Multi-cell lithium-ion batteries
First Claim
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1. A battery comprising:
- a container having a number of cell cavities;
a number of electrochemical assemblies, each electrochemical assembly enfolded, one of said number of electrochemical assemblies disposed in each one of said number of cell cavities;
wherein each electrochemical assembly comprises a substantially spirally wound electrochemical assembly; and
each one of said number of electrochemical assemblies comprising;
a positive electrode and a negative electrode; and
a separator material between the positive electrode and the negative electrode;
an electrolyte in each cell cavity from said number of cell cavities, said electrolyte comprising a lithium salt and a redox shuttle;
said electrolyte and positive and negative electrodes selected to, during battery operation, provide a predetermined voltage across each electrochemical assembly in each cell cavity;
said redox shuttle being selected to provide shuttle operations when voltage across each electrochemical assembly in each cell cavity reaches another predetermined voltage; and
a cover disposed on said container;
said cover being permanently attached to said container so as to form a hermetic seal between said cover and said container;
said cover forming a seal between each cell cavity;
wherein said substantially spirally wound electrochemical assembly has an inner surface and an outer surface, the inner surface defining a central space;
wherein the outer surface of said substantially spirally wound electrochemical assembly is inclined with respect to a center axis of said substantially spirally wound electrochemical assembly;
inclination constituting a taper, said taper being selected to be equal to a taper of walls of each cell cavity from the number of cell cavities;
wherein said central space is filled with a compliant material, said compliant material having elastic behavior;
wherein said compliant material is a flexible and inert polymer capable of applying a compressive pressure on the substantially spirally wound electrochemical assembly; and
wherein said flexible and inert polymer consists of polyisobutylene.
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Abstract
Lithium ion (Li-ion) multi-cell batteries in which the requirements for individual monitoring and controlling charging of each cell, the requirements for monitoring and controlling charge balancing and the effects of repeated charging and discharging are ameliorated are presented. In one or more embodiments, the multi-cell battery includes configuration material that substantially provides a moisture barrier.
21 Citations
15 Claims
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1. A battery comprising:
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a container having a number of cell cavities; a number of electrochemical assemblies, each electrochemical assembly enfolded, one of said number of electrochemical assemblies disposed in each one of said number of cell cavities;
wherein each electrochemical assembly comprises a substantially spirally wound electrochemical assembly; and
each one of said number of electrochemical assemblies comprising;a positive electrode and a negative electrode; and
a separator material between the positive electrode and the negative electrode;an electrolyte in each cell cavity from said number of cell cavities, said electrolyte comprising a lithium salt and a redox shuttle;
said electrolyte and positive and negative electrodes selected to, during battery operation, provide a predetermined voltage across each electrochemical assembly in each cell cavity;
said redox shuttle being selected to provide shuttle operations when voltage across each electrochemical assembly in each cell cavity reaches another predetermined voltage; anda cover disposed on said container;
said cover being permanently attached to said container so as to form a hermetic seal between said cover and said container;
said cover forming a seal between each cell cavity;wherein said substantially spirally wound electrochemical assembly has an inner surface and an outer surface, the inner surface defining a central space; wherein the outer surface of said substantially spirally wound electrochemical assembly is inclined with respect to a center axis of said substantially spirally wound electrochemical assembly;
inclination constituting a taper, said taper being selected to be equal to a taper of walls of each cell cavity from the number of cell cavities;wherein said central space is filled with a compliant material, said compliant material having elastic behavior; wherein said compliant material is a flexible and inert polymer capable of applying a compressive pressure on the substantially spirally wound electrochemical assembly; and wherein said flexible and inert polymer consists of polyisobutylene. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification