Power module assembly of electrochemical cells

• US 4,714,662 A
• Filed: 03/17/1987
• Issued: 12/22/1987
• Est. Priority Date: 05/12/1986
• Status: Expired due to Fees

• Current Assignee: Northrop Grumman Corporation
• Original Assignee: Gould, Inc. (Transdigm Group Incorporated)
• Inventors: Bennett, William R.
• Primary Examiner(s): Skapars, Anthony
• Application Number:
  US07/027,061
• Time in Patent Office: 280 Days
• Field of Search: 429/27, 429/67, 429/68, 429/72, 429/81, 429/113, 429/66, 429/14
• US Class Current: 429/403
• CPC Class Codes: H01M 10/0413 Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
• CPC Class Codes: H01M 10/0468 Compression means for stacks of electrodes and separators
• CPC Class Codes: H01M 12/065 with plate-like electrodes or stacks of plate-like electrodes
• CPC Class Codes: H01M 6/46 of flat cells
• CPC Class Codes: H01M 6/48 with bipolar electrodes
• CPC Class Codes: H01M 6/50 Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A power module of the type including a plurality of power cells arranged in a longitudinal stacked relation. Each power cell includes a frame, a gas-consuming cathode supported at one end of the frame and a consumable anode supported intermediate the ends of the frame by a flexible diaphragm spanning the frame. The diaphragm divides the frame into a chamber for the introduction thereinto of an electrolyte between the anode and the cathode, and an expansion chamber on the opposite side of the anode for the introduction thereinto of fluid under pressure. The pressurized fluid biases the anode toward the cathode during anode consumption, and the diaphragm provides for longitudinal and angular movement of the anode to accommodate uneven corrosion of the anode. The frames of adjacent cells define a third chamber therebetween for the introduction of consumable gas to the cathode. An array of manifolds are formed throughout the frames of adjacent power cells for introducing electrolyte between the anode and the cathode, for introducing consumable gas to the cathode and for introducing fluid under pressure to the expansion chamber.

Claims

1. A power module of the type including a plurality of power cells arranged in alongitudinal stacked relation, each power cell including a frame, a gas-consuming cathode mounted at one end of the frame, a consumable anode, a flexible diaphragm mounting the anode in the frame to provide for longitudinal and angular movement of the anode as the anode is consumed, the flexible diaphragm cooperating with the frame to define a sealed expansion chamber on the side of the anode opposite the cathode, first means for introducing fluid under pressure into the expansion chamber to bias the anode toward the cathode, the flexible diaphragm cooperating with the frame to define a sealed flow passage between the anode and the cathode, second means for introducing electrolyte into the flow passage, means spacing and sealing adjacent cell frames providing separate passage means for soluble gas to the gas-consuming cathode, and third means for introducing soluble gas into the separate passage means.

2. The power module of claim 1 which includes a current collector block attached to one side of the anode.

3. The power module of claim 2 which further includes a conducting plate spaced from the current collector block and flexible conducting means interconnecting the current collector block and the conducting plate.

4. The power module of claim 2 which includes a plurality of prongs on the current collector block which extend into the anode.

5. The power module of claim 1 wherein the diaphragm includes a holder portion for receiving the anode.

6. The power module of claim 5, wherein the holder portion surrounds the perimeter of the anode and is folded over whereby as the anode is consumed and moved towards the cathode, the folded portion of the holder is peeled back at substantially the same rate as the anode is moved towards the anode to thereby leave only the face of the anode exposed to the electrolyte and the remainder of the sides of the perimeter of the anode protected from the electrolyte.

7. The power module of claim 1 wherein the first, second and third means include manifold means throughout the frames of adjacent power cells.

8. A power module of the type including a plurality of power cells arranged in a longitudinal stacked relation, each power cell including a frame, a gas consuming cathode mounted at one end of the frame, a consumable anode, a flexible diaphragm mounting the anode in the frame to provide for longitudinal and angular movement of the anode as the anode is consumed, a holder portion in the diaphragm for receiving the anode, the holder portion surrounding the perimeter of the anode and being folded over, a current collector block attached to one side of the anode, the flexible diaphragm cooperating with the frame to define a sealed expansion chamber on the side of the anode opposite the cathode, first means for introducing fluid under pressure into the expansion chamber to bias the anode toward the cathode, the flexible diaphragm cooperating with the frame to define a sealed flow passage between the anode and the cathode, second means for introducing electrolyte into the flow passage, means spacing and sealing adjacent cell frames providing separate passage means for soluble gas to the gas consuming cathode and third means for introducing soluble gas into the separate passage means.

9. The power module of claim 8, which further includes a conducting plate spaced from the current collector block and flexible conducting means interconnecting the current collector block and the conducting plate.

10. The power module of claim 8 wherein the first, second and third means include manifold means throughout the frames of adjacent power cells.