When the first resin material is poured into the filling opening 164 located adjacent to the first opening 127a, the first resin material preferably flows through the filling channel section 170a and through the further filling channel sections 170b, 170c. Subsequently, the first resin material is collected and / or accumulates in the first recess 165 of the insulating element 136.

[0622] When the second resin material is poured into the filling opening 164 located adjacent to the second opening 127b, the second resin material preferably flows through the filling channel section 170a and through the further filling channel sections 170b, 170c. Subsequently, the second resin material is collected and / or accumulates in the second recess 165 of the insulating element 136.

[0623] The insulating element 136 according to Fig. 56 can be used in any of the described embodiments of an electrochemical cell 100.

[0624] Positioning projections 138 are not shown in the drawing, but may be provided.

[0625] Moreover, the in Fig. 56 The illustrated embodiment of an electrochemical cell 100 is essentially the same in terms of structure and function as that shown in Fig. 55 the embodiment shown is the same, so reference is made to its description in this respect.

[0626] In Fig. 57 An insulating element 136 of a further embodiment of an electrochemical cell 100, which is not shown in its entirety in the drawing, is shown.

[0627] The further embodiment differs essentially from the one in terms of structure and function in that Fig. 55In the illustrated embodiment, two filling openings 164 are arranged in each of the two recesses 165 of the insulating element 136.

[0628] The two filling openings 164 are preferably located on a diagonal that runs through the respective recess 165. For example, the two filling openings 164 are arranged in corner regions of the respective recess 165 that lie on a diagonal.

[0629] Positioning projections 138 are preferably unnecessary.

[0630] The insulating element 136 according to Fig. 57 can be used in any of the described embodiments of an electrochemical cell 100.

[0631] Moreover, the in Fig. 57 The illustrated embodiment of an electrochemical cell 100 is essentially the same in terms of structure and function as the Fig. 55 the embodiment shown is the same, so reference is made to its description in this respect.

[0632] In Fig. 58 An insulating element 136 of a further embodiment of an electrochemical cell 100, which is not shown in its entirety in the drawing, is shown.

[0633] The further embodiment of an electrochemical cell 100 differs essentially in terms of structure and function from the one described in Fig. 55 In the illustrated embodiment, the insulating element 136 comprises two flow guide elements 168, which are arranged at least approximately in a spiral shape around the first opening 127a and / or the second opening 127b.

[0634] The flow-guiding elements 168 preferably serve to ensure a uniform distribution of the first resin material in the first connection area 130 and / or the second resin material in the second connection area 156.

[0635] It may be provided that the flow guide elements 168 each have a varying height.

[0636] For example, the flow-guiding elements 168 extend partially or completely from a recess 165 of the insulating element 136 to an extension of the insulating element 136 in areas of the insulating element 136 adjacent to the recess 165.

[0637] For example, the flow guide elements 168 are at least approximately flush with the rest of the insulating element 136 perpendicular to a main extension plane of the insulating element 136 and / or do not project beyond a base body of the insulating element 136.

[0638] It can be advantageous if a filling opening 164 is arranged on an edge of the insulating element 136 facing a side side of the electrochemical cell 100 within the respective recess 165.

[0639] Positioning projections 138 are preferably unnecessary.

[0640] The insulating element 136 according to Fig. 58can be used in any of the described embodiments of an electrochemical cell 100.

[0641] Moreover, the in Fig. 58 The illustrated embodiment of an electrochemical cell 100 is essentially identical in structure and function to its Fig. 55 the embodiment shown is the same, so reference is made to its description in this respect.

[0642] In Fig. 59 An insulating element 136 of a further embodiment of an electrochemical cell 100, which is not shown in its entirety in the drawing, is shown.

[0643] The further embodiment of an electrochemical cell 100 differs essentially in terms of structure and function from the one described in Fig. 58 In the illustrated embodiment, the flow guide elements 168 form a closed ring shape.

[0644] A first flow-guiding element 168 preferably surrounds the first opening 127a of the insulating element 136 in a ring shape. It is preferably arranged at a distance from the first opening 127a.

[0645] It can be advantageous if a second flow-guiding element 168 completely surrounds the second opening 127b of the insulating element 136 in a ring shape. The second flow-guiding element 168 is, in particular, arranged at a distance from the second opening 127b of the insulating element 136.

[0646] The flow-guiding elements 168 preferably have an at least approximately rectangular cross-section. The cross-section is preferably parallel to a principal plane of extension of the insulating element 136.

[0647] It may be provided that the flow guide elements 168 have different heights from each other, so that in particular flow path-dependent flow guide elements are formed.

[0648] The insulating element 136 according to Fig. 59 can be used in any of the described embodiments of an electrochemical cell 100.

[0649] Moreover, the in Fig. 59 The further embodiment of an electrochemical cell 100 shown is essentially the same in terms of structure and function as that shown in Fig. 58 the embodiment shown is the same, so reference is made to its description in this respect.

[0650] In the Figs. 60 to 72 The following is an example of the shapes that the first sealing element 134 and / or the second sealing element 152 can have.

[0651] The sealing elements 134, 152 according to the Figs. 60 to 72 can be used in all of the described embodiments of an electrochemical cell 100.

[0652] The following examples apply both to sealing elements 134, 152 made of a polymer material and to sealing elements 134, 152 which form a component of the cover element 110 and are in particular made of a metallic material, for example aluminium.

[0653] The sealing element 134, 152 may have an at least approximately rectangular cross-section. The cross-section is preferably parallel to a principal plane of extension of the cover element 110. In particular, the sealing element 134, 152 forms a closed ring shape ( Fig. 60 ).

[0654] The second sealing element 152 may comprise two metallic beads arranged parallel to each other. The beads are arranged, for example, at least approximately parallel to a main face of the electrochemical cell 100 and / or to a side face of the electrochemical cell 100 (not shown).

[0655] As an alternative to a closed ring shape, the sealing element 134, 152 can have one or more interruptions 166 ( Fig. 61 ).

[0656] In particular, regardless of the shape of the sealing element 134, 152, approximately 350° to approximately 355° of a circle, the center of which forms the central axis 142 of the first contact element 120 or the central axis 154 of the second contact element 124, is enclosed by the sealing element 134, 152 in a cross-section. In an installed position of the sealing element 134, 152, the cross-section is preferably parallel to a principal extension plane of the cover element 110.

[0657] It can be advantageous if the sealing element 134, 152 has an at least approximately U-shaped cross-section, wherein the free ends of the U-shape are connected to each other, in particular by a connecting section. The connecting section is preferably arranged at least approximately parallel to a main extension direction of the respective opening 126a, 126b (cf. Fig. 62 ).

[0658] Alternatively, it can be provided that the sealing element 134, 152, for example, has a curvature on a side facing away from the respective opening 126a, 126b, which points away from an interior space surrounded by the sealing element 134, 152 (cf. Fig. 63 ).

[0659] According to another alternative, the sealing element 134, 152 may have several immediately adjacent bulges, which, for example, form one side of the sealing element 134, 152.

[0660] For example, the sealing element 134, 152 has two bulges pointing away from an interior space surrounded by the sealing element 134, 152.

[0661] It can be advantageous if a separating section between the two bulges extends into an interior space surrounded by the sealing element 134, 152. The bulges are preferably arranged on a side of the sealing element 134, 152 facing away from the respective opening 126a, 126b (see Figure 1). Fig. 64 ).

[0662] It may be provided that the sealing element 134, 152 has an at least approximately rectangular cross-section and two projections each, which have a principal extension direction that is arranged at least approximately parallel to a principal extension direction of the respective opening 126a, 126b (cf. Fig. 65 ). The projections preferably extend into an interior space surrounded by a base body of the sealing element 134, 152.

[0663] Alternatively, the sealing element 134, 152 may each have two tongue-shaped projections, which are arranged inclined inwards and / or towards the respective opening 126a, 126b (cf. Fig. 66 ).

[0664] In particular, the sealing element 134, 152 has three projections which, along a direction arranged perpendicular to a main extension direction of the respective opening 126a, 126b, alternately project into an interior space surrounded by the sealing element 134, 152 from opposite sides.

[0665] A principal extension direction of the projections is preferably arranged at least approximately parallel to a principal extension direction of the respective opening 126a, 126b ( Fig. 67 ).

[0666] Alternatively, it can be provided that the projections point obliquely away from the respective opening 126a, 126b ( Fig. 68 ).

[0667] It can be advantageous if the sealing element 134, 152 has several projections which are spaced apart from a base body of the respective sealing element 134, 152 and / or are arranged in an interior space surrounding the base body of the respective sealing element 134, 152.

[0668] Preferably, the principal extension directions of each pair of projections form an obtuse angle with each other (cf. Fig. 69 ).

[0669] Alternatively, it can be provided that a single projection is arranged in an interior space surrounded by a base body of the sealing element 134, 152, which has an at least approximately circular cross-section (cf. Fig. 70 ) or at least an approximately elliptical and / or oval cross-section (cf. Fig. 71 ) exhibits.

[0670] In the case of a projection with an approximately elliptical and / or oval cross-section, it preferably has a principal extension direction which is arranged at least approximately perpendicular to a principal extension direction of the respective opening 126a, 126b.

[0671] It may be provided that the second sealing element 152 has a projection with an approximately round cross-section, which comprises or is formed from a metallic material ( Fig. 72 ).

[0672] As especially in the Figs. 73 to 76 As shown, the cell terminals 118, 122 can have cuboid-shaped passage openings 119 depending on the shape of the respective contact element 120, 124 (cf. Fig. 73 and 74 ) or passage openings 119 with an oval cross-section (see Fig. 75 and 76 exhibit.

[0673] The main extension directions of the passage openings 119 can be parallel to a main side of the electrochemical cell 100 (cf. Fig. 74 and 76 ) or perpendicularly (cf. Fig. 73 and 75 ) be arranged to the main page of the electrochemical cell 100.

[0674] One in the Figs. 77 to 83 The further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, differs essentially in terms of structure and function from the one shown in the Figs. 1 to 10 In the first embodiment of an electrochemical cell 100 shown, the cover element 110 has a second recessed area 180, for example on a cathode side (see figure). Fig. 78 ).

[0675] The cathode side is indicated by a plus sign in the drawings. The anode side is indicated by a minus sign in the drawings.

[0676] The cathode side and the anode side are in the Figs. 77 to 83 The depicted embodiment is reversed compared to the depictions of the other embodiments.

[0677] The second recessed area 180 is, for example, a debossed area and / or formed by debossing. The second recessed area 180 preferably surrounds and / or limits the second potting element 156. In particular, the second recessed area 180 serves as a receptacle for the second resin material.

[0678] For example, the second recessed area 180 is basin-shaped and / or forms a casting basin for the second resin material in a flowable state. During the filling process of the second connection area 150 with the second resin material, the second resin material preferably flows into the second recessed area 180.

[0679] It can be advantageous if the second recessed area 180 surrounds the second opening 126b in the cover element 110. It can be provided that a larger portion of the second recessed area 180 is arranged on a side of the second opening 126b facing the central section of the cover element 110, while a second, smaller portion of the second recessed area 180 is arranged on a side facing a narrow side of the electrochemical cell 100.

[0680] It can be advantageous if the second recessed area 180 is surrounded by a cell terminal support area 182, in particular in an annular form. The cell terminal support area 182 preferably serves as a support surface for the second cell terminal 122 and / or, in a mounted state of the electrochemical cell 100, is in direct contact with the second cell terminal 122.

[0681] Preferably, the second recessed area 180 has a bulge 185 on a side of the recessed area 180 facing the central area of ​​the cover element 110, which serves, for example, as a degassing opening during a filling process of the second resin material.

[0682] It may be provided that the cover element 110, for example on the anode side, has a first recessed area (not shown in the drawing).

[0683] The first recessed area can be designed like the second recessed area 180. Reference is made to the corresponding explanations for the second recessed area 180 with regard to the first recessed area.

[0684] By forming the second recessed area 180 and / or a first recessed area, sealing elements 134, 152 are preferably unnecessary.

[0685] As especially in Fig. 79As can be seen, the insulating element 136 preferably has several, in this case regularly arranged, through-openings 184. The through-openings 184 are, for example, at least approximately oval or at least approximately rectangular and / or are arranged substantially over the entire area of ​​the insulating element 136.

[0686] For example, at least approximately rectangular passage openings 184 are arranged over the central section of the insulating element 136 according to a first arrangement pattern.

[0687] In particular, further passage openings 184, for example at least approximately square, are arranged towards the narrow sides of the insulating element 136 according to a second arrangement pattern.

[0688] Preferably, the insulating element 136 is designed in multiple parts, for example, in two parts. In this regard, reference is made to the explanations in the Fig. 11 and 12Reference is made to the illustrated embodiments.

[0689] As especially in Fig. 79 , 82 and 83 As can be seen, the first contact element 120 preferably has a first resin material filling opening 188. The first resin material filling opening 188 preferably serves as an opening for filling a volume which, in the cured state of the first resin material, forms the first potting element 130.

[0690] For example, the first resin material is filled in a flowable state through the first resin material filling opening 188.

[0691] It can be advantageous if the second contact element 124 has a second resin material filling opening 186, which serves in particular as an opening for filling a volume forming the second potting element 156 in the hardened state of the second resin material.

[0692] For example, the second resin material is filled in a flowable state through the second resin material filling opening 186, for example into the second recessed area 180.

[0693] The first resin material filling opening 188 and / or the second resin material filling opening 186 preferably eliminate the need for filling openings in the insulating element 136.

[0694] In particular, a volume forming the first connecting element 130 and / or a volume forming the second connecting element 156 is filled through the contact elements 120, 124.

[0695] As especially in Fig. 82 As can be seen, the second contact element 124 and the second connecting conductor 116 are preferably separate components, which are connected to each other, for example, by a transition part 190.

[0696] It can be advantageous if the second contact element 124 and the second connecting conductor 116 are arranged at least approximately in an L-shape and / or at an angle to each other in a cross-section taken perpendicular to the main extension plane of the cover element 110.

[0697] As especially in Fig. 83 As can be seen, the first contact element 120 and the first connecting conductor 114 are preferably formed in one piece.

[0698] The first contact element 120 and the first connecting conductor 114 preferably form at least an approximate L-shape in a cross-section taken perpendicular to the main extension plane of the cover element 110 and / or are arranged at an angle to each other.

[0699] Moreover, the one in the Figs. 77 to 83 The further embodiment of an electrochemical cell 100 shown is essentially the same in terms of structure and function as that described in the Figs. 1 to 10the first embodiment shown is the same, so reference is made to its description in this respect.

[0700] One in the Figs. 84 to 87 The further embodiment of an electrochemical cell 100, not shown in its entirety in the drawing, differs essentially in terms of structure and function from the one shown in the Figs. 77 to 83 In the embodiment shown, individual elements of the electrochemical cell 100 are designed with a reduced average thickness compared to previous embodiments.

[0701] Preferably, the average thickness of the first connecting conductor 114 is approximately 1 / 10 or less than the average width of the first connecting conductor 114 taken perpendicular to the thickness.

[0702] Preferably the average thickness of the first connecting conductor 114 is preferably about 0.8 mm or less, for example about 0.7 mm or less.

[0703] The average thickness of the first connecting conductor 114 is preferably defined perpendicular to its main extension plane and / or corresponds in particular to an average material thickness of a material, for example a sheet material, from which the first connecting conductor 114 is made.

[0704] It can be advantageous if the average thickness of the second connecting conductor 116 is approximately 1 / 10 or less of the average width of the second connecting conductor 116 taken perpendicular to the thickness.

[0705] Preferably, the average thickness of the second connecting conductor 116 is preferably approximately 0.8 mm or less, for example approximately 0.7 mm or less.

[0706] The average thickness of the second connecting conductor 116 is preferably defined perpendicular to its main extension plane and / or corresponds to an average material thickness of a material, for example a sheet material, from which the second connecting conductor 116 is made.

[0707] Due to the reduced average thickness of the first connecting conductor 114 and / or the second connecting conductor 116, embossing of the respective connecting conductor 114, 116 is preferably unnecessary.

[0708] Preferably, the insulating element 136 has an average thickness which is less than the average thicknesses of the insulating elements 136 of the embodiments described above.

[0709] It can be advantageous if the average thickness of the insulating element 136 is approximately 1 / 10 or less, for example approximately 1 / 15 or less, of the average width of the insulating element 136 taken perpendicular to the thickness.

[0710] In particular, the average thickness of the insulating element 136 is approximately 1.8 mm or less, for example approximately 1.7 mm or less.

[0711] In particular for a cost-effective design of the electrochemical cell 100, it may be advantageous if the average width B1 of the first contact element 120 in a first joining area 192 with the first cell terminal 118 is approximately ½ or less, in particular approximately 2 / 5 or less, of the average width of the first cell terminal 118.

[0712] The average width B1 of the first contact element 120 and the average width of the first cell terminal 118 are preferably defined at least approximately parallel to each other and / or arranged at least approximately parallel to a narrow side of the electrochemical cell 100.

[0713] The first joining area 192 is preferably an area in which the first contact element 120 and the first cell terminal 118 are connected to each other. Preferably, the first contact element 120 is guided through and / or fills the opening 119 of the first cell terminal 118 in the first joining area 192.

[0714] Preferably, the average width B2 of the second contact element 124 in a second joining area 194 with the second cell terminal 122 is approximately ½ or less, in particular approximately 2 / 5 or less, of the average width of the second cell terminal 122.

[0715] The average width B2 of the second contact element 124 and the average width of the second cell terminal 122 are preferably defined at least approximately parallel to each other and / or arranged at least approximately parallel to a narrow side of the electrochemical cell 100.

[0716] The second joining area 194 is preferably an area in which the second contact element 124 and the second cell terminal 122 are connected to each other. Preferably, the second contact element 124 is guided through and / or fills the passage opening 119 of the second cell terminal 122 in the second joining area 194.

[0717] For example, the average width B1 of the first contact element 120 and / or the average width B2 of the second contact element 124 in the respective joining area 192, 194 is approximately 10.5 mm or less, for example approximately 9.5 mm or less.

[0718] The average width B1 of the first contact element 120 in the first joining area 192 preferably corresponds substantially to an average width of the passage opening 119 of the first cell terminal 118.

[0719] Additionally or alternatively, the average width B2 of the second contact element 124 in the second joining area 194 preferably corresponds substantially to an average width of the passage opening 119 of the second cell terminal 122.

[0720] It can be advantageous if the first contact element 120 in the first joining area 192 has an average thickness D1 which is approximately 2 / 10 or less, for example approximately 1 / 10 or less, of the average width B1 of the first contact element 120 in the first joining area 192.

[0721] It can be advantageous if the second contact element 124 in the second joining area 194 has an average thickness D2 which is approximately 2 / 10 or less, for example approximately 1 / 10 or less, of the average width B2 of the second contact element 124 in the second joining area 194.

[0722] The average thickness D1 of the first contact element 120 is defined, in particular, at least approximately, perpendicular to the average width B1 of the first contact element 120.

[0723] Preferably, the average thickness D2 of the second contact element 124 is defined at least approximately perpendicular to the average width B2 of the second contact element 124.

[0724] Preferably the average thickness D1 of the first contact element 120 in the first joining area 192 and / or the average thickness D2 of the second contact element 124 in the second joining area 194 is approximately 0.8 mm or less, for example approximately 0.7 mm or less.

[0725] The average thickness D1 of the first contact element 120 in the first joining area 192 is preferably substantially identical to an average length of the passage opening 119 of the first cell terminal 118 in the first joining area 192.

[0726] In particular, the average thickness D2 of the second contact element 124 in the second joining area 194 is essentially identical to an average length of the passage opening 119 of the second cell terminal 122 in the second joining area 194.

[0727] It can be advantageous if the average thickness of the cover element 110 in a cross-section taken perpendicular to its main extension plane is approximately 1 / 10 or less, for example approximately 1 / 20 or less, of the average width of the cover element 110 perpendicular to its thickness.

[0728] Preferably, the average thickness of the cover element 110 is approximately 1.9 mm or less, for example approximately 1.8 mm or less.

[0729] As especially in the Figs. 85 to 87 As can be seen, the first connecting conductor 114 and the first contact element 120 are preferably formed in one piece and / or do not have any thickenings due to material transitions. In particular, the second connecting conductor 116 and the second contact element 124 are formed in one piece and / or do not have any thickenings due to material transitions.

[0730] It can be advantageous if the first connecting conductor 114 and the first contact element 120 are at least approximately stepped in a cross-section taken perpendicular to the main extension plane of the cover element 110 and / or do not have a T-shape (as a whole).

[0731] The first contact element 120 is preferably formed in a cross-section that is at least approximately rectangular in shape and parallel to the main extension plane of the cover element 110.

[0732] Preferably, the second connecting conductor 116 and the second contact element 124 are formed at least approximately in a stepped cross-section perpendicular to the main extension plane of the cover element 110 and / or do not have a T-shape (as a whole).

[0733] In particular, the second contact element 124 is at least approximately rectangular in cross-section taken parallel to the main extension plane of the cover element 110.

[0734] The aforementioned differences in the Figs. 84 to 87 The further embodiment of an electrochemical cell shown here preferably serves to optimize costs.

[0735] The first resin material and / or the second resin material is preferably introduced through a first filling opening 196 and a second filling opening 198, respectively. The first filling opening 196 and / or the second filling opening 198 are, in this case, designed as openings in the insulating element 136.

[0736] Filling the first resin material and / or the second resin material through the first contact element 120 or the second contact element 124 is preferably unnecessary.

[0737] Moreover, the one in the Figs. 84 to 87The further embodiment of an electrochemical cell shown is essentially the same in terms of structure and function as that described in the Figs. 77 to 83 the embodiment shown is the same, so reference is made to its description in this respect.

[0738] The potting elements 128, 150 eliminate the need for additional tools to create a seal between the cover element and the contact elements 120, 124. Curing can occur within the component.

[0739] Component complexity is preferably reduced.

[0740] The casting elements 128, 150 preferably act as gap fillers.

Claims

1. Electrochemical cell (100) for an electrochemical system (102), comprising: - an electrochemical element (106) for receiving, storing and / or providing electrical energy; - a housing (104) for receiving the electrochemical element (106), wherein the housing (104) surrounds an interior (108) of the electrochemical cell (100) and comprises a cover element (110); - a first cell terminal (118) and a second cell terminal (122) for connecting the electrochemical cell (100) to a cell contacting system; - a first contact element (120), which connects the first cell terminal (118) to a first connecting conductor (114); and - a second contact element (124), which connects the second cell terminal (122) to a second connecting conductor (116), wherein the first contact element (120), in a first connecting region (130), is fixed to the cover element (110) by means of a first potting element (128), wherein the first potting element (128) is formed from a first polymer material, which can comprise or be formed from a first resin material in particular, and / or wherein the second contact element (124), in a second connecting region (156), is fixed to the cover element (110) by means of a second potting element (150), wherein the second potting element (150) is formed from a second polymer material, which can comprise or be formed from a second resin material in particular, wherein - the cover element (110), on a side facing away from the interior (108), has a first recessed region for receiving the first potting element (128) and / or the cover element (110), on a side facing away from the interior (108), has a second recessed region (180) for receiving the second potting element (150), wherein the first recessed region has a protruding portion and / or the second recessed region (180) has a protruding portion (185), wherein optionally provision can be made for the first recessed region and / or the second recessed region (180) to be formed by embossing, and / or - an insulating element (136) of the electrochemical cell (100) has a plurality of recesses (165) for receiving the first potting element (128) and / or the second potting element (150), wherein in particular one or more flow guiding elements (168) for distributing the first resin material and / or the second resin material during production of the electrochemical cell (100) can be arranged in each of the recesses (165), and / or - the electrochemical cell (100) comprises an insulating element (136) which, on an inner side (132) of the cover element (110), the inner side facing the interior (108), is connected to the cover element (110), wherein the insulating element (136), adjacent to the first connecting region (130) and / or adjacent to the second connecting region (156), has at least one filling opening (164) for filling the first resin material into the first connecting region (130) and / or for filling the second resin material into the second connecting region (156), wherein provision can be made for at least one filling channel (170) to be connected to the at least one filling opening (164).

2. Electrochemical cell (100) according to Claim 1, characterized in that the following applies: - the first polymer material and / or the second polymer material have / has a hardness, which can be determined in accordance with DIN EN ISO 868, in a range of approximately 40 Shore D to approximately 100 Shore D; and / or - the first polymer material and / or the second polymer material have / has a glass transition temperature of approximately 90°C or more; and / or - the first resin material and / or the second resin material comprise / comprises or are / is formed from one or more of the following materials: epoxy resin material, phenolic resin material, aminoplast material, polyurethane material, silicone material, polyester resin material, ABS resin material.

3. Electrochemical cell (100) according to Claim 1 or 2, characterized in that the first resin material and / or the second resin material comprise / comprises one or more fillers, wherein the one or more fillers are selected in particular from one or more of the following: inorganic fillers, in particular silicon oxide, carbonate, carbide, in particular silicon carbide, nitride, in particular metal nitride, metal oxide.

4. Electrochemical cell (100) according to any of Claims 1 to 3, characterized in that the cover element (110), on an inner side (132) facing the interior (108), is connected to the, in particular plate-like, insulating element (136), wherein the insulating element (136), on a side facing the cover element (110), comprises one or more positioning projections (138) and / or one or more positioning depressions, which engage into one or more complementary positioning depressions (140) and / or positioning projections of the cover element (110), wherein optionally provision can be made for the insulating element (136) to have a plurality of, in particular regularly arranged, passage openings (184), wherein the passage openings (184) are preferably at least approximately oval or at least approximately rectangular.

5. Electrochemical cell (100) according to any of Claims 1 to 4, characterized in that the electrochemical cell (100) comprises a first sealing element (134), which in particular is annularly closed or has at least one interruption (166) and radially surrounds the first potting element (128) with respect to a central axis (142) of the first contact element (120) on an outer side of the cover element (100), the outer side facing away from the interior (108) of the electrochemical cell (100); and / or in that the electrochemical cell (100) comprises a second sealing element (152) which in particular is annularly closed or has at least one interruption (166) and radially surrounds the second potting element (150) with respect to a central axis (154) of the second contact element (124) on an outer side of the electrochemical cell (100) of the cover element (110), the outer side facing away from the interior (108), wherein optionally provision can be made for the first sealing element (134) to have at least one interruption (166) in the radial direction with respect to the centre axis (142) of the first contact element (120) or for the first sealing element (134) to project beyond the first cell terminal (118) in the radial direction with respect to the centre axis (142) of the first contact element (120) and / or for the second sealing element (152) to have at least one interruption (166) in the radial direction with respect to the centre axis (154) of the second contact element (124) or for the second sealing element (152) to project beyond the second cell terminal (122) in the radial direction with respect to the centre axis (154) of the second contact element (124).

6. Electrochemical cell (100) according to any of Claims 1 to 5, characterized in that a first sealing element (134) of the electrochemical cell (100) comprises or is formed from a third polymer material and / or in that a second sealing element (152) of the electrochemical cell (100) comprises or is formed from a fourth polymer material, wherein the first sealing element (134) and / or the second sealing element (152) are / is applied to a main body of the cover element (100), in particular in the form of a sealing bead, in a printing process in particular, wherein optionally provision can be made for the third polymer material and / or the fourth polymer material to comprise one or more fillers, wherein the one or more fillers are selected in particular from one or more of the following: inorganic fillers, in particular silicon oxide, carbonate, carbide, in particular silicon carbide, nitride, in particular metal nitride, metal oxide; and / or for the fourth polymer material to comprise one or more conductive additives, wherein the one or more conductive additives are selected in particular from one or more of the following: carbon materials, in particular conductive black, graphite, graphene, carbon nanotubes, carbon fibres and / or carbon nanobulbs, particulate metal materials, in particular metal powder, electrically conductive ceramic materials, in particular nitrides and / or carbides, electrically conductive polymers, in particular trans-polyacetylene, polypyrrole, polyaniline, poly(phenylene), polythiophene and / or polystyrene-doped poly-(3.4-ethylenedioxythiophene) (PEDOT:PSS).

7. Electrochemical cell (100) according to any of Claims 1 to 6, characterized in that a first sealing element (134) of the electrochemical cell (100) and / or a second sealing element (152) of the electrochemical cell (100) form a constituent part of the cover element (110) and in particular are each formed by a raised portion of the cover element (110), which raised portion in particular is annularly closed or has at least one interruption and extends away from a main body of the cover element (110) in a direction pointing away from the interior (108) of the electrochemical cell (100).

8. Electrochemical cell (100) according to any of Claims 1 to 7, characterized a) in that the first contact element (120) and / or the second contact element (124) comprise at least two contact element components (120a, 120b, 120c, 124a, 124b, 124c) which in particular comprise or are formed from different metal materials and which, in particular in the first connecting region (130) and / or in the second connecting region (156), are connected to each other in a cohesive fashion, in particular by means of laser welding and / or roll plating; and / or b) in that the first contact element (120) has a first resin material filling opening (188) for filling the first resin material into the first connecting region (130) and / or in that the second contact element (124) has a second resin material filling opening (186) for filling the second resin material into the second connecting region (150); and / or c) in that the first connecting conductor (114) has an average thickness which is approximately 1 / 10 or less of an average width of the first connecting conductor (114) perpendicular to the thickness, wherein the average thickness is preferably approximately 0.8 mm or less, for example approximately 0.7 mm or less, and / or in that the second connecting conductor (116) has an average thickness which is approximately 1 / 10 or less of an average width of the second connecting conductor (116) perpendicular to the thickness, wherein the average thickness is preferably approximately 0.8 mm or less, for example approximately 0.7 mm or less, and / or d) in that the first contact element (120), in a first joining region (192) with the first cell terminal, has an average thickness (D1) which is approximately 2 / 10 or less of an average width (B1) of the first contact element (120) perpendicular to the thickness (D1), wherein the average thickness (D1) is preferably approximately 0.8 mm or less, for example approximately 0.7 mm or less and / or in that the second contact element (124), in a second joining region (194) with the second cell terminal (122), has an average thickness (D2) which is approximately 2 / 10 or less of an average width (B2) of the second contact element (124) perpendicular to the thickness (D2). wherein the average thickness (D2) is preferably approximately 0.8 mm or less, for example approximately 0.7 mm or less; and / or e) in that an average width (B1) of the first contact element (120) in a first joining region (192) with the first cell terminal (118) is approximately ½ or less, in particular 2 / 5 or less, than an average width of the first cell terminal (118) in a direction parallel to the width (B1) of the first contact element (120), wherein the average width (B1) is preferably approximately 10.0 mm or less and / or in that an average width (B2) of the second contact element (124) in a second joining region (194) with the second cell terminal (122) is approximately ½ or less, in particular 2 / 5 or less, of an average width of the second cell terminal (122) in a direction parallel to the width (B2) of the second contact element (124), wherein the average width (B2) is preferably approximately 10.0 mm or less.

9. Electrochemical cell (100) according to any of Claims 1 to 8, characterized in that the first connecting conductor (114) and the first contact element (120) are formed in one piece and / or in that the first contact element (120) is at least approximately rectangular in a cross section parallel to a main plane of extent of the cover element (110) and / or in that the second connecting conductor (116) and the second contact element (124) are formed in one piece and / or in that the second contact element (124) is at least approximately rectangular in a cross section parallel to a main plane of extent of the cover element (110).

10. Electrochemical cell (100) according to any of Claims 1 to 9, characterized a) in that an average thickness of the cover element (110) in a cross section perpendicular to its main plane of extent is approximately 1 / 10 or less, for example approximately 1 / 20 or less, of an average width of the cover element (110) perpendicular to its thickness, and / or in that the average thickness of the cover element (110) is approximately 1.9 mm or less, for example, approximately 1.8 mm or less; and / or b) in that an average thickness of an insulating element (136) of the electrochemical cell (100) is approximately 1 / 10 or less, for example approximately 1 / 15 or less, of an average width of the insulating element perpendicular to the thickness, wherein the average thickness of the insulating element (136) is preferably approximately 1.7 mm or less.

11. Electrochemical cell (100) according to any of Claims 1 to 10, characterized a) in that the electrochemical cell (100) comprises at least one snap-over element (162), which can be deflected outwards from an inoperative state to a working state when a critical pressure and / or a critical temperature in the interior (108) of the electrochemical cell (100) is exceeded, and thus establishes electrical contact between the cover element (110) and the first cell terminal (118); and / or b) in that the first contact element (120) and / or the second contact element (124) are connected to an insulating element (136) of the electrochemical cell (100) in a cohesive and / or positively locking and / or non-positively locking fashion.

12. Electrochemical system (102) comprising one or more electrochemical cells (100) according to any of Claims 1 to 11.

13. Method for producing an electrochemical cell according to any of Claims 1 to 11, wherein - the cover element (110), on a side facing away from the interior (108), has a first recessed region for receiving the first potting element (128) and / or the cover element (110), on a side facing away from the interior (108), has a second recessed region (180) for receiving the second potting element (150), wherein the first recessed region has a protruding portion and / or the second recessed region (180) has a protruding portion (185), wherein optionally provision can be made for the first recessed region and / or the second recessed region (180) to be formed by embossing, and / or - an insulating element (136) of the electrochemical cell (100) has a plurality of recesses (165) for receiving the first potting element (128) and / or the second potting element (150), wherein in particular one or more flow guiding elements (168) for distributing the first resin material and / or the second resin material during production of the electrochemical cell (100) can be arranged in each of the recesses (165), and / or - the electrochemical cell (100) comprises an insulating element (136) which, on an inner side (132) of the cover element (110), the inner side facing the interior (108), is connected to the cover element (110), wherein the insulating element (136), adjacent to the first connecting region (130) and / or adjacent to the second connecting region (156), has at least one filling opening (164) for filling the first resin material into the first connecting region (130) and / or for filling the second resin material into the second connecting region (156), wherein provision can be made for at least one filling channel (170) to be connected to the at least one filling opening (164), wherein the method comprises the following: - providing the cover element (110), which comprises a first opening (126a) and / or a second opening (126b); - positioning the first contact element (120), which is or can be connected to the first cell terminal (118) in particular, in the first opening (126a) and / or positioning the second contact element (124), which is or can be connected to the second cell terminal (122) in particular, in the second opening (126b); - filling the first resin material into a first connecting region (130) surrounded by the cover element (110), the first contact element (120) and in particular the first cell terminal (118) in a casting process and / or filling the second resin material into a second connecting region (156) surrounded by the cover element, the second contact element (124) and in particular the second cell terminal (122) in a casting process; - drying and / or curing the first resin material so as to form the first potting element (128) and / or drying and / or curing the second resin material so as to form the second potting element (150), wherein optionally provision is made in the method for at least one first sealing element (134) to be applied to the cover element (110) and / or introduced into the cover element (110), the first sealing element radially surrounding the first connecting region (130), on an outer side of a main body of the cover element (110), the outer side facing away from an interior (108) of the electrochemical cell (100), and / or for at least one second sealing element (152) to be applied to the cover element (110) and / or introduced into the cover element (110), the second sealing element radially surrounding the second connecting region (156), on the outer side of the main body of the cover element (110), the outer side facing away from the interior (108) of the electrochemical cell (100).