CN112397720A - Lead-acid storage battery composite current collector and battery - Google Patents
Lead-acid storage battery composite current collector and battery Download PDFInfo
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- CN112397720A CN112397720A CN202010814419.6A CN202010814419A CN112397720A CN 112397720 A CN112397720 A CN 112397720A CN 202010814419 A CN202010814419 A CN 202010814419A CN 112397720 A CN112397720 A CN 112397720A
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- lead
- current collector
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- sheath
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Images
Classifications
-
- 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
- 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
- H01M4/665—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 & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a composite current collector of a lead-acid storage battery, which comprises a lead skin or a lead alloy skin and a bearing body, wherein the lead skin or the lead alloy skin covers the surface of the bearing body or is laminated with the bearing body to form a laminated layer; optionally, the lead-acid battery composite current collector may further include a light conductor, and the light conductor is located on one side of the lower surface of the lead sheath or the lead alloy sheath and is in conductive connection with the lead sheath or the lead alloy sheath or the lower surface thereof; the invention also discloses a lead-acid storage battery comprising the composite current collector; the composite current collector of the lead-acid storage battery disclosed by the invention is relatively low in weight and relatively low in resistance; the lead-acid storage battery disclosed by the invention has the advantages of relatively high gravimetric specific energy, relatively small internal resistance and the like.
Description
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 or lead alloy current collectors have been widely used in the positive and negative electrodes of lead-acid batteries, and their important disadvantages are represented by heavy weight (large specific gravity), high resistance (insufficient 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 small resistance, is beneficial to reducing the weight and the internal resistance of the lead-acid storage battery, and improving the specific energy, the rate capability and the like of the lead-acid storage battery.
In order to solve the technical problems, the invention provides a composite current collector of a lead-acid storage battery, which comprises a lead skin or a lead alloy skin and a bearing body, wherein the lead skin or the lead alloy skin covers the surface of the bearing body or is laminated with the bearing body to form a laminated layer;
the indirect contact means that a gap substance exists between the two indirectly contacted objects, and the gap substance is simultaneously contacted with the two indirectly contacted objects, which is the same as the following.
The lead sheath or lead alloy sheath can be cast, rolled, pressed, rolled, punched, drawn, cut, sheared, or processed by 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 carrier, may include but is not limited to: plastics, plastic composites, rubber, silica gel, wood, bakelite, titanium composites;
the indirect contact or/and connection between the lead sheath or lead alloy subcutaneous surface and the covered and laminated carrier surface means that an interstitial substance exists between the lead sheath or lead alloy subcutaneous surface and the covered and laminated carrier surface, and the interstitial substance is simultaneously in contact with or connected with the lead sheath or lead alloy subcutaneous surface and the covered and laminated carrier surface.
Optionally, the composite current collector of the lead-acid battery may further include a light conductor, that is, a conductor with a specific gravity less than that of lead or a conductor with a density less than 9.0 Kg/L; in the structure of the composite current collector, the light conductor is positioned on one side of the lower surface of the lead sheath or the lead alloy sheath and is in conductive connection with the lead sheath or the lead alloy sheath or the lower surface of the lead sheath or the lead alloy sheath;
the light conductor is positioned on the lower surface of the lead sheath or the lead alloy sheath, between the covered and laminated bearing body surfaces, or in a groove or an opening in the bearing body covered by the lower surface of the lead sheath or the lead alloy sheath or covered by the cage;
and/or the light conductor is in direct contact or/and connection or indirect contact or/and connection with the carrier, the lead skin or the lead alloy skin, and the indirect contact or/and connection means that a gap substance exists between the light conductor and the carrier, the lead skin or the lead alloy skin, and the gap substance is in contact or/and connection with the light conductor, the carrier, the lead skin or the lead alloy skin at the same time.
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;
the gap substance can be an anti-corrosion layer, an edge sealing material, a welding or bonding material and an interlayer buffer transition material;
the anti-corrosion layer, the edge sealing material, the welding or bonding material and the interlayer buffer transition material can include but are not limited to: lead or lead alloys or lead dioxide, Sn, tin oxide, doped tin oxide, tin alloys, silicon or doped silicon, titanium, viscose, rubber, silica gel, plastics, glass, silicon oxide;
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;
alternatively, the adhesive may include, but is not limited to: epoxy resin glue, nitrile rubber and conductive adhesive.
The conductive adhesive, rubber, silica gel, plastic or polymer, glass and silicon oxide can be lead or lead alloy or lead dioxide, tin or tin alloy or tin oxide or doped tin oxide, titanium, conductive carbon material, silicon or doped silicon containing adhesive, rubber, silica gel, plastic or polymer, glass and silicon oxide.
Alternatively, the carrier may be a battery well or a wall of a housing.
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 of the lead-acid storage battery are or comprise the lead-acid storage battery composite current collector; or, the wall of the battery jar or the casing of the lead-acid storage battery is or comprises the carrier.
Advantageous effects
Under the condition that the current collectors are the same in shape and size, the composite current collector of the lead-acid storage battery has smaller weight and lower resistance (or resistance between two points on the current collector) 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 lead or lead alloy material at the local part in the lead or lead alloy current collector body is replaced or replaced by the light conductor and the carrier (the specific gravity of the light conductor is less than lead, or the density of the light conductor is less than 9.0Kg/L, and the specific gravity or the density of the carrier plastic, the plastic composite material, the titanium and the titanium composite material are all less than lead or lead alloy), so the weight of the lead-acid battery composite current collector provided by the invention is inevitably less than that of the lead or lead alloy current collector; when the specific resistance of the lightweight current collector of the invention is smaller than or sufficiently smaller than that of lead or lead alloy, the conductivity of the formed composite current collector may be higher than that of the lead current collector or lead alloy current collector when the local lead or lead alloy material (with larger specific resistance) in the lead or lead alloy current collector is replaced or replaced by the lightweight current collector (with smaller specific resistance or sufficiently smaller specific resistance). 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, higher rate performance and the like compared with 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 view of a composite current collector of a lead-acid battery according to a first embodiment of the composite current collector of the lead-acid battery in example 2 of the present invention.
Fig. 3 is a schematic cross-sectional structure view of a composite current collector of a lead-acid battery according to a second embodiment of the invention in example 2.
Fig. 4 is a schematic cross-sectional structure view of a composite current collector of a lead-acid battery according to a third embodiment of the invention 2.
Fig. 5 is a schematic cross-sectional structure view of a composite current collector of a lead-acid battery according to a fourth embodiment of the composite current collector of the lead-acid battery in example 2 of the present invention.
Fig. 6 is a schematic top view structure diagram of conductive surfaces of the composite current collector of the lead-acid battery, the lead current collector, and the lead-calcium alloy current collector in the first, second, and third embodiments of the composite current collector of the lead-acid battery in example 2 of the present invention.
Fig. 7 is a schematic partial cross-sectional structure view of a lead-acid battery composite current collector with a conductive anti-corrosion layer between a lead skin or a lead alloy skin and a lightweight conductor according to a first embodiment of the lead-acid battery composite current collector in example 3 of the present invention.
Fig. 8 is a schematic partial cross-sectional view of a lead-acid battery composite current collector with a gap between a lightweight conductor and a carrier in a second embodiment of the lead-acid battery composite current collector in example 3 of the present invention.
Fig. 9 is a schematic partial sectional view of a composite current collector of a lead-acid battery, in which a light conductor is covered with a gap material in a third embodiment of the composite current collector of a lead-acid battery according to example 3 of the present invention.
Fig. 10 is a schematic partial cross-sectional view of a lead-acid battery composite current collector in which a light conductor is wrapped by a carrier and is relatively completely enclosed in a fourth embodiment of the lead-acid battery composite current collector according to example 3 of the present invention.
The reference numerals in the figures are illustrated as follows:
1: lead sheath or lead alloy sheath
2: supporting bodies, or plastics
3: light electrical conductor, or aluminium alloy or copper alloy
4: edge sealing material, or lead-tin alloy solder
5: groove wall on bearing body
6: wall surface of supporting body groove wall
7: hole wall surface of bearing body opening
8: one conductive surface of the current collector
9. 10: two position points of a current collector with a distance of length value of the current collector on one conductive surface
11: a location point on the upper surface of the composite current collector, a location point on the upper surface of the lead skin or lead alloy skin of the composite current collector
12: a location point on the lower surface of the composite current collector, or a location point on the lower surface or lower end of the lightweight conductor
13: anti-corrosion layer
14: interstitial substance
100: composite current collector of lead-acid storage battery
200: lead-acid storage battery composite current collector or lead alloy current collector
Detailed Description
The light conductor of the invention refers to a conductor with specific gravity smaller than lead or a conductor with density smaller than 9.0 Kg/L.
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.
Optionally, 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, where 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 plastics in the present embodiment may include, but are not limited to: ABS (acrylonitrile, butadiene, styrene terpolymer), PE (polyethylene), PP (polypropylene), PVC (polyvinyl chloride), PPE (polyphenylene ether), PET (poly-p-phenyleneterephthalate), polyacrylonitrile, nylon, dacron, chinlon, spandex, other plastics, polymers, resins.
The technical content, characteristics and effects of the invention are further detailed in the following embodiments.
Example 1
As shown in fig. 1, the composite current collector for a lead-acid battery in this embodiment includes a lead sheath 1 and a supporting body 2, where the lead sheath 1 covers the surface of the supporting body 2 and forms a lamination with the supporting body 2, in the lamination, one surface, i.e., a lower surface, of the lead sheath 1 is in contact with or/and connected to the surface of the covered supporting body 2, and the supporting body 2 plays a role in mechanically supporting, fixing and supporting the lead sheath 1; the formation is a two-layer stack.
The lead or the material of the lead sheath 1 is industrial No. 1 lead or electrolytic lead, and the lead purity is 99.994 wt.%;
the supporting body 2 is a polyethylene plastic plate;
the lead sheath is processed by physical and mechanical processes such as casting, grinding, pressing, rolling, punching, drawing, cutting, shearing and the like.
The lead sheath 1 is a cuboid and has the following dimensions: the length is 10mm, the width is 1mm, and the thickness is 0.1 mm; the supporting body polyethylene plastic board 2 is also a cuboid, and the size is as follows: the length is 10mm, the width is 1mm, and the thickness is 0.9 mm;
thus, the composite current collector 100 of the lead-acid storage battery of the embodiment is a cuboid, and has a length of 10mm, a width of 1mm, and a thickness of 1 mm.
The physical properties of the lead sheath 1 and the polyethylene plastic plate 2 as a supporting body are known to be shown in table 1.
TABLE 1 physical Properties of the objects
| Resistivity (omega. m,20 ℃ C.) | Density (Kg/L) | |
| EXAMPLE 1 lead sheath | 20.6×10-8 | 11.35 |
| Example 1 polyethylene sheet | Insulator | 0.95 |
| 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 of the embodiment is compared with a lead current collector or a lead-antimony alloy current collector in terms of weight, and the lead current collector or the lead-antimony alloy current collector has the same physical shape and size as the composite current collector of the lead-acid storage battery of the embodiment, namely, the lead current collector or the lead-antimony alloy current collector is a cuboid, and the lead current collector or the lead-antimony alloy current collector is 10mm long, 1mm wide and 1mm thick. The results of the calculations are shown in Table 2.
Table 2 illustrates that: the weight of the composite current collector in table 2 is the weight of the lead sheath + the weight of the polyethylene plastic plate of the support.
As can be seen from the calculation results in table 2, the weight of the composite current collector of the lead-acid storage battery of this embodiment is less than the weight of the lead current collector or the lead-antimony alloy current collector.
In other embodiments of this embodiment, the length or/and the width or/and the thickness of the lead sheath 1, the carrier 2, and the combined current collector, the lead current collector, and the lead-calcium alloy current collector of this embodiment are simultaneously enlarged by more than 10 times or other times, and other aspects are unchanged, then according to the above similar analysis and calculation processes, a similar conclusion can be obtained, that is, the weight of the combined current collector of the lead-acid battery of this embodiment is significantly less than the weight of the lead current collector and the lead-calcium alloy current collector.
In other embodiments of this embodiment, the lead skin in the composite current collector of the lead-acid storage battery of this embodiment may be replaced by a lead-antimony alloy skin (containing 3 wt% antimony) or a lead-tin alloy skin or a lead-rare earth alloy skin or other lead alloy skin with the same shape and size.
In other embodiments of this embodiment, the polyethylene plastic plate in the composite current collector of the lead-acid storage battery of this embodiment may be replaced by a polypropylene plastic plate, a nylon plastic plate, a polyvinyl chloride plastic plate, an ABS plastic plate, a PET plastic plate, or a rubber plate, a wood plate, an bakelite plate, etc. with the same shape and size.
Example 2
The composite current collector of the lead-acid storage battery comprises a lead alloy skin 1, a bearing body 2 and a light conductor 3.
First implementation mode of composite current collector of lead-acid storage battery
As shown in fig. 2, the lead alloy sheet 1, the carrier 2, and the light conductor 3 are laminated with each other, in the laminated layer, the light conductor 3 is located between the lead alloy sheet 1 and the carrier 2 (located on the lower surface side of the lead alloy sheet 1), and the light conductor 3 is in surface contact with or/and connected to the lower surface of the lead alloy sheet 1 and in surface contact with or/and connected to the upper surface of the carrier 2, the laminated layer is also a laminated layer in which the lead alloy sheet 1 and the carrier 2 are in indirect contact with or/and connected to each other through the light conductor 3, and the laminated layer or laminated structure is the composite current collector 100 of the lead-acid battery of the present embodiment.
The supporting body 2 has the functions of mechanical bearing, supporting, fixing and framework support for the lead alloy sheet 1 and the light electric conductor 3.
The lead alloy skin 1 and the supporting body 2 cover the surface of the light conductor 3 through contact or/and connection, and play a role in protecting the light conductor 3: the corrosion and damage of the contacted or/and connected and covered surface of the lightweight electric conductor 3 or the whole lightweight electric conductor 3 by the external environment (or the electrolyte in the external environment) of the composite current collector are prevented and slowed down.
The lead alloy or the material of the lead alloy skin 1 is lead-calcium alloy (containing 0.3-0.6 wt percent of calcium);
the lead alloy skin 1 is a cuboid, and has the following dimensions: the length is 10mm, the width is 1mm, and the thickness is 0.1 mm;
the lead sheath alloy sheath is processed by physical and mechanical processes such as casting, grinding, pressing, rolling, punching, drawing, cutting, shearing and the like.
The supporting body 2 is a polypropylene plastic plate, which is also a cuboid and has the size: the length is 10mm, the width is 1mm, and the thickness is 0.4 mm;
the light electric conductor 3 is an aluminum plate, which is also a cuboid, and has the size: the length is 10mm, the width is 1mm, and the thickness is 0.5 mm;
thus, the formed composite current collector 100 of the lead-acid storage battery of the embodiment is a cuboid, and has the size of 10mm in length, 1mm in width and 1mm in thickness.
Second implementation manner of composite current collector of lead-acid storage battery
The lead-acid battery composite current collector of this embodiment further includes an edge sealing material, as shown in fig. 3, the lead alloy sheet 1, the supporting body 2, and the light conductor 3 are laminated with each other, the light conductor 3 in the laminated layer is located between the lead alloy sheet 1 and the supporting body 2 (located on the lower surface side of the lead alloy sheet 1), and the light conductor 3 is in surface contact with or/and connected to the lower surface of the lead alloy sheet 1 and is in surface contact with or/and connected to the upper surface of the supporting body 2, the laminated layer is also a laminated layer in which the lead alloy sheet 1 and the supporting body 2 are in indirect contact with or/and connected to each other through the light conductor 3, left and right side surfaces of the light conductor 3 in the laminated layer, which are not in surface contact with or/and connected to the lead alloy sheet 1 or the supporting body 2, are in surface contact with or/and connected to, and the edge sealing material 4 is located between the lead alloy sheet 1 and the carrier 2 and is simultaneously in contact with or/and connected with the lower surface of the lead alloy sheet 1 and the upper surface of the carrier 2 (the combination or combination mode can be welding or bonding), so as to form the composite current collector 100 of the lead-acid storage battery of the embodiment.
The supporting body 2 has the functions of mechanical bearing, supporting, fixing and framework support for the lead alloy sheet 1, the light electric conductor 3 and the edge sealing material 4.
The lead alloy skin 1, the supporting body 2 and the edge sealing material 4 cover the surface of the light electric conductor 3 through contact or/and connection, and play a role in protecting the light electric conductor: the corrosion and damage of the contacted or/and connected and covered surface of the lightweight electric conductor 3 or the whole lightweight electric conductor 3 by the external environment (or the electrolyte in the external environment) of the composite current collector are prevented and slowed down.
Alternatively, it is conceivable that when the lead alloy skin 1, the carrier 2, and the edge sealing material 4 in the laminated structure are combined with each other to form a closed space, and the lightweight electrical conductor 3 in the laminated structure is located in the closed space, the lightweight electrical conductor 3 will be completely isolated from the external environment of the composite current collector (or the electrolyte in the external environment), so as to be more beneficial to preventing and slowing down the corrosion and damage of the lightweight electrical conductor 3 by the external environment of the composite current collector (or the electrolyte in the external environment).
The lead alloy or the material of the lead alloy skin 1 is lead-calcium alloy (containing 0.03-0.09 wt percent of calcium);
the lead alloy skin 1 is a cuboid, and has the following dimensions: the length is 10mm, the width is 1mm, and the thickness is 0.1 mm;
the lead sheath alloy sheath is processed by physical and mechanical processes such as casting, grinding, pressing, rolling, punching, drawing, cutting, shearing and the like.
The supporting body 2 is a polypropylene plastic plate, which is also a cuboid and has the size: the length is 10mm, the width is 1mm, and the thickness is 0.4 mm;
the light electric conductor 3 is an aluminum plate, which is also a cuboid, and has the size: the length is 10mm, the width is 0.8mm, and the thickness is 0.5 mm;
the edge sealing material 4 is lead-calcium alloy (containing 0.03-0.09 wt%) which is also cuboid and has the size: the length is 10mm, the width is 0.5mm, and the thickness is 0.1 mm;
thus, the formed composite current collector 100 of the lead-acid storage battery of the embodiment is a cuboid, and has the size of 10mm in length, 1mm in width and 1mm in thickness.
Third implementation manner of the composite current collector of the lead-acid storage battery
As shown in fig. 4, the lower surface of the lead alloy sheath 1 covers the upper surface of the carrier 2 and the two are in surface contact or/and connected with each other to form a laminated layer, in which the lightweight conductor 3 is located between the lead alloy sheath 1 and the carrier 2 (located on the lower surface side of the lead alloy sheath 1) and the lightweight conductor 3 is in surface contact or/and connected with the lower surface of the lead alloy sheath 1, and the lightweight conductor 3 is located in a groove in the carrier 2 covered by the lower surface of the lead alloy sheath 1 or covered by the carrier and in surface contact or/and connected with the surface 6 of the groove wall 5 of the carrier 2, thereby forming the composite current collector 100 of the lead-acid battery of the embodiment.
The supporting body 2 has the functions of mechanical bearing, supporting, fixing and framework support for the lead alloy sheet 1 and the light electric conductor 3.
The lead alloy skin 1 and the wall 5 of the groove wall of the bearing body cover the surface of the light electric conductor 3 through contact or/and connection, and play a role in protecting the light electric conductor 3: the corrosion and damage of the contacted or/and connected and covered surface of the lightweight electric conductor 3 or the whole lightweight electric conductor 3 by the external environment (or the electrolyte in the external environment) of the composite current collector are prevented and slowed down.
Optionally, it is conceivable that, when the lead alloy skin 1 and the supporting body groove wall 5 in the laminated structure are combined with each other to form a closed space, and the lightweight conductor 3 in the laminated structure is located in the closed space, or the lead alloy skin 1 and the supporting body groove wall 5 achieve omnibearing contact or/and connection, and coverage on the lightweight conductor 3, the lightweight conductor 3 will be completely isolated from the external environment of the composite current collector (or the electrolyte in the external environment), so as to be more beneficial to preventing and slowing down corrosion and damage of the lightweight conductor 3 by the external environment of the composite current collector (or the electrolyte in the external environment).
The lead alloy or the material of the lead alloy skin 1 is lead-calcium alloy (containing 0.03-0.09 wt percent of calcium);
the lead alloy skin 1 is a cuboid, and has the following dimensions: the length is 10mm, the width is 1mm, and the thickness is 0.1 mm;
the lead sheath alloy sheath is processed by physical and mechanical processes such as casting, grinding, pressing, rolling, punching, drawing, cutting, shearing and the like.
The supporting body 2 is a polypropylene plastic plate, is a cuboid with a groove, and the size of the cuboid is as follows: the length is 10mm, the width is 1mm, and the thickness is 0.9 mm; the recess in the polyethylene plastic slab also is the cuboid, and its size is: the length is 10mm, the width is 0.5mm, and the thickness is 0.5 mm;
the light electric conductor 3 is an aluminum plate, which is also a cuboid, and has the size: the length is 10mm, the width is 0.5mm, and the thickness is 0.5 mm;
thus, the formed composite current collector 100 of the lead-acid storage battery of the embodiment is a cuboid, and has the size of 10mm in length, 1mm in width and 1mm in thickness.
Fourth embodiment of the composite current collector for lead-acid battery of this embodiment
As shown in fig. 5, the lower surface of the lead alloy sheath 1 covers the upper surface of the carrier 2 and the two are in surface contact or/and connected with each other to form a laminated layer, in the laminated layer, the light conductor 3 is located on the lower surface side of the lead alloy sheath 1, and the light conductor 3 is in surface contact or/and connected with the lower surface of the lead alloy sheath 1, and the light conductor 3 is located in an opening in the carrier 2 covered or covered by the lower surface of the lead alloy sheath 1 and in surface contact or/and connected with the hole wall surface 7 of the opening of the carrier 2, thereby forming the composite lead-acid battery current collector 100 according to the embodiment.
The supporting body 2 has the functions of mechanical bearing, supporting, fixing and framework support for the lead alloy sheet 1 and the light electric conductor 3.
The lead alloy skin 1 and the inner surface of the opening of the bearing body are in contact with or/and connected with and cover the surface of the light conductor 3, so that the light conductor 3 is protected: the corrosion and damage of the contacted or/and connected or covered light conductor 3 surface or the light conductor 3 by the external environment (or the electrolyte in the external environment) of the composite current collector are prevented and slowed down.
The lead alloy or the material of the lead alloy skin 1 is lead-calcium alloy (containing 0.03-0.09 wt percent of calcium);
the lead alloy skin 1 is a cuboid, and has the following dimensions: the length is 10mm, the width is 1mm, and the thickness is 0.1 mm;
the lead sheath alloy sheath is processed by physical and mechanical processes such as casting, grinding, pressing, rolling, punching, drawing, cutting, shearing and the like.
The supporting body 2 is a polypropylene plastic plate and is a cuboid with an opening, and the size of the cuboid is as follows: the length is 10mm, the width is 1mm, and the thickness is 0.4 mm; the trompil is the square hole, and its size is: the size of the square hole is as follows: 5mm long, 0.5mm wide and 0.9mm deep.
The light electric conductor 3 is an aluminum plate, which is also a cuboid, and has the size: the length is 5mm, the width is 0.5mm, and the thickness is 0.9 mm;
thus, the formed composite current collector 100 of the lead-acid storage battery of the embodiment is a cuboid, and has the size of 10mm in length, 1mm in width and 1mm in thickness.
The weight performance of the composite current collector of the lead-acid storage battery is compared with that of the lead current collector and the lead alloy current collector
Under the condition that current collector shape, size, volume are the same, compare this embodiment lead acid battery combined type current collector with the plumbous mass flow body, the plumbous alloy mass flow body, promptly, the shape of plumbous mass flow body, plumbous alloy mass flow body is the cuboid, and the size is: the length is 10mm, the width is 1mm, and the thickness is 1 mm.
The physical properties of the lead-calcium alloy skin 1 (containing 0.03 to 0.09 wt% of calcium), the supporting polypropylene plastic plate 2, the light conductor aluminum 3, the edge sealing material lead-tin alloy solder 4, the lead current collector and the lead-calcium alloy (containing 0.03 to 0.09 wt% of calcium) are shown in table 3.
TABLE 3 physical Properties of the objects
According to the physical properties of the objects shown in table 3 and the structures of the combined current collector of the lead-acid storage battery in the first, second, third, and fourth embodiments of the present embodiment, the weights of the combined current collector, the lead current collector, and the lead alloy of the lead-acid storage battery in the present embodiment can be obtained through calculation, and the results are listed in table 4.
TABLE 4 weight of the objects
| Weight mg | |
| Example 2 implementation of a composite current collector | 28.44 |
| Example 2 embodiment two composite current collectors | <37.09 |
| Example 2 embodiment three composite current collectors | 23.97 |
| Example 2 embodiment four composite current collectors | 23.52 |
| Lead current collector | 113.5 |
| Lead-antimony alloy current collector | 111 |
Table 4 is to be explained as follows:
example 2 an embodiment of the present invention provides a composite current collector, which has a total weight of the lead alloy sheath 1, the carrier 2, and the light conductor 3;
example 2, the weight of the second composite current collector is the sum of the weights of the lead alloy skin 1, the carrier 2, the light conductor 3, and the edge sealing material 4 in the composite current collector;
example 2 the weight of the triple composite current collector is the sum of the weights of the lead alloy skin 1, the carrier 2 and the light conductor 3 in the composite current collector;
example 2 the weight of the four-layer current collector is the sum of the weights of the lead alloy sheath 1, the carrier 2 and the light conductor 3 in the four-layer current collector.
As can be seen from table 4, the weight of the combined current collector of the lead-acid storage battery in the first, second, third and fourth embodiments of the present invention is significantly less than that of the compared lead current collector and lead-calcium alloy current collector (containing 0.03-0.09 wt% of calcium).
The resistance performance of the composite current collector of the lead-acid storage battery is compared with that of the lead current collector and the lead alloy current collector
Under the condition that current collector shape, size, volume are the same, compare this embodiment lead acid battery combined type current collector with the plumbous mass flow body, the plumbous alloy mass flow body, promptly, the shape of plumbous mass flow body, plumbous alloy mass flow body is the cuboid, and the size is: the length is 10mm, the width is 1mm, and the thickness is 1 mm.
The physical properties of the lead-calcium alloy skin 1 (containing 0.03 to 0.09 wt% of calcium), the supporting polypropylene plastic plate 2, the light conductor aluminum 3, the edge sealing material lead-tin alloy solder 4, the lead current collector and the lead-calcium alloy (containing 0.03 to 0.09 wt% of calcium) are shown in table 3.
For the combined current collectors, the lead current collectors, and the lead alloy current collectors of the first, second, and third lead-acid batteries in this embodiment, as shown in fig. 6, resistances between two position points 9 and 10 on one conductive surface 8 of each current collector, where the distance between the two position points is the length of the current collector, are compared. For the first, second, and third lead-acid battery composite current collectors according to the embodiment of this embodiment, the two position points 9 and 10 are located on the upper surface of the lead alloy sheath (which is a conductive surface) at the same time, for the lead current collector and the lead alloy current collector, the two position points 9 and 10 may be located on any one of four planes (current collector planes) parallel to the length direction of the current collector at the same time, on the other hand, the position points 9 and 10 are points on the radial cross section of the current collector at the positions thereof (the radial cross section is perpendicular to the length direction of the current collector, and the radial cross sections are sequentially referred to as the current collector radial cross section marked by the position point 9 and the current collector radial cross section marked by the position point 10), and the radial cross section of the electrical conductor included in the current collector radial cross section marked by the position point 9 or 10 (the radial cross section of the electrical conductor is perpendicular to the length direction of the current collector or the electrical conductor A radial cross section of the conductor, wherein, in the radial cross section of the conductor marked by the position point 9 or 10 of the combined current collector of the first, second, and third lead-acid batteries in this embodiment, the radial cross section of the lead alloy sheath marked by the position point 9 or 10, the radial cross section of the lightweight conductor, and the radial cross section of the edge sealing material (the radial cross section exists only in the combined current collector of the second embodiment) are included, and the radial cross section of the conductor marked by the position point 9 or 10 of the lead current collector, the lead-calcium alloy current collector is the radial cross section of the current collector marked by the position point 9 or 10; the resistance between the radial sections of the conductors marked by the position point 9 and the radial sections of the conductors marked by the position point 10 in the current collector is referred to as the resistance between the radial sections of the conductors marked by the position points 9 and 10, the resistance is related to the distance between the position points 9 and 10, and the resistance is larger when the distance is larger; in this embodiment, since the resistances between the position points 9 or 10 on each current collector and the radial cross sections of the conductors marked thereon are substantially equivalent to each other (or the resistance is in a case that the resistance is < of the lead current collector or the lead-calcium alloy current collector of the composite current collector) or/and is very small (as can be known from calculation or measurement, and the contact or/and connection resistances between the lead-calcium alloy skin, the light-weight conductor aluminum, and the edge-sealing material lead-tin alloy solder are ignored in the calculation or measurement process) with respect to the resistances between the radial cross sections of the conductors marked on the position points 9 and 10 on each current collector, the resistance between the two points 9 and 10 on each current collector is ignored in the present resistance performance comparison, and thus the comparison of the resistances between the radial cross sections of the conductors marked on the position points 9 and 10 on each current collector is equivalent to the comparison of the resistances. And the results of comparing the resistance properties are shown in table 5.
TABLE 5
| The resistance between the radial sections of the conductors marked by the |
|
| Example 2 implementation of a composite current collector | 0.508 |
| Example 2 embodiment two composite current collectors | 0.605 |
| Example 2 embodiment three composite current collectors | 0.993 |
| Lead current collector | 2.06 |
| Lead-antimony alloy current collector | 2.2 |
Table 5 is to be explained:
1) in an embodiment of the present invention, the resistance between the radial cross sections of the conductors marked by the position points 9 and 10 of the composite current collector is a parallel resistance value formed by connecting in parallel the resistance between the radial cross sections of the lead alloy sheath 1 marked by the position points 9 and 10 in the composite current collector and the resistance between the radial cross sections of the light conductor aluminum 3 marked by the position points 9 and 10 in the composite current collector;
2) in the second composite current collector in the embodiment of this embodiment, the resistance between the radial cross sections of the conductors marked by the position points 9 and 10 is equal to the resistance between the radial cross sections of the lead alloy sheet 1 marked by the position points 9 and 10 in the composite current collector, the resistance between the radial cross sections of the light conductor aluminum 3 marked by the position points 9 and 10 in the composite current collector, the edge sealing material lead-tin alloy solder 4 marked by the position points 9 and 10 in 1 composite current collector, and the edge sealing material lead-tin alloy solder 4 marked by the position points 9 and 10 in the other composite current collector, which are connected in parallel, to form a parallel resistance;
3) in the three composite current collectors of the embodiment of the present invention, the resistance between the radial cross sections of the conductors marked by the position points 9 and 10 is equal to the parallel resistance formed by connecting the resistance between the radial cross sections of the lead alloy sheet 1 marked by the position points 9 and 10 in the composite current collector and the resistance between the radial cross sections of the light conductor aluminum 3 marked by the position points 9 and 10 in the composite current collector in parallel;
4) the contact or/and connection resistance among the lead-calcium alloy skin, the light electric conductor aluminum and the edge sealing material lead-tin alloy solder is ignored.
5) The resistance between the radial sections of the conductors marked by the position points 9 and 10 of the lead current collector is equal to the resistance between the radial sections of the lead current collectors marked by the position points 9 and 10 in the lead current collector;
6) the resistance between the radial sections of the conductors marked by the position points 9 and 10 of the lead-calcium alloy current collector is equal to the resistance between the radial sections of the lead-calcium alloy current collector marked by the position points 9 and 10 in the lead-calcium alloy current collector;
as can be seen from table 5, in this embodiment, the resistance between the radial cross sections of the conductors marked by the position points 9 and 10 of the composite current collector of each lead-acid battery or the resistance between the position points 9 and 10 of the composite current collector of each lead-acid battery is significantly lower than the resistance between the radial cross sections of the conductors marked by the position points 9 and 10 of the lead current collector or the lead-calcium alloy current collector or the resistance between the position points 9 and 10 of the composite current collector of each lead-acid battery.
It can be seen that, in the battery, under the same conditions, the electrode active material is in contact with or/and connected to the upper surface of the lead-calcium alloy sheath (the surface of the conductor where the position points 9, 10 are located) of the composite current collector of the lead-acid storage battery of this embodiment, so that the current conduction resistance between the electrode active materials in contact with or/and connected to the position points 9, 10 of the composite current collector of this embodiment is significantly smaller than the current conduction resistance between the electrode active materials in contact with or/and connected to the position points 9, 10 of the lead current collector or the lead alloy current collector, which is beneficial to reducing the internal resistance of the battery.
For the combined current collector, the lead current collector, and the lead alloy current collector of the four-lead-acid battery according to the embodiment of the present invention, the resistances of the conductors in the current collectors in the thickness direction of the current collectors are compared. The results of the resistance comparison are listed in table 6.
TABLE 6
| Resistance u omega of electric conductor in current collector in thickness direction of current collector | |
| Example 2 embodiment four composite current collectors | 11.56 |
| Lead current collector | 20.6 |
| Lead-antimony alloy current collector | 22 |
Table 6 is to be explained as follows:
1) as shown in fig. 5, in the four-layer current collector of the embodiment of the present invention, the resistance of the electrical conductor in the thickness direction of the current collector is equal to the resistance of the lead alloy sheath 1 in the thickness direction thereof + the resistance of the light electrical conductor aluminum in the thickness direction thereof (i.e., the depth direction of the open hole in fig. 5, or the direction from the position 11 on the upper surface of the compound current collector to the position 12 on the lower surface of the compound current collector in fig. 5); the resistance calculations listed in table 6 ignore the contact or/and connection resistance between the lead alloy skin and the light conductor aluminum.
2) The resistance of the electric conductor in the lead current collector or the lead-calcium alloy current collector in the thickness direction of the current collector is equal to the resistance between the upper plane and the lower plane of the lead current collector or the lead-calcium alloy current collector which are vertical to the thickness direction of the current collector.
As can be seen from table 6, the resistance of the electrical conductor in the four composite current collectors of the embodiment in the thickness direction of the current collector is significantly smaller than the resistance of the electrical conductor in the lead current collector or the lead calcium alloy current collector in the thickness direction of the current collector.
As can be seen from the above analysis, in practical applications, the upper surface 11 of the lead-calcium alloy of the four-layer composite current collector of the embodiment of the present invention may be in contact with the electrode active material, and the lower surface or the lower end 12 of the light conductive body 3 in the opening thereof may be used for the bus connection (electrode connection in the same cell) or the bridging connection (electrode connection between different cells) in the battery, so as to significantly reduce the bus connection resistance and the bridging connection resistance; when applied to bridging connection, the carrier 2 in the four-layer composite current collector of this embodiment may be a wall (casing wall or casing wall) or a part of a wall of a battery casing or a battery casing.
In practical application, the contact or/and connection resistance between the lead-calcium alloy sheath, the light-weight conductive aluminum and the edge sealing material lead-tin alloy solder can be made small enough by adjusting the connection process or the combination process, for example, the resistance value of the connection resistance in the thickness direction of the current collector is less than 1 × 10-6Ω－5×10-6And omega, the other conditions are similar, so that the conclusion of the results of the resistance performance comparison of the composite current collector of the lead-acid storage battery of the embodiment with the lead current collector and the lead-calcium alloy current collector is similar or unchanged.
In other embodiments of this embodiment, the lengths and/or widths and/or thicknesses of the lead alloy sheath 1, the carrier 2, the light aluminum conductor 3, the edge sealing material lead-tin alloy solder 4, the composite current collector, the lead current collector, and the lead-antimony alloy current collector are enlarged by more than 10 times or other times, and otherwise unchanged, according to the similar analysis and calculation processes described above, similar conclusions can be obtained: that is, under the condition that the shape and the size of the current collectors are the same, the weight and the resistance of the composite current collector of the lead-acid storage battery of the embodiment are lower than those of the lead current collector or the lead alloy current collector.
In other practical manners of this embodiment, the lead-calcium alloy skin 1 in the composite current collector of the lead-acid storage battery of this embodiment may be replaced by a lead skin or a lead-antimony alloy skin or a lead-calcium-tin-aluminum alloy skin or a lead-rare earth-silver alloy skin with the same shape and size.
In other embodiments of this embodiment, the polypropylene plastic plate in the composite current collector of the lead-acid storage battery of this embodiment may be replaced by a polyethylene plastic plate, a nylon plastic plate, a polyvinyl chloride plastic plate, an ABS plastic plate, a PET plastic plate, or a rubber plate, a wood plate, an bakelite plate, etc. with the same shape and size.
In other embodiments of this embodiment, the light-weight conductive aluminum 3 in the composite current collector of the lead-acid battery of this embodiment can 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 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 a first embodiment of the composite current collector of the lead-acid battery of this embodiment, as shown in fig. 7, in the composite current collector 100 of the lead-acid battery of this embodiment, a conductive anti-corrosion layer 13 is spaced or inserted between the light conductor aluminum 3 and the lead skin or the lead alloy skin 1 to form a laminated structure (the anti-corrosion layer 13 covers the surface of the light conductor aluminum 3), the light conductor aluminum 3 is conductively connected to the lead skin or the lead alloy skin 1 through the anti-corrosion layer 13,
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 second embodiment of the composite current collector of the lead-acid battery of this embodiment, as shown in fig. 8, the current collector 100 of the lead-acid battery of this embodiment further includes an interstitial substance 14, and the interstitial substance 14 is interposed between the light conductor 3 and the carrier 2, and is in contact with or/and connected to the light conductor 3, the carrier 2, the lead sheath or the lead alloy sheath 1. The gap substance 14 can seal the surface and the whole body of the light conductor 3, buffer mechanical acting force or vibration, prevent contact with external corrosive substances and prevent corrosion and the like.
The interstitial substance 14 may be an edge sealing material or a corrosion protection layer, i.e. may be: 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 of the above, one or more thereof.
In a third embodiment of the composite current collector of the lead-acid battery of this embodiment, as shown in fig. 9, the current collector 100 of the lead-acid battery of this embodiment further includes an interstitial substance 14, and the interstitial substance 14 covers a plurality of surfaces or the whole surface of the light conductor 3, is interposed between the light conductor aluminum 3 and the carrier 2, and between the light conductor 3 and the lead sheath or lead alloy sheath 1, and is in contact with or/and connected to the light conductor 3, the carrier 2, the lead sheath or lead alloy sheath 1. The gap substance 14 can seal the surface and the whole body of the light conductor 3, buffer mechanical acting force or vibration, prevent contact with external corrosive substances and prevent corrosion and the like.
In a fourth embodiment of the composite current collector for a lead-acid battery of this embodiment, as shown in fig. 10, a current collector 100 for a lead-acid battery of this embodiment further includes an interstitial substance 14; in the structure, the light conductor 3 is almost completely wrapped and closed by the carrier, and the light conductor 3 is only indirectly contacted or/and connected with the lower surface of the lead sheath or lead alloy sheath 1 through the gap substance 14 in a narrow gap (the width of the gap is smaller than that of the light conductor) in the carrier, namely, the gap substance 14 is between the light conductor 3 and the lead sheath or lead alloy sheath 1 and is simultaneously contacted or/and connected with the light conductor 3 and the lead sheath or lead alloy sheath 1. In this structure, the lightweight electric conductor is relatively completely enclosed by the carrier, so that the lightweight electric conductor 3 is prevented from contacting with corrosive substances (such as electrolyte) in the external environment of the current collector, and thus the lightweight electric conductor 3 is prevented or slowed down from being corroded and damaged by the corrosive substances (such as electrolyte) in the external environment.
The interstitial substance 14 may be an edge sealing material or a corrosion protection layer, i.e. may be: 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 of the above, one or more thereof.
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. The utility model provides a lead acid battery combined type mass flow body, its characterized in that, the combined type mass flow body includes lead skin or lead alloy skin, supporting body, thereby lead skin or lead alloy skin cover on the supporting body surface or with the supporting body stromatolite form the stromatolite, in the stromatolite, a surface of lead skin or lead alloy skin, namely, the lower surface, with by the supporting body surface direct contact or/and be connected or indirect contact or/and be connected of covering, stromatolite, the supporting body plays the effect that mechanical bearing, support, fixed, skeleton bracket carried to lead skin or lead alloy skin.
2. The composite current collector of claim 1, wherein the lead sheath or lead alloy sheath is cast, rolled, stamped, drawn, cut, sheared, or otherwise physically or mechanically processed;
the carrier, may include but is not limited to: plastics, plastic composites, rubber, silica gel, wood, bakelite, titanium composites;
the indirect contact or/and connection between the lead sheath or lead alloy subcutaneous surface and the covered and laminated carrier surface means that an interstitial substance exists between the lead sheath or lead alloy subcutaneous surface and the covered and laminated carrier surface, and the interstitial substance is simultaneously in contact with or/and connected with the lead sheath or lead alloy subcutaneous surface and the covered and laminated carrier surface.
3. The composite current collector of claim 1, further comprising light conductors, i.e. conductors with a specific gravity less than that of lead or conductors with a density less than 9.0 Kg/L; in the structure of the composite current collector, the light conductor is positioned on one side of the lower surface of the lead sheath or the lead alloy sheath and is in conductive connection with the lead sheath or the lead alloy sheath or the lower surface of the lead sheath or the lead alloy sheath.
4. The lead acid battery composite current collector of claim 3, wherein the lightweight electrical conductors are located between the lead skin or lead alloy subsurface surface, the covered, laminated carrier surface, or in a recess or opening in the carrier body covered or covered by the lead skin or lead alloy subsurface surface;
and/or the light conductor is in direct contact or/and connection or indirect contact or/and connection with the carrier, the lead skin or the lead alloy skin, and the indirect contact or/and connection means that a gap substance exists between the light conductor and the carrier, the lead skin or the lead alloy skin, and the gap substance is in contact or/and connection with the light conductor, the carrier, the lead skin or the lead alloy skin at the same time.
5. The composite current collector of claim 3, wherein the 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.
6. The composite current collector of claim 1 or 4, wherein the interstitial material is selected from the group consisting of an anti-corrosion layer, an edge sealing material, a welding or bonding material, and an interlayer buffer transition material; the anti-corrosion layer, the edge sealing material, the welding or bonding material and the interlayer buffer transition material can include but are not limited to: lead or lead alloys or lead dioxide, Sn, tin oxide, doped tin oxide, tin alloys, silicon or doped silicon, titanium, glue, rubber, silica gel, plastics or polymers, glass, silicon oxide.
7. The composite current collector of claim 6, wherein said adhesive, rubber, silicone, plastic or polymer, glass, silica, may include but is not limited to: conductive glue, rubber, silicone, plastic or polymer, glass, silica;
alternatively, the adhesive may include, but is not limited to: epoxy resin glue, nitrile rubber and conductive adhesive.
8. The composite current collector of claim 7, wherein the conductive adhesive, rubber, silica gel, plastic or polymer, glass, or silica is selected from the group consisting of lead or lead alloy or lead dioxide, tin or tin alloy or tin oxide or doped tin oxide, titanium containing adhesive, conductive carbon containing material, silicon or doped silicon containing adhesive, rubber, silica gel, plastic or polymer, glass, or silica.
9. The composite current collector of any one of claims 1 to 4, wherein the carrier is a wall of a battery can or case.
10. A lead-acid battery, including positive pole and positive pole current collector, negative pole and negative pole current collector, characterized by that, the positive pole current collector, negative pole current collector of the said lead-acid battery are or include the combined type current collector of lead-acid battery of any claim 1-5; or, the wall of the battery container or the casing of the lead-acid storage battery is or comprises the carrier body of any one of claims 1-2 and 4.
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| CN201910761323 | 2019-08-17 | ||
| CN201910761149 | 2019-08-17 | ||
| CN2019107613235 | 2019-08-17 | ||
| CN2019107611494 | 2019-08-17 | ||
| CN202010077527X | 2020-01-30 | ||
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