WO2024100341A1 - Circuit caloporteur de cellules de batterie intégré au socle de ladite batterie et procédé de fabrication associé - Google Patents
Circuit caloporteur de cellules de batterie intégré au socle de ladite batterie et procédé de fabrication associé Download PDFInfo
- Publication number
- WO2024100341A1 WO2024100341A1 PCT/FR2023/051717 FR2023051717W WO2024100341A1 WO 2024100341 A1 WO2024100341 A1 WO 2024100341A1 FR 2023051717 W FR2023051717 W FR 2023051717W WO 2024100341 A1 WO2024100341 A1 WO 2024100341A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat transfer
- transfer circuit
- base
- conduit
- battery
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
- H01M10/6565—Gases with forced flow, e.g. by blowers with recirculation or U-turn in the flow path, i.e. back and forth
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- TITLE Battery cell heat transfer circuit integrated into the base of said battery and associated manufacturing process.
- the technical field of the invention is the protection of multiple-cell batteries, and more particularly, the protection of such batteries against thermal runaway.
- the electrochemical cells of a battery are generally assembled inside a casing, in contact with a heat transfer circuit, in which a heat transfer liquid circulates.
- Such a covering generally comprises a tray or base and a bell cooperating with the base in order to delimit a closed volume inside which the battery cells are arranged.
- the heat transfer circuit is in contact with the base and is in the form of a set of welded tubes, generally connected in parallel. When connected in this way, the flow of heat transfer liquid is approximately equal through each tube. On the other hand, such a configuration has the effect of creating a thermal gradient between the input and output of the circuit.
- not all cells can be cooled in parallel.
- the heat transfer circuit then includes tubes connected in parallel and tubes connected in series. Combined with the temperature gradient of the parallel zones, this has the effect of not subjecting all the cells to a heat transfer liquid at the same temperature. Some cells then have a higher temperature than the other cells. The same is true when a large number of cells are cooled by a parallel circuit, the cells near the inlet of the heat transfer circuit have a lower temperature than those near the outlet.
- the heat transfer circuit is generally independent of the base so as to facilitate manufacturing, control and maintenance.
- This thermal interface is generally produced in the form of a thermal pad, which has an impact on the mass and cost of the assembly.
- the subject of the invention is a battery support comprising a base and a heat transfer circuit, the heat transfer circuit comprising a first conduit and a second conduit, a first end of the first conduit allowing the admission of a heat transfer liquid, a first end of the second conduit allowing the outlet of said heat transfer liquid, the first conduit and the second conduit being connected together by their second end.
- the first conduit and the second conduit are delimited on the one hand by the base and on the other hand by a set of walls, the first conduit and the second conduit sharing a common wall.
- the section of the walls of the heat transfer circuit can have an E shape.
- the section of the walls of the heat transfer circuit can have a W shape.
- the invention also relates to a battery comprising at least one cell arranged on a battery support as described above, the cells being arranged on one side of the base, the heat transfer circuit being arranged on the other side of the base so as to extend opposite each cell.
- the heat transfer liquid can be chosen from a refrigerant, brine, or a gas, in particular air.
- Another object of the invention is a method of manufacturing a battery support as described above, comprising the following steps:
- An object of the invention is a method of manufacturing a battery support as described above, in which the heat transfer circuit is produced by additive manufacturing directly on the base.
- FIG. 1 illustrates a first embodiment of a heat transfer circuit
- FIG. 1 illustrates a sectional view of the heat transfer circuit
- FIG. 3 illustrates a sectional view of the heat transfer circuit section
- FIG. 4 illustrates a tool for holding the heat transfer circuit on the base during welding
- FIG. 5 illustrates the main stages of a process for manufacturing a heat transfer circuit according to the first embodiment
- FIG. 6 illustrates a sectional view of the section of the heat transfer circuit according to a second embodiment
- FIG. 7 illustrates the second embodiment of a heat transfer circuit
- a battery casing according to the invention comprises a bell and a base to the surface of which the heat transfer circuit is welded.
- Figure [Fig 1] illustrates the base 1 and the heat transfer circuit 2.
- the heat transfer circuit comprises a first conduit 2a in which the liquid admitted into the circuit circulates and a second conduit 2b in which the liquid leaving the heat transfer circuit 2 circulates.
- the admission of the heat transfer liquid into the first conduit 2a is done through its first end .
- the exit of the heat transfer liquid from the second conduit 2b is also done through its first end.
- the heat transfer liquid is chosen from a refrigerant liquid, brine, or even a gas such as air.
- the two conduits are connected together by their second end.
- Figure [Fig 2] illustrates a sectional view along a plane passing through a central axis of each conduit.
- the inventors had the idea of removing the wall of the heat transfer circuit 2 in contact with the base. It is thus possible to save on the wall of the heat transfer circuit at the interface with the base 1.
- the mass of the assembly is thus reduced as is the thermal inertia of the assembly, facilitating heat transfer .
- Figure [Fig 3] illustrates a sectional view normal to the axes of each conduit.
- the section plane A-A' of Figure [Fig 2] is illustrated, as is the base 1, the first conduit 2a and the second conduit 2b.
- the heat transfer circuit 2 comprises an open face and an E shape.
- the conduits 2a, 2b are thus only capable of receiving the heat transfer liquid once secured to the base 1.
- the E shape of the heat transfer circuit corresponds to the needs in terms of thermal management of the cells, particularly in terms of heat transfer. Knowing the heat capacity of the heat transfer liquid used, and the quantity of thermal energy to be dissipated, we can determine the necessary flow rate of heat transfer liquid. Knowing the capacity of the on-board circulation pumps, we can determine the necessary section of the heat transfer circuit pipes.
- the section of the heat transfer circuit can be modified, particularly in terms of aspect ratio, to take into account the structural constraints of the conduits. In particular, we can adapt the height of the coil according to the resistance in bending or torsion.
- the first conduit in which the admitted liquid circulates and the second conduit in which the outgoing liquid circulates are both in contact with the same components, in particular with the same cells.
- this has the advantage of homogenization of the temperature between the heat transfer liquid admitted and the heat transfer liquid leaving so that the temperature gradient is reduced.
- the removal of the wall of the conduits in contact with the base makes it possible to avoid a double interface due to the contact of the wall of the led with the base. Thermal inertia is reduced which further reduces the temperature gradient.
- the heat transfer circuit is designed so as to be in contact with the electrical connectors of the battery.
- the E-section of the heat transfer circuit highlights the limited accessibility of the central wall of the heat transfer circuit 2 during welding on the base 1.
- the heat transfer circuit is welded to the base by laser welding.
- Such welding is carried out by transparency, so that the limited accessibility of the central wall is not problematic. It also has the advantage of not requiring the addition of metal, and therefore the addition of mass.
- one of the main constraints of laser welding lies in the distance between the parts to be welded, in this case between the walls and the base. This distance must be less than 0.2 mm with current techniques.
- FIG 4 illustrates this holding tool 3, which comprises a metal plate 4 provided with a first set 5 of blind tapped holes arranged opposite the base 1 and a second set 6 of through-tapped holes arranged au- above the heat transfer circuit 2.
- a set of holes 7 is made in the base 1, facing the first set 5 of blind tapped holes.
- the tool and the base are then joined together via spacers 8 adjusted to the height of the heat transfer circuit 2 and screws 9.
- sets of threaded rod and nut pairs are substituted for screws 9.
- the second set of holes 6 is provided with other screws 10, the screwing of which makes it possible to apply pressure on the heat transfer circuit 2.
- This pressure makes it possible to reduce the distance between the walls of the heat transfer circuit 2 and the base 1, below of the limit distance for laser welding.
- the manufacturing process is illustrated in Figure [Fig 5]. It comprises a first step 101 during which the heat transfer circuit 2 is placed on the base 1. The holding tool 3 is then fixed to the base 1 so that it extends above the heat transfer circuit 2, the screw 10 being in contact with the heat transfer circuit 2. The pressure on the heat transfer circuit 2 is then adjusted by adjusting the screwing of the screws 10 so as to reduce the distance between the walls of the heat transfer circuit 2 and the base 1.
- each tapped hole 7 made in the base 1 and allowing the holding tool to be fixed is then provided with a shouldered washer or a metal pad which is also welded by laser welding.
- the choice of the arrangement and the number of holes of the first set 5 depends, among other things, on the length of the heat transfer circuit 2, its shape and the deformation of the base 1.
- titanium which is a material with very good mechanical strength.
- the production of the heat transfer circuit in titanium is particularly interesting due to the mechanical constraints it undergoes during cooling or heating of the battery cells, and due to the stiffness imparted by the heat transfer circuit 2 to the base 1.
- titanium has a lower mass than stainless steel.
- the heat transfer circuit is produced by additive manufacturing directly on the base.
- the E shape is replaced by a W shape in which each conduit 2a, 2b has a triangle shape.
- Figure [Fig 6] illustrates the W shape of the heat transfer circuit 2 while figure [Fig 7] is a bird's eye view of the heat transfer circuit 2 formed on the base 1 by additive manufacturing.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19/126,502 US20260011807A1 (en) | 2022-11-07 | 2023-10-31 | Battery cell heat transfer circuit incorporated into the base of the battery and associated manufacturing method |
| CN202380077597.7A CN120239920A (zh) | 2022-11-07 | 2023-10-31 | 并入电池底座的电池电芯传热回路及其相关制造方法 |
| EP23813014.0A EP4616470A1 (fr) | 2022-11-07 | 2023-10-31 | Circuit caloporteur de cellules de batterie intégré au socle de ladite batterie et procédé de fabrication associé |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2211554A FR3141809B1 (fr) | 2022-11-07 | 2022-11-07 | Circuit caloporteur de cellules de batterie intégré au socle de ladite batterie et procédé de fabrication associé |
| FRFR2211554 | 2022-11-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024100341A1 true WO2024100341A1 (fr) | 2024-05-16 |
Family
ID=84887289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2023/051717 Ceased WO2024100341A1 (fr) | 2022-11-07 | 2023-10-31 | Circuit caloporteur de cellules de batterie intégré au socle de ladite batterie et procédé de fabrication associé |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20260011807A1 (fr) |
| EP (1) | EP4616470A1 (fr) |
| CN (1) | CN120239920A (fr) |
| FR (1) | FR3141809B1 (fr) |
| WO (1) | WO2024100341A1 (fr) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2851991A1 (fr) * | 2012-05-17 | 2015-03-25 | Hitachi Automotive Systems, Ltd. | Module accumulateur |
| DE102018222212A1 (de) * | 2018-12-18 | 2020-06-18 | Elringklinger Ag | Temperierelement, Batteriespeichervorrichtung, Verfahren zum Herstellen eines Temperierelements und Verfahren zum Herstellen einer Batteriespeichervorrichtung |
| EP3972034A1 (fr) * | 2020-04-22 | 2022-03-23 | LG Energy Solution Ltd. | Module de batterie et bloc-batterie le comprenant |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017002325A1 (fr) * | 2015-06-30 | 2017-01-05 | 三洋電機株式会社 | Dispositif source d'énergie |
-
2022
- 2022-11-07 FR FR2211554A patent/FR3141809B1/fr active Active
-
2023
- 2023-10-31 WO PCT/FR2023/051717 patent/WO2024100341A1/fr not_active Ceased
- 2023-10-31 EP EP23813014.0A patent/EP4616470A1/fr active Pending
- 2023-10-31 US US19/126,502 patent/US20260011807A1/en active Pending
- 2023-10-31 CN CN202380077597.7A patent/CN120239920A/zh active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2851991A1 (fr) * | 2012-05-17 | 2015-03-25 | Hitachi Automotive Systems, Ltd. | Module accumulateur |
| DE102018222212A1 (de) * | 2018-12-18 | 2020-06-18 | Elringklinger Ag | Temperierelement, Batteriespeichervorrichtung, Verfahren zum Herstellen eines Temperierelements und Verfahren zum Herstellen einer Batteriespeichervorrichtung |
| EP3972034A1 (fr) * | 2020-04-22 | 2022-03-23 | LG Energy Solution Ltd. | Module de batterie et bloc-batterie le comprenant |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4616470A1 (fr) | 2025-09-17 |
| FR3141809B1 (fr) | 2025-06-06 |
| CN120239920A (zh) | 2025-07-01 |
| US20260011807A1 (en) | 2026-01-08 |
| FR3141809A1 (fr) | 2024-05-10 |
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