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WO2025210776A1 - Bloc-batterie - Google Patents

Bloc-batterie

Info

Publication number
WO2025210776A1
WO2025210776A1 PCT/JP2024/013761 JP2024013761W WO2025210776A1 WO 2025210776 A1 WO2025210776 A1 WO 2025210776A1 JP 2024013761 W JP2024013761 W JP 2024013761W WO 2025210776 A1 WO2025210776 A1 WO 2025210776A1
Authority
WO
WIPO (PCT)
Prior art keywords
area
battery pack
battery
partition plate
communication
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/JP2024/013761
Other languages
English (en)
Japanese (ja)
Inventor
雄地 宮本
友晃 橿村
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to PCT/JP2024/013761 priority Critical patent/WO2025210776A1/fr
Publication of WO2025210776A1 publication Critical patent/WO2025210776A1/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
    • H01M50/289—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
    • H01M50/291—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 characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • 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

  • JP2018-037244A discloses a power supply device with a built-in power supply unit.
  • a battery pack includes a case, partition plates that divide the interior of the case into multiple areas, intra-area batteries housed in each area, and connectors that connect the intra-area batteries in series.
  • the partition plates are formed with communication openings that connect adjacent areas, and the lower ends of the positive electrode terminal portions that form the positive electrodes of the intra-area batteries and the negative electrode terminal portions that form the negative electrodes are located lower than the communication openings.
  • the battery pack can discharge batteries within each area without creating a difference in elevation between the areas in which the batteries are placed.
  • FIG. 1 is a schematic diagram showing a battery pack according to an embodiment.
  • FIG. 2 is a perspective view showing an in-area battery.
  • FIG. 3 is a schematic cross-sectional view showing the battery pack according to the embodiment.
  • FIG. 4 is an explanatory diagram showing a state in which water has flooded from one adjacent area into the other adjacent area.
  • FIG. 5 is an explanatory diagram for explaining the effect of a battery pack in which a communication port is disposed in the center of the partition plate in the plate width direction.
  • FIG. 6 is a schematic cross-sectional view showing a battery pack according to a first modification.
  • FIG. 7 is a diagram showing a communication port of a battery pack according to a second modified example.
  • FIG. 1 is a schematic diagram showing a battery pack according to an embodiment.
  • FIG. 2 is a perspective view showing an in-area battery.
  • FIG. 3 is a schematic cross-sectional view showing the battery pack according to the embodiment.
  • FIG. 4 is an explanatory
  • the interior of the case 12 is divided into a first area 20, a second area 22, a third area 24, and a fourth area 26 by partitions.
  • the partitions dividing the interior of the case 12 include a first partition plate 30 that separates the first area 20 from the second area 22, and a second partition plate 32 that separates the second area 22 from the third area 24.
  • the partitions dividing the interior of the case 12 also include a third partition plate 34 that separates the third area 24 from the fourth area 26, and a fourth partition plate 36 that separates the fourth area 26 from the first area 20.
  • the first area battery 50 is composed of multiple batteries connected in series.
  • the configuration of the area batteries (50, 52, 54, 56) will be explained using the first area battery 50 as an example, but each area battery 50, 52, 54, 56 is configured similarly.
  • the series-connected batteries that make up each of the in-area batteries 50, 52, 54, and 56 are composed of a first battery module 70 and a second battery module 72.
  • the second battery module 72 is also composed of multiple cells (single cells).
  • the cells are composed of a first cell 80-1 to a sixth cell 80-6.
  • the positive terminal of one adjacent cell is connected to the negative terminal of the other cell, and the first cell 80-1 to the sixth cell 80-6 are connected in series.
  • the negative terminal 72A of the first cell 80-1 forms the negative electrode of the second battery module 72
  • the positive terminal 72B of the sixth cell 80-6 forms the positive electrode of the second battery module 72.
  • the first battery module 70 which is one of the batteries connected in series
  • the second battery module 72 which is the other battery
  • One adjacent terminal comprises the positive terminal 70B of the sixth cell 80-6 of the first battery module 70
  • the other terminal comprises the negative terminal 72A of the first cell 80-1 of the second battery module 72.
  • the conductive member 90 and the terminals 70B, 72A to which the conductive member 90 is connected are positioned higher than the communication openings 40 formed in the partition plates 30, 32, 34, and 36.
  • the negative electrode of the first area battery 50 is formed by the negative terminal 70A of the first cell 80-1 in the first battery module 70.
  • a negative electrode terminal 100 formed by a bus bar or the like is connected to this negative terminal 70A.
  • the upper end of the negative electrode extension 100B extends above the negative terminal 70A of the first cell 80-1.
  • the lower end of the negative electrode extension 100B reaches the lower end of the side surface of the first cell 80-1.
  • the lower end of the negative electrode extension 100B in the negative electrode terminal portion 100 is located lower than the lower edge 40A, which serves as the lowermost portion of the communication openings 40 formed in each partition plate 30, 32, 34, and 36 (see Figure 3).
  • the positive electrode of the first area battery 50 is formed by the + terminal 72B of the sixth cell 80-6 in the second battery module 72.
  • a positive electrode terminal portion 102 formed by a bus bar or the like is connected to this + terminal 72B.
  • the positive electrode terminal portion 102 is made of a metal plate.
  • the positive electrode terminal portion 102 has, for example, a positive terminal connection portion 102A that connects to the positive terminal 72B of the sixth cell 80-6, and a positive electrode extension portion 102B that connects to the end of the positive terminal connection portion 102A and extends downward along the side surface of the sixth cell 80-6.
  • the upper end of the positive electrode extension 102B extends above the positive terminal 72B of the sixth cell 80-6.
  • the lower end of the positive electrode extension 102B reaches the lower end of the side surface of the sixth cell 80-6.
  • the lower end of the positive electrode extension 102B in the positive electrode terminal portion 102 is located lower than the lower edge 40A, which serves as the lowermost portion of the communication openings 40 formed in each of the partition plates 30, 32, 34, and 36 (see Figure 3).
  • the lower end of the positive electrode terminal portion 102 constituting the positive electrode of each in-area battery 50, 52, 54, 56 and the lower end of the negative electrode terminal portion 100 constituting the negative electrode are positioned lower than the communication opening 40.
  • the negative electrode terminal 100 of the first area battery 50 arranged in the first area 20 constitutes the negative electrode of the battery pack 10.
  • the negative electrode terminal 100 of each area battery 52, 54, 56 arranged in the second area 22, third area 24, and fourth area 26 is connected via connection part 60 to the positive electrode terminal 102 of each area battery 50, 52, 54 arranged in the adjacent areas 20, 22, 24.
  • the positive electrode terminal 102 of the fourth area battery 56 arranged in the fourth area 26 constitutes the positive electrode of the battery pack 10.
  • the positive electrode terminal 102 of each area battery 50, 52, 54 arranged in the first area 20, second area 22, and third area 24 is connected via connection parts 60 to the negative electrode terminal 100 of each area battery 50, 52, 54 arranged in the adjacent areas 20, 22, 24.
  • a battery pack 10 configured as described above, if part of the case 12 is damaged and water enters the first area 20 within the case 12 (see Figure 3), only the first area batteries 50 in the first area 20 will be submerged until the water level reaches the communication openings 40 in the first partition plate 30 and fourth partition plate 36.
  • this battery pack 10 does not require differences in height between areas, it is possible to suppress an increase in the height dimension of the battery pack 10 even if the number of batteries 50, 52, 54, and 56 installed in each area increases. This makes it easy to adjust the layout of this battery pack 10 when installing it in, for example, a vehicle 310 (see Figure 13).
  • each in-area battery 50, 52, 54, 56 is made up of multiple batteries (70, 72) connected in series.
  • the terminals (70B, 72A) of the series-connected batteries (70, 72) and the conductive member 90 connected to both terminals (70B, 72A) are positioned higher than the communication port 40. Therefore, as the water level rises within the case 12, the in-area batteries 50, 52, 54, 56 in each of the areas 20, 22, 24, 26 are discharged in sequence, and then the conductive members 90 of the in-area batteries 50, 52, 54, 56 in each of the areas 20, 22, 24, 26 become submerged.
  • the separation distance R1 from the positive electrode terminal 102 to the negative electrode terminal 100 is longer than the separation distance R2 from the positive electrode terminal 102 to the terminal (72A) to which the conductive member 90 is connected. Furthermore, the separation distance R1 from the positive electrode terminal 102 to the negative electrode terminal 100 is longer than the separation distance R3 from the negative electrode terminal 100 to the terminal (70B) to which the conductive member 90 is connected.
  • the communication opening 40 is located in the center of the partition plates (30, 32, 34, 36) in the plate width direction PW.
  • the communication port 40 is located in the center of the partition plates (30, 32, 34, 36) in the plate width direction PW, making it possible to prevent water from entering adjacent areas (20, 22, 24, 26) when the battery pack 10 is tilted. Therefore, even if the battery pack 10 is tilted while mounted on the vehicle 310, it is possible to sequentially discharge the in-area batteries 50, 52, 54, 56 housed in each area 20, 22, 24, 26.
  • the intra-area batteries 50, 52, 54, and 56 housed in the areas 20, 22, 24, and 26 are each configured as a single battery module (50, 52, 54, and 56).
  • each of the area batteries 50, 52, 54, and 56 was configured as a single battery module, but each of the area batteries 50, 52, 54, and 56 may also be a single cell.
  • FIG. 7 is a diagram showing a communication port 212 of a battery pack 210 according to a second modified example.
  • the communication openings 212 that connect adjacent areas (20, 22, 24, 26) may be formed, for example, by rectangular cutouts formed in the upper edges of the partition plates (30, 32, 34, 36). Note that Figure 7 shows the first partition plate 30 as an example.
  • the communication openings 40 are configured as rectangular openings formed in each of the partition plates 30, 32, 34, and 36, but the communication openings 40 are not limited to this configuration.
  • the communication openings 40 formed in each of the partition plates 30, 32, 34, and 36 may also be configured as in the third to seventh modified examples shown below.
  • (Third Modification) 8 is a diagram showing a communication port 222 of a battery pack 220 according to a third modified example.
  • the communication port 222 of the battery pack 220 according to the third modified example is configured as a triangular opening with its apex facing downward.
  • the opening width OW of this communication port 222 is wider at the high position than at the low position.
  • FIG. 9 is a diagram showing a communication port 232 of a battery pack 230 according to a fourth modified example.
  • the communication port 232 of the battery pack 230 according to the fourth modified example is configured as a triangular notch formed in the upper edge of each partition plate 30, 32, 34, 36 with its apex facing downward.
  • the opening width OW of this communication port 232 is wider at the high position than at the low position.
  • FIG. 9 shows the first partition plate 30 as an example.
  • FIG. 11 is a diagram showing a communication port 262 of a battery pack 260 according to a sixth modified example.
  • the communication port 262 of the battery pack 260 according to the sixth modified example is configured as a semicircular opening with an arc on the lower side.
  • the opening width OW of this communication port 262 is wider at the high position than at the low position.
  • (Seventh Modification) 12 is a diagram showing a communication port 282 of a battery pack 280 according to a seventh modification.
  • the communication port 282 of the battery pack 280 according to the seventh modification is configured with a first rectangular hole 284 and a second rectangular hole 286 that have different heights and are arranged so that their upper edges are at the same height.
  • the opening width OW of each communication opening 222, 232, 242, 262, and 282 is wider at the high position than at the low position.
  • the battery packs 220, 230, 240, 260, and 280 configured in this manner, when the water level in a specified area (20, 22, 24, and 26) is low, the amount of water entering the adjacent areas (20, 22, 24, and 26) is suppressed. On the other hand, in the battery packs 220, 230, 240, 260, and 280, when the water level in a specified area (20, 22, 24, and 26) is high, the amount of water entering the adjacent areas (20, 22, 24, and 26) increases.
  • the battery packs 220, 230, 240, 260, 280 can take their time to discharge the batteries 50, 52, 54, 56 in each of the areas 20, 22, 24, 26 until the water level rises. Furthermore, when the water level in each area 20, 22, 24, 26 rises, the battery packs 220, 230, 240, 260, 280 can increase the amount of water entering the adjacent areas 20, 22, 24, 26. This allows the battery packs 220, 230, 240, 260, 280 to quickly discharge the batteries 50, 52, 54, 56 in the adjacent areas 20, 22, 24, 26 when the water level in each area 20, 22, 24, 26 rises.
  • Figure 13 is a schematic diagram showing a battery pack 300 according to an eighth modified example.
  • Figure 14 is a cross-sectional view taken along line XIV-XIV in Figure 13, and is an explanatory diagram showing the state of flooding. Note that in-area batteries in each area (320, 322, 324, 326, 328) are omitted from Figures 13 and 14.
  • the battery pack 300 according to the eighth modification differs from the previously described embodiment in the number of areas (320, 322, 324, 326, 328) formed within the case 12.
  • the case 12 of the battery pack 300 according to the eighth modified example has multiple areas (320, 322, 324, 326, 328) formed in the vehicle width direction VW when mounted on the vehicle 310. Specifically, four rows of areas are formed in the vehicle fore-and-aft direction FR inside the case 12, and five columns of areas are formed in the vehicle width direction VW. This results in twenty areas being formed inside the case 12.
  • the sixth partition plate 332, which separates the eighth area 324 and the seventh area 322, is positioned closer to the center C in the vehicle width direction than the fifth partition plate 330, which separates the seventh area 322 and the sixth area 320.
  • the lower edge 40A of the communication opening 40 of the sixth partition plate 332 is positioned higher than the lower edge 40A of the communication opening 40 of the fifth partition plate 330.
  • the seventh partition plate 334 which separates the eighth area 324 and the ninth area 326, is positioned closer to the center C in the vehicle width direction than the eighth partition plate 336, which separates the ninth area 326 and the tenth area 328.
  • the lower edge 40A of the communication opening 40 of the seventh partition plate 334 is positioned higher than the lower edge 40A of the communication opening 40 of the eighth partition plate 336.
  • a plurality of areas are formed in the vehicle width direction VW when the battery pack 300 is mounted on the vehicle 310.
  • the plurality of partition plates (330, 332, 334, 336) arranged side by side in the vehicle width direction VW the lowermost portion of the communication opening 40 of the partition plate (332, 334) arranged on the vehicle width center C side is positioned higher than the lowermost portion of the communication opening 40 of the partition plate (330, 336) arranged on the vehicle width outer side O.
  • FIG. 15 is a schematic diagram showing a battery pack 400 according to a ninth modified example.
  • FIG. 16 is a diagram showing the communication openings 40 formed in the partition plates (30, 32, 34, 36) of the battery pack 400 according to the ninth modified example.
  • the battery pack 400 according to the ninth modified example has communication openings 40 formed in the partition plates (30, 32, 34, 36) with different heights depending on the location.
  • the height positions of the lower edges 40A, which are the lowest parts of the communication openings 40, of the partition plates (30, 32, 34, 36) that divide the predetermined area are different.
  • the height position of the lower edge 40A of the communication opening 40 of the third partition plate 34 that separates the fourth area 26 and the third area 24 is higher than the lower edge 40A of the communication opening 40 of the fourth partition plate 36 that separates the fourth area 26 and the first area 20.
  • the communication openings 40 of the third partition plate 34 and the fourth partition plate 36 that separate the fourth area 26 as a specified area have lower edge 40A that are different in height.
  • the height position of the lower edge 40A of the communication opening 40 formed in the second partition plate 32 that separates the second area 22 from the third area 24 is lower than the lower edge 40A of the communication opening 40 formed in the first partition plate 30 that separates the second area 22 from the first area 20.
  • the communication openings 40 of the first partition plate 30 and the second partition plate 32 that separate the second area 22 as a specified area have lower edge 40A that are different heights.
  • the height position of the lower edge 40A of the communication opening 40 formed in the second partition plate 32 that separates the third area 24 from the second area 22 is lower than the lower edge 40A of the communication opening 40 formed in the third partition plate 34 that separates the third area 24 from the fourth area 26.
  • the communication openings 40 of the second partition plate 32 and the third partition plate 34 that separate the third area 24 as a specified area have lower edge 40A that are different in height.
  • each communication port 40 in this modified example may also be configured as a notch formed in the upper edge of each partition plate 30, 32, 34, 36.
  • the communication openings 40 of the partition plates (30, 32, 34, 36) that separate the predetermined area are located at different height positions at the bottom.
  • the battery pack 400 can control the order in which adjacent areas (20, 22, 24, 26) are flooded. This prevents the batteries (50, 52, 54, 56) in the adjacent areas (20, 22, 24, 26) from discharging simultaneously, thereby reducing the amount of heat that can be generated during discharge.
  • the battery packs 10, 200, 210, 220, 230, 240, 260, 280, 300, and 400 of the above-described embodiment and each modified example have been described as being used in an electric vehicle whose drive wheels are driven by a motor, but are not limited to this configuration.
  • the battery packs 10, 200, 210, 220, 230, 240, 260, 280, 300, and 400 may also be used, for example, in a hybrid vehicle whose drive wheels are driven by both an engine and a motor.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne un bloc-batterie comprenant : un boîtier ; une plaque de séparation qui divise l'intérieur du boîtier en une pluralité de zones ; une batterie logée dans chaque zone ; et une partie connexion qui connecte les batteries de chaque zone en série. Une ouverture de communication pour permettre une communication entre des zones adjacentes est formée dans la plaque de séparation, et une extrémité inférieure d'une partie de borne d'électrode positive constituant une électrode positive et une extrémité inférieure d'une partie de borne d'électrode négative constituant une électrode négative de la batterie de chaque zone sont positionnées plus bas que l'ouverture de communication.
PCT/JP2024/013761 2024-04-03 2024-04-03 Bloc-batterie Pending WO2025210776A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2024/013761 WO2025210776A1 (fr) 2024-04-03 2024-04-03 Bloc-batterie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2024/013761 WO2025210776A1 (fr) 2024-04-03 2024-04-03 Bloc-batterie

Publications (1)

Publication Number Publication Date
WO2025210776A1 true WO2025210776A1 (fr) 2025-10-09

Family

ID=97267036

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2024/013761 Pending WO2025210776A1 (fr) 2024-04-03 2024-04-03 Bloc-batterie

Country Status (1)

Country Link
WO (1) WO2025210776A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000030190A1 (fr) * 1998-11-17 2000-05-25 C & D Technologies, Inc. Systeme de support pour batterie plomb-acide a encombrement fixe et capacite pouvant etre selectionnee, pourvu de plaques horizontales
WO2013061541A1 (fr) * 2011-10-28 2013-05-02 パナソニック株式会社 Bloc-batterie
JP2018037244A (ja) * 2016-08-30 2018-03-08 三洋電機株式会社 電源装置及びこれを備える車両
WO2018131461A1 (fr) * 2017-01-11 2018-07-19 三洋電機株式会社 Système d'accumulation d'energie
JP2021131936A (ja) * 2020-02-18 2021-09-09 株式会社デンソー 電池装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000030190A1 (fr) * 1998-11-17 2000-05-25 C & D Technologies, Inc. Systeme de support pour batterie plomb-acide a encombrement fixe et capacite pouvant etre selectionnee, pourvu de plaques horizontales
WO2013061541A1 (fr) * 2011-10-28 2013-05-02 パナソニック株式会社 Bloc-batterie
JP2018037244A (ja) * 2016-08-30 2018-03-08 三洋電機株式会社 電源装置及びこれを備える車両
WO2018131461A1 (fr) * 2017-01-11 2018-07-19 三洋電機株式会社 Système d'accumulation d'energie
JP2021131936A (ja) * 2020-02-18 2021-09-09 株式会社デンソー 電池装置

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