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
  • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
• • 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
  • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
  • H01M10/4264—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing with capacitors
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M2200/00—Safety devices for primary or secondary batteries
• • 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
  • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
  • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
  • H01M50/51—Connection only in series
• • 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
  • H01M50/572—Means for preventing undesired use or discharge
  • H01M50/574—Devices or arrangements for the interruption of current
• • 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

Definitions

• the invention relates to an electrical energy storage cell.
• the invention further relates to an electrical energy storage module.
• the battery cells taken approximately DC or fed into the battery cells.
• Battery systems with integrated converter are known in the prior art, in which a rapid change of the current conduction through a battery module or past the battery module is required for a variation of a strand voltage.
• a rapid change of the current conduction through a battery module or past the battery module is required for a variation of a strand voltage.
• An inductive component of the cell impedance acts to the outside to a power electronics and can generate high loss energies in the semiconductor switches used in the power electronics in the switching operations in combination with high currents. at certain, unavoidable switching operations, driven by the stored in the inductors electrical energy, avalanche breakdown (avalanche operation of the semiconductor switch).
• DE 10 2010 041 028 A1 discloses a power supply network which has a controllable energy store which serves to control and supply electrical energy to an n-phase electrical machine with n> 1.
• the controllable energy store has n parallel energy supply branches, each of which has at least two energy storage modules connected in series, which each comprise at least one electrical energy storage cell with an associated controllable coupling unit.
• the invention provides an electrical energy storage cell comprising a low-inductance capacitive parallel path connected between poles of the energy storage cell, characterized in that the capacitive parallel path is an integral part of the energy storage cell.
• the invention provides an electrical energy storage module having at least two electrical energy storage cells, wherein the energy storage cells are connected to each other in series, wherein a dielectric layer between a Abieiter a negative pole and a Abieiter a positive pole of the energy storage cells is arranged.
• a preferred embodiment of the energy storage cell according to the invention is characterized in that the dielectric layer is arranged outside the cell housing. In this way it is advantageous not to intervene internal structures of the electrical energy storage cell. Furthermore, it is advantageous also subsequently a provision of the dielectric layer for the electrical
• a further preferred embodiment of the energy storage cell is characterized in that the capacitive parallel path by means of the dielectric layer, a the pole and a cell housing of the electrical energy storage cell is formed.
• already existing elements of the energy storage cell are advantageously used to form a capacitor by means of the dielectric layer, which is connected in parallel with the poles.
• Another preferred embodiment of the memory cell according to the invention is characterized in that the dielectric layer has a surface structuring with elevations. In this way, the surface of the dielectric layer is increased, whereby advantageously an increased capacitance value can be represented. Furthermore, the pole can advantageously be reduced in size in this way.
• Another preferred embodiment of the energy storage cell according to the invention is characterized in that the dielectric layer is formed areally between the areal negative terminal and the areal positive pole of the energy storage cell, wherein the positive pole and the negative pole are formed essentially over the entire area of the energy storage cell.
• a preferred embodiment of the energy storage cell is characterized in that the dielectric layer is arranged within the cell housing. This provides a further alternative design possibility for the design of the energy storage cell with the capacitive parallel path.
• a preferred embodiment of the memory cell is characterized in that the dielectric layer is arranged at least in a partial area between a collector of the poles, the dielectric layer being arranged in a region of the initiation or the discharge of the conductors into a cell coil. This is advantageous various design options for the utilization of the area between the Abieitern to arrange there a dielectric layer.
• An advantageous development of the electrical energy storage cell according to the invention is characterized in that the dielectric layer between the cell housing and the Abieiter of the negative pole is formed flat and that the Abieiter is formed flat, the Abieiter is located close to the housing.
• a modification of the Polableiters takes place, which is formed flat and thereby represent a large capacity by means of the electrical layer.
• a preferred embodiment of the electrical energy storage cell is characterized in that the dielectric layer is formed as a cell electrolyte of the energy storage cell. This advantageously provides an alternative variant for the dielectric layer in the event that the cell electrolyte has a sufficiently large size
• Dielectric constant has. It is advantageous in this way no additional layer between Abieitern the poles required, except when the
• Insulation effect is not high enough.
• a preferred embodiment of the energy storage cell is characterized in that the insulating layer between the negative pole and the housing is formed as a dielectric layer. In this way, once again, the area of the dielectric layer can be increased, thereby representing an even larger capacity.
• a preferred embodiment of the energy storage cell is characterized in that the capacitive parallel path has no additional supply lines. In this way, an impedance with the lowest possible ohmic and inductive components is represented, which advantageously reduces an outwardly acting total inductance of the battery cell during switching operations. Furthermore, this advantageously does not give any additional resistive or inductive components, as a result of which a minimum ESR or ESL of the capacitive
• a preferred development of the energy storage module according to the invention is characterized in that the dielectric layer is arranged between the negative drain and an extended positive conductor, wherein an insulating layer is arranged between the cell connectors. Also in this way can be a great external Surface for the dielectric layer between the plus and minus pole can be shown and a capacitor effect is formed.
• Electric energy storage cell include all devices that can store over a predefined period of time electrical energy store over a further period.
• Electric energy storage modules according to the present invention comprise components which have one or more electrical energy storage cells in a housing, wherein the electrical energy storage cells are suitably electrically coupled to one another in order to provide a serial and parallel connection of the energy storage cells.
• Electrical energy storage modules can have module connections to which an output voltage dependent on the internal interconnection of the electrical energy storage cells of the electrical energy storage module can be tapped off.
• Fig. 1 illustrates a principal electrical equivalent circuit diagram of an embodiment of the electrical energy storage cell according to the invention
• Energy storage cell 10 e.g. is used in a high-voltage battery in the automotive sector, has an electrical cell impedance Z, wherein parallel to a positive pole and a negative pole of the cell impedance Z, a capacitor C is connected.
• the capacitance C is preferably formed as an integral part of the electrical energy storage cell 10.
• the capacitance C has no leads, resulting in a low equivalent serial resistance (ESR) and a low equivalent series inductance (ESL equivalent serial inductance).
• ESR equivalent serial resistance
• ESL equivalent serial inductance low equivalent series inductance
• FIG. 2 shows a basic design detail of an embodiment of the electrical energy storage cell 10 according to the invention.
• a dielectric layer 16 is arranged between a cell housing 1 1 of the electrical energy storage cell 10 lying at a positive potential and an arrester 15 of the negative pole 14.
• the dielectric layer 16 is preferably thin (preferably in a range between 1 ⁇ to 1 mm) and preferably has a high dielectric constant or relative permittivity, which should be at least> 100, preferably> 1000.
• An exemplary material for the dielectric layer 16 is barium titanate.
• a surface of the plates can be varied to achieve a required capacitance value, the sizes A, ⁇ ⁇ and d. For a given area A, for example, the distance d and ⁇ ⁇ could be adjusted.
• the negative pole 14 and the lying on positive potential cell housing 1 1 thus a capacitor is formed, which has no additional leads.
• the capacitive parallel path between the poles of the electrical energy storage cell 10 is realized as short a path as possible.
• a horizontal area dimension of the negative pole 14 is increased, so that in this way a larger area for the capacitor and thus a larger capacitance value can be represented favorably.
• FIG. 3 shows a schematic detail of a further embodiment of the electrical energy storage cell 10 according to the invention
• Surface of the dielectric layer 16 has a structuring, which is preferably formed on the two opposite surfaces of the dielectric layer 16 and on one side of a structuring of the cell housing 1 1 corresponds.
• the structure is preferably formed as a micro or nanostructure and has the purpose of further enlarging the surface of the dielectric layer 16 so as to represent an increased capacitance value.
• FIG. 4 shows in a schematic cross-sectional view a constructive detail of a further embodiment of the electrical energy storage cell 10 according to the invention.
• memory cell 10 is located in the interior of the electrical energy close between the cell housing 1 1 lying at positive potential and a flat conductor 15 of the negative pole 14 a dielectric layer 16 with a high
• Dielectric constant arranged.
• additional volume is generated within the cell housing 1, whereby an energy density of the electric energy storage cell 10 is advantageously hardly or not deteriorated.
• the dielectric layer 16 have a micro- or nanostructured surface to increase its surface area.
• an insulating layer 18 between the negative terminal 14 and the cell housing 1 1 is arranged.
• a horizontal area dimension of the negative pole 14 is preferably made large, so as to represent an increased capacitance value.
• a large-area contact is supported in this way.
• an additional dielectric layer 16 is arranged so as to be able to represent an even greater capacitance value in this way.
• FIG. 5 shows, in a principal perspective view, a further embodiment of the electrical energy storage cell 10.
• the positive pole 12 is formed on a front side of the energy storage cell 10 essentially over the entire front side.
• the negative pole 14 is led out at the front of the energy storage cell 10 (behind the positive pole 12) substantially over the entire front, wherein by means of a dielectric layer 16 of the positive terminal 12 is isolated from the negative terminal 14.
• an external plate capacitor is provided externally from the electrical energy storage cell 10.
• 14 can be a galvanically conductive connection to a further electrical
• FIG. 6 shows in a schematic cross-sectional view a construction detail of a further embodiment of the electrical energy storage cell 10 according to the invention. It can be seen that in a partial area between the arrester 15 of the negative pole (not shown) and the arrester 13 of the positive pole (not shown) a dielectric layer 16 is arranged, which is guided substantially completely along a side wall and an upper inner surface of the energy storage cell 10. In this way, the largest possible area of the dielectric layer 16 can advantageously be realized, as a result of which a maximum capacitance value can be represented.
• the embodiment of the energy storage cell 10 according to the invention of FIG. 7 has a structural modification of the embodiment of FIG. 6. It can be seen that now the dielectric layer 16 in a partial area between a central led out Abieiter 15 of the negative pole (not shown) and a center
• Abieiter 13 of the positive pole substantially over a large area along a lower inner surface of the energy storage cell 10 is executed.
• the arrangement or the distance between the Abieitern 13, 15 is merely exemplary and may alternatively be different or larger dimensions.
• the variant of the dielectric layer 16 to be realized thus essentially depends on an internal configuration of the cell windings of the energy storage cell 10, whereby the requirements for the parallel capacity according to the invention can be taken into account in a design phase of the energy storage cell 10 in the best possible way.
• FIG. 8 shows, in a basic view from above, an implementation of the invention at the module level.
• a plurality of electrical energy storage cells 10 by means of connecting elements or Dellverbi parks 20, electrically connected in series, whereby the total module voltage, the sum of the individual voltages of the electrical
• Energy storage cells 10 can be tapped. On a lower side of the energy storage module 30 formed thereby, a drain 15 for a negative pole (not shown) is led out. A dielectric layer 16 (shown hatched) with a high dielectric constant is arranged between the conductor 15 and a likewise lead-out conductor 13 of the positive pole (not illustrated), whereby a parallel capacitor is formed on a maximum area between the electrical energy storage cells 10
• FIG. 9 shows in a principal view from above a structural modification of the embodiment of the energy storage module 30 of FIG. 8. It can be seen that in this case the drain 13 is formed along substantially all energy storage cells 10, the dielectric layer 16 being between the two Abieiter 13 and the Abieiter 15 is arranged. Between the Abieiter 13 and the connecting elements 20, an insulating layer 18 is arranged for the purpose of isolation.
• FIG. 10 shows a front view of another embodiment of the energy storage module 30 according to the invention. It can be seen that a positive pole (cathode, aluminum) conductor 13 of a single energy storage cell has a positive energy storage cell
• Stromabieiterschiene 22 contacted.
• Several of the aforementioned energy storage cells 10 are electrically connected in series with each other, wherein the individual cells are contacted by the Stromabieiterschienen 21, 22.
• an existing space between the Stromabieiterschienen 21, 22 is used to arrange therein the dielectric layer 16, to form in this way the parallel capacitor.
• the present invention provides a technical solution for reducing an outward-acting cell inductance of a battery cell when used at high switching frequencies in an AC operation in a battery system with an integrated converter.
• harmful degradation or aging effects of electronic power semiconductor switches eg, MOS FETs or IGBTs, which are interconnected, for example, in a B4 bridge circuit
• an operating time of said semiconductor switches can thereby be significantly extended, and said semiconductor switches do not have to be subjected to elaborate certification processes for avalanche operation. Due to the reduced losses, it is also possible to increase the efficiency of the semiconductor switches.
• a design of the battery cells can be adapted early to implement the invention, whereby a cost-effective implementation of the invention is possible. It can therefore be advantageously intervened early in the cell design to integrate the capacitive parallel path with.
• the capacitive parallel path to the poles is thus an integral part of the electrical energy storage cell, which is effectively a kind of combination component with the functions energy storage and capacitor.
• the capacitive parallel path should have the highest possible capacity with the following

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• Engineering & Computer Science (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Manufacturing & Machinery (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Charge And Discharge Circuits For Batteries Or The Like (AREA)

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Citations (5)

• 2012
  • 2012-08-07 DE DE102012213945.1A patent/DE102012213945A1/de not_active Withdrawn
• 2013
  • 2013-07-12 WO PCT/EP2013/064852 patent/WO2014023517A1/fr not_active Ceased

Patent Citations (5)

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