Energy storage battery and method of manufacture

Abstract

An accumulator battery (100) is provided, which has a composite (104) composed of strip-shaped electrodes and separators, which composite is in the form of a cylindrical winding with two end sides (104b, 104c) and a winding sleeve (104a) located therebetween. The electrodes each have a current collector (115, 125) and are arranged offset to one another in the composite, such that a longitudinal edge of the negative electrode exits from one of the end sides (104b, 104c) and a longitudinal edge of the positive electrode exits from the other end side. In a housing, the composite (104) is oriented axially such that the winding sleeve (104a) lies against an inner side (101b) of a tubular housing part (101) configured as a tube, which housing comprises a metallic tubular housing part (101) configured as a tube with a terminal circular opening (101c). In a preferred embodiment, the winding sleeve is formed by a separator or by a separate plastic strip and is thus insulated with respect to the housing part (101). For electrical contacting of one of the electrodes, the battery (100) comprises a contact element (110), which is in direct contact with the longitudinal edge (115a, 125a) exiting from one of the end sides and is connected to this longitudinal edge, preferably by welding. It is proposed to use a contact element with a circular edge as the contact element (110) and to close the terminal circular opening (101c) of the tubular housing part (101) with the contact element (110).

Description

Technical Field

[0001] The present invention described below relates to an energy storage battery comprising an electrode-diaphragm composite. Background Technology

[0002] An electrochemical cell converts stored chemical energy into electrical energy through redox reactions. An electrochemical cell typically consists of a positive electrode and a negative electrode separated by a membrane. During discharge, electrons are released at the negative electrode through an oxidation process. This generates an electron flow that can be drawn upon by an external electrical load, thus serving as an energy source for the electrochemical cell. Simultaneously, an ion flow corresponding to the electrode reactions occurs within the cell. This ion flow traverses the membrane and is facilitated by an electrolyte that guides the ions.

[0003] If the discharge is reversible, meaning there is a possibility of reversing the chemical energy to electrical energy conversion that occurred during discharge and thereby recharging the battery, it is called a secondary battery. In secondary batteries, the usual designation of the negative electrode as the anode and the positive electrode as the cathode generally refers to the discharge function of the electrochemical cell.

[0004] Currently, rechargeable lithium-ion batteries are used in a variety of applications because they can provide high current and, importantly, relatively high energy density. Lithium-ion batteries are based on the application of lithium, which can migrate back and forth between the battery's electrodes in the form of ions. The negative and positive electrodes of a lithium-ion battery are typically formed by so-called composite electrodes, which include both electrochemically active and non-electrochemically active components.

[0005] As the electrochemically active component (active material) for secondary lithium-ion batteries, in principle, any material capable of absorbing and re-releasing lithium ions can be considered. For the negative electrode, carbon-based particles, such as graphitic carbon, are often used for this purpose. Other non-graphitic carbon materials suitable for lithium intercalation can also be used. Furthermore, metallic and semi-metallic materials that can form alloys with lithium can also be used. That is, elements such as tin, aluminum, antimony, and silicon can form intermetallic phases with lithium. As the active material for the positive electrode, lithium cobalt oxide (LiCo2), lithium manganese oxide (LiMn2O4), lithium iron phosphate (LiFePO4), or their derivatives can be used, for example. Electrochemically active materials are typically contained in the electrode in particulate form.

[0006] As electrochemically inactive components, composite electrodes typically include planar and / or strip-shaped current collectors, such as metal films, serving as carriers for the respective active materials. The current collector for the negative electrode (anode current collector) may be made of, for example, copper or nickel, and the current collector for the positive electrode (cathode current collector) may be made of, for example, aluminum. Furthermore, as electrochemically inactive components, the electrode may include electrode binders (e.g., polyvinylidene fluoride (PVDF) or other polymers such as carboxymethyl cellulose), additives to improve conductivity, and other additives. The electrode binder ensures the mechanical stability of the electrode and often also ensures the adhesion of the active material to the current collector.

[0007] As an electrolyte, lithium-ion batteries typically consist of a solution of lithium salts, such as lithium hexafluorophosphate (LiPF6), in an organic solvent (e.g., carbonate ethers and carbonates).

[0008] In the manufacture of lithium-ion batteries, composite electrodes are combined with one or more separators to form a composite. Here, the electrodes and separators are mostly connected under pressure, and if necessary, through lamination or bonding. Subsequently, the basic functions of the battery can be established by wetting this composite with an electrolyte.

[0009] In various embodiments, the composite is configured as a wound body, or the composite is processed into a wound body. Typically, the composite includes a sequence of positive electrode / separator / negative electrode. As a so-called dual cell, the composite is usually manufactured in a possible order having a negative electrode / separator / positive electrode / separator / negative electrode, or a positive electrode / separator / negative electrode / separator / positive electrode.

[0010] For applications in the vehicle sector, such as electric bicycles, or other applications with high energy demands, such as tools, lithium-ion batteries with the highest possible energy density are required, which can be loaded with high currents during both charging and discharging.

[0011] Batteries used in these applications are often constructed as cylindrical cells, for example, with dimensions of 21 × 70 mm (diameter multiplied by height). This type of battery always has a composite structure in the form of a wound body. Currently, lithium-ion batteries of this size can achieve energy densities up to 270 Wh / kg. However, this energy density is considered merely a compromise. There is a market demand for batteries with higher energy density.

[0012] However, when developing better electrochemical batteries, other factors should be considered besides energy density alone. Equally crucial parameters are: the battery's internal resistance, which should be kept as low as possible to reduce power loss during charging and discharging; and the thermal bonding of the electrodes, which may be essential for battery temperature regulation. This parameter is also critical for cylindrical batteries containing a composite in the form of a wound structure. During rapid charging, heat can accumulate within the battery due to power loss, potentially leading to significant thermomechanical loads and consequently deformation and damage to the battery structure. This risk is increased when the current collector is electrically connected via a separate, electrically welded discharge strip (axially detached from the wound composite), as localized heating can occur at this discharge strip under high loads during charging or discharging.

[0013] WO 2017 / 215900 A1 describes a battery in which an electrode-separator composite and its electrodes are configured as strips and exist in the form of a wound structure. Each electrode has a current collector coated with electrode material. Within the electrode-separator composite, electrodes of opposite polarities are arranged staggered from each other, such that the longitudinal edge of the current collector for the positive electrode separates from the wound structure on one side, and the longitudinal edge of the current collector for the negative electrode separates from the wound structure on the other side. For electrical contact of the current collector, the battery has at least one contact element positioned on one of the longitudinal edges to obtain a linear contact area. The contact element is connected to the longitudinal edge along this linear contact area by welding. This allows for electrical contact of the current collector and, consequently, the electrodes, along its entire length. This significantly reduces the internal resistance within the described battery. Therefore, it allows for significantly better contact with any high currents that may occur.

[0014] A cylindrical spherical battery is known from US 6432574 B1, in which an electrode-diaphragm composite is also constructed by electrically contacting contact plates welded to the end sides. Figure 2Figure A shows a typical housing for accommodating such an electrode diaphragm composite. The housing comprises a cup-shaped housing member in which the wound electrode diaphragm composite is axially oriented. If the housing is closed by means of a multi-piece cover, an annular seal is fitted on the edge of the housing. To seal the housing, the end edge of the cup-shaped member is radially surrounded inward by the edge of the cover and the seal fitted on the edge. To facilitate this process, a deep groove is required directly beneath the cover. To apply axial pressure from above and below to the edge of the cover and the seal when the end edge bends, a tool is embedded in this deep groove during sealing. Therefore, the seal is compressed between the groove and the underside of the cover edge, and between the surrounding edge of the cup-shaped member and the upper side of the cover edge, resulting in an effective seal. However, the required groove is disadvantageous. On the one hand, the groove must be introduced into the housing in a separate step after the electrode diaphragm composite is inserted. On the other hand, the groove introduces ineffective volume, which must be overcome by means of a current conductor to establish electrical contact with the cover. Figure 2 In the case of the battery shown in A, an extra-long contact plate is welded to the upper side, and the contact plate is bent and welded to the inside of the cover. Summary of the Invention

[0015] The purpose of this invention is to provide an energy storage battery that is superior to existing technologies in terms of energy density and as uniform a current distribution as possible across the entire surface and length of its electrodes. Furthermore, this energy storage battery exhibits excellent characteristics in terms of internal resistance and passive heat dissipation. In addition, the battery also excels in terms of improved manufacturability and safety.

[0016] This objective is achieved by the energy storage battery described below, particularly by a preferred embodiment of the energy storage battery having the features described in claim 1, and by the method described below, particularly by the method having the features described in claim 10. Preferred designs for the battery and method are derived from the dependent claims.

[0017] The energy storage battery according to the present invention always has the following characteristics a to j:

[0018] a. The battery comprises an electrode-separator composite having an anode / separator / cathode sequence.

[0019] b. The electrode diaphragm composite exists in the form of a cylindrical wound body having two end sides and a wound body sleeve located therebetween.

[0020] c. The battery includes a casing, which comprises a metallic, tubular casing component having a circular opening at one end.

[0021] d. Within the housing, the electrode diaphragm composite, configured as a wound body, is axially oriented, such that the wound body is fitted against the inner side of the housing component configured as a tubular structure.

[0022] e. The anode is constructed in a strip shape and includes a strip-shaped anode current collector, the anode current collector having a first longitudinal edge and a second longitudinal edge, and two end members.

[0023] f. The anode current collector includes a strip-shaped main region and free side strips, the main region being covered with a layer of negative electrode material, and the side strips extending along a first longitudinal edge and not covered with electrode material.

[0024] g. The cathode is constructed in a strip shape and includes a strip-shaped cathode current collector, the cathode current collector having a first longitudinal edge and a second longitudinal edge, and two end members.

[0025] h. The cathode current collector includes a strip-shaped main region and free side strips, the main region being covered with a layer of positive electrode material, and the side strips extending along a first longitudinal edge and not covered with electrode material.

[0026] i. The anode and cathode are arranged within the electrode diaphragm composite such that the first longitudinal edge of the anode current collector departs from one of the end sides, and the first longitudinal edge of the cathode current collector departs from the other end side.

[0027] j. The battery includes contact elements that are at least partially constructed of metal, the contact elements being in direct contact with a first longitudinal edge, and preferably connected to the longitudinal edge by welding.

[0028] Preferred implementation of electrochemical systems

[0029] In principle, the energy storage battery included in this invention is independent of its electrochemical design. However, in a particularly preferred embodiment, the energy storage battery according to the invention is a lithium-ion battery, especially a secondary lithium-ion battery. Therefore, virtually all electrode materials known for secondary lithium-ion batteries can be used for the anode and cathode of the energy storage battery.

[0030] In the negative electrode of the energy storage battery according to the invention, which is configured as a lithium-ion battery, carbon-based particles, such as graphitic carbon, or preferably non-graphitic carbon materials capable of lithium intercalation, also in particulate form, can be used as the active material. Alternatively or additionally, lithium titanate (Li4Ti5O) may also be included in the negative electrode. 12The negative electrode may contain a compound or alloy of a material having at least one material from the group consisting of silicon, aluminum, tin, and antimony, or a material capable of reversibly inserting and transferring lithium, such as silicon oxide (in combination with a carbon-based active material if necessary), as the active material. Tin, aluminum, antimony, and silicon can form an intermetallic phase with lithium. Here, especially in the case of silicon, the ability to absorb lithium is many times greater than that of graphite or similar materials. Furthermore, the thin anode is also made of metallic silicon.

[0031] For the positive electrode of the energy storage battery according to the invention, which is configured as a lithium-ion battery, lithium-metal oxide compounds and lithium-metal phosphate compounds, such as LiCoO2 and LiFePO4, can be considered as active materials. Furthermore, materials having the chemical formula LiNi are particularly suitable. x Mn y Co z Lithium nickel manganese cobalt oxide (NMC) with O2 (where x+y+z is usually 1), lithium manganese spinel (LMO) with the chemical formula LiMn2O4, or lithium Ni x Co y Al z Lithium nickel cobalt aluminum oxide (NCA) of O2 (where x+y+z is typically 1). Its derivatives, such as those with the chemical formula Li, can also be used. 1.11 (Ni 0.40 Mn 0.39 Co 0.16 Al 0.05 ) 0.89 Lithium nickel manganese cobalt aluminum oxide (NMCA) of O2, or Li 1+x A mixture of MO compounds and / or the aforementioned materials. Preferably, the active material of the cathode is also applied in particulate form.

[0032] Furthermore, the electrodes of the energy storage battery according to the invention, configured as a lithium-ion battery, preferably comprise an electrode binder and / or additives for improving conductivity. The active material is preferably embedded in a matrix composed of the electrode binder, wherein adjacent particles in the matrix are preferably in direct contact with each other. A conductive medium is used to improve the conductivity of the electrodes. Typical electrode binders are, for example, based on polyvinylidene fluoride (PVDF), polyacrylate, or carboxymethyl cellulose. Typical conductive media are carbon black or metal powder.

[0033] The energy storage battery according to the invention preferably includes an electrolyte, and in the case of a lithium-ion battery, particularly an electrolyte based on at least one lithium salt, such as lithium hexafluorophosphate (LiPF6), which is dissolved in an organic solvent (e.g., a mixture of organic carbonates or cyclic ethers such as THF or nitriles). Other usable lithium salts include, for example, lithium tetrafluoroborate (LiBF4), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), lithium bis(fluorosulfonyl)imide (LiFSI), and lithium bis(oxalate)borate (LiBOB).

[0034] Preferred embodiments of the diaphragm

[0035] The electrode diaphragm composite preferably comprises at least one strip-shaped diaphragm, and more particularly preferably two strip-shaped diaphragms, the one or more diaphragms having first and second longitudinal edges and two end members, respectively.

[0036] Preferably, the diaphragm is made of an electrically insulating plastic film. Preferably, the diaphragm can be impregnated with an electrolyte. For this purpose, the plastic film used may, for example, have micropores. The film may be made of, for example, polyolefin or polyetherketone. Nonwoven fabrics and textiles made of plastic materials or other electrically insulating surface structures can also be used as the diaphragm. Preferably, a diaphragm having a thickness in the range of 5 μm to 50 μm is used.

[0037] In several embodiments, the one or more membranes of the complex may also be one or more layers composed of a solid electrolyte.

[0038] Preferred structure of electrode diaphragm composite configured as a wound body

[0039] In an electrode-diaphragm composite configured as a wound body, a strip-shaped anode, a strip-shaped cathode, and one or more strip-shaped diaphragms are preferably present in a helical wound manner. To manufacture the electrode-diaphragm composite, the strip-shaped electrode and the one or more strip-shaped diaphragms are fed together to a winding apparatus and, preferably, wound helically around a winding shaft. In several embodiments, the electrode and diaphragm are wound onto a cylindrical or hollow cylindrical mandrel, which sits on a winding mandrel and remains in the wound body after winding. For example, the wound body sleeve can be constructed from plastic film or tape. Alternatively, the wound body sleeve can be constructed from one or more turns of diaphragm winding.

[0040] Preferred implementation of the current collector

[0041] The current collector of the energy storage battery is used to make electrical contact, as large as possible, with the electrochemically active components contained in the respective electrode materials. Preferably, the current collector is made of metal or at least metallized on its surface. In the case of an energy storage battery according to the invention configured as a lithium-ion battery, copper or nickel, or other conductive materials, especially copper alloys and nickel alloys, or nickel-coated metals, are suitable as materials for the anode current collector. Stainless steel may also be considered in principle. In the case of an energy storage battery according to the invention configured as a lithium-ion battery, aluminum, or other conductive materials, including aluminum alloys, are suitable as metals for the cathode current collector.

[0042] Preferably, the anode current collector and / or the cathode current collector are each metal films having a thickness in the range of 4 μm to 30 μm, especially strip-shaped metal films having a thickness in the range of 4 μm to 30 μm.

[0043] However, in addition to membranes, other strip-shaped substrates, such as metal or metallized nonwoven fabrics, or open-cell metal foams, or metal mesh, can also be used as current collectors.

[0044] The current collector is preferably equipped with corresponding electrode materials on both sides.

[0045] Preferably, the longitudinal edges of the one or more diaphragms form the end sides of an electrode diaphragm composite configured as a wrapped body.

[0046] Furthermore, preferably, the longitudinal edge of the winding body or the edge of the anode current collector and / or cathode current collector, which is away from the end side or the stacked side, extends from the end side or the side with a distance of no more than 5000 μm, preferably no more than 3500 μm.

[0047] Particularly preferably, the edge or longitudinal edge of the anode current collector extends no more than 2500 μm from the side of the stack or the end of the winding, and more preferably no more than 1500 μm. Particularly preferably, the edge or longitudinal edge of the cathode current collector extends no more than 3500 μm from the side of the stack or the end of the winding, and more preferably no more than 2500 μm.

[0048] Solution according to the invention

[0049] The battery's standout features are particularly the following two characteristics: k. and l.

[0050] k. The contact element includes a rounded edge.

[0051] l. The contact element is enclosed in a tubular housing with a circular opening at the end.

[0052] That is, according to the present invention, a contact element with a rounded edge is used as the contact element, and the rounded opening at the end of the tubular housing member is closed by the contact element. Therefore, the contact element serves not only as an electrical contact electrode, but also simultaneously as the housing member. A significant advantage of this is that a separate electrical connection is no longer required between the contact element and the housing member. This creates space within the housing and simplifies battery assembly. Furthermore, the housing member is directly connected to the current collector, giving the battery excellent heat dissipation performance.

[0053] Preferred embodiment of the electrical connection of the contact element / contact element at the electrode diaphragm composite configured as a coil Way

[0054] In the first preferred embodiment of the invention, the energy storage battery is characterized by directly possessing at least one of the following four features a to d:

[0055] a. The contact element is or includes a metal sheet, the edge of which corresponds to or together forms the circular edge of the contact element.

[0056] b. The metal sheet is arranged in the tubular housing such that the edge of the metal sheet abuts against the inside of the tubular housing along the surrounding contact area.

[0057] c. The edges of the metal sheet are connected to the tubular housing component by a surrounding weld.

[0058] d. One of the first longitudinal edges is connected to the metal sheet by welding.

[0059] Especially preferably, all four or more of the features a. to d. just described are implemented in a combination of each other.

[0060] In its simplest embodiment, the metal sheet is a flat plate with a circular perimeter that extends only in a plane. However, in many cases, more complex designs may also be preferred. Thus, the profile of the metal sheet may, for example, have one or more preferably concentrically arranged circular recesses and / or raised portions around its center, which, for example, can create a wavy cross-section. It is also possible for the inner side of the metal sheet to have one or more bridging portions. Furthermore, the metal sheet may have radially inwardly curved edges, resulting in a double-layered edge region, for example, with a U-shaped cross-section.

[0061] The contact element can consist of multiple individual pieces, including metal sheets, which do not necessarily have to be entirely made of metal. In a particularly preferred embodiment, the contact element may, for example, include a distinctively styled metal cap with a circular perimeter, which can be welded to the metal sheet and has a diameter approximately or precisely the same as the metal sheet, such that the edges of the metal sheet and the edges of the cap together form the edge of the contact element. In another embodiment, the edge of the cap may be surrounded by the aforementioned radially inwardly curved edge of the metal sheet. In a preferred embodiment, a press-fit connection may even exist between two individual pieces.

[0062] In order for the edge of the metal sheet to abut against the inner side of the tubular housing along the surrounding contact area, it is preferable that the tubular housing has a circular cross-section, at least in the section where the edge of the metal sheet abuts. Suitably, this section is constructed as a hollow cylinder for this purpose. In this section, the inner diameter of the tubular housing corresponds to the outer diameter of the edge of the contact element, and in particular the outer diameter of the metal sheet.

[0063] Welding the edges of the metal sheet to the tubular housing components can be achieved, in particular, using lasers. Alternatively, the metal sheet can be fixed by brazing or bonding.

[0064] In the case of a circumferential weld, no separate sealing element is required. The sheet metal and the tubular housing are sealed together by the weld. Furthermore, the welded connection also ensures a virtually unobstructed electrical connection between the sheet metal and the tubular housing.

[0065] In the second preferred embodiment of the invention, the energy storage battery is characterized by directly possessing at least one of the following five features a to e:

[0066] a. The contact element is or includes a metal sheet, the edge of which corresponds to or together forms the circular edge of the contact element.

[0067] b. The metal sheet is arranged in the tubular housing such that the edge of the metal sheet abuts against the inside of the tubular housing along the surrounding contact area.

[0068] c. The edges of the metal sheet are connected to the tubular housing component by a surrounding weld.

[0069] d. The contact element comprises a metal contact plate having two sides, one of which faces the direction of the metal sheet and is preferably connected to the metal sheet by welding.

[0070] e. One of the first longitudinal edges is directly abutted against the other side of the contact plate, and is preferably connected to the contact plate by welding.

[0071] Especially preferably, all five or more features a to e just described are implemented in a combination of each other.

[0072] In several aspects, such as within the range of features a. to c., the second preferred embodiment of the invention is no different from the first preferred embodiment. Therefore, it is unnecessary to elaborate on these features separately. Regarding the preferred embodiments of these features, refer to the explanation above in conjunction with the first preferred embodiment.

[0073] Here, the welding of the edge of the metal sheet to the tubular housing component can also be achieved, especially by means of a laser. However, alternatively, the metal sheet can be fixed by brazing or bonding.

[0074] However, unlike the first preferred variant of the invention, according to feature d, in addition to the metal sheet, the contact element also includes a contact plate as another composite, wherein one of the first longitudinal edges is not directly abutted against the metal sheet, but instead directly abutted against the contact plate. The metal sheet is used to enclose the housing, while the contact plate contacts the longitudinal edge of the current collector.

[0075] In a simple implementation, the contact plate is a flat plate extending only in one plane; in other implementations, the contact plate can also be a uniquely styled plate. In particular, it is also possible for the contact plate to have one or more bridging portions or elongated recesses on the side that contacts the longitudinal edge.

[0076] In several preferred embodiments, the contact plate may have a circular perimeter, but this is not mandatory. In some cases, the contact plate may be, for example, a metal strip, or have multiple strip-shaped segments arranged, for example, in a star-like pattern.

[0077] In several embodiments, a contact plate having at least one slot and / or at least one perforation can be used. The at least one slot and / or at least one perforation can be used to overcome deformation of the contact plate when establishing a welded connection with the first longitudinal edge.

[0078] The side of the contact plate facing the metal sheet is preferably constructed such that when the contact plate and the metal sheet are in direct contact, there is a two-dimensional contact surface, that is, the contact plate and the metal sheet overlap each other at least partially flat.

[0079] Preferably, the contact plate and the metal sheet are in rigid contact with each other, and more preferably in rigid direct contact with each other. In this case, the contact plate and the metal sheet are preferably fixed to each other by welding or brazing.

[0080] In a particularly preferred embodiment, the contact plate is constructed as described in WO 2017 / 215900 A1.

[0081] In the third preferred embodiment of the invention, the energy storage battery is characterized by directly possessing at least one of the following six features a to g:

[0082] a. The contact element is or includes a metal sheet, the edge of which corresponds to or together forms the circular edge of the contact element.

[0083] b. The metal sheet is arranged in the tubular housing such that the edge of the metal sheet abuts against the inside of the tubular housing along the surrounding contact area.

[0084] c. The edges of the metal sheet are connected to the tubular housing component by a surrounding weld.

[0085] d. The contact element includes a metal contact plate with two sides, one of which is oriented toward the metal sheet.

[0086] e. The contact element includes a pole pin (108) which is fixed to the contact plate and guided out of the battery casing through a notch in the metal sheet.

[0087] f. The contact element includes at least one insulating element that electrically insulates the pole pin (108) and / or contact plate relative to the metal sheet.

[0088] g. One of the first longitudinal edges is directly abutted against the other side of the contact plate and is preferably connected to the metal plate by welding.

[0089] Especially preferably, all five or more of the features just described a to g are implemented in a combination of each other.

[0090] Regarding several features, for example, within the range of features a. to d., the third preferred inventive variant is no different from the first and second preferred inventive variants. Therefore, it is unnecessary to separately explain these features again. Regarding preferred embodiments of features a. to c., refer to the above explanation in conjunction with the first preferred inventive variant. Regarding preferred embodiments of feature d., particularly concerning possible designs of the contact plate, refer to the above explanation in conjunction with the second preferred inventive variant.

[0091] Here, the welding of the edge of the metal sheet to the tubular housing component can also be achieved, especially by means of a laser. However, alternatively, the metal sheet can be fixed by brazing or bonding.

[0092] However, unlike the second preferred variant, in the third variant, the contact element includes a pole pin as another component. The pole pin is preferably fixed to the contact plate by welding or brazing. The pole pin is electrically insulated relative to the metal sheet by an insulating member, which preferably also provides a sealing function.

[0093] Preferably, the insulating element can be a conventional plastic sealant that is chemically resistant to the electrolyte used. Suitable sealing materials are known to those skilled in the art of primary and secondary accumulator elements. In alternative preferred embodiments, glass, as well as ceramic and glass-ceramic materials, can also be used as the insulating element.

[0094] A feasible preferred embodiment involving welding the longitudinal edges to the contact plate or sheet of the contact element.

[0095] In not only the first, but also in the second or third preferred embodiments of the invention, the longitudinal edge of the current collector is preferably connected to the contact element by welding, in one case directly to the metal sheet of the contact element, and in other cases to the contact plate. Several contact variations are then proposed, according to which the connection of the longitudinal edge at the contact plate or metal sheet can be designed.

[0096] A method for welding the edge of the current collector to the contact element is known from WO 2017 / 215900 A1 or JP 2004-119330 A. This technique achieves particularly high current carrying capacity and low internal resistance. Therefore, the methods for electrically connecting the contact element, especially a disc-shaped contact element, to the edge of the current collector are fully referenced in WO 2017 / 215900 A1 and JP 2004-119330 A.

[0097] Particularly preferably, one of the first longitudinal edges directly abuts the metal sheet or, depending on the situation, the contact plate. This results in a linear contact area, which, in the case of a spirally wound electrode, has a spiral orientation. Preferably, by means of a suitable welding connection, the longitudinal edges of this linear, and preferably spiral, contact area are connected as uniformly as possible at the metal sheet or contact plate. Particularly preferably, this connection can be designed as follows:

[0098] • Contact variation scheme 1: The longitudinal edge of the current collector, which is directly attached to the metal sheet or contact plate, is continuously connected to the metal sheet or contact plate along its entire length by a weld.

[0099] • Contact Variation 2: The longitudinal edge of the current collector, which directly abuts the metal sheet or contact plate, comprises one or more segments, each of which is continuously connected to the metal sheet or contact plate along its entire length by a weld. Particularly preferably, these segments have a minimum length of 5 mm, preferably 10 mm, and particularly preferably 20 mm.

[0100] • Contact variation scheme 3: The longitudinal edge of the current collector, which is directly attached to the metal sheet or contact plate, is connected to the metal sheet or contact plate through multiple point-like welding connections (so-called multi-pin connection).

[0101] Clearly, the second and third contact variations can also be combined with each other.

[0102] In a possible improvement to the second contact variation scheme, the one or more segments that are continuously connected to the metal sheet or contact plate over their entire length extend over at least 25%, preferably at least 50%, and particularly preferably at least 75% of the total length of the respective longitudinal edges.

[0103] Particularly preferably, the metal sheet and / or contact plate are characterized by at least one of the following features a. and b.:

[0104] a. The metal sheet and / or the contact plate used preferably have a thickness in the range of 50 μm to 600 μm, and more preferably in the range of 150 μm to 350 μm.

[0105] b. The metal sheet and / or contact plate are made of alloyed or non-alloyed aluminum, alloyed or non-alloyed titanium, alloyed or non-alloyed nickel, or alloyed or non-alloyed copper, but may also be made of stainless steel (e.g., type 1.4303 or 1.4404) or nickel-plated steel if necessary.

[0106] Especially preferably, features a. and b. described above are implemented in combination with each other.

[0107] If the longitudinal edge directly abutting the metal sheet, or, depending on the circumstances, directly abutting the contact plate, especially if welded there, is the longitudinal edge of the anode current collector, then the anode current collector and the metal sheet, or the anode current collector and the contact plate, are preferably both made of the same or at least chemically related materials, such as copper and copper alloys. In the case of an energy storage battery according to the invention configured as a lithium-ion battery, this material is preferably selected from the group consisting of copper, nickel, titanium, alloys of these three elements, nickel-plated steel, and stainless steel. However, in the case of a lithium titanate anode, the anode current collector and the metal sheet, or the anode current collector and the contact plate, may also be made of aluminum.

[0108] If the longitudinal edge directly abutting the metal sheet, or, depending on the circumstances, directly abutting the contact plate, especially if welded there, is the longitudinal edge of the cathode current collector, then the cathode current collector and the metal sheet, or the cathode current collector and the contact plate, are preferably both made of the same or at least chemically related material, such as aluminum and aluminum alloys. This material is preferably selected from the group consisting of alloyed or non-alloyed aluminum, titanium, titanium alloys, and stainless steel (e.g., type 1.4404).

[0109] If the contact element comprises not only a metal sheet but also a contact plate, then preferably, both the contact plate and the metal sheet are made of the same or at least chemically related material. Also preferably, the contact element is made of the same or chemically related material as the current collector against which it is attached.

[0110] If the metal sheet is combined with the contact plate, in several preferred embodiments the metal sheet is made of stainless steel, such as type 1.4303 or 1.4404.

[0111] Particularly preferred, especially in the embodiments described in the first to third preferred variations of the invention, the energy storage battery is characterized by at least one of the following two features a. and b.:

[0112] a. The tubular housing component includes a central section and a contact section in the axial direction, wherein the winding sleeve is attached to the inner side of the housing component in the central section, and the edge of the metal sheet is attached to the inner side of the housing component in the contact section.

[0113] b. The housing component configured as a tube includes a circular edge that curves radially inward over the edge of the contact element.

[0114] Corresponding to the preferred design of the tubular housing component in the contact area described above, the contact section is preferably constructed as a columnar or, more precisely, a hollow columnar shape. The same design applies to the central section.

[0115] Shell variant with cup-shaped shell component

[0116] In a particularly preferred embodiment of the invention, the energy storage battery is distinguished by at least one of the following additional features a. and b.:

[0117] a. The tubular housing component (101) is a component of the cup-shaped housing component, which includes a circular bottom.

[0118] b. The other of the first longitudinal edges rests directly against the bottom and is preferably connected to the bottom by welding.

[0119] Especially preferably, features a. and b. described above are implemented in combination with each other.

[0120] The use of a cup-shaped housing element in battery casing construction has long been known, for example from WO2017 / 215900A1 mentioned at the beginning. Conversely, it is unknown that, as presented herein, the longitudinal edge of the current collector is directly connected to the bottom of the cup-shaped housing element. This measure also eliminates the need for separate electrical conductors on the bottom side and allows for the use of an axially extended, wound electrode-diaphragm composite, thereby contributing to increased energy density and improved heat dissipation performance of the battery according to the invention.

[0121] Therefore, according to the present invention, it is feasible and preferred that the current collector edges of the positive and negative electrodes, which are separated from the opposing end sides of the electrode-diaphragm composite configured as a winding body, are directly connected to the housing parts, i.e., the bottom of the cup-shaped part and the contact elements used as sealing elements as described above. Thus, the utilization of the internal volume of the battery housing for the active components approaches its theoretical optimality.

[0122] The cup-shaped housing, especially in the area at its bottom, preferably has a thickness similar to that of the metal sheet and / or contact plate of the contact element, i.e., particularly in the range of 50 μm to 600 μm, and preferably in the range of 150 μm to 350 μm.

[0123] Especially when the battery according to the invention is designed as a lithium-ion battery, the choice of material for manufacturing the cup-shaped housing, or at least the bottom of the cup-shaped housing, is related to whether the anode or cathode current collector is connected at the bottom. In principle, the same material as that used to manufacture the current collector itself is preferred. That is, the cup-shaped housing, specifically the bottom of the cup-shaped housing, can be made of the following materials:

[0124] Alloy or non-alloy aluminum, alloy or non-alloy titanium, alloy or non-alloy nickel, alloy or non-alloy copper, stainless steel (e.g., type 1.4303 or 1.4404), and nickel-plated steel.

[0125] Furthermore, the housing can be made of a multi-layered material, such as a layer of steel and a layer of aluminum or copper. In this case, the aluminum or copper layer preferably forms the inner side of the cup-shaped part of the housing, specifically the bottom of the cup-shaped part.

[0126] In principle, it is also feasible, as in the case of contact elements, that there is only an indirect connection between the other longitudinal edge of the first longitudinal edge and the bottom of the cup-shaped part through a contact plate. In this case, there is preferably a welded connection between the longitudinal edge and the contact plate according to one of the three contact variations described above, and the contact plate is preferably connected to the bottom by direct welding. The contact plate is preferably designed as corresponding to the contact element case described above.

[0127] The connection of the other of the first longitudinal edges on the bottom or contact plate essentially follows the same structural principle as the connection of the first longitudinal edge on the contact element. Here, the longitudinal edge preferably also rests directly against the bottom in length, resulting in a linear contact area, which, in the case of a spirally wound electrode, has a spiral orientation. Furthermore, it is also preferable that, by means of a suitable welded connection, the longitudinal edges are connected as evenly as possible on the bottom or contact plate along this linear, and preferably spiral, contact area. Preferably, the connection is designed according to one of the three contact variations described above, or a combination of these contact variations (i.e., for example, a multi-pin connection).

[0128] Shell variant with two caps

[0129] In another particularly preferred embodiment of the invention, the energy storage battery is distinguished by at least one of the three additional features a to c directly described below:

[0130] a. A housing component constructed in a tubular shape has a circular opening at another end.

[0131] b. The battery includes a closure element with a rounded edge that closes the other end opening.

[0132] c. The closure element for the other end opening is or includes a metal sheet, the edge of which corresponds to or forms the circular edge of the metal closure element.

[0133] Especially preferably, features a. and c. described above are implemented in a combination of each other.

[0134] In this embodiment, a tubular housing member, together with a closing element, replaces the cup-shaped housing member. That is, the housing consists of three housing members, one of which is tubular, and the other two (a contact element and a closing element) serve as a cover to close the end openings of the tubular member. This offers advantages in manufacturing technology because, unlike in the case of the cup-shaped housing member, a deep-drawing die is not required to manufacture the tubular housing member. Furthermore, when another member in the first longitudinal edge is directly connected to the closing element, essentially the same advantages are obtained as in the case described above where the connection is made at the bottom of the cup-shaped housing member.

[0135] In this embodiment, the tubular housing is preferably constructed as a column or hollow column. Similar to the contact elements described above, in the simplest embodiment, the closure element is a metal sheet extending only in one plane with a circular perimeter, or alternatively, a distinctive metal sheet, for example, having one or more circular recesses and / or elevations preferably concentrically arranged around its center, which, for example, can create a wave-like cross-section. Also preferably, the inner side of the closure element, especially the metal sheet, may have one or more bridging portions. Furthermore, the closure element, especially the metal sheet, may also have radially inwardly curved edges, so that the closure element or metal sheet has a double-layered edge region, for example, with a U-shaped cross-section.

[0136] In another embodiment, the closure element, especially the metal sheet, may also have an edge that is bent at 90°, so that the edge has an L-shaped cross-section.

[0137] When selecting the material and preferred thickness of the sealing element, especially the metal sheet, the above-described embodiments of the metal sheet for the contact element can also be referenced. The preferred features described above also apply to the sealing element.

[0138] In one improved embodiment of this particularly preferred embodiment, the energy storage battery is characterized by directly possessing at least one of the following features a. to c.:

[0139] a. The metal sheet is arranged in a tubular housing such that the edge of the metal sheet abuts against the inside of the tubular housing along the surrounding contact area.

[0140] b. The edges of the metal sheet are connected to the tubular housing component by a surrounding weld.

[0141] c. The housing component constructed in a tubular shape includes a circular edge that curves radially inward toward the edge of the enclosing element, particularly above the edge of the metal sheet.

[0142] Especially preferably, features a. and b. described above are implemented in combination with each other, and features a. to c. described above are also implemented when necessary.

[0143] Therefore, according to this improved design, it is preferable that the sealing element is fixed in the other end opening by welding. Here, in the case of a circumferential weld, a separate sealing element is also unnecessary.

[0144] Radial bending of the edge of the closure element is an optional measure, which is not required to fix the closure element, but may be suitable nonetheless.

[0145] In one improved embodiment, the energy storage battery according to another particularly preferred embodiment of the invention is distinguished by one of the following features a to c:

[0146] a. The other of the first longitudinal edges is directly abutted against the metal sheet and is preferably connected to the metal sheet by welding.

[0147] b. The other of the first longitudinal edges is welded to the contact plate directly abutting the metal sheet.

[0148] In principle, it is also feasible, as in the case of contact elements, that there exists only an indirect connection between the other longitudinal edge of the first longitudinal edge and the metal sheet or closure element via a contact plate. In this case, a direct welding connection is preferably present between the contact plate and the closure element, especially the metal sheet of the closure element. The contact plate is preferably designed as correspondingly in the case of contact elements described above. Particularly suitable is that the side of the contact plate facing the metal sheet of the closure element is in direct contact with the metal sheet, thereby creating a two-dimensional contact surface, i.e., the contact plate and the metal sheet of the closure element at least partially overlap each other in a flat manner.

[0149] When selecting the material and preferred thickness of the contact plate, the above-described implementation scheme for the contact plate of the contact element can also be referenced. The advantages described above also apply to the contact plate of the sealing element.

[0150] The connection of the other longitudinal edge on the metal sheet or contact plate of the closure element essentially follows the same structural principle as the connection of the first longitudinal edge on the contact element. Here, the longitudinal edge preferably also rests directly against the metal sheet or contact plate in length, resulting in a linear contact area, which, in the case of a spirally wound electrode, has a spiral orientation. Furthermore, it is also preferable that, by means of a suitable welded connection, the longitudinal edges are connected as uniformly as possible along the linear, and preferably spiral, contact area on the metal sheet or contact plate of the closure element. Preferably, the connection is designed according to one of the three contact variations described above, or a combination of these contact variations (i.e., multi-pin connection).

[0151] Preferred design scheme for electrodes

[0152] In the free edge, the metal of the corresponding current collector preferably does not have the corresponding electrode material. In several preferred embodiments, the metal of the corresponding current collector is not covered here, so that the metal can be used, for example, by welding, for electrical contacts.

[0153] In other embodiments, the metal of the corresponding current collector may be coated with a support material in the free strip, or at least partially coated with a support material that is more heat-resistant than the coated current collector and is different from the electrode material disposed on the corresponding current collector.

[0154] Here, "more heat-resistant" should mean that the support material remains in a solid state at the melting temperature of the current collector's metal. That is, the support material either has a higher melting point than the metal, but either sublimates or decomposes only at the temperature at which the metal has already melted.

[0155] The support material that can be used within the scope of this invention can, in principle, be a metal or a metal alloy, provided that the metal or metal alloy has a higher melting point than the metal used on the surface coated with the support material. However, in various embodiments, the distinguishing feature of the energy storage battery according to the invention preferably lies in at least one of the following additional features a. to d.:

[0156] a. The supporting material is a non-metallic material.

[0157] b. The supporting material is an electrically insulating material.

[0158] c. The non-metallic material is a ceramic material, a glass-ceramic material, or glass.

[0159] d. The ceramic material is alumina (Al2O3), titanium dioxide (TiO2), titanium nitride (TiN), titanium aluminum nitride (TiAlN), silicon oxide, especially silicon dioxide (SiO2), or titanium carbonitride (TiCN).

[0160] According to the present invention, the support material is particularly preferably constructed according to feature b, which has just been described above, and is particularly preferably constructed according to feature d, which has just been described above.

[0161] The concept refers to non-metallic materials, especially including plastics, glass, and ceramics.

[0162] The concept of electrically insulating materials should be understood broadly here. In principle, it includes any electrically insulating material, and in particular, also includes the aforementioned plastics.

[0163] The concept of ceramic materials should be understood broadly here. In particular, it should be understood as carbides, nitrides, oxides, silicides, or mixtures and derivatives of these compounds.

[0164] The concept of “glass-ceramic materials” specifically refers to materials that include crystalline particles embedded in an amorphous glass phase.

[0165] The concept of "glass" refers in principle to any inorganic glass that meets the above criteria for thermal stability and is chemically stable relative to the electrolyte that may be present in the battery.

[0166] Particularly preferably, the anode current collector is made of copper or a copper alloy, while the cathode current collector is made of aluminum or an aluminum alloy, and the support material is alumina or titanium oxide.

[0167] Furthermore, it is preferable that the free edges of the anode and / or cathode current collectors are coated with strips made of a support material.

[0168] The main regions of the anode and cathode current collectors, especially the strip-shaped main regions, preferably extend parallel to the respective edges or the longitudinal edges of the current collectors. Preferably, the strip-shaped main regions extend over at least 90%, and more preferably at least 95%, of the area of ​​the anode and cathode current collectors.

[0169] In several preferred embodiments, a support material is applied directly next to the preferred strip-shaped main area in the form of a strip or line; however, this support material does not completely cover the free area, so that the metal of the corresponding current collector is left unsupported directly along the longitudinal edge.

[0170] Other preferred design options for energy storage batteries

[0171] The energy storage battery according to the invention can be a button cell. The button cell is constructed in a cylindrical shape and has a height smaller than its diameter. Preferably, the height is in the range of 4 mm to 15 mm. Furthermore, it is preferred that the button cell has a diameter in the range of 5 mm to 25 mm. Button cells are suitable, for example, for powering small electronic devices such as clocks, hearing aids, and wireless headphones.

[0172] The rated capacitance of the button cell according to the invention, configured as a lithium-ion battery, is typically a maximum of 1500 mAh. Preferably, the rated capacitance is in the range of 100 mAh to 1000 mAh, and particularly preferably in the range of 100 to 800 mAh.

[0173] However, it is particularly preferred that the energy storage battery according to the invention is a cylindrical cell. The cylindrical cell has a height greater than its diameter. The cylindrical cell is especially suitable for applications with high energy demands as described at the beginning, such as in the vehicle field or for use in electric bicycles or power tools.

[0174] Preferably, the height of the energy storage battery configured as a spherical cell is in the range of 15 mm to 150 mm. The diameter of the cylindrical spherical cell is preferably in the range of 10 mm to 60 mm. Within this range, dimensions such as 18 × 65 (diameter multiplied by height in mm) or 21 × 70 (diameter multiplied by height in mm) are particularly preferred. Cylindrical spherical cells with these dimensions are particularly suitable for supplying current to electric drive systems in motor vehicles.

[0175] The rated capacitance of the cylindrical battery according to the invention, constructed as a lithium-ion battery, is preferably up to 90,000 mAh. In embodiments of lithium-ion batteries, with an external dimension of 21 × 70, the battery preferably has a rated capacitance in the range of 1,500 mAh to 7,000 mAh, and more preferably in the range of 3,000 to 5,500 mAh. In embodiments of lithium-ion batteries, with an external dimension of 18 × 65, the battery preferably has a rated capacitance in the range of 1,000 mAh to 5,000 mAh, and more preferably in the range of 2,000 to 4,000 mAh.

[0176] In the European Union, manufacturer data used to specify the rated capacitance of secondary batteries is strictly regulated. Specifically, for example, the rated capacitance data for secondary nickel-cadmium batteries is based on measurements according to standards IEC / EN 61951-1 and IEC / EN 60622; for secondary nickel-metal hydride batteries, it is based on measurements according to standard IEC / EN 61951-2; for secondary lithium batteries, it is based on measurements according to standard IEC / EN 61960; and for secondary lead-acid batteries, it is based on measurements according to standard IEC / EN 61056-1. Any rated capacitance data used in this application is preferably also based on these standards.

[0177] In embodiments of the present invention where the battery is a cylindrical cell, the anode current collector, cathode current collector, and separator are preferably constructed in a strip shape and preferably have the following dimensions:

[0178] - Length in the range of 0.5m to 25m

[0179] - Width in the range of 30mm to 145mm

[0180] In these cases, the free strip extending along the first longitudinal edge and not covered with electrode material preferably has a width of no more than 5000 μm.

[0181] In the case of a cylindrical battery with dimensions of 18×65, the current collector preferably has

[0182] A width of -56mm to 62mm, preferably 60mm, and

[0183] - A length not exceeding 2m, preferably not exceeding 1.5m.

[0184] In the case of a cylindrical battery with dimensions of 21×70, the current collector preferably has

[0185] A width of -56mm to 68mm, preferably 65mm, and

[0186] - A length not exceeding 3m, preferably not exceeding 2.5m.

[0187] A particularly preferred embodiment of the battery according to the present invention

[0188] The following describes a particularly preferred embodiment of the battery according to the present invention. In this particularly preferred embodiment, the battery is characterized by the following features:

[0189] a. The battery comprises an electrode-membrane composite having an anode / separator / cathode sequence, and

[0190] b. The electrode diaphragm composite exists in the form of a cylindrical wound body having two end faces and a wound body sleeve located therebetween, and

[0191] c. The battery includes a casing, the casing comprising a tubular metal casing member made of aluminum or an aluminum alloy, the casing member having a circular opening at one end, and

[0192] d. Within the housing, the electrode diaphragm composite, configured as a wound body, is axially oriented such that the wound body is fitted against the inner side of the housing component configured as a tubular structure, and

[0193] e. The anode is configured as a strip and includes a strip-shaped anode current collector made of nickel or copper, or a nickel alloy or a copper alloy, the anode current collector having a first longitudinal edge and a second longitudinal edge, and two end members, and

[0194] f. The anode current collector includes a strip-shaped main region with a layer of negative electrode material attached, and free side strips extending along a first longitudinal edge without electrode material attached, and

[0195] g. The cathode is configured as a strip and includes a strip-shaped cathode current collector made of aluminum or an aluminum alloy, the cathode current collector having a first longitudinal edge and a second longitudinal edge, and two end members, and

[0196] h. The cathode current collector includes a strip-shaped main region with a layer of positive electrode material attached, and free side strips extending along a first longitudinal edge without electrode material attached, and

[0197] i. The anode and cathode are arranged within the electrode diaphragm composite such that the first longitudinal edge of the anode current collector separates from one of the end faces, and the first longitudinal edge of the cathode current collector separates from the other of the end faces.

[0198] j. The battery includes contact elements, which are enclosed in a tubular housing with a circular opening at one end, and includes a metal sheet, contact plate, metal terminals, and insulating components.

[0199] k. A metal sheet, made of aluminum or an aluminum alloy, has a rounded edge and is arranged in a tubular housing member such that the edge abuts against the inner side of the tubular housing member along a surrounding contact area, wherein the edge of the metal sheet is connected to the tubular housing member by a surrounding weld.

[0200] l. The contact plate is made of nickel or copper, or a nickel alloy or copper alloy, and has two sides, one of which faces the direction of the metal sheet, and the other side is in direct contact with one of the first longitudinal edges and is connected to the longitudinal edge by welding.

[0201] m. The terminal pin is fixed at the contact plate and guided out of the battery casing through a notch in the metal sheet, and

[0202] n. An insulating element that electrically insulates the pins and contact plates relative to the sheet metal.

[0203] The electrode diaphragm composite, including all its components and several other components such as insulation elements and contact elements, has been described in detail above. Reference can be made to the corresponding implementation scheme.

[0204] In addition to the tubular housing components, the metal plates of the contact elements are also an important part of the battery housing according to the invention, and the metal plates close the aforementioned circular opening. All important parts of the battery housing, the tubular metal housing components and the metal plates, are made of aluminum or aluminum alloy.

[0205] Therefore, the particularly preferred embodiment of the battery according to the present invention is preferably a battery having an aluminum casing.

[0206] In a preferred embodiment of the battery according to the invention, a particularly preferred feature is that at least one of the following features a. to d. is directly present:

[0207] a. The pin is fixed to the contact plate by welding.

[0208] b. The pins are constructed in a tubular shape.

[0209] c. The pins are made of nickel or copper, or nickel alloys or copper alloys.

[0210] d. The pins are made of the same material as the contact plate.

[0211] Features a to d can be implemented independently of each other. Preferably, features a and b can be implemented in combination with each other, especially features a to c, and even more preferably features a to d.

[0212] In this regard, the tubular construction of the electrode pin is particularly advantageous because it allows for welding through the electrode pin. This is especially advantageous in the contact plate design described here, where the contact plate is used to contact the edge of the current collector. In this way, the contact plate can first be welded to the end side of the wound electrode diaphragm composite. In the next step, the electrode pin can be welded together with the contact plate, even after the wound composite along with the contact plate has been pushed into the housing. This is explained in detail below:

[0213] In a preferred embodiment of the battery according to the invention, a particularly preferred feature is at least one of the following characteristics a to e:

[0214] a. The pin is constructed in a tubular shape and fixed to the contact plate by welding.

[0215] b. The pin has an end segment made of nickel or copper or a nickel alloy or a copper alloy, or has a sleeve made of nickel or copper or a nickel alloy or a copper alloy, especially coated with nickel or copper or a nickel alloy or a copper alloy.

[0216] c. The end segment, made of nickel or copper or a nickel alloy or copper alloy, or having a sleeve made of nickel or copper or a nickel alloy or copper alloy, is welded to the contact plate.

[0217] d. The pole pin has an end segment made of aluminum or an aluminum alloy, or has a sleeve made of aluminum or an aluminum alloy, especially coated with aluminum or an aluminum alloy.

[0218] e. The end segments, made of aluminum or aluminum alloy or having a sleeve made of aluminum or aluminum alloy, form joint contact points that can be accessed from the outside of the housing.

[0219] In principle, feature groups a to c and feature groups d and e can be implemented independently of each other. That is, preferably, features a to c and d and e are implemented in combination with each other. More preferably, all features a to e are implemented in combination with each other.

[0220] The advantage of this embodiment is that it simplifies the welding of the electrode pins to the contact plate, as similar or identical materials can be welded together. If the end segment is made of, for example, copper, it is particularly easy to weld to a contact plate made of copper. Aluminum segments, on the other hand, ensure problem-free contact from the outside of the battery, especially by welding an aluminum discharger. Through such an aluminum discharger, the electrodes of multiple batteries according to the invention can be interconnected.

[0221] If necessary, the electrolyte can be filled into the casing of the battery according to the invention through tubular electrode pins.

[0222] In a preferred embodiment of the battery according to the invention, a particularly preferred feature is at least one of the following characteristics a to c:

[0223] a. A pin constructed in the shape of a tube includes a closed bottom at one of its ends.

[0224] b. The bottom of the enclosure is made of nickel or copper or a nickel alloy or a copper alloy, or has a sleeve made of nickel or copper or a nickel alloy or a copper alloy, and is part of an end segment made of nickel or copper or a nickel alloy or a copper alloy, or has a sleeve made of nickel or copper or a nickel alloy or a copper alloy.

[0225] c. The bottom is welded to the contact plate.

[0226] Features a to c can be implemented independently of each other. Preferably, features a to c can be implemented in combination.

[0227] In this embodiment, the electrode pin is cup-shaped, including the bottom and surrounding sidewalls. In this embodiment, welding to the contact plate can also be performed over a larger area, for example, through multiple weld points distributed on the bottom. Conversely, when using a tubular electrode pin with an open end, welding can only be performed at the location where the opening of the electrode pin abuts against the contact plate.

[0228] Particularly preferred is that the pole pin, constructed in a tubular shape, has the following dimensions:

[0229] - Height in the range of 1mm to 8mm, preferably in the range of 2mm to 4mm.

[0230] - Outer diameter in the range of 2mm to 12mm, preferably in the range of 3mm to 8mm.

[0231] - The inner diameter is in the range of 1 mm to 10 mm, preferably in the range of 2 mm to 6 mm.

[0232] - Wall thickness in the range of 0.3mm to 2.5mm, preferably in the range of 0.3mm to 1.5mm.

[0233] In cases where the pin has a diameter greater than its height, in embodiments with a bottom, the pin has a bowl-shaped form. In this case, the pin can also be referred to as a pin cup or pin bowl.

[0234] In a preferred embodiment of the battery according to the invention, a particularly preferred feature is at least one of the following features a. and b.:

[0235] a. A tubular housing component is a component of a housing cup-shaped part made of aluminum or aluminum alloy, including a circular bottom.

[0236] b. The other of the first longitudinal edges rests directly against the bottom and is preferably connected to the bottom by welding.

[0237] Preferably, features a. and b. are implemented in combination with each other.

[0238] Thus, particularly preferably, the aluminum casing of the battery according to the invention comprises two important parts: a casing cup-shaped part made of aluminum or aluminum alloy and a metal sheet made of aluminum or aluminum alloy, wherein the bottom of the casing cup-shaped part is also used for direct contact with the longitudinal edge of one of the electrodes, similar to a contact plate welded together with the electrode pin.

[0239] In another preferred improvement, a particularly preferred embodiment of the battery according to the invention is characterized by at least one of the following features a to c:

[0240] a. A housing component constructed in a tubular shape has a circular opening at another end.

[0241] b. The battery includes a closed element made of aluminum or aluminum alloy with rounded edges, which closes the other end opening and forms the bottom of the casing.

[0242] c. The closure element for the other end opening is or comprises a metal sheet made of aluminum or an aluminum alloy, the edge of which corresponds to or forms the circular edge of the metal closure element.

[0243] Features a to c can be implemented independently of each other. Preferably, features a to c are implemented in combination with each other.

[0244] Thus, particularly preferably, the aluminum casing of the battery according to the invention may also consist of three important parts: a casing component made of aluminum or aluminum alloy and configured in a tubular shape; a metal sheet made of aluminum or aluminum alloy through which the electrode pins are guided; and a closure element comprising another metal sheet made of aluminum.

[0245] It should be noted that when aluminum alloy is mentioned within the scope of this application, in the preferred embodiment, aluminum alloy refers to an alloy that comprises more than 75% by weight, preferably more than 85% by weight, especially more than 95% by weight, and particularly preferably more than 98% by weight of aluminum.

[0246] When copper alloys are mentioned within the scope of this application, in a preferred embodiment, a copper alloy refers to an alloy that comprises a share of copper of more than 75% by weight, preferably more than 85% by weight, especially more than 95% by weight, and particularly preferably more than 98% by weight.

[0247] When nickel alloys are mentioned within the scope of this application, in a preferred embodiment, a nickel alloy refers to an alloy that comprises a nickel share of more than 75% by weight, preferably more than 85% by weight, especially more than 95% by weight, and particularly preferably more than 98% by weight.

[0248] Further preferred improvements to the particularly preferred embodiments of the battery according to the invention, as set forth herein, are defined in claims 5, 8 and 9.

[0249] Manufacturing method

[0250] A variation of the method according to the invention for manufacturing an energy storage battery having the described features is characterized by the following steps:

[0251] a. Provides an electrode-diaphragm composite having an anode / diaphragm / cathode sequence, the electrode-diaphragm composite being in the form of a cylindrical wound body having two end sides and a wound body sleeve located therebetween, wherein each electrode has a current collector coated with an electrode material, having a first longitudinal edge and a second longitudinal edge, and two end members, and one of the longitudinal edges exits from one of the end sides.

[0252] b. Provide a housing component configured in a tubular shape, the housing component having a circular opening at one end,

[0253] c. Provide a contact element that is at least partially constructed of metal, the contact element having rounded edges.

[0254] d. Weld the longitudinal edge that exits from the end side to the contact element or the metal assembly of the contact element.

[0255] e. The electrode diaphragm composite, together with the contact element, is pushed into the tubular housing through the circular opening, so that the winding sleeve abuts against the inner side of the tubular housing, and the edge of the contact element abuts against the inner side of the tubular housing along the surrounding contact area.

[0256] f. Secure the edge of the contact element to the inside of the housing component, which is constructed in a tubular shape.

[0257] The steps described do not necessarily have to be performed in the given order. That is, for example, it is possible to swap steps d. and e. in that order.

[0258] Regarding the preferred design of the electrode-diaphragm composite, the housing components and contact elements configured as tubular, and the welding of the longitudinal edges departing from the end sides, reference is made to the above embodiments related to the energy storage battery according to the present invention.

[0259] In a preferred embodiment, the method is further distinguished by at least one of the following steps:

[0260] a. To fix by means of welding, brazing or bonding.

[0261] b. After fixing, bend the edge of the circular opening at the end radially inward onto the edge of the contact element.

[0262] Consistent with the above embodiments of the energy storage battery according to the invention, fixing by means of welding is particularly preferred. Bending of the edges is generally required for sealing or closure. However, this bending can, for example, be used to correct the height of the energy storage battery.

[0263] Furthermore, in a preferred embodiment, the method according to the invention is distinguished by directly using at least one of the following features a. and b.:

[0264] a. Using an electrolyte to wet an electrode-diaphragm composite, wherein the electrolyte is filled through a notch in a contact element or another housing component provided for this purpose.

[0265] b. After filling with electrolyte, the gap is sealed, for example by bonding or welding.

[0266] c. When using overpressure protection, perform sealing.

[0267] Particularly preferably, at least steps a. and b. described above are implemented in combination; in several embodiments, even steps a. to c. described above are implemented.

[0268] To achieve feature c, the notch can be sealed, for example, by welding a plate comprising a burst membrane, a burst cross, or a similar theoretical fracture site, which can break under a defined overvoltage condition in the battery to prevent the battery from exploding.

[0269] A particularly preferred variation of the method according to the invention:

[0270] The distinguishing feature of a preferred variation of the method according to the invention is the combination of the following steps, which is particularly suitable for manufacturing the especially preferred embodiments of the battery according to the invention having an aluminum casing, as described above:

[0271] a. Provides an electrode-diaphragm composite having an anode / diaphragm / cathode sequence, the electrode-diaphragm composite being in the form of a cylindrical wound body having two end sides and a wound body sleeve located therebetween, wherein each electrode has a current collector coated with an electrode material, having a first longitudinal edge and a second longitudinal edge, and two end members, and one of the longitudinal edges exits from one of the end sides, and

[0272] b. Provide a tubular housing made of aluminum or aluminum alloy, the housing having a circular opening at one end, and

[0273] c. Provides a metal sheet made of aluminum or an aluminum alloy, a contact plate made of nickel or copper, or a nickel alloy or a copper alloy, metal poles, and an insulator, wherein the metal sheet, metal poles, and insulator are provided in the form of a pre-assembled cover assembly in which the poles are guided through notches in the metal sheet and electrically insulated relative to the metal sheet by the insulator, and the contact plate is provided separately.

[0274] d. Weld one of the longitudinal edges to the contact plate, and

[0275] e. Through the circular opening, the electrode diaphragm composite, along with the welded contact plate, is pushed into the tubular housing component, thereby causing the winding body to fit against the inner side of the tubular housing component.

[0276] f. Arrange the pre-assembled cover assembly within the tubular housing component such that the edge of the metal sheet abuts against the inner side of the tubular housing component along the surrounding contact area, and the end of the pin contacts the contact plate.

[0277] g. The edges of the metal sheet are secured to the inside of the tubular housing component by circumferential welding, and

[0278] h. Weld the electrode pins to the contact plate.

[0279] In several embodiments of the method, the electrode-diaphragm composite is wetted with electrolyte before the edges of the metal sheet are fixed by welding. However, this can also be done afterwards, for example, by sealing a hole in the metal sheet.

[0280] The edges of the metal sheet are secured to the inside of the tubular housing component via a circumferential weld along its entire length. The goal is a liquid-tight connection between the two housing components.

[0281] It should also be noted that the electrode-diaphragm composite, including all its components and several other components mentioned in the battery specifications, such as insulation elements and metal sheets or contact plates, have already been described in detail above. Corresponding implementation schemes are also available for reference here.

[0282] In an improved embodiment of this particularly preferred variant of the method according to the invention, the method is distinguished by at least one of the following steps a. to c.:

[0283] a. Using an electrolyte to wet an electrode-diaphragm composite, wherein the electrolyte is filled through a notch provided for this purpose in a metal sheet or another housing component.

[0284] b. After filling with electrolyte, the gap is closed, for example by bonding, welding or brazing (14).

[0285] c. When using the overpressure protection unit (120), the unit is sealed.

[0286] As mentioned above, electrolyte can also be filled through electrode pins if necessary. Similarly, as already mentioned, overvoltage protection can be, for example, a rupture membrane or a rupture cross.

[0287] Another improvement to the method set forth herein is defined in claim 11. Attached Figure Description

[0288] Other features and advantages of the invention will become apparent from the claims and the following description of preferred embodiments of the invention in conjunction with the accompanying drawings. Here, individual features may be implemented individually or in combination with each other.

[0289] In the diagram:

[0290] - Figure 1 Different embodiments (cross-sectional views) of the contact elements of the energy storage battery according to the present invention are shown.

[0291] - Figure 2 A partial view (cross-sectional view) of the energy storage battery according to the invention based on the first preferred embodiment described above is shown.

[0292] - Figure 3 A partial view (cross-sectional view) of the energy storage battery according to the invention, based on the second preferred embodiment described above, is shown.

[0293] - Figure 4 A partial view (cross-sectional view) of the energy storage battery according to the invention, based on the third preferred embodiment described above, is shown.

[0294] - Figure 5 Another partial view (cross-sectional view) of the energy storage battery according to the invention based on the third preferred embodiment described above is shown.

[0295] - Figure 6 The diagram illustrates the welding connection (from a top view) used to connect the longitudinal edge of the current collector to the contact plate of the accumulator battery according to the invention.

[0296] - Figure 7 Another preferred embodiment (cross-sectional view) of the energy storage battery according to the third preferred embodiment of the invention described above is shown.

[0297] - Figure 8 It shows what can be used to close according to Figure 4 , Figure 5 and Figure 7 The implementation methods of the battery casing, pre-assembled cover assembly, and contact elements, and

[0298] - Figure 9 An embodiment of the extreme pin, preferably used within the scope of the present invention, is shown. Detailed Implementation

[0299] exist Figure 1 The figures shown are cross-sectional views A to H of different embodiments suitable for sealing the contact element 110 of the energy storage battery 100 according to the present invention. Specifically:

[0300] A is shown here in the simplest embodiment of the contact element 110 according to the invention, namely, a flat metal sheet having a circular periphery that extends only in a plane. The metal sheet may be made of aluminum, for example.

[0301] The contact element 110 shown herein includes a metal sheet 111 and a metal cap 112. The metal sheet 111 and the cap 112 each have a circular perimeter and the same diameter. The metal sheet 111 extends only in a single plane, while the cap 112 has a central arch. These two components 111 and 112 of the contact element 110 are preferably connected by welding (not shown).

[0302] The contact element 110 shown herein (C) comprises a metal sheet 111 and a metal cap 112. The cap 112 is constructed similarly to the cap in (B). However, the edge 111a of the metal sheet 111 is radially inwardly curved, giving the metal sheet 111 a U-shaped cross-section in the edge region. This curved edge 111a surrounds the edge 112a of the cap 112 and thus secures the cap 112 to the metal sheet 111. Furthermore, it is preferable that the metal sheet 111 and the cap 112 are additionally welded together.

[0303] The contact element 110 shown herein includes a metal sheet 111 and a metal contact plate 113. The contact plate 113 rests flat against the metal sheet 111 and is preferably welded to the metal sheet. The metal sheet 111 may be made of stainless steel, for example, and the contact plate 113 may be made of aluminum alloy, for example.

[0304] The contact element 110 shown here consists only of a metal sheet. Unlike the metal sheet shown in A, this metal sheet has a circular recess 111b on its upper side and a raised portion corresponding to the recess on its lower side, i.e., it has a clearly defined outline.

[0305] The contact element 110 shown here consists only of a metal sheet. Unlike the metal sheet shown in A, this metal sheet has radially inwardly rolled edges 111a and therefore has a double-layered edge region.

[0306] The contact element 110 shown here comprises a metal sheet 111 and a metal cap 112, the cap having a central arch. The edge 111a of the metal sheet 111 is radially inwardly curved, giving the metal sheet 111 a U-shaped cross-section in the edge region. The curved edge 111a surrounds the edge 112a of the cap 112 and thus secures the cap 112 to the metal sheet 111. Preferably, the edges 111a and 112a of the metal sheet 111 and the cap 112 are additionally connected to each other by a surrounding weld (not shown). A hole 114 is present in the center of the metal sheet 111, through which a cavity 116 surrounded by the metal sheet 111 and the cap 112 is accessible. An overpressure protection section 120 is integrated in the cap 112, which can disconnect in the event of overpressure in the cavity 116. In its simplest form, the overpressure protection section 120 may be a theoretical fracture point.

[0307] The contact element shown here consists only of a metal sheet 111. This metal sheet has an edge 111a that is bent at 90° and has an L-shaped cross-section.

[0308] The closure element according to the invention, which can be applied to the housing variants with two caps described above, is preferably also designed according to embodiments A to H.

[0309] exist Figure 2 The energy storage battery 100 shown is an example of the first preferred embodiment of the invention described above. The energy storage battery includes... Figure 1 The contact element 110 shown in B has an edge 110a formed by the edges 111a and 112a of a metal sheet 111 and a metal cap 112. The contact element 110, together with a hollow cylindrical metal housing 101, forms the housing of the energy storage battery 100 and closes the end opening of the housing 101. The edge 110a of the contact element abuts against the inner side 101b of the tubular housing 101 along the surrounding contact area and is connected to the tubular housing 101 by a surrounding weld. The edge 101a of the housing 101 curves radially inward over the edge 110a of the contact element 110.

[0310] Within the housing, the helically wound electrode diaphragm composite 104 is axially oriented such that its wound sleeve 104a abuts against the inner side of the tubular housing member 101. The longitudinal edge 115a of the anode current collector exits from the upper end side 104b of the wound electrode diaphragm composite 104. The anode current collector is directly welded to the underside of the metal sheet 111, for example, via a multi-pin connection.

[0311] exist Figure 3 The energy storage battery 100 shown is an example of the second preferred embodiment of the invention described above. The energy storage battery includes... Figure 1 The contact element 110 shown in B has an edge 110a formed by the edges 111a and 112a of the metal sheet 111 and the end cap 112. The contact element 110, together with a hollow cylindrical metal housing 101, forms the housing of the energy storage battery 100 and closes the end opening of the housing 101. The edge 110a of the contact element abuts against the inner side 101b of the tubular housing 101 along the surrounding contact area and is connected to the tubular housing 101 by a surrounding weld. The edge 101a of the housing 101 is radially inwardly curved over the edge 110a of the contact element 110.

[0312] The contact element 110 further includes a metal contact plate 113 having two sides, one of which is oriented toward the metal sheet 111, or even flat against the metal sheet, and is connected to the metal sheet 111 by welding.

[0313] Within the housing, the helically wound electrode diaphragm composite 104 is axially oriented such that its wound sleeve 104a abuts against the inner side of the tubular, metallic housing member 101. The longitudinal edge 115a of the anode current collector exits from the upper end side 104b of the wound electrode diaphragm composite 104. The anode current collector abuts directly against the underside of the contact plate 113 and is welded to the underside of the contact plate 113, for example, via a multi-pin connection.

[0314] exist Figure 4 The energy storage battery 100 shown is an example of the third preferred embodiment of the invention described above. The energy storage battery includes an electrode separator composite 104, which is axially pushed into a housing member 101 configured as a hollow cylinder, such that the wound sleeve 104a of the electrode separator composite abuts against the inner side 101b of the tubular housing member 101. The electrode separator composite 104 includes a helically wound strip-shaped anode and a strip-shaped cathode. The anode includes a strip-shaped anode current collector and a strip-shaped cathode current collector. The anode current collector is coated with a layer composed of a negative electrode material. The cathode current collector is coated with a layer composed of a positive electrode material.

[0315] The longitudinal edge 115a of the anode current collector separates from the upper end side 104b of the electrode diaphragm composite 104, which is configured as a winding. The longitudinal edge 125a of the cathode current collector separates from the lower end side 104c of the electrode diaphragm composite 104, which is configured as a winding.

[0316] The energy storage battery 100 includes a tubular, hollow cylindrical metal housing 101 with two end openings. The upper opening is closed by a metal sheet 111 arranged within the tubular housing 101 such that the edge 111a of the metal sheet abuts against the inner side 101b of the tubular housing 101 along a surrounding contact area. The edge 111a of the metal sheet 111 is connected to the tubular housing 101 by a surrounding weld.

[0317] The metal sheet 111 is a component of the contact element 110. In addition to the metal sheet 111, the contact element also includes a metal contact plate 113 and a terminal pin 108. The metal contact plate 113 has two sides, one of which, in the figure, is located on the upper side facing the metal sheet 111. A longitudinal edge 115a directly abuts against the other side of the contact plate 113, located on the lower side. The longitudinal edge 115a is welded to the contact plate 113. The terminal pin 108 is welded to the contact plate 113 and extends from the housing of the battery 100 through a central notch in the metal sheet 111.

[0318] The contact element 110 further includes an insulator 103 that electrically insulates the electrode pin 108 and, consequently, the contact plate 113 welded to the electrode pin, relative to the metal sheet 111. The lower opening of the housing 101 is closed by a closure element 145. The closure element 145 is a metal sheet whose edge 145a abuts against the inner side 101b of the tubular housing 101 along the surrounding contact area. The edge 145a of the closure element 145 is connected to the tubular housing 101 by a surrounding weld.

[0319] The longitudinal edge 125a of the cathode current collector rests directly against the inner (upper) side of the contact plate 113. The longitudinal edge 125a is connected to the contact plate 113 by welding. Welding can be achieved, for example, by means of a laser passing through the metal sheet of the enclosure element 145.

[0320] exist Figure 5The energy storage battery 100 shown is another example of the third preferred embodiment of the invention described above. The energy storage battery includes an electrode separator composite 104, which is axially pushed into a housing member 101 configured as a hollow cylinder, such that the wound sleeve 104a of the electrode separator composite abuts against the inner side 101b of the tubular housing member 101. The electrode separator composite 104 includes a helically wound strip-shaped anode and a strip-shaped cathode. The anode includes a strip-shaped anode current collector and a strip-shaped cathode current collector. The anode current collector is coated with a layer composed of a negative electrode material. The cathode current collector is coated with a layer composed of a positive electrode material.

[0321] The longitudinal edge 115a of the anode current collector separates from the upper end side 104b of the electrode diaphragm composite 104, which is configured as a winding. The longitudinal edge 125a of the cathode current collector separates from the lower end side 104c of the electrode diaphragm composite 104, which is configured as a winding.

[0322] The energy storage battery 100 includes a tubular, hollow cylindrical metal housing 101. The tubular housing 101 is part of a cup-shaped metal housing 107, which includes a circular bottom 107a. An upper opening in the cup-shaped housing 107 is closed by a metal sheet 111 arranged within the tubular housing 101 such that its edge 111a abuts against the inner side 101b of the tubular housing 101 along a surrounding contact area. The edge 111a of the metal sheet 111 is connected to the tubular housing 101 by a surrounding weld.

[0323] The metal sheet 111 is a component of the contact element 110. In addition to the metal sheet 111, the contact element also includes a metal contact plate 113 and a terminal pin 108. The metal contact plate 113 has two sides, one of which, in the figure, is located on the upper side facing the metal sheet 111. A longitudinal edge 115a directly abuts against the other side of the contact plate 113, located on the lower side. The longitudinal edge 115a is welded to the contact plate 113. The terminal pin 108 is welded to the contact plate 113 and extends from the housing of the battery 100 through a central notch in the metal sheet 111.

[0324] The contact element 100 further includes an insulator 103 that electrically insulates the pole pin 108 and, in turn, the contact plate 113 welded to the pole pin relative to the metal sheet 111.

[0325] The lower end of the cup-shaped housing 107 terminates at a circular bottom 107a. The longitudinal edge 125a of the cathode current collector rests directly against the inner side of the bottom 107a. The longitudinal edge 125a is connected to the bottom 107a by welding. For example, welding can be achieved by means of a laser penetrating the bottom 107a.

[0326] exist Figure 6 The embodiments shown illustrate contact variations for connecting the longitudinal edge of a current collector with a helical structure to a contact plate. Specifically:

[0327] In point A, the longitudinal edge of the current collector is directly abutted against the contact plate and connected to the contact plate through multiple point-to-point welding connections (so-called multi-pin connection).

[0328] B Here, the longitudinal edge of the current collector, which is directly attached to the contact plate, is fixed to the contact plate by multiple sections that are continuously connected to the contact plate by welds along their entire length.

[0329] exist Figure 7 The energy storage battery 100 shown includes a hollow cylindrical housing 101, which is part of a cup-shaped housing 107. The cup-shaped housing includes a circular bottom 107a and a circular opening (defined by an edge 101a). The cup-shaped housing 107 is a drawn part. The cup-shaped housing 107 surrounds an inner cavity 137 together with a contact element 110, which includes a flat metal sheet 111 with a circular edge 111a in which an electrode separator composite 104 configured as a coil is axially oriented. The metal sheet 111 is arranged in the tubular housing 101 such that the edge 111a of the metal sheet abuts against the inner side 101b of the tubular housing 101 along the surrounding contact area. The edge 111a of the metal sheet corresponds to the edge of the contact element and is connected to the tubular housing 101 by a surrounding weld. The edge 101a of the housing member 101, which is configured as a tube, is bent radially inward (about 90° here) onto the edge 110a of the contact element 110.

[0330] The electrode-diaphragm composite 104 exists in the form of a cylindrical wound body with two end sides, the wound body extending between the two end sides and abutting against the inner side of the housing member 101, which is configured as a hollow cylinder. The wound body is formed by positive and negative electrodes, each configured as a strip and spirally wound, and diaphragms 118 and 119. The two end sides of the electrode-diaphragm composite 104 are formed by the longitudinal edges of diaphragms 118 and 119. Current collectors 115 and 125 extend from the end sides. The corresponding extensions are shown as d1 and d2.

[0331] The anode current collector 115 exits from the upper end side of the electrode diaphragm composite 104, and the cathode current collector 125 exits from the lower end side. In the strip-shaped main region, the anode current collector 115 is coated with a layer composed of negative electrode material 155. In the strip-shaped main region, the cathode current collector 125 is coated with a layer composed of positive electrode material 123. The anode current collector 115 has a side strip 117 extending along the longitudinal edge 115a of the anode current collector and is not coated with anode material 155. Instead, a coating 165 composed of ceramic support material is applied here, which stabilizes the current collector in this region. The cathode current collector 125 has a side strip 121 extending along the longitudinal edge 125a of the cathode current collector and is not coated with cathode material 123. Instead, a coating 165 composed of ceramic support material is also applied here.

[0332] In addition to the metal sheet 111, the contact element 110 further includes a contact plate 113 and an electrode pin 108. The metal contact plate 113 has two sides, one of which, in the figure, is located on the upper side facing the metal sheet 111. On the other side of the contact plate 113, the lower side, a longitudinal edge 115a is in direct contact with the contact plate 113 along its entire length, and thereby in direct contact with the contact element 110, and preferably is connected to the contact element by welding at least through multiple sections along its entire length. Alternatively, a multi-pin connection as described above may be present. Thus, the contact element 110 serves simultaneously as an electrical contact for the anode and as a housing component.

[0333] The electrode pin 108 is welded to the contact plate 113 and extends from the housing of the battery 100 through a central notch in the metal sheet 111. The contact element 110 further includes an insulator 103 that electrically insulates the electrode pin 108 and, consequently, the contact plate 113 welded to it, relative to the metal sheet 111. Only the metal sheet 111 is in direct and electrical contact with the housing cup-shaped member 107. The electrode pin 108 and the contact plate 113 are insulated relative to the housing cup-shaped member.

[0334] The edge 125a of the cathode current collector 125 is in direct contact with the bottom 107a along its entire length, and is preferably connected to the bottom by welding (especially by means of a laser) through at least several sections along its entire length. Alternatively, a multi-pin connection as described above may also be present. Thus, the bottom 107a serves not only as part of the housing but also as the electrical contact for the cathode.

[0335] exist Figure 8 The diagram shows the method for closing according to Figure 4 , Figure 5 and Figure 7The battery casing has contact elements 110. The contact elements include a metal sheet 111, a contact plate 113, metal terminal pins 108, and an insulating member 103. For assembly according to... Figure 4 , Figure 5 and Figure 7 The battery preferably has a separately provided contact plate 113 welded to a longitudinal edge 115a. After the electrode separator composite 104, together with the welded contact plate 113, is pushed into the housing 101, a pre-assembled cover assembly 122 is arranged in the housing 101 such that the edge of the metal sheet 111 abuts against the inside of the housing 101 along the surrounding contact area and one end of the electrode pin 108 contacts the contact plate 113. The edge of the metal sheet 111 can then be welded to the inside of the housing 101, and the electrode pin 108 can be welded to the contact plate 113. The welding of the electrode pin 108 is simplified by the electrode pin being constructed in a tubular shape. For this purpose, the electrode pin 108 has a central notch 108d.

[0336] exist Figure 9 A preferred embodiment of the electrode pin 108 is shown. The electrode pin 108 is configured as a tube and has an end segment 108a, which is made of nickel or copper, or a nickel alloy or copper alloy, or has a sleeve made of nickel or copper, or a nickel alloy or copper alloy, for example, coated with nickel or copper, or a nickel alloy or copper alloy. Another end segment 108b of the electrode pin 108 is made of aluminum or an aluminum alloy or has a sleeve made of aluminum or an aluminum alloy, i.e., coated with aluminum or an aluminum alloy, for example. In particular, when the contact plate 113 is made of the same material as the segment 108a, the segment 108a can be easily welded to the contact plate 113. When the battery is assembled, the end segment 108b forms a connecting contact point that can be accessed from the outside of the housing. In particular, the end segment 108b is easily welded to a discharger made of aluminum or an aluminum alloy.

[0337] and Figure 8 The extreme pins shown in the image are different, in Figure 9 The pole pin 108 shown includes a closed bottom 108c. This bottom is part of the end segment 108a and is also made of nickel or copper, or a nickel alloy or copper alloy, or has a sleeve made of said nickel or copper, or a nickel alloy or copper alloy. The bottom 108c can be welded to the contact plate 113 in a particularly simple manner.

Claims

1. An energy storage battery (100) having the following characteristics: a. The battery includes an electrode-membrane composite (104) having an anode / membrane / cathode sequence. b. The electrode diaphragm composite (104) exists in the form of a cylindrical winding, the winding having two end sides (104b, 104c) and a winding sleeve (104a) located therebetween. c. The battery includes a housing comprising a metallic, tubular housing element (101) made of aluminum or an aluminum alloy and having a circular opening at the end (101c). d. In the housing, the electrode diaphragm composite (104), configured as a winding, is axially oriented such that the winding sleeve (104a) abuts against the inner side (101b) of the tubular housing member (101). e. The anode is configured in a strip shape and includes a strip-shaped anode current collector (115), the anode current collector being made of nickel or copper or a nickel alloy or a copper alloy and having a first longitudinal edge (115a) and a second longitudinal edge as well as two end members. f. The anode current collector (115) includes a strip-shaped main region and a free first side strip (117), the main region being covered with a layer made of negative electrode material (155), the first side strip extending along a first longitudinal edge (115a) of the anode current collector and not covered with the negative electrode material (155). g. The cathode is configured in a strip shape and includes a strip-shaped cathode current collector (125), the cathode current collector being made of aluminum or an aluminum alloy and having a first longitudinal edge (125a) and a second longitudinal edge as well as two end members. h. The cathode current collector (125) includes a strip-shaped main region and a free second strip (121), the main region being covered with a layer made of positive electrode material (123), and the second strip extending along a first longitudinal edge (125a) of the cathode current collector and not covered with the positive electrode material (123). i. The anode and the cathode are arranged within the electrode diaphragm composite (104) such that the first longitudinal edge (115a) of the anode current collector exits from one of the end ends (104b, 104c), and the first longitudinal edge (125a) of the cathode current collector exits from the other end end (104b, 104c). j. The battery includes a contact element (110) that closes the end circular opening (101c) of the tubular housing (101) and includes a metal sheet (111), a contact plate (113), metal electrode pins (108), and an insulating element (103). k. The metal sheet (111) is made of aluminum or an aluminum alloy, has a circular first edge (111a), and is arranged in the tubular housing member (101) such that the first edge (111a) abuts against the inner side (101b) of the tubular housing member (101) along the surrounding contact area, wherein, The first edge (111a) of the metal sheet (111) is connected to the tubular housing member (101) by a surrounding weld. l. The contact plate (113) is made of nickel or copper or a nickel alloy or a copper alloy, and the contact plate has two sides, one of which faces the direction of the metal sheet (111), and the other side is in direct contact with one of the first longitudinal edges (115a, 125a) and is connected to the first longitudinal edge by welding. m. The electrode pin (108) is fixed at the contact plate (113) and guided out of the battery casing through a notch in the metal sheet (111). n. The insulating element (103) electrically insulates the pole pin (108) and the contact plate (113) relative to the metal sheet (111), and o. The pin (108) is configured in a tubular shape and is fixed to the contact plate (113) by welding.

2. The battery according to claim 1, wherein it has at least one of the following additional features: a. The pin (108) is made of nickel or copper, or a nickel alloy or a copper alloy. b. The pin (108) is made of the same material as the contact plate (113).

3. The battery according to claim 1, wherein it has one of the following additional features: a. The pin (108) has a first end segment (108a) made of nickel or copper or a nickel alloy or a copper alloy, or has a sleeve made of nickel or copper or a nickel alloy or a copper alloy. b. The first end segment (108a) is welded to the contact plate (113). c. The pin (108) has a second end segment (108b) made of aluminum or an aluminum alloy, or has a sleeve made of aluminum or an aluminum alloy. d. The second end segment (108b) forms a connecting contact point that can be contacted from the outside of the housing.

4. The battery according to claim 3, wherein it has one of the following additional features: a. The first terminal segment (108a) is coated with nickel or copper, or a nickel alloy or a copper alloy. b. The second terminal segment (108b) is coated with aluminum or an aluminum alloy.

5. The battery according to any one of claims 3 to 4, wherein it has at least one of the following additional features: a. The pole pin (108), which is configured as a tube, includes a closed first bottom (108c) at one of its ends. b. The closed first bottom (108c) is part of the first end segment (108a) and is made of nickel or copper or a nickel alloy or copper alloy, or has a sleeve made of nickel or copper or a nickel alloy or copper alloy. c. The first bottom (108c) is welded to the contact plate (113).

6. The battery according to any one of claims 2 to 4, wherein it has one of the following additional features: a. The housing component (101), configured as a tube, includes a central section (130) and a contact section (135) in the axial direction, in which the winding sleeve (104a) abuts against its inner side (101b), and in the contact section, the first edge (111a) of the metal sheet (111) abuts against its inner side (101b). b. The tubular housing (101) includes a circular second edge (101a) that curves radially inward over the third edge (110a) of the contact element (110).

7. The battery according to any one of claims 1-4, wherein it has at least one of the following additional features: a. The tubular housing member (101) is part of the cup-shaped housing member (107), which includes a circular second bottom (107a) and is made of aluminum or an aluminum alloy. b. Another first longitudinal edge of the first longitudinal edge (115a, 125a) directly abuts against the second bottom (107a).

8. The battery according to claim 7, further comprising the following additional features: When the other first longitudinal edge is directly abutted against the second bottom (107a), it is connected to the second bottom (107a) by welding.

9. The battery according to any one of claims 1 to 4, wherein it has at least one of the following additional features: a. The housing component (101), constructed in a tubular shape, has another circular opening at one end. b. The energy storage battery (100) includes a sealing element (145) made of aluminum or an aluminum alloy and having a circular fourth edge (145a), the sealing element closing the other end opening and forming the bottom of the casing. c. The closure element (145) for the other end opening is or comprises a metal sheet made of aluminum or an aluminum alloy, the edge of which corresponds to or forms the edge of the circular fourth edge (145a) of the metal closure element (145).

10. The battery according to claim 9, wherein it has at least one of the following additional features: a. The metal sheet is arranged in the tubular housing member such that the edge of the metal sheet abuts against the inner side (101b) of the tubular housing member (101) along the surrounding contact area. b. The edge of the metal sheet is connected to the tubular housing component (101) by a surrounding weld. c. The housing element (101) configured as a tube includes a circular second edge (101a) that is radially curved inward to the fourth edge (145a) of the closure element (145).

11. The battery according to claim 10, further comprising the following additional features: The second edge bends radially inward over the edge of the metal sheet.

12. The battery according to claim 10, wherein it has one of the following additional features: a. One of the first longitudinal edges (115a, 125a) directly abuts the metal sheet. b. Another first longitudinal edge of the first longitudinal edge (115a, 125a) is welded to a contact plate (113) made of aluminum or aluminum alloy, which is directly attached to the metal sheet forming the bottom of the housing.

13. The battery according to claim 12, further comprising the following additional features: When the other first longitudinal edge is directly abutted against the metal sheet, it is connected to the metal sheet by welding.

14. A method for manufacturing an energy storage battery (100) according to any one of the preceding claims, comprising the following steps: a. An electrode-diaphragm composite (104) having an anode / diaphragm / cathode sequence is provided, the electrode-diaphragm composite being in the form of a cylindrical wound body having two end sides (104b, 104c) and a wound body sleeve (104a) located therebetween, wherein each electrode has a current collector (115, 125) coated with an electrode material, the current collector having a first longitudinal edge (115a, 125a) and a second longitudinal edge and two end members, and one of the first longitudinal edges (115a, 125a) exits from one of the end sides (104b, 104c). b. Provide a housing component (101) made of aluminum or aluminum alloy and configured in a tubular shape, the housing component having an inner side (101b) and a circular opening at the end (101c). c. A metal sheet (111) made of aluminum or an aluminum alloy, a contact plate (113) made of nickel or copper or a nickel alloy or a copper alloy, a metal pole (108), and an insulating element (103) are provided, wherein the metal sheet (111), the metal pole (108), and the insulating element (103) are provided in the form of a pre-assembled cover assembly (122), in which the pole (108) is guided through a notch in the metal sheet (111) and electrically insulated relative to the metal sheet by the insulating element (103), and the contact plate (113) is provided separately. d. Weld one of the first longitudinal edges (115a, 125a) to the contact plate (113). e. Through the circular opening (101c), the electrode diaphragm composite (104), together with the welded contact plate (113), is pushed into the tubular housing (101), such that the winding sleeve (104a) abuts against the inner side (101b) of the tubular housing (101), and f. The pre-assembled cover assembly (122) is arranged in the tubular housing member (101) such that the first edge (111a) of the metal sheet (111) abuts against the inner side (101b) of the tubular housing member (101) along the surrounding contact area, and the end of the pole pin (108) contacts the contact plate (113), and g. The first edge (111a) of the metal sheet (111) is fixed to the inner side (101b) of the tubular housing member (101) by a circumferential weld, and h. Weld the pole pin (108) to the contact plate (113).

15. The method according to claim 14, characterized in that... The following additional steps: a. Bend the second edge (101a) of the end circular opening (101c) radially inward onto the first edge (111a) of the metal sheet (111).

16. The method according to any one of claims 14 to 15, characterized in that... At least one of the following additional steps: a. The electrode-diaphragm composite (104) is wetted with an electrolyte, wherein the electrolyte is filled by a notch (114) provided for this purpose in the metal sheet (111) or another housing component. b. After filling the electrolyte, seal the notch (114). c. When using the overpressure protection unit (120), perform the sealing.

17. The method according to claim 16, characterized in that... The following additional steps: After the electrolyte is filled, the gap (114) is closed by bonding, welding or brazing.

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