DE2024950A1 - Electrochemical elements, especially primary metal / oxygen (air elements) - Google Patents

Description

Energy Conversion Limited, Britannic House, Moor Lane, London, B.C.2,

England

Electrochemical elements, especially primary metal / oxygen (air elements).

The invention relates to electrochemical elements, in particular on primary metal / oxygen (air) elements.

According to the invention is a metal / oxygen (air) primary element provided in which the anode electrode is open and provides a container for an electrolyte for the element.

According to a further development of the invention, the primary element contains a tubular anode electrode around which a cathode electrode is arranged, and the interior of the tubular anode electrode is used as an electrolyte container.

Preferably, the space or distance between the anode and cathode electrodes is kept to a minimum, as is done by a interposed separator is determined.

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The anode and cathode electrodes and the separator can be cylindrical, be, have an elliptical cross-section or they can be planar. Main surfaces be provided with semi-cylindrical edge parts.

The anode electrode may have a plurality of openings for use be provided as an electrolyte container.

At least one of the openings or the opening in the anode electrode may be provided with a current collector in electrical contact provided with the inner side wall when the opening is cylindrical, has the W current collector preferably has the form of a spiral or a helical line, which is connected to the inside of such an anode in Intervention stands or is embedded in it.

In a modified embodiment, the opening with a Be provided pantograph, which divides such an opening and both a space for a lead electrolyte tank and one another special space voreetiem, which for the flow of a Cooling medium can be used. The opening can be provided with grooves be, the current collector in the form of a rod or a cylindrical sheet metal member with the grooves for dividing the opening is engaged.

At least one end cap is provided which is made of electrically insulating material such as synthetic plastic may consist of an electrically conductive member such as includes a rivet which is electrically connected to one of the electrodes. The cathode electrode can be glued to the or each end cap.

A perforated outer casing can be provided so that Air has access to the cathode.

Such an outer wrapper can be placed between the eating caps Adhesive, be attached by hot glue © of the ätsreh fold over. ' The outer shell can be made of metal and wrap around

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extending around one end of the element. In this version * form one of the electrodes can be electrically connected to the outer envelope.

The invention is shown in the drawing, for example.

Figure 1 is a longitudinal section through one half of a primary metal / Oxygen (air) element.

Figure 2 is a top plan view of a modified embodiment of a prira & relementes.

Figure 3 is a plan view of a further modified embodiment * shape of a primary element.

FIG. 4 is a plan view of a still further modified embodiment of the primary element.

Figure 1 shows a longitudinal section through half a meta-11 / Oxygen (air) element, the half of which is not shown is a mirror image of the illustrated half.

The element has a cylindrical anode electrode 11, which is inner central opening 11a as a container for the electrolyte du Element serves. Am separator 12la in the shape of a cylinder Bag extends "I around dl · anode old exception" above the Opening 11a on the Ob «ra« it · des BlesMMit · «h« r \ m. Badkapp'n are 13 at the upper and lower ends of the element, and a cylindrical, sheet-metal cathode electrode 14 surrounds the perpendicular. Along the separator 12 and old the band 13 is glued. .

The anode 11 can be made of porous zinc old added mercury made in. The separator 12 can be made of perforated polyvinyl chloride, Polypropylene or cellophane. The end caps 13 are made of "synthetic" plastic material, and the

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The cathode has a hydrophobic layer and a catalyst, as is preferably described in the pending patent application P 1920688.3 is shown. The electrolyte for use with such an element would consist of an aqueous solution of potassium hydroxide.

A perforated cylindrical outer casing 15 forms the cathode 14 and allows air to enter the cathode to facilitate depolarization. The envelope 15 can be made of metal and extend between the end caps 13 which they use an adhesive, hot glue or Fold is attached. In the case of a modified one, not shown The casing 15 also extends around the embodiment lower part of the element around, and the lower end cap 13 is then left out.

A copper or brass rivet 16 is riveted to each of the end caps 13, a reinforcing metal washer 17 is disposed near the tab 16 on the outer surface of the end cap 13, and a sealing washer 18 is disposed on the tab 16 on the inner surface of the end cap 13. A helical current collector 19, which can be made of copper or brass, engages or is embedded in the wall of the opening 11a and engages with the upper layer 16 and forms an external connection to the anode 11. Its electrical line 20 is conducted from the cathode 14 to the bottom 16 and forms a rental © üuflere connection of the cathode 14 when the lower end cap is not provided, one of the electrodes with the ittfteren enclosure 15 and the other with the Viet 16 in the upper End cap 13 are connected.

lin element according to IPigur X is approved and tested would be very successful in the jy? feeita way "If a Blensnt would be suitable for it" a small ^ ttktzlmdk® device such as a Batterial "t" l @ b in one fflsmii®x & pp »mt with. ' To provide electricity. '

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Figure 2 shows a top view of a primary metal oxygen '(air) Bleaent similar to that of FIG. 1. In FIG. 2, the end cap is closed a clearer illustration of the difference between this element and that according to FIG. 1 has been omitted. In the element of FIG. 2, the anode current collector 19 * includes a sheet metal member having a generally cruciform cross-section. In this way, the pantograph 19 * forms a subdivision and sees four rooms 11a * for accommodation an electrolyte and a middle space 11b *. The middle space lib can be used to create a passage a cooling medium such as air through the center of the element to enable.

FIG. 3 shows a plan view of a further modified embodiment of the anode and anode current collector similar to FIG. 2 of a primary cell. In this arrangement, the opening provided in the anode 11 with inwardly extending grooves lic, which are in engagement with a rod-shaped or cylindrical current collector 19 ··. This way there are four rooms lla ** intended to accommodate an electrolyte, and it can a fixed pantograph 16 ** or a cylindrical pantograph be provided to allow the passage of a cooling medium.

Finally, FIG. 4 shows a further modified one in plan view Embodiment on a primary metal / oxygen (air) element similar to that of Figures 2 and 3. In this arrangement, the central lead electrolyte container opening 19 by a plurality of special openings 21 replaced.

In each embodiment described, the electrolyte in free form, gelled or absorbed in a wick, not shown. It should be pointed out that with each Embodiment a free electrolyte has a substantial distance from the cathode.CfcgJeich the distance between anode, separator and cathode relatively large for the sake of clarity and clarity is shown, in practice the anode has one

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Fretsits in the cathode / separator, thus holding the space in between in between to a minimum upright to keep the volt drop in that Element.

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Claims (15)

Ε / ρ 6875 -7- May 20 70 Claims 1. Metal / oxygen (air) primary element, characterized in that the anode electrode (11) is provided with an opening (Ha) and provides a container for an electrolyte for the element. 2. Primary element, characterized by a tubular anode / den electrode (11) around which a cathode electrode (14) is arranged, and the inner space (Ha) of the tubular anode electrode is used as an electrolyte container. 3. Primary element according to claim 2, characterized in that the Space between the anode (11) and the cathode (14) a minimum is as determined by a separator (12) arranged in between. 4. Primary element according to claim 3, characterized in that the Anode and cathode electrodes (11, 14) and the separator (12) are cylindrical, and have an elliptical cross-section or the flat main surfaces are provided with semi-cylindrical edge parts. 5. Primary element according to one of the preceding claims, characterized characterized in that the anode (11) is provided with a plurality of openings (21) for use as a lead electrolyte holder. 6. Pcimär element according to one of the preceding claims, characterized characterized dat at least one of the openings (21) or the Opening (lla) in the anode electrode (11) with a «current collector or collector (19) is provided in electrical contact with the inner wall thereof. 7. Primary element according to claim 6, characterized in that the dafl The opening or openings (12, 21) sy are inconsistent, and the current collector (19) has the shape of a helical line, which it the 009849/1359 Ε / ρ 6875 -β- May 20 70 B / We 202Α950 ■■■ '■ Inside such an electrode (11) engages or therein is embedded. 8. Primary element according to claim 6, characterized in that the Pantograph (19 *) is designed so that it opens the opening (Ha *) divided and provides both a space for an electrolyte container and a further special space (Hb), which for the flow of a cooling medium ^ can be used. 9. Primary element according to claim ß, characterized in that the Opening (Ha **) is provided with keyways, the current collector in the form of a rod or a cylindrical sheet metal member (19 **) with the keyways to subdivide the opening (Ha · «) into Engagement is. 10. Primary element according to one of the preceding claims, characterized by at least one end cap (13) made of electrically insulating material, which is an electrically conductive member (16) which is electrically connected to one of the electrodes (H, 14). 11. Primary element according to claim 10, characterized in that the cathode electrode (14) is sealed with the or each end cap (13). 12. Primary element according to one of the preceding claims, characterized through a perforated outer cover (15) for the Access of air to the cathode. 13. Primary element according to claim 12, characterized in that the outer covering (15) on the end cap (16) or between each of the end caps (16) by an adhesive, by heat sealing or is attached by bending. 14. Primary element according spoke 12 or 13, characterized in that dafi the outer casing ($ 15 made of metal let and «i 009S49 / 1359 Ε / ρ 6875 -9- May 20 70 B / We extends around one end of the element. 15. Primary element according to claim 14, characterized in that one of the electrodes are electrically connected to the outer casing (15) is. 009849/1359