Coolant, method of enclosing coolant, and cooling system
US7344655B1 · kind B1 · utility
8Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2000 |
| Grant date | Mar 18, 2008 |
| Priority date | — |
| Expiry date | Sep 27, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A coolant used for cooling down a stack of fuel cells includes: a solution mixture of water and a glycol as base material; and a rust-preventive additive that functions to keep an electric conductivity of the coolant at a low level and to maintain a hydrogen ion exponent of the coolant in a substantially neutral level. The rust-preventive agent includes at least one of an alkaline ethanolamine additive, such as triethanolamine, diethanolamine, or monoethanolamine, and an acidic additive selected among the group consisting of triazole compounds, phosphoric acid compounds, and organophosphoric acid compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.