WO2014079725A1 - Apparatur und verfahren zur herstellung von elektrochemischen zellen - Google Patents
Apparatur und verfahren zur herstellung von elektrochemischen zellen Download PDFInfo
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- WO2014079725A1 WO2014079725A1 PCT/EP2013/073540 EP2013073540W WO2014079725A1 WO 2014079725 A1 WO2014079725 A1 WO 2014079725A1 EP 2013073540 W EP2013073540 W EP 2013073540W WO 2014079725 A1 WO2014079725 A1 WO 2014079725A1
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- Prior art keywords
- components
- storage
- cells
- production
- tray
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/049—Processes for forming or storing electrodes in the battery container
-
- 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
- H01M10/058—Construction or manufacture
-
- 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
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- 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
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- 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
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
- Y10T29/4911—Electric battery cell making including sealing
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/5313—Means to assemble electrical device
- Y10T29/53135—Storage cell or battery
Definitions
- the present invention relates to an apparatus and a method for producing electrochemical cells, preferably lithium ion cells.
- the apparatus comprises at least one storage place (13, 15, 17, 19), a mounting place (2, 4), a positioning system (3) with gripper (150), a pipetting machine (5) with cleaning station, a tool for closing cells stacked together by stacking and at least one tray with troughs for receiving components, wherein the number of troughs is a total of> two, preferably> four, more preferably> six.
- the apparatus can also be equipped with a balance (1) and / or camera (25).
- the assemblies of the apparatus are preferably surrounded by an enclosure (8), preferably a glovebox.
- the enclosure is in operative connection with at least one lock (23).
- the prior art discloses in CN 102290602, CN 201540925 and CN 201829565 a type of apparatus based on the use of a turntable.
- the different manufacturing stations for the production of the cells are arranged.
- the components are mounted in a circle around the center on the surface of the turntable and moved by the rotational movement to the individual points of the manufacturing station.
- an apparatus for assembling film housings is disclosed in CN 102013496.
- the housings are in this case transported on a conveyor belt along the longitudinal axis of the apparatus, wherein at different positions repeatedly the same process steps are carried out in repetition.
- the manufacturing equipment must be located in shelters since it is disclosed that the manufacturing equipment is used to produce Li cells. Due to the production of Li cells, it should be ensured that the production of the cells takes place with the exclusion of at least oxygen and atmospheric moisture. Apart from that, in the state of the art individual tools are known which can be used as modules in the production of battery cells. These are grippers that are used for handling components of cells.
- CN 102044663 discloses a method and apparatus for lamination of foil electrodes.
- Automated battery manufacturing processes are also described in the literature (see, for example, Li, Sha, Wang, Hui, Hu, S.Jack, Lin, Yhu-Tin, Abell, Jeffrey A., J. of Manufacturing Systems 30 (201 1), p 188-195).
- Automated battery manufacturing processes typically involve the fabrication of batteries from a plurality of similar cells, the identity particularly affecting electrodes and electrolyte.
- the plurality of cells are formed from stacks of individual pouch cells that are sensitive and therefore place high demands on handling.
- An objective in the development of electrochemical cells is to obtain electrochemical cells that have a long life and in which the stored energy can be retrieved within a very short time.
- the lithium-ion cells produced so far have energy storage densities with values which may be in the range from 70 to 150 Wh / kg.
- the theoretical limit of the energy density of Li cells is even higher. Therefore, it can be assumed that the energy density can be further increased.
- cycle stability and ampacity are also targets for optimization.
- lead / sulfuric acid accumulators have only an energy density whose values lie in a range of 30 to 40 Wh / kg.
- One of the objects on which the invention is based is to provide an apparatus and a method by which the production of electrochemical cells can be made very flexible.
- an apparatus for producing electrochemical cells which has at least one storage location (13, 15, 17, 19), a mounting location (2), a positioning system (3) with gripper ( 150), a pipetting machine (5) with cleaning station, a tool for closing cells assembled by stacking and at least one storage tray with troughs for receiving components, the number of troughs totaling> two, preferably> four, particularly preferably> is six.
- Apparatus for the production of electrochemical cells which has at least one storage location (13, 15, 17, 19), a mounting location (2), a positioning system (3) with gripper ( 150), a pipetting machine (5) with cleaning station, a tool for closing cells assembled by stacking and at least one storage tray with troughs for receiving components, the number of troughs totaling> two, preferably> four, particularly preferably> is six.
- the apparatus comprises a balance (1) and / or at least one camera (25), wherein the camera (25) is arranged in the region of the base plate of the apparatus.
- the lens of the first camera is directed vertically upwards.
- a lateral position determination of the device gripped by the gripper takes place. This position determination makes it possible to perform a position correction in the positioning of the component. The accuracy in depositing the device is increased.
- a surface analysis of the underside of the respective component in particular of the electrodes and / or the separators, can also be carried out by means of the camera.
- the characterization data of the surface analysis (preferably the electrodes or the separators) are detected by the program control and stored in the database.
- the image data from the camera are used by comparison with reference data as a basis for deciding to discard the currently seized part. This process is implemented in the program control or in the software of the program.
- the apparatus is equipped with a second camera (25 ') which is arranged in the upper part of the housing and whose lens is directed vertically in the direction of the base plate.
- the camera is preferably arranged in the area above the scale (1).
- the top of the respective component preferably the electrodes and / or the separators is analyzed.
- the data of the surface analysis are recorded by the program control and stored in the database.
- these image data are used by comparison with reference data as a basis for the decision for the separation of the currently inspected component.
- Process is carried out by means of program control or software.
- the apparatus comprises means for moving the tray to the at least one storage slot (13, 15, 17, 19) or the tray to the storage bays.
- the apparatus according to the invention is an apparatus for producing Li-ion cells and the individual components of the apparatus are surrounded by an enclosure (8), preferably a glovebox, and the enclosure is connected to at least one lock (23). , preferably two locks (23, 10), in operative connection.
- the glovebox (8) contains means for regulating and monitoring the atmosphere in its interior.
- the apparatus according to the invention comprises a base plate;
- the base plate has a size of 100 cm x 200 cm.
- the base plate and the components described below are included in a glovebox.
- the main function of the glovebox is to keep air and humidity out of the assembly area.
- the glove box has means for monitoring and controlling the gas atmosphere, whereby the gas atmosphere can be specified specifically.
- the gas supply may also be provided with means for gas purification.
- the storage space preferably has means for detecting the position of the storage trays.
- the apparatus comprises a guide, which are located in the storage area, the mounting area and / or the lock area.
- the storage trays can be moved, for example, in the storage area along the guide and fixed at selected locations with high spatial accuracy.
- the exact local positioning and fixing is particularly advantageous since it follows that grippers can remove components with high spatial accuracy.
- the guide can also serve as a holder for receiving the storage trays.
- the tray trays are stackable and a plurality of tray trays may be stacked within the tray.
- the spatial conditions are more favorable in order to move the tray trays in the stack from the stack to the respective storage positions, provided that a multiplicity of loaded tray trays are simultaneously introduced.
- the high positional accuracy in the fixation of the tray at certain storage positions in the storage area is important, since in this way a control of the wells and the inclusion of the components therein is supported by the gripper.
- the components used for the production of electrochemical cells can sometimes have very small dimensions and also very low weights.
- the almost trouble-free recording and handling of the individual components by means of the gripper are possible by means of the apparatus according to the invention.
- the troughed trays are an essential feature of the invention as they are interchangeable and allow for extremely flexible use in the apparatus of the present invention. It is also important that the information belonging to the respective filing tray is stored in the program control.
- the information is, for example, the number of wells m y , the size of the wells and their shape and location coordinates.
- the number of wells depends on the size of the cells to be produced. For example, the number of wells for the production of button cells is greater than the number of wells for the production of pouch cells.
- Program Tax information regarding the placement of individual hollows with components deposited.
- the storage slot has two or more positions for receiving storage trays.
- the respective positions provided are preferably always associated with tray, which have the same dimensions, since these can then be easily introduced, positioned and fixed on the feed rail.
- all storage trays have the same dimensions and can be attached to all positions of the storage slot or the storage slots (13, 15, 17, 19).
- the interchangeability of storage trays is important for the very flexible use of the apparatus. For example, a conversion of the apparatus from the use for the production of button cells on the use for the production of pouch cells - and vice versa - very easily possible. If the apparatus has both button closure means and pouch cell sealing means, these two types of cells can be made in a reciprocal sequence.
- the means for closing the cells may preferably be represented as individual processing stations.
- a storage area is arranged along one longitudinal edge.
- the processing stations include a balance (1), an electronic camera (25) with image recognition software, a tool for sealing the electrochemical cells - for example a press for the production of button cells -, a pipetting machine (5) for dispensing liquid electrolyte and a station for cleaning the tips of the automatic pipettor.
- a more complex station for producing film cells is arranged instead of the press. It is also possible that both means for closing button cells and a module for closing of foil cells are arranged.
- a positioning system (3) which can reach by means of a gripper (150) every point above the plate.
- the achieved positioning accuracy is preferably 0.4 mm, more preferably 0.2 mm and more preferably 0.1 mm. All these components are in electronic communication with a control computer, which coordinates the processing stations and the transport steps.
- a schematic overview is shown in FIG.
- the positioning system can be designed, for example, as a gantry system (3) or as an articulated-arm robot (3 '). Any other type of positioning can also be used.
- the size of the gripper is adapted to the objects to be placed, preferably it is a vacuum gripper, since preferably planar components are positioned.
- the vacuum gripper requires one or more flat attack surfaces. In particular, this is important when gripping rotationally symmetrical components.
- the vacuum gripper is coupled via a rotating system with the gantry system, so that the gripper (150) recorded components in the plane of the base plate both clockwise and counterclockwise Clockwise in each case by at least 10 °, preferably 22.5 °, more preferably by 45 ° could be rotated, the resolution during rotation> 0.4 °, preferably> 0.2 °, more preferably> 0.1 ° is.
- the storage area as a guide comprises a linear guide system which serves to receive storage trays for the components of the cells.
- the housing preferably glovebox (8), is in operative connection with at least one sluice (23).
- the storage trays are introduced through the lock (23) in the storage area of the housing and fixed in the storage area at defined storage positions. Further preferred is also an arrangement in which there is a respective lock (23, 10) at both ends of the guide of the storage area.
- the locks have a device for gas exchange and at least one lock (23) via a device for heating.
- the components are pretreated prior to their introduction into the enclosure in order to remove the components of the air, and in particular moisture, if possible.
- these devices comprise an apparatus for evacuating and flooding with inert gas.
- the negative pressure achievable in the lock (s) is preferably> 5 mbara, more preferably> 1 mbara and especially preferably 0.1 mbara and the heating temperature is in the range of 20 to 200 ° C, preferably 50 to 180 ° C, in particular preferably 80 ° C to 160 ° C.
- the pressures are given in bar absolute (bara).
- the apparatus has a device for guiding the storage trays, which comprises, for example, one or more guide rails and guide elements.
- the guide elements are attached to the tray trays. Sliding guide elements, rollers and ball bearings can be used as guide elements.
- the guide is preferably a linear guide.
- the tray trays provided with the guide elements are placed on the guide and can travel along the guide rail. be moved to exactly predetermined positions within the apparatus. The predetermined positions are the storage locations (13, 15, 17, 19).
- the storage trays may be provided with an electric drive, by which they are then moved to the positions of the storage locations (13, 15, 17, 19).
- the tray trays by manual intervention along the guide rail from the interior of the lock to the individual storage locations (13, 15, 17, 19), of one of Storage bins moved to the next storage bins or from the storage bins into the lock.
- the term storage place may refer to certain storage places (13, 15, 17, 19) or to a total of storage places. By the use of reference numerals, the term should not be limited.
- the delivery trays can also be present in stacked form on the storage bins, which is particularly preferred in connection with the use of the storage bins in the locks.
- the ends of the individual tray trays have couplings.
- several storage trays can be linked together, which then form a serial arrangement of trays.
- the serial arrangement of the stackable trays coupled together can be both pushed and pulled along the guide.
- the coupling elements are located laterally on the tray trays, as shown in Figures 5.a - 5.c.
- the coupling elements make it possible to push or pull the tray on the guide.
- the couplings are designed so that a preferred distance remains between the tray trays, which allows to manually detect the trays.
- the distance between the individual tray-connected trays is preferably in the range of 1 to 4 cm, preferably the distance is less than 3 cm.
- the couplings according to the figure 5.a are hook-shaped. Wherein the hooks are designed to be complementary, so that they can interlock with adjacent tray trays as shown in Figure 5.b.
- the hooks are made with an oversize, which results in a tensile or shear direction a game, which is preferably ⁇ 5 mm, more preferably ⁇ 4mm and more preferably ⁇ 3mm. Because there is a game, it is possible that To position and fix tray trays along the guide rail.
- the process of positioning and fixing is called indexing.
- the indexing is done for example via pneumatically moved metal pins that engage in, for example, holes in the tray trays. The indexing is advantageous for the economic operation of the apparatus.
- the tray trays are aligned with respect to the positioning system.
- the coupling elements to permanent magnets are linked together in such a way that meet at two adjacent tray trays each have a coupling element with a magnetic north pole and a coupling element with a magnetic south pole.
- the magnets are held in position by a handrail movable with respect to the coupling.
- On the support rod is also an elastic element - for example, a coil spring - which allows the tray trays in tensile thrust direction with a tolerance of 5 mm, preferably 4 mm, more preferably 2 mm game position, so that here too the indexing is possible
- Figure 6.a is a schematic representation of a magnetic see coupling element in the preferred embodiment shown. The game ensures indexability, i. the displacement in a spatially defined position and as a result, the attachment.
- the components of the cells are introduced into the troughs of the storage trays in the storage area.
- the tray trays are rectangular plates with a flat surface, wherein the length times width in the range between 10 x 10 cm and 50 x 50 cm and the height or thickness of the tray trays of preferably ⁇ 5 cm, more preferably ⁇ 2 cm and especially preferably ⁇ 1 cm.
- the troughs are recesses with the contour of the respective components, which are stored in a trough.
- the troughs are arranged in a matrix. An exemplary illustration is shown in FIG.
- the storage trays have channels or milled through which a
- the components of the cells have partly due to the small dimensions and low film thickness film-like character. This leads to the problem that the components adhere to each other and a targeted removal of individual parts is disturbed.
- separating elements are provided between the individual components. inserted elements (103), as shown in Figure 2. b, which prevent the adhesion of the components (102).
- These separating elements may consist, for example, of plastics, conductive plastics, of conductively coated plastics or of thin sheets.
- the separating elements are equipped in an embossing process with guide lugs (100) and centering points, so that between two superimposed separating elements, a flat space for receiving the film-like components (102) is formed.
- the embossed contours of the separating elements (103) also has the task of positioning the foil-like electrodes and separators with a tolerance of 5 mm, preferably 2 mm, preferably 1 mm, in the plane of the table.
- the separators can also be provided with flexible tongues which serve as hold-downs to prevent the rolling of single-sided coated films.
- the tray elements provided with components are first stacked in the lock (23) and subjected to a conditioning program. After conditioning, the tray trays are placed in the storage area and positioned and fixed there. For equipping the storage slots (13, 15, 17, 19) with the tray trays funds are available. However, this step can also be performed manually, for example, if handling holes with gloves (14, 16, 18, 20) are provided in the housing, preferably glovebox (8), which allows the operator to engage in the area of the housing.
- an automatic pipetting device (5) is located above the base plate, with which liquid components are applied to the electrodes of the cells or to the separator.
- the automatic pipetting machine picks up the electrolyte to be dispensed from a storage area and dispenses it in predetermined quantities in the cell to be assembled.
- the dosing accuracy is +/- 0.1 ⁇ _ with a dispensed quantity of 10 ⁇ _ per dosing point.
- the metering device either has its own device for positioning or is coupled to, for example, the portal system and is positioned by the latter at least in one axis.
- the apparatus is characterized in that it has a multiplicity of vessels with electrolytes up to I_N, where N> 2.
- N the number of electrolyte vessels N> 10 (- o) and further preferably the number of electrolyte vessels N> 20. Conceivable and possible is also a number of electrolyte vessels N> 100.
- the reservoir for the electrolyte comprises vessels with a pierceable membrane seal that can be penetrated by the needle of the automatic pipetting machine.
- the size of the usable vessels is variable and depends on the respective work program. If the influence of the composition of the electrolytes on the performance characteristics of the electrochemical cells to be examined, it is expedient to a larger number Use electrolyte vessels with a low capacity. For example, in the form of a matrix-shaped arrangement with 10 x 10 vessels, each having a capacity of 2 - 5 ml of electrolyte solution. If, on the other hand, the influence of the electrodes on the performance characteristics of the electrochemical cells is to be investigated, it is expedient to use only a few or even a single electrolyte.
- electrolyte vessels are used, which have a larger capacity.
- an arrangement of 3 ⁇ 3 vessels whose respective capacity is 20-50 ml is suitable.
- the apparatus according to the invention is characterized in that it is used extremely flexibly for research purposes in the laboratory sector. With regard to the dimensioning and capacity, the apparatus according to the invention is therefore also subject to certain limits concerning the throughput and the design. The high flexibility is also due to the modular design of the apparatus. In addition, the apparatus can also be used for long-term operation, through which the efficiency of the use of the apparatus can be increased.
- Another object is to provide an apparatus and method for the production of electrochemical cells, which is operated over a long period of time with little effort.
- An essential aspect of the apparatus according to the invention is that a certain amount of cells is produced and at the same time the parameters of the individual cell are varied in a defined manner. Due to the use of tray trays, manufacturing does not relate to a continuous manufacturing process of a large number of identical cells but to the production of a plurality of different cells. The production is therefore also subject to limitations, as far as the upper limit of the number of pieces is concerned.
- a pipetting machine is used in the apparatus which uses a liquid to avoid its own contamination and to operate.
- This fluid is referred to below as the system fluid.
- the system liquid preferably consists of one of the components of the electrolyte, more preferably of the component which is liquid under normal conditions and completely volatile.
- the system liquid is required in proportion to the metered amount in at least tenfold excess, the liquid must be disposed of after use from the glovebox. Typical amounts of system fluid are on the order of 1 to 5 liters per day.
- the apparatus according to the invention has at least one container for system liquids and at least one container for liquid waste.
- the absorption capacity of the liquid container for the system liquid is preferably 2 to 20 liters, more preferably 5 to 15 liters.
- the absorption capacity of the container for the liquid waste exceeds the capacity of the receptacle for the system liquids at least by 1 liter, preferably at least by 2 liters.
- the containers are designed so that they can also be flooded with inert gas to ensure contamination of the atmosphere in the interior of the housing space, preferably the glovebox.
- the apparatus according to the invention has at least one container for a system fluid for operating the automatic pipetting apparatus and at least one container for liquid waste.
- the receiving capacity of the liquid container for the cleaning liquid is preferably 2 to 20 liters, more preferably 5 to 15 liters.
- the absorption capacity of the container for the liquid waste exceeds the capacity of the receiving container for the cleaning liquids at least by 1 liter, preferably at least by 2 liters.
- the containers are designed so that they can also be flooded with inert gas to ensure contamination of the atmosphere in the interior of the housing space, preferably the glovebox.
- the equipment of the apparatus according to the invention with the containers for the system liquid and the liquid waste is chosen so that the apparatus can be operated with little maintenance and without long interruption times.
- the interruption times are given when, for example, the storage containers for the electrolyte liquids are exchanged. In part, it also comes to interrupting the operation of the apparatus when introducing or removing the storage trays.
- the dosage of the electrolyte is carried out by means of a handling system for liquids, preferably by means of automatic pipetting.
- the automatic pipetting machine requires a system fluid for cleaning and operation.
- the major part of the system liquid advantageously consists of the main component of the electrolyte liquid.
- the system fluid is forced through the lines of the automatic pipettor so that possible additives that might have been deposited in the lines of the automatic pipetting device are loosened and washed away.
- the apparatus which is equipped with the system liquid and liquid waste containers, preferably also has a device which provides pressure equalization between the system liquid containers, the liquid waste container and the glovebox.
- a preferred embodiment of the apparatus which is equipped with two containers - ie a container for system liquid and a container for the liquid waste - is shown schematically in Figure 6.b.
- the gas supply (250) via a line (251), a shut-off (252) and the line (253) with the headspace of the container (254) in operative connection.
- the conduit (256) terminates in the vessel, with the conduit end terminating at a distance of about 0.5 to 5 cm above the vessel bottom.
- the conduit constitutes a riser. The removal of the cleaning fluid from the container is accomplished by the conduit immersed therein.
- a line (257) is in operative connection with the shut-off devices (260) and (259).
- the other end of the obturator (260) is in operative connection with the interior of the glovebox.
- the line, at the end of which the obturator (259) is located, serves for the discharge of inert gas.
- a coupling (257) is located in the supply and discharge lines of the container, through which the container can be disconnected from the glovebox and which also ensures that the glovebox remains closed despite the decoupling.
- the container for the liquid waste is connected in an analogous manner as the container for the cleaning liquid.
- an inlet tube takes the place of the riser.
- the inlet tube protrudes, in contrast to the riser, only 1 - 5 cm far into the upper part of the container.
- positions (250), (251), (259) can be omitted.
- the discharge (258) is then directly above the headspace of the container with the obturator (252) in operative connection.
- shut-off elements (260) and (261) can advantageously be integrated into the respective clutches (257). This is done by using self-locking quick-release couplings.
- Figure 6.b In the basic state, the container is uncoupled and the shut-off valves (260) are closed.
- the container is connected to the glovebox via the couplings (257). After opening the obturator (259) in the direction of the exhaust gas and gas supply direction (252), a gas flow from the gas supply through the headspace of the container is set into the exhaust air in motion.
- the volume of the headspace of the container should be exchanged at least five times, more preferably ten times, and even more preferably twenty times.
- the shut-off devices (252) and (259) are closed. In order to avoid pressure build-up in the container, first the shut-off device (252) and with a time delay the shut-off device (259) are closed. The time delay is at least ten seconds. Thereafter, the shut-off devices (260) are opened.
- the line (253) is first connected with the shut-off device open. Due to the overpressure in the interior of the glove box, the inert gas begins to flow immediately through the container. When the volume of the head space of the container is preferably exchanged with the inert gas five times, more preferably at least ten times, and particularly preferably twenty times, the atmospheric contaminants are sufficiently removed.
- the inert gas for container inerting can be obtained directly from the glove box instead of the external container.
- line (251) is connected directly to the glovebox.
- Outflow from the container then takes place via line (258).
- Valve (260) and the associated wiring harness can then be omitted.
- Important in this case is an adjustable throttle device in line (258), so that the pressure acting in the glovebox pressure can be maintained.
- the invention also encompasses a process for the production of electrochemical cells using the apparatus according to the invention.
- the method includes assembly of components, entry of electrolyte and sealing of the cells.
- the components E1 to E5 are removed by means of a gripper from wells of at least one storage tray and assembled in a mounting chamber.
- the process is characterized by the following steps:
- the combination of individual steps is related to the fact that the individual components may already have a fixed connection to other components before the method is carried out.
- the individual electrodes may have a fixed connection to the respective part of the housing which is already prefabricated.
- the individual components are weighed before positioning in the slot of the mounting chamber with the balance.
- the weighed components comprise at least the components E2 and E4 (i.e., the electrodes), which are weighed separately.
- the components E2 and E4 i.e., the electrodes
- the weighed components are weighed separately.
- a comparison is made, which consists of combining those counterelectrodes in a cell whose ion accepting capacity is almost identical.
- the process step of aligning the electrodes with respect to the ion-receiving capacity contributes significantly to produce the cells with very high accuracy and thereby enable a correlation of structural and performance characteristics, which is in the use of the apparatus according to the invention and the method for research applications of great importance.
- the ion-receiving capacity of the anode is in the range of up to 30% above the value of the ion-releasing capacity of the cathode, Preferably, the ion acceptor capacity of the anode is in the range of up to 20% above the ion dispense capacity of the cathode, more preferably, the ion acceptor capacity of the anode is in the range of up to 10% above the ion dispense capacity of the cathode. In no case, however, should the ion-receiving capacity of the anode be less than the ion-releasing capacity of the cathode.
- the ion absorption capacity is preferably determined by calculation from the weight of the electrode assuming further boundary conditions.
- the tray for the tray is not tied to a specific trough. In the case of a storage tray with several troughs, for example, the location of the storage trough can be varied.
- the gripper can perform a reorganization of stored components. In the storage cavities and the separating elements can be placed, which are located between the components.
- a process procedure is preferred in which the above-mentioned process steps (i) - (viii) are preceded by the following steps:
- the enclosure flooded with protective gas, preferably glovebox (8).
- protective gas preferably glovebox (8).
- the components When carrying out the conditioning according to step (x.2), it is preferred for the components to be exposed to a reduced pressure in the range of ⁇ 5 mbara, preferably ⁇ 1 mbara and more preferably ⁇ 0.1 mbara.
- the conditioning of the individual components, in particular of the electrodes and the separators, during the introduction process is of central importance in a large number of electrochemical cell types.
- the separators may have lower thermal stability than the electrode materials.
- the separators at a temperature of from room temperature up to 70 ° C, preferably 30 to 60 ° C, and the electrodes at a temperature ranging from room temperature up to 150 ° C, preferably 40 to 120 ° C, conditioned.
- the lock has two different temperature zones for introduction, so that the conditioning of the storage trays with separators and the storage trays with electrodes in the different temperature zones of the lock takes place simultaneously.
- the conditioning of the separators and the electrodes is performed sequentially.
- the choice of the particular protective gas atmosphere in the glovebox (8) is adapted to the particular type of electrochemical cell which is manufactured in the glovebox (8).
- the atmosphere within the enclosure is controlled and controlled in the practice of the method of the invention.
- argon is preferably used as the protective gas, wherein the protective gas, preferably argon, has an overpressure whose value is in the range of 0.1 to 100 mbar, more preferably a value of 1 to 50 mbar above atmospheric pressure.
- the content of water vapor in the glove box (8) is ⁇ 100 ppm, more preferably ⁇ 10 ppm, and particularly preferably ⁇ 1 ppm, and / or the oxygen content is preferably ⁇ 1000 ppm , more preferably ⁇ 100 ppm and even more preferably ⁇ 10 ppm.
- the spatial separation of the introduction of storage trays with components by means of a first lock (23) and the discharge of finished cells by means of a second lock increases the flexibility of the apparatus. It should also be mentioned here that the conditioning of the components and in particular of the electrodes is one of the time-consuming method steps which have an influence on the duration of time for the entire production method. Therefore, it is advantageous to have at least one additional lock available.
- the second lock (10) can be designed simpler than the first lock (23) - for example, without heating device.
- the second lock preferably serves the introduction of components that are not subjected to thermal treatment or to the discharge of the finished cells or empty containers. For the production of button cells (crimp cell
- the press is equipped with a movable die. There is one in the matrix
- the die is pushed out under the ram and brought similar to a drawer in the gripping area of the gripping system. In this extended position, the components of the cell are sequentially filled. To close the cell, the movable die is moved with the cell under the press die and then pressed together with the stamp cell.
- the station for making the foil cells comprises a lower body in which a depression for receiving the foil-like components of the cell is located. Laterally there are preferably hook-like structures (such as fine saw blades) or flexible strips, which prevent the films from curling up when the film is slightly curved. Laterally movable is located above the depression a lowerable on the body heated device for three-sided sealing of the laterally projecting strips of the film housing. For the sealing of the fourth side, there is also a movable sealing device in the sealing station. The sealing devices are located below a vacuum bell. On the side where the one-sided sealing jaw is located, there is a sliding tongue. This tab is slid a few millimeters over the bottom case after placing the lower case so as to maintain a space between the bottom and top case (analogous to bookmarks located between the pages of a closed book).
- hook-like structures such as fine saw blades
- flexible strips which prevent the films from curling up when the film is slightly curved.
- Laterally movable is located above the
- the whole station can be tilted over a joint by a few degrees, so that the side on which the tongue is located points upwards.
- a groove can preferably be incorporated, via which a liquid can be brought into the interior of the film pocket. Also preferred are two or more of the gap-holding tongues.
- a scanner is located in the gripping region of the positioning system (3), preferably a line scanner, more preferably one-dimensional or two-dimensional.
- the individual parts or at least the finished arranged cell receives a bar code, so that a better findability of the finished cells is ensured.
- the marking and registration is for the area of application of the apparatus in the area of high-throughput research, because it is possible to produce a wide variety of different cells.
- the production parameters of the individual cells are detected by the program control. The later findability and identification of cells is of great importance in connection with the apparatus according to the invention.
- a downwardly directed camera (25) with an image evaluation software.
- This camera is used to inspect the surface of the electrodes and to evaluate the electrodes pointing downwards with the carrier film with regard to optically detectable errors.
- the visual inspection of the electrodes also contributes to an improvement in the apparatus according to the invention and in the method according to the invention. It is also possible to specifically investigate the influences of the surface structure of the electrodes as parameters.
- the apparatus according to the invention and the method according to the invention it is possible to produce more than fifty cells / day, preferably more than one hundred cells / day and more preferably more than two hundred cells per day.
- a very low reject rate can be achieved during production, the reject rate being ⁇ 1%, preferably ⁇ 0.5% and even more preferably ⁇ 0.1%.
- the production output of the apparatus is set to an upper limit. This is because the apparatus is not an assembly line equipment of identically constructed cells.
- the upper limit of the production capacity is in the range of 200 to 800 cells per day, preferably 200 to 400 cells per day. Special features are the low reject rate and the high quality of the manufactured cells.
- the high quality of the fabricated cells is related to the precision of positioning and matching of the ion-receiving capacity of the electrodes.
- the individual production steps are carried out in a fixed sequence.
- the method is specified in one embodiment for the production of foil cells or pouch cells, the method in this embodiment comprising the following steps: a.1) placing the lower housing film in the mounting position (2),
- the apparatus and the method are used for the production of button cells.
- the production of a button cell comprises the following steps: b.1) placing the lower housing part in the mounting position (4), the spring and the
- the temperature-controllable lock (23) serves to introduce components (components) and holders into the housing (8), in which the ion cells are assembled by the interaction of the individual production units.
- the temperature-controlled lock (23) is equipped with a vacuum pump with which the pressure can be lowered to a value of ⁇ 100 mbara, preferably ⁇ 10 mbara, more preferably ⁇ 1 mbara and particularly preferably ⁇ 0.1 mbara.
- the interior of the temperature-controlled lock is heated or cooled, with a value in the range of 10 to 150 ° C and preferably from 20 to 120 ° C is selected.
- the camera (25) can also be used to record the surface of the electrodes when taking the samples. Naturally, different algorithms for image recognition are required for this purpose than are used for correcting the spatial position.
- the housing (8) and the lock (23) can be flooded with inert gas or rinsed.
- argon is used as the inert gas.
- the interior of the housing is pressurized, the value of the pressure being in a range from 0.1 to 100 mbar, preferably in a range from 1 to 50 mbar, above atmospheric pressure.
- the gas atmosphere within the enclosure can be precisely specified and controlled.
- the water vapor content is ⁇ 100 ppm, more preferably ⁇ 10 ppm and most preferably ⁇ 1 ppm.
- the oxygen content within the enclosure is preferably ⁇ 1000 ppm, more preferably ⁇ 100 ppm and even more preferably ⁇ 10 ppm.
- the cells produced by means of the apparatus according to the invention and the method according to the invention are tested with regard to the performance characteristics and the test data are stored in the database.
- an evaluation and analysis of the performance characteristics takes place, taking into account the respective production parameters.
- the apparatus according to the invention and the method according to the invention form part of a development cycle for the development of electrochemical cells, which comprises the following stages:
- V Algorithm for optimizing the cycle. After completion of a first development cycle, the analysis result from the characterization of the cells can be used to create a production plan for a second development cycle. The entire development cycle can be run through several times, with the process parameters, in particular the electrolyte properties and the properties of the cathodes, being varied.
- FIG. 1 shows a schematic representation of the assembly apparatus in the form of an overview view.
- the apparatus shown is equipped with two locks (23, 10).
- the storage bins (13, 15, 17, 19) are equipped in the interior of the glove box with four storage trays, with a storage tray with electrolyte vessels is located above the storage bins (no reference numeral).
- Figure 2.a shows a schematic representation of a component of a cell (102) which lies in the recess (101) of a separating element (103).
- Figure 2.b shows a schematic representation of a stack-shaped arrangement of five separating elements (103) and five components (102). On the upper side of the individual separating elements, there are depressions in the outer area in which the centering noses of the separating elements located above are fixed.
- Figure 2.c shows a side view of a tray tray (152), in which two populated troughs and a gripper for handling elements can be seen.
- FIG. 4a shows a schematic representation of the method steps during the tuning of the electrode elements, which are first transferred from the stack (200) to the balance (201) and then depending on the result of the weighing of either the assembly station (202) or the waste position (203 ). The elements, which are placed in the waste position, should not continue to be used, they are disposed of.
- FIG. 4.b shows a schematic representation of the method steps during the tuning of the electrode elements, which corresponds to the flow chart shown in FIG.
- the apparatus is equipped with separate stacks for electrode elements, so that the supply of the cathode and the anode is carried out from separate stacks.
- Figure 5.a shows a schematic representation of a tray equipped with 6 x 3 wells tray in the plan view, each side has two coupling elements (220, 222).
- Figure 5.b shows a side view of two storage trays, which are connected to each other via hook-shaped coupling elements (220).
- Figure 5.c shows a schematic representation of a tray equipped with 6 x 3 troughs, which is analogous to the tray in Figure 5. a, but it has other magnetic coupling elements on the side.
- Figure 6.a shows a schematic representation of a magnetic coupling element. Detailed illustration of the coupling element (220) from FIG. 5.c.
- Figure 6.b shows a schematic representation of an apparatus which is equipped with containers for cleaning liquid or liquid waste.
- handling system in this case designed as a portal system
- Lock door between heated lock and work area Storage place for objects undergoing conditioning steps; for example, cathodes and anodes heated lock
- Hooks complementary to hooks (222)
- Holding device such as nut
- Container for cleaning fluid shown is the variant with
- the tube (256) ends a few cm above the container bottom; in the variant for the discharge of liquids, the tube (256) protrudes only a few cm into the container
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Materials Engineering (AREA)
- Primary Cells (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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KR1020157016119A KR20150089036A (ko) | 2012-11-22 | 2013-11-12 | 전기화학 전지를 제조하기 위한 장치 및 방법 |
US14/430,372 US20150249258A1 (en) | 2012-11-22 | 2013-11-12 | Apparatus and method for producing electrochemical cells |
CN201380060784.0A CN104798241A (zh) | 2012-11-22 | 2013-11-12 | 生产电化学电池的设备和方法 |
EP13789781.5A EP2923406A1 (de) | 2012-11-22 | 2013-11-12 | Apparatur und verfahren zur herstellung von elektrochemischen zellen |
JP2015543385A JP2015536553A (ja) | 2012-11-22 | 2013-11-12 | 電気化学セルを製造するための装置及び方法 |
Applications Claiming Priority (4)
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US201261729360P | 2012-11-22 | 2012-11-22 | |
EP12193837 | 2012-11-22 | ||
EP12193837.7 | 2012-11-22 | ||
US61/729,360 | 2012-11-22 |
Publications (1)
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WO2014079725A1 true WO2014079725A1 (de) | 2014-05-30 |
Family
ID=47323915
Family Applications (1)
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PCT/EP2013/073540 WO2014079725A1 (de) | 2012-11-22 | 2013-11-12 | Apparatur und verfahren zur herstellung von elektrochemischen zellen |
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Country | Link |
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US (1) | US20150249258A1 (de) |
EP (1) | EP2923406A1 (de) |
JP (1) | JP2015536553A (de) |
KR (1) | KR20150089036A (de) |
CN (1) | CN104798241A (de) |
WO (1) | WO2014079725A1 (de) |
Cited By (6)
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CN104409777A (zh) * | 2014-11-08 | 2015-03-11 | 苏州三屹晨光工业设备有限公司 | 电池冷热压机 |
EP2853849A1 (de) * | 2013-09-27 | 2015-04-01 | M+W Germany GmbH | Trockenraum, insbesondere für den Einsatz bei der Lithium-Ionen-Zellfertigung |
US20200212494A1 (en) * | 2018-03-27 | 2020-07-02 | Lg Chem, Ltd. | Apparatus and method for manufacturing secondary battery |
WO2020174080A1 (de) | 2019-02-28 | 2020-09-03 | Hte Gmbh The High Throughput Experimentation Company | Automatisierung von laborprozessen durch eine laborprozessunterstützungsvorrichtung |
CN112461902A (zh) * | 2020-12-10 | 2021-03-09 | 南杰智汇(深圳)科技有限公司 | 可拆卸的多功能软包电池模具 |
DE102020111274A1 (de) | 2020-04-24 | 2021-10-28 | Volkswagen Aktiengesellschaft | Verfahren und Vorrichtung zur Herstellung von Metall-Verbundfolien für Batteriezellen |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2020014268A1 (en) * | 2018-07-09 | 2020-01-16 | 24M Technologies, Inc. | Continuous and semi-continuous methods of semi-solid electrode and battery manufacturing |
KR102317265B1 (ko) | 2018-11-02 | 2021-10-22 | 주식회사 엘지에너지솔루션 | 로봇 아암을 포함하는 로봇 |
CN110148791B (zh) * | 2019-05-14 | 2024-04-16 | 广东鸿宝科技有限公司 | 异形电池全自动抽液成型生产线 |
CN112531198B (zh) * | 2020-12-04 | 2022-11-29 | 孚能科技(赣州)股份有限公司 | 一种电池模组装配装置及方法 |
DE102022134785B3 (de) * | 2022-12-23 | 2023-10-19 | Mb Atech Gmbh | Verfahren und Vorrichtung zur Herstellung einer Batterie |
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Cited By (8)
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EP2853849A1 (de) * | 2013-09-27 | 2015-04-01 | M+W Germany GmbH | Trockenraum, insbesondere für den Einsatz bei der Lithium-Ionen-Zellfertigung |
CN104409777A (zh) * | 2014-11-08 | 2015-03-11 | 苏州三屹晨光工业设备有限公司 | 电池冷热压机 |
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WO2020174080A1 (de) | 2019-02-28 | 2020-09-03 | Hte Gmbh The High Throughput Experimentation Company | Automatisierung von laborprozessen durch eine laborprozessunterstützungsvorrichtung |
DE102020111274A1 (de) | 2020-04-24 | 2021-10-28 | Volkswagen Aktiengesellschaft | Verfahren und Vorrichtung zur Herstellung von Metall-Verbundfolien für Batteriezellen |
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Also Published As
Publication number | Publication date |
---|---|
KR20150089036A (ko) | 2015-08-04 |
JP2015536553A (ja) | 2015-12-21 |
US20150249258A1 (en) | 2015-09-03 |
EP2923406A1 (de) | 2015-09-30 |
CN104798241A (zh) | 2015-07-22 |
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