CN106816649A - The double membrane safety valve winding type accumulators of the symmetrical combination electrode of continuous lug - Google Patents

The double membrane safety valve winding type accumulators of the symmetrical combination electrode of continuous lug Download PDF

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Publication number
CN106816649A
CN106816649A CN201710246157.6A CN201710246157A CN106816649A CN 106816649 A CN106816649 A CN 106816649A CN 201710246157 A CN201710246157 A CN 201710246157A CN 106816649 A CN106816649 A CN 106816649A
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China
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negative
safety valve
disk
rupture pressure
pressure disc
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CN201710246157.6A
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Chinese (zh)
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陈学琴
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Individual
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Individual
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Priority to CN201710246157.6A priority Critical patent/CN106816649A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/06—Lead-acid accumulators
    • H01M10/12—Construction or manufacture
    • H01M10/125—Cells or batteries with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/394—Gas-pervious parts or elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • H01M50/541—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges for lead-acid accumulators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

A kind of double membrane safety valve winding type accumulators of symmetrical combination electrode of continuous lug, including battery case and battery core, it is characterized in that：Barrier film of the battery core by positive plate, negative plate and between the positive plate and negative plate is wound into column by battery core spool, and anode collection disk and negative pole currect collecting disk are respectively equipped with the two ends end top of battery core；The positive plate is being provided with one with the isometric lug of the positive plate i.e. continuous lug of positive pole by anode collection disk side top, and current collecting plates are provided with a helical form cell body i.e. positive plate draw-in groove；The positive plate and negative plate are combination electrode, and it is configured to stereotype as base plate, and the coating of metal oxides of strip distribution is provided with stereotype.The beneficial effects of the invention are as follows the invention by unique end face afflux structure; and combination electrode, electric current admittance ability is effectively improved, while making the battery possess super capacitor high magnification charging and discharging characteristic; double membrane safety valves can preferably protect battery, improve battery performance.

Description

The double membrane safety valve winding type accumulators of the symmetrical combination electrode of continuous lug
Technical field
The present invention relates to lead-acid accumulator, the takeup type plumbic acid more particularly, to a kind of high power, high-multiplying power discharge is super Battery, belongs to battery processing and manufacturing technical field.
Background technology
Traditional lead-acid battery manufacturing process and technology have been subjected to the course in century more than one.In the hair in century more than one During exhibition, traditional production and process technology is constantly used by constantly innovation, new technology and equipment.
At present, traditional spirally wound lead acid battery uses single or multiple lugs as current collection mode mostly, electric current Derive and introducing is confined on a limited number of pad, admittance ability is relatively low, and internal resistance is higher, CURRENT DISTRIBUTION in charge and discharge process It is uneven, it is difficult to realize high current charge-discharge.In addition, during high current charge-discharge, because the internal resistance of cell is big, cause heating serious, Battery temperature is too high, so as to cause potential safety hazard；Because general spirally wound lead acid battery high power charging-discharging is poor, cause Battery is performed poor needing the use occasion of high magnification charging and discharging；General accumulator protection valve rupture pressure disc is monofilm knot Structure, once film will make safety valve lose protective effect by acid corrosion, makes shorter battery life, and easily trigger security incident.
The content of the invention
In order to overcome existing spirally wound lead acid battery electric current admittance ability relatively low, internal resistance is higher, electricity in charge and discharge process The uneven defect of flow distribution and in the defect for needing the use occasion of high magnification charging and discharging to perform poor；Safety valve is prevented Quick-fried film is monofilm structure, and the drawbacks of easily trigger security incident, the present invention provides a kind of continuous symmetrical combination electrode of lug double films peaces Full valve winding type accumulator, it can make homogeneous current distribution in charge and discharge process, effectively improve electric current admittance ability, and improve The mechanical strength and anti-shake performance of electrode, reduce electrode internal resistance, are provided simultaneously with super capacitor high magnification charging and discharging special Property；Safety valve two film construction rupture pressure disc makes battery safer, extends the service life cycle of battery, makes takeup type lead acid storage battery The performance in pond is further improved.
The technical solution adopted for the present invention to solve the technical problems is：A kind of double film peaces of symmetrical combination electrode of continuous lug Full valve winding type accumulator, including battery case (5) and battery core (33), it is characterized in that：Battery core (33) is by positive plate (1), negative pole Piece (2) and the barrier film (3) between the positive plate and negative plate are wound into column by battery core spool (23), in electricity The two ends end top of core (33) is respectively equipped with anode collection disk (6) and negative pole currect collecting disk (7)；The positive plate (1) is by positive pole collection Flow table (6) side top is provided with one and the isometric continuous lug of the lug i.e. positive pole (8) of positive plate (1), in the continuous lug of positive pole (8) The position between top with barrier film (3) by anode collection disk (6) side is provided with a row along pole piece length direction equidistant arrangement Positive plate stomata (20)；The negative plate (2) by negative pole currect collecting disk (7) side top be provided with one with negative plate (2) it is isometric Lug is the continuous lug of negative pole (9), between the top of the continuous lug of negative pole (9) and barrier film (3) by negative pole currect collecting disk (7) side Position be provided with negative plate stomata (34) of the row along pole piece length direction equidistant arrangement；The anode collection disk (6) is plate-like Body, a circular hole i.e. positive pole safety valve mounting hole (36) is provided with the center of disk, and disk body is provided with one with anode pole piece spiral kissing The helical form cell body of conjunction is positive plate draw-in groove (32), and the continuous lug of the positive pole (8) of positive plate (1) is along positive plate draw-in groove (32) blocking In wherein, and fixed by welding method；The negative pole currect collecting disk (7) is also discoid body, and a circular hole is provided with i.e. at the center of disk Negative pole safety valve mounting hole (37), disk body is provided with one and is matched with cathode pole piece spiral helical form cell body i.e. negative plate draw-in groove (35), the continuous lug of the negative pole (9) of negative plate (2) is equipped in wherein along negative plate draw-in groove (35), and is fixed by welding method.
The safety valve (14) is made up of emergency valve seat (15) and rupture pressure disc (11) and safe bonnet (10), emergency valve seat (15) it is a column, its center is provided with a spiral helicine air flue (16), and the bottom and top of air flue (16) are respectively equipped with lower filter Sour piece (13) and upper filter acid film (12), a hat shape rupture pressure disc (11) is provided with the top of upper filter acid film (12), rupture pressure disc (11) by Rupture pressure disc inner membrance (25) and rupture pressure disc adventitia (26) and the two film construction linked together by rupture pressure disc connector (27), it is explosion-proof Film inner membrance (25) and rupture pressure disc adventitia (26) are respectively equipped with rupture pressure disc inner membrance lip reinforcement (38) and rupture pressure disc adventitia lip adds Strong muscle (39), rupture pressure disc inner membrance lip reinforcement (38) and rupture pressure disc adventitia lip reinforcement (39) are socketed on emergency valve seat respectively (15) on rupture pressure disc inner membrance step (30) and rupture pressure disc adventitia step (31), one is provided with safety on the top of rupture pressure disc (11) The safe bonnet of the hat shape (10) that valve seat (15) buckle connects, safe bonnet stomata (29) is provided with the side of safe bonnet (10).
Anode protection cap (21) and battery are respectively equipped with the outside of anode collection disk (6) and negative pole currect collecting disk (7) Negative pole protection cap (22).Positive pole safety valve mounting hole (36) is respectively equipped with anode collection disk (6) and negative pole currect collecting disk (7) center With negative pole safety valve mounting hole (37), safety valve (14) is separately installed with its hole.In anode collection disk (6) and negative pole currect collecting disk (7) positive terminal (18) and negative terminal (19) are respectively equipped with.
It is configured to stereotype as base plate (43) for the positive plate (1) and negative plate (2), and strip point is provided with stereotype The coating of metal oxides (42) of cloth, coating of metal oxides material is RuO2、MnO2、Co3O4、NiO、V2O5、Fe3O4、SnO2 Deng.
The beneficial effects of the invention are as follows the invention by unique end face afflux structure, the collection of battery pole piece is substantially increased Flow area simultaneously improves the bonding strength between pole piece and collector, the mechanical strength of electrode and anti-shake performance is significantly carried Height, realizes being uniformly distributed for the current density during battery high current charge-discharge, reduces internal resistance, perfect heat-dissipating, can be with Effectively reduce battery temperature during high current charge-discharge；Combination electrode make battery be provided simultaneously with super capacitor high magnification charge and Flash-over characteristic；The filter acid film of safety valve can prevent bulky grain acid mist by and allow that gas passes through, can prevent gas big again Amount is gone out, and spiral air channel mitigation of gases flow velocity simultaneously makes acid mist be condensed in helicoid, reduces corrosion of the acid to rupture pressure disc, double film knots The burst disk of structure can effectively control the gas pressure of inside battery, keep moisture, can isolate again naked light scurry into inside battery and Electric pool gas are ignited, and is double gradient protection.These characteristics make battery security be improved significantly, make winding The service life cycle of formula lead-acid accumulator is extended, and the performance of battery is further enhanced.The present invention Preparation method economy, simple, it is easy to accomplish large-scale production, had broad application prospects in battery manufacture field.
Brief description of the drawings
Fig. 1 is sectional view of the present invention；
Fig. 2 is partial sectional view of the present invention；
Fig. 3 is positive plate schematic diagram of the present invention；
Fig. 4 is anode collection disk schematic diagram of the present invention；
Fig. 5 is battery core sectional view of the present invention；
Fig. 6 is negative plate schematic diagram of the present invention；
Fig. 7 is negative pole currect collecting disk schematic diagram of the present invention；
Fig. 8 is safety valve sectional view of the present invention；
Fig. 9 is safe bonnet sectional view of the invention；
Figure 10 is safety valve cap outside drawing of the present invention；
Figure 11 is safety valve rupture pressure disc sectional view of the present invention；
Figure 12 is safety valve rupture pressure disc outside drawing of the present invention；
Figure 13 is the upper filter acid film schematic diagram of the present invention；
Figure 14 is the lower filter acid film schematic diagram of the present invention；
Figure 15 is emergency valve seat sectional view of the present invention；
Figure 16 is emergency valve seat outside drawing of the present invention.
1. positive plate in figure, 2. negative plate, 3. barrier film, 4. safe valve protection cap, 5. battery case, 6. anode collection disk, 7. negative pole currect collecting disk, the 8. continuous lug of positive pole, the 9. continuous lug of negative pole, 10. safe bonnet, 11. rupture pressure discs, filter acid film on 12., 13. times filter acid films, 14. safety valves, 15. emergency valve seats, 16. air flues, 17. batteries, 18. positive terminals, 19. negative terminals, 20. Positive plate stomata, 21. anode protection caps, 22. GND protection caps, 23. battery core spools, 24. diaphragms, 25. is explosion-proof Film inner membrance, 26. rupture pressure disc adventitias, adventitia connector in 27. rupture pressure discs, 28. safe valve seals, 29. safe bonnet stomatas, 30. rupture pressure disc inner membrance steps, 31. rupture pressure disc adventitia steps, 32. pole piece draw-in grooves, 33. battery cores, 34. negative plate stomatas, 35. negative poles Piece draw-in groove, 36. positive pole safety valve mounting holes, 37. negative pole safety valve mounting holes, 38. rupture pressure disc inner membrance lip reinforcements, 39. prevent Quick-fried film adventitia lip reinforcement, 42. coating of metal oxides, 43. base plates.
Specific embodiment
Technical scheme is further illustrated with specific embodiment below in conjunction with the accompanying drawings.
As illustrated in figs. 1-16, a kind of double membrane safety valve winding type accumulators of symmetrical combination electrode of continuous lug, including battery Shell (5) and battery core (33), it is characterized in that：Battery core (33) by positive plate (1), negative plate (2) and positioned at the positive plate and Barrier film (3) between negative plate is wound into column by battery core spool (23), is respectively equipped with the two ends end top of battery core (33) Anode collection disk (6) and negative pole currect collecting disk (7)；The positive plate (1) by anode collection disk (6) side top be provided with one with just The isometric lug of pole piece (1) is the continuous lug of positive pole (8), in the continuous lug of positive pole (8) and barrier film (3) by anode collection disk (6) Position between the top of side is provided with positive plate stomata (20) of the row along pole piece length direction equidistant arrangement；The negative plate (2) one and the isometric continuous lug of the lug i.e. negative pole (9) of negative plate (2) are being provided with by negative pole currect collecting disk (7) side top, negative Extremely continuous lug (9) and barrier film (3) are provided with a row along pole piece length side by the position between the top of negative pole currect collecting disk (7) side To the negative plate stomata (34) of equidistant arrangement；The anode collection disk (6) is discoid body, and a circular hole is being provided with i.e. just at the center of disk Pole safety valve mounting hole (36), disk body is provided with a helical form cell body matched with anode pole piece spiral i.e. positive plate draw-in groove (32), the continuous lug of the positive pole (8) of positive plate (1) is equipped in wherein along positive plate draw-in groove (32), and is fixed by welding method； The negative pole currect collecting disk (7) is also discoid body, a circular hole i.e. negative pole safety valve mounting hole (37) is provided with the center of disk, on disk body One is provided with to be matched with cathode pole piece spiral helical form cell body i.e. negative plate draw-in groove (35), the continuous lug of negative pole of negative plate (2) (9) it is equipped in wherein along negative plate draw-in groove (35), and is fixed by welding method.
The safety valve (14) is made up of emergency valve seat (15) and rupture pressure disc (11) and safe bonnet (10), emergency valve seat (15) it is a column, its center is provided with a spiral helicine air flue (16), and the bottom and top of air flue (16) are respectively equipped with lower filter Sour piece (13) and upper filter acid film (12), a hat shape rupture pressure disc (11) is provided with the top of upper filter acid film (12), rupture pressure disc (11) by Rupture pressure disc inner membrance (25) and rupture pressure disc adventitia (26) and the two film construction linked together by rupture pressure disc connector (27), it is explosion-proof Film inner membrance (25) and rupture pressure disc adventitia (26) are respectively equipped with rupture pressure disc inner membrance lip reinforcement (38) and rupture pressure disc adventitia lip adds Strong muscle (39), rupture pressure disc inner membrance lip reinforcement (38) and rupture pressure disc adventitia lip reinforcement (39) are socketed on emergency valve seat respectively (15) on rupture pressure disc inner membrance step (30) and rupture pressure disc adventitia step (31), one is provided with safety on the top of rupture pressure disc (11) The safe bonnet of the hat shape (10) that valve seat (15) buckle connects, safe bonnet stomata (29) is provided with the side of safe bonnet (10).
Anode protection cap (21) and battery are respectively equipped with the outside of anode collection disk (6) and negative pole currect collecting disk (7) Negative pole protection cap (22).Positive pole safety valve mounting hole (36) is respectively equipped with anode collection disk (6) and negative pole currect collecting disk (7) center With negative pole safety valve mounting hole (37), safety valve (14) is separately installed with its hole.In anode collection disk (6) and negative pole currect collecting disk (7) positive terminal (18) and negative terminal (19) are respectively equipped with.
It is configured to stereotype as base plate (43) for the positive plate (1) and negative plate (2), and strip point is provided with stereotype The coating of metal oxides (42) of cloth, coating of metal oxides material is RuO2、MnO2、Co3O4、NiO、V2O5、Fe3O4、SnO2 Deng.

Claims (7)

1. double membrane safety valve winding type accumulators of a kind of symmetrical combination electrode of continuous lug, including battery case (5) and battery core (33), it is characterized in that：Battery core (33) by positive plate (1), negative plate (2) and between the positive plate and negative plate every Film (3) is wound into column by battery core spool (23), battery core (33) two ends end top be respectively equipped with anode collection disk (6) and Negative pole currect collecting disk (7)；The positive plate (1) is being provided with one with the isometric pole of positive plate (1) by anode collection disk (6) side top Ear is the continuous lug of positive pole (8), between the top of the continuous lug of positive pole (8) and barrier film (3) by anode collection disk (6) side Position is provided with positive plate stomata (20) of the row along pole piece length direction equidistant arrangement；The negative plate (2) is by negative pole currect collecting Disk (7) side top be provided with one with the isometric continuous lug of the lug i.e. negative pole (9) of negative plate (2), the continuous lug of negative pole (9) with Barrier film (3) is provided with a row along the negative of pole piece length direction equidistant arrangement by the position between the top of negative pole currect collecting disk (7) side Pole piece stomata (34)；The anode collection disk (6) is discoid body, and a circular hole i.e. positive pole safety valve mounting hole is provided with the center of disk (36), disk body is provided with a helical form cell body matched with anode pole piece spiral i.e. positive plate draw-in groove (32), positive plate (1) The continuous lug of positive pole (8) is equipped in wherein along positive plate draw-in groove (32), and is fixed by welding method；The negative pole currect collecting disk (7) also it is discoid body, a circular hole i.e. negative pole safety valve mounting hole (37) is provided with the center of disk, disk body is provided with one with negative pole pole Piece spiral matches helical form cell body i.e. negative plate draw-in groove (35), and the continuous lug of the negative pole (9) of negative plate (2) is along negative plate draw-in groove (35) it is equipped in wherein, and is fixed by welding method.
2. double membrane safety valve winding type accumulators of the symmetrical combination electrode of continuous lug according to claim 1, it is characterized in that： The safety valve (14) is made up of emergency valve seat (15) and rupture pressure disc (11) and safe bonnet (10), and emergency valve seat (15) is a post Shape body, its center is provided with a spiral helicine air flue (16), the bottom and top of air flue (16) be respectively equipped with lower filter acid film (13) and Upper filter acid film (12), a hat shape rupture pressure disc (11) is provided with the top of upper filter acid film (12), and rupture pressure disc (11) is by rupture pressure disc inner membrance (25) and rupture pressure disc adventitia (26) and the two film construction that is linked together by rupture pressure disc connector (27), rupture pressure disc inner membrance (25) Rupture pressure disc inner membrance lip reinforcement (38) and rupture pressure disc adventitia lip reinforcement (39) are respectively equipped with rupture pressure disc adventitia (26), are prevented Quick-fried film inner membrance lip reinforcement (38) and rupture pressure disc adventitia lip reinforcement (39) are socketed on the explosion-proof of emergency valve seat (15) respectively On film inner membrance step (30) and rupture pressure disc adventitia step (31), it is provided with one on the top of rupture pressure disc (11) and blocks with emergency valve seat (15) The safe bonnet of the hat shape (10) that button connects, safe bonnet stomata (29) is provided with the side of safe bonnet (10).
3. double membrane safety valve winding type accumulators of the symmetrical combination electrode of continuous lug according to claim 1, it is characterized in that： Anode protection cap (21) and GND protection are respectively equipped with the outside of anode collection disk (6) and negative pole currect collecting disk (7) Lid (22).
4. double membrane safety valve winding type accumulators of the symmetrical combination electrode of continuous lug according to claim 1, it is characterized in that： Positive pole safety valve mounting hole (36) and negative pole safety valve peace are respectively equipped with anode collection disk (6) and negative pole currect collecting disk (7) center Dress hole (37), is separately installed with safety valve (14) in its hole.
5. double membrane safety valve winding type accumulators of the symmetrical combination electrode of continuous lug according to claim 1, it is characterized in that： Positive terminal (18) and negative terminal (19) are respectively equipped with anode collection disk (6) and negative pole currect collecting disk (7).
6. double membrane safety valve winding type accumulators of the symmetrical combination electrode of continuous lug according to claim 1, it is characterized in that： It is configured to stereotype as base plate (43) for the positive plate (1) and negative plate (2), and the metal of strip distribution is provided with stereotype Oxide coating (42).
7. double membrane safety valve winding type accumulators of the symmetrical combination electrode of continuous lug according to claim 6, it is characterized in that： The coating of metal oxides material that strip distribution is provided with stereotype is ruthenium-oxide.
CN201710246157.6A 2017-04-15 2017-04-15 The double membrane safety valve winding type accumulators of the symmetrical combination electrode of continuous lug Withdrawn CN106816649A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710246157.6A CN106816649A (en) 2017-04-15 2017-04-15 The double membrane safety valve winding type accumulators of the symmetrical combination electrode of continuous lug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710246157.6A CN106816649A (en) 2017-04-15 2017-04-15 The double membrane safety valve winding type accumulators of the symmetrical combination electrode of continuous lug

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Publication Number Publication Date
CN106816649A true CN106816649A (en) 2017-06-09

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