EP4348745A1 - Rundzelle, batteriemodul und fahrzeug - Google Patents
Rundzelle, batteriemodul und fahrzeugInfo
- Publication number
- EP4348745A1 EP4348745A1 EP22725824.1A EP22725824A EP4348745A1 EP 4348745 A1 EP4348745 A1 EP 4348745A1 EP 22725824 A EP22725824 A EP 22725824A EP 4348745 A1 EP4348745 A1 EP 4348745A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cell
- negative pole
- round cell
- round
- battery module
- 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- Withdrawn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
- 239000000463 material Substances 0.000 claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 8
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 101150038956 cup-4 gene Proteins 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing 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
- H01M10/0422—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
- 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
- H01M50/155—Lids or covers characterised by the material
- H01M50/157—Inorganic material
- H01M50/159—Metals
-
- 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
- H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
- H01M50/522—Inorganic material
-
- 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
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- 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
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
-
- 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
- H01M50/545—Terminals formed by the casing of the cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/562—Terminals characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/564—Terminals characterised by their manufacturing process
- H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the invention relates to a round cell of the type defined in more detail in the preamble of claim 1, as well as a battery module and a vehicle.
- Battery-powered vehicles store the electricity required by electric motors in a so-called traction battery.
- a traction battery can include one or more battery modules.
- Such a battery module in turn typically includes a large number of individual galvanic cells.
- a galvanic cell that is used particularly frequently to form traction batteries is the so-called round cell. This consists of a metal cup enclosing a cell coil and a lid sealing the cup against the environment. Typically, the cup and the lid each form a battery pole.
- the cup can form both the positive pole and the negative pole of the round cell.
- the lid can also have the plus or
- the positive pole is usually made of aluminum and the negative pole is made of copper, steel or nickel-plated steel.
- the round cells are connected via so-called cell connectors.
- the cell connectors are mostly made of aluminum manufactured. Since copper and aluminum are difficult to connect, for example by means of welding, a process for connecting a plurality of round cells is particularly complex and expensive, and there is a risk that individual contacts will be of poor quality. This can lead to the contacts coming loose during operation or to an excessively high electrical resistance between two cells connected via a cell connector.
- the present invention is based on the object of specifying an improved round cell which can be connected in parallel and/or in series with other round cells in a particularly reliable manner, which is particularly light and which can be installed easily and inexpensively.
- this object is achieved by a round cell having the features of claim 1.
- Advantageous refinements and developments as well as a battery module with such a round cell and a vehicle with such a battery module result from the dependent claims.
- contact points of the positive pole and the negative pole that reach towards the outside of the cell comprise aluminum or an aluminum alloy.
- the round cell according to the invention has a positive pole and a negative pole made from the same material.
- aluminum is also used to form cell connectors.
- the round cell according to the invention can thus be connected up in a particularly simple, cost-effective and reliable manner.
- a cell connector can be welded to such a round cell. Any pairing of materials that occurs is always aluminum on aluminum. This enables a particularly simple welding process and enables reliable welded joints to be produced. This allows cell connectors to be designed in a geometrically simpler and more compact manner. Weight can be saved by reducing material.
- An advantageous development of the round cell provides that the contact point of the negative pole, which reaches into the interior of the cell, comprises copper or a copper alloy.
- the cell coil included in a round cell typically includes one or more copper foils.
- a copper collector of the cell winding is connected to a negative pole containing aluminum inside the round cell.
- a material transition of the negative pole lies within a cover assembly.
- the negative pole can be made comparatively compact, which means that the weight of the round cell can be reduced.
- Battery modules and traction batteries can thus be designed more easily, as a result of which the energy consumption of a vehicle during operation can be reduced.
- An electrically non-conductive seal can be fitted between the cover assembly and the negative pole for insulation.
- a further advantageous embodiment of the round cell also provides that the negative pole is made from at least two individual parts which are joined by friction welding or casting.
- the part of the negative pole made of copper and the part of the negative pole made of aluminum can be connected particularly easily and reliably by friction welding and casting.
- friction welding is suitable for large-scale production.
- the negative pole is preferably set up to have an electrical resistance within a defined tolerance range for at least 10 years. Aging can increase the electrical resistance of individual electronic components over time. A power delivered by a battery module thus falls. Such a drop in performance must be prevented as far as possible.
- Appropriate protective measures can slow down the aging process of the negative pole, i.e. the material combination of copper and aluminum. This prevents the resistance of the negative pole from increasing too quickly.
- the specified tolerance range can correspond to a value of 0.1 ohms per year, for example.
- the round cell according to the invention is designed in such a way that sufficient mechanical strength or resilience is ensured for the intended service life.
- a battery module comprises at least one round cell as described above.
- a vehicle preferably includes a battery module with at least one such round cell.
- the vehicle can be any vehicle such as a car, van, bus, construction machine or the like.
- the vehicle can be designed as a purely battery-powered vehicle or as a hybrid vehicle.
- the hybrid vehicle in turn, can also be designed as a plug-in hybrid. In such a vehicle, the traction battery can be used reliably over a comparatively long service life range.
- the only figure shows a schematic sectional view through a round cell according to the invention in a partially exploded view.
- the only attached figure 1 shows a round cell 1 according to the invention.
- This comprises a cup 4 which encloses a cell coil 5 in some areas.
- the cup 4 has an opening on one end, which is closed by a cover assembly 2 .
- the representation of the figure shows a partially exploded round cell 1, in which the cover assembly 2 is shown lifted from the cup 4.
- the cup 4 and the cover assembly 2 are made of aluminum and form a positive pole +.
- a negative pole - the round cell 1 is formed by two items 3.1 and 3.2.
- the two individual parts 3.1 and 3.2 are let into the cover assembly 2 via a seal 6 for electrical insulation.
- a first individual part 3.1 comprises aluminum or an aluminum alloy and is oriented towards the outside of the cell.
- a second individual part 3.2 comprises copper or a copper alloy and is oriented in the direction of the interior of the cell.
- the second item 3.2 is electrically conductively connected to a copper collector 7 of the cell coil 5 .
- the contact between the copper conductor 7 and the second individual part 3.2 can be produced, for example, by welding.
- a cell connector 8 comprising aluminum or an aluminum alloy is electrically conductively contacted with the first individual part 3.1. This contact can also be made, for example, by welding.
- a cell connector 8 is also electrically conductively contacted with the positive pole + of the round cell 1.
- the positive cell connector 8 is connected to the lid assembly 2 . In general, however, it is also possible for the positive pole + to be in contact with a corresponding cell connector 8 in the area of the cup 4 .
- round cells 1 can be connected up in a particularly simple, cost-effective and reliable manner. Since both the positive pole + and the negative pole - include the same material, work steps for connecting a plurality of round cells 1 can be simplified. In addition, only pairs of materials made of the same material are required, which are easier to produce than pairs of materials made of different materials and which can also be designed to be more reliable both mechanically and electrically conductively.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Aviation & Aerospace Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021002756.6A DE102021002756A1 (de) | 2021-05-27 | 2021-05-27 | Rundzelle, Batteriemodul und Fahrzeug |
| PCT/EP2022/061111 WO2022248144A1 (de) | 2021-05-27 | 2022-04-26 | Rundzelle, batteriemodul und fahrzeug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4348745A1 true EP4348745A1 (de) | 2024-04-10 |
Family
ID=76542875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22725824.1A Withdrawn EP4348745A1 (de) | 2021-05-27 | 2022-04-26 | Rundzelle, batteriemodul und fahrzeug |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4348745A1 (de) |
| DE (1) | DE102021002756A1 (de) |
| WO (1) | WO2022248144A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118786561A (zh) * | 2022-11-04 | 2024-10-15 | 宁德时代新能源科技股份有限公司 | 端盖、电池单体、电池和用电设备 |
| CN116111290B (zh) * | 2023-03-01 | 2023-10-13 | 温州宏丰电工合金股份有限公司 | 铜铝复合极柱组件及其制备方法和电池 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017211112A1 (de) * | 2017-06-30 | 2019-01-03 | Robert Bosch Gmbh | Batteriezelle |
| CN108428821B (zh) * | 2017-08-30 | 2024-05-10 | 宁德时代新能源科技股份有限公司 | 二次电池以及电池模组 |
| CN107658417A (zh) * | 2017-09-20 | 2018-02-02 | 深圳市宝利通电子有限公司 | 动力电池负极柱及其生产方法 |
| CN110993876A (zh) * | 2019-12-24 | 2020-04-10 | 烟台孚信达双金属股份有限公司 | 一种锂电池极耳连接用铜铝复合端子及其制备方法 |
| CN112821015A (zh) * | 2021-03-05 | 2021-05-18 | 烯晶碳能电子科技无锡有限公司 | 铜铝复合的极柱、负极盖板组件结构及储能单元 |
-
2021
- 2021-05-27 DE DE102021002756.6A patent/DE102021002756A1/de active Pending
-
2022
- 2022-04-26 WO PCT/EP2022/061111 patent/WO2022248144A1/de not_active Ceased
- 2022-04-26 EP EP22725824.1A patent/EP4348745A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021002756A1 (de) | 2021-07-15 |
| WO2022248144A1 (de) | 2022-12-01 |
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