EP2301096A1 - Verbessertes elektrochemisches speicherelement - Google Patents
Verbessertes elektrochemisches speicherelementInfo
- Publication number
- EP2301096A1 EP2301096A1 EP09780315A EP09780315A EP2301096A1 EP 2301096 A1 EP2301096 A1 EP 2301096A1 EP 09780315 A EP09780315 A EP 09780315A EP 09780315 A EP09780315 A EP 09780315A EP 2301096 A1 EP2301096 A1 EP 2301096A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cells
- cell
- cathode
- anode
- electrochemical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0436—Small-sized flat cells or batteries for portable equipment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/562—Terminals characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/42—Grouping of primary cells into batteries
- H01M6/46—Grouping of primary cells into batteries of flat cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
Definitions
- the invention relates to an improved electrochemical device for storage and delivery of electrical energy.
- building or storage elements are generally known in the form of batteries and accumulators in various sizes and types for a variety of purposes.
- the present invention relates to flat batteries and accumulators consisting of foil-like layers, in particular lithium-ion cells and lithium-polymer cells. In both cases, films serve as the starting material for the electrodes and the separator, which separates the electrodes from each other.
- the films are usually processed into a multilayer winding body and pressed into a solid metal housing. In this then the liquid electrolyte is added and then hermetically sealed the battery case.
- Polymer cells are flat cells, also called prismatic cells.
- the electrode films are typically stacked and intimately connected under pressure and possibly temperature or by bonding.
- the battery body is placed in a metallized plastic film that performs a housing function, filled with electrolyte and then sealed by sealing the Gerissausefolienberandung. In the interior of the housing film, a vacuum is set at the final closure.
- the electrolyte in this cell type is incorporated in the battery body into micropores present in the electrode and separator structure or absorbed and immobilized in the layers by gelation of the polymer binder.
- the electrodes are connected to current dissipating structures, so-called current collectors. These are used to conduct electrons from the electrodes to contacts or from the contacts to the electrodes.
- the contacts connect the housing piercing its interior with the environment and serve the electrical AnAuthleiter of the cells at the respective periphery.
- the contacts are also referred to as terminal lugs or housing feedthroughs.
- As a contact through the housing is used for each electrode, for example, a flat metal strip which is welded into the sealed seam so that the package is hermetically sealed.
- the electrodes and possibly the current collectors are planar structures in which an essentially bidirectional and no unidirectional electron transport is present.
- the housing feedthroughs or terminal lugs are structures of substantially one-dimensional shape (eg in the form of flat contact lugs or wires). They form an electrical conductor in which a current flow directed in an axial direction occurs. In this case, according to the principle of Maxwell for a current-carrying conductor during charging or discharging a cell around the housing feedthroughs or terminal lugs around magnetic fields.
- magnetic field measuring devices in particular a portable, network-independent measuring device for measuring earth magnetic field disturbances, may be mentioned, as used for finding spilled objects in archeology. It is a common measurement method in archeology to search for spilled objects through the least disturbances in the earth's magnetic field.
- the requirements in such measuring instruments for a minimum operational stray field are obviously extremely high, since disturbances down to one ten-thousandth of the earth's magnetic field must be detected.
- the requirement for the stray field that emanates from the measuring device under operating conditions itself is at most of the same order of magnitude.
- the invention is based on the invention to provide an electrochemical device for storing and emitting electrical energy, which is particularly suitable for magnetic field sensitive applications and from which only the lowest possible magnetic field emanates.
- the solution to this problem consists in an electrochemical component or storage element for storing and emitting electrical energy with at least two electrochemical cells, each cell having a sheet-like cathode, a sheet-like anode, a sheet-like separator, one with the Cathode-connected cathode current collector and connected to the anode anode current collector, wherein the cathode and the anode current collector are each connected to a terminal lug, and wherein the cells are arranged such that a connected to the cathode current collector terminal lug of a cell relative to one with the anode current collector connected terminal lug of a neighboring cell is positioned so that the magnetic fields generated by moving electrical charges in the terminal lugs superimpose and substantially compensate.
- these cells In one or more of these cells, of course, a plurality of anodes and cathodes, each separated by a separator, stacked one above the other, as known from the prior art. Their current collectors are still brought together within the cells to a single cathode current collector and a single anode current collector, which are connected to the respective terminal lug.
- An electrochemical device or storage element according to the invention may be a battery or an accumulator and is formed by using primary or secondary cells. It is characterized by a nearly complete or at least as far as possible compensation of magnetic fields arising due to a shift in electrical charges. As a result of the extensive compensation of magnetic fields generated by moving charges, the component according to the invention is always surrounded by a magnetic field which has already been minimized even in the near range (that is to say approximately in the region of a few centimeters). When used in a context of magnetic field sensitive applications, charge flow dependent variations of the magnetic field are reduced or prevented. The possibly remaining largely constant magnetic field can advantageously be easily compensated metrologically.
- the cells of the construction or storage element are preferably arranged directly or indirectly adjacent to each other, in particular so that in each case the terminal lugs of the cells are arranged with different polarity directly or indirectly adjacent and / or close to each other.
- Particularly advantageous are a parallel, preferably superimposed arrangement of the terminal lugs and their adjoining arrangement, wherein the terminal lugs are electrically isolated from each other. The closer the terminal lugs are to each other, the more completely do they compensate for the surrounding magnetic fields. The insulation is therefore particularly thin.
- the proposed arrangement of adjacent cells to one another causes that occurring during charging and / or discharging shifts electrical charges lead to any formation of outward magnetic stray fields or only to those with a low impact.
- Affected by the formation of a magnetic stray field is basically any current-conducting, ie charge-shifting structure of the electrochemical device.
- the electrodes themselves, however, due to their function, simultaneously opposite electron and ion currents occur, so that magnetic field compensation occurs.
- the current collectors the magnetic field generated due to charge shift is compensated for, since the current flow direction of the anode current collector is always directed counter to that of the cathode current collector and the current collectors are usually arranged very close to one another due to the planar formation of electrodes and separator that the magnetic fields almost completely overlap.
- Flat in this sense are flat, in particular flat or curved shapes and / or those with little compared to their length and width strength to understand.
- the electrical feedthroughs through the housing (terminal lugs) and the connection of the battery or accumulator to the system environment remain critical with regard to the development of stray magnetic fields.
- these components form a conductor in the sense of Maxwell's laws with a structure that allows a substantially one-dimensional, in a spatial direction directed charge shift.
- the cells of the component or storage element are preferably lithium-ion or lithium-polymer cells.
- the number of cells of the device according to the invention is at least two. With particular advantage, the device an even number of cells, in particular more than two, since with an even number of cells - as is clear from the above explanations - magnetic fields arising during a charge shift can be compensated particularly well, with each cell another with reversed magnetic field is available for compensation ,
- the cells may be wound cells, as commonly used in lithium-ion technology, where the foil-shaped components of the cell are wound into a multilayer bobbin and pressed into a solid metal housing. This also includes the electrolyte present in liquid form, if no pure solid-state ion conduction is provided, and is hermetically sealed.
- the cells may be stratified or prismatic cells, as is common practice in lithium polymer technology. These have the form of flat cells and form the device as a flat storage element by, for example, they are arranged flat adjacent to each other.
- the electrodes of the cells are arranged stacked, with the interposition of Separator and current collectors, for example, under pressure and temperature or by adhesion bonded together and into a housing, e.g. in a metallized
- the housing is usually filled with electrolyte and hermetically sealed, for example by sealing the Gezzausefolienberandung. Inside the housing, a vacuum is set during the final closure.
- the electrolyte is incorporated in this cell type in the battery body into a microporous electrode and separator structure or absorbed and immobilized by gelification of the polymer binder in the layers.
- Electrodes, separators and current collectors are formed flat (as a sheet) or made of films.
- the thickness of the electrodes is preferably between 200 ⁇ m and 50 ⁇ m, but is not fixed to these layer thicknesses. It is important to ensure coordinated capacities of anodes and cathodes, as known in the art.
- the electrodes of the device according to the invention are, in the case of lithium accumulators, anodic as well as cathodic, materials which can reversibly intercalate and dislocate lithium without significant structural changes of the host lattice. These can be among others
- Lithium metal oxide compounds such as LiCoO 2 , LiMn 2 O 4 , or other lithium compounds such as LiFePO 4 , as known in the art.
- carbon is used in a wide variety of modifications.
- a particularly safe and long-lived alternative to carbons for example, Li 4 Ti 5 Oi 2.
- any other technology for batteries or accumulators can be used.
- the thickness of a film-like separator is preferably between 10 .mu.m and 60 .mu.m.
- the strength of the current collector is preferably in a range of 10 microns and 30 microns.
- the result is a thin battery element consisting of two current conductors for anode and cathode, the anode and the cathode foil and the separator.
- the element is usually filled with electrolyte fluid.
- the desired target capacity can be adjusted, which then results in the thickness of a cell. It is typically between 0.5mm and 20mm, but is not limited thereto.
- the object of the invention is particularly advantageous to solve in this construction, since it is possible to distribute a predetermined by the use of capacity requirement to the accumulator, for example, two or a multiple of two cells by the number of battery elements in a housing to two or a multiple of two cells, each with the adjusted number of battery elements is divided. These can then be constructed in the field of bushings as described above magnetic field compensating.
- the housing of lithium-ion batteries is a deep-drawn metal cup, which is typically made of aluminum. After inserting the battery body and the electrolyte addition, this cup is hermetically sealed by a suitable joining method such as laser welding with a lid containing the feedthroughs. In the case of polymer cells, the encasing of the battery body takes place with an aluminum foil coated on both sides with plastic, which is closed by a sealing step in the edge region.
- the magnetic field compensating arrangement can be carried out using a bifilar winding technique or a quadrupole arrangement.
- the charge leading conductors in the form of a plaited braid arranged.
- the quadrupole arrangement has been proven. Whether a bifilar winding technique or a quadrupole arrangement is used depends primarily on the flexibility and shape of the conductors or terminal lugs. Since the current feedthroughs or terminal lugs of a lithium cell are usually designed in the form of metal strips which are not bifilar windable, a quadrupole arrangement is particularly advantageous in this case.
- the quadrupole arrangement is effected in particular in that the current storage element is not realized as a single cell, but divides the capacitance into at least two cells which are switched as a magnetic-field-compensated unit.
- the cells preferably have identical dimensions and correspondingly reduced, preferably identical capacity. They are advantageously arranged in such a way that the positive and the negative current conductors in the sense of Maxwell are reversed. In a particularly simple manner, this is possible if the terminal lugs are formed symmetrically to a central axis. Furthermore, the positive terminal lug can advantageously be arranged on one side of the central axis and the negative terminal lug on its opposite side. In this case, swapping of the feedthrough polarities or terminal lugs can advantageously be realized with only one cell type by arranging the cells rotated by 180 ° along the central axis. If the feedthroughs or terminal lugs are asymmetrical with respect to the center axis of the cell, the desired arrangement with magnetic field compensation can be achieved with two different embodiments, which differ by exchanging the polarities of the feedthroughs or terminal lugs.
- the further wiring of the component according to the invention following the terminal lugs or bushings, e.g. with a protective circuit or the periphery is preferably carried out with bifilar wound conductors. It is also possible that this further wiring in the manner of a
- Quadrupole arrangement may be formed.
- the conductors of the further wiring can be welded or soldered to the terminal lugs.
- the cells have only permanent-magnetic or almost non-permanent-magnetizable materials.
- electrochemical storage elements can be provided in this way, which are both in the Charging as well as in unloading mode and in idle state are almost magnetic field free. The need for a control or regulation-technical compensation of constant or variable magnetic fields is eliminated.
- Permanent magnetic or permanent magnetizable in this sense are in particular ferromagnetic or ferrimagnetic substances such as iron, nickel or cobalt and other known materials.
- the known and currently used electrode materials in lithium batteries and accumulators are generally not permanently magnetizable or magnetic, not even the electrolytes or binders used.
- the housing material is advantageous if both sides plastic-coated aluminum, which is also not a permanent magnetizable material.
- the selection of the materials for the current collector and the terminal lugs or housing feedthroughs is to be made in a suitable manner.
- Electrode combination since the stability of the metals used for this depends on the electrochemical potential conditions in the cell. In systems with graphite-based anodes and lithium metal oxide compounds, it is advantageous to use copper on the anode and aluminum on the cathode. However, in commercial products, the housing feedthrough on the cathode side is typically performed as a nickel tab. This is disadvantageous since nickel is a ferromagnetic material. According to a proposal of the invention for this purpose, in addition to the current collectors and the terminal lugs or implementation are designed as copper flags, so as to achieve an amagnetic structure.
- Aluminiumabieiter on both sides of the electrode and also to carry out the terminal lugs or housing feedthroughs in the form of aluminum lugs.
- two or more cells can be connected in series in the sense of the invention.
- a parallel connection is also conceivable.
- an optimal quadrupole arrangement can be realized in the region of the current feedthroughs in the lithium-polymer technology described here, provided that an even number of cells are interconnected.
- the cells are stacked with alternating polarities of the current feedthroughs, so that positive and negative poles come to lie one above the other. These are connected to a series or parallel circuit with each other except for the outermost two poles, which are preferably performed by means of a bifilar wound pair of wires to the consumer.
- the invention furthermore relates to a method for producing an electrochemical component according to the invention, comprising the steps of: providing at least two primary or secondary cells, preferably designed as flat cells,
- Terminal lugs superimposed magnetic fields and substantially compensate.
- FIG. 1 shows the interior of an electrochemical cell, as used in the invention, in a schematic sectional view
- FIG. 3 shows two cells arranged in the form of a device according to the invention
- Fig. 4 is a schematic representation of a quadrupole arrangement
- Fig. 5 is a schematic representation of a bifilar winding.
- the interior of an electrochemical cell 20a, b shown in FIG. 1 may be provided for a primary or a secondary cell. It has an anode 1 and a cathode 2. Between these, a separator 3 is arranged. On the opposite side of the separator 3 of the anode 1 is an anode current collector 4, whereas on the side facing away from the separator 3 of the cathode 2, a cathode current collector 5 is located.
- Anode 1, cathode 2, I separator 3 and anode and cathode current collector 4,5 are film elements of small thickness or thickness, which are enlarged in the figure 1 only for the sake of clarity and not necessarily shown in correct proportions.
- FIG. 1 also shows the charge currents in the component 21 under operating conditions (during the discharge), with the electron current in anode 1 and cathode 2 being indicated by arrows 6 and the opposing ion current being indicated by arrows 7.
- An arrow 8 indicates the electron flow in the anode current collector 4 and an arrow 9 that in the cathode current collector 5.
- FIGS 2 and 3 show two cells 20 a, b, in which, for example, arrangements according to the figure 1 are each housed in a housing 10 which is formed of a film. These envelop the cells 20 a, b in each case completely and are each hermetically sealed with a peripheral sealing seam 11.
- each cell 20 a, b connected to the anode 1 terminal lug 12 a, 12 b and a cathode 2 connected to the terminal connecting lug 13 a, 13 b are provided, which protrude through the housing 10.
- the terminal lugs 12,13 are spaced from each other by a distance d, which may be formed differently large depending on the production or connection requirements.
- FIG. 3 shows how The two cells 20a, b are arranged relative to one another in such a way that the connection lug 12a connected to the anode 1 of the first cell 20a adjoins the connection lug 13b connected to the cathode 2 of the second cell 20b and the terminal lug 13a connected to the cathode 2 of the first cell 20a is disposed adjacent to the terminal lug 12b connected to the anode 1 of the second cell 20b.
- the terminal lugs 12a, 12b, 13a, 13b form a four-pole arrangement, shown schematically in FIG. 5, in which the magnetic fields surrounding the terminal lugs 12a, 12b, 13a, 13b mutually compensate each other and largely extinguish them.
- two cells 20a, b are connected in parallel according to the invention.
- the interconnection has two identical lithium batteries as cells in lithium polymer technology with a capacity of 2.2 Ah each.
- the position of the terminal lugs is symmetrical to the longitudinal axis of the cells, so that a quadrupole arrangement in the region of the housing feedthrough can be realized by the exact juxtaposition of the two cells with interchangeable position of the terminal lugs.
- the connection lugs are arranged as close as possible to each other as far as possible in terms of manufacturing technology. As electrode pairing is
- Lithium cobalt oxide LiCoO 2 in the cathode and graphite in the anode Lithium cobalt oxide LiCoO 2 in the cathode and graphite in the anode.
- the current conductors including the housing feedthroughs consist of aluminum on the anode side and copper on the cathode side. By placing an insulation between the overlapping tabs prevents short circuits can occur at this point.
- the structure described has a capacity of 4.4 Ah with a mean voltage of 3.7 V. It was subjected to a strong external magnetic field in various orientations to magnetize any hidden permanent magnetizable materials contained therein. After this preliminary run, the pair of cells including circuitry and without load on the measuring head of a highly sensitive magnetometer with a resolution of well below 1 nT in different orientations on interference fields was measured. There were stray fields between 2 and 3 nT. It can be concluded that no permanent magnetizable materials were present in the structure.
- this structure was subjected to a constant current load of 1 C via the load and again measured magnetically. Slightly increased field strengths were observed, but not exceeding 5 nT. This value is by a factor of 10,000 below typical values of the earth's magnetic field, which has values between 20 and 50 ⁇ T depending on the position and orientation on the earth's surface.
- two cells according to the invention are connected in series with one another.
- lithium iron phosphate LiFePO 4 are used as the cathode material and lithium titanate Li 4 Ti 5 Oi 2 as the anode material.
- Two identical cells are arranged so that, after the cells are superimposed, their feedthroughs form a quadrupole arrangement.
- the capacity of each individual cell is 4.4 Ah in this case.
- the average voltage in this system is 1, 8 V, so that by serial connection of these two cells, a mean voltage of 3.6 V results.
- this arrangement covers almost the same operating range as the previously described structure with parallel connection. It can be used with a number of advantages as an alternative to this. So are
- serial connection is made by the positive pole of one cell with the negative pole of the other cell, which are each one above the other, directly on the housing feedthrough outside the battery body is permanently connected. Between the two still unconnected tabs is an insulation and attached to each a thin flexible cable, which are then guided bifilar wound to the consumer.
- a particular advantage of this serial interconnection is that a uniform current occurs under operating conditions throughout the entire circuit. This is not necessarily the case with a parallel connection. For example, in the case of internal aging resistances of the cell which vary as a result of different aging, different currents would occur in the respective cells of the parallel connection.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Dispersion Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008032068A DE102008032068A1 (de) | 2008-07-08 | 2008-07-08 | Verbessertes elektrochemisches Speicherelement |
PCT/EP2009/058668 WO2010003979A1 (de) | 2008-07-08 | 2009-07-08 | Verbessertes elektrochemisches speicherelement |
Publications (1)
Publication Number | Publication Date |
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EP2301096A1 true EP2301096A1 (de) | 2011-03-30 |
Family
ID=41202783
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09780315A Ceased EP2301096A1 (de) | 2008-07-08 | 2009-07-08 | Verbessertes elektrochemisches speicherelement |
Country Status (4)
Country | Link |
---|---|
US (1) | US20110262798A1 (de) |
EP (1) | EP2301096A1 (de) |
DE (1) | DE102008032068A1 (de) |
WO (1) | WO2010003979A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110262787A1 (en) * | 2010-04-23 | 2011-10-27 | Hosein Maleki | Electrochemical Cell with Reduced Magnetic Field Emission and Corresponding Devices |
US20110262779A1 (en) * | 2010-04-23 | 2011-10-27 | Hossein Maleki | Electrochemical Cell with Reduced Magnetic Field Emission and Corresponding Devices |
US8642205B2 (en) * | 2010-08-09 | 2014-02-04 | Motorola Mobility Llc | Electrochemical battery pack with reduced magnetic field emission and corresponding devices |
KR101285745B1 (ko) * | 2010-08-23 | 2013-07-23 | 주식회사 엘지화학 | 개선된 구조의 젤리-롤 및 이를 포함하는 이차전지 |
JP6363645B2 (ja) | 2016-03-09 | 2018-07-25 | 株式会社東芝 | 電池モジュール、電池、蓄電池、及び電気装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1134732B (de) * | 1959-09-22 | 1962-08-16 | Tudor Ab | Schaltung von Akkumulatorbatterien und Verbinder zur Durchfuehrung der Schaltung |
NZ270723A (en) * | 1995-03-15 | 1998-06-26 | Glorywin Int Group Ltd | Auxiliary and cranking batteries in same box |
DE10059568A1 (de) * | 2000-11-30 | 2002-06-20 | Siemens Ag | Brennstoffzellenmodul |
JP3573141B2 (ja) * | 2002-06-26 | 2004-10-06 | 日産自動車株式会社 | 薄型電池、組電池、複合組電池および車両 |
JP4249727B2 (ja) * | 2005-05-13 | 2009-04-08 | 株式会社東芝 | 非水電解質電池およびリチウムチタン複合酸化物 |
WO2007112116A2 (en) * | 2006-03-27 | 2007-10-04 | Alcoa Inc. | Integrated module connection for hev battery |
-
2008
- 2008-07-08 DE DE102008032068A patent/DE102008032068A1/de not_active Ceased
-
2009
- 2009-07-08 WO PCT/EP2009/058668 patent/WO2010003979A1/de active Application Filing
- 2009-07-08 EP EP09780315A patent/EP2301096A1/de not_active Ceased
- 2009-07-08 US US13/003,133 patent/US20110262798A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
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See references of WO2010003979A1 * |
Also Published As
Publication number | Publication date |
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DE102008032068A1 (de) | 2010-01-28 |
WO2010003979A1 (de) | 2010-01-14 |
US20110262798A1 (en) | 2011-10-27 |
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