A circulating water temperature control device for a fuel cell stack test bench

CN116706127BActive Publication Date: 2026-07-07SHANGHAI SHENLI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI SHENLI TECH CO LTD
Filing Date
2023-02-23
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing fuel cell stack test benches have a wide range of water flow rates in the low-power range, making temperature control difficult, resulting in slow response and uncontrollability. Furthermore, existing solutions may damage the water pump, leading to high testing costs and inflexible equipment use.

Method used

It adopts a double-layer insulated pipe diversion circulation water circuit. The inner pipe connects to the test object, and the outer pipe returns to the water tank. The temperature is regulated by heat exchange between the inner and outer liquids. It is equipped with a proportional valve and sensor monitoring to prevent overshoot damage, and the water pump is controlled by fixed frequency.

Benefits of technology

It achieves rapid temperature control, widens the water flow adjustment range, reduces testing costs, avoids water pump damage, and improves the flexibility and reliability of the equipment.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN116706127B_ABST
    Figure CN116706127B_ABST
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Abstract

The application relates to a circulating water temperature control device of a fuel cell stack test bench, which comprises a water tank, a water pump, a heat exchanger and a measured part connected in sequence through pipelines and constituting a circulation, a double-layer insulation pipe with an outer pipe and an inner pipe is arranged between the heat exchanger and the measured part, two branches are led out from the outlet of the heat exchanger and divided into a first branch and a second branch, the first branch is connected with the measured part through the inner pipe of the double-layer insulation pipe, a second proportional valve is arranged on the first branch, and the second branch directly returns to connect the water tank through the outer pipe of the double-layer insulation pipe. Compared with the prior art, the double-layer insulation pipe is used to realize heat conversion between the outer pipe and the inner pipe to achieve the insulation effect, and the water flow regulation interval is effectively widened.
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