CN114695898A - Pole piece with through hole and battery - Google Patents

Pole piece with through hole and battery Download PDF

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Publication number
CN114695898A
CN114695898A CN202011621558.3A CN202011621558A CN114695898A CN 114695898 A CN114695898 A CN 114695898A CN 202011621558 A CN202011621558 A CN 202011621558A CN 114695898 A CN114695898 A CN 114695898A
Authority
CN
China
Prior art keywords
pole piece
battery
blank area
hole
active material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011621558.3A
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Chinese (zh)
Inventor
廖栋梁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Xinda New Energy Technology Co ltd
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Shenzhen Xinda New Energy Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Xinda New Energy Technology Co ltd filed Critical Shenzhen Xinda New Energy Technology Co ltd
Priority to CN202011621558.3A priority Critical patent/CN114695898A/en
Priority to PCT/CN2021/139654 priority patent/WO2022143260A1/en
Publication of CN114695898A publication Critical patent/CN114695898A/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
    • H01M4/70—Carriers or collectors characterised by shape or form
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0436—Small-sized flat cells or batteries for portable equipment
    • 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
    • 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
    • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The invention discloses a pole piece suitable for a watchband, which relates to the technical field of pole pieces and comprises a current collector, a connecting belt and an active material layer; the number of the current collectors is more than two, the connecting band is positioned between the adjacent current collectors, the connecting band and the current collectors are integrally formed, and the connecting band is provided with through holes; be equipped with blank area and material covering district on the mass flow body, blank area is located the tip of mass flow body, and blank area is connected with the connecting band, and the active material layer is located the material covering district. The invention has the beneficial effects that: the connecting belt of the pole piece is provided with the through hole, so that the pole piece is suitable for watchbands of various watches or other electronic products.

Description

Pole piece with through hole and battery
Technical Field
The invention relates to the technical field of pole pieces, in particular to a pole piece with a through hole and a battery.
Background
With the progress of human society, various energy storage devices play an increasingly important role in human life. All kinds of electronic equipment at present use the energy storage device of traditional structure to supply energy, and traditional energy storage device is mainly for having two shortcomings: firstly, the current wearable electronic devices use traditional rigid and inflexible batteries, which results in short endurance of the wearable electronic devices, such as smart watches and bracelets; secondly, ordinary battery structure adopts the pole piece of ordinary both ends play utmost point ear, causes the charge-discharge performance of battery poor like this, and new energy automobile and unmanned aerial vehicle need often use big multiplying power charge-discharge at present, and traditional structure has been difficult to satisfy the requirement.
The intelligent watch and the bracelet need often charge in the use, therefore, need install the battery in the watchband of intelligent watch and bracelet, in order to improve standby time, as the patent publication of CN204925647U discloses an intelligent watch, this intelligent watch still includes reserve battery, reserve battery sets up in the watchband, this reserve battery is flexible battery, but adjacent reserve sub battery needs to be connected through the wire electricity that sets up in the linkage unit, the dead area of battery is many, thereby lead to battery capacity lower, if the wire is welded on the battery simultaneously, the welding position internal resistance is big, can make the whole internal resistance increase of battery.
The battery in the battery pack of the new energy automobile adopts a plurality of small batteries connected in series and in parallel to form a large battery, and as the patent application with the publication number of CN 110518156A, the following problems can be caused; second, welding a single small cell into a large cell can cause the internal resistance of the large cell to increase; third, the charging and discharging speed is reduced when small batteries are connected in series and in parallel to form a large battery.
Disclosure of Invention
The invention aims to solve the technical problem that the integral internal resistance of the battery in the prior art is increased.
The invention solves the technical problems through the following technical means:
the invention provides a pole piece with a through hole, which comprises a current collector, a connecting belt and an active material layer; the number of the current collectors is more than two, the connecting band is positioned between the adjacent current collectors, and through holes are formed in the connecting band;
be equipped with blank area and material covering district on the mass flow body, blank area is located the tip of mass flow body, blank area is connected with the connecting band, the active material layer is located the material covering district.
Has the advantages that: the pole piece is provided with the through hole, is suitable for various wearable electronic devices such as watchbands, earphones and intelligent socks, can reduce the weight, is particularly suitable for watches and bracelets, and the battery obtained by adopting the pole piece has small dead area and can improve the capacity of the battery.
Meanwhile, the pole piece has excellent bending performance and safety.
When the pole piece is used for the battery, the pole lugs can be directly welded on the blank area of the current collector, the integral internal resistance of the battery can be reduced, and the charge and discharge performance and capacity of the battery are improved.
Preferably, the number of the connecting bands is multiple.
Preferably, the connecting band is polygonal or any side of the connecting band is arc-shaped.
Preferably, the connecting band is in a shape of a square, a trapezoid, a diamond, a convex polygon or a concave polygon.
Preferably, the number of the current collectors is two, and the blank area and the material covering area are respectively located at two ends of the current collector.
Preferably, the current collector covers the one end in material district and is equipped with and is used for utmost point ear welded to leave white district, it is located the both ends that cover the material district respectively to leave white district and blank area.
Has the advantages that: a blank area is arranged at one end of the current collector covering area and used for welding a tab, and the second current collector covering area is not provided with the blank area, so that the size of the pole piece can be reduced.
Preferably, the number of the current collectors is more than two, and the current collectors are arranged in a straight line.
Has the advantages that: the number of current collectors can be set according to the length of the watchband.
Preferably, the number of the through holes is multiple.
Preferably, the number of the through holes is two, three or more than four.
Preferably, the through holes are circular, square, diamond, triangular or trapezoidal.
Has the advantages that: can be arranged according to the shape of the through hole on the watchband.
Preferably, the current collector is a copper foil, and the active material layer is a negative active material layer.
Has the advantages that: when the current collector is a copper foil and the active material layer is a negative active material layer, the pole piece is a negative pole piece.
Preferably, the current collector is an aluminum foil, and the active material layer is a positive active material layer.
Has the advantages that: when the current collector is an aluminum foil and the active material layer is a positive active material layer, the pole piece is a positive pole piece.
Preferably, the shape of the current collector is square, circular, triangular, diamond-shaped or trapezoidal.
Preferably, the blank area is provided with an active material layer.
The invention also provides a battery comprising the pole piece.
Has the advantages that: the battery has small invalid area, the capacity of the battery can be improved, meanwhile, the current collectors are connected through the connecting belt, the connecting belt and the current collectors are integrally formed, welding is not needed, the internal resistance of the battery can be reduced, the performance attenuation of the battery is reduced, the charging and discharging rate is increased, the battery is suitable for wearable electronic equipment, particularly watches and bracelets, and the battery has excellent bending performance and safety performance.
Preferably, a positive active material layer is arranged on the blank area of the positive pole piece.
Has the advantages that: because the thickness of copper foil is generally less than the thickness of aluminium foil, set up anodal active material layer on the blank area of positive pole piece, can protect edge part not destroyed when the encapsulation, reduce the probability of battery short circuit simultaneously.
Preferably, the size of the blank area of the positive electrode plate is smaller than that of the blank area of the negative electrode plate.
Has the advantages that: the probability of battery short circuit is reduced.
The invention has the advantages that: the pole piece is suitable for various wearable electronic devices, such as watchbands, earphones and intelligent socks, the connecting belt of the pole piece is provided with the through hole, the pole piece is particularly suitable for watches and bracelets, the battery obtained by adopting the pole piece has small invalid area, the capacity of the battery can be improved, meanwhile, the current collectors are connected through the connecting belt, the connecting belt and the current collectors are integrally formed, welding is not needed, and the internal resistance of the battery can be reduced. The pole piece has excellent bending performance and safety.
A blank area is arranged at one end of the current collector covering area and used for welding a tab, and the second current collector covering area is not provided with the blank area, so that the size of the pole piece can be reduced.
The number of the current collectors can be set according to the length of the watchband. Can be arranged according to the shape of the through hole on the watchband.
When the pole piece is used for the battery, the pole lugs can be directly welded on the blank area of the current collector, the integral internal resistance of the battery can be reduced, and the charge and discharge performance and capacity of the battery are improved.
The battery is suitable for wearable electronic equipment, particularly watches and bracelets, and has excellent bending performance and safety performance.
Drawings
FIG. 1 is a schematic structural diagram of a pole piece in example 1 of the present invention;
FIG. 2 is a schematic structural diagram of a pole piece in example 2 of the present invention;
FIG. 3 is a schematic structural diagram of a pole piece in example 3 of the present invention;
FIG. 4 is a schematic structural diagram of a pole piece in example 4 of the present invention;
FIG. 5 is a schematic structural diagram of a pole piece in example 5 of the present invention;
FIG. 6 is a schematic structural diagram of a pole piece in example 6 of the present invention;
FIG. 7 is a schematic structural view of a pole piece in example 7 of the present invention;
FIG. 8 is a schematic structural diagram of a pole piece in example 8 of the present invention;
in the figure: a current collector 11; a first current collector 111; a second current collector 112; a blank area 12; a first blank area 121; a second blank area 122; a material-covering region 13; a first cladding region 131; a second material coverage area 132; a connecting band 14; a blank region 15; a through hole 16.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. 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.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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 identical elements in a process, method, article, or apparatus that comprises the element.
Example 1
A pole piece with through holes, as shown in fig. 1, includes a current collector 11, a connection band 14, and an active material layer (not shown), where the current collector 11 is provided with a blank area 12 and a material covering area 13, and the number of the current collectors 11 in this embodiment is two.
The current collector 11 includes a first current collector 111 and a second current collector 112, in this embodiment, the shapes of the first current collector 111 and the second current collector 112 are both square but not limited to square, or circular, triangular, diamond-shaped, or trapezoidal, the connection band 14 is located between the first current collector 111 and the second current collector 112, and the connection band 14 is integrally formed with the first current collector 111 and the second current collector 112.
Two ends of the first current collector 111 are respectively provided with a first blank area 121 and a first material covering area 131, the first blank area 121 is rectangular, the first material covering area 131 is square, the size of the first blank area 121 is smaller than that of the first material covering area 131, and the first blank area 121 is connected with the connecting band 14.
The two ends of the second current collector 112 are respectively provided with a second blank area 122 and a second material covering area 132, the second blank area 122 is rectangular, the second material covering area 132 is square, the size of the second blank area 122 is smaller than that of the second material covering area 132, and the second blank area 122 is connected with the connecting band 14. In this embodiment, the first blank area 121, the connecting band 14 and the second blank area 122 are square.
The center of the connecting band 14 is provided with a through hole 16, the number and size of the through holes 16 are set according to actual needs, and the shape of the through holes in the embodiment is circular, but not limited to circular, and may be square, diamond, triangle or trapezoid. Active material layers are respectively coated on the first and second coating regions 131 and 132.
In order to facilitate the tab welding, a blank area 15 is disposed at one end of the first material covering area 131 or one end of the second material covering area 132, the blank area 15 and the first current collector 111 or the second current collector 112 are integrally formed, the blank area 15 and the first blank area 121 are respectively disposed at two ends of the first material covering area 131, or the blank area 15 and the second blank area 122 are respectively disposed at two ends of the second material covering area 132.
When the first current collector 111 and the second current collector 112 are both copper foils, the active material layer is a negative active material layer, wherein the negative active material layer is a prior art, and the pole piece is a negative pole piece.
When the first current collector 111 and the second current collector 112 are both aluminum foils, the active material layer is a positive active material layer, where the positive active material layer is a prior art, and the pole piece is a positive pole piece at this time.
The beneficial effects of the embodiment are that: the pole piece in this embodiment is applicable to various wearable electronic equipment, sets up through-hole 16 on the connecting band of pole piece, is particularly useful for the watchband of various wrist-watches or other electronic product, and the battery that adopts this pole piece to obtain, battery invalid area is few, can improve the capacity of battery, connects through connecting band 14 between the mass flow body 11 simultaneously, and connecting band 14 and mass flow body 11 integrated into one piece need not the welding, can reduce the internal resistance of battery. Meanwhile, the pole piece has excellent bending performance and safety.
Example 2
This embodiment is different from embodiment 1 in that: as shown in fig. 2, the number of current collectors 11 is three, and the three current collectors 11 are arranged in a straight line.
The beneficial effects of this embodiment: the number of current collectors 11 may be set according to the length of the band.
Example 3
This embodiment is different from embodiment 2 in that: as shown in fig. 3, the first blank area 121, the connecting band 14 and the second blank area 122 are H-shaped.
Example 4
This embodiment is different from embodiment 3 in that: as shown in fig. 4, the connecting band 14 has a trapezoid shape, and the through hole 16 has a circular shape in this embodiment, but is not limited to a circular shape, and may have a square shape, a diamond shape, a triangular shape, or a trapezoid shape. The shape and number of the connection bands 14 and the shape and number of the through holes 16 may be arbitrarily combined.
Example 5
This embodiment is different from embodiment 3 in that: as shown in fig. 5, the number of the connecting bands 14 is plural, and the number of the connecting bands 14 in this embodiment is 2, but not limited to two, and one connecting band 14 in this embodiment is provided with a through hole 16, and the through hole 16 is circular, but not limited to circular, and may be square, diamond, triangle, or trapezoid. The shape and number of the connection bands 14 and the shape and number of the through holes 16 may be arbitrarily combined.
Example 6
This embodiment is different from embodiment 5 in that: as shown in fig. 6, the two connecting bands 14 are provided with through holes 16, in this embodiment, one through hole 16 is circular, the other through hole 16 is triangular, and the shape and number of the connecting bands 14 and the shape and number of the through holes 16 can be combined optionally.
Example 7
This embodiment is different from embodiment 3 in that: as shown in fig. 7, the connecting band 14 is dodecagonal, the number of the through holes 16 is two in the present embodiment, and the through holes 16 are square, but not limited to square, and may be circular, rhombic, triangular, or trapezoidal. The shape and number of the connection bands 14 and the shape and number of the through holes 16 may be arbitrarily combined.
Example 8
This embodiment is different from embodiment 3 in that: as shown in fig. 8, the connecting band 14 is rectangular, wherein both sides of the connecting band 14 are arc-shaped, the bending direction of the arc-shaped is set according to actual needs, and the through holes 16 in this embodiment are square, but not limited to square, and may be circular, diamond, triangle, or trapezoid. The shape and number of the connection bands 14 and the shape and number of the through holes 16 may be arbitrarily combined.
Example 9
This embodiment is different from embodiment 1 in that: the blank region 12 is provided with an active material layer.
Example 10
This embodiment is different from embodiment 2 in that: wherein 1 or 3 of the blank regions 12 are provided with an active material layer.
Example 11
The present embodiment is different from the above embodiments in that: the embodiment provides a battery, which comprises a positive pole piece, a diaphragm and a negative pole piece, wherein the positive pole piece, the diaphragm and the negative pole piece are sequentially wound or laminated, and the shape of the diaphragm corresponds to the shapes of the positive pole piece and the negative pole piece.
The above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. The utility model provides a pole piece of band-pass hole which characterized in that: the current collector, the connecting belt and the active material layer are included; the number of the current collectors is more than two, the connecting band is positioned between the adjacent current collectors, and through holes are formed in the connecting band;
be equipped with blank area and material covering district on the mass flow body, blank area is located the tip of mass flow body, blank area is connected with the connecting band, the active material layer is located the material covering district.
2. The pole piece with through hole of claim 1, wherein: the number of mass flow body is two, blank area and material covering district are located the both ends of mass flow body respectively.
3. The pole piece with a through hole of claim 1, wherein: one end in the mass flow body material covering area is equipped with and is used for utmost point ear welded to leave white district, it is located the both ends in material covering area respectively with blank district to leave white district.
4. The pole piece with through hole of claim 1, wherein: the number of the current collectors is more than two, and the current collectors are arranged in a straight line.
5. The pole piece with a through hole of claim 1, wherein: the through holes are round, square, diamond, triangular or trapezoidal.
6. The perforated pole piece according to any one of claims 1 to 5, wherein: the number of the connecting bands is multiple.
7. The perforated pole piece of claim 6, wherein: the connecting belt is polygonal or any side of the connecting belt is arc-shaped.
8. The perforated pole piece of claim 7, wherein: the blank area is provided with an active material layer.
9. A battery comprising the through-holed pole piece of any one of claims 1-8.
10. The battery of claim 9, wherein: the pole piece comprises a positive pole piece and a negative pole piece, and the battery comprises the positive pole piece, a diaphragm and the negative pole piece.
CN202011621558.3A 2020-12-30 2020-12-30 Pole piece with through hole and battery Pending CN114695898A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202011621558.3A CN114695898A (en) 2020-12-30 2020-12-30 Pole piece with through hole and battery
PCT/CN2021/139654 WO2022143260A1 (en) 2020-12-30 2021-12-20 Pole piece, battery comprising pole piece, and manufacturing methods

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011621558.3A CN114695898A (en) 2020-12-30 2020-12-30 Pole piece with through hole and battery

Publications (1)

Publication Number Publication Date
CN114695898A true CN114695898A (en) 2022-07-01

Family

ID=82133559

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011621558.3A Pending CN114695898A (en) 2020-12-30 2020-12-30 Pole piece with through hole and battery

Country Status (1)

Country Link
CN (1) CN114695898A (en)

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