WO2022263096A1 - Batteriezelle und verfahren zur herstellung einer batteriezelle - Google Patents
Batteriezelle und verfahren zur herstellung einer batteriezelle Download PDFInfo
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- WO2022263096A1 WO2022263096A1 PCT/EP2022/063565 EP2022063565W WO2022263096A1 WO 2022263096 A1 WO2022263096 A1 WO 2022263096A1 EP 2022063565 W EP2022063565 W EP 2022063565W WO 2022263096 A1 WO2022263096 A1 WO 2022263096A1
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- Prior art keywords
- electrically conductive
- rod
- polarity
- electrically
- electrode
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 238000000034 method Methods 0.000 claims description 18
- 238000010292 electrical insulation Methods 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 24
- 229910052782 aluminium Inorganic materials 0.000 description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 18
- 229910000831 Steel Inorganic materials 0.000 description 17
- 239000010959 steel Substances 0.000 description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 16
- 239000010949 copper Substances 0.000 description 16
- 229910052802 copper Inorganic materials 0.000 description 16
- 229910052759 nickel Inorganic materials 0.000 description 12
- 238000003466 welding Methods 0.000 description 7
- 239000003792 electrolyte Substances 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 239000011149 active material Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000012212 insulator Substances 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910003455 mixed metal oxide Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
Classifications
-
- 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
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- 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
- H01M10/0422—Cells or battery with cylindrical 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/75—Wires, rods or strips
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/154—Lid or cover comprising an axial bore for receiving a central current collector
-
- 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
- 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
- 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
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/179—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for cells 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
Definitions
- the present invention relates to a battery cell and a method for producing a battery cell.
- Cylindrical, prismatic and pouch-shaped battery cells are primarily known in the field of battery cells, in particular lithium-ion battery cells.
- wound electrodes in particular can be installed in a cylindrical housing.
- the electrode ends can be connected to electrically conductive straps, often referred to as "current conductors", with which an electrical connection can be made to the outside of the cell, so that the electrical voltage of the battery cell can be tapped from the outside.
- the respective tab creates an electrical connection between electrodes of the same polarity, so that the respective polarity can be picked up on the tab from outside the battery cell.
- a current conductor which is electrically connected to the electrodes of a first polarity, can be electrically connected to the housing cover.
- Another current conductor which is connected to the electrodes of a second polarity opposite to the first polarity, can be electrically connected to the housing, with the housing cover and the housing being electrically insulated from one another.
- a current path runs via the housing, for example via its cylindrical housing wall.
- the present invention is based on the object of providing a cylindrical battery cell in which current conduction via the housing is avoided. This problem is solved according to the teaching of the independent claims. Various embodiments and developments of the invention are the subject matter of the dependent claims.
- a first aspect of the invention relates to a battery cell comprising: (i) a cylindrical cell housing with a hollow cylinder; (ii) a the hollow cylinder on one of its End faces terminating electrically conductive end plate with a first opening; (iii) at least one electrode of a first electrical polarity and at least one electrode of a second electrical polarity opposite to the first polarity, the electrodes of different polarity being separated from one another by at least one separator; (iv) an electrically conductive rod, which extends along a longitudinal axis of the hollow cylinder between the end faces of the hollow cylinder and up to the first opening, so that the rod can be electrically contacted from outside the cell housing at a first end of the rod through the first opening is.
- the at least one electrode of the first polarity is electrically connected to the end plate.
- the at least one electrode of the second polarity is electrically connected to the electrically conductive bar at a second end of the bar, different from the first end, the electrically conductive bar being electrically insulated from the electrically conductive end plate.
- This arrangement makes it possible for the current paths between the electrodes of the first polarity or the second polarity and the two externally tappable battery cell poles to be able to run inside the cell housing without running through the cell housing itself, which can reduce the risk that the current path of the cell housing builds up an electrical voltage with another electrically polarized component that comes into contact with the cell housing. Furthermore, when designing the cell housing, it is not necessary to take into account that the cell housing can act as a current path. For example, a material can be selected for the cell housing, regardless of a predetermined electrical conductivity.
- the terms “comprises,” “includes,” “includes,” “has,” “has,” “having,” or any other variant thereof, as appropriate, are intended to cover non-exclusive inclusion.
- a method or apparatus that includes or has a list of elements is not necessarily limited to those elements, but may include other elements that are not expressly listed or that are inherent in such method or apparatus.
- electrical conductivity or “electrically conductive” (and modifications thereof) is to be understood in particular as a physical variable that indicates how strong the ability of a substance is to conduct electricity.
- electrical conductivity in the context of the invention is therefore to be understood in particular as an electrical conductivity which (at 25° C.) is at least 106 S/m, ie at least corresponds to the conductivity of metals.
- electrical insulation is to be understood in particular as a physical variable that indicates how a specific body serving as an insulator at least largely prevents a current flow when an electrical voltage is applied.
- substances or bodies whose electrical conductivity is less than 10 -8 S/cm or which have a specific resistance of more than 108 W-cm are referred to as (electrical) insulators or (electrically) isolating.
- the battery cell has an electrically conductive connector disposed in the first opening and electrically connected to the first end of the post, the electrically conductive connector being electrically isolated from the end plate.
- the connection element can first be mounted on the end plate, and the electrical connection between the connection element and the rod can be carried out after the end plate has been fitted to the cell housing.
- the battery cell has a first electrically conductive intermediate plate with a second opening through which the rod extends, the first intermediate plate being arranged between the electrodes and the end plate, and the first intermediate plate having the at least an electrode of the first polarity and the end plate is electrically connected.
- the electrode of the first polarity can be electrically contacted via the first intermediate plate, and it is not necessary to connect the electrode directly to the end plate.
- the electrode of the first polarity can be electrically connected to the first intermediate plate outside the cell housing, and the electrode with the connected first intermediate plate can then be arranged in the cell housing. The electrical connection between the first intermediate plate and the end plate can take place after the end plate has been installed.
- the battery cell has a second electrically conductive intermediate plate which is electrically connected to the second end of the rod and the at least one electrode of the second polarity, the electrodes being arranged between the first and second intermediate plates.
- the electrodes of the second polarity can be electrically contacted by the rod via the second intermediate plate, and it is not necessary to connect the electrode directly to the rod.
- the electrode of the second polarity can be electrically connected to the second intermediate plate outside the cell housing, and the electrode with the connected second intermediate plate and the rod connected thereto can then be arranged in the cell housing. The electrical connection between the rod and the connecting element can be established after the end plate has been installed.
- the battery cell has an electrically conductive connecting element that is electrically and mechanically connected to the first intermediate plate and to the end plate.
- the electrically conductive connecting element can preferably be designed in one piece with the first intermediate plate as a mechanical unit. A one-piece design may have better stability and fewer manufacturing steps may be required for manufacture. It is also conceivable that the electrically conductive connecting element and the first intermediate plate are produced separately and mechanically connected at a later point in time. This can allow more flexibility in the design of the individual parts.
- the battery cell has a fastening element which is arranged on one end face of the hollow cylinder, the electrically conductive connecting element and the end plate being fastened to the fastening element and being electrically insulated from the fastening element.
- the fastening element enables both the end plate and the electrically conductive connecting element to be fastened to the fastening element.
- the electrically conductive connecting element and the end plate are electrically insulated from the fastening element. This can prevent the cell housing from being designed as a current path.
- the fastening element can in particular be formed integrally with the housing of the battery cell, in particular with the hollow cylinder.
- the fastening element has a ring with a groove
- the electrically conductive connecting element and the end plate each reach at least partially into the groove and form a positive connection with the groove and the electrical insulation. This allows the complete perimeter of the end plate to be fixed, resulting in high stability.
- the bar and the second intermediate plate form a mechanical unit that is formed in one piece. A one-piece design may have better stability and fewer manufacturing steps may be required for manufacture. It is also conceivable that the rod and the second intermediate plate are manufactured separately and mechanically connected at a later point in time. This can allow more flexibility in designing the individual parts.
- the battery cell has a base plate that closes off the hollow cylinder on its other end face and has a groove, in particular a circular arc-shaped groove, which defines a surface area of the base plate, so that the defined area can be broken out of the base plate when a force is applied.
- the defined area is broken out of the base plate by the gas pressure due to excess gas pressure in the cell housing, and the gas can escape from the cell housing.
- the cylindrical cell housing includes an electrically conductive material. This can be advantageous in order to be able to determine or measure which voltage is applied to the cell housing.
- a battery cell using the present invention conceivable that are technically easier to implement when the cell housing is electrically conductive. It is conceivable to refrain from electrical insulation between the cell housing and a negative electrode. Particularly in the case of a cell housing made of steel, in particular nickel, nickel-coated steel or stainless steel, electrical insulation between a negative electrode, which may have copper, or an intermediate plate electrically connected to this electrode, and the steel cell housing could be dispensed with . It is also conceivable to refrain from electrical insulation between the second intermediate plate and the cell housing.
- the rod has copper
- electrical insulation between the second intermediate plate and the base plate could be dispensed with.
- the cell housing is made of steel and the rod is made of aluminum
- electrical insulation between the first intermediate plate, which can be made of copper, and the end plate could be dispensed with. This is due to the electrochemical stability of metals.
- copper, nickel-coated steel or nickel or stainless steel can have sufficient electrochemical stability during operation when a negative potential is present. If there is a positive potential on an electrode that has aluminum, a passivating layer can form in combination with salts of an electrolyte.
- a second aspect of the invention relates to a method for producing a battery cell with the steps: (i) arranging at least one electrode of a first electrical polarity and at least one electrode of a second electrical polarity opposite to the first polarity in a cylindrical cell housing with a a hollow cylinder, wherein the hollow cylinder has a final electrically conductive end plate with a first opening on one of its end faces, the electrodes of different polarity being separated from one another by at least one separator; and wherein the electrodes and the separator have been wound around an electrically conductive rod, the rod extending along a longitudinal axis of the hollow cylinder between the end faces of the hollow cylinder and up to the first opening, so that the rod extends from outside the cell housing via a first end the rod can be electrically contacted through the first opening; (ii) Establishing an electrically conductive rod, the rod extending along a longitudinal axis of the hollow cylinder between the end faces of the hollow cylinder and up to the first opening, so that the rod extend
- FIG. 1 schematically shows a battery cell according to a first exemplary embodiment of the invention.
- FIG. 2 schematically shows a battery cell according to a second exemplary embodiment of the invention.
- 3A schematically shows a second intermediate plate with a mandrel in a side view.
- 3B schematically shows the second intermediate plate with the mandrel in a plan view.
- FIG. 4 schematically shows a bottom plate with a groove in a plan view.
- Fig. 5A-F show schematically some manufacturing steps for manufacturing the battery cell. 6 shows an illustrated flow diagram to illustrate a preferred embodiment of the method according to the invention.
- FIG. 1 schematically shows a battery cell 100 according to a first exemplary embodiment of the invention.
- the battery cell 100 has a cell housing 110 with a hollow cylinder 120 and an electrically conductive end plate 130 with a first opening 300 .
- An electrode coil 200 is arranged inside the hollow cylinder 120 .
- the electrode coil 200 has first electrodes 210 with a first polarity and second electrodes 220 with a second polarity, which is opposite to the first polarity.
- the electrode coil 200 is arranged in the cell housing 110 in such a way that electrodes of the first polarity 210 and electrodes of the second polarity 220 are arranged alternately in the radial direction.
- a separator 230 is arranged between the electrodes of the first polarity 210 and the electrodes of the second polarity 220, so that the electrodes of different polarity are electrically insulated from one another, with the separator 230 having an electrically insulating material.
- the first polarity electrodes 210 are surrounded by a first active material and the second polarity electrodes 220 are surrounded by a second active material.
- the anode can have graphite and be negatively poled.
- the cathode which is positively poled, can have mixed metal oxides with lithium.
- the lithium ions can move from the negative anode to the positive cathode through the separator, which can have a polymer.
- the electrodes 210, 220 with the surrounding active materials and the separator 130 are wrapped around an electrically conductive mandrel 240 around.
- the mandrel 240 extends along the longitudinal axis of the hollow cylinder 240.
- a third electrically insulating element 250 is arranged between the mandrel 240 and the electrode coil 200, as a result of which the electrode coil 200 is electrically insulated from the mandrel 240.
- a fourth electrically insulating element is arranged between the side walls of hollow cylinder 120 and electrode coil 200, and between a base plate 270 of cell housing 110 and electrode coil 200, whereby electrode coil 200 is connected to the side walls of hollow cylinder 120 and to the Bottom plate 270 is electrically isolated in each case.
- a first electrically conductive intermediate plate 280 is arranged between the end plate 130 and the electrode coil 200 .
- One of the electrodes of the first or second polarity 210, 220 are electrically connected to the first intermediate plate 280.
- the first intermediate plate 280 is electrically connected to the end plate 130 via an electrically conductive connecting element 190, which is designed radially symmetrically to the longitudinal axis of the hollow cylinder.
- the first electrically lei border intermediate plate 280 has a circular surface and a second opening 310 in the central area of its circular surface, through which the mandrel 240 extends.
- a fastening ring with a groove 140 is arranged on one of the end faces of the hollow cylinder 120 .
- the groove of the fastening ring 140 runs on the inside of the
- the fastening ring with the groove 140 is spaced apart from the hollow cylinder 120 by a circular groove 185 adjoining it in the axial direction.
- the circular groove 185 is radially symmetrical to the longitudinal axis of the hollow cylinder 120, with an opening of the circular groove 185 pointing away from the hollow cylinder 120 in the radial direction.
- the hollow cylinder 120, the circular groove 185 and the fastening ring with groove 140 can be formed in one piece or in several pieces.
- An edge area of the closing plate 130 and an edge area of the connecting element are fastened within the groove of the fastening ring 140 .
- a first electrically insulating element 150 is arranged in the groove, so that the end plate 130 and the connecting element 190 are electrically insulated from the fastening ring with the groove 140 .
- the end plate 130 has a circular surface, with the first opening 300 being arranged in the center of the surface, 12, 12.
- a rivet 160 in particular arranged a solid rivet.
- a second electrically insulating element 170 for example an electrically insulating layer made of plastic, is arranged between the rivet 160 and the end plate 130.
- a second electrically conductive intermediate plate 290 is arranged between the base plate 270 and the electrode coil 200, with the fourth electrically insulating element 260 being arranged between the second electrically conductive intermediate plate 290 and the base plate 270, so that the second electrically conductive intermediate plate 290 to the Bottom plate 270 is arranged electrically insulated.
- the other electrodes of the first or second polarity 210, 220 are electrically connected to the second intermediate plate 290.
- the second intermediate plate 290 has a circular surface.
- the second intermediate plate 290 is electrically and mechanically connected to the mandrel 240 in the center of the surface.
- the mandrel 240 and the second intermediate plate 290 can be made in one piece or in two pieces.
- a sleeve or a hollow cylinder can also be used instead of a dome.
- the mandrel 240 extends from the second intermediate plate 290, through the second opening 310 of the first intermediate plate 280 to the rivet 160, with which the mandrel 240 is electrically and mechanically connected.
- the base plate 270 is also provided in the base plate 270 .
- an arcuate groove 340 which encloses a region of the base plate 270 . If the gas pressure inside the battery cell 100 increases due to a malfunction, the piece bordered by the groove breaks out of the base plate 270 above a certain gas pressure, so that the gas can escape from the battery cell. Because the groove does not describe a complete circle, the broken-out piece remains connected to the base plate 270 and does not fall into the cell housing 110.
- the polarities of the electrodes 210, 220 are arranged such that on the End plate 130 an electrical minus pole is present, and this is also an anode.
- the end plate can have steel, stainless steel or copper coated with nickel.
- the first intermediate plate electrically connected to the termination plate 130 comprises copper.
- An electrical positive pole is connected to the connecting element 280, and this is also a cathode.
- the connection element 280 comprises aluminum.
- the mandrel 240 and the second intermediate plate 290 each have aluminum.
- the poles of the electrodes 210, 220 are arranged in such a way that an electrical positive pole is present on the end plate 130 and this is also a cathode.
- the end plate has aluminum.
- the first intermediate plate, which is electrically connected to the end plate 130 has aluminum.
- An electrical negative pole is present on the connection element 280, and this is also an anode.
- the connector 280 comprises nickel plated steel or copper.
- the mandrel 240 and the second intermediate plate 290 each have copper. Copper can be advantageous as the material for the mandrel 240, since the mandrel 240 can be made thinner or have thinner walls, and is therefore smaller and lighter. In addition, copper has a lower electrical resistance than aluminum.
- both the negative pole and the positive pole can be tapped on the same end face of the hollow cylinder 120 on the end plate 130 and the rivet 160 arranged in the first opening 300 of the end plate 130 so as to be electrically isolated from the end plate 130 .
- the current paths run inside the cell housing 110, but not via the cell housing 110.
- the use of the first electrically insulating element 150 can be advantageous here, in particular when the cell housing has steel and the potential of the cell housing 110 is to be neutral. Furthermore, the use of the first electrically insulating element 150 can be advantageous if the first intermediate plate 280 has aluminum. A mechanical and electrical contact between the cell housing 110 and the first intermediate plate 280 can lead to an unstable potential if the cell housing 110 has steel, in particular nickel, steel coated with nickel or stainless steel, and the first end plate 280 has aluminum.
- the use of the fourth electrically insulating element 260 can be advantageous, in particular if the cell housing 110 has steel and the second intermediate plate 290 has copper, but the potential of the cell housing 110 is to be neutral.
- the use of the fourth electrically insulating element 260 can be advantageous when the second intermediate plate 290 comprises aluminum, since mechanical and electrical contact between the cell housing 110 and the second intermediate plate 290 can lead to an unstable potential, particularly when the cell housing 110 comprises steel and the first end plate comprises 280 aluminum. It is also conceivable to dispense with the first electrically insulating element 150, in particular if the first electrode 210 has a negative polarity. Particularly when the cell housing 110 comprises steel, in particular nickel or steel coated with nickel, the first electrically insulating element 150, which is connected between the first intermediate plate 280, which is connected to the negative first electrode 210, which may comprise copper, and the cell housing 110 made of steel can be disregarded.
- the fourth electrically insulating element 260 which is arranged between the second intermediate plate 290 and the base plate 270.
- the fourth electrically insulating element 260 which is arranged between the second intermediate plate 290 and the base plate 270, can be dispensed with.
- the cell casing 110 comprises steel and the mandrel 240 comprises aluminum
- the first electrically insulating element 150 could also be omitted. This is due to the electrochemical stability of metals. In particular, copper, nickel-coated steel or nickel or stainless steel can have sufficient electrochemical stability during operation when a negative potential is present.
- a passivating layer can be formed in combination with salts of an electrolyte.
- the cell housing 110 it would be conceivable for the cell housing 110 to have aluminum. In this case, the cell housing 110 could be electrically connected to the second intermediate plate 290 if the second intermediate plate 290 also comprises aluminum.
- FIG. 2 schematically shows a battery cell 100 according to a second exemplary embodiment.
- the closing plate 130 has a sloping edge region which extends radially outwards and runs all around.
- the first intermediate plate 280 also has a sloping edge portion 190 extending outwardly of the circular surface.
- the sloping edge area 190 of the first intermediate plate 280 is electrically and mechanically connected to the sloping edge area of the end plate 330 .
- the inclined edge regions 330 , 190 point away from the hollow cylinder 120 in relation to the longitudinal axis of the hollow cylinder 120 .
- a slanted overhang 180 connects the hollow cylinder 120 to the mounting ring 140, the slanted overhang 180 forming one of the bounding side walls defining the mounting ring 140 groove.
- the beveled overhang 180 extends radially outwards from an outer wall of the hollow cylinder 120 on the end face of the end plate 130 .
- the fastening ring 140 has at least partially a diameter that is larger than a diameter of the hollow cylinder 120 in an area within which the electrode coil 200 is arranged.
- edge regions 190, 330 of the first intermediate plate 280 and the end plate 130 are arranged in the fastening ring 140, which is offset radially and axially compared to the first exemplary embodiment, increases in particular the distance in the axial direction between the electrodes - Winding 200 and the end plate 130. This increases the height of the battery cell 100, so that a higher and thus larger electrode winding 200 with more capacity in the cell housing 110 can be arranged.
- a distance can be formed between battery cells arranged next to one another. This spacing may allow lateral cooling to be placed between the battery cells.
- FIG. 3A schematically shows a second intermediate plate 290 with a mandrel 240 in a side view.
- the second intermediate plate 290 has a circular surface surface.
- a projection 320 is arranged in the central area of the surface.
- the mandrel 240 is connected electrically and mechanically to the second intermediate plate 290 at this projection 320, for example using a welding process.
- a sleeve can also be used.
- Mandrel 240 and second intermediate plate 290 may both be aluminum or both copper depending on the embodiment variants described in FIG.
- the mandrel 240 and the second intermediate plate 290 with the projection 320 can also be designed in one piece as a mechanical unit, for example by means of a deep-drawing process.
- FIG. 3B schematically shows the second intermediate plate 290 and the mandrel 240 in a plan view.
- FIG. 4 schematically shows a bottom plate 270 with a groove 340 in a plan view.
- the groove 340 is formed in the shape of a circular arc. If the gas pressure inside the cell housing 110 of the battery cell 100 increases due to a malfunction, the piece enclosed by the circular arc breaks out of the base plate 270 above a certain gas pressure, so that the gas can escape from the battery cell. Because the groove describes an arc of a circle and not a complete circle, the broken-out piece remains connected to the base plate 270 and does not fall into the cell housing 110.
- 5A-F schematically show some production steps for producing the battery cell according to FIG.
- FIG. 5A schematically shows an electrode coil 200, see the framed dashed area.
- the electrode coil 200 is formed by wrapping around a mandrel 240 a first electrode 210 having a first polarity, and a second electrode 220 having a second polarity, which is opposite to the first polarity, and a separator 230 disposed therebetween.
- the electrodes 210, 220 are each surrounded by an active material, one of the materials containing lithium, so that when the battery cell is charged or discharged, lithium ions move through the separator 230 from one electrode 210, 220 to the other electrode 210, 220 can move.
- a third electrically insulating element is arranged between the mandrel 240 and the electrode coil 200 , as a result of which the electrode coil 200 is electrically insulated from the mandrel 240 .
- FIG. 5B schematically shows the attachment of the second intermediate plate 290 described in FIGS. 1 and 2 to the one electrode 220 and to the mandrel 240. This can be done by means of a welding process, so that an electrical and integral connection is formed.
- the mandrel 240 and the second intermediate plate 290 are made of aluminum.
- FIG. 5C schematically shows the attachment of the first intermediate plate 280, described in FIG.
- the first intermediate plate 290 copper on.
- the first intermediate plate 280 has an edge region 190 which runs obliquely to the circular surface and points away from the electrode coil 200 in the assembled state.
- FIG. 5D schematically shows the attachment of the end plate 130.
- the edge area of the end plate 330 is electrically and mechanically connected to the edge area 190 of the first intermediate plate 280, for example by a welding process.
- a rivet 160 in particular a solid rivet, made of an electrically conductive material is arranged in the first opening 300 of the closing plate 130.
- a first electrically insulating element 150 is arranged between the rivet 160 and the end plate 130 .
- the rivet 160 is electrically and mechanically connected to the mandrel 240, for example by means of a welding process, with the welding device being located outside the cell housing.
- FIG. 5E schematically shows the arrangement of the electrode coil 200 according to FIG. 5D in the cell housing 110. Electrolyte 350 is also shown, which is filled into the cell housing 110 before the cell housing 110 is closed. After the electrolyte 350 has been filled, the electrode coil 200 according to FIG. 5D is moved in the direction of the base plate 270, corresponding to the direction of the arrow shown.
- Figure 5F shows a schematic of the final adjustment of the electrode coil 200.
- a form-fit connection of the end plate 130 with the fastening ring with a groove 140 is formed, with a first electrically insulating element 150 being arranged between the fastening ring with a groove 140 and the end plate 130 .
- FIG. 6 schematically shows an illustrated flowchart 400 to illustrate a preferred embodiment of the method according to the invention with the steps:
- Manufacture 410 of an electrode coil 200 by wrapping a first electrode 210 with a first polarity and a second electrode 220 with a second polarity, which is opposite to the first polarity, around a mandrel 240, with the difference between the polarized electrodes 210, 220, a separator 230 is arranged.
- the electrodes 210, 220 are each of an active Surrounded material, one of the materials having lithium, so that lithium ions can move through the separator 230 from one electrode 210, 220 to the other electrode 210, 220 when charging or discharging the battery cell.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
Claims
Priority Applications (1)
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CN202280042122.XA CN117480643A (zh) | 2021-06-18 | 2022-05-19 | 电池单体和用于制造电池单体的方法 |
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DE102021115798.6A DE102021115798A1 (de) | 2021-06-18 | 2021-06-18 | Batteriezelle und Verfahren zur Herstellung einer Batteriezelle |
DE102021115798.6 | 2021-06-18 |
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WO2022263096A1 true WO2022263096A1 (de) | 2022-12-22 |
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PCT/EP2022/063565 WO2022263096A1 (de) | 2021-06-18 | 2022-05-19 | Batteriezelle und verfahren zur herstellung einer batteriezelle |
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CN (1) | CN117480643A (de) |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080176133A1 (en) * | 2006-04-04 | 2008-07-24 | Sony Corporation | Anode and battery |
DE102008034696A1 (de) * | 2008-07-26 | 2010-01-28 | Daimler Ag | Batteriezelle mit einem Zellgehäuse und einem Folienwickel |
US7718310B1 (en) * | 2006-10-24 | 2010-05-18 | Greatbatch Ltd. | Electrochemical cell having a galaxy wind design |
KR20200035739A (ko) * | 2018-09-27 | 2020-04-06 | 삼성에스디아이 주식회사 | 이차 전지 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102008013188A1 (de) | 2008-03-07 | 2009-09-17 | Johnson Controls Hybrid And Recycling Gmbh | Elektrochemischer Akkumulator und Fahrzeug mit einem elektrochemischen Akkumulator |
-
2021
- 2021-06-18 DE DE102021115798.6A patent/DE102021115798A1/de active Pending
-
2022
- 2022-05-19 CN CN202280042122.XA patent/CN117480643A/zh active Pending
- 2022-05-19 WO PCT/EP2022/063565 patent/WO2022263096A1/de active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080176133A1 (en) * | 2006-04-04 | 2008-07-24 | Sony Corporation | Anode and battery |
US7718310B1 (en) * | 2006-10-24 | 2010-05-18 | Greatbatch Ltd. | Electrochemical cell having a galaxy wind design |
DE102008034696A1 (de) * | 2008-07-26 | 2010-01-28 | Daimler Ag | Batteriezelle mit einem Zellgehäuse und einem Folienwickel |
KR20200035739A (ko) * | 2018-09-27 | 2020-04-06 | 삼성에스디아이 주식회사 | 이차 전지 |
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DE102021115798A1 (de) | 2022-12-22 |
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