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WO2025204948A1 - Bloc-batterie - Google Patents

Bloc-batterie

Info

Publication number
WO2025204948A1
WO2025204948A1 PCT/JP2025/009478 JP2025009478W WO2025204948A1 WO 2025204948 A1 WO2025204948 A1 WO 2025204948A1 JP 2025009478 W JP2025009478 W JP 2025009478W WO 2025204948 A1 WO2025204948 A1 WO 2025204948A1
Authority
WO
WIPO (PCT)
Prior art keywords
case
battery pack
gas
secondary battery
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.)
Pending
Application number
PCT/JP2025/009478
Other languages
English (en)
Japanese (ja)
Inventor
隆介 辻口
祐仁 作間
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Publication of WO2025204948A1 publication Critical patent/WO2025204948A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H01M50/20—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
    • H01M50/204—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
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • 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
    • 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
    • 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

  • Battery packs that house rechargeable secondary battery cells, such as lithium-ion secondary batteries, inside an exterior case to power electrical equipment are used for a variety of purposes (see, for example, Patent Document 1).
  • rechargeable secondary battery cells such as lithium-ion secondary batteries
  • Patent Document 1 Battery packs that house rechargeable secondary battery cells, such as lithium-ion secondary batteries, inside an exterior case to power electrical equipment are used for a variety of purposes.
  • the gas must be vented to the exterior of the exterior case. For this reason, it is necessary to provide a gas vent path inside the exterior case to vent the high-temperature, high-pressure gas (see, for example, Patent Document 1).
  • the present disclosure may be characterized by the following configurations and features.
  • the case main surface has a thin-walled area formed by partially reducing the thickness. This configuration provides flexibility that allows the case main surface to easily deform so that it bulges outward when the internal pressure of the exterior case increases.
  • the multiple case-side exhaust holes are opened in the thin-walled region.
  • a battery pack according to yet another aspect of the present disclosure in any of the above aspects, further includes a label covering the area of the outer case where the groove is formed.
  • the label blocks the case-side discharge hole, preventing foreign matter from entering the interior of the outer case.
  • the pressure of gas discharged from the case-side discharge hole causes the label to break or peel off, opening the case-side discharge hole and allowing the gas to be released from the outer case to the outside.
  • each of the multiple secondary battery cells has a cylindrical outer shape
  • the gas discharge portion is provided on a first cell end face of the cylindrical end face of each secondary battery cell
  • the multiple secondary battery cells are arranged in a position where the first cell end faces are aligned on the same plane.
  • the exterior case includes a first case and a second case divided in a direction along the axes of the multiple secondary battery cells, and the joint surface between the first case and the second case is closer to the second cell end face opposite the first cell end face than to the first cell end face.
  • the first case is longer than the second case in the direction along the axes of the multiple secondary battery cells.
  • the outer case is not divided evenly, and by making the first case longer than the second case, it is possible to position the joint surface between the first case and the second case closer to the end face of the second cell.
  • the multiple case-side exhaust holes are unevenly distributed on the first case, closer to the surface where the first case joins with the second case.
  • the second case has multiple second case-side exhaust holes.
  • the distance traveled by gas exhausted from the first cell end face to the second case-side exhaust holes can be further increased, weakening the gas pressure and allowing it to be safely exhausted from the outer case.
  • the battery pack further includes a heat-resistant plate fixed in the internal space of the exterior case in a position facing the end face of the first cell.
  • FIG. 1 A battery pack 100 according to a first embodiment of the present disclosure is shown in Figures 1 to 8.
  • Figure 1 is a perspective view showing the battery pack 100 according to the first embodiment
  • Figure 2 is a cross-sectional view of the battery pack 100 of Figure 1 taken along line II-II
  • Figure 3 is a cross-sectional view of the battery pack 100 of Figure 1 taken along line III-III
  • Figure 4 is an exploded perspective view of the battery pack 100 of Figure 1 with the label unit 20 removed
  • Figure 5 is a perspective view of Figure 4 viewed obliquely from below
  • Figure 6 is a plan view of the battery pack 100 of Figure 4
  • Figure 7 is a further exploded perspective view of the battery pack 100 of Figure 4
  • Figure 8 is an exploded perspective view of the battery holder 5 of Figure 7.
  • the battery pack 100 shown in these figures includes an exterior case 10 and a battery block 2.
  • Battery block 2 As shown in Figure 7, a battery block 2 is housed inside the exterior case 10.
  • the battery block 2 also known as a core pack, is composed of a battery holder 5 that houses multiple rechargeable battery cells 1.
  • a circuit board 3 may also be added to the battery holder 5.
  • the battery block 2 is composed of a battery holder 5.
  • the battery holder 5 holds a large number of cylindrical secondary battery cells 1 housed in a horizontal position.
  • the multiple secondary battery cells 1 are connected in series or parallel via lead plates 4 or the like.
  • the number of series connections or parallel connections can be set as desired according to the required specifications.
  • eight secondary battery cells 1 are used in the battery block 2, resulting in a 4 series x 2 parallel connection.
  • the battery block may also be composed of multiple sub-blocks, each housing multiple secondary battery cells. Combining multiple sub-blocks to form a single battery block makes it easy to adjust the number of secondary battery cells included in the battery block.
  • the battery holder 5 has multiple storage cylinders 6 that individually store the secondary battery cells 1.
  • the end faces of the storage cylinders 6 of the battery holder 5 are open so that the secondary battery cells 1 can be inserted.
  • the present disclosure does not limit the battery holder to this configuration, and the battery holder can also be configured by dividing it into multiple sub-holders.
  • the battery holder can be divided into two, and the secondary battery cells can be sandwiched between the two storage cylinders.
  • the number of divisions of the battery holder is not limited to two, and can be three or more.
  • Such a battery holder 5 can be made of a resin such as polycarbonate, which has excellent insulating properties.
  • the battery holder 5 also has a connection window 7 on the end surface of the cylindrical storage tube 6 so that the cell end surface 1a of the secondary battery cell 1 stored in the cylindrical storage tube 6 can be connected to the lead plate 4 from outside the battery holder 5.
  • the connection window 7 is formed large enough to expose a portion of the cell end surface 1a.
  • circuit board 3 As shown in Figure 7, the battery block 2 is connected to a circuit board 3 via lead plates 4.
  • the circuit board 3 is equipped with a charge/discharge circuit that charges and discharges the rechargeable battery cells 1, and a protection circuit that monitors the voltage and temperature of the rechargeable battery cells 1 and cuts off the current in the event of an abnormality.
  • the circuit board 3 is made of a glass epoxy board or similar material.
  • a board holder for holding such a circuit board 3 may also be provided. The board holder can be connected to the battery holder.
  • the lead plates 4 connect the electrodes on the cell end faces 1a of the secondary battery cells 1 to each other, thereby connecting the multiple secondary battery cells 1 in series or parallel.
  • a lead plate 4 is disposed on each cell end face 1a of the secondary battery cells 1.
  • Each cell end face 1a may also be divided into multiple lead plates 4.
  • Each lead plate 4 is formed in a plate shape and connects the electrodes provided on the cell end faces 1a of the secondary battery cells 1 to each other.
  • lead plates 4 are made of metal plates with excellent conductivity, such as aluminum or nickel. If necessary, a coating of nickel or other material may be added to the surface of the lead plate 4.
  • the lead plate 4 is fixed to the cell end surface 1a of the secondary battery cell 1 by laser welding, spot welding, projection welding, or other methods.
  • Each of the secondary battery cells 1 may be a secondary battery cell with a cylindrical or rectangular outer shape.
  • cylindrical secondary battery cells 1 are arranged horizontally in a row.
  • the number and arrangement of the secondary battery cells 1 are not limited to this example, and any number and arrangement may be used as appropriate.
  • cylindrical secondary battery cells may be stacked in multiple stages.
  • the stacked secondary battery cells may be arranged in a staggered pattern, or in a grid or matrix pattern.
  • the cylindrical secondary battery cell 1 has a cell end surface 1a on each side of the cylinder.
  • the pair of cell end surfaces 1a consists of a first cell end surface 1a1 and a second cell end surface 1a2.
  • Each secondary battery cell 1 has a positive and negative electrode.
  • the positive and negative electrodes are preferably provided on the first cell end surface 1a1 of the secondary battery cell 1.
  • Such secondary battery cells 1 can be any known secondary battery, such as a lithium-ion secondary battery, nickel-metal hydride battery, or nickel-cadmium battery.
  • the multiple secondary battery cells 1 are held in the storage tube 6 of the battery holder 5 and are arranged so that the first cell end faces 1a1 are aligned on the same plane. This arrangement concentrates the surfaces from which high-temperature, high-pressure gas is discharged from the secondary battery cells 1 on one side, making it easier to define a gas discharge path 8 within the outer case 10 that guides the gas to the case-side discharge hole 13.
  • the exterior case 10 has case-side exhaust holes 13 formed in a portion thereof for discharging high-pressure gas to the outside when the gas exhaust portion 1c of the secondary battery cell 1 is opened and the gas is discharged. Specifically, a plurality of case-side exhaust holes 13 communicating with the storage space are opened in the case main surface 14 of the exterior case 10. In the example shown in FIGS. 4 to 6 , the case-side exhaust holes 13 are provided on the front side of the first case 11 of the exterior case 10.
  • case-side exhaust holes 13 are circular, but the shape of the case-side exhaust hole is not limited to this shape and may be rectangular, chamfered rectangular, polygonal such as octagonal, hexagonal, or square, or circular, track-shaped, elliptical, or the like.
  • the case main surface 14 has flexibility that allows it to deform and swell outward in response to the pressure of the gas discharged from the gas discharge portion 1c. In this way, by opening a plurality of case-side discharge holes 13 in the case main surface 14, rigidity is weakened and flexibility is imparted, and in an emergency, an increase in the internal pressure of the outer case 10 is used to inflate the outer case 10, forming an expansion space ES, which is used as the gas discharge path 8, without requiring a space for constant gas discharge within the outer case 10. This makes it possible to achieve the conflicting requirements of making the battery pack 100 thinner and ensuring a gas discharge path 8.
  • a gas exhaust path 908 is formed between the outer surface of the battery block 902 and the inner surface of the exterior case 910.
  • the gas exhaust path 908 is a path for guiding high-temperature, high-pressure gas to be exhausted from a case-side exhaust hole 913 opened in the exterior case 910 in an emergency, i.e., when high-temperature, high-pressure gas is exhausted from one of the secondary battery cells 901 into the interior of the exterior case 910.
  • the gas exhaust path 908 is not used but is present inside the exterior case 910. For this reason, the thickness D2 of the battery pack 900 is always increased by the amount of the gas exhaust path 908.
  • the gap between the outer surface of the battery block 2 and the inner surface of the exterior case 10 is narrowed, as shown in FIG. 10 .
  • the gas increases the internal pressure of the exterior case 10, and in response, as shown in FIG. 11 , the case main surface 14 of the exterior case 10 is pushed out from the inside and deforms in a bulging direction.
  • this expansion space ES as a gas exhaust path 8 it is possible to guide the gas to the case-side exhaust hole 13. In this way, the battery pack 100 according to embodiment 1 maintains a thin design while still providing a gas exhaust path 8 in an emergency.
  • the exterior case 10 by constructing the exterior case 10 from resin, it can be made flexible and easily deformed. Furthermore, by opening multiple case-side exhaust holes 13 on each of the pair of case main surfaces 14 of the exterior case 10, rigidity can be reduced and flexibility can be further increased, making it easier to deform due to the pressure generated when gas is released.
  • the case main surface 14 preferably includes a thin-walled region 15 formed by partially thinning the wall thickness. By thinning the case main surface 14 in this manner, the rigidity is further weakened, making it easier for the case main surface 14 to bulge outward due to the pressure of the high-temperature, high-pressure gas discharged into the exterior case 10 from the gas discharge portion 1c.
  • a thin-walled region 15 is preferably provided on the case main surface 14 on the first case 11 side. More preferably, as shown in Figures 3 and 4, the thin-walled region 15 is unevenly distributed in an area of the first case 11 close to the joint surface 16 with the second case 12.
  • the side of the secondary battery cell 1 far from the first cell end surface 1a1 where the gas discharge portion 1c is provided is made easier to deform.
  • This increases the rigidity of the area close to the gas exhaust section 1c, i.e., the area that is exposed to high-pressure gas that has just been released from the gas exhaust section 1c, thereby preventing gas from leaking to the outside from unintended locations due to breakage or deformation of the outer case 10, and guiding the gas along the intended gas exhaust path 8, increasing the possibility of safely exhausting the gas from the outer case 10 to the outside.
  • the multiple case-side exhaust holes 13 are preferably opened in the thin-walled region 15. This defines a gas exhaust path 8 for exhausting high-temperature, high-pressure gas from the outer case 10 through the multiple case-side exhaust holes 13 opened in the thin-walled region 15, guiding the gas to the case-side exhaust holes 13 where the pressure is relatively low, and applying pressure to the inner surface of the thin-walled region 15 makes it easier to deform the case main surface 14.
  • multiple grooves 17 can be formed on the outer surface of the case main surface 14. This further weakens the rigidity of the case main surface 14, increasing its flexibility and making it easier to deform.
  • the grooves 17 are formed in the thin-walled region 15.
  • the grooves 17 are formed in a lattice pattern with multiple lines crossing each other vertically and horizontally.
  • the grooves 17 formed in this lattice pattern can be interconnected.
  • the width and depth of the grooves 17 are designed according to the volume of the outer case 10 and the battery capacity of the secondary battery cells 1. For example, the width of the grooves 17 is 0.5 to 2.0 mm, and the depth is 0.1 to 1.0 mm.
  • case-side exhaust holes 13 open into the grooves 17. This allows gas exhausted from the case-side exhaust holes 13 to be guided into the grooves 17 as well. More preferably, the case-side exhaust holes 13 are each opened at the intersections of the grid-like grooves 17. This makes it easier for gas exhausted from the case-side exhaust holes 13 to be guided so that it spreads out in all directions along the grooves 17 that extend vertically and horizontally.
  • the number of case-side discharge holes 13 and the spacing between adjacent case-side discharge holes 13, i.e., the pitch, are also designed according to the volume of the outer case 10 and the battery capacity of the secondary battery cells 1.
  • the battery pack 100 can also include a label 20 attached to the exterior case 10.
  • the label 20 preferably covers the area where the groove 17 is formed. In this way, under normal circumstances, the label 20 blocks the case discharge hole 13, thereby preventing unintended foreign matter from entering the interior of the exterior case 10 through the case discharge hole 13.
  • the pressure of the gas discharged from the case discharge hole 13 causes the label 20 to break or peel off, opening the case discharge hole 13 and allowing the gas to be released from the exterior case 10 to the outside.
  • the label portion 20 is affixed to the thin-walled region 15.
  • a closed space CS in the groove portion 17 is formed between the label portion 20 and the thin-walled region 15, as shown in FIG. 3, etc.
  • forming the groove portion 17 on the outside of the outer case 10 and forming the closed space CS between it and the label portion 20 is also effective in preventing clogging of the case-side exhaust hole 13. That is, when high-temperature, high-pressure gas is exhausted from the secondary battery cell 1, foreign matter such as broken pieces of the electrode body may be exhausted from the inside of the outer can of the secondary battery cell 1 along with the gas.
  • the label section 20 is made of a material that can be torn by pressure or temperature when gas is discharged, opening the case-side discharge hole 13.
  • the label section 20 can be made of a resin such as polycarbonate or polypropylene, or a paper base material impregnated with or coated with resin.
  • the outer case 10 is divided into a first case 11 and a second case 12.
  • the first case 11 and the second case 12 are divided in a direction along the axis of the outer can of the secondary battery cell 1, which in this embodiment is the longitudinal direction of the secondary battery cell 1.
  • the joint surface 16 between the first case 11 and the second case 12 is closer to the second cell end surface 1a2 than to the first cell end surface 1a1. This configuration separates the joint surface 16 that divides the outer case 10 from the first cell end surface 1a1, making it easier to deform the case main surface 14.
  • the first case 11 is longer than the second case 12 in the longitudinal direction of the secondary battery cell 1.
  • the outer case 10 By not dividing the outer case 10 equally in this way and making the first case 11 longer than the second case 12, it is possible to position the joint surface 16 between the first case 11 and the second case 12 closer to the second cell end surface 1a2.
  • the multiple case-side exhaust holes 13 are biased toward the joining surface 16 of the first case 11 with the second case 12. In this way, by biasing the case-side exhaust holes 13 toward the joining surface 16 with the second case 12 rather than providing them evenly on the main surface of the first case 11, the distance that gas discharged from the first cell end surface 1a1 travels to the case-side exhaust holes 13 is lengthened, allowing the gas pressure to be weakened before it is safely discharged from the outer case 10.
  • grooves and case-side exhaust holes can be provided not only in the first case but also in the second case.
  • the second case 12 has multiple second-case-side exhaust holes 13B formed in its second main surface intersecting the first main surface.
  • the second-case-side exhaust holes 13B are also formed in the second groove 17B of the second thin-walled region 15B of the second case 12.
  • a second label 20B is attached to the second thin-walled region 15B.
  • the second thin-walled region 15B and second label 20B can be configured similarly to the thin-walled region 15 and label 20 of the first case 11 described above.
  • Heat-resistant plate 50 A heat-resistant plate 50 may also be placed between the surface of the battery holder 5 and the inner surface of the exterior case 10. In the example shown in FIG. 7 , the heat-resistant plate 50 is sized to cover the entire first cell end faces 1a1 of all of the secondary battery cells 1 in the battery block 2. By using the heat-resistant plate 50, which covers the battery holder 5 to improve impact resistance, to cover the cell end faces 1a where the gas exhaust ports 1c are located, even if high-temperature, high-pressure gas is exhausted from the gas exhaust port 1c of one of the secondary battery cells 1, this prevents the gas from immediately escaping from the battery pack and prevents a flame from igniting the gas from leaking directly outside the battery pack.
  • Such a heat-resistant plate 50 can be made of a material with excellent insulating and fire-resistant properties, such as mica.
  • an increase in the internal pressure of the exterior case can be used to create an expansion space that can be used as a gas release path, making it possible to achieve both the conflicting requirements of making the battery pack thinner and ensuring a gas release path.
  • the battery pack was used as a power source for an electric scooter, but the present disclosure is not limited to this.
  • the battery pack can also be used for other purposes, such as attaching it to an electrical device to be driven and supplying power to the electrical device.
  • Examples of electrical devices include mobile objects such as electric vehicles and electric carts, as well as portable electrical devices. In such electrical devices, when the remaining capacity of the battery pack becomes low or the battery pack deteriorates over time, the battery pack can be replaced to continue using the electrical device.
  • the present disclosure is not limited to replaceable battery packs that primarily house secondary battery cells, but can also be applied to configurations in which secondary battery cells are housed within the housing of the electrical device.
  • a battery pack is defined as a battery pack that houses secondary battery cells in a case, and also includes battery packs that house secondary battery cells for driving the electrical device within the housing itself.
  • the present disclosure is not limited to replaceable battery packs, but can also be applied to electrical devices that house secondary battery cells.
  • the battery pack of the present invention can be suitably used as a driving power source for mobile devices such as electric scooters, electric carts, and assisted bicycles; as a power source for radios; and as a power source for portable electrical devices such as electric cleaners and power tools. It can also be used as a backup power source for servers and other devices, and as a stationary power storage device for home, office, and factory use.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

L'invention concerne un bloc-batterie comprenant : un bloc-batterie composé d'une pluralité de cellules de batterie secondaire, dont chacune est pourvue d'une unité d'évacuation de gaz pour évacuer le gaz lorsque la pression intérieure augmente; et un boîtier extérieur pour recevoir le bloc-batterie dans un espace de réception intérieur. Dans le boîtier extérieur, une pluralité de trous de décharge côté boîtier communiquant avec l'espace de réception débouchent sur une surface principale de boîtier sur une surface interne. La surface principale de boîtier fait face à la pluralité de cellules de batterie secondaire et est pourvue d'une flexibilité telle que la surface principale de boîtier se déforme de façon à s'agrandir vers l'extérieur en fonction de la pression de gaz évacué de l'unité d'évacuation de gaz.
PCT/JP2025/009478 2024-03-26 2025-03-12 Bloc-batterie Pending WO2025204948A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2024-050484 2024-03-26
JP2024050484 2024-03-26

Publications (1)

Publication Number Publication Date
WO2025204948A1 true WO2025204948A1 (fr) 2025-10-02

Family

ID=97215899

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2025/009478 Pending WO2025204948A1 (fr) 2024-03-26 2025-03-12 Bloc-batterie

Country Status (1)

Country Link
WO (1) WO2025204948A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016072182A (ja) * 2014-10-01 2016-05-09 株式会社Ｇｓユアサ 蓄電装置及びそのガス排出方法
WO2020153018A1 (fr) * 2019-01-25 2020-07-30 三洋電機株式会社 Bloc batterie
WO2023200303A1 (fr) * 2022-04-15 2023-10-19 주식회사 엘지에너지솔루션 Module de batterie à sécurité renforcée
WO2024067982A1 (fr) * 2022-09-29 2024-04-04 Webasto SE Batterie de véhicule pour véhicule électrique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016072182A (ja) * 2014-10-01 2016-05-09 株式会社Ｇｓユアサ 蓄電装置及びそのガス排出方法
WO2020153018A1 (fr) * 2019-01-25 2020-07-30 三洋電機株式会社 Bloc batterie
WO2023200303A1 (fr) * 2022-04-15 2023-10-19 주식회사 엘지에너지솔루션 Module de batterie à sécurité renforcée
WO2024067982A1 (fr) * 2022-09-29 2024-04-04 Webasto SE Batterie de véhicule pour véhicule électrique

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