WO2025003183A1 - Dispositif d'accueil de cellules électrochimiques pour former un module de batterie - Google Patents
Dispositif d'accueil de cellules électrochimiques pour former un module de batterie Download PDFInfo
- Publication number
- WO2025003183A1 WO2025003183A1 PCT/EP2024/067893 EP2024067893W WO2025003183A1 WO 2025003183 A1 WO2025003183 A1 WO 2025003183A1 EP 2024067893 W EP2024067893 W EP 2024067893W WO 2025003183 A1 WO2025003183 A1 WO 2025003183A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- clamps
- pair
- electrochemical cells
- opposite
- clamp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
- H01M50/51—Connection only in series
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/251—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for stationary devices, e.g. power plant buffering or backup power supplies
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
-
- 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 relates to a device for receiving electrochemical cells to form an accumulator battery module as well as to a method for recovering electrochemical cells from a motor vehicle battery module.
- Electric or hybrid vehicle storage batteries particularly lithium-ion batteries
- Used batteries are then most often recycled. To do this, they are collected and then dismantled to be able to recover each component and thus send them to appropriate recycling channels, given the materials they are made of. Used batteries can also be reused. Indeed, although they are no longer usable for mobility applications, they can still be used for stationary applications, for example for the storage of photovoltaic or wind energy, or to regulate the electricity network between off-peak and peak hours.
- a device for receiving n electrochemical cells to form a battery module, each of the n electrochemical cells comprising two faces opposite each other and two conductive tabs extending respectively from said two faces opposite each other.
- the device comprises two parallel sets of n clamps, the n clamps of one of said two sets extending respectively opposite the n clamps of the other of said two sets, to be able to receive the electrochemical cells in parallel so that the two opposite tabs of each cell respectively engage in two opposite clamps.
- the n clamps of one of said sets are alternately electrically connected two by two from the second clamp while the n clamps of the other of said sets are alternately electrically connected two by two. from the first clamp to be able to electrically couple in series said n electrochemical cells.
- one of the characteristics of the invention lies in the implementation of a device capable of receiving electrochemical cells to produce a new battery module.
- the function of the clamps is to grip the tabs, or connection plates, of the electrochemical cells in a vice to hold them in the host device and to make electrical contact between the cells.
- the gripping surface of the clamps is chosen and adapted so that they can grip tabs regardless of their size. It is therefore not necessary to modify the structure of the electrochemical cells for their use in this device.
- each clamp comprises two symmetrical branches articulated relative to each other around a pivot connection, so as to define a pair of jaws and a pair of drive ends opposite said pair of jaws relative to said pivot connection.
- the pair of jaws is also sized to grip tabs of any size.
- the jaws of the pair of jaws are substantially flat so as to obtain optimal contact between the pair of jaws and the tab and consequently, obtain good electrical contact between the two.
- each of said n clamps comprises an elastic member mounted between its drive ends to force them opposite each other around said pivot connection.
- the elastic member may be of any shape.
- the elastic member is a helical spring.
- the n clamps are adapted to be controlled by a control assembly.
- control assembly comprises a rod passing through the pair of drive ends of each of the n clamps, the rod comprising a plurality of pairs of fingers adapted to cooperate with the pair of drive ends of each of the n clamps by forming a ramp to bring the ends of the pairs of drive ends closer together.
- the drive ends respectively have two facing orifices through which the rod passes. The fingers will then cooperate with the external surface of the drive ends around the orifices.
- the plurality of pairs of fingers By cooperating with the pair of ends of each of the clamps, the plurality of pairs of fingers will thus make it possible to bring the ends of the pair of ends closer together and thus separate the jaws of the pair of jaws.
- the spring will exert a restoring force on the ends of the pair of ends to separate the ends of the pair of ends and thus bring the jaws of the pair of jaws closer together.
- the plurality of pairs of fingers will in particular cooperate with the pair of drive ends of each of the n clamps when the rod is driven in rotation.
- the rod also passes through the elastic member in addition to the pairs of drive ends to improve the compactness of the control assembly.
- the opposite surfaces of the pair of drive ends of each of the n clamps have a concave surface and the pair of fingers cooperates with the concave surface by forming a ramp.
- the opposite surfaces of the pair of drive ends have a parabolic cylindrical surface.
- the pair of fingers is driven in movement around the rod and moves in support of the concave surface and cooperates with it by exerting a force at the edge of the orifice on the concave surface.
- the drive ends will then move closer to each other, compressing the elastic member, and thus allow the pair of jaws to open.
- one clamp out of two starting from the first clamp is adapted to be controlled by a first control member such as the control assembly described above, while one clamp out of two starting from the second clamp is adapted to be controlled by a second control member such as the control assembly described above.
- an electrically conductive plate is arranged between the jaws of the pair of jaws of each clamp, said conductive plate being connected to the pivot connection.
- each jaw is equipped with a plate connected to the pivot connection. And each of the tabs is then pinched between the two plates of the two jaws.
- the rest of the clamps such as the pair of jaws and the pair of ends can be made of an insulating material.
- the device comprises riders made of an electrically conductive material, each having two axes, each of the axes forming a pivot and cooperating with the pivot connection of two contiguous clamps to electrically connect them together.
- Another object of the invention is a method for recovering n electrochemical cells. of a motor vehicle battery module, each of the n electrochemical cells comprising two electrodes extending inside said electrochemical cell and extending outside said cell, the extensions of the electrodes of the n electrochemical cells being alternately electrically welded two by two from the second extension, the opposite extensions of the n electrochemical cells being alternately electrically welded two by two from the first extension to be able to electrically couple said n electrochemical cells in series.
- the recovery method comprises: cutting, for each of the n cells, the extensions of the electrodes, at a pre-cut area, to release two tabs extending from opposite faces of each cell; installing each cell in a host device as described above.
- This process has the advantage of being able to recover the electrochemical cells without destroying the two extensions with a view to their reuse, in particular thanks to the pre-cut zone which provides an easy and localized cutting zone for the operator or the machine which will operate it.
- the extensions have a predetermined thickness to allow the optimal passage of current despite the pre-cut area which substantially halves the section of the extensions. Consequently, after cutting, the tabs thus released would theoretically allow the section to be doubled and consequently the flow rate of the current to be doubled.
- FIG. 1 is a schematic three-quarter perspective view of a battery module according to the prior art
- FIG. 2 is a partial schematic view of a detail element of the object of [Fig. 1] of the prior art
- FIG. 3 is a schematic perspective view of the assembly of two elements of [Fig. 2] according to the prior art
- FIG. 4 is a schematic perspective view of the assembly of two elements of [Fig. 2] according to the invention.
- FIG. 5a is a schematic three-quarter perspective view of a reception device according to the invention.
- FIG. 5b is a schematic top view of the object of [Fig. 5a];
- FIG. 6 is a schematic three-quarter perspective view of a detail element of the object of [Fig. 5a];
- FIG. 7 is a schematic three-quarter perspective view of another detail element of the object of [Fig. 5a];
- FIG. 8 is a schematic three-quarter perspective view of a reception device according to one embodiment of the invention.
- FIG. 1 shows a battery module 1 usually used for powering motor vehicles.
- This module 1 firstly comprises a casing 2 provided with a cover 3 to protect the interior of the module 1.
- the casing 2 and the cover 3 extend longitudinally and together form a substantially parallelepiped element. They are made of insulating materials usually used in motor vehicles, such as acrylonitrile butadiene styrene, or its acronym ABS.
- the cover 3 has two opposite ends and also two orifices 4 at one of these ends.
- the module 1 also comprises, in accordance with the example presented here, ten electrochemical cells 6. Each electrochemical cell 6 can deliver a voltage of at most
- FIG. 2 shows a part of an electrochemical cell 6.
- the electrochemical cell 6 extends longitudinally between two ends and comprises two electrodes, only one 7 of which is shown here. Furthermore, the electrochemical cell 6 is filled with a liquid electrolyte which extends between the two electrodes 7 for carrying out the electrolysis (not shown in the figure).
- connection plate has a portion 8 which extends inside the cell 6 to be connected to the electrode 7, and a free portion 9 which extends outside the cell 6 by forming an extension.
- the portion 8 and the free portion 9 of the cell are made of a single piece which passes through an insulator 10 made of polymer to seal the cell and thus guarantee its watertightness.
- the extensions 9 of the cells are generally oversized in that they have a surface area much greater than what is necessary for the intensity of the circulating current to be sufficient for the operation of the battery.
- the electrochemical cells 6 are well known to those skilled in the art, their principle will therefore not be detailed here.
- the cells 6 are connected together by welding at the extension 9 of the electrodes.
- the extensions 9 of the electrodes are welded to a metal comb 11 to thus ensure electrical contact between each cell.
- the extensions of the electrodes are bent back.
- the metal comb 11 can be made of a metal or a conductive alloy.
- the comb 11 is made of copper.
- the extensions 9 of the electrodes of the ten electrochemical cells are alternately welded two by two from the second extension, while the opposite extensions 9 of the same ten electrochemical cells are alternately welded two by two from the first extension.
- the module will have a electrical architecture with two electrochemical cells in parallel and the groups of two cells in parallel will be connected five times in series, i.e. ten electrochemical cells in total.
- the electrochemical cells 6 used in electric batteries have a life cycle of approximately 1000 charges/discharges. However, when the cells have completed approximately 700 cycles, they are no longer powerful enough to efficiently power the vehicle. The battery module is therefore replaced and is then reused according to a recovery process in accordance with the invention.
- the recovery method comprises a first step consisting of cutting, for each electrochemical cell 6’, the extension of the electrodes 9’ to separate the welded part 13 from the rest of the cell.
- the cutting thus makes it possible to release two opposite tabs 12 from each cell.
- a pre-cut zone 14 is produced at the level of the extensions 9’.
- the pre-cut zone is produced by punching and it consists of orifices crossing the entire thickness of the extensions 9’ and being aligned and distributed regularly over the entire width of the extensions 9’.
- the cutting at this zone 14 is carried out automatically by a robot or by an operator using a cutter 37.
- the cutter is made of an insulating material such as ceramic or an electrically neutral material.
- connection plate and consequently of the extension 9’ is chosen to be able to convey a maximum quantity of current despite the perforations of the pre-cut area which by nature reduce the quantity of conductor. Also, after cutting, an even greater quantity of current will be able to pass through the tab.
- the recovery method comprises a step consisting of installing each cell 6’ in a receiving device 15 according to the invention and described below.
- the receiving device 15 is adapted to form a storage battery module capable of being used in particular for stationary applications. This is the case, for example, for the storage of photovoltaic or wind energy. Also, such storage battery modules can advantageously be used to accumulate the energy of power plants during off-peak periods and to be able to restore it during peak periods.
- the receiving device 15 firstly comprises a casing 16 for protecting the inside of the device 15.
- the casing 16 being adapted to be covered by a cover not shown in [Fig. 5a]
- the casing 16 and the cover are of a substantially parallelepipedal general shape and they extend longitudinally. They are made of insulating materials usually used in batteries such as acrylonitrile butadiene styrene.
- the cover (not shown) has two opposite ends and also two holes at one of its ends. These holes allow the passage of the two poles 17 of the battery: a negative pole and a positive pole to thus connect the battery to the electrical circuit.
- the reception device 15 comprises two parallel sets 18, 19 of ten identical clamps 20.
- electrochemical cells there are as many 6’ electrochemical cells as there are pairs of clamps opposite each other.
- the number of cells is not limited to ten since depending on the desired maximum voltage there may be more or less. Similarly, the number of cells may be different from the number of cells in the module from which they come.
- the ten clamps 20a of the set 18 are alternately electrically connected two by two from the second clamp 20al and up to the penultimate, while the ten clamps 20b of the other set 19 are alternately electrically connected two by two from the first clamp 20b 1 and up to the last, to be able to electrically couple in series the ten electrochemical cells 6'.
- the electric current will therefore flow according to a circuit 40 shown in thick line in [Fig. 5b],
- a clamp 20 comprises two parallel branches 21a, 21b articulated one on the other around a pivot connection 22, defining a pair of jaws 23 and a pair of drive ends 24 opposite said pair of jaws 23 relative to said pivot connection 22.
- the clamps are not limited to this single embodiment.
- the branches can be crossed at the pivot connection (not shown in the figures).
- the clamp may be made of a conductive metallic material or an insulating material.
- the clamp is made of a polymer material, for example ABS.
- the clamp 20 may comprise two electrically conductive metal plates 25 such as copper. These plates 25 are arranged between the jaws 23 of the pair of jaws of each branch 21a, 21b and they are connected to the pivot connection 22.
- each of the ten clamps comprises an elastic member 26 mounted between the drive ends of each of said pairs to drive them at forces opposite to each other.
- the elastic member 26 will then cooperate with the drive ends 24 to open and close the clamps 20. Indeed, when the ends of the pair of ends 24 are brought closer to each other, forces are exerted on the elastic member 26 so as to compress it, and thus the jaws 23 of the pair of jaws move apart from each other and the clamp 20 opens.
- the opening of the clamps is not limited to this single embodiment. According to another embodiment, when the branches are crossed at the pivot connection, the jaws are spread apart when no stress is exerted on the elastic member and vice versa (not shown in the figures).
- the opening and closing of the ten clamps 20, for each of the two sets 18, 19, is controlled by a control assembly 27 shown in [Fig. 7],
- control assembly 27 will be described with respect to [Fig. 7] and [Fig. 6]. It comprises a rod 28 passing through the pair of drive ends 24 of each of the ten clamps 20.
- the rod passes through the ends of the pair of ends 24 via orifices 4L.
- the orifices 41 are provided in the center of each end of the pair of ends 24 and in the hollow, each defining an edge 42 and a border extending around each of them.
- the orifices 41 of the two ends of each of the pairs are opposite each other.
- the rod 28 passes through the orifices 41 and the elastic member 26 as shown in [Fig. 7].
- the elastic member 26 consisting of a helical spring is installed between the two ends of each of the pairs of ends 24.
- the rod comprises a plurality of pairs of fingers 29 adapted to cooperate with the pair of drive ends 24 of each of the ten clamps 20 by forming a ramp to be able to bring the ends of each of the pairs of drive ends 24 closer to each other.
- the fingers 29 of each of the pairs of fingers extend projecting from the rod 28 and are diametrically opposed.
- the pair of fingers 29 is formed of a pin passing through the rod 28 from one side to the other.
- the clamps can be opened and closed by exerting force on the ends of the pairs of drive ends, either by means of the pair of fingers to open the clamps or by means of the elastic member to close the clamps.
- the plurality of pairs of fingers 29 will make it possible to bring the ends of the pair of ends closer together by exerting a force on them and thus make it possible to move the jaws of the pair of jaws apart.
- the spring will exert a restoring force on the ends of the pair of ends to move the ends of the pair of ends apart and thus bring the jaws of the pair of jaws closer together.
- the opening of the clamps is not limited to this single embodiment.
- the plurality of pairs of fingers will make it possible to bring the ends of the pair closer together. ends by exerting a force on them and thus allowing the jaws of the pair of jaws to come together.
- the spring will exert a restoring force on the ends of the pair of ends to move the ends of the pair of ends apart and thus move the jaws of the pair of jaws apart.
- the opposite surfaces 30 of the pair of drive ends 24 of each of the ten clamps 20 have a concave surface, and more precisely a parabolic cylindrical surface having an extremum.
- the opposite surfaces each have a generator, following this extremum, and extending in the direction of the branches 21a, 21b.
- the two pairs of fingers 29 move away from the generatrix of the extremum and are then driven in friction against the two opposite surfaces 30 in the edges of each of the orifices 41 forming a ramp, and thereby drive the two drive ends 24 towards each other while compressing the elastic member 26. Then, the jaws 23 move away from each other and allow the opening of the clamp.
- the control assembly 27 also comprises a wheel 38 allowing the operator to rotate the rod 28 and thereby simultaneously drive the plurality of pairs of fingers 29. In this way, all the clamps can be controlled simultaneously.
- the wheel 38 is installed outside the reception device 15.
- the latter therefore comprises an orifice allowing the rod 28 to pass through the casing 16.
- the opening of the clamps is not limited to this single embodiment.
- the plurality of pairs of fingers can cooperate with the pair of drive ends to separate them from each other (not shown in the figures).
- the pair of fingers is installed in contact along the hollow of the concave surface.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24736447.4A EP4736266A1 (fr) | 2023-06-30 | 2024-06-26 | Dispositif d'accueil de cellules électrochimiques pour former un module de batterie |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2306934 | 2023-06-30 | ||
| FR2306934A FR3150649A1 (fr) | 2023-06-30 | 2023-06-30 | Dispositif d’accueil de cellules électrochimiques pour former un module de batterie |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2025003183A1 true WO2025003183A1 (fr) | 2025-01-02 |
Family
ID=88290597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/067893 Ceased WO2025003183A1 (fr) | 2023-06-30 | 2024-06-26 | Dispositif d'accueil de cellules électrochimiques pour former un module de batterie |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4736266A1 (fr) |
| FR (1) | FR3150649A1 (fr) |
| WO (1) | WO2025003183A1 (fr) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120156537A1 (en) * | 2009-01-19 | 2012-06-21 | Li-Tec Battery Gmbh | Electrochemical energy storage device |
| WO2017030312A1 (fr) * | 2015-08-18 | 2017-02-23 | 주식회사 엘지화학 | Dispositif de connexion de fil de cellule et module de batterie le comprenant |
-
2023
- 2023-06-30 FR FR2306934A patent/FR3150649A1/fr active Pending
-
2024
- 2024-06-26 WO PCT/EP2024/067893 patent/WO2025003183A1/fr not_active Ceased
- 2024-06-26 EP EP24736447.4A patent/EP4736266A1/fr active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120156537A1 (en) * | 2009-01-19 | 2012-06-21 | Li-Tec Battery Gmbh | Electrochemical energy storage device |
| WO2017030312A1 (fr) * | 2015-08-18 | 2017-02-23 | 주식회사 엘지화학 | Dispositif de connexion de fil de cellule et module de batterie le comprenant |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3150649A1 (fr) | 2025-01-03 |
| EP4736266A1 (fr) | 2026-05-06 |
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