EP4229710A1 - Pack batterie comprenant des moyens d'évacuation de gaz - Google Patents
Pack batterie comprenant des moyens d'évacuation de gazInfo
- Publication number
- EP4229710A1 EP4229710A1 EP21790208.9A EP21790208A EP4229710A1 EP 4229710 A1 EP4229710 A1 EP 4229710A1 EP 21790208 A EP21790208 A EP 21790208A EP 4229710 A1 EP4229710 A1 EP 4229710A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- storage device
- energy storage
- module
- modules
- opening
- 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.)
- Pending
Links
- 238000004146 energy storage Methods 0.000 claims abstract description 40
- 239000007789 gas Substances 0.000 claims abstract description 36
- 239000004020 conductor Substances 0.000 claims description 23
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract 1
- 238000010891 electric arc Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 241000826860 Trapezium Species 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/317—Re-sealable arrangements
- H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
-
- 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- 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
- H01M50/202—Casings or frames around the primary casing of a single cell or a single battery
-
- 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
-
- 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
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/222—Inorganic material
- H01M50/224—Metals
-
- 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
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/229—Composite material consisting of a mixture of organic and inorganic materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- 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
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
-
- 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/317—Re-sealable arrangements
- H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
- H01M50/333—Spring-loaded vent valves
-
- 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
-
- 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
- H01M50/367—Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/20—Pressure-sensitive devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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 pack including gas evacuation means
- the invention relates to an energy storage device or battery pack comprising electrochemical cells and gas evacuation means formed following a malfunction of at least one electrochemical cell.
- the invention also relates to a motor vehicle comprising such an energy storage device.
- Electric vehicles and hybrid vehicles include an energy storage device comprising electrochemical cells for supplying electrical energy to an electric motor.
- electrochemical cells are generally assembled in series or in parallel in an electrochemical module.
- the electrochemical modules are supported by a structure and interconnected by electrical conductors, commonly called "busbar". In operation, significant electrical potential differences can form between the different electrical conductors. The electrical conductors are therefore sufficiently spaced to prevent the formation of an electric arc.
- the electrochemical cells are liable to undergo a failure such as, for example, a thermal runaway. Gases laden with metallic particles can then be released from the module comprising the defective electrochemical cell. The presence of these gases between two electrical conductors with a significant potential difference can lead to the formation of an electric arc.
- Such an electric arc can then form holes in the structure of the energy storage device, for example in a cover of the device energy storage. These holes can then form a privileged place for supplying oxygen from the outside. The high temperatures inside the energy storage device combined with these electric arcs and an oxygen supply can then lead to the appearance of a fire.
- Document EP2654100 discloses an energy storage device comprising a specific internal pipe configured to guide gases outwards. Such a storage device comprises many elements assembled together. It is complex to manufacture, heavy and bulky.
- the object of the invention is to provide an energy storage device remedying the above drawbacks and improving the energy storage devices known from the prior art.
- an object of the invention is an energy storage device that is both simple to manufacture and makes it possible to reduce any risk of electric arc formation following the failure of an electrochemical cell.
- the invention relates to an energy storage device comprising a set of electrochemical modules and a casing enveloping said modules, the casing comprising a double-walled structure, each module comprising electrochemical cells and a casing enveloping said electrochemical cells, the envelope being provided with at least one weak zone suitable for letting out gases contained inside the module, said structure comprising an internal wall, an external wall and at least one chamber defined between the internal wall and the external wall, the internal wall being provided with a set of openings positioned opposite the at least one weak zone of each module, the external wall being provided with at least one evacuation opening.
- Said structure can be an extruded structure of material, in particular extruded of aluminum.
- the at least one weak zone formed in the envelope of each module can be an opening, in particular a circular opening.
- Each opening of the internal walls of said structure may have a surface strictly greater than the surface of the opening of the casing positioned opposite it.
- the at least one weak zone may be arranged along a first side of each module, and the energy storage device may comprise electrical conductors connecting the modules together, the electrical conductors being arranged along a second side of each module, substantially opposite the first side, in particular the electrical conductors being arranged substantially towards the center of the energy storage device.
- the set of electrochemical modules may comprise two parallel rows of electrochemical modules, the energy storage device comprising electrical conductors arranged substantially at an interface zone between the two parallel rows.
- each weak zone and the opening of the internal wall opposite it can be less than or equal to 50mm.
- Said at least one chamber can form at least locally a gas evacuation chamber towards the at least one evacuation opening.
- the energy storage device may comprise at least two distinct chambers defined between the internal wall and the external wall of the structure, the at least two chambers forming at least locally two distinct gas evacuation chambers towards at least two openings separate evacuations.
- the energy storage device may comprise at least one valve configured to gradually open in the event of overpressure in said at least one chamber, the at least one valve being arranged at the level of the at least one evacuation opening .
- the energy storage device may comprise crosspieces separating adjacent electrochemical modules, the crosspieces being fixed to said structure.
- the invention also relates to a motor vehicle comprising an energy storage device as defined previously.
- FIG. 1 Figure 1 is a schematic view of a motor vehicle equipped with an energy storage device according to one embodiment of the invention.
- Figure 2 is an isometric perspective view of a double-wall structure of the energy storage device.
- Figure 3 is a perspective view of an electrochemical module of the energy storage device.
- Figure 4 is a sectional view of the structure of Figure 2.
- Figure 5 is a sectional view of a valve of the energy storage device.
- FIG. 1 schematically illustrates a motor vehicle 1 according to one embodiment of the invention.
- the vehicle 1 can for example be an electric vehicle or a hybrid vehicle.
- the vehicle 1 comprises an energy storage device 2 capable of storing energy in electrochemical form to supply electricity to an electric motor of the vehicle.
- the energy storage device 2 which could also be called “battery pack” or for convenience “device 2"
- the energy storage device 2 comprises a set of electrochemical modules 3 and a casing enveloping the modules 3.
- the casing forms a closed envelope surrounding all of the modules 3.
- Each module 3 comprises electrochemical cells, or accumulators, and an envelope surrounding these cells.
- the electrochemical cells can, for example, be of the lithium-ion type or of any other type of cell capable of storing energy in electrochemical form.
- the device 2 comprises twelve modules 3. As a variant, this number could be arbitrary.
- the modules 3 can be arranged in two rows comprising an equal number of modules, ie two rows of six modules according to the embodiment shown. Modules can be positioned next to each other along a horizontal plane when the vehicle 1 rests on horizontal ground.
- the casing in which the modules 3 are contained, comprises a structure 4 with double walls.
- the structure 4 extends laterally around the set of modules 3. It may comprise a polygonal shape, generally resembling the shape of a rectangle or a trapezium.
- the structure 4 can mainly have the function of supporting all of the modules. It therefore includes robustness and rigidity adapted to support the weight of the modules.
- the structure 4 constitutes a lateral protection of the various modules.
- the housing also includes a lower cover
- the device 2 can be fixed, via the casing, to a lower part of a body of the vehicle, in particular via its structure 4.
- the device 2 also comprises crosspieces 6 separating adjacent electrochemical modules.
- the crosspieces 6 are fixed to the structure 4 and participate in maintaining the various modules. In other words, the sleepers
- the crosspieces 6 form compartments inside which the modules 3 are arranged.
- the crosspieces 6 can extend parallel to each other between two opposite sides of the structure 4. They can extend parallel to a transverse axis of the vehicle.
- the modules 3 are electrically interconnected by electrical conductors 7, in particular busbars.
- the electrical conductors 7 may for example be in the form of metal plates or bars and are able to convey high electrical currents. intensity.
- Metallic conductors electrically connect two adjacent modules. They are arranged substantially towards the center of the storage device, that is to say substantially along a center line X separating the device 2 into two equal halves. In other words, the metal conductors are arranged substantially at an interface zone Zx defined between the two parallel rows of modules.
- the centerline X may be substantially parallel to a longitudinal axis of the vehicle.
- FIG. 3 illustrates an electrochemical module 3 according to one embodiment of the invention. It comprises an envelope 31 of generally parallelepiped shape which covers the electrochemical cells.
- the module 3 can for example have dimensions of the order of 200mm by 200mm by 400mm.
- the casing 31 can form a sealed protection for the electrochemical cells of the module 3.
- the casing 31 can for example be a casing. It comprises a first side 32 facing the structure 4.
- the module 3 may comprise fastening means 33 in the form of vertical openings intended to cooperate with screws.
- the module 3 can be fixed integrally to the lower cover 5, itself supported by the structure 4 or to any other structural element fixed to the structure 4.
- the casing 31 further comprises two weak zones 34 arranged on the first face 32.
- the module could have a different number of weak zones: for example one, three, four or five weak zones, or even even more. These weak zones could possibly be positioned on different faces of the module 3.
- the weak zones 34 are capable of letting out the gases contained inside the electrochemical module. In other words, when one or more electrochemical cells contained in module 3 produces a release gas following a malfunction, gas can come out of the casing 31 via its weak zones 34.
- these weak zones 34 can be simple openings made in the casing, for example circular openings.
- the envelope 31 is not sealed and the openings constitute the only openings of the envelope.
- the weak zones could be zones of the casing that are more fragile and ready to break following a rise in pressure inside the casing.
- the weak zones could be produced by locally thinning the casing 31 or by precutting an opening over only part of the thickness of the casing. In this case, the envelopes could be sealed until the weak zones 34 break.
- the electrical conductor 7 associated with the module 3 can preferably be arranged along a second side 35 of the casing 31, opposite the first side 32. Thus the electrical conductor 7 can be moved away from the weak zones along the largest module lengths 3.
- Structure 4 is a double-walled structure. It comprises an internal wall 41, facing the various modules 3, an external wall 42 facing the outside of the device 2 and at least one chamber defined between the internal wall 41 and the external wall 42. More particularly, according to the mode of illustrated embodiment, the structure 4 comprises three chambers 43A, 43B and 43C positioned one above the other.
- the inner wall 41 is connected to the outer wall by four connecting walls 44.
- the number of chambers could be arbitrary, for example one bedroom or two bedrooms.
- the various chambers may be closed volumes which are distinct from each other.
- the structure 4 can be formed by an assembly of different profiled segments. These segments can advantageously be obtained by a material extrusion process, in particular aluminum.
- the inner wall 41 and the outer wall 42 can extend vertically substantially parallel to each other.
- the connecting walls 44 can extend substantially horizontally.
- a section of the structure 4 as seen in Figure 4 may have a generally rectangular shape. As a variant, the shape of this section could be different: for example square, triangular or trapezoidal.
- Brackets 8 can be attached to the outer wall 42 for fixing the lower cover 5.
- the internal wall 41 of the structure 4 comprises a set of openings 45 (shown schematically in FIGS. 1 and 2) positioned opposite the weak zones 34 of each module.
- opposite it is understood that the openings are positioned opposite the weak zones 34 of each module, at a short distance and without any intervening element.
- the weak zones 34 are spaced less than 50mm from the openings 45, in particular less than 40mm, preferably less than 30mm, or even approximately 20mm.
- a space between the openings 45 and the corresponding weak zones 34 may nevertheless turn out to be necessary, for example to allow easy assembly of the modules within the structure, to anticipate dimensional variations linked to manufacturing tolerances and/or thermal expansion.
- the openings 45 therefore allow the volume in which the modules 3 are housed to communicate with at least one of the chambers 43A, 43B, 43C.
- the outer wall 42 is equipped with at least one evacuation opening 46.
- two evacuation openings 46 are arranged on either side of the center line X.
- the evacuation openings 46 are not positioned vis-à-vis the openings 45 formed in the internal wall.
- at least one of the chambers 43A, 43B, 43C forms at least locally a gas evacuation chamber 47 from the openings 45 towards the evacuation openings 46.
- This evacuation chamber is not an added element to the device 2 but, on the contrary, is integrated directly into the structure 4 supporting the modules 3.
- all of the openings 45 can communicate with the same chamber 43A, 43B or 43C.
- the different openings 45 can communicate with separate chambers of the structure.
- evacuation openings 46 are of course provided for each chamber capable of receiving gases. It is thus possible to obtain a differentiated management of different gas flows and in particular to limit the risk that a gas penetrating inside a chamber through a first opening 45 emerges in the volume containing the modules through a second opening 45.
- the evacuation openings 46 can be separated from the openings 45 formed in the internal wall by a distance strictly greater than the distance separating the weak zones 34 from the openings 45.
- this distance can be at least 60 mm, preferably at least 70mm, or even at least 80mm.
- the device 2 also comprises valves 9, arranged at the level of each of the evacuation openings 46, and configured to open progressively in the event of overpressure in the chamber with which it communicates.
- These valves may comprise an elastic element such as a spring. They can be calibrated so as to open gradually when the gas pressure in the corresponding chamber becomes greater than or equal to a given threshold.
- the housing can be hermetically sealed, that is to say that gases cannot escape from the housing until their pressure has reached the opening pressure of the valves.
- the openings constituting the weak zones 34 have a surface strictly smaller than the surface of the openings 45 and strictly smaller than a passage surface of the valves 9.
- the passage surface of the valves 9 can be between the surface of the weak zones 34 and the surface of the openings 45.
- an opening constituting a weak zone 34 can comprise a surface comprised between 300mm2 and 400mm2 inclusive.
- An opening 45 can comprise a surface comprised between 500mm2 and 700mm2 inclusive.
- the passage opening of the valves 9 can be between 400 and 500 mm2 inclusive.
- the structure 4 can be manufactured by assembling extruded aluminum segments in which the openings 45 and 46 are provided. These openings can be made by simple drillings.
- the dimensions proposed for the openings 45, 46 are both small enough to little affect the rigidity of the structure 4 and large enough to efficiently evacuate gases.
- the valves 9 can simply be fitted into the corresponding openings 46.
- the modules 3 can be positioned inside the structure 4 between the crosspieces 6. The modules 3 are then fixed directly or indirectly to the structure 4 so that the weak zones 34 take position opposite the openings 45.
- electric currents can flow through the electric conductors 7.
- Significant potential differences can be established between neighboring electric conductors. For example, this potential difference (shown by an arrow F1 in Figure 1) can reach 400V.
- the electrical conductors 7 are nevertheless sufficiently spaced to prevent the formation of an electric arc under normal operating conditions.
- a gas (illustrated by the reference 10 in FIG. 1) can form in the module.
- the gas increases the pressure inside the casing 31 of the module and ends up escaping out of the module 3 passing through one of the weak zones 34.
- this weak zone is positioned at a short distance from a opening 35, the gas goes naturally inside one of the chambers 43A, 43B, 43C.
- the surface of the opening 45 is strictly greater than the surface of the weak zone so that all or almost all of the gas flow can pass from the cell 3 to the chamber formed in the structure 4.
- the pressure of gas increases inside the chamber until it reaches a sufficient value allowing the opening of the valve 9. The gas then escapes out of the structure 4 via the valve 9.
- the presence of a valve prevents fresh air from entering inside the device 2 by following the reverse path of the gases. This avoids bringing oxygen inside the device, which could lead to a fire.
- the walls of the structure 4 have a high thermal inertia and make it possible to cool the gases at the same time as they evacuate them. This reduces the risk of self-ignition of gases leaving the valve.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Battery Mounting, Suspending (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2010499A FR3115163B1 (fr) | 2020-10-14 | 2020-10-14 | Pack batterie comprenant des moyens d'évacuation de gaz |
| PCT/EP2021/078057 WO2022078962A1 (fr) | 2020-10-14 | 2021-10-11 | Pack batterie comprenant des moyens d'évacuation de gaz |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4229710A1 true EP4229710A1 (fr) | 2023-08-23 |
Family
ID=74045752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21790208.9A Pending EP4229710A1 (fr) | 2020-10-14 | 2021-10-11 | Pack batterie comprenant des moyens d'évacuation de gaz |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20230411775A1 (fr) |
| EP (1) | EP4229710A1 (fr) |
| JP (1) | JP2023545967A (fr) |
| KR (1) | KR20230088374A (fr) |
| CN (1) | CN116368670A (fr) |
| FR (1) | FR3115163B1 (fr) |
| WO (1) | WO2022078962A1 (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20240347846A1 (en) * | 2022-05-27 | 2024-10-17 | Lg Energy Solution, Ltd. | Battery pack and device including the same |
| EP4376197B1 (fr) * | 2022-07-06 | 2026-04-15 | Lg Energy Solution, Ltd. | Bloc-batterie |
| JP2024035346A (ja) * | 2022-09-02 | 2024-03-14 | 株式会社Aescジャパン | 電池パック |
| JP2024035347A (ja) * | 2022-09-02 | 2024-03-14 | 株式会社Aescジャパン | 電池パック |
| WO2025141665A1 (fr) * | 2023-12-25 | 2025-07-03 | 日産自動車株式会社 | Structure de boîtier de batterie |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4399675B2 (ja) * | 2007-10-25 | 2010-01-20 | 三菱アルミニウム株式会社 | 電気自動車用バッテリートレイ |
| US8268469B2 (en) * | 2009-04-22 | 2012-09-18 | Tesla Motors, Inc. | Battery pack gas exhaust system |
| WO2012081137A1 (fr) | 2010-12-13 | 2012-06-21 | パナソニック株式会社 | Bloc-piles |
| KR102030726B1 (ko) * | 2015-10-15 | 2019-10-10 | 주식회사 엘지화학 | 배터리 팩 |
| CN111384328A (zh) * | 2018-12-29 | 2020-07-07 | 比亚迪股份有限公司 | 电池托盘、动力电池包及车辆 |
-
2020
- 2020-10-14 FR FR2010499A patent/FR3115163B1/fr active Active
-
2021
- 2021-10-11 CN CN202180069849.2A patent/CN116368670A/zh active Pending
- 2021-10-11 WO PCT/EP2021/078057 patent/WO2022078962A1/fr not_active Ceased
- 2021-10-11 US US18/248,574 patent/US20230411775A1/en active Pending
- 2021-10-11 KR KR1020237014080A patent/KR20230088374A/ko active Pending
- 2021-10-11 EP EP21790208.9A patent/EP4229710A1/fr active Pending
- 2021-10-11 JP JP2023520038A patent/JP2023545967A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3115163B1 (fr) | 2023-04-21 |
| FR3115163A1 (fr) | 2022-04-15 |
| KR20230088374A (ko) | 2023-06-19 |
| CN116368670A (zh) | 2023-06-30 |
| JP2023545967A (ja) | 2023-11-01 |
| US20230411775A1 (en) | 2023-12-21 |
| WO2022078962A1 (fr) | 2022-04-21 |
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Owner name: NISSAN MOTOR CO., LTD. Owner name: AMPERE SAS |