WO2023218242A2 - Dispositif d'egalisation de pression pour un boîtier de batterie - Google Patents
Dispositif d'egalisation de pression pour un boîtier de batterie Download PDFInfo
- Publication number
- WO2023218242A2 WO2023218242A2 PCT/IB2023/000265 IB2023000265W WO2023218242A2 WO 2023218242 A2 WO2023218242 A2 WO 2023218242A2 IB 2023000265 W IB2023000265 W IB 2023000265W WO 2023218242 A2 WO2023218242 A2 WO 2023218242A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cage
- cover
- pressure
- membrane
- battery case
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B39/00—Packaging or storage of ammunition or explosive charges; Safety features thereof; Cartridge belts or bags
- F42B39/20—Packages or ammunition having valves for pressure-equalising; Packages or ammunition having plugs for pressure release, e.g. meltable ; Blow-out panels; Venting arrangements
-
- 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
- H01M50/394—Gas-pervious parts or elements
-
- 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
- H01M50/308—Detachable arrangements, e.g. detachable vent plugs or plug systems
-
- 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
- H01M50/317—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
-
- 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 Pressure equalization device for a battery box
- the invention relates to the field of pressure equalization devices making it possible to compensate for the variation in pressure inside a battery and to systematically release the pressure in the event of overpressure (for example, by means of a degassing device ).
- a pressure equalization device for a battery box is provided.
- the device may include a cage.
- the cage can describe a fluid passage.
- the device may include a cover, which can be mounted on the cage.
- the cover may be movable, for example between an open configuration, in which air can escape, in use, out of the housing, and a closed configuration, in which the housing is sealed.
- a pressure equalizing device for a housing, the device including a cage describing a fluid passage and a cover mounted on the cage, wherein the cover is movable, in use, between an open configuration, in in which air can escape, and a closed configuration, in which the housing is sealed.
- the device may include a membrane, which may cover the fluid passage, for example to equalize the pressure inside the housing with the ambient pressure outside the housing.
- the invention also relates to a pressure equalizing device for a housing, the device comprising a cage describing a fluid passage, a cover mounted on the cage and a membrane covering the fluid passage to equalize the pressure within the housing with ambient pressure outside the housing, wherein the cover is movable, in use, between an open configuration, in which air can escape, and a closed configuration, in which the housing is sealed.
- the lid can be rotated between open and closed configurations or positions.
- At least one of the cover and the cage may include a formation, for example an inclined, helical or screw-shaped formation.
- the formation may cooperate with a formation on the other of the cover and the cage to cause the cover to translate relative to the cage when rotated between the open and closed configurations or positions.
- the cover can be screwed between open and closed configurations or positions.
- the device may include sealing means on one or both of the cover and/or the cage, for example which ensure the sealing of the housing when the cover is in the closed configuration or position.
- the cover may include one or more windows.
- the cage may include one or more windows.
- the or each window of the cover may be aligned with the corresponding window or windows of the cage, for example when the cover is in the open position.
- the or each window of the cover may be misaligned or offset relative to the corresponding window or windows of the cage, for example when the cover is in the closed position.
- the device may include a seal, for example example a window seal, which can be configured to seal fluid communication between windows, for example when the cover is in the closed position.
- the device may include a valve element, for example a flexible umbrella.
- the valve element can cover the fluid passage.
- the valve element may include a hole, for example through its thickness.
- the valve member may include a diaphragm or the diaphragm, which may be attached to the valve member and/or may cover the hole.
- the valve element diaphragm may be configured to equalize, in use, the pressure inside the battery case with the ambient pressure outside the battery case.
- the valve member may be configured to reversibly move or deform, for example at a predetermined pressure difference between the interior and exterior of the battery case, to prevent overpressure within the battery case. battery.
- the invention provides a pressure equalization device that is both compact and allows a significant degassing flow.
- the membrane may be gas permeable and liquid impermeable, for example to allow air to pass through it to equalize the pressure inside the battery case with the ambient pressure outside the battery case. battery.
- the membrane can be integrated or overmolded into the valve element. Furthermore, all holes can be covered with a membrane or each hole can be covered with a respective membrane.
- the membrane may be configured to move or deform reversibly, for example to equalize the pressure inside the battery case with the ambient pressure outside the battery case.
- the valve element may include a disc.
- the valve member or disc may include a canopy. At least part of the hole may be next to the disc or canopy. At least part of the hole can surround at least partially the disc or canopy. Alternatively, the hole may extend through the disc or canopy.
- the disc or canopy may be rigid or flexible.
- the disc or canopy may be flat or curved. The disc or canopy may be compressed or pushed to a closed position, for example in which it covers the fluid passage.
- the cage may include a central support.
- the fluid passage may be one of two or more fluid passages around the central support.
- the valve element may include a flexible umbrella valve element.
- the valve element may include a stem, which may be connected to the central support.
- the disk can be pushed by a pressure means, such as a spring, towards a closed position, for example in which it covers the passage of the fluid.
- the disc or the cage may comprise a seal or a sealing means, for example a seal or a peripheral sealing means.
- the seal or sealing means may extend over the periphery of the fluid passage(s) or the disc.
- the seal or the sealing means can be configured to seal and/or to create a seal between the disc and the cage, for example when the disc is in the closed position.
- the disc or canopy may be configured to reversibly move or deform at a predetermined pressure difference between the interior and exterior of the battery case to prevent overpressure within the battery case.
- the canopy may extend radially from the stem, for example to cover fluid passages.
- the hole is one of two or more holes through the disc or canopy.
- Each of the holes can be covered by the membrane or a respective membrane.
- the cage may include a lip and/or a seal. The seal may be spaced from the lip. The seal and lip may be configured to capture, in use, a wall of the battery case therebetween, for example to seal the cage in a hole in the battery case.
- the cage may include a bayonet connection.
- the bayonet connection may have two or more flanges, each of which may describe part of a lip.
- the cage may include a valve seat.
- the valve member or disc or canopy of the valve member may engage, for example in a sealed manner, against the valve seat when the disc or canopy covers the fluid passages.
- the cage may include a sealing part.
- the sealing part may include the gasket and/or the valve seat.
- the seal can be connected to the valve seat, for example by one or more bridging columns.
- the disc or canopy may include one or more seal lips, which may be configured to engage the valve seat.
- the one or more sealing lips may include a pair of sealing lips, which may be spaced apart from each other, for example the one or more sealing lips may include a pair of spaced apart sealing lips.
- the seal and/or the valve seat and/or the sealed part can be formed integrally with the cage, for example by an overmolding process.
- the seal can be located on a first side, for example a lower side, of the cage.
- the valve seat may be located on a second side, for example an upper side, of the cage, which may be opposite the first side. Bridging columns may extend across the cage.
- the pressure means which pushes the disc towards the closed position can be captive between the disc and the cover.
- the disc and/or cover may include a connector, for example to connect to one end of the spring.
- the disc may include a projection, which may be received by one end of the means of pressure.
- the cover may include a housing or a socket, for example in which the other end of the pressure means can be received.
- the housing or sleeve of the cover may surround at least a portion of the disc projection.
- the cover may comprise a projection, which can be received by one end of the pressure means, and/or the disc may comprise a housing or a socket, for example in which the other end of the pressure means can be received and/or the housing or socket of the disc can surround at least part of the projection of the cover.
- Figure 1 illustrates a pressure equalization device for a battery box according to an example of the invention
- Figure 2 illustrates the device of Figure 1 without its upper cover
- Figure 3 illustrates a side view of the device of Figure 1 from the bottom, showing the engagement between the cover and the tubular wall;
- Figure 4 illustrates a perspective view of the device of Figure 1 from the bottom;
- Figure 5 illustrates a sectional view of the device of Figures 6 to 9;
- Figure 6 illustrates a sectional view of a valve element for a pressure equalization device for a battery box according to another example of the invention
- Figure 7 illustrates a pressure equalization device for a housing according to another example of the invention.
- Figure 8 illustrates a sectional view of the device of Figure 7.
- Figures 1 to 5 show a pressure equalization device 1 according to a first example, which is mounted on a wall of battery box 10 (part of which only is shown).
- the device 1 includes a primary shaft inside which the device 1 is mounted.
- the cage 2 comprises a tubular wall 20, a central support 21 connected to the tubular wall 20 by four radial walls 22. Fluid passages 23 are described between the radial walls 22, which ensure fluid communication between the interior of the wall of battery box 10 and the inside of the cage 2.
- Two radial flanges 24 project outwardly from the lower end of the tubular wall 20.
- the radial flanges 24 cooperate with two radial tabs 12 of the battery case wall 10 to provide a bayonet connection for securing the device 1 in the hole 11 of the battery box wall 10.
- a seal 25 depends on the tubular wall 20 and the radial flanges 24 together form a lip, so that the wall of the battery box 10 is captive between the lip and the seal 25.
- the cage 2 is therefore assembled in the hole 11, this hole being provided on the top of the battery, with a tower fixing system.
- a tower fixing system makes it possible to free up as much as possible the available space of the hole 11 and thus optimize the flow of the fluid through the fluid passages 23 of the cage 2.
- Such a profile in tower configuration to be fixed on the wall of the battery box 10 therefore makes it possible to obtain an optimum flow rate to evacuate the pressure inside the battery by clearing the hole 11 of the battery box as much as possible.
- the cover 4 surrounds the tubular wall 20 of the cage 2 and covers its open end.
- the cover 4 includes slots 40 which receive projections 26 on the tubular wall 20 to provide a connection between the cover 4 and the tubular wall 20.
- the tubular wall 20 includes a seal 27 around its open end and each of the slots 40 of the cover 4 comprises a helical segment 41. These helical segments 41 cooperate with the projections 26 of the tubular wall 20 to bring the seal 27 closer and further away from the cover 4 during rotation.
- the bayonet attachment includes only two flanges 24, but it also includes a pair of spring-loaded locking stops 28.
- the tabs 12 projecting into the hole 11 extend over most of the periphery, from so that the locking stops 28 snap into place between the tabs 12, thereby preventing rotation of the cage 2 when the cover 4 is rotated relative thereto.
- the valve element 3 comprises a stem 31 connected to the central support 21 and a canopy 32 extending radially from the stem 31, which covers the fluid passages 23.
- the valve element 3 is therefore an umbrella valve element 3
- the canopy 32 preferably has a convex shape, and is made of a flexible material in order to increase the closing tension. According to a variant, the canopy 32 has a flat shape.
- the umbrella valve element 3 can be made of damping material with a high-strength polytetrafluoroethylene (PTFE) membrane.
- PTFE polytetrafluoroethylene
- the canopy 32 includes four holes 33 passing through its thickness, which are covered with a membrane 34.
- the membrane 34 is permeable to gases and impermeable to liquids to allow air to pass through it in order to equalize the pressure inside of the battery box 10 with the ambient pressure outside the battery box 10.
- the membrane 34 is overmolded in the flexible umbrella valve element 3.
- the holes 33 can be covered by a respective membrane 34.
- the membrane 34 may be impermeable to air and may be designed to flex sufficiently to allow some pressure equalization.
- the air inside the battery case is equalized through the transmission of air through the membrane 34. If the pressure inside the battery case exceeds a predetermined threshold, the canopy 32 of the umbrella valve element 3 is forced to flex away from the fluid passages 23. Thus, high pressure air can be expelled from the battery case to avoid overpressure.
- the present invention thus makes it possible to carry out two pressure equalization functions.
- a first function called degassing function, in which the canopy 32 of the valve element 3 is deformed by the high pressure coming from the battery, which is the case in a thermal runaway situation (emergency) and in which it is necessary to degas over a very short period of time otherwise the battery will explode.
- a second function in which the membrane 34 is like a filter which compensates for variations in air pressure to maintain the pressure inside the battery equal to the external pressure.
- the membrane 34 can be a technical fabric (PTFE) impermeable to liquids but not to air. Therefore, the membrane is adapted to allow air to pass at reduced flow rates, thus enabling the ventilation function.
- PTFE technical fabric
- valve element 3 makes it possible to compensate for the pressure variation inside the battery and to systematically release the pressure (emergency degassing valve).
- the valve element 3 allows both to ventilate to balance the internal pressure equivalent to the external pressure, to degas for high internal pressure (emergency) in a short period of time, and to be waterproof against high water pressure from outside.
- FIG 6 we see a valve element 103 according to a second example, which is similar to the first example in that similar characteristics are marked by similar numbers incremented by 100.
- the valve element 103 according to this example differs from that of the first example in that the canopy 132 incorporates reinforcing ribs 135 surrounding the holes 133.
- the rod 131 comprises a conical end 131 a and a narrowed part 131 b.
- the valve element 103 is mounted on a cage 2 by inserting the tapered end 131a of the stem 131 into the central support 21 and forcing the stem 131 into the central support 21 until the tapered end 131 a protrudes from the other end and the central support 21 is captive in the narrowed part 131 b.
- Other arrangements are also possible.
- a pressure equalization device 201 according to another example is shown, which is similar to the first example in that similar characteristics are marked by like numbers incremented by 200.
- the device d The pressure equalization 201 according to this example differs from that of the first example in that the valve element 3 is omitted and simply replaced by a membrane 234.
- the membrane 234 acts as a filter which compensates for variations in air pressure to maintain the pressure inside the battery equal to the external pressure.
- the membrane 234 is preferably a technical fabric (PTFE) impermeable to liquids but not to air, but in other examples it may simply be deformable to equalize slight pressure variations.
- the equalization device 201 does not include the degassing function.
- the slots 240 include projections 243, 244 at each end of the helical segment 241.
- the projections 226 on the tubular wall 220 engage when the cover 204 is rotated to the closed position and to the open position.
- the projections 243, 244 of the slots 240 inhibit, but do not prevent, rotation of the cover 204 out of the closed and open positions.
- the cover is sealed against the seal 227 around the open end of the tubular wall 220. This prevents any ventilation, for example during a pressure test.
- FIG. 9 we see a pressure equalization device 301 according to another example, which is similar to the first example in that similar characteristics are marked by similar numbers incremented by 300.
- the device d The pressure equalization 301 according to this example differs from that of the first example in that the umbrella valve element 3 is replaced by a disc 303 and that the rotation of the cover 304 selectively aligns the windows 340, 329 through the cover 304 and the tubular wall 320.
- the disc 303 has holes 333 in its thickness, which are covered by an overmolded membrane 334, and a tubular wall 331 projects from the center of the disc 303.
- the cover 304 also includes a dependent tubular wall 343, which is aligned with the wall tubular 331 of the disc 303 and surrounds it.
- the device 301 comprises a spring 305, a first end of which surrounds the tubular wall 331 of the disc 303 and a second end of which is received in the tubular wall 343 of the cover 304.
- the spring 305 pushes the disc 303 towards a closed position in which it covers the fluid passage 323.
- a sealing material 306 is molded onto areas of the cage 302.
- the sealing material 306 includes the seal 325 which depends on the tubular wall 320 as well as a disc seal 360 surrounding the fluid passage 323, which engages with the disc 303 when in the closed position.
- the sealant material 306 also includes a window seal 361 surrounding the window 329 through the cage 302.
- fluid can pass from the battery case through fluid passage 323, through membrane 334 (or between cage 302 and disc 303 when moved) and exit through windows 329, 340 when the cover 304 is in the open position (illustrated in Figure 16).
- the window seal 361 seals the fluid communication during a 100% air leak test of the housing. battery.
- a pressure equalization device 401 according to another example, which is similar to the previous example in that similar characteristics are marked by similar numbers incremented by 100.
- the pressure equalization device 401 according to this example differs from that in the previous example in that the holes 433 pass through a base of the cage 402, while the diameter of the disc 403 corresponds to the diameter of the tubular wall 433, and the disc 403 has a peripheral seal 436 which sealingly engages with the base of the cage 402.
- the disc 403 is moved to reveal a central hole 423a through the base of cage 402.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US18/863,902 US20250309465A1 (en) | 2022-05-09 | 2023-05-05 | Pressure equalization device for a battery housing |
| CN202380043663.9A CN119318064A (zh) | 2022-05-09 | 2023-05-05 | 用于电池外壳的压力均衡装置 |
| DE112023002165.1T DE112023002165T5 (de) | 2022-05-09 | 2023-05-05 | Druckausgleichsvorrichtung für ein Batteriegehäuse |
Applications Claiming Priority (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22172381 | 2022-05-09 | ||
| EP22172381.0 | 2022-05-09 | ||
| EP22172803 | 2022-05-11 | ||
| EP22172803.3 | 2022-05-11 | ||
| EP22175084.7 | 2022-05-24 | ||
| EP22175084 | 2022-05-24 | ||
| EP23157922 | 2023-02-22 | ||
| EP23157922.8 | 2023-02-22 | ||
| EP23162552.6 | 2023-03-17 | ||
| EP23162552 | 2023-03-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2023218242A2 true WO2023218242A2 (fr) | 2023-11-16 |
| WO2023218242A3 WO2023218242A3 (fr) | 2024-06-06 |
Family
ID=87312151
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB2023/000265 Ceased WO2023218242A2 (fr) | 2022-05-09 | 2023-05-05 | Dispositif d'egalisation de pression pour un boîtier de batterie |
| PCT/IB2023/000254 Ceased WO2024175946A1 (fr) | 2022-05-09 | 2023-08-15 | Dispositif d'égalisation de pression pour un boîtier de batterie |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB2023/000254 Ceased WO2024175946A1 (fr) | 2022-05-09 | 2023-08-15 | Dispositif d'égalisation de pression pour un boîtier de batterie |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250309465A1 (fr) |
| CN (1) | CN119318064A (fr) |
| DE (1) | DE112023002165T5 (fr) |
| WO (2) | WO2023218242A2 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2026053175A1 (fr) * | 2024-09-06 | 2026-03-12 | Eaton Intelligent Power Limited | Structure de montage d'ensemble soupape |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3385584A1 (fr) | 2017-04-06 | 2018-10-10 | Carl Freudenberg KG | Dispositif de répartition de pression pour un boîtier |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394086B (zh) * | 2017-06-07 | 2023-12-01 | 惠州市沃瑞科技有限公司 | 一种应用于电芯模组上的防爆平衡阀 |
| DE102019100085A1 (de) * | 2019-01-04 | 2020-07-09 | Mann+Hummel Gmbh | Entgasungseinheit, Elektronikgehäuse, insbesondere Batteriegehäuse, und Kraftfahrzeug |
| DE102020109148A1 (de) * | 2020-04-02 | 2021-10-07 | Bayerische Motoren Werke Aktiengesellschaft | Batteriegehäuse mit Schutzkappe, Batterie sowie Kraftfahrzeug |
| CN213278312U (zh) * | 2020-11-19 | 2021-05-25 | 上汽大众汽车有限公司 | 电池包的泄压阀 |
| CN114188047B (zh) * | 2021-12-03 | 2024-05-14 | 中国原子能科学研究院 | 一种反应性控制装置 |
-
2023
- 2023-05-05 DE DE112023002165.1T patent/DE112023002165T5/de active Pending
- 2023-05-05 CN CN202380043663.9A patent/CN119318064A/zh active Pending
- 2023-05-05 WO PCT/IB2023/000265 patent/WO2023218242A2/fr not_active Ceased
- 2023-05-05 US US18/863,902 patent/US20250309465A1/en active Pending
- 2023-08-15 WO PCT/IB2023/000254 patent/WO2024175946A1/fr not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3385584A1 (fr) | 2017-04-06 | 2018-10-10 | Carl Freudenberg KG | Dispositif de répartition de pression pour un boîtier |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112023002165T5 (de) | 2025-02-27 |
| WO2024175946A1 (fr) | 2024-08-29 |
| US20250309465A1 (en) | 2025-10-02 |
| CN119318064A (zh) | 2025-01-14 |
| WO2023218242A3 (fr) | 2024-06-06 |
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