CN114171743A - Negative plate, battery cell structure and battery - Google Patents

Negative plate, battery cell structure and battery Download PDF

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Publication number
CN114171743A
CN114171743A CN202111488873.8A CN202111488873A CN114171743A CN 114171743 A CN114171743 A CN 114171743A CN 202111488873 A CN202111488873 A CN 202111488873A CN 114171743 A CN114171743 A CN 114171743A
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China
Prior art keywords
negative
negative electrode
smear
current collector
plate
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Pending
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CN202111488873.8A
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Chinese (zh)
Inventor
周乔
陈莎
彭宁
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Zhuhai Cosmx Battery Co Ltd
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Zhuhai Cosmx Battery Co Ltd
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Priority to CN202111488873.8A priority Critical patent/CN114171743A/en
Publication of CN114171743A publication Critical patent/CN114171743A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy coatings
    • H01M4/662—Alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound 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
    • H01M4/13—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
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H01M4/366—Composites as layered products
    • 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
    • H01M2004/021—Physical characteristics, e.g. porosity, surface area
    • 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
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027—Negative electrodes
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Composite Materials (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Abstract

The invention provides a negative plate, a battery cell structure and a battery, wherein the negative plate comprises: the coating comprises a negative current collector, a first negative smear and a second negative smear, wherein the first negative smear is coated on the first surface of the negative current collector, the second negative smear is coated on the second surface of the negative current collector, and the first surface and the second surface of the negative current collector are opposite; and the negative current collector is made of a lithium copper alloy material. According to the embodiment of the invention, the material of the negative current collector is replaced by the lithium copper alloy from the copper foil, and the lithium copper alloy is used as a lithium source in the first discharging process to supplement lithium consumed by reactions such as a solid electrolyte membrane formed on the surface of the electrode in the first charging process, so that the first efficiency of the battery is effectively improved, and the capacity of the battery is improved.

Description

Negative plate, battery cell structure and battery
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a negative plate, a battery core structure and a battery.
Background
The high energy density and power density of lithium batteries have made them useful in portable electronic products and electric vehicles. In order to obtain a lithium battery with higher energy density, the active material of the negative electrode sheet is currently replaced with a silicon negative electrode material. However, in this technique, since the negative active material is replaced with a silicon negative material, the first effect of the silicon negative material is extremely low, only 69%, relative to the first effect of the graphite material of 90% or more, resulting in a low capacity of the lithium battery.
It can be seen that the related art has a problem that the capacity of the lithium battery is low.
Disclosure of Invention
The embodiment of the invention provides a negative plate, a cell structure and a battery, which aim to solve the problem of low capacity of the battery in the prior art.
In order to achieve the above object, an embodiment of the present invention provides a negative electrode sheet, including: a negative current collector, a first negative smear and a second negative smear, wherein,
the first negative electrode smear is coated on the first surface of the negative electrode current collector, the second negative electrode smear is coated on the second surface of the negative electrode current collector, and the first surface and the second surface of the negative electrode current collector are opposite;
and the negative current collector is made of a lithium copper alloy material.
As an optional embodiment, the lithium content in the negative electrode current collector is 5% to 80%, and the distance between the first surface and the second surface of the negative electrode current collector is 4 to 12 um.
As an alternative embodiment, the lithium copper alloy material includes a copper material and a lithium material, the copper material is a mesh-shaped porous skeleton structure provided with a plurality of voids, and the lithium material fills the voids.
As an alternative embodiment, the first negative electrode smear and the second negative electrode smear respectively include at least one of pure silicon, silicon oxygen, graphite, hard carbon, graphite doped silicon, and hard carbon doped silicon materials.
The invention also provides a battery cell structure, which comprises the negative plate, a positive plate and a diaphragm, wherein the diaphragm is arranged between the positive plate and the negative plate, and the positive plate, the diaphragm and the negative plate are wound along the starting end to form a winding core structure.
As an alternative embodiment, the first surface of the negative plate is provided with a first empty foil area and a first coating area, the first empty foil area is adjacent to the first coating area, and the first negative smear is coated on the first coating area;
and a second empty foil area, an intermediate area and a second coating area are arranged on the second surface of the negative plate, the intermediate area is positioned between the second empty foil area and the second coating area, and the second negative smear is coated on the second coating area.
As an alternative embodiment, the positive plate is coated with a positive active material, and a projection of a starting end of the positive active material of the positive plate in the thickness direction of the winding core structure corresponds to a starting end of the first negative smear.
As an alternative embodiment, a projection of the starting end of the positive electrode active material of the positive electrode sheet in the thickness direction of the jellyroll structure corresponds to the starting end of the second negative electrode smear.
As an optional implementation manner, the lithium ion battery further comprises a positive electrode tab and a negative electrode tab, wherein the positive electrode tab is fixed on the surface of the positive electrode plate, and the negative electrode tab is fixed on the surface of the first empty foil area, the second empty foil area or the intermediate area of the negative electrode plate.
The embodiment of the invention also provides a battery, which comprises the battery cell structure.
One of the above technical solutions has the following advantages or beneficial effects:
according to the embodiment of the invention, the material of the negative current collector is replaced by the lithium copper alloy from the copper foil, the negative plate forms the solid electrolyte membrane in the first charging process, and the lithium copper alloy releases lithium consumed as a lithium source for supplementing, so that the first efficiency of the battery can be effectively improved, and the capacity of the battery can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic plan view of a negative electrode sheet according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a negative electrode sheet according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic plan view of a negative electrode sheet according to an embodiment of the present invention, and as shown in fig. 1, the negative electrode sheet according to the embodiment of the present invention includes: a negative electrode current collector 10, a first negative electrode smear 11, and a second negative electrode smear 12, wherein,
the first negative smear 11 is coated on the first surface of the negative current collector 10, the second negative smear 12 is coated on the second surface of the negative current collector 10, and the first surface and the second surface of the negative current collector 10 are opposite;
the negative current collector 10 is a lithium copper alloy material.
In this embodiment, lithium ions form a solid electrolyte film on the surface of the battery electrode during the first charge and discharge, so that the reversible lithium ion content is reduced, resulting in a low battery capacity. In the embodiment of the invention, the material of the negative current collector 10 is lithium copper alloy, and lithium ions consumed by a solid electrolyte membrane can be supplemented in the charging process of the battery, so that the first efficiency of the battery is improved, and the capacity of the battery is improved.
Specifically, during the first charge of the battery, lithium ions in the electrolyte form a solid electrolyte membrane at the negative electrode of the battery. While the solid electrolyte membrane is formed, the lithium material in the lithium copper alloy serves as a lithium source to supplement lithium ions in the electrolyte, so that the lithium ions in the electrolyte are maintained at a high level. After the first charging is finished, the lithium ion content in the electrolyte before charging and the lithium ion content in the electrolyte after charging are kept within a lower difference, and the purpose of improving the first efficiency of the battery is achieved.
As an alternative embodiment, the lithium content in the negative electrode current collector 10 is 5% to 80%, and the distance between the first surface and the second surface of the negative electrode current collector 10 is 4 to 12 um.
In this embodiment, for different negative electrode materials, due to the difference of first effect, the supplement amount of lithium ions also needs to be adapted accordingly, and the lithium content in the lithium copper alloy material in the negative electrode current collector 10 is usually 5% -80%.
In addition, setting the distance between the first surface and the second surface of the negative electrode current collector 10 to 4-12um can make the negative electrode current collector 10 have higher conductivity and stability.
In addition, in the embodiment of the invention, the outermost layer of the roll core structure is wrapped by the aluminum foil in the battery positive plate, so the first surface of the negative current collector 10 completely covers the first negative smear 11, and the second surface of the negative current collector 10 has a single-plate area, so only the first area of the second surface of the negative current collector 10 completely covers the second negative smear 12, thereby improving the energy density and reducing the waste of raw materials.
As an alternative embodiment, the lithium copper alloy material includes a copper material and a lithium material, the copper material is a mesh-shaped porous skeleton structure provided with a plurality of voids, and the lithium material fills the voids.
In this embodiment, after the negative electrode current collector 10 releases lithium ions, a network porous skeleton structure, which is a copper skeleton, remains, and the battery maintains a stable structural form. Meanwhile, the copper framework can keep the conductivity and the thermal stability of copper, so that the battery can ensure the electrical cycle performance.
The lithium material is filled in the gaps of the reticular porous skeleton structure, and can be used as a lithium source to continuously supplement lithium ions under the condition that the content of the lithium ions in the electrolyte is reduced, so that the cycle performance of the battery is kept at a higher level. Meanwhile, the remaining net-shaped porous skeleton structure is kept continuous after the lithium material is consumed, so that the battery failure caused by the fracture of the negative electrode current collector 10 after the lithium material is consumed is avoided. In addition, the copper material has better conductivity, and the through skeleton of the reticular porous material structure can also realize the conductivity effect and keep the normal electric circulation of the battery.
As an alternative embodiment, the first negative electrode smear 11 and the second negative electrode smear 12 respectively include at least one of pure silicon, silicon oxide, graphite, hard carbon, graphite doped silicon, and hard carbon doped silicon materials.
In this embodiment, the materials of the first and second negative electrode smears 11 and 12 are pure silicon, silicon oxide, hard carbon, graphite-doped silicon, and hard carbon-doped silicon materials, which have superior energy density and capacity compared to the existing graphite materials.
In addition, in the embodiment of the present invention, the first negative electrode smear 11 and the second negative electrode smear 12 are pure silicon, silicon oxide, graphite, hard carbon, graphite doped silicon, and hard carbon doped silicon materials, and the doped silicon amount thereof ranges from 0% to 100% to adapt to the negative electrode current collectors 10 with different lithium contents.
As shown in fig. 2, the invention further provides a battery cell structure, which includes the negative electrode sheet, a positive electrode sheet 20 and a separator 30, wherein the separator 30 is disposed between the positive electrode sheet 20 and the negative electrode sheet, and the positive electrode sheet 20, the separator 30 and the negative electrode sheet are wound along the starting end to form a winding core structure.
In this embodiment, the winding core structure formed along the initial end of winding the positive electrode sheet 20, the separator 30, and the negative electrode sheet can effectively store the electrolyte, thereby improving the energy density and capacity of the battery.
The winding of the positive plate 20 and the negative plate can effectively increase the area of the positive plate 20 and the negative plate for electric circulation, and the increase of the area of the electric circulation can effectively improve the energy density of the battery.
In addition, the separator 30 is disposed between the positive electrode tab 20 and the negative electrode tab, preventing the occurrence of a problem of short-circuiting of the battery due to contact between the positive electrode tab 20 and the negative electrode tab.
As an alternative embodiment, the first surface of the negative plate is provided with a first empty foil area and a first coating area, the first empty foil area is adjacent to the first coating area, and the first negative smear 11 is coated on the first coating area;
and a second empty foil area, an intermediate area and a second coating area are arranged on the second surface of the negative plate, the intermediate area is positioned between the second empty foil area and the second coating area, and the second negative smear 12 is coated on the second coating area.
In this embodiment, because the innermost layer in the winding core structure is the negative electrode sheet, the negative electrode sheet located at the innermost layer in the winding process has an area corresponding to the negative electrode sheet, and the area does not have a corresponding positive electrode sheet, and thus, the electronic exchange can not be realized for electrical circulation, so that no coating is arranged in the area, and the waste of materials is avoided.
The first and second empty foil regions are adapted in projection in the thickness direction of the negative electrode current collector 10, and the regions may be more or less different according to different process designs, and may not exist in some designs. In the first and second empty foil regions, since the surface of the corresponding positive electrode sheet 20 is not provided with a positive electrode active material, the first and second empty foil regions are not coated with a coating layer, thereby avoiding material waste.
In addition, the projection of the intermediate region in the direction of the thickness of the negative electrode current collector 10 corresponds to the intermediate region, and as shown in fig. 2, there is no corresponding positive electrode sheet in the intermediate region, so the intermediate region is not coated with a coating. The middle area extends to the second negative electrode smear 12 from the second empty foil area and passes through the second bending part and the third bending part, wherein the middle area passes through the second bending part, so that two sides of the middle area at the second bending part can correspond to each other; after the middle area passes through the third bending part, the second coating 12 is arranged corresponding to the positive active material of the positive plate 20 in the winding core structure, so that the normal electric cycle of the battery is realized.
As an alternative embodiment, the positive electrode sheet 20 is coated with the positive electrode active material, and a projection of a starting end of the positive electrode active material of the positive electrode sheet 20 in the thickness direction of the jelly roll structure corresponds to a starting end of the first negative electrode smear 11.
In this embodiment, the positive active material of the positive electrode tab 20 of the battery needs to correspond to the position of the first negative electrode smear 11 of the negative electrode tab of the battery to perform the electrical cycle effectively. In the embodiment of the invention, the projection of the starting end of the positive active material on the first surface of the pole piece 20 in the thickness direction of the positive pole piece 20 corresponds to the starting end of the first negative smear, so that the corresponding adaptation of the position of the battery core at the starting end is realized, the battery core can be fully used for electric circulation, and the circulation performance of the battery is improved while the waste of materials is avoided.
In addition, in the embodiment of the present invention, since the positive active material of the positive electrode sheet 20 needs to correspond to the coating of the negative electrode sheet to realize the electrical cycle of the battery, the shape of the positive active material of the first surface of the positive electrode sheet 20 is adapted to the shape of the first negative electrode smear 11, and the size of the positive active material of the first surface of the positive electrode sheet 20 is adapted to the size of the first negative electrode smear 11.
As an alternative embodiment, the projection of the starting end of the positive electrode active material of the positive electrode sheet 20 in the thickness direction of the jellyroll structure corresponds to the starting end of the second negative electrode sheet 12.
In this embodiment, the same position correspondence between the positive plate 20 and the first negative smear 11 requires the positive plate 20 and the second negative smear 12 to be corresponded to each other for effective electrical circulation. Therefore, in the embodiment of the present invention, the projection of the starting end of the positive active material on the second surface of the positive plate 20 in the thickness direction of the positive plate 20 corresponds to the starting end of the second negative smear 12, so as to realize the corresponding adaptation of the position of the battery core at the starting end, and the battery core can be fully used for electrical circulation, thereby improving the cycle performance of the battery while avoiding material waste.
In addition, in the embodiment of the present invention, since the positive active material of the positive electrode sheet 20 needs to correspond to the coating of the negative electrode sheet to realize the electrical cycle of the battery, the shape of the positive active material of the second surface of the positive electrode sheet 20 is set to be adapted to the shape of the second negative electrode smear 12, and the size of the positive active material of the second surface of the positive electrode sheet 20 is set to be adapted to the size of the second negative electrode smear 12.
As an alternative embodiment, the lithium ion battery further comprises a positive electrode tab 21 and a negative electrode tab 13, wherein the positive electrode tab 21 is fixed on the surface of the positive electrode sheet 20, and the negative electrode tab 13 is fixed on the surface of the first empty foil area, the second empty foil area or the intermediate area of the negative electrode sheet.
In this embodiment, an external operating circuit is connected to the positive electrode tab 21 and the negative electrode tab 13, thereby achieving normal electrical circulation of the battery. The positive electrode tab 21 and the negative electrode tab 13 have good conductivity, and electrons can be rapidly conducted to the surface of the positive electrode sheet 20 or the surface of the negative electrode sheet through the current collector.
The embodiment of the application also provides a battery, which comprises the battery cell structure.
It should be noted that the implementation manner of the negative electrode plate embodiment is also applicable to the embodiment of the cell structure, and can achieve the same technical effect, and details are not described here.
The embodiment of the application also provides electronic equipment comprising the battery.
It should be noted that the implementation manner of the above battery embodiment is also applicable to the embodiment of the electronic device, and can achieve the same technical effect, and details are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A negative electrode sheet, comprising: a negative current collector, a first negative smear and a second negative smear, wherein,
the first negative electrode smear is coated on the first surface of the negative electrode current collector, the second negative electrode smear is coated on the second surface of the negative electrode current collector, and the first surface and the second surface of the negative electrode current collector are opposite;
and the negative current collector is made of a lithium copper alloy material.
2. The negative electrode sheet according to claim 1, wherein the content of lithium in the negative electrode current collector is 5% to 80%, and the distance between the first surface and the second surface of the negative electrode current collector is 4 to 12 um.
3. The negative electrode sheet according to claim 1, wherein the lithium copper alloy material comprises a copper material and a lithium material, the copper material has a mesh-like porous skeleton structure provided with a plurality of voids, and the lithium material fills the voids.
4. The negative plate of claim 3, wherein the first negative smear and the second negative smear each comprise at least one of pure silicon, silicon oxygen, graphite, hard carbon, graphite doped silicon, and hard carbon doped silicon materials.
5. A battery cell structure, comprising the negative electrode plate as claimed in any one of claims 1 to 4, further comprising a positive electrode plate and a separator, wherein the separator is disposed between the positive electrode plate and the negative electrode plate, and the positive electrode plate, the separator and the negative electrode plate are wound along the starting end to form a winding core structure.
6. The cell structure of claim 5, wherein the first surface of the negative electrode sheet is provided with a first empty foil area and a first coating area, the first empty foil area is adjacent to the first coating area, and the first negative electrode smear is coated on the first coating area;
and a second empty foil area, an intermediate area and a second coating area are arranged on the second surface of the negative plate, the intermediate area is positioned between the second empty foil area and the second coating area, and the second negative smear is coated on the second coating area.
7. The cell structure of claim 5, wherein the positive plate is coated with a positive active material, and a projection of a starting end of the positive active material of the positive plate in the thickness direction of the winding core structure corresponds to a starting end of the first negative smear.
8. The cell structure of claim 7, wherein a projection of a starting end of the positive active material of the positive plate in the thickness direction of the jelly roll structure corresponds to a starting end of the second negative plate.
9. The cell structure of claim 6, further comprising a positive tab fixed to the surface of the positive plate and a negative tab fixed to the surface of the first empty foil region, the second empty foil region, or the intermediate region of the negative plate.
10. A battery comprising a cell structure according to any of claims 5-9.
CN202111488873.8A 2021-12-08 2021-12-08 Negative plate, battery cell structure and battery Pending CN114171743A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114975978A (en) * 2022-06-24 2022-08-30 中山烯利来设备科技有限公司 Method and device for supplementing lithium to outside of silicon material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107069041A (en) * 2017-04-19 2017-08-18 苏州赛福德备贸易有限公司 A kind of lithium ion battery and preparation method thereof
CN108281664A (en) * 2018-01-22 2018-07-13 欣旺达电子股份有限公司 Negative current collector, lithium ion battery and lithium-ion battery system mend lithium method
CN111446489A (en) * 2020-05-07 2020-07-24 浙江浙能技术研究院有限公司 Lithium ion battery structure and lithium supplementing method
CN112420984A (en) * 2020-11-26 2021-02-26 珠海冠宇电池股份有限公司 Negative plate and lithium ion battery

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107069041A (en) * 2017-04-19 2017-08-18 苏州赛福德备贸易有限公司 A kind of lithium ion battery and preparation method thereof
CN108281664A (en) * 2018-01-22 2018-07-13 欣旺达电子股份有限公司 Negative current collector, lithium ion battery and lithium-ion battery system mend lithium method
CN111446489A (en) * 2020-05-07 2020-07-24 浙江浙能技术研究院有限公司 Lithium ion battery structure and lithium supplementing method
CN112420984A (en) * 2020-11-26 2021-02-26 珠海冠宇电池股份有限公司 Negative plate and lithium ion battery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114975978A (en) * 2022-06-24 2022-08-30 中山烯利来设备科技有限公司 Method and device for supplementing lithium to outside of silicon material

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