Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/04—Construction or manufacture in general
  • H01M10/0404—Machines for assembling 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
  • H01M10/04—Construction or manufacture in general
  • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
  • Y02E60/10—Energy storage using batteries
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
  • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

• the present invention is based on a device for producing an energy storage cell, which serves for introducing an electrode arrangement into a cell housing.
• electrochemical energy storage cells consist of electrode arrangements which are arranged in electrolyte-filled cell housings.
• the cell housing is used for hermetic sealing, as well as for protecting the electrode assembly from external environmental influences.
• the individual layers of electrodes and separators of such electrode arrangements are comparatively sensitive to mechanical stresses. Damage to individual layers can lead to short circuits when using the finished energy storage cell, which causes high currents in the interior of the energy storage cell and thus trigger fire and explosion hazards.
• the electrode assembly should be able to be introduced into such cell housing, which are relatively small in size or even have undersize.
• a device for producing an energy storage cell wherein the device has a delivery unit for introducing an electrode assembly into a cell housing along an insertion direction and wherein the device comprises a pressing unit for compressing the energy storage cell along a direction perpendicular to the insertion direction pressing direction.
• the device according to the invention has the advantage over the prior art that the energy storage cell, while being introduced into the cell housing, combines is pressed.
• the electrode assembly can be packaged in a simple manner in a compact cell housing, without causing the risk of hooking or jamming of the electrode assembly in the insertion of the cell housing.
• integration of the electrode arrangement into cell housing with undersize is made possible.
• the compacting of the electrode assembly further ensures that damage to the outer layers or sheath of the electrode assembly when introduced into the cell housing is prevented because the friction between the housing wall and the electrode assembly is reduced during the insertion process.
• the electrode arrangement comprises a plurality of electrodes and separators, which are alternately stacked or rolled.
• the compression of the electrode arrangement ensures that air, which is located, for example, between the individual layers of electrodes and separators, is pressed out of the electrode arrangement and thus the electrode arrangement assumes a more compact form. Furthermore, due to the elasticity of the individual layers, the electrode arrangement can also be compressed into a compact form by means of the pressing unit. It is conceivable that the electrode arrangement of electrodes and separators is additionally surrounded by an outer envelope.
• the finished energy storage cell consisting of the cell housing and the inserted into the cell housing electrode assembly acts either as an electrical capacitor or as an electrochemical energy storage cell in the form of a battery, if in addition an electrolyte is filled into the cell housing and the energy storage cell is subsequently formed in an electrical charging process.
• the insertion unit comprises a plug-in unit for introducing the electrode assembly into the cell housing.
• the electrode arrangement it would also be conceivable for the electrode arrangement to be drawn into the cell housing by means of a feed unit designed as a single-feed unit.
• the pressing unit comprises at least a first pressing member and at least a second pressing member between which the electrode assembly is compressible, wherein the pressing unit between a pressing state in which the first and the second pressing member for pressing the electrode assembly along the pressing direction are approximated, and a release state in which the first and the second pressing member for releasing the electrode assembly are spaced apart, is movable.
• the first and second pressing element are preferably movable by the insertion unit along the direction of insertion in the direction of the cell housing.
• the electrode Accordingly, the ring is advantageously compressed between the first and the second pressing element, which move along with the electrode arrangement when the electrode arrangement is inserted or pushed into the cell housing. As a result, a comparatively gentle handling of the outer surface of the electrode assembly is achieved, since a frictional or shearing movement between the outer surface and the press assembly pressing the press assembly is prevented. In this way, the risk of damage to the electrode assembly is significantly reduced.
• the device is designed such that the pressing unit is transferred from the pressing state to the release state when the first and second pressing element come close to the cell housing.
• the first and second pressing element are not guided into the cell housing, but transferred shortly before reaching the insertion opening of the cell housing in the release division.
• the pressing elements must therefore not be removed again later from the cell housing, which again would cause the risk of damage to the electrode assembly, nor the pressing elements must remain in the final energy storage cell, whereby the manufacturing cost can be reduced and the compactness of the energy storage cell can be increased.
• the pressing unit has a first base body which is movable along the pressing direction, wherein a plurality of first pressing elements are guided through the first base body, and wherein the pressing unit has a second base body movable along the pressing direction, wherein a A plurality of second pressing elements are guided by the second base body.
• the first base body preferably has a first link in which the plurality of first pressing elements are guided, while the second base body has a second link in which the plurality of second pressing elements are guided, wherein the first and second pressing elements each as perpendicular to Insertion direction and perpendicular to the pressing direction extending rollers are formed.
• the electrode assembly is thus compressed between a plurality of rollers formed as first and second pressing elements, which are forcibly guided by link guides and jointly encompass a movement of the body through an electrode assembly and can insert into a cell housing.
• the device according to the invention can thus be integrated into a mechanical production line for the mass production of energy storage cells. Due to the high degree of automation, the production costs and production times for energy storage cells can thereby be reduced.
• the first link has a step between a first link area and a second gate area, wherein the first pressing elements are arranged in the first link area and during the release state in the second link area during the pressing state, and wherein the second Gate has a further stage between a further first gate area and a further second gate area, wherein the second pressing elements are arranged during the pressing state in the further first gate area and during the release state in the further second gate area.
• the step and the further step are preferably designed such that a distance between the first gate area and the further first gate area is smaller than a distance between the second gate area and the further second gate area parallel to the displacement direction.
• the device is designed such that during the continuous introduction of the electrode assembly into the cell housing by means of the introduction unit, the first pressing elements successively from the first gate area on the stage in the second gate area and the second pressing elements successively from the other first stage area are transferred via the further stage in the other second gate area.
• the pressing elements are thus automatically and successively transferred from the press position to the release position.
• the device has two first base body and two second base body, wherein one end of the first pressing elements in each case in the first link of a first body and the other end of the first pressing elements in each case in the first link another first base body are guided and wherein one end of the second pressing elements are each guided in the second link of a second base body and the other end of the second pressing elements in each case in the second link of the other second base body.
• the ends of the pressing elements are each arranged rotatably about their own axis in the scenes, so that any relative movement between the electrode assembly and the pressing elements along the insertion direction not immediately to damage the outer surface of the electrode assembly by friction and Shearing forces leads.
• the preferably designed as rollers pressing elements are also forcibly guided on both ends in each case by the scenes.
• Another object of the present invention is a transport system comprising an inventive device for producing an energy storage, wherein the transport system comprises a transport mechanism for moving the device, wherein the transport mechanism is configured to a clamped between the at least one first and a second pressing member electrode assembly to a To transport cell housing.
• the pressing elements thus serve not only for compressing the electrode assembly when inserting the electrode assembly into the cell housing, but additionally also for gripping the electrode assembly and for transporting the gripped electrode assembly to the cell housing.
• the four functions of gripping the electrode assembly, transporting the electrode assembly to the cell housing, compressing the electrode assembly, and inserting the electrode assembly into the cell housing can be integrated into a single device. It is conceivable that the electrode assembly is already pressed together during transport to the cell housing by means of the pressing elements, so that the transport time to the cell housing can already be used to push air out of the electrode assembly.
• Another object of the present invention is a method for producing an energy storage cell, in particular with the device according to the invention, wherein an electrode assembly is inserted by means of a loading unit along a direction of introduction into a cell housing, wherein the electrode assembly during insertion into the cell housing at least partially along a pressing unit a pressing direction perpendicular to the pressing direction is compressed.
• a particularly simple, safe and damage-free arrangement of the electrode arrangement in the cell housing is thus achieved, since the electrode arrangement is compacted before or during the introduction into the cell housing by means of the pressing unit.
• the electrode arrangement is compressed in particular between at least one first and one second pressing element of the pressing unit.
• the electrode assembly is inserted into the cell housing. It would also be conceivable, however, for the electrode arrangement to be pulled into the cell housing, for example.
• the electrode assembly is clamped between the at least one first and second pressing member before being introduced into the cell housing and the clamped Electrode assembly is transported by a transport mechanism to the cell housing.
• the pressing unit thus serves both for transporting the electrode arrangement and for compressing the electrode arrangement. It is conceivable that the air is thus already pressed out of the electrode arrangement during the transport of the electrode arrangement to the cell housing.
• the air thus has sufficient time to escape from the electrode arrangement in a manner that is gentle on the electrode arrangement.
• the electrode assembly in the third step, is compressed by a plurality of first and second pressing elements, wherein when introducing the electrode assembly into the cell housing, the first and second pressing elements are successively spaced apart along the pressing direction.
• the electrode assembly is thus compressed as long as possible and the pressing elements only moved apart shortly before reaching the cell housing, so that the pressing elements do not come into contact with the cell housing.
• Figures 1 and 2 show a schematic perspective view and a schematic
• FIGS. 1 and 2 are a schematic perspective view and a schematic sectional view of a device 1 and a method for producing an energy store according to an exemplary embodiment of the present invention.
• the device 1 has an insertion unit 3, which is provided for introducing an electrode arrangement 2 into a cell housing 4 along an insertion direction 5.
• one end of the electrode assembly 2 is located immediately in front of an insertion opening of the cell housing 4 and along the insertion direction 5 in coincidence with the cell housing 4.
• the insertion unit 3 has a punch 17, which acts on an end face of the electrode assembly 2 to the electrode assembly 2 in the cell case 4 to push.
• the electrode arrangement 2 comprises a layer structure of electrode and separator layers, which are alternately stacked or rolled into one another in a known manner.
• this layer or winding structure is still packaged in an outer shell in the form of a film.
• the respective contacts of the two electrode layers run on the pole contacts 18 of the electrode arrangement 2 arranged on the front side.
• the device 1 further comprises a pressing unit 6, which is provided for compacting the electrode assembly 2 before and at least partially during insertion into the cell housing 4.
• the pressing unit 6 is designed in such a way that the electrode arrangement 2 is compressed along a pressing direction 7 perpendicular to the introduction direction 5. In this case, air located between the electrode and separator layers is pressed out of the electrode arrangement 2 and the flexible electrode and separator layers are compressed in order to compact the electrode arrangement 2 and to be able to introduce it into the compact cell housing 4 without damage.
• the cell housing 4 is dimensioned with a slight undersize relative to the electrode assembly 2, so that the finished energy storage cell is as compact as possible and the electrode assembly 2 is included in the cell housing 4 almost no play.
• the pressing unit 6 comprises two first main body 10 and two second main body 1 1.
• first base body 10 and a second base body 1 1 is illustrated in Figures 1 and 2.
• the two first basic body 10 and the two second basic body 1 1 can each be moved synchronously along the pressing direction 7.
• the first main body 10 each have a first slide 12 extending substantially along the direction of insertion 5.
• the first link 12 has a step 14, which divides the first link 12 into a first link area 12 'and a second gate area 12 ".
• first pressing elements 8 are guided in the form of rollers End of each roller is stored in the first link 12 of a first body 10, while the other end of each roller in the first link 12 of the other first body 10th is stored.
• the rollers therefore extend along a transverse direction 19 perpendicular to the insertion direction 5 and to the pressing direction 7. Furthermore, each roller is rotatably supported in the first links 12 along its own axis of rotation.
• the first pressing elements 8 are furthermore displaceable along the first slotted links 12, so that the first pressing elements 8 can be transferred one after the other from the first slotted region 12 'via the step 14 into the second slotted region 12 "
• the second basic bodies 11 are the first basic bodies 10 with respect to a centrally through the electrode assembly 2 and parallel to the insertion direction 5 and the transverse direction 19 extending symmetry plane mirrored in other words: the second main body 1 1 each have a second link 13, which through a further stage 15 in a further first gate area 13 'and in a further second gate area 13 "is divided.
• a plurality of second pressing elements 9 is guided in an analogous manner, which are formed identical to the first pressing elements 8.
• the second pressing elements 9 can in turn be rotated about their own axis, as well as along the second link 13 between the other first and the further second link area 13 ', 13 "are moved over the further stage 15.
• the step 14 and the further step 15 are formed to one another such that the first gate area 12 'and the further first gate area 13' have a smaller distance from one another along the pressing direction 7 than the second gate area 12 "and the further second gate area 13" to each other ,
• the distance between the first gate area 12 'and the further first gate area 13' is chosen in particular such that it corresponds to the internal dimension of the cell housing 4 along the pressing direction 7.
• the distance between the second gate area 12 "and the further second gate area 13" however, in particular selected such that in the second gate area 12 "located first pressing elements 8 and in the other second gate area 13" located second pressing elements 9 along the pressing direction 7 outside the outer wall of the cell case 4 are located.
• the step 14 is designed in such a way that first pressing elements 8 located in the first link region 12 'run into the second link region 12 "almost without increased resistance when they are subjected to force by the introducing unit 3 via the step 14 along the direction of insertion 5.
• FIG further stage 15 formed such that in the further first link area 13 'located second pressing elements 9 run virtually without increased resistance in the other second link area 13 "when they are subjected to force by the insertion unit 3 on the further stage 15 away along the insertion direction 5.
• the punch 17 has two longitudinal jaws 20, which for the application of force to the first and second pressing elements 8, 9 are provided in the direction of the insertion direction 5 during the insertion of the electrode assembly 2 into the cell housing 4.
• the introduction of the electrode assembly 2 into the cell housing 4 is now carried out as follows: First, the first pressing elements 8 are in the first gate area 12 'and the second pressing elements 9 in the further first gate area 13'. In addition, the two first base body 10 and the two second base body 1 1 along the pressing direction 7 are spaced apart.
• the device 1 is now moved as part of a transport system 16 by means of a transport mechanism (not shown) via an electrode assembly 2 to be mounted. Subsequently, the two first base body 10 and the two second base body 1 1 along the pressing direction 7 to move toward each other, whereby the electrode assembly 2 between the first and second pressing elements 8, 9 is clamped. The electrode assembly 2 is thereby compressed and compacted.
• the device 1 is then moved by means of the transport mechanism to an empty, still to be filled cell housing 4.
• the electrode assembly 2 is brought into coincidence with the insertion opening of the cell housing 4 along the insertion direction 5.
• the first gate area 12 'and the further first gate area 13' are then located along the insertion direction 5 at the level of the electrode arrangement 2, while the second gate area 13 'and the further second gate area 13 "are at the level of the cell housing 4.
• the introduction unit 3 is now actuated, so that the electrode assembly 2 is displaced by the punch 17 along the insertion direction 7 into the cell housing 4.
• the longitudinal jaws 20 move synchronously to the electrode assembly 2, the first and second pressing elements 8, 9 through the first and second scenes 12, 13.
• the electrode assembly 2 is compressed before insertion into the cell housing 4 of the first and second pressing elements 8, 9.
• the first and second pressing elements 8, 9 successively reach the step 14 and the further step 15, they slip into the second and further second gate area 12 ", 13" and release the electrode arrangement 2.
• the first and second pressing members 8, 9 thereby circumnavigate the cell case 4.
• the apparatus 1 is removed from the cell case 4 by the transporting mechanism.
• the electrode assembly 2 located in the cell case 4 forms together with the cell case 4 now an energy storage.
• the energy store is either left in this state and then acts as a condenser or the cell housing 4 is filled and sealed in subsequent steps with an electrolyte, and the electrode assembly 2 formed by charging, so that an electrochemical energy storage in the form of a battery or a capacitor is generated ,

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• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Secondary Cells (AREA)
• Battery Electrode And Active Subsutance (AREA)

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Citations (3)

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• 2012
  • 2012-08-03 DE DE102012107161.6A patent/DE102012107161B4/de not_active Expired - Fee Related
• 2013
  • 2013-07-30 WO PCT/EP2013/065950 patent/WO2014020005A1/fr not_active Ceased

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