Electrode assembly for bipolar battery

• US 4,022,952 A
• Filed: 12/19/1975
• Issued: 05/10/1977
• Est. Priority Date: 12/19/1975
• Status: Expired due to Term

• Current Assignee: United States Of America As Represented By The Secretary Of The Air Force
• Original Assignee: United States Of America As Represented By The Secretary Of The Air Force
• Inventors: Fritts, David H.
• Primary Examiner(s): LeFevour, C. F.
• Application Number:
  US05/642,524
• Time in Patent Office: 508 Days
• Field of Search: 136/10-12, 136/20, 136/30, 136/125, 136/130, 204/254, 204/268, 429/210
• US Class Current: 429/210
• CPC Class Codes: H01M 10/613 Cooling or keeping cold
• CPC Class Codes: H01M 10/654 located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
• CPC Class Codes: H01M 10/6555 arranged between the cells
• CPC Class Codes: H01M 2200/00 Safety devices for primary or secondary batteries
• CPC Class Codes: H01M 2200/10 Temperature sensitive devices
• CPC Class Codes: H01M 4/02 Electrodes composed of, or comprising, active material
• CPC Class Codes: H01M 6/48 with bipolar electrodes
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A bipolar electrode having, between active materials, a heat sink fabricated from a porous electrical and heat conductive material, such as sintered silver, and impregnating the porous material with a phase-change heat absorbent material having a high heat of fusion, such as beeswax, provides an electrode having a very large thermal capacity for a high discharge current density battery.

Claims

1. The improvement in a bipolar electrode having silver oxide positive active material and zinc negative active material for a pile type AgO-Zn-KOH bipolar battery, the said electrode improvement comprising:

a. a porous silver sheet;

b. a grid layer of silver metal attached in sealing relationship to each surface of the said porous sheet;

c. beeswax;

d. means for filling the said porous sheet with the said beeswax;

e. means for applying the said positive active material to one grid layer; and

f. means for applying the said negative active material to the other said grid layer.

2. The improvement in a bipolar electrode as claimed in claim 1, wherein the said porous silver sheet is sintered silver and polyethylene and the said positive and negative active materials are electrodeposited on the said grids.