CN112397721A - Lead-acid storage battery composite current collector and battery - Google Patents

Lead-acid storage battery composite current collector and battery Download PDF

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CN112397721A
CN112397721A CN202010821604.8A CN202010821604A CN112397721A CN 112397721 A CN112397721 A CN 112397721A CN 202010821604 A CN202010821604 A CN 202010821604A CN 112397721 A CN112397721 A CN 112397721A
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lead
current collector
alloy
skin
composite current
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杨春晓
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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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/68—Selection of materials for use in lead-acid accumulators
    • H01M4/685—Lead alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/82—Multi-step processes for manufacturing carriers for lead-acid accumulators
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy coatings
    • H01M4/662—Alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/665—Composites
    • H01M4/667—Composites in the form of layers, e.g. coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/68—Selection of materials for use in 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

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Composite Materials (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The invention discloses a composite current collector of a lead-acid storage battery, which comprises: the lead sheath or lead alloy sheath and the light conductor are mutually laminated to form a laminated structure, or the lead sheath or lead alloy sheath covers, winds and wraps the light conductor to form the laminated structure; the lead skin or the lead alloy skin is in conductive connection with the light conductor; the invention also discloses a lead-acid storage battery comprising the lead-acid storage battery composite current collector; the composite current collector of the lead-acid storage battery disclosed by the invention has relatively low weight and resistance; the lead-acid storage battery containing the composite current collector disclosed by the invention has the advantages of relatively high specific energy, relatively small internal resistance and the like.

Description

Lead-acid storage battery composite current collector and battery
Technical Field
The invention relates to a current collector and a battery, in particular to a composite current collector of a lead-acid storage battery and the lead-acid storage battery.
Background
The current collector of the lead-acid storage battery is an important component of an electrode and plays a role in conducting, supporting and fixing combined active substances; lead-acid battery current collectors made of pure lead or lead alloy are widely used for positive and negative electrodes of lead-acid batteries, and the important defects include heavy weight (large specific gravity), high resistance (large resistivity or unsatisfactory conductivity) and the like.
Disclosure of Invention
The invention aims to solve the technical problem of providing a composite current collector of a lead-acid storage battery, which has relatively small weight and relatively low resistance so as to reduce the weight of the current collector of the lead-acid storage battery, reduce the resistance of the current collector of the lead-acid storage battery or improve the conductivity of the current collector of the lead-acid storage battery.
In order to solve the technical problem, the invention provides a composite current collector of a lead-acid storage battery, which comprises: the lead sheet or lead alloy sheet and the light conductor are provided with sheet edges; in the composite current collector, the lead sheath or the lead alloy sheath and the light conductor are mutually laminated to form a laminated structure, or the lead sheath or the lead alloy sheath covers, winds and wraps the light conductor to form the laminated structure; and the lead skin or the lead alloy skin is in conductive connection with the light conductor.
The light conductor is a conductor with the specific gravity or the density smaller than that of lead, or the light conductor is a conductor with the specific gravity smaller than 9.0 or the density smaller than 9.0 Kg/L.
The lead sheath or lead alloy sheath and the light conductor can be in conductive connection in the following mode: welding, casting, bonding, contacting or/and connecting, riveting and pressing;
optionally, the lead sheath or lead alloy sheath is a lead sheath or lead alloy sheath processed by casting, grinding, pressing, rolling, punching, drawing, cutting, shearing, or other physical or mechanical processes. In general, the processing of other physical or mechanical processes such as grinding, pressing, rolling and the like is not only beneficial to meeting the processing or shaping requirements, but also beneficial to enhancing the corrosion resistance or intergranular corrosion resistance of the lead or the lead alloy.
The lightweight electrical conductor may include, but is not limited to: light metals or alloys, conductive oxides, conductive carbon materials, conductive ceramics, conductive plastics or polymers, semiconductors;
the light metal or alloy may include, but is not limited to: aluminum or aluminum alloys, copper or copper alloys, silver or silver alloys, tin or tin alloys, zinc or zinc alloys, titanium or titanium alloys, nickel or nickel alloys, rare earth or rare earth alloys, iron or iron alloys;
the conductive oxide may include, but is not limited to: tin dioxide, conductive glass;
the conductive carbon material may include, but is not limited to: graphite, graphene, carbon nanotubes, activated carbon, carbon black;
the semiconductor may include, but is not limited to: silicon or doped silicon;
optionally, the sheet edge and the surface local region of the lead skin or the lead alloy skin are directly bonded together; or, optionally, the composite current collector may further include an edge sealing material, and the lead skin or the lead alloy skin or the edge of the lead skin or the sheet body and the edge sealing material are bonded to each other. The light conductor in the composite current collector can be isolated from or not contacted with the electrolyte in the external environment of the composite current collector locally or wholly; in one case, the light conductor is wrapped and enclosed in a closed space by the lead sheath or the lead alloy sheath and the edge sealing material, or the light conductor is isolated from the external environment of the composite current collector or the electrolyte in the external environment of the composite current collector, so that the whole light conductor is isolated, not communicated with the external environment space of the composite current collector, or is not contacted with the electrolyte.
The binding or binding means may include, but is not limited to: welding, bonding, casting, injection molding connection, pressing, solidifying into a whole after melting, or/and contacting and connecting;
the edge sealing material may include, but is not limited to: lead or lead alloy or lead dioxide or lead-containing solder, tin or tin alloy or lead-tin alloy solder or tin-containing solder, tin oxide, doped tin oxide, silicon or doped silicon, titanium, viscose, rubber, silica gel, plastics or polymers, glass, silicon oxide, or composites thereof.
The glue, rubber, silicone, plastic or polymer, glass, silica, may include, but is not limited to: conductive glue, rubber, silicone, plastic or polymer, glass, silica;
the conductive adhesive, rubber, silicone, plastic or polymer, glass, silicon oxide, may include but is not limited to: containing lead or lead alloy or lead dioxide, tin or tin alloy or tin oxide or doped tin oxide, titanium, conductive carbon containing materials, viscose containing silicon or doped silicon, rubber, silica gel, plastics or polymers, glass, silicon oxide.
Optionally, the edge sealing material is a part of the lead skin or the lead alloy skin.
Optionally, the frame of the composite current collector is or serves as the edge sealing material.
Optionally, an anti-corrosion layer is arranged between the lead skin or the lead alloy skin and the light conductor at intervals or is inserted into the light conductor, or the surface of the light conductor can be covered with the anti-corrosion layer; optionally, the lead sheath or the lead alloy sheath and the light conductor are both in conductive connection with the anti-corrosion layer so as to achieve conductive connection therebetween, or the lead sheath or the lead alloy sheath and the light conductor can pass through, cross over and bypass the anti-corrosion layer so as to achieve conductive connection therebetween.
Optionally, the corrosion protection layer may include, but is not limited to: lead or lead alloy or lead dioxide or lead-containing solder, tin or tin alloy or lead-tin alloy solder or tin-containing solder, tin oxide, doped tin oxide, silicon or doped silicon, titanium, viscose, rubber, silica gel, plastics or polymers, glass, silicon oxide, or composites thereof.
The glue, rubber, silicone, plastic or polymer, glass, silica, may include, but is not limited to: conductive glue, rubber, silicone, plastic or polymer, glass, silica;
the conductive adhesive, rubber, silicone, plastic or polymer, glass, silicon oxide, may include but is not limited to: containing lead or lead alloy or lead dioxide, tin or tin alloy or tin oxide or doped tin oxide, titanium, conductive carbon containing materials, viscose containing silicon or doped silicon, rubber, silica gel, plastics or polymers, glass, silicon oxide.
The invention also provides a lead-acid storage battery, which comprises an anode and an anode current collector, and a cathode current collector, wherein the anode current collector and the cathode current collector are the composite current collector of the lead-acid storage battery.
Advantageous effects
Under the condition that the shapes and the sizes of the current collectors are the same, the composite current collector of the lead-acid storage battery has smaller weight and lower resistance compared with the traditional current collector of the lead-acid storage battery, namely a lead current collector or a lead alloy current collector.
It can be imagined and calculated that when comparing the composite current collector of the lead-acid battery provided by the present invention with a lead or lead alloy current collector having the same shape and size as the composite current collector of the lead-acid battery provided by the present invention, the composite current collector of the lead-acid battery provided by the present invention is equivalent to: the partial lead or lead alloy material in the lead or lead alloy current collector body is replaced or replaced by the light conductor (the specific gravity or density of the light conductor is less than lead, or the specific gravity of the light conductor is less than 9.0 or the density is less than 9.0Kg/L, the resistivity of the light conductor is possible or can be less than or equal to that of lead or lead alloy or iron or tin, or can be less than 15 x 10-8Omega, m,20 deg.C). Therefore, under appropriate conditions (refer to the examples of the present invention), the composite current collector for a lead-acid battery provided by the present invention has lower weight and lower resistance compared with a lead or lead alloy current collector (a conventional lead-acid battery current collector) with the same shape and size.
Under the same other conditions, the lead-acid storage battery containing the composite current collector of the lead-acid storage battery has smaller weight, higher gravimetric specific energy, smaller internal resistance and higher rate performance than the lead-acid storage battery containing the lead current collector or the lead alloy current collector.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a composite current collector of a lead-acid battery in example 1 of the present invention.
Fig. 2 is a schematic cross-sectional structure diagram of a composite current collector of a lead-acid battery in example 2 of the present invention.
Fig. 3 is a schematic partial cross-sectional structure view of a lead-acid battery composite current collector in which a lead-tin alloy solder is bonded to a lead skin or an outer surface near the edge of the lead alloy skin in a first embodiment of a lead-acid battery composite current collector in example 3 of the present invention.
Fig. 4 is a schematic partial cross-sectional structure view of a lead-acid battery composite current collector in which a lead-tin alloy solder is bonded to a lead skin or an inner surface near an edge of the lead alloy skin in a first embodiment of a lead-acid battery composite current collector in example 3 of the present invention.
Fig. 5 is a schematic partial cross-sectional structure view of a composite current collector of a lead-acid battery with a corrosion layer inserted therein according to a second embodiment of the composite current collector of the lead-acid battery in example 3 of the present invention.
Fig. 6 is a schematic view of a partial cross-sectional structure of a composite current collector of a lead-acid battery, in which a lead-tin alloy solder is combined with a lead skin or a certain area on the surface of the lead skin in a third embodiment of the composite current collector of the lead-acid battery according to example 3 of the present invention.
Fig. 7 is a schematic view of a partial cross-sectional structure of a composite current collector of a lead-acid battery with a narrowed edge deformation in a fourth embodiment of the composite current collector of a lead-acid battery according to example 3 of the present invention.
Fig. 8 is a schematic partial cross-sectional view of a lead-acid battery composite current collector with edges embedded in plastic or lead alloy bodies according to a fourth embodiment of the lead-acid battery composite current collector of example 3 of the present invention.
Fig. 9 is a schematic cross-sectional structure view of a lead-acid battery composite current collector with a cylindrical light conductor, which is aluminum or aluminum alloy or copper alloy, according to a fifth embodiment of the lead-acid battery composite current collector in example 3 of the present invention.
Fig. 10 is a schematic cross-sectional view of a lead-acid battery composite current collector in which the edges of the upper and lower surface lead covers or lead alloy cover sheets are directly bonded to each other according to a sixth embodiment of the lead-acid battery composite current collector in example 3 of the present invention.
Fig. 11 is a schematic cross-sectional view of a lead-acid battery composite current collector formed by laminating a lead sheet or a lead alloy sheet, covering, and wrapping a lightweight conductor according to a seventh embodiment of the lead-acid battery composite current collector in example 3 of the present invention.
Fig. 12 is a schematic cross-sectional view of another lead-acid battery composite current collector formed by laminating a lead sheet or a lead alloy sheet, covering and wrapping a lightweight conductor according to a seventh embodiment of the lead-acid battery composite current collector in example 3 of the present invention.
The reference numerals in the figures are illustrated as follows:
1: lead coating or lead alloy coating on upper surface
2: lower surface lead coating or lead alloy coating
3: aluminium or aluminium alloys, or copper alloys
4: lead-tin alloy solder
5: upper surface lead skin or lead alloy skin outer surface near its edge
6: outer surface of lower surface lead skin or lead alloy skin near its edge
7: upper surface lead skin or lead alloy skin inner surface near its edge
8: lower surface lead skin or lead alloy skin inner surface near its edge
9. 10: anti-corrosion layer
11: plastics or lead alloys
12: a sheet of lead or lead alloy
13. 14: two edges of a lead sheet or lead alloy sheet
100: composite current collector of lead-acid storage battery
AX: a certain area on the lower surface of the upper lead skin
Detailed Description
The light conductor is a conductor with specific gravity smaller than that of lead.
Optionally, the light metal or alloy of the present invention may comprise: a metal or alloy having a specific gravity less than lead.
The electrode comprises a positive electrode and a negative electrode.
In this embodiment, the general structure of the battery includes a positive electrode, a negative electrode, a separator, an electrolyte or an electrolyte, and a battery container or a casing, wherein the positive electrode, the negative electrode, the electrolyte or the electrolyte, and the separator are disposed in the battery container or the casing, the separator is inserted or separated between the positive electrode and the negative electrode, the electrolyte or the electrolyte is at least in contact with the positive electrode and the negative electrode, and the battery container or the casing encloses an electrode reaction chamber; the positive electrode and the negative electrode comprise current collectors and active substances or lead pastes, and the current collectors and the active substances or the lead pastes are in contact with and connected with each other.
The technical content, characteristics and effects of the invention are further detailed in the following embodiments.
Example 1
The composite current collector of the lead-acid battery in the embodiment, as shown in fig. 1, includes: the lead sheet comprises an upper surface lead sheet 1, a lower surface lead sheet 2 and aluminum 3, wherein the upper surface lead sheet 1 and the lower surface lead sheet 2 are provided with sheet edges; in the composite current collector, the upper surface lead skin 1, the lower surface lead skin 2 and the light conductor aluminum 3 are mutually laminated to form a laminated structure, wherein the upper surface lead skin 1 and the lower surface lead skin 2 respectively cover the upper surface and the lower surface of the light conductor aluminum 3, the aluminum 3 is positioned between the upper surface lead skin 1 and the lower surface lead skin 2, and the aluminum 3 is in conductive connection (which can be realized by point or line or surface contact or/and connection or welding or bonding) with the upper surface lead skin 1 and the lower surface lead skin 2;
the lead or the material of the upper surface lead skin 1 and the lower surface lead skin 2 is 1# lead in industry, or electrolytic lead, and the lead purity is 99.994 wt.%; the upper surface lead skin 1 and the lower surface lead skin 2 are processed by physical or mechanical processing technologies such as casting, grinding, pressing, rolling, punching, drawing, cutting and shearing; the upper surface lead sheath 1 and the lower surface lead sheath 2 are cuboids, and the size is as follows: the length is 10mm, the width is 1mm, and the thickness is 0.1 mm;
the aluminum 3 or the material thereof is metal aluminum; it is a cuboid with the dimensions: the length is 10mm, the width is 1.0mm, and the thickness is 0.8 mm.
The laminated structure body thus formed, namely the composite current collector 100 of the lead-acid storage battery of the embodiment, is a cuboid, and has the dimensions of 10mm in length, 1mm in width and 1mm in thickness.
It is known that the physical properties of the upper lead skin 1, the lower lead skin 2 and the aluminum 3 are shown in table 1.
TABLE 1 physical Properties of the objects
Resistivity (omega. m,20 ℃ C.) Density (Kg/L)
EXAMPLE 1 Top lead skin 20.6×10-8 11.35
EXAMPLE 1 lower surface lead skin 20.6×10-8 11.35
Example 1 aluminum (2.5-2.69)×10-8 2.7
Lead current collector 20.6×10-8 11.35
Lead-antimony alloy current collector (containing 3 wt% of antimony) 23.4×10-8 11.10
The composite current collector of the lead-acid storage battery is compared with the traditional current collector of the lead-acid storage battery, which is widely used in the industry, of the lead current collector or the lead-antimony alloy current collector, the composite current collector of the lead-acid storage battery is a cuboid, the length of the composite current collector of the lead-acid storage battery is 10mm, the width of the composite current collector is 1mm, and the thickness of the composite current collector of the lead-acid storage battery is 1mm, namely, the composite current collector of the lead-acid storage battery is the same as the current collector of the lead-acid storage battery in. The physical properties of the lead or lead antimony alloy current collectors are shown in table 1.
As mentioned above, the upper surface lead skin 1, the lower surface lead skin 2, the aluminum 3, the composite current collector of the lead-acid storage battery, the lead current collector, and the lead-antimony alloy current collector of the present embodiment are all 6-sided bodies, six surfaces of each hexahedron are respectively an upper plane, a lower plane, a left plane, a right plane, a front plane, and a rear plane, wherein the upper plane and the lower plane are parallel and opposite to each other, the left plane and the right plane are parallel and opposite to each other, the front plane and the rear plane are parallel and opposite to each other, that is, the hexahedron has 3 pairs of parallel opposing planes, and for the sake of convenience of reference, the resistance between the left and right planes of each hexahedron is referred to as the resistance in the X direction of the hexahedron, the resistance between the front and rear planes of each hexahedron is referred to as the resistance in the Y direction of the hexahedron, and the resistance between the upper and lower planes of each hexahedron is referred to as the resistance in the Z direction of the hexahedron. According to the known current collector size and physical property data of this embodiment, the resistance value (i.e., the resistance value in the direction of X, Y, Z for each hexahedron of the three current collectors) between each pair of parallel opposite planes of the three current collectors (the composite current collector, the lead current collector, and the lead-antimony alloy current collector of this embodiment) and the weight value of the three current collectors can be calculated, and the calculation results are shown in table 2.
TABLE 2 resistance value and weight of object in X, Y, Z directions
Figure BDA0002634599130000051
For table 2 it is noted that:
1. when calculating the resistance of the composite current collector, the calculation method is that the resistance value of the composite current collector in the X direction is the parallel resistance value generated by connecting the resistances of the upper surface lead skin 1, the lower surface lead skin 2 and the aluminum 3 in the X direction in parallel, the resistance value of the composite current collector in the Y direction is the parallel resistance value generated by connecting the resistances of the upper surface lead skin 1, the lower surface lead skin 2 and the aluminum 3 in parallel, the resistance value of the composite current collector in the Z direction is the series resistance value generated by connecting the resistances of the upper surface lead skin 1, the lower surface lead skin 2 and the aluminum 3 in series,
2. in calculating each resistance value in table 2, the resistance value of the connection resistance or the contact resistance at the conductive connection of the upper lead covering 1, the lower lead covering 2 and the aluminum 3 is 0 or ignored.
3. The weight of the composite current collector is equal to 1 weight of the upper surface lead sheath, 2 weight of the lower surface lead sheath and 3 weight of aluminum.
As can be seen from table 2, the resistance value of the composite current collector in the embodiment in the X, Y, or Z direction is significantly smaller than the resistance values of the lead current collector and the lead-antimony alloy current collector in the X, Y, or Z direction; the weight of the composite current collector of the embodiment is obviously less than that of the lead current collector and the lead-antimony alloy current collector.
In practical applications, the connection resistance or the contact resistance at the conductive connection positions of the upper lead sheath 1, the lower lead sheath 2 and the aluminum 3 can be sufficiently small by adjusting the connection process or the combination process, so as to ensure that the resistance value of the composite current collector of this embodiment in the direction X, Y, Z is lower than the resistance values of the lead current collector and the lead-antimony alloy current collector in the direction X, Y, Z, for example, the resistance value of the connection resistance in the Z direction is smaller than 1 × 10-6Ω－10×10-6Ω, the resistance value of the composite current collector in the Z direction in this embodiment can be lower than the resistance values of the lead current collector and the lead-antimony alloy current collector in the Z direction, and the other conditions are similar.
In other embodiments of this embodiment, the length or/and width or/and thickness of the upper lead sheath 1, the lower lead sheath 2, the aluminum 3, the composite current collector, the lead current collector, and the lead-antimony alloy current collector described in this embodiment are enlarged by more than 10 times or other times, and otherwise, are not changed, and according to the above similar analysis and calculation processes, similar conclusions can be obtained: that is, the resistance value of the composite current collector in the X, Y, or Z direction is smaller than the resistance values of the lead current collector and the lead alloy current collector in the X, Y, or Z direction, and the weight of the composite current collector in this embodiment is significantly smaller than the weight of the lead current collector and the lead antimony alloy current collector.
In other practical manners of this embodiment, the upper surface lead skin 1 and the lower surface lead skin 2 in the composite current collector of the lead-acid storage battery of this embodiment may be replaced by lead-tin alloy or lead-antimony alloy (containing 3 wt% of antimony) or lead-rare earth alloy or other lead alloy with the same shape and size, and the physical properties of the lead-tin alloy or lead-antimony alloy are the same as those of the lead-tin alloy solder or lead-antimony alloy current collector (containing 3 wt% of antimony) given in table 1 or 2.
In other embodiments of the present embodiment, the aluminum 3 in the composite current collector of the lead-acid battery of the present embodiment may be replaced by an aluminum alloy or copper or a copper alloy with the same shape and size. The resistivity of the aluminum alloy or the copper alloy is 0.9 to 1.3 times of that of the aluminum or the copper, and the specific gravity of the aluminum alloy or the copper alloy is 0.7 to 1.1 times of that of the aluminum or the copper.
Example 2
The composite current collector of the lead-acid battery in the embodiment, as shown in fig. 2, includes: the lead-tin alloy lead sheet comprises an upper surface lead skin or lead alloy skin 1, a lower surface lead skin or lead alloy skin 2, aluminum 3 and lead-tin alloy solder 4, wherein the upper surface lead skin or lead alloy skin 1 and the lower surface lead skin or lead alloy skin 2 are provided with sheet edges; in the combined current collector of the lead-acid storage battery of the embodiment, the upper surface lead skin or lead alloy skin 1, the lower surface lead skin or lead alloy skin 2 and the light conductor aluminum 3 are stacked to form a stacked structure, wherein the upper surface lead skin or lead alloy skin 1, the lower surface lead skin or lead alloy skin 2 respectively cover the upper surface and the lower surface of the light conductor aluminum 3, the aluminum 3 is located between the upper surface lead skin or lead alloy skin 1 and the lower surface lead skin or lead alloy skin 2, the aluminum 3 is in conductive connection (which can be achieved by point or line or surface contact or/and connection or welding or bonding) with the upper surface lead skin or lead alloy skin 1, the lower surface lead skin or lead alloy skin 2, and the edge of the sheet body of the upper surface lead skin or lead alloy skin 1, the lower surface lead skin or lead alloy skin 2 is bonded with the edge sealing material lead-tin alloy solder 4 (the bonding or bonding manner is welding), One or more of casting, pressing, and melting, and then solidifying into a whole, contacting, and/or connecting), thereby forming the composite current collector 100 of the lead-acid battery of the present embodiment, and isolating and not contacting the part or the whole of the lightweight conductor in the composite current collector with the electrolyte in the external environment of the composite current collector or the external environment of the composite current collector.
The upper surface lead skin or lead alloy skin 1 and the lower surface lead skin or lead alloy skin 2 are processed by physical or mechanical processing technologies such as casting, grinding, pressing, rolling, punching, drawing, cutting, shearing and the like;
the upper lead cover 1 and the lower lead cover 2 may be the same as or identical to the upper lead cover 1 and the lower lead cover 2 in embodiment 1 of the present invention.
The upper surface lead alloy skin 1 and the lower surface lead alloy skin 2 are lead-calcium alloy (containing 0.03-0.09 wt% of calcium); the physical properties are shown in Table 3.
The upper surface lead skin or lead alloy skin 1 and the lower surface lead skin or lead alloy skin 2 are cuboids, and the sizes are as follows: the length is 10mm, the width is 1mm, and the thickness is 0.1 mm;
the aluminum 3 may be or be the same as the aluminum of embodiment 1 of the present invention, that is, it is a rectangular parallelepiped, and has the following dimensions: the length is 10mm, the width is 1.0mm, and the thickness is 0.8 mm. The physical properties are the same as those of the aluminum of inventive example 1, as shown in Table 1 of inventive example 1.
The lead-tin alloy solder 4 or the material thereof is 63Sn37Pb tin-lead alloy, the thickness of which is 0.1mm, the width of which is 1mm, and the length of which is the same as the length or the width or the circumference of the edge of the lead sheath combined with the lead-tin alloy solder, and the physical properties of which are shown in Table 3.
The present embodiment lead acid battery combined type mass flow body that so forms, it is the cuboid, according to lead skin or lead alloy skin 1, 2 and banding material tin alloy solder 4 combine the condition of being in the same place each other different, and the size of its cuboid of combined type mass flow body slightly changes: for example, in the first case, when the edge sealing material, namely the lead-tin alloy solder 4, is combined with the two long edges of the lead sheath or lead alloy sheath 1 or 2 only along the length direction of the lead sheath or lead alloy sheath 1 or 2, the size of the composite current collector of the lead-acid storage battery of the embodiment is as follows: the length is 10mm, the width is 1.2mm, and the thickness is 1 mm; in the second case, when the edge sealing material, namely the lead-tin alloy solder 4, is combined with two wide edges (or short edges) of the lead sheath or lead alloy sheath 1 or 2 only along the width direction of the lead sheath or lead alloy sheath 1 or 2, the size of the composite current collector of the lead-acid storage battery of the embodiment is as follows: the length is 10.2mm, the width is 1mm, and the thickness is 1 mm; in a third case, when the edge sealing material, namely the lead-tin alloy solder 4, is combined with the peripheral edges (two long edges and two short edge edges) of the lead sheath or lead alloy sheath 1 or 2 along the length and width directions of the lead sheath or lead alloy sheath 1 or 2, the size of the composite current collector of the lead-acid storage battery in the embodiment is as follows: 10.2mm long, 1.2mm wide and 1mm thick. In the first of the three cases, the long side portion and the surface portion covered by the lead skin of the aluminum 3 in the composite separator of the lead-acid storage battery of this embodiment are isolated from and do not contact the composite current collector or the electrolyte in the composite current collector external environment; in the second case, similarly to the first case; under the third condition, lead skin or lead alloy skin 1, 2 and banding material combine together will aluminium 3 parcel, enclose in the enclosure space, make aluminium 3 whole isolated with combined type mass flow body external environment or the electrolyte in the combined type mass flow body external environment isolated, do not communicate, contactless. When the aluminum 3 is isolated and isolated from or not contacted with the composite current collector external environment or the electrolyte in the composite current collector external environment, the corrosion and damage of the aluminum 3 caused by the electrolyte in the current collector external environment or the current collector external environment can be slowed down or prevented.
TABLE 3 physical Properties of the substances
Figure BDA0002634599130000071
The combined current collector of the lead-acid battery of this embodiment is compared with a lead current collector or a lead-calcium alloy current collector containing 0.03 to 0.09 wt% of calcium (the shape, size, and volume of the lead current collector and the lead-calcium alloy current collector are the same as those of the combined current collector of the lead-acid battery of this embodiment) in resistance and weight.
As mentioned above, the upper surface lead or lead alloy sheet 1, the lower surface lead or lead alloy sheet 2, and the aluminum 3, the composite current collector of the lead-acid battery of the embodiment, the lead current collector, and the lead-calcium alloy current collector are all 6 plane bodies, six surfaces of each hexahedron are respectively an upper plane, a lower plane, a left plane, a right plane, a front plane, and a rear plane, wherein the upper plane and the lower plane are parallel and opposite to each other, the left plane and the right plane are parallel and opposite to each other, the front plane and the rear plane are parallel and opposite to each other, that is, the hexahedron has 3 pairs of parallel opposing planes, and for the sake of convenience of reference, the resistance between the left and right planes of each hexahedron is referred to as the resistance in the X direction of the hexahedron, the resistance between the front and rear planes of each hexahedron is referred to as the resistance in the Y direction of the hexahedron, and the resistance between the upper and lower planes of each hexahedron is referred to as the resistance in the Z direction of the hexahedron. According to the known current collector size and physical property data in this embodiment, the resistance value (i.e., the resistance value in the X, Y, Z direction of each hexahedron of the three current collectors) between each pair of parallel opposite planes of each current collector (the composite current collector, the lead current collector, and the lead-calcium alloy current collector of the lead-acid battery in this embodiment) and the weight value of the three current collectors can be calculated, and the calculation results are shown in table 4.
Table 4 resistance value and weight of object in X, Y, Z direction
Figure BDA0002634599130000081
For table 4 it should be noted that:
1. the combined current collector referred to in table 4, in which the lead skin or lead alloy skin and the edge sealing material tin alloy solder 4 are combined with each other, is the first case mentioned above in this embodiment, that is, the edge sealing material lead tin alloy solder 4 is combined with the two long edges of the lead skin or lead alloy skin 1 or 2 only along the length direction of each lead skin or lead alloy skin, and the combined current collector of the lead-acid storage battery has the following dimensions: the length is 10mm, the width is 1.2mm, and the thickness is 1 mm;
2. when the resistance of the combined current collector is calculated, the calculation method adopted is that the resistance value of the combined current collector in the X direction is the resistance value of the lead-tin alloy solder 4 combined on one long side of the lead-calcium alloy sheath in the X direction + the parallel resistance value generated after the resistances of the lead-calcium alloy sheath 1 on the upper surface, the lead-calcium alloy sheath 2 on the lower surface and the aluminum 3 in the X direction are connected in parallel + the resistance value of the lead-tin alloy solder 4 combined on the other long side of the lead-calcium alloy sheath in the X direction, the resistance value of the combined current collector in the Y direction is the parallel resistance value generated after the resistances of the lead-calcium alloy sheath 1 on the upper surface, the lead-calcium alloy sheath 2 on the lower surface, the aluminum 3 and the lead-tin alloy solder 4 combined on the long side of the lead-calcium alloy sheath in the Y direction are connected in parallel, and the resistance value of the combined current collector in the Z direction is the lead, And the series resistance generated by connecting the three Z-direction resistances of the aluminum 3 in series is connected with the parallel resistance generated by connecting the Z-direction resistances of the two long-side lead-tin alloy solders 4 combined on the lead-calcium alloy sheath in parallel.
3. When calculating each resistance value in table 4, the resistance value of the connection resistance or the contact resistance at the conductive connection part of the upper surface lead-calcium alloy skin 1, the lower surface lead-calcium alloy skin 2 and the aluminum 3 is 0 or neglected; the contact or/and connection resistance value of the lead-tin alloy solder 4 and the welding joint of the upper surface lead-calcium alloy skin 1 and the lower surface lead-calcium alloy skin 2 is 0 or neglected.
4. The weight of the composite current collector is the sum of the weight of the upper surface lead-calcium alloy skin 1, the lower surface lead-calcium alloy skin 2, the weight of the aluminum 3 and the weight of the two lead-tin alloy solders 4 combined on the long side of the lead-calcium alloy skin.
As can be seen from table 4, the resistance value of the composite current collector of the lead-acid storage battery of this embodiment in the X, Y, or Z direction is significantly smaller than the resistance values of the lead current collector and the lead-calcium alloy current collector in the X, Y, or Z direction; the weight of the composite current collector of the embodiment is obviously less than the weight of the lead current collector and the lead-calcium alloy current collector.
In practical application, the lead on the upper surface can be calcium-bonded by adjusting the connection process or the combination processThe connecting resistance or the contact resistance at the conductive connection part of the gold sheet 1 and the lower surface lead-calcium alloy sheet 2 and the aluminum 3 is small enough, the combined contact or/and the connecting resistance of the lead-tin alloy solder 4 and the edge of the upper surface lead-calcium alloy sheet 1 and the lower surface lead-calcium alloy sheet 2 are small enough, so that the resistance value of the combined current collector of the embodiment in the X, Y, Z direction can be ensured to be lower than that of the lead current collector and the lead-calcium alloy current collector in the X, Y, Z direction, for example, the resistance value of each connecting resistance or contact resistance in the Z direction is smaller than 1 × 10-6Ω－7×10-6Ω, the resistance value of the composite current collector in the Z direction of this embodiment can be lower than the resistance values of the lead current collector and the lead-calcium alloy current collector in the Z direction, and the other conditions are similar.
In other embodiments of this embodiment, the length or/and the width or/and the thickness of the upper surface lead-calcium alloy skin 1, the lower surface lead-calcium alloy skin 2, the aluminum 3, the lead-tin alloy solder 4, and the composite current collector, the lead current collector, and the lead-calcium alloy current collector of the lead-acid battery of this embodiment are simultaneously enlarged by more than 10 times or other times, and other aspects are unchanged, then according to the above-mentioned similar analysis and calculation process, a similar conclusion can be obtained, that is, the resistance value of the composite current collector of the lead-acid battery of this embodiment in the X, Y, or Z direction is smaller than the resistance value of the composite current collector of the lead-acid battery of this embodiment in the X, Y, or Z direction, or the weight of the composite current collector of the lead-acid battery of this embodiment is significantly smaller.
In another implementation manner of this embodiment, the composite current collector of the lead-acid battery of this embodiment at least includes the composite current collector of the lead-acid battery of this embodiment or its structure.
In other embodiments of this embodiment, aluminum 3 is replaced with an aluminum alloy or copper alloy of the same shape and size as aluminum 3.
Example 3
The composite current collector of the lead-acid battery in this embodiment is a composite current collector of the lead-acid battery formed by further developing, changing and adjusting the composite current collector of the lead-acid battery in embodiment 1 or 2 of the present invention, and specifically includes the following steps:
in the structure of the composite current collector of the lead-acid battery of this embodiment, the shape and size of the lead sheath or lead alloy sheath, aluminum or aluminum alloy or copper alloy, and lead-tin alloy solder in the composite current collector of the lead-acid battery of embodiment 1 or 2 of the present invention can be adjusted and changed.
In the first embodiment of the composite current collector of the lead-acid battery of this embodiment, as shown in fig. 3 or 4, in the composite structure of the current collector 100 of the lead-acid battery of this embodiment, the edge sealing material lead-tin alloy solder 4 welded to the edges of the lead skins 1 and 2 is in contact welding with the two outer surfaces 5 and 6 (fig. 3) or the two inner and outer surfaces 7 and 8 (fig. 4) at the edges of the lead skins 1 and 2, which is beneficial to enhancing the strength and firmness of the welding between the edge sealing material lead-tin alloy solder 15 and the lead skins 12 and 13 or the edges thereof, thereby enhancing the reliability of sealing the enclosed space to prevent the aluminum from being corroded by the external environment.
In a second implementation manner of the composite current collector of the lead-acid battery of this embodiment, as shown in fig. 5, in the composite current collector 100 of the lead-acid battery of this embodiment, a conductive anti-corrosion layer 9, 10 is spaced or inserted between a light conductor aluminum 3, an upper surface lead skin or lead alloy skin 1 or a lower surface lead skin or lead alloy skin 2 to form a 5-layer laminated structure (the anti-corrosion layer 9, 10 covers the surface of the light conductor aluminum 3), the light conductor aluminum 3 is conductively connected to the lead skin 12 or 13 through the anti-corrosion layer 9, 10, an edge sealing material lead-tin alloy solder 4 is located at the edge of the 5-layer laminated structure, the edge sealing material lead-tin alloy solder 4 is welded to the lead skin or lead alloy skin 1, the conductive anti-corrosion layer 9, 10, and the light conductor aluminum 3 through a welding process, and the edge sealing material lead-tin alloy solder 4 is welded to the lead skin 1, the lead skin 1, 2 are welded together to form a closed space surrounded by the three, and the light conductor aluminum 3 and the conductive anti-corrosion layers 9 and 10 are located in the closed space and are not communicated, not contacted and isolated with the electrolyte in the external environment of the composite current collector or the external environment of the composite current collector of the embodiment.
The materials of the corrosion protection layer include, but are not limited to: lead or lead alloys or lead dioxide, Sn (tin), tin oxide (including but not limited to tin monoxide, tin dioxide, indium tin oxide, ITO), doped tin oxide (including but not limited to Sb doped tin dioxide, ATO, fluorine doped FTO), tin alloys (including but not limited to alloys of tin with lead, titanium, aluminum, calcium, bismuth), silicon or doped silicon (including but not limited to B, P doped silicon), titanium, composites thereof. The conductive anti-corrosion layer has the function of preventing the surface of the light conductor aluminum 3 and the whole aluminum 3 from contacting with corrosive substances and being corroded besides the function of conducting electricity.
In a third embodiment of the composite current collector for a lead-acid battery of this embodiment, as shown in fig. 6, in the composite current collector 100 for a lead-acid battery of this embodiment, an edge sealing material, namely, a lead-tin alloy solder 4, is used to weld the inner surface 8 at the edge of the lead skin 2 on the lower surface, the edge of the light conductor aluminum 3, and a certain area AX on the lower surface of the lead skin 1 on the upper surface together. This facilitates the repeated realization of the composite current collector structure in multiple areas on the surface of the same lead skin (e.g., the top lead skin 1).
In a fourth embodiment of the composite current collector of the lead-acid battery of this embodiment, as shown in fig. 7, the sheet edges of the lead skin or the lead alloy skin 1, 2 in the laminated structure of the composite current collector 100 of the lead-acid battery of this embodiment deform and narrow close to each other, and the distance between the sheet edges of the lead skin or the lead alloy skin 1, 2 after the deformation and the narrowing is smaller than the distance between the upper surface lead skin or the lower surface lead skin in the central area of the laminated structure, and the cross-sectional shape of the lead solder 4 welded and combined with the upper surface lead skin or the lower surface lead skin 1, 2 at the edge of the laminated structure forms a shape similar to a "T". Such a structure is advantageous for enhancing the sealing, sealing and corrosion prevention of the light electric conductor aluminum 3 partially or entirely.
Further, as shown in fig. 8, the edge of the composite current collector 100 of the lead-acid battery of the present embodiment or the edge of the laminated structure is embedded, inserted, sealed or combined in the plastic or lead alloy 11 by injection molding, casting, welding, bonding, or the like, and optionally, the plastic or lead alloy 11 may be a frame serving as the composite current collector of the lead-acid battery of the present embodiment; optionally, the lead-tin alloy solder 4 may not be present in the current collector or in the edge thereof embedded, inserted, sealed or combined in the plastic or lead alloy 11 of the lead-acid battery of the present embodiment, at this time, the plastic or lead alloy 11 of the current collector of the lead-acid battery of the present embodiment is used as an edge sealing material, so that a local part (e.g., the edge) or the whole part of the aluminum or aluminum alloy or copper alloy 3 in the composite structure is not communicated, contacted or isolated from the external environment of the composite current collector or the electrolyte in the external environment of the composite current collector.
In a fifth embodiment of the composite current collector of the lead-acid battery of this embodiment, as shown in fig. 9, the shape of the aluminum or aluminum alloy or copper alloy 3 in the composite current collector 100 of the lead-acid battery of this embodiment is replaced by a cuboid instead of a cylinder or a rhombic cylinder, and the like, wherein the shapes and the sizes of the upper surface lead skin 1, the lower surface lead skin 2, and the lead-tin alloy solder 4 are also changed, and the cross section thereof is formed into the shape shown in fig. 9.
In a sixth implementation manner of the composite current collector of the lead-acid storage battery of this embodiment, as shown in fig. 10, the sheet edges of the upper surface lead skin or lead alloy skin 1 and the lower surface lead skin or lead alloy skin 2 at the edges of the laminated structure of the composite current collector 100 of the lead-acid storage battery of this embodiment are heated and fused into a whole, so as to directly combine the sheet edges of the upper surface lead skin or lead alloy skin 1 and the lower surface lead skin or lead alloy skin 2, and enclose the part (arc surface of the cylinder aluminum 3) or the whole of the cylinder light conductor aluminum 3 (such as a rib or a comb rack) in a closed space or/and do not communicate, do not contact, and are isolated from the external environment of the composite current collector or the electrolyte in the external environment of the composite current collector; that is to say, or is equivalent to, the edge sealing material combined with the edge of the sheet of the upper surface lead skin or lead skin gold skin 1 and the lower surface lead skin or lead skin gold skin 2 in the composite current collector of the lead-acid storage battery of the embodiment comes from the upper surface lead skin or lead skin gold skin 1, the lower surface lead skin or lead skin gold skin 2, or a part of the lead skin or lead alloy skin (i.e., the edge of the sheet of the upper surface lead skin or lead skin gold skin 1 and the lower surface lead skin or lead skin gold skin 2); or the edge of the sheet body of the upper surface lead skin or lead skin gold skin 1 and the lower surface lead skin or lead skin gold skin 2 becomes or is used as or replaces the edge sealing material, and plays a role in the function and effect of the edge sealing material.
In a seventh embodiment of the composite current collector of the lead-acid battery of this embodiment, as shown in fig. 11 and 12, a lead sheath or lead alloy sheath 12 is covered, wrapped, laminated, and wound on the surface of the light conductor aluminum or aluminum alloy or copper alloy 3 (similarly, the lead sheath or lead alloy sheath 12 is conductively connected with the light conductor aluminum or aluminum alloy or copper alloy 3), and the edges 13, 14 of the sheet body which are close to or close to each other (figure 11) or overlapped (figure 12) of the covering, wrapping, laminating and winding lead sheath or lead alloy sheath 12 are welded and combined with the lead-tin alloy solder 4 of the edge sealing material, thereby forming the composite current collector 100 of the lead-acid battery of the embodiment, and isolating or not contacting the light conductor aluminum or aluminum alloy or copper alloy 3 locally (e.g. at the edge) or entirely with the electrolyte in the environment outside the composite current collector or the environment outside the composite current collector. When the light conductor aluminum or aluminum alloy or copper alloy 3 is in a closed space formed by welding and combining the lead skin or lead alloy skin 12 and the edge sealing material lead-tin alloy solder 4, the light conductor aluminum or aluminum alloy or copper alloy 3 is wholly isolated or not contacted with the composite current collector external environment or the electrolyte in the composite current collector external environment.
Example 4
The composite current collector of the lead-acid battery in this embodiment is a composite current collector of the lead-acid battery formed by further developing, changing and adjusting on the basis of the composite current collector of the lead-acid battery in embodiment 1, 2 or 3 of the present invention, and specifically includes the following steps:
replacing the aluminum or aluminum alloy or copper alloy light conductor in the composite current collector of the lead-acid storage battery in the embodiment 1, 2 or 3 of the invention with one or more of conductive oxides, conductive carbon materials, conductive ceramics, conductive plastics or conductive polymers and semiconductors with the same shape and size;
or/and the edge sealing material lead-tin alloy solder in the composite current collector of the lead-acid storage battery in embodiment 1, 2 or 3 of the invention is replaced by lead dioxide, tin oxide, doped tin oxide, silicon or doped silicon, titanium, viscose, rubber, silica gel, plastic or polymer, glass, silica or a composite material of the above materials with the same shape and size.
Thereby obtaining the composite current collector of the lead-acid storage battery of the embodiment.
According to the computational analysis processes described in embodiments 1 and 2 of the present invention, and according to the requirements of the present invention, by taking the effect of the present invention as a standard and criterion, selecting a light conductor and an edge sealing material with appropriate density and resistivity (refer to embodiments 1 and 2 of the present invention), a composite current collector of a lead-acid battery in the present embodiment can be realized, and simultaneously: under the condition of the same current collector shape and size, the weight and the resistance value (the electric conductivity from at least one point to another point on the current collector) of the composite current collector of the lead-acid storage battery of the embodiment are lower than those of the lead or lead alloy current collector (the electric conductivity from one point to another point on the corresponding position on the current collector).

Claims (10)

1. A lead acid battery composite current collector, comprising: the lead sheet or lead alloy sheet and the light conductor are provided with sheet edges; in the composite current collector, the lead sheath or the lead alloy sheath and the light conductor are mutually laminated to form a laminated structure, or the lead sheath or the lead alloy sheath covers, winds and wraps the light conductor to form the laminated structure; and the lead skin or the lead alloy skin is in conductive connection with the light conductor.
2. The composite current collector of claim 1, wherein the lead sheath or lead alloy sheath is conductively connected to the lightweight conductor by: welding, casting, bonding, contacting or/and connecting, riveting and pressing;
optionally, the lead sheath or lead alloy sheath is a lead sheath or lead alloy sheath processed by casting, grinding, pressing, rolling, punching, drawing, cutting, shearing, or other physical or mechanical processes.
3. The composite current collector for lead-acid batteries according to claim 1, wherein said lightweight electrical conductors include, but are not limited to: light metals or alloys, conductive oxides, conductive carbon materials, conductive ceramics, conductive plastics or polymers, semiconductors;
the light metal or alloy may include, but is not limited to: aluminum or aluminum alloys, copper or copper alloys, silver or silver alloys, tin or tin alloys, zinc or zinc alloys, titanium or titanium alloys, nickel or nickel alloys, rare earth or rare earth alloys, iron or iron alloys;
the conductive oxide may include, but is not limited to: tin dioxide, conductive glass;
the conductive carbon material may include, but is not limited to: graphite, graphene, carbon nanotubes, activated carbon, carbon black;
the semiconductor may include, but is not limited to: silicon or doped silicon.
4. The composite current collector of claim 1, wherein optionally, the lead sheath or lead alloy sheath has a sheet edge and a sheet edge, and a local surface area directly bonded to each other;
or, optionally, the composite current collector may further include an edge sealing material, and the lead skin or the lead alloy skin or the edge of the lead skin or the sheet body and the edge sealing material are bonded to each other.
5. The composite current collector of claim 4, wherein the bonding or combination means may include, but is not limited to: welding, bonding, casting, injection molding connection, pressing, solidifying into a whole after melting, or/and contacting and connecting.
6. The composite current collector of claim 4, wherein the edge sealing material comprises but is not limited to: lead or lead alloy or lead dioxide or lead-containing solder, tin or tin alloy or lead-tin alloy solder or tin-containing solder, tin oxide, doped tin oxide, silicon or doped silicon, titanium, viscose, rubber, silica gel, plastics or polymers, glass, silicon oxide, or composites thereof.
7. The lead-acid battery composite current collector of claim 4, wherein optionally, the edge sealing material is a portion of the lead skin or lead alloy skin.
8. The lead-acid battery composite current collector of claim 4, wherein optionally, a border of the composite current collector is or is the edge sealing material.
9. The composite current collector of claim 1, wherein an anti-corrosion layer is optionally interposed or spaced between the lead sheath or lead alloy sheath and the lightweight conductor, or the surface of the lightweight conductor may be covered with an anti-corrosion layer.
10. A lead-acid battery, including positive pole and positive pole current collector, negative pole and negative pole current collector, characterized by that, said positive pole current collector, negative pole current collector are the lead-acid battery combined type current collector of any claim 1-9.
CN202010821604.8A 2019-08-18 2020-08-15 Lead-acid storage battery composite current collector and battery Pending CN112397721A (en)

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