EP3732742A1 - Batterie und verfahren zum herstellen einer batterie - Google Patents
Batterie und verfahren zum herstellen einer batterieInfo
- Publication number
- EP3732742A1 EP3732742A1 EP19714093.2A EP19714093A EP3732742A1 EP 3732742 A1 EP3732742 A1 EP 3732742A1 EP 19714093 A EP19714093 A EP 19714093A EP 3732742 A1 EP3732742 A1 EP 3732742A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- battery
- electrode layers
- contact
- cover plate
- contact lugs
- 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- Withdrawn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 15
- 238000003466 welding Methods 0.000 claims description 70
- 239000000463 material Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 239000004020 conductor Substances 0.000 abstract description 6
- 239000010949 copper Substances 0.000 description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 12
- 229910052782 aluminium Inorganic materials 0.000 description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 229910052802 copper Inorganic materials 0.000 description 11
- 239000011888 foil Substances 0.000 description 7
- 239000010408 film Substances 0.000 description 6
- 239000012212 insulator Substances 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000011244 liquid electrolyte Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000002482 conductive additive Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000011262 electrochemically active material Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 235000011837 pasties Nutrition 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000011232 storage material Substances 0.000 description 2
- 210000003371 toe Anatomy 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000010792 warming Methods 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
-
- 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
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the invention relates to a battery and a method for manufacturing a battery.
- a battery has terminals for transporting electrical energy or in an electrochemical energy storage, which on a
- Gleichpolige electrodes are contacted together and electrically connected to the corresponding terminal.
- Embodiments of the present invention may advantageously enable a required length of tabs for electrically contacting electrodes of an energy storage of a battery to be shortened as compared to conventional implementations of batteries, thereby reducing electrical resistance of the tabs.
- An electric current flow through the contact lugs thereby leads to a reduced, in particular in a rapid discharge of the cell
- a battery which has a prismatic housing and a cell stack with electrode layers of different polarity, each of which has at least one contact lug projecting over an active area of the electrode layer for electrically contacting the electrode layer, wherein the contact lugs of the same pole electrode layers are arranged aligned with one another and at least one each two gleichpoligen contact lobe bundles are combined with a substantially equal number of gleichpoliger contact lugs, wherein the gleichpoligen electrode layers are electrically connected via the corresponding gleichpoligen contact lug bundles and a pressure welding connection with a corresponding arrester of the housing.
- a method for producing a battery comprising the following steps:
- Electrode layers are arranged aligned with each other;
- a battery can be understood as an accumulator or a secondary battery for storing and re-supplying electrical energy.
- the electrical energy can be in a cell stack of stacked individual cells
- the cell stack can be called a stack.
- the electrical energy can be conducted via electrically conductive electrode layers into the cell stack or out of the cell stack.
- a single cell is formed in each case between two different pole electrode layers of the cell stack.
- the electrode layers of a single cell are therefore assigned to different electrical poles of the battery.
- the different pole electrode layers may have different electrically conductive materials. For example, the
- a single cell can be called an elementary stack. In an elementary stack there are always double coatings. An electrode layer is therefore coated on both sides with the same material. This results in a sequence of an anode layer, copper Cu, another anode layer, a separator, a cathode layer, aluminum Al and another cathode layer.
- the layer structure of the individual electrodes consists of a carrier film on which the electrochemically active layer is applied.
- the carrier foil is made, for example, of copper Cu or another electrochemically stable electron conductor at the anode potential.
- the support film is made of aluminum Al or another electrochemically stable on the cathode potential
- the electrochemically active layer is a porous layer of memory material and an electronically conductive additive.
- the layer is porous to receive lithium ions as a conductive liquid electrolyte.
- a solid state cell without porosity and separator can be constructed.
- the solid-state cell can be a lithium ion-conducting solid electrolyte and both lithium ion-conducting additives and electronically conductive additives in both electrodes together with the
- the different electrode layers on active surfaces carry different electrochemically active materials for storing the electrical energy.
- the electrode layers are electrically isolated from each other.
- the electrode layers are arranged parallel to each other with uniform intervals.
- the electrode layers have electrically conductive
- the contact lugs without electrochemically active materials.
- the contact lugs overflow over the active surfaces.
- the tabs are integral with the
- Electrode layers formed, for example, from a common metal foil.
- Gleichpolige contact lugs are summarized to at least two contact lobe bundles. Two homopolar ones
- Contact bundles form a double bundle.
- One polarity can also be equipped with a single bundle of all the same pole contact lugs and the other polarity can be equipped with a double bundle.
- the cell stack has at least four
- a contact tab bundle may be connected to a welding surface for establishing an electrically conductive connection of the contact tabs with each other other Gleichpoligen contact lug bundles and to the arrester are summarized.
- the battery cells can have one or two terminals.
- the cell housing carries the other polarity.
- the housing can be neutral, at a floating potential or floating potential or at one polarity.
- a housing may be a solid shell to protect the cell stack.
- the housing In contrast to so-called pouch battery cells, in which the cell stack is surrounded by a flexible film, the housing is substantially dimensionally stable, i. the enclosed by the housing volume changes at most insignificant in normal operation of the battery cell, for example, less than 10% or less than 5% or 2%.
- a prismatic housing may for example have a rectangular base.
- An arrester may be an electrically conductive part of the housing, at which the electrical energy can be tapped on an outside of the battery. The two arresters of the battery are electrically isolated from each other. The approach presented here can also be used in a pouch cell.
- Press welding can be, for example, ultrasonic welding or friction welding.
- pressure welding at least two materials are heated by pressure and friction until they are at least pasty and mixed together in pasty state.
- An energy necessary for welding the materials is thus provided predominantly in the form of mechanical energy during pressure welding.
- the ultrasonic welding allows, inter alia, an advantageous process control and / or advantageous welding results.
- the materials to be welded are gently heated and not too high temperatures.
- several contact lugs can be welded together and / or with the arrester of the housing in a common process step.
- the film connection can also be made by other methods, such as gluing, laser welding, crimping, soldering or compression. Everything that creates a mechanically stable connection with homogeneously low resistance between the foils and the arrester can be used.
- the cell stack may have at least two partial stacks stacked on top of one another.
- Each partial stack can have at least two different-pole contact lug bundles.
- the two partial stacks can be stacked first and the
- Contact flags are bundled.
- the prefabricated partial stacks can be added to the cell stack be joined together.
- the contact lugs bundles can be made easier.
- two different pole electrode layers can form a single cell of the cell stack.
- the two opposite to each other on the separation plane, to extremely lying electrode position of the two partial stacks may have different polarities, so that they form a single cell of the battery.
- two gleichpolige electrode layers may be arranged adjacent to the parting plane.
- the parting plane may represent the middle of the cell stack if the part stacks have the same number of electrode layers.
- Corresponding Gleichpolige electrode layers of the two sub-stacks can be integrally connected via their contact lugs.
- One of the partial stacks can be folded onto the other partial stacks, so that the electrode layers of the two partial stacks are arranged parallel to the dividing plane and the partial stacks face each other.
- the partial stacks can be stacked at the same time.
- Each pair of contact lug bundles may have a common welding surface. Material can be saved at the welding area, as half of the layers to be welded are eliminated.
- the housing may have a cover assembly with a cover plate and an electrically insulated from the cover plate terminal bushing.
- the cover plate can form the one arrester of the battery.
- the terminal bushing can form the other end of the battery.
- the terminal bushing is electrically insulated from the cover plate.
- the terminal bushing can be arranged in a recess of the cover plate.
- the terminal bushing may have two different, roll-clad materials.
- a heterogeneous low-resistance compound of the materials is challenging. To keep the electrical resistance low becomes one
- Different materials can fulfill different tasks. For example, one of the materials for pressure welding of
- Contact Flags bundle be particularly well suited.
- at least one of the materials may be required to prevent corrosion and / or electrocorrosion.
- the materials may be metal materials. For example, copper or a copper alloy and aluminum or a
- Aluminum alloy be roll-plated with each other.
- Terminal feedthrough may be aligned transversely to a plane of the electrode layers and arranged substantially equal in height.
- the welding surfaces may have a height offset from one another. Then those with the
- the welding surfaces can be part of
- the terminal bushing can be embedded in a large area in the cover plate.
- the terminal bushing may have a patch on the inside of the cover plate contact plate.
- Figures la to ld show an illustration of a production process of a battery according to an embodiment
- Fig. 2 shows a sectional view through a pressure-welded connection to a battery according to an embodiment
- 3 shows a representation of a pressure welding method on a battery according to an exemplary embodiment
- FIGS. 4 a to 4 f show a representation of a production sequence of a battery according to one exemplary embodiment
- FIGS. 5a to 5d show an illustration of a production sequence of a battery according to one exemplary embodiment.
- An internal short circuit of a battery cell such as by penetration of a nail, by a conductive particle or by overstressing the cell at e.g.
- An incidence leads to an internal generation of heat, which can lead to thermal runaway of the battery toe and to a risk of explosion.
- a fast discharge device transfers the heat to an outside of a cell stack of the battery cell and creates a permanent bypass to the defective battery cell.
- the fast discharge device thus reduces the heat input in the stack.
- a vehicle in particular an electric vehicle, does not maintain any damage to a battery cell.
- the integration of the rapid discharge device alters the cell design with respect to a contacting of the cell stack, since an electrical resistance is very critical. Also, the integration of the quick-charging device changes a volume-related
- the cell stack connection by tabs of the electrodes ensures electrical current flow from and to the electrode current collecting foils to and from the terminals of the battery cell during normal cyclic operation and rapid discharge.
- the tabs are projections of the copper or aluminum current collecting foils of the anode and cathode layers, respectively, of defined but variable length.
- the tabs are bundled and welded to the terminal.
- a free length of the contact lugs should be as low as possible, for example 5 mm.
- the free length indicates the length between the active (coated) area and the welding point to the terminal.
- the free length of the contact lugs can be reduced by approximately 50 percent.
- an average free length of 10 mm can be reduced to 5 mm. So the electrical resistance of the contact lugs can also order
- FIGS. la to ld show an illustration of a production process of a battery 100 according to an embodiment.
- a battery 100 is manufactured with a prismatic housing 102 which forms a cell stack 104 of different poles
- Electrodes 106 and required for the operation between the electrode layers 106 arranged separator layers.
- the electrode layers 106 are thus assigned to the two electrical poles of the battery 100.
- the electrode layers 106 of the one pole are oxidized and act as anodes during discharge of the battery 100. These electrode layers 106 may be referred to as anode layers.
- Electrode layers 106 of the other pole are reduced and act as cathodes during discharge. These electrode layers 106 may be referred to as cathode layers.
- the anode layers and cathode layers alternate in the cell stack 104.
- On an active surface 108, the anode layers have anode material.
- the cathode layers have cathode material on their active surface 108.
- Electrode layers 106 are electrically conductive.
- the electrode layers 106 are metal foils with active material deposited thereon.
- Each electrode layer 106 has at least one contact lug 110 protruding beyond the active surface 108 for electrically contacting the electrode layer 106.
- the contact lugs 110 of different pole electrode layers 106 are arranged at different positions of the cell stack 104.
- the active area 108 is rectangular here.
- the individual electrode layers 106 are stacked so that edges of the active surface 108 are substantially congruent.
- the contact lugs 110 of the same pole electrode layers 106 are arranged aligned with each other.
- the contact lugs 110 of different pole electrode layers 106 do not overlap.
- the contact lugs 110 are arranged alongside one another along one side of the cell stack 104.
- the contact lugs 110 of the same pole electrode layers 106 are each combined with at least two identically polar contact lug bundles 112. Each tabular array 112 has substantially the same number of common pole tabs 110. Here, each contact lug bundle 112 each half of the gleichpoligen contact lugs 110.
- the Gleichpoligen electrode layers 106 are electrically connected via the corresponding gleichpoligen contact lugs bundle 112 and a pressure welded connection 114 with a corresponding arrester 116 of the housing 102.
- Lid assembly 118 provides both outlets 116 of battery 100.
- a terminal feedthrough 120 is electrically insulated as a first arrester 116 in a cover plate 122 of the cover assembly 118 embedded.
- the terminal bushing 120 thus provides a electrically isolated from the rest of the housing 102 electrically conductive connection through the cover plate 122 ready.
- the rest of the housing 102, in particular the cover plate 122 is also electrically conductive, is at the other potential and acts as a second arrester 116 of the battery 100th
- a first partial stack 124 of the cell stack 104 is shown with the lid assembly 118.
- the partial stack 124 here comprises half of the electrode layers 106 of the cell stack 104.
- the contact lugs 110 of the partial stack 124 are two
- Contact tabs 112 are arranged side by side along one side of the sub-stack 124.
- Electrode layers 106 are angled toward the center of the sub-stack 124 out. The closer an electrode layer 106 is arranged at the center, the less the associated contact lug 110 is angled.
- the contact lugs 110 of the respective contact lug bundle 112 touch and form from there a welding surface 126 for the pressure-welded connection 114.
- the distance is as small as possible. The distance is determined by the geometry, necessary strain reliefs or a film stability and requirements with regard to coating edge load. The distance determines the critical length for the resistance path. In the area of the welding surfaces 126, the contact lugs 110 lie flat against one another. Likewise, there may be a line connection.
- the welding surfaces 126 are angled relative to a plane of the electrode layers 106.
- the partial stack 124 and the cover assembly 118 are aligned with each other so that the welding surfaces 126 are each disposed over one of the arresters 116.
- the partial stack 124 is aligned obliquely to the cover assembly 118 to a space above the
- the welding surfaces 126 are aligned parallel to surfaces of the arresters 116. In other welding processes u.U. not necessary.
- a second partial stack 128 of the cell stack 104 is shown.
- the second partial stack 128 essentially corresponds to the first partial stack 124.
- the second partial stack 128 is also aligned so that its welding surfaces 126 are aligned with the deflectors 116.
- the welding surfaces 126 of the two partial stacks 124, 128 are arranged one above the other.
- the second sub-stack 128 is in the opposite direction as the first sub-stack 124 obliquely to the
- Lid assembly 118 aligned.
- the space above the welding surfaces 126 remains free.
- the second partial stack 128 is aligned symmetrically relative to the first partial stack 124 with respect to a plane perpendicular to the cover plate 122. This results in a minimum height offset according to the film bundle thickness of the first sub-stack 124th
- the welding surfaces 126 are connected to the underlying conductors 116 by a pressure welding process.
- a sonotrode 130 for one
- the sonotrode 130 is aligned with the welding surfaces 126 and presses the welding surfaces 126 and the respective arrester 116 against an unillustrated anvil.
- clock sound vibrations for a Uhraschallversch are coupled into the welding surfaces 126 to connect the gleichpoligen contact lugs 110 of the two gleichpoligen contact lugs bundle 112 of both sub-stacks 124, 128 with the respective arrester 116 electrically conductive and mechanical.
- the sonotrode 130 is shown on the welding surfaces 126 above the terminal duct 120.
- the other welding surfaces 126 to be connected to the cover plate 122 are either simultaneously housed using a different sonotrode or with a time delay
- the partial stacks 124, 128 are folded together and form the continuous cell stack 104.
- the collapsed cell stack 104 is connected to the
- Cover assembly 118 inserted into a non-illustrated residual housing to complete the housing 102.
- the lid assembly 118 is fluidly connected to the remainder of the housing to enclose the cell stack 104 and electrolyte required for operation of the battery 100, as many battery storage materials, conductive salts, and the like are included.
- the two partial stacks 124, 128 are constructed symmetrically relative to a parting plane 132 perpendicular to the cover plate 122.
- a parting plane 132 perpendicular to the cover plate 122.
- two identically polar electrode layers 106 adjoin one another.
- At least one of the partial stacks 124, 128 may also have an insulating sheath, in which case at least one layer of insulating material is arranged in the dividing plane 132.
- the two partial stacks 124, 128 are constructed asymmetrically to the dividing plane 132.
- different pole electrode layers 106 are arranged adjacent to each other in the parting plane and form an electrochemical single cell. Between the different poles
- Electrode layers 106 is arranged a separator layer.
- the single cell is characterized by different pole contact lugs 110 on different sides of the parting plane 132nd contacted.
- the entire cell stack 104 may be isolated from the housing 102 by an additional jacket.
- the structure of two double bundles does not lead to an energy density loss, but has exactly the same energy density as a stack built up from the outset with itself
- Figure 1 shows a battery 100 comprising two stacks of electrodes, said stacks comprising anodes and cathodes. From the anodes are flags of a first type. From the cathodes are flags of a second type. Said flags of the first type of the first stack are with said flags of the first type of the second stack using a welding technique, such as
- An additional anode layer or cathode layer is present when the stacks are constructed identically, wherein the additional layer does not contribute to the capacity of the battery 100.
- An optional release layer can be placed between the stacks if they are identical.
- the flags of the first type are shorter than the flags of the second type.
- An optional fast discharge path is disposed between said flags of the first type and said flags of the second type and forms a low electrical resistance electrical path.
- the flags are different in length, since a step between the terminal passage 120 and the inside of the lid 118 is to be bridged.
- the double bundling allows a homogeneous current distribution in the stack by approximately the same length flags.
- the unequal stack construction makes it possible to dispense with one layer, which leads to a higher energy density.
- the distance between the nominal length of the shortest flag to the longest flag is about halved, since the flag length is about halved.
- the two sub-stacks 124, 128 are connected together in the open state to make room for the sonotrode 130. After connecting and welding the contact lugs 110, the partial stacks 124, 128 become the cell stack 104 together. Both partial stacks 124, 128 can be isolated separately. The partial stacks 124, 128 may be insulated against the housing 102 after assembly. The ultrasonic welding can be replaced by another welding process.
- FIG. 2 shows a sectional illustration through a pressure-welded connection 114 on a battery 100 according to one exemplary embodiment.
- the battery 100 substantially corresponds to the battery in FIG. 1.
- the terminal feedthrough 120 is here glued into an opening in the cover plate 122.
- a circumferential adhesive joint 200 electrically isolates the two conductors 116 from one another and seals a gap between the terminal lead-through 120 and the cover plate 122.
- the terminal duct 120 is made of roll-clad material. In this case, two difficultly connectable metals have been compressed under high pressure until a connection between the metals at the lattice level has arisen. This is done from an electrochemical point of view, since a material which is stable at anode potential in the cell is required on the anode side. In the case of liquid electrolyte contact, ie contact with liquid electrolyte, this is, for example, copper or nickel. Aluminum is preferred on the outside of the cell because it is less expensive and more corrosion resistant.
- the terminal bushing 120 has copper on one side and aluminum on one side.
- the contact lugs 110 of the same-pole electrode layers 106 welded to the terminal bushing 120 by the pressure-welded connection 114 are likewise made of copper.
- the terminal bushing 120 is so long and wide that the welding surfaces 126 completely overhang and circumferentially remains a distance from the adhesive joint 200 remains.
- FIG. 3 shows a representation of a pressure welding method on a battery 100 according to one exemplary embodiment.
- the battery 100 substantially corresponds to the battery in Fig. 1.
- Fig. 1 in contrast to that shown in Fig. 1
- Cavity 300 having a substantially triangular cross-sectional area.
- a sonotrode 130 adapted to the cavity 300 is introduced into the cavity.
- the sonotrode 130 has a finger shape and a smaller one
- connection of the tabs 110 may be welded to the entire cell stack 104 using a special sonotrode 130 or alternative welding technology.
- FIGS. 4a to 4f show an illustration of a production sequence of a battery 100 according to one exemplary embodiment.
- the battery 100 corresponds in the
- the cover assembly 118 is here executed with a welded terminal bushing 120.
- Terminal bushing 120 has on the inside a contact plate 400 to
- the contact plate 400 provides the contact surface required for welding. For deriving the electrical current flow from the battery 100, only a smaller cross-sectional area compared to the contact surface is required. Therefore, the aperture through the cover plate 122 is smaller than the contact plate 400. In the aperture, only a pin 402 having a cross-sectional area required for mechanical strength and current carrying capacity is disposed. The cross-sectional area can be arbitrarily shaped.
- the pin 402 is held by a counterpart 404.
- Counterpart 404 is welded to pin 402 under bias. Between the inside of the cover plate 122 and the contact plate 400 and the outside of the cover plate 122 and the counterpart 404 electrically insulating insulators 406 are arranged made of a plastic material. In addition, the breakthrough is sealed by sealing rings, not shown here between the contact plate 400 and the cover plate 122 and / or between the cover plate 122 and the counterpart 404.
- the pin 402 is bonded by a friction welding process of two metal materials. As in FIG. 2, the terminal bushing 120 thus has a different material on the inside than on the outside.
- the partial stacks 124, 128 are arranged on a welding device 408.
- the Sch white device 408 has a support amount for each sub-stacks 124, 128.
- On the support slopes are the sub-stacks 124, 128 as the pages of an open book.
- the support ramps position the sub-stacks 124, 128 such that the weld surfaces 126 of the tab bundles 112 overlap.
- the pin 402 of the terminal lead-through 120 is arranged in a recess of an anvil 410 in FIG. 4 a.
- the contact plate 400 bears against a pressure surface of the anvil 410.
- the welding surfaces 126 of the one pole of the cell stack 104 are arranged between the sonotrode 130 and the terminal bushing 120 and are welded to the contact plate 400 by ultrasonic waves coupled in from the sonotrode 130 and pressure.
- Terminal feedthrough 120 connected.
- the terminal duct 120 can
- the cylindrical part comprises the roll-plated material.
- Aluminum part will later be welded to the aluminum terminal plate.
- Fig. 4b the welding surfaces 126 of the one pole are welded to the contact plate.
- the anvil 410 is removed and the inner insulator 406 and an unillustrated inner seal between the terminal bushing 120 and the cover plate 122 has been arranged.
- the pin 402 is arranged in the opening of the cover plate 122 and projects beyond the cover plate 122 on the outside.
- Terminal passage 120 inserted into the cover plate 122.
- the insulation is provided, for example, by cast or injection-molded plastic parts.
- the terminal bushing 120 is disposed in the recess of the plastic part so that the cylindrical part protrudes on the outside of the cover plate 122.
- the flat part sits in the recess.
- a flat anvil 410 is arranged on the cover plate 122.
- Welding surfaces 126 of the other pole of the cell stack 104 are arranged between the sonotrode 130 and the cover plate 122 and are welded to the cover plate 122 by ultrasonic waves coupled in from the sonotrode 130 and pressure.
- the cathode double bundle is connected to the cover plate 122.
- the anode contact lugs are connected to the copper surface of the
- Terminal feedthrough 120 welded.
- the cathode contact tabs are welded to the cover plate 122 made of aluminum. Because of the stage between the
- Copper surface and the aluminum surface of the cover plate 122 are the
- Cover plate 122 inserted. The seal seals the cover plate 122, the
- Terminal passage 120 and the cell interior against the external environment The terminal plate is inserted into the recess of the plastic part on the outside, so that electrical contact can be established between the cells.
- Terminal bushing 120 welded into the terminal plate.
- Fig. 4f the welding device 408 is removed and the sub-stacks 124, 128 are collapsed to form the one-piece cell stack 104. Subsequently, the cell stack 104 is inserted into the housing of the battery 100. In other words, in Fig. 4f, the cell stack 104 is assembled and the battery 100 is finally assembled.
- FIGS. 5a to 5d show an illustration of a production sequence of a battery 100 according to one exemplary embodiment.
- the battery 100 corresponds in the
- Intermediate pieces 500 inserted into corresponding recesses 502 of the arrester 116.
- the intermediate pieces 500 can act as feedthroughs through the cover assembly 118.
- the intermediate pieces 500 are electrically connected to the arresters 116.
- the intermediate pieces 500 and the arresters 116 are laser-welded.
- the double-band connection can also be made using an additional feeder that is part of the terminal or before or after
- the double bundles Connecting the double bundle is connected to the terminal.
- the double bundles can be welded essentially parallel to a stacking direction of the cell stack 104. This, however, consumes more space in the battery cell for electrical connection. However, welding can be done from outside the lid.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018203052.9A DE102018203052A1 (de) | 2018-03-01 | 2018-03-01 | Batterie und Verfahren zum Herstellen einer Batterie |
PCT/EP2019/055180 WO2019166641A1 (de) | 2018-03-01 | 2019-03-01 | Batterie und verfahren zum herstellen einer batterie |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3732742A1 true EP3732742A1 (de) | 2020-11-04 |
Family
ID=65955154
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19714093.2A Withdrawn EP3732742A1 (de) | 2018-03-01 | 2019-03-01 | Batterie und verfahren zum herstellen einer batterie |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3732742A1 (de) |
CN (1) | CN111801812A (de) |
DE (1) | DE102018203052A1 (de) |
WO (1) | WO2019166641A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020214832A1 (de) * | 2020-11-25 | 2022-05-25 | Volkswagen Aktiengesellschaft | Verfahren zur Herstellung einer Batteriezelle |
US20240332753A1 (en) * | 2021-08-18 | 2024-10-03 | Saft | Electrochemical assembly, corresponding electrochemical cell, battery and method of manufacturing |
DE102021122659A1 (de) | 2021-09-01 | 2023-03-02 | Volkswagen Aktiengesellschaft | Batteriezelle, Batterieanordnung und Verfahren zur Herstellung einer Batteriezelle |
FR3131100B1 (fr) * | 2021-12-21 | 2023-12-08 | Accumulateurs Fixes | Elément de batterie et procédé de fabrication associé |
JP2023154390A (ja) | 2022-04-06 | 2023-10-19 | 株式会社Aescジャパン | バッテリー |
EP4407780A1 (de) * | 2023-01-26 | 2024-07-31 | Automotive Cells Company SE | Prismatische batteriezellenbaugruppe mit zwei oder vier elektrodenstapeln |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002373639A (ja) * | 2001-06-13 | 2002-12-26 | Nec Tokin Tochigi Ltd | 密閉型電池およびその製造方法 |
JP5114036B2 (ja) * | 2006-09-08 | 2013-01-09 | Necエナジーデバイス株式会社 | 積層型電池の製造方法 |
CN102208591B (zh) * | 2010-03-30 | 2015-03-25 | 三星Sdi株式会社 | 二次电池和二次电池模块 |
JP6014837B2 (ja) * | 2011-03-30 | 2016-10-26 | 日立金属株式会社 | リチウムイオン電池用の負極端子および蓋部材、並びにリチウムイオン電池 |
JP5733252B2 (ja) * | 2012-03-27 | 2015-06-10 | 株式会社豊田自動織機 | 接続方法 |
WO2014003185A1 (ja) * | 2012-06-29 | 2014-01-03 | 新神戸電機株式会社 | 二次電池の集電構造 |
KR102284569B1 (ko) * | 2014-10-07 | 2021-08-03 | 삼성에스디아이 주식회사 | 이차 전지 및 그 제조 방법 |
JP6957837B2 (ja) * | 2016-04-08 | 2021-11-02 | 株式会社Gsユアサ | 蓄電素子 |
DE102016213221A1 (de) * | 2016-07-20 | 2018-01-25 | Robert Bosch Gmbh | Batteriezelle und Verfahren zur Herstellung einer Batteriezelle |
-
2018
- 2018-03-01 DE DE102018203052.9A patent/DE102018203052A1/de active Pending
-
2019
- 2019-03-01 CN CN201980016414.4A patent/CN111801812A/zh active Pending
- 2019-03-01 WO PCT/EP2019/055180 patent/WO2019166641A1/de unknown
- 2019-03-01 EP EP19714093.2A patent/EP3732742A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
WO2019166641A1 (de) | 2019-09-06 |
DE102018203052A1 (de) | 2019-09-05 |
CN111801812A (zh) | 2020-10-20 |
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