一种氢燃料电池电堆
By using copper busbar gaskets and sealing caps in hydrogen fuel cell stacks, the problems of high cost and low efficiency of copper busbar sealing are solved, achieving low-cost, high-efficiency sealing and detachable connection, suitable for various application scenarios, reducing the overall cost of the stack and improving the reliability of the seal.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG FENERGY TECH CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-17
AI Technical Summary
Existing copper busbar sealing methods for hydrogen fuel cell stacks suffer from high costs, low efficiency, and non-removable nature, or unstable sealing performance that may damage the stack.
The design employs a copper busbar sealing gasket and sealing cap. Pre-tightening force is provided by the cooperation of the pressure protrusion and the groove, enabling a detachable connection between the copper busbar and the top cover to ensure a sealing effect. A copper busbar sealing gasket made of silicone is used to fill the gap.
It achieves low-cost and high-efficiency sealing, ensures that the copper busbar is removable without damaging the fuel cell stack, is suitable for various application scenarios, reduces the overall cost of the fuel cell stack, and improves the reliability of the seal.
Smart Images
Figure CN224519896U_ABST
Abstract
Claims
1. A hydrogen fuel cell stack, characterized by: include: The stack body; A top cover is connected to the top of the fuel cell stack body; the top cover has mounting holes; the upper surface of the top cover has mounting grooves and a first sealing groove; At least two copper busbars, one end of which is connected to the fuel cell body and the other end extends through the mounting hole to the outside of the top cover; A copper busbar sealing cap is installed in the mounting groove; The lower surface of the copper busbar sealing cover is provided with a pressure protrusion; the copper busbar sealing cover is provided with a first clearance groove for avoiding the copper busbar; A copper busbar sealing gasket is installed in the first sealing groove; the upper surface of the copper busbar sealing gasket is provided with a groove that mates with the pressure-applying protrusion; the copper busbar sealing gasket is provided with a second clearance groove for avoiding the copper busbar; A pressing assembly is used to detachably connect the copper busbar sealing cover and the upper cover; the pressing assembly is used to drive the copper busbar sealing cover to move downward to compress the copper busbar sealing gasket.
2. The hydrogen fuel cell stack of claim 1, wherein: The sidewalls of the pressure-applying protrusion are inclined outwards from bottom to top.
3. The hydrogen fuel cell stack of claim 1, wherein: The pressing assembly includes a locking screw with its axis extending vertically; the upper cover and the copper busbar sealing cover are connected by the locking screw.
4. The hydrogen fuel cell stack of claim 3, wherein: At the location where the mounting groove is provided, the top of the upper cover is provided with a first threaded hole; the copper busbar sealing cover is provided with a second threaded hole that penetrates its thickness; the first threaded hole and the second threaded hole are connected by a locking screw.
5. The hydrogen fuel cell stack of claim 4, wherein: The top of the second threaded hole is provided with a countersunk hole coaxially connected to it, and the countersunk hole communicates with the second threaded hole; the head of the locking screw is located in the countersunk hole.
6. The hydrogen fuel cell stack of claim 3, wherein: There are multiple pressing components, and the multiple pressing components are arranged in a circle along the edge of the copper busbar sealing gasket.
7. The hydrogen fuel cell stack of claim 1, wherein: The copper busbar sealing gasket is divided into two sub-sealing gaskets; each sub-sealing gasket is provided in a one-to-one correspondence with the copper busbar; each sub-sealing gasket is provided with a first sealing groove.
8. The hydrogen fuel cell stack of claim 1, wherein: The gap between the first clearance groove and the copper busbar is 0.1~0.2mm.
9. The hydrogen fuel cell stack of claim 1, wherein: The copper busbar sealing gasket is made of silicone.
10. The hydrogen fuel cell stack of claim 1, wherein: The upper surface of the copper busbar sealing cover is provided with a second sealing groove, and a sealing strip is installed in the second sealing groove.