US4025697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for circulating electrolyte around multi-section batteries
Assignee: Energy Development Associates Inc
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Filing: 1975-10-29
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Granted: 1977-05-24
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Expires: 1995-10-29
Abstract
Abstract A two-stage electrolyte circulation system for a multi-cell battery in which a large pump distributes the electrolyte through hydraulically driven circulators to the individual cells.
Inventors
- 👤 Thomas G. Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:43
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/70; H01M50/77; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
An apparatus for circulating electrolyte in a multi-section battery having a plurality of electrically isolated cells comprising: a plurality of electrically isolated cells, pump means having an inlet and an outlet for forcing electrolyte through the cells of said battery, means between each of the individual cells of said battery and the outlet of said pump means for circulating said electrolyte in a closed loop through each of said individual cells, conduit means between the outlet of said pump means and said circulating means, and conduit means between each of said individual cells and the inlet to said pump means for recycling said electrolyte.
Claim 2
Independent Claim
104 words
An apparatus for circulating electrolyte in a multi-section battery having a plurality of electrically isolated cells comprising: a plurality of electrically isolated cells, pump means having an inlet and an outlet for forcing electrolyte through the cells of said battery, means between each of the individual cells of said battery and the outlet of said pump means for circulating said electrolyte in a closed loop through each of said individual cells, conduit means between the outlet of said pump means and said circulating means, and conduit means between each of said individual cells and the inlet to said pump means for recycling said electrolyte.
Claim 3
Dependent Claim
30 words
Apparatus in accordance with claim 1 wherein said closed loop includes said circulating means, a cell of said battery, and conduit means extending between said cell and said circulating means.
Claim 4
Dependent Claim
116 words
Apparatus in accordance with claim 2 wherein said circulating means includes a housing having an electrolyte inlet a hollow shaft in communication with said inlet an impeller rotatably mounted in said housing on said hollow shaft, said impeller including a hub mounted for rotation on said hollow shaft, a plurality of vanes extending radially from said hub, an electrolyte passage in each of said vanes communicating with the interior of said hollow shafts, and an electrolyte outlet, whereby electrolyte forced into said housing through said inlet will enter said hollow shaft and will flow through said electrolyte passageways in said vanes to cause rotation of said vanes to force electrolyte within said housing out said outlet.
Claim 5
Dependent Claim
66 words
Apparatus for circulating fluids around an electro-chemical battery comprising said battery and a two-stage pumping means, the first stage comprising a means for generating a relatively high pressure, low flow-rate of fluids to the second stage, the second stage comprising a means for generating a relatively low pressure, high flow rate of fluids to said battery, said second stage being hydraulically driven by said first stage.
Claim 6
Dependent Claim
66 words
Apparatus for circulating fluids around an electro-chemical battery comprising said battery and a two-stage pumping means, the first stage comprising a means for generating a relatively high pressure, low flow-rate of fluids to the second stage, the second stage comprising a means for generating a relatively low pressure, high flow rate of fluids to said battery, said second stage being hydraulically driven by said first stage.
Claim 7
Dependent Claim
44 words
Apparatus in accordance with claim 4 wherein said first stage pumping means comprises an electrolyte pump, and said second stage pumping means comprises an electrolyte circulator fed electrolyte by said pump and hydraulically driven by said electrolyte to force said electrolyte to said battery.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |