CN110247022B - SMT (surface mount technology) chip battery and pole piece and manufacturing method of SMT chip battery and pole piece - Google Patents

SMT (surface mount technology) chip battery and pole piece and manufacturing method of SMT chip battery and pole piece Download PDF

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CN110247022B
CN110247022B CN201910548733.1A CN201910548733A CN110247022B CN 110247022 B CN110247022 B CN 110247022B CN 201910548733 A CN201910548733 A CN 201910548733A CN 110247022 B CN110247022 B CN 110247022B
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pole piece
material layer
smt patch
layer
hole
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CN110247022A (en
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陈志勇
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0404—Methods of deposition of the material by coating on electrode collectors
    • H—ELECTRICITY
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    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/134—Electrodes based on metals, Si or 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • H01M4/1395—Processes of manufacture of electrodes based on metals, Si or 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • H01M4/1397—Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • General Chemical & Material Sciences (AREA)
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  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses an SMT paster battery and a pole piece and a manufacturing method of the battery and the pole piece, comprising the following steps: uniformly mixing an electrode active material and a first binder to form slurry, attaching the slurry to a wire mesh, and pressing to form an electrode plate; curing the electrode active material; forming a first through hole in the solidified electrode plate, and arranging an insulating material layer on the inner wall of the first through hole; and forming a second through hole on the electrode plate, and arranging a conductor layer on the inner wall of the second through hole. The invention has the technical effect that the manufacturing process of the patch battery is simplified.

Description

SMT (surface mount technology) chip battery and pole piece and manufacturing method of SMT chip battery and pole piece
Technical Field
The invention relates to the technical field of surface mount device (SMT) patch batteries, in particular to an SMT patch battery, a pole piece and manufacturing methods of the SMT patch battery and the pole piece.
Background
With the progress of technology, electronic products tend to be miniaturized more and more, and the electronic products generally need to be powered by batteries. In order to adapt to the trend of miniaturization of electronic products, batteries are generally made to be non-detachable. Since the patch battery can be set in different shapes according to the internal structure of the electronic product, the patch battery is widely applied to the electronic product. The electrode plate of the existing patch battery is generally coated with an electrode active material on a membrane material by a coating method.
However, the existing patch battery manufacturing method is complicated in process and low in structural strength of the polar plate. The materials used by the patch battery limit the performance improvement of the existing patch battery and can not meet the requirement of patch battery upgrading.
Therefore, a new technical solution is needed to solve the above problems.
Disclosure of Invention
The invention aims to provide an SMT patch battery and a pole piece and a new technical scheme of manufacturing methods of the battery and the pole piece.
According to a first aspect of the present invention, a method for manufacturing a pole piece of an SMT patch battery is provided, including:
uniformly mixing an electrode active material and a first binder to form slurry, attaching the slurry on a wire mesh, and pressing to form an electrode plate;
curing the electrode active material;
forming a first through hole in the solidified electrode plate, and arranging an insulating material layer on the inner wall of the first through hole;
and forming a second through hole on the electrode plate, and arranging a conductor layer on the inner wall of the second through hole.
Alternatively, the electrode active material is a material including lithium ions, and a separator material layer is provided on at least one surface of the electrode plate in the thickness direction, the separator material layer being a porous layer that selectively passes lithium ions.
According to another aspect of the present invention, there is provided a pole piece of an SMT patch battery, including an electrode plate, the electrode plate including a wire mesh and an electrode active material attached on the wire mesh, the electrode active material being press-molded and cured on the wire mesh, the electrode plate being provided with a first through hole and a second through hole; the inner wall of the first through hole is provided with an insulating material layer, and the inner wall of the second through hole is provided with a conductor layer.
Alternatively, the electrode active material is a material including lithium ions, and a separator material layer is provided on at least one surface of the electrode plate in the thickness direction, the separator material layer being a porous layer that selectively passes lithium ions.
Optionally, the electrode active material is LiCoO2、LiFePO4、LiMn2O4At least one of (1).
Optionally, the electrode active material is at least one of graphite and silicon.
According to another aspect of the present invention, there is provided a method for manufacturing an SMT patch battery, including:
the manufacturing method of the pole piece of the SMT patch battery is adopted to manufacture the positive pole piece, wherein the electrode active material is a positive active material containing lithium ions; the manufacturing method of the pole piece of the SMT paster battery is adopted to manufacture the negative pole piece, wherein the electrode active material is a negative pole active material;
forming a separator layer on a surface of at least one of the positive electrode tab and the negative electrode tab in a thickness direction, wherein the separator layer is a porous layer that selectively passes lithium ions;
coating electrolyte on the surfaces of the positive plate and the negative plate, and/or soaking the positive plate and the negative plate in the electrolyte;
alternately arranging the positive plates and the negative plates to form a laminated structure, wherein the isolating material layer is positioned between the adjacent positive plates and the adjacent negative plates, the parts of the isolating material layer corresponding to the first through holes and the second through holes of the positive plates are hollowed out, the first through holes of the positive plates are opposite to the second through holes of the negative plates to form a first channel, and the second through holes of the positive plates are opposite to the first through holes of the negative plates to form a second channel;
pressing the laminated structure together;
and respectively arranging conductive materials in the first channel and the second channel, wherein the conductive materials are connected with the conductor layers in the corresponding channels.
Optionally, after the step of disposing the conductive material in the first channel and the second channel respectively, the method further includes:
placing the laminated structure into a mold;
and injecting an insulating protective layer outside the laminated structure.
According to another aspect of the present invention, there is provided an SMT patch battery including a cell including the electrode active material LiCoO2、LiFePO4、LiMn2O4The electrode active material is graphite and an isolating material layer arranged between the two electrode plates;
the electrode active material is LiCoO2、LiFePO4、LiMn2O4The pole piece of at least one of the positive pole pieces is a positive pole piece, the pole piece with the electrode active material being graphite is a negative pole piece, the positive pole piece and the negative pole piece are alternately arranged to form a laminated structure, the parts of the isolating material layer corresponding to the first through hole and the second through hole of the positive pole piece are hollowed out, the first through hole of the positive pole piece is opposite to the second through hole of the negative pole piece to form a first channel, and the second through hole of the positive pole piece is opposite to the first through hole of the negative pole piece to form a second channel; and conductive materials are respectively arranged in the first channel and the second channel and are connected with the conductor layers in the corresponding channels.
Optionally, an insulating protective layer is formed outside the battery core through injection molding.
According to one embodiment of the disclosure, the SMT preparation method is applied to the patch battery, and the method greatly simplifies the preparation process of the patch battery.
In addition, the pole piece has high structural strength.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a cross-sectional view of a cell of an SMT patch battery according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural view of one surface of a pole piece of one embodiment of the present disclosure.
Fig. 3 is a cross-sectional view of a pole piece of one embodiment of the present disclosure.
Fig. 4 is a cross-sectional view of an SMT patch battery according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
According to an embodiment of the present disclosure, as shown in fig. 2 to 3, a method for manufacturing a pole piece of an SMT patch battery is provided, including:
uniformly mixing the electrode active material 11 and the first binder to form a slurry, attaching the slurry to the wire mesh 12, and pressing into the electrode plate 1, for example, pressing the slurry and the wire mesh 12 together into the electrode plate 1 by using an extrusion device;
curing the electrode plate 1;
forming a first through hole 6 on the solidified electrode plate 1, and arranging an insulating material layer 4 on the inner wall of the first through hole 6;
the electrode plate is provided with a second through hole 7, and the inner wall of the second through hole is covered with a conductor layer 5.
In this embodiment, the primary component of the first binder is PVDF, i.e., a linear crystalline vinylidene fluoride polymer. The viscosity of the first binder is 3-5 Pascal.s (1 Pa.s). The PVDF is dissolved in a solvent to form a first binder. For example, the solvent is acetone, NMP, or the like.
The material of the wire mesh 12 is gold, copper, silver, aluminum, titanium, magnesium or an alloy of the above metals. The metal wire mesh is a three-dimensional mesh structure formed by weaving. For example, the wire mesh 12 has a pore diameter of 120 to 150mm and a porosity of 100 to 120 mesh. Within the above range, the structural strength of the wire-net 12 is high, and more electrode active material can be attached.
In addition, the wire-net 12 can function as a conductor.
For example, the thickness of the electrode plate is 0.05mm to 0.5 mm. The electrode plate is of a sheet structure. The overall shape of the electrode plate may be, but is not limited to, rectangular, circular, triangular, diamond, oval, etc. Here, one electrode plate of one type of patch battery may be formed; alternatively, a single plate may be formed and then cut into a unit cell having a predetermined shape according to the size of the different types of the chip batteries. In one example, the volatilizable component of the first binder is removed by means of high-temperature baking, thereby curing the electrode plate. Of course, depending on the composition of the first binder, the curing may be performed by drying at room temperature.
And the first through hole and the second through hole are formed in the solidified electrode plate. The first through hole and the second through hole are close to two end parts of the rectangular unit chip along the length direction and are in the middle position of the width direction. Wherein an insulating material layer is disposed within the first via. The insulating material layer functions as insulation. The insulating material layer is made of plastic, glass, ceramic, rubber and the like. And arranging a conductor layer on the inner wall of the second through hole. When energized, the conductor layer is in electrical communication with the electrode active material and/or the wire mesh. The conductive layer is made of metal, conductive glass, conductive plastic or conductive ceramic.
In one embodiment, as shown in fig. 3, the wire-net 12 in the electrode plate 1 is two layers.
In this embodiment, the two-layer wire mesh has a greater binding force with the electrode active material than a single-layer structure.
In addition, the structural strength of the two layers of metal wire meshes is higher, so that the structural strength of the electrode plate is higher, and the stability is stronger.
Of course, the wire mesh can be one layer or other layers, and those skilled in the art can set the number of the wire mesh layers according to actual needs.
In the embodiment of the disclosure, the SMT preparation method is applied to the patch battery, so that the preparation process of the patch battery is greatly simplified.
In addition, the pole piece has high structural strength.
In one embodiment, the electrode active material 11 is a material including lithium ions, the electrode plate 1 is provided at least one surface thereof in the thickness direction with a separator material layer 2, and the separator material layer 2 is a porous layer selectively passing lithium ions. The layer of separator material serves to insulate the positive and negative plates and to allow the passage of conductive ions. In this example, the layer of separator material is bonded to the electrode plate. When the patch battery is formed, an isolating layer is not required to be additionally arranged between the positive plate and the negative plate. This arrangement makes it easy to assemble the cells of the patch battery.
In addition, the accuracy of cell assembly is higher.
In one embodiment, the insulating-material layer 4 and the isolating-material layer 2 are both ceramic insulating materials. The insulating-material layer 4 and the isolating-material layer 2 are integrally sinter-molded.
In this embodiment, the ceramic insulating material is capable of achieving an insulating effect in the first via hole and an insulating effect of the spacer material layer.
During preparation, firstly, coating a raw material of a ceramic insulating material on the hole wall of the first through hole and the surface of the electrode plate; then, the material is formed by sintering.
During sintering, microscopic particles in the material are fused with the interparticle contact portions. To form a porous structure. The integrated into one piece can avoid when shaping separately, insulating material layer 4 and the insulating material layer 2 between the two problem that the dielectric strength of contact site is poor, has ensured the reliability of insulating properties, has promoted the durability of pole piece.
Furthermore, the integral molding simplifies the steps of arranging the insulating-material layer 4 and the insulating-material layer 2.
For example, the insulating material layer and the isolation material layer formed of the ceramic insulating material have a thickness of 5um to 15 um. The sintering process adopts Gas Pressure Sintering (GPS). Gas pressure sintering refers to a sintering mode in which a predetermined gas pressure is applied during sintering. For example, N is generally used2The pressure is 1-10 MPa, and the temperature is 600-650 ℃. The sintering condition can inhibit the decomposition and weight loss of the ceramic material at high temperature, thereby shortening the sintering time of the ceramic insulating material, further promoting the densification of the ceramic insulating material and obtaining a high-density insulating material layer and an isolating material layer.
In one embodiment, the ceramic insulating material comprises Al2O3、MgO、BeO、CaO、Si3N4And ZrO.
In this embodiment, the material selected may be a mixture of one or more of the above materials. The formed ceramic insulating material has good insulating capability, and can form a porous structure which selectively passes lithium ions after sintering and forming.
In one embodiment, the electrode active material is LiCoO2、LiFePO4、LiMn2O4At least one of (1).
In this embodiment, the electrode active material is a material containing lithium ions, so that the electrode plate can be used in a patch battery as a positive electrode plate of the patch battery.
In one embodiment, the electrode active material is at least one of graphite and silicon.
In this embodiment, a pole piece made of graphite, silicon or a mixture of the two is used as the negative pole piece of the patch battery. The energy density of the surface mounted battery can be improved by adding the silicon material, so that the capacity and the electric quantity of the surface mounted battery can be improved on the premise of not changing the volume of the original surface mounted battery.
In another embodiment of the present disclosure, there is provided a pole piece of an SMT patch battery, including an electrode plate 1, the electrode plate 1 including a wire mesh 12 and an electrode active material 11 attached on the wire mesh 12, the electrode active material 11 being press-formed and cured on the wire mesh. A first through hole 6 and a second through hole 7 are arranged on the electrode plate 1; the inner wall of the first via 6 is provided with an insulating material layer 4 and the inner wall of the second via 7 is provided with a conductor layer 5.
In this embodiment, the basic structure of the electrode plate is a wire mesh and an electrode active material are press-molded. Wherein the wire mesh stabilizes the frame structure of the electrode plate, and the electrode active material provides the electrode plate with chemical properties. After curing, the electrode active material and the wire mesh are fixed in shape and structure, and the strength is also enhanced. The first through hole and the second through hole are close to two end parts of the rectangular unit chip along the length direction and are in the middle position of the width direction. An insulating material layer is arranged in the first through hole, plays an insulating role, and is made of plastic, glass, ceramic, rubber and the like. And arranging a conductor layer on the inner wall of the second through hole, wherein the conductor layer is conducted with the electrode active material and/or the wire mesh when the second through hole is electrified. The conductive layer is made of metal, conductive glass, conductive plastic or conductive ceramic.
The main component of the first binder is PVDF, namely linear crystalline vinylidene fluoride polymer, and the viscosity of the first binder is 3-5 Pascal.s (1 Pa.s). The PVDF is dissolved in a solvent to form a first binder. For example, the solvent is acetone, NMP, or the like.
The material of the metal wire mesh is gold, copper, silver, aluminum, titanium, magnesium or alloy of the above metals. The metal wire mesh is a three-dimensional mesh structure formed by weaving. For example, the wire mesh has a pore diameter of 120 to 150mm and a porosity of 100 to 120 mesh. Within the above range, the structural strength of the wire-net 12 is high, and more electrode active material can be attached.
In addition, the wire-net 12 can function as a conductor.
For example, the thickness of the electrode plate is 0.05mm to 0.5mm, and the electrode plate has a sheet structure. The overall shape of the electrode plate may be, but is not limited to, rectangular, circular, triangular, diamond, oval, etc. Here, one electrode plate of one type of patch battery may be formed; alternatively, a single plate may be formed and then cut into a unit cell having a predetermined shape according to the size of the different types of the chip batteries.
The first binder can be added into the electrode active material before the metal wire mesh and the electrode active material are pressed, so that the structural stability of the pressed electrode plate and the binding force between the electrode active material and the metal wire mesh are improved.
In one embodiment, the wire mesh 12 in the electrode plate 1 is two layers.
In this embodiment, the two-layer wire mesh has a greater binding force with the electrode active material than a single-layer structure.
In addition, the structural strength of the two layers of metal wire meshes is higher, so that the structural strength of the electrode plate is higher, and the stability is stronger.
Of course, the wire mesh can be one layer or other layers, and those skilled in the art can set the number of the wire mesh layers according to actual needs.
In the embodiment of the disclosure, the SMT preparation method is applied to the patch battery, so that the preparation process of the patch battery is greatly simplified.
In addition, the pole piece has high structural strength.
In one embodiment, the electrode active material 11 is a material including lithium ions, at least one surface of the electrode plate 1 in the thickness direction is provided with a separator material layer 2, and the separator material layer 2 is a porous layer selectively passing lithium ions. The layer of separator material serves to insulate the positive and negative plates and to allow the passage of conductive ions. In this example, the layer of separator material is bonded to the electrode plate. When the patch battery is formed, an isolating layer is not required to be additionally arranged between the positive plate and the negative plate. This arrangement makes it easy to assemble the cells of the patch battery.
In addition, the accuracy of cell assembly is higher.
In one embodiment, the insulating material layer 4 and the isolating material layer 2 are both ceramic insulating materials, and the insulating material layer 4 and the isolating material layer 2 are integrally formed by sintering.
In this embodiment, the ceramic insulating material is capable of achieving an insulating effect in the first via hole and an insulating effect of the spacer material layer.
During preparation, firstly, coating a raw material of a ceramic insulating material on the hole wall of the first through hole and the surface of the electrode plate; then, the material is formed by sintering.
During sintering, microscopic particles in the material are fused with the interparticle contact portions. To form a porous structure. The integrated into one piece can avoid when shaping separately, insulating material layer 4 and the insulating material layer 2 between the two problem that the dielectric strength of contact site is poor, has ensured the reliability of insulating properties, has promoted the durability of pole piece.
Furthermore, the integral molding simplifies the steps of arranging the insulating-material layer 4 and the insulating-material layer 2.
For example, the insulating material layer and the isolation material layer formed of the ceramic insulating material have a thickness of 5um to 15 um. The sintering process adopts Gas Pressure Sintering (GPS), which is a sintering method that applies a predetermined gas pressure during the sintering process, and generally adopts N2The pressure range is 1-10 MPa, the temperature is 600-650 ℃, and the sintering condition can inhibit the decomposition and weight loss of the ceramic material at high temperature, so that the sintering time of the ceramic insulating material is shortened, the densification of the ceramic insulating material is further promoted, and a high-density insulating material layer and an isolation material layer are obtained.
In one embodiment, the ceramic insulating material comprises Al2O3、MgO、BeO、CaO、Si3N4And in ZrOOne of them is less.
In this embodiment, the ceramic insulating material comprises a mixture of one or more of the above materials. The formed insulating material has better insulating property.
In one embodiment, the electrode active material is LiCoO2、LiFePO4、LiMn2O4At least one of (1).
In this embodiment, the electrode active material is a material containing lithium ions, so that the battery plate 1 can be used in a patch battery. The positive plate is used as a patch battery.
In one embodiment, the electrode active material is at least one of graphite and silicon.
In this embodiment, a pole piece made of graphite, silicon or a mixture of the two is used as the negative pole piece of the patch battery. The energy density of the surface mounted battery can be improved by adding the silicon material, so that the capacity and the electric quantity of the surface mounted battery can be improved on the premise of not changing the volume of the original surface mounted battery.
According to another embodiment of the present disclosure, as shown in fig. 1, there is provided a method for manufacturing an SMT patch battery, including:
the positive plate 1a is manufactured by adopting the manufacturing method of the pole piece of the SMT paster battery, wherein the electrode active material is a positive active material containing lithium ions; the negative plate 1b is manufactured by adopting the manufacturing method of the pole piece of the SMT paster battery, wherein the electrode active material is a negative active material, and the positive active material and the negative active material are as described above;
forming a separator material layer 2 on a surface of at least one of the positive electrode sheet 1a and the negative electrode sheet 1b in a thickness direction, wherein the separator material layer 2 is a porous layer that selectively passes lithium ions;
coating an electrolyte on the surfaces of the positive electrode tab 1a and the negative electrode tab 1b, and/or soaking the positive electrode tab 1a and the negative electrode tab 1b in the electrolyte, through which lithium ions migrate between the positive electrode tab 1a and the negative electrode tab 1 b;
alternately arranging the positive plates 1a and the negative plates 1b to form a laminated structure, wherein the isolating material layer 2 is positioned between the adjacent positive plates 1a and the adjacent negative plates 1b, the parts, corresponding to the first through holes 6 and the second through holes 7 of the positive plates, of the isolating material layer 2 are hollowed out, the first through holes 6 of the positive plates 1a are opposite to the second through holes 7 of the negative plates 1b to form a first channel, and the second through holes 7 of the positive plates 1a are opposite to the first through holes 6 of the negative plates 1b to form a second channel;
the laminated structure is pressed together, for example, a second binder is applied between the positive electrode sheet 1a and the negative electrode sheet 1 b. For example, the second binder is an inorganic binder. The second binder is silicate binder, phosphate binder, aluminate binder, etc. The above binder has a strong binding force and is capable of forming pores that allow lithium ions to pass through after curing. Curing the second adhesive by hot pressing so as to press the laminated structure together;
conductive materials 8 are respectively arranged in the first channel and the second channel, and the conductive materials 8 are connected with the conductor layers 5 in the corresponding channels. For example, the conductive material 8 in the first passage is connected to the conductor layer 5 in the second through hole 7 of the positive electrode tab 1 a. Since the insulating material layer 4 is provided inside the first through-hole 6 of the negative electrode tab 1b, the conductive material 8 is insulated from the negative electrode tab 1 b. The conductive material 8 serves as the positive electrode of the cell.
The conductive material 8 in the second channel is connected with the conductor layer 5 in the second through hole of the negative plate 1 b. Since the insulating material layer 4 is provided in the first through hole 6 of the positive electrode sheet 1a, the conductive material 8 is insulated from the positive electrode sheet 1 a. The conductive material 8 serves as the negative electrode of the cell.
In this embodiment, the positive plate and the negative plate manufactured by the method for manufacturing the electrode plate of the SMT patch battery have all the advantages of the manufacturing method. The separator material layer on at least one surface of the positive plate or the negative plate insulates the positive plate and the negative plate. Wherein, the isolating material layer selectively passes through lithium ions, and is suitable for the lithium ion battery.
For example, the cured pole pieces need to be cut into unit pieces according to the size of the fabricated patch battery. After dicing, the die needs to be ultrasonically washed to remove the diced dust, and then the die is dried.
After the isolating material layer is arranged, electrolyte is coated and/or soaked on the surface of the positive plate and/or the negative plate, so that lithium ions in the patch battery can be transferred between the plates.
After lamination, the positive pole piece and the negative pole piece need to be pressed, so that the pole pieces are tightly attached, the size of the formed laminated structure is reduced, and the occupied space is reduced.
Conductive materials are arranged in the first channel and the second channel so as to be communicated with the second through holes among the positive plates, so that the positive plates can be conducted; and the second through holes are communicated with the negative pole pieces to enable the negative pole pieces to be conducted.
In one embodiment, as shown in fig. 3, the wire-net 12 in the electrode plate 1 is two layers.
In this embodiment, the two-layer wire mesh has a greater binding force with the electrode active material than a single-layer structure.
In addition, the structural strength of the two layers of metal wire meshes is higher, so that the structural strength of the electrode plate is higher, and the stability is stronger.
Of course, the wire mesh can be one layer or other layers, and those skilled in the art can set the number of the wire mesh layers according to actual needs.
In one embodiment, the insulating-material layer 4 and the isolating-material layer 2 are both ceramic insulating materials. The insulating-material layer 4 and the isolating-material layer 2 are integrally sinter-molded.
In this embodiment, the ceramic insulating material is capable of achieving an insulating effect in the first via hole and an insulating effect of the spacer material layer.
During preparation, firstly, coating a raw material of a ceramic insulating material on the hole wall of the first through hole and the surface of the electrode plate; then, the material is formed by sintering.
During sintering, microscopic particles in the material are fused with the interparticle contact portions. To form a porous structure. The integrated into one piece can avoid when shaping separately, insulating material layer 4 and the insulating material layer 2 between the two problem that the dielectric strength of contact site is poor, has ensured the reliability of insulating properties, has promoted the durability of pole piece.
Furthermore, the integral molding simplifies the steps of arranging the insulating-material layer 4 and the insulating-material layer 2.
For example, the insulating material layer and the isolation material layer formed of the ceramic insulating material have a thickness of 5um to 15 um. The sintering process adopts Gas Pressure Sintering (GPS). Gas pressure sintering refers to a sintering mode in which a predetermined gas pressure is applied during sintering. For example, N is generally used2The pressure is 1-10 MPa, and the temperature is 600-650 ℃. The sintering condition can inhibit the decomposition and weight loss of the ceramic material at high temperature, thereby shortening the sintering time of the ceramic insulating material, further promoting the densification of the ceramic insulating material and obtaining a high-density insulating material layer and an isolating material layer.
In one embodiment, the ceramic insulating material comprises Al2O3、MgO、BeO、CaO、Si3N4And ZrO.
In this embodiment, the material selected may be a mixture of one or more of the above materials. The formed ceramic insulating material has good insulating capability, and can form a porous structure which selectively passes lithium ions after sintering and forming.
In one embodiment, the electrode active material is LiCoO2、LiFePO4、LiMn2O4At least one of (1).
In this embodiment, the electrode active material is a material containing lithium ions, so that the electrode plate can be used in a patch battery as a positive electrode plate of the patch battery.
In one embodiment, the electrode active material is at least one of graphite and silicon.
In this embodiment, a pole piece made of graphite, silicon or a mixture of the two is used as the negative pole piece of the patch battery. The energy density of the surface mounted battery can be improved by adding the silicon material, so that the capacity and the electric quantity of the surface mounted battery can be improved on the premise of not changing the volume of the original surface mounted battery.
In one embodiment, the electrolyte comprises polyethylene oxide.
In this embodiment, lithium ions migrate between the positive and negative electrode sheets through the electrolyte. Polyethylene oxide has good lithium ion conducting properties. And the lithium ions are enabled to migrate in the patch battery along the electric field under the action of the electric field.
In one embodiment, the electrolyte includes a sulfide.
In this example, the sulfide has good lithium ion conducting properties. And the lithium ions are enabled to migrate in the patch battery along the electric field under the action of the electric field.
In one embodiment, the sulfides include thio-LiSiCON, LiGPS, LiSnPS, LiSiPS, Li2S-P2S5、Li2S-SiS2And Li2S-B2S3At least one of (1).
In this example, lithium ions are all able to migrate in the above-mentioned sulfide.
In one embodiment, the laminated structure is pressed together by means of a hot press.
In this embodiment, first, the second binder is applied between the positive electrode tab and the negative electrode tab. And then, curing the second adhesive in a hot pressing mode, and laminating the laminated structure.
For example, the hot pressing temperature is 150 to 200 ℃ and the pressure is 2 to 3 MPa. Under this condition, the second binder does not crack. After curing, the second binder is firmly bonded with the positive plate and the negative plate.
In one embodiment, the step of disposing the conductive material 8 in the first channel and the second channel, respectively, comprises:
injecting metal slurry into the first channel and the second channel;
the metal slurry is solidified by high temperature reflow.
In this embodiment, the metal slurry has fluidity and can be injected into the first passage and the second passage. However, since the metal paste has a high viscosity and a poor fluidity, the contact area between the metal paste and the conductor layer in the first channel and the second channel is small, which is not favorable for conduction with the conductor layer.
High temperature reflow is a means of melting the metal in the metal slurry into a liquid state by means of high temperature. After the metal is converted into the liquid state, the metal has good fluidity and can be closely and comprehensively contacted with the conductor layer. The high-temperature backflow can enable the metal slurry and the metal conductor in the second through hole 7 to be welded together, and therefore the conductivity is optimized.
In one embodiment, the metal paste is a tin paste or a silver paste.
In this example, both the tin and silver pastes had good conductivity.
In addition, the melting points of the two materials are low, which makes the operation of high-temperature reflow easier.
In one embodiment, as shown in fig. 4, after the step of disposing the conductive material 8 in the first channel and the second channel, respectively, the method further includes:
placing the laminated structure into a mold;
an insulating protective layer 10 is injection molded over the laminated structure.
In this embodiment, the stacked structure with the conductive material is the battery core of the battery, and the battery core is covered with a layer of insulating material to insulate and separate the battery core from the outside, i.e. the chip battery is manufactured, generally, the base 9 is welded at the bottom of the battery core, and then the welded battery core and the base are covered in the insulating protective layer together. For example, the two conductive materials 8 of the battery cell are respectively welded with the corresponding pins 81 on the base 9, so as to realize electrical connection. The electric connection between the battery cell and the pin 81 on the base 9 also requires the connection of a PTC protection unit 91 between the battery cell and the base to protect the safety of the surface-mounted battery during the charging and discharging process. The cell and base 9 are then placed together in a mold. For example, an insulating protective layer is formed outside the battery cell by injection molding, glue dropping and the like.
For example, the insulating protective layer is made of rubber, plastic or the like. Preferably, the insulating protection layer material is epoxy resin. The epoxy resin has good insulation and plasticity.
After the surface-mounted battery is manufactured, the surface-mounted battery is subjected to formation and capacity grading in the formation cabinet and the capacity grading cabinet respectively so as to charge the surface-mounted battery.
And finally, testing the internal resistance and the voltage of the surface mount battery to determine the performance of the battery.
According to another embodiment of the present disclosure, there is provided an SMT patch battery including a cell including the electrode active material LiCoO2、LiFePO4、LiMn2O4A pole piece of at least one of them, a pole piece of which the electrode active material is graphite, and an isolating material layer 2 arranged between the two pole pieces;
defining electrode active material as LiCoO2、LiFePO4、LiMn2O4The pole piece of at least one of the positive pole pieces 1a, the pole piece with the electrode active material of graphite is the negative pole piece 1b, the positive pole pieces 1a and the negative pole pieces 1b are alternately arranged, the parts, corresponding to the first through hole 6 and the second through hole 7 of the positive pole piece 1a, of the isolating material layer 2 are hollowed out, the first through hole 6 of the positive pole piece 1a is opposite to the second through hole 7 of the negative pole piece 1b to form a first channel, and the second through hole 7 of the positive pole piece 1a is opposite to the first through hole 6 of the negative pole piece 1b to form a second channel; an electrically conductive material 8 is provided in the first and second channels, respectively.
In this embodiment, both the positive electrode tab and the negative electrode tab have advantages brought by the manufacturing method thereof.
Conductive materials 8 are respectively arranged in the first channel and the second channel, and the conductive materials 8 are connected with the conductor layers 5 in the corresponding channels. For example, the conductive material 8 in the first passage is connected to the conductor layer 5 in the second through hole 7 of the positive electrode tab 1 a. Since the insulating material layer 4 is provided inside the first through-hole 6 of the negative electrode tab 1b, the conductive material 8 is insulated from the negative electrode tab 1 b. The conductive material 8 serves as the positive electrode of the cell.
The conductive material 8 in the second channel is connected with the conductor layer 5 in the second through hole of the negative plate 1 b. Since the insulating material layer 4 is provided in the first through hole 6 of the positive electrode sheet 1a, the conductive material 8 is insulated from the positive electrode sheet 1 a. The conductive material 8 serves as the negative electrode of the cell.
For example, the electrode sheet needs to be cut into unit pieces according to the size of the fabricated patch battery, after the cutting, the unit pieces need to be subjected to ultrasonic water washing to remove dust generated by the cutting, and then the unit pieces need to be dried.
The hollowed-out part is arranged on the isolating material layer, so that the first through hole and the second through hole in the same channel can be communicated through the conductive material, and the conductive material can be smoothly electrically connected with the homopolar pole piece.
In one embodiment, the wire mesh 12 in the electrode plate 1 is two layers.
In this embodiment, the two-layer wire mesh has a greater binding force with the electrode active material than a single-layer structure.
In addition, the structural strength of the two layers of metal wire meshes is higher, so that the structural strength of the electrode plate is higher, and the stability is stronger.
Of course, the wire mesh can be one layer or other layers, and those skilled in the art can set the number of the wire mesh layers according to actual needs.
In one embodiment, the insulating material layer 4 and the isolating material layer 2 are both ceramic insulating materials, and the insulating material layer 4 and the isolating material layer 2 are integrally formed by sintering.
In this embodiment, the ceramic insulating material is capable of achieving an insulating effect in the first via hole and an insulating effect of the spacer material layer.
During preparation, firstly, coating a raw material of a ceramic insulating material on the hole wall of the first through hole and the surface of the electrode plate; then, the material is formed by sintering.
During sintering, microscopic particles in the material are fused with the interparticle contact portions. To form a porous structure. The integrated into one piece can avoid when shaping separately, insulating material layer 4 and the insulating material layer 2 between the two problem that the dielectric strength of contact site is poor, has ensured the reliability of insulating properties, has promoted the durability of pole piece.
Furthermore, the integral molding simplifies the steps of arranging the insulating-material layer 4 and the insulating-material layer 2.
For example, the insulating material layer and the isolation material layer formed of the ceramic insulating material have a thickness of 5um to 15 um. The sintering process uses Gas Pressure Sintering (GPS), which means that a predetermined gas pressure is applied during the sintering process, for example, N is generally used2Pressure range ofThe sintering condition can inhibit the decomposition and weight loss of the ceramic material at high temperature under the conditions of 1-10 MPa and 600-650 ℃, so that the sintering time of the ceramic insulating material is shortened, the densification of the ceramic insulating material is further promoted, and a high-density insulating material layer and an isolation material layer are obtained.
In one embodiment, the ceramic insulating material comprises Al2O3、MgO、BeO、CaO、Si3N4And ZrO.
In this embodiment, the material selected may be a mixture of one or more of the above materials. The formed ceramic insulating material has good insulating capability, and can form a porous structure which selectively passes lithium ions after sintering and forming.
In one embodiment, the battery further comprises an electrolyte combined with the battery cell, wherein the electrolyte comprises polyethylene oxide.
In this example, lithium ions migrate between the positive and negative electrode sheets through the electrolyte, and polyethylene oxide has good lithium ion conducting properties. And the lithium ions are enabled to migrate in the patch battery along the electric field under the action of the electric field.
In one embodiment, the battery further comprises an electrolyte integrated with the battery cell, wherein the electrolyte comprises sulfide.
In this example, the sulfide has good lithium ion conducting properties. And the lithium ions are enabled to migrate in the patch battery along the electric field under the action of the electric field.
In one embodiment, the sulfides include thio-LiSiCON, LiGPS, LiSnPS, LiSiPS, Li2S-P2S5、Li2S-SiS2And Li2S-B2S3At least one of (1).
In this example, lithium ions are all able to migrate in the above-mentioned sulfide.
In one embodiment, the laminated structure is pressed together by means of heat pressing.
In this embodiment, first, the second binder is applied between the positive electrode tab and the negative electrode tab. And then, curing the second adhesive in a hot pressing mode, and laminating the laminated structure.
For example, the hot pressing temperature is 150 to 200 ℃ and the pressure is 2 to 3 MPa. Under this condition, the second binder does not crack. After curing, the second binder is firmly bonded with the positive plate and the negative plate.
In one embodiment, the conductive material 8 is formed by high temperature reflow curing of a metal paste.
In this embodiment, the metal slurry has fluidity and can be injected into the first passage and the second passage. However, since the metal paste has a high viscosity and a poor fluidity, the contact area between the metal paste and the conductor layer in the first channel and the second channel is small, which is not favorable for conduction with the conductor layer.
High temperature reflow is a means of melting the metal in the metal slurry into a liquid state by means of high temperature. After the transition to the liquid state, the metal has good fluidity and can be fused with the conductor layer in the second via hole 7. In one embodiment, the metal paste is a tin paste or a silver paste.
In this example, both the tin and silver pastes had good conductivity.
In addition, the melting points of the two materials are low, which makes the operation of high-temperature reflow easier.
In one embodiment, as shown in fig. 4, an insulating protection layer 10 is formed outside the battery cell by injection molding.
In this embodiment, a layer of insulating material is coated on the battery core to insulate and separate the battery core from the outside, and thus the battery is manufactured, generally, the base 9 is welded to the bottom of the battery core, and then the battery core is coated in the insulating material. For example, the two conductive materials 8 of the battery cell are respectively welded with the corresponding pins 81 on the base 9, so as to realize electrical connection. And the conductive material 8 of the battery cell and the pin 81 of the base are also required to be electrically connected through the PTC protection unit 91 so as to protect the safety of the charging and discharging process of the patch battery. The cell and base 9 are then placed together in a mold. For example, the insulating protective layer 10 is formed outside the battery cell by injection molding, glue dropping, or the like.
For example, the insulating protective layer is made of rubber, plastic or the like. Preferably, the insulating protection layer material is epoxy resin. The epoxy resin has good insulation and plasticity.
After the surface mounted battery is manufactured, the surface mounted battery is formed and subjected to capacity grading in the forming cabinet and the capacity grading cabinet respectively so as to enable the surface mounted battery to be electrified.
And finally, testing the internal resistance and the voltage of the surface mount battery to determine the performance of the battery.
Compared with the prior art, the manufacturing process of the patch battery and the pole piece in the embodiment is very simple, and the performance of the pole piece in the manufactured patch battery and the manufactured patch battery is greatly improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (34)

1. A manufacturing method of a pole piece of an SMT patch battery is characterized by comprising the following steps:
uniformly mixing an electrode active material and a first binder to form slurry, attaching the slurry on a wire mesh, and pressing to form an electrode plate;
curing the electrode active material;
forming a first through hole in the solidified electrode plate, and arranging an insulating material layer on the inner wall of the first through hole;
and forming a second through hole on the electrode plate, and arranging a conductor layer on the inner wall of the second through hole.
2. An SMT patch battery pole piece manufacturing method according to claim 1, wherein the electrode active material is a material including lithium ions, and a separator material layer is provided on at least one surface of the electrode plate in a thickness direction, the separator material layer being a porous layer that selectively passes through lithium ions.
3. An SMT patch battery pole piece manufacturing method according to claim 2, wherein the insulating material layer and the isolation material layer are both ceramic insulating materials and are integrally sintered.
4. A method for making a pole piece for an SMT patch battery according to claim 3 wherein the ceramic insulating material comprises Al2O3、MgO、BeO、CaO、Si3N4And ZrO.
5. A method for making a pole piece of an SMT patch battery according to claim 1, wherein the electrode active material is LiCoO2、LiFePO4、LiMn2O4At least one of (1).
6. An SMT patch battery pole piece manufacturing method according to claim 1, wherein the electrode active material is at least one of graphite and silicon.
7. The pole piece of the SMT patch battery is characterized by comprising an electrode plate, wherein the electrode plate comprises a metal wire mesh and an electrode active material attached to the metal wire mesh, the electrode active material is pressed, molded and solidified on the metal wire mesh, and a first through hole and a second through hole are formed in the electrode plate; the inner wall of the first through hole is provided with an insulating material layer, and the inner wall of the second through hole is provided with a conductor layer.
8. The pole piece according to claim 7, wherein the electrode active material is a material including lithium ions, and a separator material layer is provided on at least one surface of the electrode plate in a thickness direction, the separator material layer being a porous layer selectively passing lithium ions.
9. The pole piece of claim 8, wherein the insulating material layer and the isolating material layer are both ceramic insulating materials, and the insulating material layer and the isolating material layer are integrally formed by sintering.
10. The pole piece of claim 9, wherein the ceramic insulating material comprises Al2O3、MgO、BeO、CaO、Si3N4And ZrO.
11. The pole piece of claim 7, wherein the electrode active material is LiCoO2、LiFePO4、LiMn2O4At least one of (1).
12. The pole piece of claim 7, wherein the electrode active material is at least one of graphite and silicon.
13. A manufacturing method of an SMT patch battery is characterized by comprising the following steps:
the positive electrode sheet manufactured by the manufacturing method according to claim 1, wherein the electrode active material is a positive electrode active material including lithium ions; the negative electrode sheet manufactured by the manufacturing method according to claim 1, wherein the electrode active material is a negative electrode active material;
forming a separator layer on a surface of at least one of the positive electrode tab and the negative electrode tab in a thickness direction, wherein the separator layer is a porous layer that selectively passes lithium ions;
coating electrolyte on the surfaces of the positive plate and the negative plate, and/or soaking the positive plate and the negative plate in the electrolyte;
alternately arranging the positive plates and the negative plates to form a laminated structure, wherein the isolating material layer is positioned between the adjacent positive plates and the adjacent negative plates, the parts of the isolating material layer corresponding to the first through holes and the second through holes of the positive plates are hollowed out, the first through holes of the positive plates are opposite to the second through holes of the negative plates to form a first channel, and the second through holes of the positive plates are opposite to the first through holes of the negative plates to form a second channel;
pressing the laminated structure together;
and respectively arranging conductive materials in the first channel and the second channel, wherein the conductive materials are connected with the conductor layers in the corresponding channels.
14. An SMT patch battery according to claim 13 wherein the insulating material layer and the isolating material layer are both ceramic insulating materials and are integrally formed by sintering.
15. An SMT patch battery according to claim 14, wherein the ceramic insulating material comprises Al2O3、MgO、BeO、CaO、Si3N4And ZrO.
16. An SMT patch battery according to claim 13, wherein the positive active material is LiCoO2、LiFePO4、LiMn2O4At least one of (1).
17. An SMT patch battery according to claim 13 wherein the negative active material is at least one of graphite and silicon.
18. An SMT patch battery according to claim 13 wherein the electrolyte comprises polyethylene oxide.
19. An SMT patch battery according to claim 13, wherein the electrolyte comprises a sulfide.
20. An SMT patch battery according to claim 19, wherein the sulfide comprises thio-LiSiCON, LiGPS, LiSnPS, LiSiPS, Li2S-P2S5、Li2S-SiS2And Li2S-B2S3At least one of (1).
21. An SMT patch battery according to claim 13, wherein the stacked structures are laminated together by hot pressing.
22. An SMT patch battery according to claim 13 wherein the step of disposing a conductive material within each of the first and second channels comprises:
injecting a metal slurry into the first channel and the second channel;
the metal slurry is solidified by high temperature reflow.
23. An SMT patch battery according to claim 22, wherein the metal paste is a tin paste or a silver paste.
24. An SMT patch battery according to claim 13 wherein after the step of disposing a conductive material within each of the first and second channels, further comprising:
placing the laminated structure into a mold;
and injecting an insulating protective layer outside the laminated structure.
25. An SMT patch battery, comprising a cell comprising a pole piece according to claim 11, a pole piece according to claim 12, and a layer of separator material disposed between the two pole pieces;
the pole piece according to claim 11 being a positive pole piece, the pole piece according to claim 12 being a negative pole piece, the positive pole piece and the negative pole piece being alternately arranged to form a laminated structure, portions of the separator material layer corresponding to a first through hole and a second through hole of the positive pole piece being hollowed out, the first through hole of the positive pole piece opposing the second through hole of the negative pole piece to form a first channel, the second through hole of the positive pole piece opposing the first through hole of the negative pole piece to form a second channel; and conductive materials are respectively arranged in the first channel and the second channel and are connected with the conductor layers in the corresponding channels.
26. An SMT patch battery according to claim 25, wherein the insulating material layer and the isolating material layer are both ceramic insulating materials, the insulating material layer and the isolating material layer being integrally sinter molded.
27. An SMT patch battery according to claim 26, wherein the ceramic insulating material comprises Al2O3、MgO、BeO、CaO、Si3N4And ZrO.
28. An SMT patch battery as defined in claim 25, further comprising an electrolyte integrated with said cells, said electrolyte comprising polyethylene oxide.
29. An SMT patch battery as defined in claim 25, further comprising an electrolyte integrated with said cells, said electrolyte comprising a sulphide.
30. An SMT patch battery according to claim 29, wherein the sulfide comprises thio-LiSiCON, LiGPS, LiSnPS, LiSiPS, Li2S-P2S5、Li2S-SiS2And Li2S-B2S3At least one of (1).
31. An SMT patch battery according to claim 25, wherein the stacked structures are pressed together by way of a heat press.
32. An SMT patch battery according to claim 25, wherein the conductive material is formed from a metal paste cured by high temperature reflow.
33. An SMT patch battery according to claim 32, wherein the metal paste is a tin or silver paste.
34. An SMT patch battery according to claim 25, wherein an insulating protective layer is injection molded over the cells.
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