Abstract: An electrochemical element having a winding electrode set comprises a strip positive electrode, a strip negative electrode and a strip separator which is located between them, which are wound up in a spiral to form an electrode winding. The electrochemical element has a cylindrical housing for holding the electrode winding, and a sealed cell pole which is isolated from the housing. The physical distance between the edge of at least one winding electrode and one pole is bridged by a current collector with spring elements. The current collector provides the connection between the electrode and one pole. The spring elements can be conductively connected to collector disks, to the cover and to the bottom of a cup of the electrochemical element.

Abstract: An electrochemical element having a winding electrode set comprises a strip positive electrode, a strip negative electrode and a strip separator which is located between them, which are wound up in a spiral to form an electrode winding. The electrochemical element has a cylindrical housing for holding the electrode winding, and a sealed cell pole which is isolated from the housing. The physical distance between the edge of at least one winding electrode and one pole is bridged by a current collector with spring elements. The current collector provides the connection between the electrode and one pole. The spring elements can be conductively connected to collector disks, to the cover and to the bottom of a cup of the electrochemical element.

Abstract: In a method for determining the state of charge of rechargeable batteries by integration of the amounts of current flowing during charging and discharging, a first state of charge value LZA is determined by continuous integration of the rechargeable battery current. A second state of charge value LZB is determined by measurement of the no-load voltage U0 after receiving or supplying a defined amount of charge Q which is sufficient in order to leave the region of the mixed potential of the electrodes and to reach a no-load voltage of the rechargeable battery, and by comparison of this measured no-load voltage U0 with empirically determined no-load voltage characteristics for the rechargeable battery.

Abstract: A rechargeable battery includes a number of electrochemical storage cells arranged in a common battery box, with intermediate spaces, which are in the form of columns and are provided between the storage cells, for a cooling medium. The battery box has a number of side inlet openings located one above the other, for the cooling medium. The side inlet openings have different areas or are at different distances from one another. The battery box has side inlet openings on at least two opposite sides, and air is used as the cooling medium.

Abstract: A sealed rechargeable battery with sets of wound electrodes arranged in a housing, wherein the housing has at least two main chambers separated by a cell separating wall and in each of which there are located at least two electrode coils. The electrode coils within the main chambers are connected in parallel and the storage elements formed in the main chambers are electrically connected in series. The positive poles of the electrode coils in one main chamber point in one direction and in the neighbouring main chamber they point in the opposite direction. The positive or negative electrodes of the electrode coils in one of the main chambers are respectively connected by a contact disk, which are provided with pole posts, and the opposite poles of all the cells are electrically connected in series by a contact disk connecting all the cells.

Abstract: A galvanic element including at least one positive electrode in strip form, at least one negative electrode in strip form, at least one separator in strip form interposed between the positive and negative electrodes such that the separator and the electrodes are spirally rolled, and at least one disk-shaped current collector connected mechanically and electrically conductively to an edge portion of at least one of the electrodes, the current collector having more than one contact tab.

Abstract: A method for producing a secondary lithium cell which has at least one lithium-cycling negative electrode, at least one lithium-intercalating positive electrode, at least one separator disposed between the positive and the negative electrode, and a nonaqueous lithium ion-conducting electrolyte. The method is carried out by the electrodes and/or the separator being coated, by means of electrostatic powder coating, with wax particles which are insoluble in the electrolyte and have a melting temperature of from about 50 to about 150 ° C. and a mean particle size of from about 6 to about 20 &mgr;m, the amount of wax being between about 0.5 and about 2.5 mg/cm2 of electrode area.

Abstract: The invention relates to negative electrodes for high-energy lithium-ion batteries, which contain Li—Me oxide with Me═Mn, Cr, Ni or Co as active cathode material, and to their production. The electrode composition contains a latex additive based on an acrylic acid derivative copolymer and a polymer binder containing butadiene units. The electrodes are produced by dispersing the carbon black, homogenized with the latex additive, in a solvent and mixing it with the graphite, and by stirring it to form a homogeneous composition, and not incorporating the polymer binder and applying the electrode composition thus obtained to the support substrate until the final stage.

Abstract: In a method for monitoring the charging of gastight alkaline rechargeable batteries, the characteristics of the critical charging voltage (Ucrit) on a rechargeable battery are determined as a function of the charging current (I) for various temperatures (T) and are linearized by means of a function in the form A(I)×T+B(I). The value pairs A and B are stored as parameter arrays in a battery management system, and during operation of a physically identical rechargeable battery which is to be monitored, the associated critical charging voltage is calculated by measuring the temperature and charging current and is used to control the charging of the rechargeable battery. On reaching the critical charging voltage (Ucrit) which corresponds to the critical state of charge (LZcrit), the value of the critical state of charge can be calculated by measuring the current (I) and temperature (T).

Abstract: A Ni/metal hydride secondary element having a positive nickel hydroxide electrode, a negative electrode which contains a hydrogen storage alloy, and an alkaline electrolyte, wherein the positive electrode, which is provided with a three-dimensional metallic conductive structure, also contains a nickel hydroxide whose grains are coated with discrete particles composed of metallic copper. The mass of the copper coating is about 0.2 to about 15 % by weight, preferably about 5 to about 10% by weight, of the mass of nickel hydroxide. The nickel hydroxide material coating is produced by non-electrical chemical deposition in an alkaline environment.

Abstract: A Ni/metal hydride secondary element having a positive nickel hydroxide electrode, a negative electrode having a hydrogen storage alloy, and an alkaline electrolyte, the positive electrode, provided with a three-dimensional metallic conductive structure, also contains an aluminum compound which is soluble in the electrolyte, in addition to nickel hydroxide and cobalt oxide. The aluminum compound is aluminum hydroxide and/or aluminum oxide, and the mass of the aluminum compound which is present in the positive bulk material mixture is 0.1 to 2 % by weight relative to the mass of the nickel hydroxide which is present. In combination with aluminum hydroxide or aluminum oxide, the positive electrode further contains lanthanoid oxidic compounds Y2O3, La2O3 and Ca(OH)2, as well as mixtures of these compounds.

Abstract: In a method for monitoring the charging of gastight alkaline rechargeable batteries, the characteristics of the critical charging voltage (Ucrit) on a rechargeable battery are determined as a function of the charging current (I) for various temperatures (T) and are linearized by means of a function in the form A(I)×T+B(I). The value pairs A and B are stored as parameter arrays in a battery management system, and during operation of a physically identical rechargeable battery which is to be monitored, the associated critical charging voltage is calculated by measuring the temperature and charging current and is used to control the charging of the rechargeable battery. On reaching the critical charging voltage (Ucrit) which corresponds to the critical state of charge (LZcrit), the value of the critical state of charge can be calculated by measuring the current (I) and temperature (T).

Abstract: Secondary lithium-ion cells which include at least one lithium-intercalating, carbon-containing negative electrode, a nonaqueous lithium ion-conducting electrolyte and at least one lithium-intercalating positive electrode including a lithium-containing chalcogen compound of a transition metal, the electrodes being separated from one another by separators. A lithium-containing auxiliary electrode is disposed in the cell to compensate for the irreversible capacity loss in the secondary lithium-ion cell.

Abstract: The invention relates to a process for the preparation of ternary lithium spinels, and to ternary lithium spinels of the general formula LiaMebMn2−bOc. The invention is achieved in accordance with the invention by a process which comprises dissolving a manganese salt in water, adding an oxidant, adding the mixture to an aqueous lithium hydroxide solution containing from 0.1 to 1 % by weight, based on the content of LiOH employed, of seed crystals selected from the group consisting of activated carbon, Aerosil and spine, and separating off, washing and heating the precipitate.