CN201946716U

CN201946716U - Metal-air battery

Info

Publication number: CN201946716U
Application number: CN2011200664150U
Authority: CN
Inventors: 余建岳
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-03-15
Filing date: 2011-03-15
Publication date: 2011-08-24
Anticipated expiration: 2021-03-15

Abstract

The utility model provides a metal-air battery, which comprises a shell, a cover, air electrodes, electrolyte and metal electrodes, wherein an electrolyte inlet and an electrolyte outlet are arranged on the shell, a cavity is arranged in the shell, the air electrodes are arranged on the wall of the shell, the electrolyte flows into the cavity and the metal electrodes are inserted into the electrolyte. The metal-air battery is characterized in that baffles are arranged in the cavity of the shell at intervals, and a space is arranged between the bottom end of each baffle and the bottom of the shell. The metal-air battery has the advantages that the area of an electrochemical dead zone can be effectively reduced, hydroxide produced during discharging is evenly deposited, when the battery is not in use, the electrolyte can be drained to eliminate the self-discharging and hydrogen evolution phenomena of the battery, the problem of unbalanced discharging caused by uneven electrolyte concentration during discharging is fundamentally solved, the stability of the battery is improved, the metal electrodes are synchronously consumed, wastage is avoided and the service life of the battery is prolonged; and moreover, by arranging a copper sheet at the external middle part of the shell, balanced discharge is further strengthened and the stability and the reliability of the battery are improved.

Description

A kind of metal-air cell

Technical field

The utility model relates to a kind of metal-air cell, and especially a kind of metal-air cell of eliminating the electrochemistry blind area belongs to the battery technology field.

Background technology

At energy resource supply day by day under scarcity and the environmental protection pressure, seek and tap a new source of energy and become human top priority, especially in automobile industry, development, repacking new forms of energy car have become national governments' good " opera involving much singing and action ", become the focus of international competition especially with metal-air cell efficient, clean and that can the regenerate pure electric automobile that is power.Up to the present, electric automobile why also not extensive use get up, therefore mainly be to be limited by battery technology, will develop electric automobile and just be unable to do without this core technology of battery, and the battery that is hopeful to obtain industrialized development at present most should belong to metal-air cell.Existing metal-air cell is the housing by the band cavity, be located on the housing, by the air electrode sheet that catalytic active layer, currect collecting net, waterproof ventilative layer are composited, contain neutrality or alkaline electrolysis solution in the housing cavity, the metal electrode in the insertion electrolyte constitutes.Metal-air cell is as positive active material with airborne oxygen, the electrochemical cell that constitutes as negative electrode active material with metal such as zinc, aluminium, magnesium etc., when its in work when (discharge), airborne oxygen can produce hydroxide ion in negative electrode generation reduction reaction, the oxidized generation hydroxide of metal anode, simultaneously in external circuit, form electron stream, and electric energy outwards is provided.

Because the electrochemical reaction of existing above-mentioned metal-air cell is finished in the housing cavity, the hydroxide that produces in the discharge process is deposited on cavity bottom easily, and inwardly form thick and big non-homogeneous deposition region gradually from electrolyte entrance, and then form electrochemistry heterogeneous blind area, and along with the prolongation of time continues to increase electrochemistry blind area area, constantly increase the weight of the heterogeneity of electrochemistry blind area, thereby cause the concentration of electrolyte difference and be difficult to keep balanced discharge, and can unbalanced that metal electrode is consumed be inhomogeneous because of discharging, thereby make the metal electrode hydrogen-separating quantity big, and reactive deposition thing extruding air electrode causes electrode damage, shortens battery useful life.Therefore, must improve existing metal-air cell.

Summary of the invention

For overcoming existing metal-air cell because of there being the electrochemistry blind area, guiding discharge is unbalanced, and the waste that causes because of metal electrode consumption is uneven and influence deficiency such as battery useful life, the utility model provides a kind of metal-air cell of eliminating the electrochemistry blind area.

The utility model provides a kind of like this metal-air cell, comprise and establishing on it into, liquid outlet, establish the housing and the cap of cavity in it, be located at the air electrode on the housing wall, flow into the electrolyte in the cavity, insert the metal electrode in the electrolyte, it is characterized in that being provided with at interval in the housing cavity baffle plate, and be provided with spacing between the bottom of baffle plate and the housing, form the underflow passage by this spacing, do not influencing under the situation that electrolyte enters the housing cavity, effectively stop the non-homogeneous deposition of hydroxide, eliminate the formation of large tracts of land electrochemistry blind area, overcome the heterogeneity of electrochemistry blind area, keep equalization discharge, and can when battery is stopped using, emit electrolyte to eliminate the self discharge and the hydrogen evolution phenomenon of battery.

Described baffle plate vertically places in the housing cavity, and the upper end of baffle plate and case top maintenance spacing, to form the top circulation road.

Described metal electrode upper end directly is fixed on the cap, with convenient insertion, taking-up, replacing metal electrode.

Described metal electrode is fixed on the cap by grafting or the activity of being spirally connected, with convenient insertion, taking-up, replacing metal electrode.

Described metal electrode is provided with the connection copper sheet, and this copper sheet links to each other with the afflux post that passes cap, outwards to power as power cathode.

The outer middle part of described housing is provided with the copper sheet that links to each other with air electrode, and this copper sheet links to each other with afflux post on the cap, outwards to power as positive source.

The utility model compared with prior art has following advantage and effect: adopt such scheme, can effectively reduce electrochemistry blind area area, and make the hydroxide uniform deposition that produces in the discharge process, and can when stopping using, battery emit electrolyte to eliminate the self discharge and the hydrogen evolution phenomenon of battery, fundamentally solve in the discharge process because of the uneven unbalanced problem of bringing of discharge of concentration of electrolyte, improve stability test, make the metal electrode synchronous consumption, avoid causing waste, prolong battery useful life, in addition, by the copper sheet setting at the outer middle part of housing, further strengthen equalization discharge, improve stability test and reliability.

Description of drawings

Fig. 1 is the front view of the utility model;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the A-A cutaway view of Fig. 1.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further.

As Fig. 1, Fig. 2, Fig. 3, the metal-air cell of the elimination electrochemistry blind area that the utility model provides, comprise and establish inlet 1 on it, liquid outlet 6, establish the housing 2 and the cap 3 of cavity 9 in it, be located at the air electrode 7 on housing 2 walls, flow into the electrolyte in the cavity 9, insert the metal electrode 12 in the electrolyte, in its middle shell 2 cavitys 9 baffle plate 8 is set at interval, and be provided with spacing 10 between the bottom of baffle plate 8 and housing 2 bottoms, form the underflow passage by this spacing 10, do not influencing under the situation that electrolyte enters housing 2 cavitys 9, effectively stoping the non-homogeneous deposition of hydroxide, eliminating large tracts of land electrochemistry blind area, overcome the heterogeneity of electrochemistry blind area, keep equalization discharge; Described baffle plate 8 is vertically in housing 2 cavitys 9, and the upper end of baffle plate 8 and housing 2 tops maintenance spacing, to form top circulation road 13; Described metal electrode 12 upper ends directly are fixed on the cap 3, and with convenient insertion, taking-up, replacing metal electrode 12, metal electrode 12 is provided with and connects copper sheet 11, and this copper sheet 11 links to each other with the afflux post 14 that passes cap 3, outwards to power as power cathode; Described housing 2 outer middle parts are provided with the copper sheet 4 that links to each other with air electrode 7, and this copper sheet 4 links to each other with afflux post 5 on the cap 3, outwards to power as positive source.

Claims

1. metal-air cell, comprise and establish liquid inlet and outlet on it, establish the housing and the cap of cavity in it, be located at the air electrode on the housing wall, flow into the electrolyte in the cavity, insert the metal electrode in the electrolyte, it is characterized in that at interval baffle plate being set in the housing cavity, and be provided with spacing between the bottom of baffle plate and the housing bottom.

2. metal-air cell according to claim 1 is characterized in that described baffle plate vertically places in the housing cavity, and is provided with spacing between the upper end of baffle plate and the case top.

3. metal-air cell according to claim 1 is characterized in that described metal electrode upper end directly is fixed on the cap.

4. metal-air cell according to claim 1 is characterized in that described metal electrode is fixed on the cap by grafting or the activity of being spirally connected.

5. metal-air cell according to claim 1 is characterized in that described metal electrode is provided with the connection copper sheet, and this copper sheet links to each other with the afflux post that passes cap.

6. metal-air cell according to claim 1 is characterized in that the outer middle part of described housing is provided with the copper sheet that links to each other with air electrode, and this copper sheet links to each other with afflux post on the cap.