JPH0773058B2 - Fuel cell - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel cell, and more particularly to a laminated structure suitable for uniform distribution of a refrigerant into vertically divided stacks.

[Background of the Invention]

The conventional laminated structure has a structure in which one laminated battery main body is housed in one pressure vessel as described in JP-A-57-202065. However, from the viewpoint of increasing the stack capacity stored in one pressure vessel and evenly distributing the gas, a method of dividing the battery main body into a plurality has been adopted. The conventional structure of this division method is shown in FIG.
The battery main body 1 is divided into a plurality of parts as shown in the figure and fixed by upper and lower fastening members 2 and 3, which are independent of each other. Gas supply / discharge manifolds 4 are attached to the four sides of the battery body 1. A refrigerant inlet external conduit 6 disposed on the lower plate 5 joins with the refrigerant inlet internal conduit 7 and is connected to one of the manifolds 4 mounted on the four surfaces. Further, the refrigerant outlet / inlet external conduits 8b, 9b were lowered to the same side as the inlet conduit to allow the refrigerant to flow.

However, in this case, the head pressure of the battery in the upper part becomes larger, the even distribution of the refrigerant cannot be maintained, and a problem occurs during power generation.

[Object of the Invention]

An object of the present invention is to provide a battery main body piping structure that solves the even distribution of the refrigerant, which is the biggest problem of the split stack.

[Outline of Invention]

The present invention relates to a laminated battery formed by laminating a plurality of unit batteries and a cooler for cooling the unit batteries, a manifold for supplying and discharging gas to and from the batteries, and a refrigerant supply / discharge device connected to the inlet and outlet of the cooler, respectively. In a fuel cell in which a plurality of cell main bodies that are even conduits are stacked to form a stack, a common mother tube of an inlet that communicates with the lower part of the stack is connected in parallel with each of the cooling pipes on the inlet side, The cooling pipe on the outlet side is connected to a common mother pipe on the outlet side of the cooler, the common mother pipe on the outlet side is connected to the lower part of the stack, and the refrigerant of the cooler is a common mother pipe on the inlet side of the lower part of the stack. From the pipe to the common mother pipe on the outlet side of the lower part of the stack, and making a part of the common mother pipe on the outlet side equal to or higher than the stack height, and the total length of the conduits on the inlet side and the outlet side of the plurality of battery bodies. In real The features.

Example of Invention

An embodiment of the present invention will be described below with reference to FIG. First
FIG. 1 is a side view of a fuel cell pipe showing an embodiment of the present invention. The refrigerant inlet and outlet conduits 6 and 7 have the same structure as the conventional one, but the refrigerant outlet common mother pipe 8a is lifted to the upper side and piped to the opposite side, and is connected to the refrigerant outlet external conduit 9a to be divided into a plurality of parts. The head pressure of the battery body 1 was made equal so that the refrigerant could be easily evenly distributed. In this embodiment, the common mother pipe on the outlet side is provided at the top of the stack, but the same effect can be obtained by providing the common mother pipe on the inlet side at the top of the stack.

〔The invention's effect〕

According to the present invention, there is an effect that it is possible to easily solve the difference in the even distribution of the refrigerant caused by dividing the battery main body housed in one pressure container into a plurality of parts.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a fuel cell of the present invention, and FIG. 2 is a side view of a fuel cell showing a conventional structure. 1 ... Battery body, 2 ... upper clamp, 3 ... lower clamp, 4
...... Manifold, 5 ...... Lower plate, 6 …… Refrigerant inlet external conduit, 7 …… Refrigerant inlet internal conduit, 8a, 8b …… Refrigerant outlet internal conduit, 9a, 9b …… Refrigerant outlet external conduit, 10 ... Lower plate.

Claims (1)

[Claims] 1. A laminated battery in which a plurality of unit batteries and a cooler for cooling the unit batteries are laminated, a manifold for supplying and exhausting gas to and from the batteries, and a refrigerant supply connected to an inlet and an outlet of the cooler, respectively. In a fuel cell in which a stack of a plurality of cell bodies composed of exhaust pipes are stacked to form a stack, a common mother pipe on the inlet side that communicates with the lower portion of the stack is connected in parallel with each of the cooling pipes on the inlet side, Each of the outlet side cooling conduits is connected to a common mother tube on the outlet side of the cooler,
The common mother pipe on the outlet side is connected to the lower part of the stack, and the refrigerant of the cooler is circulated from the common mother pipe on the inlet side of the lower part of the stack to the common mother pipe on the outlet side of the lower part of the stack, A fuel cell, characterized in that a part of the common mother tube is made higher than the stack height, and the total length of the inlet-side and outlet-side conduits is made substantially equal by the plurality of cell bodies.