WO2014010439A1 - Système de batterie, véhicule comportant le système de batterie, et dispositif accumulateur - Google Patents

Système de batterie, véhicule comportant le système de batterie, et dispositif accumulateur Download PDF

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Publication number
WO2014010439A1
WO2014010439A1 PCT/JP2013/067810 JP2013067810W WO2014010439A1 WO 2014010439 A1 WO2014010439 A1 WO 2014010439A1 JP 2013067810 W JP2013067810 W JP 2013067810W WO 2014010439 A1 WO2014010439 A1 WO 2014010439A1
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Prior art keywords
active material
battery
battery system
separator
electrode body
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PCT/JP2013/067810
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English (en)
Japanese (ja)
Inventor
高志 瀬戸
岡田　渉
真祐 中村
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三洋電機株式会社
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Priority to JP2014524735A priority Critical patent/JP6177776B2/ja
Publication of WO2014010439A1 publication Critical patent/WO2014010439A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0007—Measures or means for preventing or attenuating collisions
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
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    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/10—Dynamic electric regenerative braking
    • B60L7/14—Dynamic electric regenerative braking for vehicles propelled by ac motors
    • H—ELECTRICITY
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    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • H—ELECTRICITY
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    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0481—Compression means other than compression means for stacks of electrodes and separators
    • H—ELECTRICITY
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    • 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
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular 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
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
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    • 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
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    • 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
    • H01M50/293—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 the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/30—AC to DC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
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    • B60L2210/00—Converter types
    • B60L2210/40—DC to AC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60L2240/00—Control parameters of input or output; Target parameters
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    • B60L2240/12—Speed
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    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
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    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
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    • H01M50/543—Terminals
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    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
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Definitions

  • the present invention relates to a battery system in which a plurality of rectangular batteries are fixed in a stacked state via a separator, and in particular, includes a battery system and a battery system that are fixed in a stacked state by pressing the rectangular cells with a predetermined pressure.
  • the present invention relates to a vehicle and a power storage device.
  • a battery system in which a plurality of rectangular batteries are stacked has been developed.
  • This battery system has high volumetric efficiency and can increase the capacity of charge / discharge with respect to the volume.
  • a square battery and a separator are laminated by sandwiching a separator between square batteries and fixed in a laminated state.
  • a battery system in which a plurality of prismatic batteries and separators are alternately stacked and fixed in a stacked state is pressed at a predetermined pressure from both sides, fixed in the pressed state, and the separator and the prismatic battery are in close contact with each other.
  • the battery system of Patent Document 1 is fixed in a stacked state with a separator having an outer shape smaller than that of a square battery.
  • This battery system has a drawback that when the electrode body of the rectangular battery is expanded, the outer can is deformed or damaged at the boundary between the region in close contact with the separator and the region in close contact with the separator. The expansion of the electrode body occurs in the charged state of the rectangular battery, and also occurs over time due to repeated charging and discharging.
  • the adverse effect that the electrode body expands and the outer can is locally deformed can be eliminated by making the outer shape of the separator the same shape as the rectangular battery.
  • the separator presses the entire wide plane of the outer can, the welding of the rectangular battery outer can and the sealing plate in a state where the square battery is pressed from both sides in the assembly process. There is a risk that the parts and the like are pressed and damaged by the separator.
  • the pressure to pressurize the square battery is weakened, that is, the pressure to fix the battery stack of the square battery and the separator in a pressurized state is weakened, and the welded portion between the sealing plate and the outer can Although damage can be reduced, in this state, there is a drawback that the expansion of the prismatic battery cannot be prevented.
  • An important object of the present invention is to provide a battery system, a vehicle including the battery system, and a power storage device that can reliably and stably prevent expansion of the rectangular battery while preventing damage to the outer can of the rectangular battery.
  • the electrode body 11 formed by laminating or winding the positive electrode 11A and the negative electrode 11B formed by attaching the active material 32 to the surface of the core body 31 via the insulating layer 11C is formed in the rectangular outer can 12.
  • a plurality of prismatic batteries 1 that are housed and hermetically sealed, a separator 2 that is disposed between the prismatic batteries 1, and a battery stack 9 that is formed by alternately stacking the prismatic batteries 1 and the separators 2 are provided.
  • a fixing member 3 that is pressed from both ends in the stacking direction with a predetermined pressure and fixed in a pressurized state.
  • the outer can 12 of the rectangular battery 1 has an active material contact region 12X in which the inner surface is in contact with the active material application region 11X of the electrode body 11 and an active material non-contact in which the inner surface is not in contact with the active material application region 11X of the electrode body 11. And a region 12Y.
  • the separator 2 has an active material pressing portion 2X that presses the active material contact region 12X of the outer can 12 more strongly than the active material non-contact region 12Y in a state where the fixing member 3 fixes the battery stack 9 in a pressed state. ing. In the battery system, the battery stack 9 is fixed in a pressurized state in a state where the active material pressing portion 2X of the separator 2 presses the active material contact area 12X of the outer can 12 more strongly than the active material non-contact area 12Y.
  • the above battery system has the feature that the expansion of the prismatic battery can be reliably and stably prevented while preventing damage to the outer can of the prismatic battery. This is because the battery system described above does not press the entire surface of the rectangular battery uniformly with a separator as in the prior art, nor does it press a part of the electrode body and fix it in a pressurized state.
  • an active material pressing part that presses the active material contact area of the outer can more strongly than the active material non-contact area is provided, and with this active material pressing part, the active material contact area of the outer can is stronger than the active material non-contact area. It is because it presses.
  • the electrode body expands due to repeated charge / discharge, but the entire electrode body does not expand but the active material attached to the electrode body expands.
  • the active material contact area of the outer can that is in contact with the active material application area of the electrode body is pressed by the active material pressing portion provided in the separator and fixed in the stacked state.
  • the battery system in which the active material pressing portion of the separator presses the active material contact area of the outer can and is fixed in a pressure-laminated state is such that when the active material expands, the outer can contact with the active material application area of the electrode body The active material contact area is strongly pressed by the separator, but the active material non-contact area of the outer can that does not contact the active material application area is not strongly pressed through the separator.
  • the battery system in which the active material pressing portion of the separator strongly presses the active material contact area of the outer can is deformed when the upper edge portion or the like that is a deformable outer can sealing portion is strongly pressed by the separator, or There is no damage. This is because the upper edge or the like of the outer can is an area that does not contact the active material application area.
  • the rectangular battery and the separator are alternately laminated, and even in a state where the battery is pressed from both ends and fixed to the pressurized state, the weak part of the outer can can be strongly pressed.
  • the expansion of the electrode body particularly the expansion of the active material application region of the electrode body, can be reliably prevented in use while preventing damage to the outer can in the assembly process.
  • the battery system of the present invention includes an electrode body 11 in which a square battery 1 is wound around a positive electrode 11A and a negative electrode 11B and pressed into a plate shape having a predetermined thickness.
  • the electrode body 11 is an active material application region 11X.
  • the core body exposed region 11Y, and the separator 2 can press the active material contact region 12X of the outer can 12 in contact with the active material application region 11X with the active material pressing portion 2X.
  • the active material non-contact area of the outer can that contacts the core exposed area is not strongly pressed by the separator, and the active material pressing portion of the separator strongly presses the active material contact area.
  • the outer can 12 of the prismatic battery 1 has a rectangular wide flat surface 12A on both sides facing each other, and the electrode body 11 is wound around the positive electrode 11A and the negative electrode 11B and pressed to a predetermined thickness.
  • the core body exposed region 11Y can be provided on both sides with the opposing surface being planar.
  • the battery system is configured such that the opposing planes of the electrode body 11 are arranged inside the wide plane 12A of the outer can 12 and the core exposed areas 11Y are arranged on both sides of the wide plane 12A of the outer can 12 so as to widen the width.
  • Both sides of the plane 12A are active material non-contact areas 12Y, the active material application area 11X of the electrode body 11 is arranged at the center of the outer can 12, and the center of the wide plane 12A is the active material contact area 12X.
  • the active material pressing portion 2X of the separator 2 can press the active material contact region 12X at the central portion of the wide flat surface 12A.
  • the active material pressing portion of the separator strongly presses the active material contact area of the outer can without pressing the active material non-contact area on both sides of the outer can facing the unexposed core body exposed area with the separator.
  • the prismatic battery 1 hermetically seals the opening of the outer can 12 with the sealing plate 13, and the electrode body 11 is separated from the sealing plate 13 and disposed inside the outer can 12.
  • the upper edge portion along the sealing plate 13 of the 12 wide flat surfaces 12A can be used as the active material non-contact region 12Y.
  • the active material application region of the electrode body is strongly pressed to reliably prevent the expansion, and the upper edge portion along the sealing plate on the wide flat surface of the outer can is strongly pressed by the separator and is damaged. Can be surely prevented.
  • the rectangular battery 1 can be a non-aqueous electrolyte battery.
  • the battery system described above can prevent adverse effects due to the expansion of the active material while increasing the charge / discharge capacity with respect to the volume by using a square battery as a non-aqueous electrolyte battery.
  • the rectangular battery 1 can be a lithium ion battery.
  • the battery system described above can prevent adverse effects due to expansion of the active material while increasing the charge / discharge capacity with respect to the volume by using a square battery as a lithium ion battery.
  • the separator 2 has a guide wall 22 on the outer periphery which is set in a fixed position with the prismatic battery 1 set on the inner side.
  • the rectangular battery 1 and the separator 2 can be laminated.
  • the battery system described above has a feature that a prismatic battery can be placed in a fixed position with a separator while preventing deformation and damage of the active material non-contact region of the outer can and preventing an adverse effect due to expansion of the active material.
  • the separator 2 is provided with guide walls 22 for guiding the four corners of the prismatic battery 1 at the four corners, and the outer can 12 is provided with the active material non-contact regions 12Y on both sides of the wide plane 12A. Furthermore, the separator 2 can be provided with a notch recess 29 in a portion facing the active material non-contact region 12Y provided on both sides of the outer can 12.
  • the active material pressing portion of the separator prevents the active material from expanding, and the separator is disposed in a fixed position with the separator while the separator is not in the active material non-contact region on both sides of the outer can. It is possible to surely prevent the adverse effect of deforming or damaging by pressing strongly.
  • the prismatic battery 1 is provided with active material non-contact regions 12Y on both sides and upper and lower portions of the wide plane 12A of the outer can 12, and the separator 2 faces the upper and lower portions of the wide plane 12A.
  • the non-pressing part 2Y can be provided in the part, and the active material pressing part 2X can be protruded from the non-pressing part 2Y.
  • the active material pressing portion of the separator can prevent deformation of the active material non-contact region provided on the upper and lower portions of the outer can while preventing the expansion of the active material.
  • the active material pressing portion 2X of the separator 2 can be protruded by 0.1 mm to 0.5 mm from the non-pressing portion 2Y.
  • the battery system described above has a feature that the active material pressing part protruding from the non-pressing part can reliably prevent the active material of the electrode body from expanding.
  • the active material pressing portion 2X of the separator 2 can project the central portion high.
  • the battery system described above has a feature that the expansion of the active material can be prevented in a more preferable state without damaging the outer can with the central portion of the active material pressing portion protruding highly.
  • a vehicle according to the present invention includes any one of the battery systems 100 described above, a traveling motor 93 that is supplied with power from the battery system 100, a vehicle main body 90 that includes the battery system 100 and the motor 93, and a motor 93. And a wheel 97 for driving the vehicle main body 90.
  • any one of the battery systems 100 described above is provided, and a power controller 84 that controls charging / discharging of the battery system 100 is provided.
  • the power supply controller 84 can charge the prismatic battery with electric power from the outside and can control to charge the prismatic battery.
  • FIG. 12 is an exploded cross-sectional view of the prismatic battery and separator shown in FIG. 11. It is a principal part expanded sectional view of the separator shown in FIG. It is a horizontal sectional view which shows the laminated structure of a square battery and a separator.
  • FIG. 15 is an exploded cross-sectional view of the prismatic battery and separator shown in FIG. 14. It is a block diagram which shows the example which mounts a battery system in the hybrid car which drive
  • the battery system shown in FIGS. 1 to 3 includes a battery stack 9 in which rectangular batteries 1 and separators 2 are alternately stacked, and presses the battery stack 9 by pressing it from both ends in the stacking direction with a predetermined pressure. And a fixing member 3 fixed in a state.
  • the fixing member 3 As the fixing member 3, the end plates 4 are arranged at both ends of the battery stack 9, and the pair of end plates 4 are connected by a connector 5 to add the respective square batteries 1 and separators 2. The pressure is fixed.
  • the prismatic battery 1 is formed by laminating or winding a positive electrode 11A and a negative electrode 11B each having an active material 32 attached to the surface of a core body 31 via an insulating layer 11C.
  • the electrode body 11 is housed in a rectangular outer can 12, and the opening of the outer can 12 is hermetically sealed with a sealing plate 13.
  • the outer can 12 is also filled with an electrolytic solution (not shown).
  • the electrolytic solution is filled from the injection hole 33 provided in the sealing plate 13 after the sealing plate 13 is welded and fixed to the outer can 12.
  • the injection hole 33 is airtightly closed after being filled with the electrolytic solution.
  • the opening of the outer can can be sealed with a sealing plate.
  • the prismatic battery 1 is a rechargeable battery, and a non-aqueous electrolyte battery lithium ion battery is suitable.
  • the battery system in which the prismatic battery 1 is a lithium ion battery can increase the charging capacity with respect to the volume and weight of the battery stack 9.
  • the present invention does not specify a square battery as a lithium ion battery of a non-aqueous electrolyte battery, and any secondary battery that can be charged, such as a non-aqueous electrolyte battery that is not a lithium ion battery, a nickel metal hydride battery, or a nickel cadmium battery. It can be.
  • FIG. 3 to 5 show the lithium ion battery of the prismatic battery 1.
  • a sealing plate 13 is welded to the opening of the outer can 12, and the opening of the outer can 12 is hermetically sealed with the sealing plate 13.
  • the outer can 12 has a cylindrical shape with the bottom closed and opened upward in the figure, and both opposing surfaces are formed as a rectangular wide flat surface 12A.
  • the outer can 12 having this shape is manufactured by pressing a metal plate such as aluminum or aluminum alloy.
  • the sealing plate 13 is insulated from the positive and negative electrode terminals 15 and fixed to both ends.
  • the positive and negative electrode terminals 15 are connected to the positive electrode 11A of the electrode body 11 and the core body 31 of the negative electrode 11B arranged inside the outer can 12 via the current collector 14.
  • the sealing plate 13 is provided with a safety valve 34 that opens when the internal pressure rises to the set pressure.
  • the sealing plate 13 is inserted into the opening of the outer can 12 with the outer shape being substantially equal to the inner shape of the opening of the outer can 12, and irradiated with a laser beam at the boundary with the outer can 12. Airtightly seal the opening.
  • the output terminal 17 is arranged on the upper surface of the sealing plate 13 via the terminal holder 16.
  • the output terminal 17 is electrically connected to the electrode terminal 15 via the connection lead 18.
  • the terminal holder 16 has a substantially triangular prism shape having an inclined surface, and a connection lead 18 to which the output terminal 17 is fixed is disposed at a fixed position of the electrode terminal 15.
  • the output terminal 17 shown in the figure is a set screw, and the screw portion of the set screw is passed through the connection lead 18 so as to protrude from the inclined surface of the terminal holder 16 in an inclined posture.
  • the terminal holder 16 is made of an insulating member such as plastic, and insulates the periphery of the output terminal 17 except for the protruding portion.
  • Electrode body 11 As shown in FIGS. 6 and 7, the electrode body 11 is formed such that the positive electrode 11A and the negative electrode 11B are spirally wound with the insulating layer 11C interposed therebetween, and then sandwiched between two press plates (not shown). The plate is pressed and pressed to a predetermined thickness so that the opposing surface is flat. The electrode body 11 pressed into a plate shape is inserted into the outer can 12 with its thickness being substantially equal to the inner width of the narrow surface 12B of the outer can 12. In the rectangular battery 1, the plate-like electrode body 11 is inserted into the outer can 12, and the sealing plate 13 is welded and fixed to the outer can 12, and then the electrolytic solution 30 is filled from the injection hole 33 provided in the sealing plate 13.
  • the prismatic battery 1 is provided with an insulating material between the inner surface of the metal outer can 12 and the electrode body 11 so that the conductive portion of the electrode body 11 and the current collector 14 are in contact with the outer can 12.
  • This insulating material can be realized by an insulating layer laminated on the electrode of the electrode body, an insulating cover laminated on the inner surface of the outer can, or an insulating layer coated on the inner surface of the outer can.
  • the positive electrode 11A and the negative electrode 11B used in the electrode body 11 in FIG. 6 are provided with a core body exposed portion 31y to which the active material 32 is not applied on one side of the elongated strip-shaped core body 31, and the active material in a region excluding the one side portion. 32 is applied.
  • the core body 31 is a conductive metal foil.
  • the core body exposed portion 31y is disposed on the opposite side, and the region where the active material 32 is applied is opposed to the region where the active material 32 is applied.
  • 11C microporous membranes are stacked and wound into a spiral as shown in FIG. The wound electrode body 11 is then pressed into a plate shape having a predetermined thickness.
  • the active material application region 11X is formed between the core body exposed regions 11Y with both side portions as the core body exposed regions 11Y.
  • the core body exposed regions 11Y on both sides of the electrode body 11 expose the core body 31 of the positive electrode 11A on one side and the core body 31 of the negative electrode 11B on the other side.
  • the core exposed portions 31y of the positive electrode 11A are stacked together without interposing the insulating layer 11C and connected to the current collector 14 on the positive electrode side, and the core exposed portions 31y of the negative electrode 11B are also stacked without interposing the insulating layer 11C.
  • the positive electrode side current collector 14 and the negative electrode side current collector 14 are connected to the positive electrode terminal 15 and the negative electrode terminal 15 fixed to the sealing plate 13 by a method such as welding.
  • the above electrode body 11 is inserted into the outer can 12 so that the core exposed areas 11Y on both sides are arranged on both sides of the outer can 12, that is, on both sides of the wide flat surface 12A.
  • the electrode body 11 is inserted into the outer can 12, and the sealing plate 13 is disposed at the opening of the outer can 12. This is because the sealing plate 13 is connected to the electrode body 11 via the current collector 14.
  • a predetermined gap is provided between the electrode body 11 and the sealing plate 13.
  • the sealing plate 13 disposed in the opening of the outer can 12 is welded to the opening of the outer can 12 by a method such as laser welding. Thereafter, the outer can 12 is filled with the electrolytic solution from the injection hole 33 of the sealing plate 13, and the injection hole 33 is airtightly closed.
  • the prismatic battery 1 described above has an active material non-contact region in which both side portions and upper and lower portions of the wide plane 12 ⁇ / b> A of the outer can 12 do not contact the active material application region 11 ⁇ / b> X of the electrode body 11.
  • a region excluding both sides and upper and lower portions of the wide plane 12A is defined as an active material contact region 12X that contacts the active material application region 11X of the electrode body 11.
  • the separator 2 sandwiched between the prismatic batteries 1 is manufactured by molding an insulating plastic.
  • the separator 2 shown in the front view of FIG. 10 has a quadrangular outer shape that is substantially equal to the outer shape of the prismatic battery 1, and guide walls 22 are provided at the corners of the four corners. Yes.
  • the guide wall 22 is L-shaped, and a corner portion of the prismatic battery 1 is disposed on the inner side, and the prismatic battery 1 is disposed at a fixed position.
  • the separator 2 in FIG. 10 has an active material that presses the active material contact region 12X of the outer can 12 more strongly than the active material non-contact region 12Y in the center portion (indicated by cross hatching in the figure) excluding both side portions and upper and lower portions.
  • the substance pressing part 2X is provided.
  • the battery stack 9 is fixed by the fixing member 3 in a pressurized state.
  • the both sides and the upper and lower parts of the wide plane 12A are the active material non-contact areas 12Y that do not contact the active material application area 11X of the electrode body 11, so that the separator 2 of FIGS.
  • the active material pressing part 2X is provided in a region excluding both side parts and the upper and lower parts, and the non-pressing part 2Y that does not strongly press the wide plane 12A of the outer can 12 is provided on both side parts and the upper and lower parts.
  • the separator 2 of the outer can 12 is provided with a notch recess 29 in a portion facing the active material non-contact region 12Y on both sides of the wide plane 12A to form a non-pressing portion 2Y.
  • a region facing the upper and lower portions of the wide flat surface 12A is made lower than the active material pressing portion 2X to be a non-pressing portion 2Y.
  • the boundary line between the cutout recess 29 of the non-pressing part 2Y and the active material pressing part 2X is located at the boundary line between the active material application area 11X and the core body exposure area 11Y of the electrode body 11, and the active material pressing part 2X
  • the active material contact area 12X of the outer can 12 is pressed.
  • the separator 2 projects the active material pressing portion 2X more than the non-pressing portion 2Y provided on the upper and lower portions, and strongly presses the active material contact region 12X of the outer can 12. .
  • the active material pressing part 2X protrudes 0.2 mm from the non-pressing part 2Y, for example, and strongly presses the active material application region 11X of the outer can 12.
  • the active material pressing part 2X is 0.1 mm or more than the non-pressing part 2Y and protrudes to 0.5 mm or less, so that the active material application region 11X of the outer can 12 can be pressed strongly.
  • the separator 2 is sandwiched between the rectangular batteries 1 and presses the active material contact region 12X of the outer can 12.
  • the separator 2 is provided with the active material pressing portions 2X protruding on both surfaces, and presses the active material contact region 12X of the rectangular battery 1 stacked on both surfaces. Since the separator 2 is provided with the active material pressing portion 2X at the same position on both sides, the portion provided with the active material pressing portion 2X is thicker than the non-pressing portion 2Y.
  • the separator 2 can forcibly cool the rectangular battery 1 by forcibly blowing cooling air into the cooling gap 6 with a cooling mechanism (not shown).
  • a cooling mechanism not shown
  • the separator 2 shown in FIGS. 11 to 13 is provided with a plurality of rows of cooling grooves 21 alternately on both sides, and the bottom plate 28 of the cooling groove 21 is placed on the exterior of the rectangular battery 1 on the opposite side. It is in close contact with the can 12.
  • the height of the opposing walls 27 on both sides of the cooling groove 21 is the substantial thickness (D) of the active material pressing portion 2X.
  • this separator 2 controls the amount of protrusion from the non-pressing portion 2Y by adjusting the substantial thickness (D) of the active material pressing portion 2X with the height of the facing wall.
  • the separator 2 described above forcibly blows cooling air into the cooling gap 6 to forcibly cool the prismatic battery 1, but the separator does not necessarily need to be provided with a cooling gap, and the active material pressing portion is planar or substantially planar.
  • the active material contact area of the outer can be pressed.
  • the separator can press the center part of the active material contact area of an exterior can more strongly, making the center part of the active material pressing part protrude highly.
  • a battery stack 9 formed by stacking a plurality of prismatic batteries 1 and separators 2 is fastened in the stacking direction via a fixing member 3.
  • the fixing member 3 shown in FIG. 1 and FIG. 2 has an end plate 4 disposed on both end faces of the battery stack 9 and an end connected to the end plate 4 to put the stacked square battery 1 in a pressurized state. It consists of the connecting tool 5 fixed.
  • the battery stack 9 is fixed by pressing the stacked rectangular battery 1 in a direction perpendicular to the wide flat surface 12 ⁇ / b> A by connecting a pair of end plates 4 arranged at both end faces thereof with a connector 5.
  • the fixing member is not necessarily specified as the end plate and the coupling tool. Any other structure that can fasten the battery stack in the stacking direction can be used as the fixing member.
  • End plate 4 The end plate 4 is arrange
  • the end plate 4 is a quadrangle having substantially the same shape and dimensions as the outer shape of the prismatic battery 1, and the stacked battery stack 9 is sandwiched from both end faces.
  • the end plate 4 is made of a hard plastic or a metal such as aluminum or an alloy thereof.
  • the plastic end plate 4 is directly laminated on the prismatic battery 1, and the metal end plate is laminated on the prismatic battery 1 via an insulating material.
  • the connector 5 is fixed to the end plates 4 arranged on both end faces of the battery stack 9 and fastens the battery stack 9 in the stacking direction via the end plates 4. 1 and 2 is extended in the stacking direction of the battery stack 9, and both ends are fixed to the pair of end plates 4 to fasten the battery stack 9 in the stacking direction.
  • the connector 5 shown in the figure is arranged to face both side surfaces of the battery stack 9.
  • surfaces of the battery laminated body 9 can fasten a some square battery in a lamination direction more reliably.
  • the connector can be disposed on the top surface and the bottom surface, or can be disposed only on the top surface and the bottom surface without being disposed on both side surfaces.
  • the connector 5 is manufactured by processing a metal plate having a predetermined thickness into a predetermined width.
  • the connection tool 5 connects an end part to the end plate 4, connects a pair of end plates 4, and holds the prismatic battery 1 in a compressed state therebetween.
  • the connector 5 fixes the pair of end plates 4 to a predetermined size, and fixes the rectangular battery 1 stacked between them to a predetermined compressed state. If the connector 5 is extended by the expansion pressure of the prismatic battery 1, the expansion of the prismatic battery 1 cannot be prevented. Therefore, the connector 5 is manufactured by processing a metal plate having a strength that does not extend due to the expansion pressure of the rectangular battery 1, for example, a stainless steel plate such as SUS304 or a metal plate such as a steel plate into a width and thickness having sufficient strength.
  • the connector can also process the metal plate into a groove shape. Since the connector having this shape can increase the bending strength, it has a feature that the rectangular battery to be stacked can be firmly fixed to a predetermined compression state while narrowing the width.
  • the connector 5 is provided with a bent portion 5 ⁇ / b> A at the end, and connects the bent portion 5 ⁇ / b> A to the end plate 4.
  • the bent portion 5A is provided with a through hole of a set screw 19 and is fixed to the end plate 4 via a set screw 19 inserted therein.
  • the above battery system is assembled in the following steps.
  • the battery stack 9 is formed by sandwiching the separator 2 between the plurality of rectangular batteries 1.
  • the end plates 4 are disposed at both ends of the battery stack 9, and the battery stack 9 is pressurized with a predetermined pressure via the end plates 4 and held in a pressurized state.
  • the separator 2 presses the active material contact area 12X of the prismatic battery 1 outer can 12 more strongly than the active material non-contact area 12Y with the active material pressing portion 2X. That is, the active material contact region 12X of the outer can 12 is pressed with a predetermined pressure without strongly pressing the active material non-contact region 12Y.
  • the active material application region 11X contacts.
  • the active material contact area 12X of the outer can 12 can be pressed by the active material pressing portion 2X of the separator 2 to prevent the active material application area 11X from expanding.
  • the expansion of the active material application region 11X of the electrode body 11 is effective at the active material pressing portion 2X of the separator 2.
  • the expansion of the active material application region 11X of the electrode body 11 can be reliably prevented without damaging the upper and lower parts and both sides of the outer can 12 that are easily damaged.
  • the above battery system can be used as an in-vehicle power source.
  • a vehicle equipped with a battery system an electric vehicle such as a hybrid vehicle or a plug-in hybrid vehicle that runs with both an engine and a motor, or an electric vehicle that runs only with a motor can be used and used as a power source for these vehicles. .
  • FIG. 16 shows an example in which a battery system is mounted on a hybrid vehicle that runs with both an engine and a motor.
  • a vehicle HV equipped with the battery system shown in this figure has an engine 96 and a running motor 93 that run the vehicle HV, a battery system 100 that supplies power to the motor 93, and power generation that charges a square battery of the battery system 100.
  • the battery system 100 is connected to a motor 93 and a generator 94 via a DC / AC inverter 95.
  • the vehicle HV travels by both the motor 93 and the engine 96 while charging and discharging the square battery of the battery system 100.
  • the motor 93 is driven to drive the vehicle when the engine efficiency is low, for example, during acceleration or low-speed driving.
  • the motor 93 is driven by power supplied from the battery system 100.
  • the generator 94 is driven by the engine 96 or is driven by regenerative braking when the vehicle is braked, and charges the prismatic battery of the battery system 100.
  • FIG. 17 shows an example in which a battery system is mounted on an electric vehicle that runs only with a motor.
  • a vehicle EV equipped with the battery system shown in this figure includes a traveling motor 93 that travels the vehicle EV, a battery system 100 that supplies electric power to the motor 93, and a generator that charges a rectangular battery of the battery system 100.
  • 94 a vehicle main body 90 on which the motor 93, the battery system 100, and the generator 94 are mounted, and a wheel 97 that is driven by the motor 93 and causes the vehicle main body 90 to travel.
  • the battery system 100 is connected to a motor 93 and a generator 94 via a DC / AC inverter 95.
  • the motor 93 is driven by power supplied from the battery system 100.
  • the generator 94 is driven by energy when regeneratively braking the vehicle EV, and charges the square battery of the battery system 100.
  • this battery system can be used not only as a power source for a mobile body but also as a stationary power storage facility.
  • a power source for home and factory use a power supply system that is charged with sunlight or midnight power and discharged when necessary, or a streetlight power supply that charges sunlight during the day and discharges at night, or during a power outage It can also be used as a backup power source for driving signals.
  • FIG. The battery system 100 shown in this figure forms a battery unit 82 by connecting a plurality of battery blocks 81 in a unit form. Each battery block 81 has a plurality of prismatic batteries 1 connected in series and / or in parallel.
  • Each battery block 81 is controlled by a power supply controller 84.
  • the battery system 100 drives the load LD after charging the battery unit 82 with the charging power source CP. For this reason, the battery system 100 includes a charge mode and a discharge mode.
  • the load LD and the charging power source CP are connected to the battery system 100 via the discharging switch DS and the charging switch CS, respectively.
  • ON / OFF of the discharge switch DS and the charge switch CS is switched by the power supply controller 84 of the battery system 100.
  • the power controller 84 switches the charging switch CS to ON and the discharging switch DS to OFF to permit charging of the battery system 100 from the charging power source CP.
  • the power controller 84 turns off the charging switch CS and turns on the discharging switch DS to discharge.
  • the mode is switched and discharging from the battery system 100 to the load LD is permitted.
  • the charge switch CS can be turned on and the discharge switch DS can be turned on to supply power to the load LD and charge the battery system 100 simultaneously.
  • the load LD driven by the battery system 100 is connected to the battery system 100 via the discharge switch DS.
  • the power supply controller 84 switches the discharge switch DS to ON, connects to the load LD, and drives the load LD with the power from the battery system 100.
  • the discharge switch DS a switching element such as an FET can be used. ON / OFF of the discharge switch DS is controlled by the power supply controller 84 of the battery system 100.
  • the power controller 84 also includes a communication interface for communicating with external devices. In the example of FIG. 18, the host device HT is connected according to an existing communication protocol such as UART or RS-232c. Further, if necessary, a user interface for the user to operate the power supply system can be provided.
  • Each battery block 81 includes a signal terminal and a power supply terminal.
  • the signal terminals include an input / output terminal DI, an abnormal output terminal DA, and a connection terminal DO.
  • the input / output terminal DI is a terminal for inputting / outputting a signal from the other battery block 81 or the power supply controller 84
  • the connection terminal DO is a terminal for inputting / outputting a signal to / from the other battery block 81.
  • the abnormality output terminal DA is a terminal for outputting abnormality of the battery block 81 to the outside.
  • the power supply terminal is a terminal for connecting the battery blocks 81 in series and in parallel.
  • the battery units 82 are connected to the output line OL via the parallel connection switch 85 and are connected in parallel to each other.
  • the battery system of the present invention can be used stably for a long period of time because it prevents adverse effects due to expansion of the electrode body of the rectangular battery that occurs over time due to repeated large current and charge / discharge, and damage and deformation of the outer can. It is optimally used as a battery for driving electric vehicles, for which life characteristics are important, and a battery for storing natural energy and midnight power.
  • Electrode body 11A Positive electrode BR> @ 11B: Negative electrode 11C: Insulating layer 11X: Active material application area 11Y: Core exposed area 12 ... Exterior can 12A: Wide plane 12B: Narrow surface 12X: Active material contact area 12Y: Active Substance non-contact region 13 ... Sealing plate 14 ... Current collector 15 ... Electrode terminal 16 ... Terminal holder 17 ... Output terminal 18 ... Connection lead 19 ... Set screw 21 ...
  • Cooling groove 22 ... Guide wall 27 ... Opposite wall 28 ... Bottom plate 29 ... Notch recess 31 ... Core 31y ... Core exposed part 32 ... Active material 33 ... Injection hole 34 ... Safety valve 81 ... Battery block 82 ... Battery unit 84 ... Power supply controller 85 ... Parallel connection switch 90 ... Vehicle main body 93 ... Motor 94 ... Generator 95 ... DC / AC inverter 96 ... Engine 97 ... Wheel EV ... Vehicle HV ... Vehicle LD ... Load CP ... Power supply for charging DS ... Discharge switch CS ... Charge switch OL ... Output line HT ... Host equipment DI ... Input / output terminal DA ... Abnormal output terminal DO ... Connection terminal

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Abstract

[Problème] L'invention vise à stabiliser efficacement et à prévenir l'expansion d'une cellule rectangulaire tout en évitant d'endommager l'enceinte extérieure de la cellule rectangulaire. [Solution] L'invention concerne un système de batterie qui comporte : une pluralité de cellules rectangulaires (1) obtenues en logeant un corps d'électrodes (11) dans une enceinte extérieure (12) rectangulaire et scellant l'enceinte de manière étanche à l'air, le corps d'électrodes (11) étant obtenu en stratifiant ou enveloppant une électrode positive (11A) et une électrode négative (11B) séparées par une couche d'isolation (11C) ; des séparateurs (2) agencés entre les cellules rectangulaires (1) ; et un organe de verrouillage (3) permettant de comprimer un empilement de cellules (9) obtenu en stratifiant alternativement les cellules rectangulaires (1) et les séparateurs (2) dans la direction de stratification pour verrouiller l'empilement dans un état sous pression. L'enceinte extérieure (12) des cellules rectangulaires (1) a une zone de contact de substance active (12X) dans laquelle la surface intérieure est en contact avec la zone d'application de substance active (11X) du corps d'électrodes (11), et une zone sans contact de substance active (12Y) dans laquelle la surface intérieure n'est pas en contact avec la zone d'application de substance active (11X) du corps d'électrodes (11). Quand l'organe de verrouillage (3) appuie sur l'empilement de cellules (9), les séparateurs (2) ont une partie de pression de substance active (2X) permettant de presser sur la zone de contact de substance active (12X) de l'enceinte extérieure plus fortement que sur une zone sans contact de substance active (12Y).
PCT/JP2013/067810 2012-07-13 2013-06-28 Système de batterie, véhicule comportant le système de batterie, et dispositif accumulateur WO2014010439A1 (fr)

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JP2015207537A (ja) * 2014-04-23 2015-11-19 トヨタ自動車株式会社 蓄電装置
CN105702890A (zh) * 2014-12-12 2016-06-22 株式会社杰士汤浅国际 蓄电装置
CN106207211A (zh) * 2016-08-30 2016-12-07 苏州博众精工科技有限公司 一种绝缘片折弯包裹装置及其折弯包裹方法
RU2648243C1 (ru) * 2016-01-12 2018-03-23 Тойота Дзидося Кабусики Кайся Аккумуляторная батарея
WO2018101079A1 (fr) * 2016-11-30 2018-06-07 パナソニック株式会社 Cellule secondaire et bloc de cellules
WO2019003772A1 (fr) * 2017-06-26 2019-01-03 パナソニックＩｐマネジメント株式会社 Dispositif de stockage d'énergie
CN113169390A (zh) * 2018-11-29 2021-07-23 松下知识产权经营株式会社 蓄电模块
CN116799391A (zh) * 2023-08-29 2023-09-22 深圳海辰储能控制技术有限公司 下塑胶、储能装置及用电设备

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JP2009110833A (ja) * 2007-10-31 2009-05-21 Sanyo Electric Co Ltd 電池パック及び電池パック用セパレータ
WO2011158341A1 (fr) * 2010-06-16 2011-12-22 トヨタ自動車株式会社 Ensemble de batterie secondaire
JP2013109858A (ja) * 2011-11-17 2013-06-06 Gs Yuasa Corp 電池
WO2013098939A1 (fr) * 2011-12-27 2013-07-04 トヨタ自動車株式会社 Ensemble batterie secondaire

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JP2009110833A (ja) * 2007-10-31 2009-05-21 Sanyo Electric Co Ltd 電池パック及び電池パック用セパレータ
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015207537A (ja) * 2014-04-23 2015-11-19 トヨタ自動車株式会社 蓄電装置
CN105702890A (zh) * 2014-12-12 2016-06-22 株式会社杰士汤浅国际 蓄电装置
JP2016115486A (ja) * 2014-12-12 2016-06-23 株式会社Ｇｓユアサ 蓄電装置
CN105702890B (zh) * 2014-12-12 2020-07-28 株式会社杰士汤浅国际 蓄电装置
RU2648243C1 (ru) * 2016-01-12 2018-03-23 Тойота Дзидося Кабусики Кайся Аккумуляторная батарея
CN106207211A (zh) * 2016-08-30 2016-12-07 苏州博众精工科技有限公司 一种绝缘片折弯包裹装置及其折弯包裹方法
CN106207211B (zh) * 2016-08-30 2019-02-01 博众精工科技股份有限公司 一种绝缘片折弯包裹装置及其折弯包裹方法
WO2018101079A1 (fr) * 2016-11-30 2018-06-07 パナソニック株式会社 Cellule secondaire et bloc de cellules
WO2019003772A1 (fr) * 2017-06-26 2019-01-03 パナソニックＩｐマネジメント株式会社 Dispositif de stockage d'énergie
CN113169390A (zh) * 2018-11-29 2021-07-23 松下知识产权经营株式会社 蓄电模块
CN116799391A (zh) * 2023-08-29 2023-09-22 深圳海辰储能控制技术有限公司 下塑胶、储能装置及用电设备
CN116799391B (zh) * 2023-08-29 2023-12-26 深圳海辰储能控制技术有限公司 下塑胶、储能装置及用电设备

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