Classifications

• • 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
  • H01M10/05—Accumulators with non-aqueous electrolyte
  • H01M10/052—Li-accumulators
  • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• • 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
  • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
  • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/30—Arrangements for facilitating escape of gases
  • H01M50/394—Gas-pervious parts or elements
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/50—Current conducting connections for cells or batteries
  • H01M50/572—Means for preventing undesired use or discharge
  • H01M50/574—Devices or arrangements for the interruption of current
  • H01M50/578—Devices or arrangements for the interruption of current in response to pressure
• • 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
  • H01M50/574—Devices or arrangements for the interruption of current
  • H01M50/579—Devices or arrangements for the interruption of current in response to shock
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M2200/00—Safety devices for primary or secondary batteries
• • 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

• compartmentalized enclosure defines a shared atmosphere across first/second compartments
• the disclosed compartmentalized enclosure may advantageously include at least one pressure disconnect device/feature in communication with the shared atmosphere.
• a single pressure disconnect device/feature may be provided that is effective in providing pressure disconnect functionality for both first and second compartments.
• Figure 2 is a top down view of a plurality of support member configurations according to this disclosure
• the anodes/cathodes of the core members are also directly exposed to the shared environment region 128.
• the elimination of the canned core members reduce manufacturing costs, it also increases safety.
• the gasses expelled are able to occupy the shared environment region 128, which provides significantly more volume than would be available in a typical individually 'canned' core member.
• the canned core member pressure build up an explosion is more likely than with the present disclosure, which provides a greater volume for the gases to occupy and therefore reduced pressure build up.
• a can typically ruptures at much higher pressures than the structure of the disclosure, resulting in a milder failure mode with the present disclosure.
• cavities 122 can be simultaneously filled with electrolyte and then simultaneously formed and graded for capacity during the continued manufacturing process.
• the forming process consist of charging the cell to a constant voltage, typically 4.2V and then letting the cell rest at this potential for 12 -48 hours.
• the capacity grading takes place during a charge/discharge process, where the cell is fully discharged to a lower voltage, such as 2.5V, then charged to highest voltage, typically in a range of 4.2-4.5V, and subsequently discharged again, upon which the capacity is recorded.
• Multiple charge/discharge cycles may be needed to obtain an accurate capacity grading, due to inefficiencies in the charge/discharge process.
• the cavity liner enables a precise and consistent amount of electrolyte to be introduced to each core member, due to its snug fit with the core.
• One way to accomplish the filling is with through holes in enclosure 116 which can then be filled and sealed after the electrolyte has been introduced to the cavities and processed.
• a jelly roll type core member having about 3 Ah capacity will need about 4-8g of electrolyte, depending on density and surrounding porous material. Electrolyte filling is done so that entire jelly roll is equally wetted throughout the roll with no dry areas allowed. It is preferred that each core member has the equivalent amount of electrolyte from core to core, with a variation within 0.5g, and even more preferred within O.lg and yet even more preferred within 0.05g.
• enclosure 702 included within enclosure 702 is a set of electrically conductive tabs (not shown) connected to the cathodes of each core member 102 and a set of electrically conductive tabs (not shown) connected to the anodes of each core member 102. Tabs (not shown) are also connected to cathode bus bar (not shown) and tabs (not shown) are connected to anode bus bar (not shown). The cathode tabs (not shown) and anode tabs (not shown) are welded to bus bars (not shown) using spot welding or laser welding techniques. Bus bars (not shown) are interconnected to positive terminal (not shown) and negative terminal (not shown), respectively, on the exterior of module enclosure 702.
• a pressure disconnect device advantageously electrically isolates electrochemical units 102 associated with the lithium ion battery in response to a build-up of pressure within enclosure 702 that exceeds a predetermined pressure threshold.
• the PDD includes a deflectable dome structure and a fuse assembly positioned on an external face of enclosure 702 that is adapted, in response to a pressure build-up within enclosure 702 beyond a threshold pressure level, to electrically isolate lithium ion battery components within enclosure 702. Attached to the fuse assembly is a structural feature that is aligned with the center line of the deflectable dome.
• overcharge electrical disconnect feature advantageously electrically isolates electrochemical units 102 associated with the lithium ion battery in response to a build-up of pressure within enclosure 702 that exceeds a predetermined pressure threshold.
• the overcharge electrical disconnect feature leverages the known characteristics of enclosure 702, i.e., battery case expansion in response to an increase in internal pressure, to disconnect electrochemical units 102 from enclosure 702.
• Applicant’s concurrently filed provisional patent application entitled“Overcharge Electrical Disconnect Feature” discloses exemplary embodiments thereof, the content of which is hereby incorporated by reference.
• Blanket 804 generally features flow characteristics that promote axial gas and fluid flow through blanket 804, but substantially reduces lateral (e.g., side-to-side) flow within blanket 804. Therefore, particulates associated with such gas/fluid flow are forced through the body of blanket 804 and into the shared atmosphere of enclosure 116, 616, 702 (or individual compartmentalized region 707). To the extent an applicable threshold pressure is reached within the shared atmosphere, the particulate-containing gas/fluid is vented from the enclosure.
• enclosure 116, 616, 702 may be configured with an egg box shaped wall 900, such that upon mechanical impact on the enclosure, the MC battery can be short circuited externally of the enclosure.
• Egg box shaped portion 902 of the wall 900 made out of aluminum, contacts a plate of non conductive material 904, made of polyethylene plastic (prior to impact).
• a second plate 906, which is made out of aluminum or other conductive material, is located below the plastic plate 904.
• the egg box shaped material 902 is connected to either the negative or the positive pole of the MC battery and the other conductive plate 906 is connected to the opposite pole.
• this fuse arrangement may limit the amount of current that is transferred to the internal short by shutting of the malfunctioning core to the other parallel cores.
• the disclosed clamshell components may be advantageously joined around one or more pre-assembled support members that contain electrochemical units, as disclosed herein.
• Plate 1114 may further include features (e.g., grooves) that capture side wall component 1102.
• the compounds A-M blended as two or more compounds into high voltage cathodes can preferably be coated with a surface modifier.
• a surface modifier it is preferred, although not necessary, that each compound is coated with the same surface modifier.
• the surface modifier helps increase first cycle efficiency of the cathode mixture and rate capability. Also, useful life is improved with applying the surface modifying material.
• Examples of surface modifiers are AI2O3, Nb Os, ZrCT, ZnO, MgO, TiCT, metal fluorides such as AIF3, metal phosphates AIPO4 and C0PO4.
• Such surface modifying compounds have been described in the literature earlier[J. Liu et al, J. of Materials Chemistry 20 (2010) 3961 - 3967; ST Myung et al., Chemistry of Materials 17 (2005) 3695-3704; S.T. Myung et al., J. of Physical Chemistry C 11 1 (2007) 4061-4067; ST Myung et al., J. of Physical Chemistry C 1 154 (2010) 4710-4718; BC Park et al, J. of Power Sources 178 (2008) 826-831 ; J.
• the anode is prepared similarly, but about 94-96% anode active material, in case of graphite, is typically used, while PVDF binder is at 4%. Sometimes SBR binder is used for cathode mixed with CMC and for that type of binder higher relative amounts of anode active materials at about 98% can typically be used. For anode, carbon black can sometimes be used to increase rate capability. Anode is coated on copper foil of about 10 micrometer.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Secondary Cells (AREA)
• Connection Of Batteries Or Terminals (AREA)
• Gas Exhaust Devices For Batteries (AREA)

Applications Claiming Priority (3)

Publications (2)

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• 2018
  • 2018-12-07 WO PCT/US2018/064479 patent/WO2019118295A2/en not_active Ceased
  • 2018-12-07 EP EP18888951.3A patent/EP3724903A4/de active Pending
  • 2018-12-07 AU AU2018385435A patent/AU2018385435B2/en active Active
  • 2018-12-07 CN CN201880089330.9A patent/CN111902901B/zh active Active

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