Composite battery separator

Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Separator – retainer or spacer insulating structure

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Details

429145, 429246, 429247, H07M 216

Patent

active

046649921

ABSTRACT:
A composite battery separator comprises a support element (10) having an open pore structure such as a ribbed lattice and at least one liquid permeable sheet (20,22) to distribute the compressive force evenly onto the surfaces of the layers (24, 26) of negative active material and positive active material. In a non-flooded battery cell the compressible, porous material (18), such as a glass mat which absorbs the electrolyte, is compressed into a major portion of the pores or openings (16) in the support element. The unfilled pores in the material (18) form a gas diffusion path as the channels (41) formed between adjacent ribs in the lattice element (30,36). Facing two lattice elements (30, 31) with acute angled cross-ribs (34, 38) facing each other prevents the elements from interlocking and distorting a porous, separator (42) disposed between the lattice elements.

REFERENCES:
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patent: 4055711 (1977-10-01), Ikari
patent: 4091183 (1978-05-01), Niggl
patent: 4217401 (1980-08-01), Pellegri et al.
patent: 4245013 (1981-01-01), Clegg et al.
patent: 4378414 (1983-03-01), Furukawa et al.
patent: 4400447 (1983-08-01), Gerenser et al.
patent: 4448862 (1984-05-01), Schulte et al.

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