CN114583416A - Method for producing lithium ion battery cell and device therefor - Google Patents

Method for producing lithium ion battery cell and device therefor Download PDF

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Publication number
CN114583416A
CN114583416A CN202111440507.5A CN202111440507A CN114583416A CN 114583416 A CN114583416 A CN 114583416A CN 202111440507 A CN202111440507 A CN 202111440507A CN 114583416 A CN114583416 A CN 114583416A
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China
Prior art keywords
electrolyte component
ion battery
electrolyte
lithium ion
battery cell
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CN202111440507.5A
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Chinese (zh)
Inventor
T·达格
P·梅斯特
X·齐
C·波利
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Volkswagen AG
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Volkswagen AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • 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
    • H01M10/052—Li-accumulators
    • 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
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • 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
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/673—Containers for storing liquids; Delivery conduits therefor
    • 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
    • H01M50/70—Arrangements for stirring or circulating the electrolyte
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • 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
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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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)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)

Abstract

The invention relates to a method for producing a lithium ion battery cell (4), in particular a traction battery for an electric motor vehicle, wherein a first electrolyte component (K1) is removed from a first storage container (6) and a second electrolyte component (K2) is removed from a second storage container (8) and mixed in a mixing device (12), and wherein a mixture (G) of the first electrolyte component (K1) and the second electrolyte component (K2) is filled into the lithium ion battery cell (4), wherein the mixing device (12) and the lithium ion battery cell (4) are fluidically coupled to one another. The invention further relates to a device for producing a lithium ion battery cell (4).

Description

Method for producing lithium ion battery cell and device therefor
Technical Field
The invention relates to a method for producing a lithium-ion battery cell, in particular a traction battery for an electric motor vehicle. Here, the lithium ion battery cells are filled with an electrolyte. The invention further relates to a device for producing a lithium ion battery cell, in particular for filling it with an electrolyte.
Background
Electric motor vehicles typically have a traction battery (high voltage battery, HV battery) that provides energy to an electric motor to drive the motor vehicle. Such traction batteries, which are designed as lithium ion batteries, have at least one, in particular a plurality of lithium ion battery cells, which are electrically connected to one another in series and/or in parallel.
Each lithium ion battery cell comprises a plurality of anodes and cathodes, wherein a separator is arranged between each anode and cathode. The electrodes, i.e. the anode and the cathode, here usually each have a current conductor, in particular a film-shaped current conductor, onto which the active material is applied. Furthermore, a lithium ion battery cell, which is also referred to below simply as battery cell, has an electrolyte with a conductive salt, for example LiPF6(lithium hexafluorophosphate) and having a solvent for the conducting salt. As solvents, organic carbonates, in particular Ethylene Carbonate (EC), diethyl carbonate (DEC) or dimethyl carbonate (DMC), are generally used here. For example, the electrolyte additionally has additives.
When the electrolyte is transported to the production site of the lithium ion battery cell, there is a risk here that the electrolyte, in particular one of its (electrolyte) components, decomposes or reacts. In principle, such a process may take place already immediately after the preparation of the electrolyte. However, such reactions or such decomposition can be accelerated in an undesired manner, due to temperature fluctuations and/or due to exposure to UV radiation (ultraviolet radiation), in particular during transport.
Disclosure of Invention
The object of the present invention is to provide a particularly suitable method for producing a lithium ion battery cell, in particular for filling it with an electrolyte. In particular, it is intended to avoid decomposition or reaction of one of the electrolyte components and/or to achieve cost-effective production of the lithium ion battery cell. Furthermore, it is intended to provide an apparatus for manufacturing lithium ion battery cells.
With regard to the method, according to the invention, the object is achieved by the features of claim 1. With regard to the device, the object is achieved according to the invention with the features of claim 5. Advantageous embodiments and further developments are the subject matter of the dependent claims. The statements made in relation to the method apply here also to the apparatus and vice versa.
The method is used for manufacturing a lithium ion battery cell. In particular, the method is used for filling a lithium ion battery cell with an electrolyte when manufacturing the lithium ion battery cell. In this case, the lithium-ion battery cell is preferably provided and provided for a traction battery of an electric motor vehicle. Instead of this, the lithium-ion battery cell is provided and provided for a battery of an aircraft, a bicycle, a mobile phone, a laptop computer or the like.
In this method, the first electrolyte component is first taken out of a first storage container and the second electrolyte component is taken out of a second storage container. The two electrolyte components are then mixed in a mixing device. In this way, the first and second electrolyte components are brought together in a mixing device. In particular, the thus produced mixture of the first and second electrolyte components forms a complete electrolyte for filling the lithium ion battery cells.
This step can also be carried out in a similar manner for a plurality of electrolyte components. Each electrolyte component is therefore taken from the respective storage vessel and mixed in a mixing device.
Subsequently, according to the method, a mixture of the first electrolyte component and the second electrolyte component is filled from the mixing device into the lithium ion battery cell, in particular is conducted into the lithium ion battery cell. In other words, the lithium ion battery cell is filled with the mixture.
In this case, the mixing device and the lithium ion battery cell are fluidically coupled to one another, i.e., fluidically connected to one another. In this case, the mixing device is preferably also fluidically coupled to the lithium ion battery cell during the mixing process, i.e. during the mixing process of the first and second electrolyte components. Alternatively, a mixture, in particular for a plurality of lithium ion battery cells, may first be produced and then subsequently be fluidically connected to the or each lithium ion battery cell.
In summary, the electrolyte components separated from one another are mixed in a mixing device, wherein the mixing device is already in fluid connection with the lithium ion battery cell at least during the filling process, preferably also already during the mixing of the electrolyte components. The mixing device for filling is therefore preferably already in fluid connection with the lithium ion battery cell, also during the mixing of the electrolyte components.
Thus, the filling of the lithium ion battery cell is spatially in the vicinity of the mixing of the first and second electrolyte components. The fact that the electrolyte components which are still present separately before their mixing do not mix with one another until spatially near the filling site of the lithium ion battery cell advantageously enables the electrolyte components to be supplied separately from one another to the filling site of the lithium ion battery cell. This applies in a similar manner if a plurality of lithium ion battery cells are filled from the mixing device, for example even simultaneously. Compared to the delivery of the (completely prepared) electrolyte, i.e. compared to the delivery of the mixture, undesired reactions of one of the electrolyte components with the other electrolyte component are avoided.
It is particularly preferred to carry out the filling also immediately after the mixing in terms of time. Relatively long transport times are thus avoided and the risk of temperature fluctuations, exposure to UV radiation etc. is therefore reduced therewith. Consequently, the reacted electrolyte components are only later brought together, which in turn leads to shorter reaction times. Thus advantageously less decomposition products are formed. Thus, lithium ion battery cells having electrolytes that are mixed only momentarily prior to filling in time have improved performance and/or service life.
For example, consider a conductive salt, in particular lithium tetrafluoroborate (LiBF)4) Lithium hexafluoroarsenate (LiAsF)6) Or hexafluoroLithium phosphate (LiPF)6) As first electrolyte component, solvents are considered, which are suitably organic carbonates, in particular ethylene carbonate, diethyl carbonate, dimethyl carbonate or mixtures thereof, as second electrolyte component. However, according to one suitable embodiment, the first electrolyte component or the second electrolyte component is an (electrolyte) additive. Suitably, the respective further electrolyte component is a conducting salt dissolved in a solvent. Examples of additives which are temperature-labile are 1,3, 2-dioxathiolane-2, 2-dioxide (DTD) or tris (trimethylsilyl) phosphite (TMSPi). If these additives are not stored in the appropriate temperature range, they may react or decompose.
Instead of this, for example, additives are considered which react with the respective further electrolyte components, for example-as long as they are mixed-temperature-dependent reactions. In particular, according to this alternative, an additive that decomposes or reacts relatively quickly in a mixed state with the conductive salt and/or with the solvent for the conductive salt is used as one of the electrolyte components.
Generally, such temperature-unstable additives or electrolytes with such additives should be cooled.
In a cost-effective manner, with this method and the thus separated electrolyte components before mixing, it is possible to transport the temperature-stable and temperature-unstable electrolyte components or the electrolyte components reacted in a mixed manner with one another separately from one another to the filling site and/or to store the lithium ion battery cells. Thus, if one of the two electrolyte components decomposes or reacts, at least the other electrolyte component is not damaged. Temperature-stable and temperature-unstable electrolyte components can also be obtained in a cost-effective manner from different manufacturing sites, wherein in particular temperature-unstable electrolyte components are rather locally available.
After filling the lithium ion battery cell, the lithium ion battery cell is sealed and subjected to a so-called formation (Formierung). Upon formation of the lithium ion battery cell, i.e. during the first charging step of the lithium ion battery cell or during the first charge-discharge cycle, the additive, in particular the temperature-labile additive, reacts (almost) completely with the other constituents of the lithium ion battery cell in a (desired) predetermined reaction, for example to form a so-called solid-electrolyte-interface (SEI). Due to the predetermined reaction, the additive is no longer present in its original form, i.e. the form prior to the predetermined reaction. Further cooling of the lithium ion battery cell to avoid decomposition or reaction of the temperature-labile additives in the mixture is therefore no longer necessary.
According to a suitable embodiment of the method, the first electrolyte component and the second electrolyte component of the mixing process are liquids. If the first or second electrolyte components are not liquid, they are preferably first dissolved in a solvent and subsequently added to the mixing device. Particularly preferably, the dissolving and/or introduction into the mixing device takes place automatically. For example, the dissolution is carried out during the introduction.
According to a suitable embodiment of the method, a flow of the first electrolyte component from the first storage container to the lithium ion battery cell is generated, wherein the second electrolyte component is added or supplied to the flow. Thus, the flow from the storage container to the lithium ion battery cell is continuous, in particular it is not interrupted or stopped by the addition of the second electrolyte component. Thus, filling takes place immediately after mixing in time. In particular, the mixture is therefore not temporarily stored.
Another aspect of the invention relates to an apparatus for manufacturing a lithium ion battery cell. In particular, the device is provided and set up for this purpose for filling lithium ion battery cells with an electrolyte. The method is carried out in a suitable manner with the aid of the device in one of the variants described above.
The apparatus comprises a mixing device provided and arranged for mixing the first electrolyte component and the second electrolyte component. The mixing device is in this case fluidically coupled to both the first feed line and the second feed line, i.e. is connected to them. A first feed and a second feed, with for example one pipe or hose each, are used to supply the first electrolyte component or the second electrolyte component to the mixing device. In particular, a first storage container for the first electrolyte component is fluidically connected to the mixing device by means of a first feed line and/or a second storage container for the second electrolyte component is fluidically connected to the mixing device by means of a second feed line.
For example, the mixing device is designed as a mixing valve, designed as an injection pump like a liquid injection mixer. Alternatively, the first and second electrolyte components are guided into a common conduit or a common hose and mixed there, so that the conduit or the hose forms the mixing device.
A tapping pipe for a mixture of the first electrolyte component and the second electrolyte component is fluidly coupled to the mixing device. The tapping pipe has a filling device for filling the lithium ion battery cells at the end in the flow direction. The filling device is expediently designed here like a hollow cylindrical injection needle, preferably made of metal, wherein it is introduced into a corresponding injection opening of its housing for filling the lithium ion battery cell. Such filling devices are also referred to as spouts.
In summary, the mixing device is fluidly coupled at the inlet side with the first feed pipe and the second feed pipe. On the outlet side, the mixing device is fluidically coupled to the tapping pipe.
Thus, the feed pipe is fluidly connected to the discharge pipe. Thus, mixing takes place in the mixing device and filling takes place out of the mixing device. Thus, mixing and filling are jointly carried out by means of the apparatus.
Suitably, the apparatus further comprises a first storage vessel containing the first electrolyte composition and/or a second storage vessel containing the second electrolyte composition.
According to an advantageous embodiment, the mixing device, the first storage container and/or the second storage container for the second electrolyte component are temperature-adjustable. In other words, the mixing device, the first storage container and/or the second storage container may be cooled and/or heated. The respective electrolyte components or the mixture of electrolyte components can thus be tempered. In still other words, the temperature of the first electrolyte component, the second electrolyte component and/or mixtures thereof may be adjusted. Thus, the reaction or decomposition of one of the electrolyte components is advantageously prevented or at least reduced.
According to an advantageous embodiment, the mixing device, the first storage container and/or the second storage container have protection against UV radiation. Alternatively, the mixing device, the first storage container and/or the second storage container are designed such that they form a protection against UV radiation for the respective electrolyte component or for the mixture. For example, the wall of the mixing device, the first storage container and/or the second storage container is formed by a material that is impermeable to UV radiation, for example aluminum or steel. Alternatively, the mixing device, the first storage container and/or the second storage container are provided with a material that is impermeable to UV radiation, in particular coated with such a material. It is particularly preferred that the mixing device, in particular the walls and/or the coating thereof, is corrosion resistant.
According to an advantageous embodiment, the device has adjusting means, preferably one adjusting means for the first feed pipe and one adjusting means for the second feed pipe each. In this case, individual regulating measures are provided and set for this purpose, so that the amount and/or the feed rate, i.e. the amount per unit time, of the first electrolyte component and/or the second electrolyte component for mixing can be regulated. The adjustment is preferably carried out automatically. For example, the amount and/or the feed rate are adjusted by means of regulating measures. For this purpose, in particular the concentration or the ratio of the individual electrolyte components in the mixture is measured, the measured concentration or the measured ratio is compared with a predetermined target value, and the amount or the feed rate is adjusted again accordingly. To this end, the device suitably comprises a sensor. For example, it is arranged in a tapping pipe.
For example, the regulating means are designed as valves or regulating pistons, wherein the regulating means are fluidically connected between the respective storage container and the mixing device.
According to a suitable embodiment, a collecting container for the mixture is arranged between the mixing device and the tapping pipe in the flow direction oriented from the mixing device to the filling device. In this way, a mixture reserve can be generated and/or stored, in particular for the filling of further lithium ion battery cells, in particular spatially in the vicinity of the filling site of the lithium ion battery cells.
For example, the collecting container serves here only as a buffer container. In particular, the mixture is manufactured in relatively small amounts and/or is only provided for storage for a relatively short time, in particular less than one day. For this purpose, the collecting container expediently comprises a volume of less than 1500L, in particular less than 1000L, preferably less than 250L, depending on the embodiment of the battery cells and the number of battery cells which are to be filled by means of the apparatus over a period of time. Such a relatively small collecting container is advantageous and the mixture contained therein can be tempered relatively easily and relatively uniformly.
The collecting container is preferably likewise temperature-adjustable and forms a protection or has a protection of the mixture against UV radiation.
Instead, the apparatus has no collection vessel. In this case, the mixture is filled into the lithium ion battery cell immediately after its manufacture, i.e. immediately after the mixing of the first and second electrolyte components, in time.
Brief description of the drawings
Exemplary embodiments of the invention are explained in more detail below with the aid of the figures. Wherein:
fig. 1a schematically shows an apparatus for producing a lithium ion battery cell, wherein the apparatus has a mixing device in which a first electrolyte component and a second electrolyte component can be supplied for mixing, and wherein the mixing device can be fluidically coupled to the lithium ion battery cell by means of a discharge opening with a nozzle tube on the end side as a filling device,
fig. 1b schematically shows an alternative embodiment of the apparatus, wherein its mixing device has a collecting container for the mixture,
FIG. 2 schematically shows a first variant of a mixing device, in which it is designed like a mixing valve and has a regulating means designed as a regulating piston for regulating the amount and/or feed rate of the first electrolyte component or the second electrolyte for the mixing process,
FIG. 3 schematically shows a second variant of the mixing device, in which it is designed as a hose into which the first electrolyte component and the second electrolyte component are introduced, and
fig. 4 schematically shows a third variant of the mixing device, in which it is designed as a liquid mixing jet.
Parts and dimensions corresponding to each other are always provided with the same reference numerals in all figures.
Detailed Description
Fig. 1a schematically shows an apparatus 2 for producing a lithium-ion battery cell 4, in particular for filling the lithium-ion battery cell 4 with an electrolyte for the production thereof.
In this case, the first electrolyte component K1 is accommodated in the first storage container 6 and the second electrolyte component K2 is accommodated in the second storage container 8. For example, a conductive salt dissolved in a solvent is considered as the first electrolyte component K1 and in particular a temperature-unstable (electrolyte) additive or an additive dissolved in a solvent is considered as the second electrolyte component K2.
The first storage container 6 is in this case fluidically connected to a mixing device 12 by means of a first feed line 10. Similarly, the second storage container 8 is in fluid connection with the mixing device 12 by means of a second feed line 14. In summary, the first and second feed lines 10, 14 serve to supply the first and second electrolyte components K1, K2 into the mixing device 12.
During operation of the device 2, and therefore during production of the lithium ion battery cell 4, the first electrolyte component K1 is removed from the first storage container 6, and the second electrolyte component K2 is removed from the second storage container 8 and mixed in the stirring device 12. The mixture G of the first electrolyte component K1 and the second electrolyte component K2 here forms the electrolyte for the lithium ion battery cell 4. For example, the first storage container 6 is designed as a tank for the conductive salt as the first electrolyte component K1 dissolved in the solvent and the second storage container 8 is designed as a bottle for the additive as the second electrolyte component K2, in particular dissolved in a further solvent.
Furthermore, the mixing device 12 is in fluid connection with the tapping pipe 16. In summary, the mixing device 12 is fluidically coupled on the inlet side to a first feed line 10 and a second feed line 14 and to an outlet line 16.
The tapping pipe 16 has a filling device 18 at the end for the fluid coupling of the tapping pipe 16 to the lithium ion battery cell 4. The mixing device 12 can therefore be fluidically connected to the lithium-ion battery cell 4 by means of the filling device 18. For this purpose, the filling device 18 is designed as a hollow cylindrical metal needle. In order to fill the lithium-ion battery cell 4 with electrolyte, i.e. with the mixture G, the filling device 18 is accommodated in a corresponding injection opening 20 of the housing 22. The mixing device 12 and the lithium ion battery cell 4 are therefore fluidically coupled to one another by means of the filling device 18.
Overall, the electrolyte components K1 and K2 separated from one another are mixed in the mixing device 12 and the mixture G is filled into the lithium ion battery cell 4. In this case, the mixing device 12 is already in fluid connection with the lithium ion battery cell 4 at least during the filling process, preferably also during the mixing of the electrolyte components K1, K2.
For example, one of the two electrolyte components, K1 or K2, is a solid. This solid electrolyte component K1 or K2 is mixed into the liquid flow of the respective further electrolyte component K2 or K1 of the respective storage container of the lithium ion battery cell 4. In this case, the solid electrolyte component K1 or K2 is conveyed, for example, by means of a gas flow. Instead of this, a storage container for solid electrolyte component K1 or K2 is arranged above second feed pipe 14, so that solid electrolyte component K1 or K2 is conveyed into the mixing device due to gravity. Additionally or alternatively, a conveying mechanism (not further shown) such as a conveyor belt or a conveying shovel may be considered for conveying the solid electrolyte component K1 or K2.
Alternatively and preferably, for a relatively simple mixing process, it is preferred that both the first electrolyte component K1 and the second electrolyte component K2 are liquid. Optionally, for this purpose, the solid constituents of one of the electrolyte components are dissolved in a solvent and the dissolved constituents are taken into account as liquid electrolyte components.
For mixing, the liquid flows of the first electrolyte component K1 and the second electrolyte component K2 are supplied jointly from the first storage container 6 and from the second storage container 8 into the lithium-ion battery cell 4 by means of the mixing device 12. In other words, the liquid flow of the second electrolyte component K2 is added to the liquid flow of the first electrolyte component K1, or vice versa. The liquid flow is preferably not interrupted during filling, so mixing and filling are preferably carried out continuously.
In general, mixing can be performed immediately prior to filling. In other words, the mixing may occur spatially and/or temporally close to each other.
In summary, the first storage container 6 and the second storage container 8 are fluidically coupled to the lithium-ion battery cell 4 by means of the mixing device 12.
The apparatus 2 comprises one regulating means 24 for each of the first feed pipe 10 and the second feed pipe 14. The respective regulating measures 24 are provided for regulating the amount and/or feed rate of the first electrolyte component and/or the second electrolyte component for mixing. One of the regulating measures 24 is arranged between the mixing device 12 and the first storage container 6, and the other regulating measure 24 is arranged in the flow direction between the mixing device 12 and the second storage container 8.
According to an alternative, which is not shown in fig. 1a or 1b, a common adjusting means 24 is provided for the first feed pipe 10 and the second feed pipe 14. The regulating means 24 is here expediently arranged in the mixing device 12, see for example the embodiment of the mixing device according to fig. 2.
In an alternative embodiment of the device 2 according to fig. 1b, a collecting container 26 for the mixture G is additionally arranged in the flow direction from the mixing device 12 to the filling device 18. Here, it comprises a volume of less than 1500L, in particular less than 1000L, preferably less than 250L. Advantageously, such a relatively small collecting container 26 and the mixture G contained therein can be tempered relatively easily and relatively uniformly.
The mixing device 12, the collecting container 26, the first storage container 6 and/or the second storage container 8 are temperature-adjustable, i.e. can be cooled and/or can be heated, so that the temperature of the respective electrolyte component K1, K2 and/or the temperature of the mixture G is adjustable. For this purpose, the mixing device 12, the collecting container 26, the first storage container 6 and/or the second storage container 8 are each equipped with a temperature control device 28.
Furthermore, the mixing device 12, the collecting container 26, the first storage container 6 and/or the second storage container 8 are designed such that they form a protection of the respective electrolyte component or mixture G against UV radiation. For this purpose, in particular their walls or housings are designed to be impermeable to UV radiation. According to an alternative, which is not further shown, the mixing device 12, the collecting container 26, the first storage container 6 and/or the second storage container 8 are provided with a coating for protecting the first electrolyte component K1, the second electrolyte component K2 or the mixture G from UV radiation.
The device 2 furthermore has a sensor 36. Which is arranged in the tapping pipe 16 in fig. 1a to 4 as an example. Alternatively, it is arranged in the collecting container 26. The sensor 36 is used here to determine the concentration or the ratio of the first electrolyte component K1 and/or the second electrolyte component K2 in the mixture G. In a manner not shown further, the measured concentration or the measured ratio is compared with a predetermined target value and the amount or feed rate 24 of the first electrolyte component K1 and/or the second electrolyte component K2 is adjusted again accordingly by means of the respective adjusting measure 24. In other words, a control loop is formed by means of the sensor 36 and the one or more control measures 24.
Fig. 2 to 4 schematically show a variant of the mixing device 12.
According to a first variant of fig. 2, the mixing device 12 is designed like a mixing valve. The adjusting means 24 arranged in the mixing device 12 are designed here as adjusting pistons. Which is arranged between the two inlet openings 30 of the first 10 and second 14 feed pipes. By means of the method of adjusting the piston, which is illustrated in fig. 2 by means of a corresponding double arrow, the inlet openings 30 can be closed or the gap between the respective inlet opening and the adjusting piston can be enlarged or reduced. In this way, the feed rate of the first electrolyte component K1 and/or the second electrolyte component K2 for mixing can be adjusted. The mixture G is discharged via the tapping pipe 16 to the lithium ion battery cell 4 or, in a manner not shown in detail, to a collecting container 26.
According to a second variant of fig. 3, the mixing device 12 is designed as a hose. The first feed tube 10 is connected on the inlet side to the hose by a first adjustment measure 24, while the second feed tube 14 is connected to the hose by a further adjustment measure 24. The two regulating means 24 are each designed as a valve in fig. 2 by way of example. The two electrolyte components K1 and K2 are supplied to the hose by means of respective feed lines 10, 14, wherein the two electrolyte components K1 and K2 are mixed there. The mixture G is discharged via the tapping pipe 16 to the lithium ion battery cell 4 or, in a manner not shown in detail, to a collecting container 26.
According to an alternative, not further shown, of the mixing device 12 according to fig. 3, a pipe is used instead of a hose. Here, the other explanations for fig. 3 are applied in a similar manner.
According to a third variant of fig. 4, the mixing device 12 is designed as an ejector pump like a liquid mixing ejector. In this case, the first electrolyte component K1 is guided as a so-called propellant jet through the nozzle 32 from the first feed line 10 into the mixing chamber 34. The second electrolyte component K2 is guided into the mixing chamber 34 by means of the second feed line 14. There, second electrolyte component K2 is entrained with the propellant jet and is sucked into the propellant jet as a result of the negative pressure in the propellant jet. Thus, the first and second electrolyte components K1, K2 are mixed with each other. The mixture G is discharged via a discharge pipe 16 designed as a diffuser to the lithium ion battery cells 4 or, in a manner not shown in detail, to a collecting container 26.
If the second electrolyte component K2 is solid, it is conducted into the mixing chamber 34 by means of an air flow. For example, the second electrolyte component K2 is atomized or atomized.
In fig. 4, the adjusting means 24 are not shown in detail here. This is achieved in particular by means of at least one pump for delivering the first and/or second electrolyte component K1, K2, wherein the pump or pumps are capable of regulating the respective delivery rate of the first and/or second electrolyte component K1, K2.
The present invention is not limited to the above-described exemplary embodiments. Rather, other variants of the invention can also be derived therefrom by the person skilled in the art without departing from the subject matter of the invention. In particular, furthermore, all individual features described in connection with the exemplary embodiments may also be combined with one another in other ways without departing from the subject matter of the invention.
List of reference numerals
2 apparatus
4 lithium ion battery core
6 first storage Container
8 second storage container
10 first feeding pipe
12 mixing device
14 second feeding pipe
16 discharge pipe
18 filling device
20 injection opening
22 casing of lithium ion battery cell
24 adjustment measure
26 collecting container
28 temperature regulating device
30 entry opening
32 nozzle
34 mixing chamber
36 sensor
G mixtures
K1 first electrolyte composition
K2 second electrolyte component.

Claims (10)

1. Method for producing a lithium-ion battery cell (4), in particular a traction battery for an electric motor vehicle,
-wherein the first electrolyte component (K1) is taken from a first storage vessel (6) and the second electrolyte component (K2) is taken from a second storage vessel (8) and mixed in a mixing device (12), and
-wherein a mixture (G) of the first electrolyte component (K1) and the second electrolyte component (K2) is filled into a lithium ion battery cell (4),
-wherein the mixing device (12) and the lithium ion battery cell (4) are fluidly coupled to each other.
2. A method according to claim 1
It is characterized in that the preparation method is characterized in that,
the first electrolyte component (K1) or the second electrolyte component (K2) is an additive, in particular a temperature-unstable additive or an additive which undergoes a decomposition reaction, in particular a temperature-dependent decomposition reaction, with the respective other electrolyte component (K2, K1), or is an additive dissolved in a solvent.
3. The method according to claim 1 or 2,
it is characterized in that the preparation method is characterized in that,
the first electrolyte component (K1) and the second electrolyte component (K2) are liquids.
4. The method of any one of claims 1 to 3,
it is characterized in that the preparation method is characterized in that,
a flow of the first electrolyte component (K1) from the first storage container (6) to the lithium ion battery cell (4) is generated, wherein the second electrolyte component (K2) is added to the flow.
5. Apparatus (2) for producing a lithium ion battery cell (4), in particular for filling a lithium ion battery cell (4) with an electrolyte, the apparatus (2) having
-a mixing device (12) for mixing the first electrolyte component (K1) and the second electrolyte component (K2),
-a first feed pipe (10) connected to the mixing device for supplying a first electrolyte component (K1),
-a second feed pipe (14) connected to the mixing device for supplying a second electrolyte component (K2), and
a tapping (16) coupled to the mixing device (12) for a mixture (G) of the first electrolyte component (K1) and the second electrolyte component (K2), wherein the tapping (16) has a filling device (18) at the end side for filling the lithium ion battery cells (4).
6. The device (2) according to claim 5,
characterized by adjusting means (24) by means of which the amount and/or the feed rate of the first electrolyte component (K1) and/or the second electrolyte component (K2) for mixing can be adjusted.
7. Device (2) according to claim 5 or 6,
it is characterized in that the preparation method is characterized in that,
a collecting container (26) for the mixture (G) is arranged between the mixing device (12) and the discharge pipe (16) in the flow direction from the mixing device (12) to the filling device (18).
8. The device (2) according to claim 7,
it is characterized in that the preparation method is characterized in that,
the volume of the collecting container (26) is less than 1500L, in particular less than 1000L, preferably less than 250L.
9. The device (2) according to any one of claims 5 to 8,
it is characterized in that the preparation method is characterized in that,
the mixing device (12), the collecting container (26), the first storage container (6) for the first electrolyte component (K1) and/or the second storage container (8) for the second electrolyte component (K2) are temperature-controllable.
10. Device (2) according to claim 9,
characterized by a sensor (36) for determining the concentration of the first electrolyte component (K1) and/or the second electrolyte component (K2) in the mixture (G).
CN202111440507.5A 2020-12-02 2021-11-30 Method for producing lithium ion battery cell and device therefor Pending CN114583416A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102044722A (en) * 2009-10-14 2011-05-04 通用汽车环球科技运作公司 Liquid rechargeable lithium ion battery
WO2014079183A1 (en) * 2012-11-26 2014-05-30 华为技术有限公司 Nonaqueous organic electrolyte additive and preparation method thereof, nonaqueous organic electrolyte, and lithium ion secondary battery
CN209005621U (en) * 2018-09-27 2019-06-21 杉杉新材料（衢州）有限公司 A kind of lithium-ion battery electrolytes mixing arrangement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010052397A1 (en) 2010-11-24 2012-05-24 Li-Tec Battery Gmbh Method and device for filling an electrochemical cell
DE102011088682A1 (en) 2011-12-15 2013-06-20 Robert Bosch Gmbh Electrolyte fluid metering device for lithium cells

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102044722A (en) * 2009-10-14 2011-05-04 通用汽车环球科技运作公司 Liquid rechargeable lithium ion battery
WO2014079183A1 (en) * 2012-11-26 2014-05-30 华为技术有限公司 Nonaqueous organic electrolyte additive and preparation method thereof, nonaqueous organic electrolyte, and lithium ion secondary battery
CN209005621U (en) * 2018-09-27 2019-06-21 杉杉新材料（衢州）有限公司 A kind of lithium-ion battery electrolytes mixing arrangement

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