Metal-halogen battery having reduced dendrite growth
First Claim
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1. A metal-halogen battery, comprising:
- (a) a housing;
(b) a positive electrode plate located within said housing;
(c) a negative electrode plate located within said housing in spaced relation with and confronting said positive plate;
(d) means for providing a continuous flow of electrolyte solution through said housing and past the confronting face of said negative plate; and
(e) means for maintaining uniform spacing between said plates, said means including(i) a main body located between said plates in a fixed position relative to said positive plate, and(ii) a plurality of electrically non-conductive, spaced projections, each of which extends out from said main body a distance sufficient to engage the confronting face of said negative plate at its free end, each of said projections having a cross-section which is wider at predetermined points between said engaging free end and main body than at its plate engaging free end.
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Abstract
A metal-halogen battery, specifically a zinc-bromine battery of the rechargeable type, is disclosed herein and includes a housing, spaced positive and negative electrode plates located within the housing and an arrangement for providing continuous flow of electrolyte solution through the housing between the plates. This battery also includes a network of electrically non-conductive projecting ribs which engage the negative electrode plate for providing a fixed spacing between the two plates but which, at the same time, are specifically designed to reduce dendrite growth.
28 Citations
7 Claims
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1. A metal-halogen battery, comprising:
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(a) a housing; (b) a positive electrode plate located within said housing; (c) a negative electrode plate located within said housing in spaced relation with and confronting said positive plate; (d) means for providing a continuous flow of electrolyte solution through said housing and past the confronting face of said negative plate; and (e) means for maintaining uniform spacing between said plates, said means including (i) a main body located between said plates in a fixed position relative to said positive plate, and (ii) a plurality of electrically non-conductive, spaced projections, each of which extends out from said main body a distance sufficient to engage the confronting face of said negative plate at its free end, each of said projections having a cross-section which is wider at predetermined points between said engaging free end and main body than at its plate engaging free end. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A metal-halogen battery, comprising:
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(a) a housing; (b) a positive electrode plate located within said housing; (c) a negative electrode plate located within said housing in spaced relation with and confronting said positive plate; (d) means for maintaining a fixed spacing between said plates, said space maintaining means including a plurality of electrically non-conductive, spaced projections normal to said negative plate and having free ends in engagement with the confronting face thereof, each of said projections having at least a segment which is spaced from its free end and which is wider in cross section than said free end such that the current density of the battery at said negative plate directly adjacent the plate engaging free end of each projection is sufficiently small to prevent dendrite growth at said free end regardless of the flow rate of said electrolyte solution thereat.
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Specification