EP3092655A1 - Ensemble de stockage d'energie electrique, et procede de fabrication associe - Google Patents
Ensemble de stockage d'energie electrique, et procede de fabrication associeInfo
- Publication number
- EP3092655A1 EP3092655A1 EP15700428.4A EP15700428A EP3092655A1 EP 3092655 A1 EP3092655 A1 EP 3092655A1 EP 15700428 A EP15700428 A EP 15700428A EP 3092655 A1 EP3092655 A1 EP 3092655A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode
- elementary
- terminal
- storage element
- layers
- 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.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000004033 plastic Substances 0.000 claims abstract description 23
- 229920003023 plastic Polymers 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims description 33
- 238000004146 energy storage Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Classifications
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- 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
- H01M10/0431—Cells with wound or folded electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
- H01G11/12—Stacked hybrid or EDL capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/52—Separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/66—Current collectors
- H01G11/72—Current collectors specially adapted for integration in multiple or stacked hybrid or EDL capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/74—Terminals, e.g. extensions of current collectors
- H01G11/76—Terminals, e.g. extensions of current collectors specially adapted for integration in multiple or stacked hybrid or EDL capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/417—Polyolefins
-
- 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
- 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
- Y02E60/13—Energy storage using capacitors
-
- 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
Definitions
- the present invention relates to an electrical energy storage assembly, and a method of manufacturing such an assembly.
- the present invention relates to an electrical energy storage assembly having a plastic separator layer.
- Such an electrical energy storage element generally comprises two electrodes of opposite polarity, porous and impregnated with electrolyte, between which is disposed an insulating and porous layer called "separator".
- the separator layer is used to isolate the electrodes from each other so as to avoid short circuits, while ensuring the ionic conduction between the electrodes.
- ions move under the effect of an electric field to or from the surface of the electrodes depending on the state of charge or discharge of the supercapacitor.
- the ions move from one electrode to another depending on the state of charge or discharge of the battery under the effect of chemical reactions taking place at each of the electrodes.
- plastic separators is often preferred over the use of paper separators. Indeed, the use of such separators made of polymer not only makes it possible to obtain a storage element having a better resistance to aging, but also to use the storage element at a higher electrical voltage. The use of such separators also makes it possible to reduce the risk of perforation of said separators which can cause electrical contact of two adjacent electrodes of opposite polarity, and therefore a short circuit in the storage element, and also reduce the manufacturing costs of a storage element.
- the storage elements as described above are generally placed in a rigid outer casing having a housing and at least one cover closing the housing to form a storage assembly.
- the manufacture of a storage assembly as described above requires one or more heating steps that can bring the storage element to high temperatures.
- Such steps are for example the polymerization step of the adhesive used to connect the lid and the housing forming the envelope accommodating the storage element, the dehydration step of the storage element in order to reduce the impurities present. in the electrolyte whose electrodes are impregnated, or the soldering step for electrically connecting each of the electrodes to the terminals of the envelope accommodating the storage element, during which the storage element can be carried up to temperatures of about 180 ° C.
- An object of the present invention is therefore to propose an electrical energy storage assembly comprising at least one plastic separator layer making it possible to avoid shrinkage of the separator when heating the storage element, while retaining the benefits of using the plastic separator.
- an electrical energy storage assembly comprising:
- an electrical energy storage element comprising at least one elementary cell comprising a first and a second electrode complex superimposed in a superposition direction, said elementary cell further comprising a first plastic separator, in particular made of polypropylene, extending between the first and the second electrode complex,
- an outer envelope accommodating the storage element, the envelope comprising two distinct electrical terminal surfaces of the assembly and having an opposite polarity, the first complex or complexes being electrically connected to a first terminal and the second complex or complexes being connected electrically to a second terminal,
- the assembly being characterized in that the element comprises at least one additional layer extending at least one end of the storage element in the direction of superposition, each additional layer being constituted by a component identical to one components of the elementary cell, none of the additional layers of the same end of the storage element being connected to the terminal of polarity opposite to the terminal to which is connected the electrode complex adjacent to said additional layers.
- the separator By placing one or more additional layers which do not risk being short-circuited with the electrode complexes which make it possible to store energy (those of the elementary cells), the separator is thus better isolated from the outside.
- the additional layer (s) serve indeed as a heat shield and make it possible, by their presence, to reduce the quantity of heat transmitted to the separator of the elementary cell closest to the end of the stack.
- the assembly With an assembly according to the invention, it will be possible even if necessary to use temperatures higher than those of the state of the art during the manufacture of the assembly, according to the needs, thus reducing the time and potentially the cost of the process. Manufacturing.
- the assembly also makes it possible to widen the range of the polymers that can be used as separator, since the melting temperature is no longer such a strong constraint, to use the polymer whose properties are optimal relative to the desired use.
- the or at least one additional layer comprises an electrode.
- the porosity of the electrode makes it possible to trap air in large quantities and thus to produce a very efficient heat shield.
- the or at least one of the elementary cells is provided with at least one collector for connecting an electrode complex of the cell to the corresponding terminal, the or at least one one of the additional layers having a collector.
- the collector may be part of the electrode complex but it may also be a component independent of the electrode.
- the or at least one of the additional layers is an electrode complex comprising at least one electrode and an integral collector.
- the or at least one of the additional layers comprises a plastic separator, the additional layers then being inexpensive.
- the storage element comprises at least one of its ends three adjacent additional layers formed of two layers comprising an electrode between which a separator layer is interposed.
- At least one end of the element, at least one additional layer comprising an electrode is connected to the terminal of the same polarity as the electrode complex adjacent to the additional layers of said end. In this case, there is no risk of a short circuit.
- an additional layer of one of the ends is connected neither to the first nor the second terminal, the additional layer is of the separator, collector or electrode type. There is no risk of a short circuit either.
- the components of the elementary cell or cells form stacked flat layers, the additional layer or layers being placed at one and / or the other end of the stack.
- the components of the elementary cell or cells are wound so that the same component forms a plurality of layers of the winding and the element is generally cylindrical in shape, the the additional layers being placed inside and / or outside the winding.
- the additional layer located furthest inside the coil is a layer comprising an electrode and / or a collector, which makes it possible to prevent the innermost layer of the coil from sticking to the pin of the coil. winding, as would have been the case if this layer had been a plastic separator.
- At least one of the additional layers is made using a component which also forms at least one layer of the cell or at least one of the elementary cells, which makes it possible to form the additional layers so as to form very simple and economical. This configuration is particularly applicable when the element is wound.
- the envelope comprises a housing and at least one cover closing the housing, the terminal surfaces being arranged on two separate parts, the parts being preferably connected with the interposition of an electrically insulating joint.
- the subject of the invention is also a method of manufacturing an electrical energy storage assembly, in particular so as to form an assembly as previously described, comprising the steps of: superposition of a first electrode complex, a first separator, and a second electrode complex in a superposition direction, so as to form an elementary cell;
- the storage element in an outer envelope and electrically connecting the storage element to electrical terminals of opposite polarity of the storage assembly, formed by two distinct surfaces of the envelope, so that the first complex or complexes are electrically connected to a first terminal and the second complex or complexes are connected to a second terminal and none of the additional layers at one end of the storage element are connected to the opposite polarity terminal to the polarity terminal to which the electrode complex adjacent to said additional layers is connected.
- the storage element it is possible to first set up the various elementary cells and then add the additional layers to the end or ends of the stack.
- the additional layers can be put in place first, at least at one end of the stack, before setting up the components of the elementary cells. Additional layers and elementary cells could also be formed simultaneously.
- the method comprises the steps of:
- a part of the components of the elementary sequence is preferably wound alone around the winding axis, so as to form a core of at least one additional layer around which the sequence Elemental is then rolled up.
- said one or one of said components comprises an electrode.
- the first electrode complex and the first separator are wound alone around the winding axis, so as to form the core of at least one additional layer.
- a part of the components of the elementary sequence is wound alone around the winding axis, so as to envelop at least one additional layer the coil comprising the elementary sequence.
- the second electrode complex and the second separator layer are wound alone around the winding axis so as to wrap the coil with at least one additional layer.
- the method comprises the steps of:
- FIG. 1 represents an exploded view of an electrical energy storage assembly comprising an electrical energy storage element according to an embodiment of the invention in which the storage element is said to be "wound";
- FIG. 2 represents a schematic view of an elementary sequence of an electrical energy storage element
- Figure 3 shows a schematic sectional view of the wound storage element shown in Figure 1;
- FIG. 4 shows a schematic view of an electrical energy storage element according to another embodiment of the invention than that shown in Figures 1 and 3, wherein the storage element is said "stacked".
- Figure 1 shows an electrical energy storage assembly 10 according to one embodiment of the invention.
- the storage assembly 10 includes an outer casing 11.
- the outer casing 1 1 is substantially cylindrical and extends along a longitudinal axis 12.
- the outer casing 1 1 comprises a casing 13 provided with a side wall and a bottom 14 disposed at a first end of the housing 13 along the longitudinal axis 12 and open at a second end opposite the bottom 14.
- the outer casing 1 1 further comprises a lid 15 attached to the second end of the housing 13 to close the open end of the housing 13.
- the cover 15 is for example glued to the housing 13.
- the cover 15 and the bottom 14 each form a terminal of opposite polarity of the storage assembly 10.
- the outer casing 11 comprises a casing provided with a lateral wall and two covers each attached to one of the open ends of the casing along the longitudinal axis 12, and each forming a terminal of opposite polarity.
- the outer casing 1 1 accommodates an electrical energy storage element 16, for example a supercapacitor or a battery.
- an electrical energy storage element 16 for example a supercapacitor or a battery.
- the storage element 16 forms a coil. It is said "coiled".
- the storage element 16 comprises an elementary sequence 17 represented in FIG. 2.
- the elementary sequence 17 comprises an elementary cell 18.
- the elementary cell 18 comprises a first electrode complex 19 and a second electrode complex 20 superimposed on one another in a superposition direction 21.
- the first and second electrode complexes 19 and 20 each comprise two electrodes 22 and 23 between which an electric current collector 24 and 25 is interposed.
- the electrodes 22 and 23 and the collector 24 or 25 are in one piece.
- the first and second electrode complexes comprise a single electrode and / or a single electrode with a current collector.
- the elementary cell may comprise a collector layer in addition to the electrode complex.
- electrode complex 19 and 20 have been described at the two terminals of the elementary cell 18, but that the elementary cell 18 could very well be asymmetrically formed, for example comprising a first or a second one.
- electrode complex 19 or 20 as previously described and a second or a first electrode complex 20 or 19 composed a single electrode and a collector layer or having any other architecture.
- the electrodes 22 and 23 are porous and impregnated with an electrolyte.
- the electrodes 22 and 23 are for example mainly made of activated carbon.
- the first electrode complex 19 forms a first set of a first polarity connected to a first electrical terminal by means of the collector 24.
- the first terminal is for example formed by the cover 15 of the outer casing 11.
- the second electrode complex 20 forms a second set of a second polarity connected to a second electrical terminal by means of the collector 25.
- the second terminal is of opposite polarity to the first terminal.
- the second terminal is for example formed by the bottom 14 of the outer casing 11.
- the elementary cell 18 further comprises a first separator 26 disposed between the first electrode complex 19 and the second electrode complex 20.
- the first separator 26 is made of plastic, for example polypropylene, and electrically isolates the first and second complexes 19 and 20 between them, so as to avoid the generation of a short circuit in the storage element 16.
- the first separator 26 is porous so as to allow the ionic conduction between the first and second complexes of electrode 19 and 20.
- the elementary sequence 17 further comprises a second separator 27 superimposed on the second electrode complex 20 of the elementary cell 18 in the superimposition direction 21.
- the elementary sequence 17 is wound on itself around a winding axis 28, so as to form the coil.
- the winding axis 28 coincides with the longitudinal axis 12, when the storage element 16 is placed inside the outer casing 11. All the layers of the coil which are of the same nature are therefore in one piece, being constituted respectively by the same component of the elementary sequence.
- all the layers comprising the first electrode complex 19 are in one piece, and all the layers comprising the second electrode complex 20 are in one piece.
- all the layers comprising the first separator 26 are in one piece, and all the layers comprising the second separator 27 are in one piece.
- FIG. 1 A sectional view of the coil is schematically shown in FIG.
- the first electrode complex 19 interacts with the second electrode complex 20 of the same winding turn n, but also with the second electrode complex 20 of the winding tower n-1.
- the second electrode complex 20 interacts with the first electrode complex 19 of the same winding turn n, but also with the first electrode complex 19 of the winding revolution n + 1.
- the collector 24 of the first electrode complex 19 and the collector 25 of the second electrode complex 20 project with respect to the electrode layers 22 and 23 in an opposite direction along the winding axis 28. In this way, the collector 24 of the first electrode complex 19 projects towards the first terminal 15 and the collector 25 of the second electrode complex 20 projects towards the second terminal 14, when the storage element 16 is positioned inside the the outer envelope 1 1. Thus, the connection of the collectors 24 and 25 to their respective terminals is easier.
- the storage element 16 also comprises additional layers 29 and 30 respectively at each of the ends 31 and 32 of the storage element 16 in a radial direction.
- the additional layers 29 are wound on themselves about the winding axis 28, so as to form a core around which the elementary sequence 17 is wound.
- the additional layers 30 are wound around the coil along the winding axis 28, so as to envelop it.
- Each additional layer 29 and 30 is constituted by a component identical to one of the components of the elementary cell 18. In other words, each additional layer 29 and 30 is chosen from the following components:
- an electrode complex comprising two electrodes between which an electric current collector is interposed
- the additional layers 29 and 30 are chosen from the components already available for the manufacture of the storage element 16.
- the storage element 16 may comprise additional layers
- the storage element 16 may comprise the same number or a different number of additional layers 29 and 30 at each radial end 31 and 32.
- the storage element 16 may also comprise additional layers 29 or 30 only at one of its radial ends 31 or 32.
- Radial ends 31 and 32 are constituted by an electrode complex comprising two electrode layers between which a current collector is interposed. Because of the porosity of the electrodes, which therefore contain a lot of air, the electrode complexes constitute particularly effective heat shields. Since the collectors are already assembled with the electrodes before formation of the elementary cells, the electrode complex is used in its entirety to form the additional layers 29 and 30. In the example of FIG. 30 are constituted by a separator, which is an inexpensive material.
- the storage element 16 comprises at the first radial end 31 two additional layers 29, including from the first radial end 31 towards the second radial end 32, an electrode complex and a separator. made of plastic
- the storage element 16 comprises at the second radial end 32 three additional layers 30, including two layers of plastic separator between which an electrode complex is interposed.
- the additional layers 29 are adjacent to the first electrode complex
- the additional layers 30 are adjacent to the second electrode complex 20 connected to the second terminal 14.
- the additional layers 30 of the second radial end 32 can not be connected to the first terminal 15.
- shrinkage is understood to mean a deformation of the plastic separator layers 26 and 27 tending to expose the electrode layers 22 and 23 at their ends along the winding axis 28 and which can lead to an electrical contacting of two electrode layers 22 and 23 adjacent of opposite polarity and therefore to a short circuit in the storage element 16.
- the additional layers 29 and 30 form a heat shield which makes it possible, when the storage element 16 is heated, to limit the shrinkage of the plastic separator layers 26 and 27 of the different elementary cells 18, and therefore of the reduce the risk of short circuits in the storage element 16.
- an additional layer 29 or 30 of a radial end 31 or 32 is connected to the terminal of the same polarity as the electrode complex 19 or 20 of the elementary cell adjacent to said additional layers.
- an additional layer 29 or 30 of a radial end 31 or 32 is connected neither to the first terminal 15 nor to the second terminal 14.
- the manufacture of the reeled storage element 16 proceeds according to the following method.
- the first electrode complex 19 and the first separator 26 are superimposed in the superimposition direction 21.
- the core is for example wound around a pin.
- the additional layer 29 closest to the first radial end 31 comprises an electrode, so that the additional layer 29 can not stick to the winding pin as may be the case if the additional layer 29 is a plastic separator.
- the first electrode complex 19 and the first separator 26 are chosen to form the additional layers 29 of the first radial end 31.
- the first electrode complex 19 and the first separator layer 26 are wound alone around the winding axis 28 on a lathe.
- the second electrode complex 20 and the second separator 27 are stacked on the first separator 26 - already wound to form the core - in the superposition direction 21, so as to form the sequence elementary 17.
- a fourth step all the layers of the elementary sequence 17 are wound together around the core, so as to form the coil.
- a part of the components of the elementary sequence 17 closest to the first end 33 of the elementary sequence 17 in the superimposition direction 21 is cut off, namely the first electrode complex 19 and the first separator 26, while the other part of the layers of the elementary sequence 17 is wound alone, on at least one turn, around the winding axis 28, so as to wrap the coil with at least one additional layer 30.
- first separator 26 can be cut off relative to the first electrode complex 20 also cut before finishing the winding, so that it exceeds a few millimeters of the first electrode complex 20 to prevent shorts in case of shrink in a tangential direction relative to the coil.
- the second electrode complex 20 and the second separator 27 are chosen to form the additional layers of the first radial end 31.
- the second electrode complex 20 and the second separator 27 are wound alone around the winding axis 28 on a lathe.
- the storage element 16 is put in place in the outer envelope January 1, and in a seventh step, the storage element 16 is electrically connected to the first and at the second electrical terminal 15 and 14, so that the first electrode complex 19 is connected to the first terminal 15, the second electrode complex 20 is connected to the second terminal 14, and none of the additional layers 29 and 30 located at a radial end 31 and 32 of the storage element 16 is connected to the polarity terminal 15 or 14 opposite to the polarity terminal to which the electrode complex adjacent to said additional layers 29 and 30 is connected. .
- FIG. 4 shows the storage element 16 according to another embodiment of the invention.
- the storage element 16 is said to be "stacked".
- the storage element 16 comprises a stack of several elementary sequences 17 in a stacking direction 35.
- the stacking direction 35 coincides with the superposition direction 21, when the elementary sequences 17 are stacked.
- the first electrode complex 19 of an elementary sequence 17 of a stack m interacts with the second electrode complex 20 of the elementary sequence 17 of the same stack m, but also with the second electrode complex 20 of the elementary sequence 17 of the stack m-1.
- the second electrode complex 20 of an elementary sequence 17 of a stack m interacts with the first electrode complex 19 of the sequence elementary 17 of the same stack m, but also with the first electrode complex 19 of the elementary sequence 17 of the stack m + 1.
- the collector 24 of the first electrode complex 19 and the collector 25 of the second electrode complex 20 of each elementary sequence 17 protrude with respect to the electrode layers 22 and 23 in an opposite direction, perpendicular to the superposition direction 21 .
- the collector 24 of the first electrode complex 19 projects towards the first terminal
- the collector 25 of the second electrode complex 20 projects towards the second terminal, when the storage element 16 is positioned at the first terminal. inside an outer envelope.
- the connection of the collectors 24 and 25 to their respective terminals is easier.
- the storage element 16 also comprises additional layers 29 and 30 respectively at each of the ends 31 and 32 of the stack in the stacking direction 35.
- the storage element 16 comprises at the first end 31 in the stacking direction 35 three additional layers 29, including the first end 31 to the second end 32 in the direction of superposition 35, an electrode complex, a plastic separator and an electrode complex.
- the storage element 16 comprises at the second end 32 in the superposition direction 35 two additional layers 30, including from the second end 32 to the first end 31 in the superimposition direction 35, an electrode complex and a separator. plastic material.
- the electrode complexes forming the additional layers 29 and 30 are arranged so that the collector protrudes on the same side as in the electrode complex 19 or 20 of the elementary cell 18 adjacent to the additional layers 29 and 30. They can thus be connected to the same terminal 14 or 15 as said electrode complex of the elementary cell 18 or connected to any of the terminals 14 or 15 but can not be connected to the terminal of opposite polarity, which makes it possible to avoid short circuits.
- the manufacture of the stacked storage element 16 proceeds according to the following method.
- the first electrode complex 19, the first separator 26 and the second electrode complex 20 are stacked in the stacking direction 35, so as to form the elementary cell 18.
- the second separator 27 is stacked on the second electrode complex 20 in the stacking direction 35, during a second step, so as to form the elementary sequence 17.
- the first and second steps are repeated several times, so as to form the stack of several elementary sequences 17.
- 29 and 30 are stacked in the stacking direction 35 at the first end 31 and / or the second end 32 in the stacking direction 35.
- the additional layers 29 of the first end 31 in the stacking direction 35 are stacked together before the first step. Then, during the first step, the first electrode complex 19, the first separator 26 and the second electrode complex 20 are stacked in the stacking direction 35 on the additional layers 29 of the first end 31.
- the storage element 16 is put in place in the outer envelope 11, and in a fifth step, the storage element 16 is electrically connected to the first and at the second electrical terminal 15 and 14, so that the first electrode complexes 19 are connected to the first terminal 15, the second electrode complexes 20 are connected to the second terminal 14, and that no additional layers 29 and
- the storage elements 16 previously described have the advantage of being provided with the additional layers 29 and 30 which can not enter short circuit neither between them nor with the electrode complex 19 or 20 of the elementary cell 18 adjacent to said additional layers in case of shrinkage of the layers of plastic separator, and which form a heat shield limiting the shrinkage of the separator layers 26 and 27 of plastic material or elementary sequences 17 when heating the storage element 16.
- additional layers 29 and / or 30 could notably not be in accordance with what has been described.
- the additional layers 29 and / or 30 could for example comprise the same components, or an additional layer 29 or 30 could be constituted by a single electrode without a collector or by a single collector,
- the additional layers 29 and / or 30 could be present just at one end 31 or 32 of the storage element 26,
- the storage element 16 could be constituted differently, for example the electrode complexes 19 and / or 20 could comprise only one electrode, a collector being attached to it outside the stack,
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1450100A FR3016241A1 (fr) | 2014-01-07 | 2014-01-07 | Ensemble de stockage d'energie electrique, et procede de fabrication associe |
PCT/EP2015/050119 WO2015104269A1 (fr) | 2014-01-07 | 2015-01-06 | Ensemble de stockage d'energie electrique, et procede de fabrication associe |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3092655A1 true EP3092655A1 (fr) | 2016-11-16 |
Family
ID=50290120
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15700428.4A Withdrawn EP3092655A1 (fr) | 2014-01-07 | 2015-01-06 | Ensemble de stockage d'energie electrique, et procede de fabrication associe |
Country Status (4)
Country | Link |
---|---|
US (1) | US20160336567A1 (fr) |
EP (1) | EP3092655A1 (fr) |
FR (1) | FR3016241A1 (fr) |
WO (1) | WO2015104269A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102031605B1 (ko) | 2017-01-11 | 2019-10-14 | 주식회사 엘지화학 | 단락 방지 부재를 포함하고 있는 3전극 시스템용 전극전위 측정 장치 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100412093B1 (ko) * | 2001-10-16 | 2003-12-24 | 삼성에스디아이 주식회사 | 2차 전지의 전극 젤리 롤 |
KR100563055B1 (ko) * | 2003-08-19 | 2006-03-24 | 삼성에스디아이 주식회사 | 권취형 전극 조립체 및 이를 구비한 이차 전지 |
KR20120025619A (ko) * | 2007-05-10 | 2012-03-15 | 히다치 막셀 에너지 가부시키가이샤 | 전기 화학 소자 |
JP2012114066A (ja) * | 2010-11-02 | 2012-06-14 | Sharp Corp | 二次電池 |
JP5656069B2 (ja) * | 2010-12-13 | 2015-01-21 | ソニー株式会社 | 二次電池、電池パック、電子機器、電動工具、電動車両および電力貯蔵システム |
US9289611B2 (en) * | 2011-11-22 | 2016-03-22 | Medtronic, Inc. | Electrochemical cell with adjacent cathodes |
-
2014
- 2014-01-07 FR FR1450100A patent/FR3016241A1/fr not_active Withdrawn
-
2015
- 2015-01-06 EP EP15700428.4A patent/EP3092655A1/fr not_active Withdrawn
- 2015-01-06 US US15/110,387 patent/US20160336567A1/en not_active Abandoned
- 2015-01-06 WO PCT/EP2015/050119 patent/WO2015104269A1/fr active Application Filing
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2015104269A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2015104269A1 (fr) | 2015-07-16 |
US20160336567A1 (en) | 2016-11-17 |
FR3016241A1 (fr) | 2015-07-10 |
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