CN110034326A - A kind of lithium battery and preparation method thereof of no tab - Google Patents
A kind of lithium battery and preparation method thereof of no tab Download PDFInfo
- Publication number
- CN110034326A CN110034326A CN201910274233.3A CN201910274233A CN110034326A CN 110034326 A CN110034326 A CN 110034326A CN 201910274233 A CN201910274233 A CN 201910274233A CN 110034326 A CN110034326 A CN 110034326A
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- China
- Prior art keywords
- tab
- main casing
- lithium battery
- material area
- shell
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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
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of lithium batteries of no tab, are related to field of batteries, mainly for solving the problems, such as that traditional lithium battery is realized brought by electrical connection using welding；The lithium battery includes shell and the electrode assembly that is made of at least one positive plate, a negative electrode tab and a porous insulating film, and the shell includes open-topped main casing and mechanical seal in the open-topped connection shell of main casing；The connection shell includes at least one metalwork and an insulating part；The positive plate and negative electrode tab include material area and non-material area, and wherein the edge of non-material area exceeds the edge of porous insulating film；The non-material area of the positive plate and negative electrode tab respectively with main casing and metalwork Mechanical Contact.The present invention realizes that the point of positive and negative electrode and shell connects by the way of Mechanical Contact, without carrying out welding sequence, has abandoned traditional lithium battery and has used drawback brought by tab, practical value with higher.
Description
Technical field
The present invention relates to field of batteries, the lithium battery and preparation method thereof of specifically a kind of no tab.
Background technique
It is well known that lithium ion battery is that one kind can be with the electrochmical power source of repeated charge.The active material of anode is general
For the metallic compound containing lithium, such as cobalt acid lithium, lithium nickelate, LiMn2O4, LiFePO4 either several metallic elements it is compound
Compound.The active material of cathode is generally graphited carbon, silicon-carbon alloy either silicon lithium alloy etc..When charging, lithium from
Son is detached from from anode, is embedded in cathode；Process is opposite when electric discharge.So lithium ion battery is commonly called as " rocking chair batteries " again.
The structure of lithium ion battery includes several essential components.Positive (or group), cathode (or group), porous isolation
Film, electrolyte, shell seal assembly etc., as shown in attached drawing 6C.Wherein the manufacturing process of positive and negative electrode is generally as follows.Powdered work
Property substance and conductive agent, bonding agent and other additives be coated after high-speed stirred is dispersed into uniform slurry or be embedded into and lead
The two sides of electric substrate such as metal foil or net metal through roller compaction after drying, then cuts into the rectangle pole of any length and width
Piece.The partial region two sides of general pole piece head-tail or centre does not have active material, welds one or several in these white spaces
Metal foil, is commonly called as " tab " in battery industry.As fig. 6a illustrates." tab " of two electrodes respectively with the metal of battery
Shell or top metal component are connected by welding.The conductive base of anode is generally aluminium or its alloy material, the conduction of cathode
Substrate is generally copper or its alloy." tab " is generally the metal materials such as aluminium, nickel, copper.Anode and cathode and porous plastics are thin
Slider made of film forms electrode assembly by way of winding or putting down and fold.Attached drawing 6B illustrates one kind and typically passes through winding
The electrode assembly of formation.Electrode assembly is placed in the tank-like shell of metal stretching formation, one of electrode " tab " and shell
It is weldingly connected, the top metal component of " tab " and battery of another electrode is weldingly connected, and top metal component is pre-placed
In a plastic ring component, the internal diameter and outer diameter of the component are fitted close on the outside of top metal with case inside respectively.To
After enclosure interior injects the organic solution of lithium salts, cover top portion is compressed by machine die and stamping device, reaches electricity
The purpose of pond sealing.
It will be evident that the structure and manufacturing technology of above-mentioned traditional lithium-ion battery come with some shortcomings.First, the water conservancy diversion of pole piece
And electrode and outer cover metal component are all to be completed by the foil of limited areal, and the connection between three is all to pass through weldering
The mode connect connects, known welding manner whatever, electric resistance welding as everyone knows, supersonic welding, electric resistance welding etc.,
The area of its welding position and pad is more limited.Such structure will lead to the insufficient of electrode active material performance, and
And the loss of power output and input is larger, the especially bigger occasion of output input current, such as quick charge or quickly puts
The situation of electricity.Second, above-mentioned welding process inevitably generates metal protuberance even metal burr in welding position, so that electric
Pond generates electrical short between the electrode in assembling process or in battery use process and between electrode and shell, causes electricity
Defect of the pond in safety and function.
Summary of the invention
The purpose of the present invention is to provide a kind of lithium batteries and preparation method thereof of no tab, to solve the above problems.
To achieve the above object, the invention provides the following technical scheme:
A kind of lithium battery of no tab, including shell and by least one positive plate, a negative electrode tab and one it is porous absolutely
The electrode assembly that velum is constituted, the shell includes open-topped main casing and mechanical seal in the open-topped company of main casing
Body contact body；The connection shell includes at least one metalwork and an insulating part；The positive plate and negative electrode tab include
Expect area and non-material area, wherein the edge of non-material area exceeds the edge of porous insulating film；The non-material area of the positive plate and negative electrode tab
Respectively with main casing and metalwork Mechanical Contact.
In a kind of optinal plan: being additionally provided with separator between the electrode assembly and main casing.
In a kind of optinal plan: the main casing is cylindrical or rectangular.
In a kind of optinal plan: the electrode assembly is helical form winding or flat stack structure.
In a kind of optinal plan: the metalwork is stamped to form by aluminium flake.
In a kind of optinal plan: integrally formed with several random distributions on the main casing and the contact surface of non-material area
Protrusion.
In a kind of optinal plan: the protrusion is in dotted or striated.
The preparation method of the lithium battery of the no tab, comprising the following steps:
1) prepare metal foil, active material is coated in other regions of the two sides of metal foil in addition to edge, from
And it is formed with material area and non-material area, then through roller-compaction and it is tailored into electrode slice；
2) prepare porous insulating film, form electrode assembly by way of winding or stacking with electrode slice；
3) preparation cylinder or rectangular outer housing, electrode assembly is placed in outer housing；
4) prepare separator, fitting is put into outer housing, makes the upper end edge of the edge covering electrode group part of separator
Edge；
5) electrolyte is injected into outer housing；
6) the connection shell being made of metalwork and insulating part is prepared, by connection shell mechanical seal in the opening of main casing
Side, at the same make the non-material area of positive plate and negative electrode tab respectively with main casing and metalwork Mechanical Contact.
Compared to the prior art, beneficial effects of the present invention are as follows:
The present invention realizes that the point of positive and negative electrode and shell connects by the way of Mechanical Contact, without carrying out welding sequence, gets rid of
It has abandoned traditional lithium battery and has used drawback brought by tab, practical value with higher.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2A to 2B is the structural schematic diagram of electrode slice in the present invention.
Fig. 3 is the structural schematic diagram that shell is connected in the present invention.
Fig. 4 A to 4B is the structural schematic diagram of electric machine assembly in the present invention.
Fig. 5 A to 5C is the schematic diagram of preparation process in the present invention.
Fig. 6 A to 6C is the structural schematic diagram of existing lithium battery.
Specific embodiment
Following embodiment can be described in detail the present invention in conjunction with attached drawing, in attached drawing or explanation, similar or identical part
Using identical label, and in practical applications, shape, thickness or the height of each component can be expanded or shunk.Institute of the present invention
Each embodiment enumerated is only to illustrate the present invention, is not used to limit the scope of the present invention.It is made for the present invention any aobvious
And modification easy to know or change are without departure from spirit and scope of the invention.
Embodiment 1
A kind of lithium battery of no tab, including shell and by least one positive plate, a negative electrode tab and one it is porous absolutely
The electrode assembly that velum is constituted, the shell includes open-topped main casing and mechanical seal in the open-topped company of main casing
Body contact body；The connection shell includes at least one metalwork and an insulating part；The positive plate and negative electrode tab include
Expect area and non-material area, wherein the edge of non-material area exceeds the edge of porous insulating film；The non-material area of the positive plate and negative electrode tab
Respectively with main casing and metalwork Mechanical Contact；
The main casing is cylindrical or rectangular.
For convenience of understanding, above scheme is specifically described below in conjunction with diagram:
As shown in Figure 1, the 100 entire batteries of mark of mark, the shell includes main casing 101 and by upper cover 107, lower cover
108 and rubber ring 106 constitute connection shell, wherein lower cover 108 be above-mentioned metalwork, rubber ring 106 be above-mentioned insulation
Part, main casing 101 is cylindrical in the figure；
The electrode assembly 109 includes positive and negative plate (not doing leader in figure), porous insulating film 104, positive plate
One end has positive blank foil 102, and one end of negative electrode tab has cathode blank foil 103, wherein positive 102 He of blank foil
The edge of the as above-mentioned non-material area of cathode blank foil 103, positive blank foil 102 and cathode blank foil 103 exceeds more
Hole insulating film 104；The upper end of the anode blank foil 102 and 108 Mechanical Contact of lower cover, the lower end of cathode blank foil 103
With 101 Mechanical Contact of main casing, being electrically connected for positive and negative plate and shell can be realized without carrying out welding in this way.
The specific structure of positive and negative plate is described below in conjunction with diagram:
As shown in Figure 2 A and 2B, the main body of positive and negative plate is metal foil, wherein 202 and 203 signal electrode of mark
The region that active material occupies, mark 201 and 204 illustrate the blank foil region of electrode.
It is described below in conjunction with specific structure of the diagram to connection shell:
As shown in figure 3, wherein mark 301 is plastic insulating ring, the mark 106 in corresponding diagram 1；Mark 302 is plating nickel gold
Belong to the upper cover being stamped to form, the mark 107 in corresponding diagram 1；Mark 303 is the lower cover that aluminium flake is stamped to form, the mark in corresponding diagram 1
Note 108.
The specific structure of electrode assembly is described below in conjunction with diagram:
As shown in figure 4, mark 401 is electrode isolation body, provided in the form of winding, outermost circuit covering is porous plastics
Film；Mark 402 is cathode blank foil region, and end face exceeds the lower part of plastic foil；Mark 403 is positive pole blank foil area
Domain, end face exceed the top of plastic foil；Mark 404 is the hollow cavity of electrode isolation body component, is by electrode and isolation
Film roll around when core used extraction after formed.
Further, separator is additionally provided between the electrode assembly 109 and main casing；
As shown in Figure 1, the separator is plastic ring 105 in the present embodiment, the top of electrode assembly 109 can be played
Insulating effect between positive blank foil end face and main casing 101.
Further, integrally formed with the protrusion of several random distributions on the main casing and the contact surface of non-material area；
The protrusion is in dotted or striated.
For convenience of being compareed with the prior art, existing lithium battery structure will simply be described below, specifically
As shown in Fig. 6 A to Fig. 6 C.
Fig. 6 A illustrates that the electrode plane figure of routine techniques lithium ion battery.601 regions indicated are that front and back sides all apply
Cover or be filled with the region of active material；604 regions indicated are that front and back sides all do not coat or be filled with the sky of active material
White metal foil region；602 be strip metal band, the fluid conducting material as electrode；Region shown in 603 indicates strip metal
602 regions welded with the blank foil of electrode.
Fig. 6 B illustrates that the oblique view of the electrode isolation body component of routine techniques lithium ion battery.605 and 608 are respectively
The drainage metal band of cathode and anode；606 be the main body of electrode isolation body component, and outmost turns are porous plastic film；607 be hollow
Cavity is formed after core extraction used when being wound by electrode and isolation film.
Fig. 6 C illustrates that the typical cross section of routine techniques lithium ion battery.Region shown in 616 be anode with
The welding position of battery top metal parts realizes the external water conservancy diversion of battery with this；Region shown in 617 be battery cathode with
The welding position of battery metal shell bottom realizes the external water conservancy diversion of battery with this.
Embodiment 2
A kind of preparation method of the lithium battery of no tab, comprising the following steps:
1) prepare metal foil, active material is coated in other regions of the two sides of metal foil in addition to edge, from
And it is formed with material area and non-material area, then through roller-compaction and it is tailored into electrode slice；
2) prepare porous insulating film, form electrode assembly by way of winding or stacking with electrode slice；
3) preparation cylinder or rectangular outer housing, electrode assembly is placed in outer housing；
4) prepare separator, fitting is put into outer housing, makes the upper end edge of the edge covering electrode group part of separator
Edge；
5) electrolyte is injected into outer housing；
6) the connection shell being made of metalwork and insulating part is prepared, by connection shell mechanical seal in the opening of main casing
Side, at the same make the non-material area of positive plate and negative electrode tab respectively with main casing and metalwork Mechanical Contact.
Below in conjunction with attached drawing 5A to 5C to the carry out directviewing description of above-mentioned steps:
Region shown in 509 in Fig. 5 A is the arc groove that main casing 501 is formed through mechanical compression, by electrode isolation body component
It is limited in bottom portion of groove region with plastic insulating ring, 506, the 507,508 of connection shell will be constituted and be placed in 501 top of shell, quilt
It is limited in the upper area of groove.
Region shown in 510 in Fig. 5 B is by known mechanical means that shell upper region and component 506 is inside together
Press certain pressure still further below after bending, and component 506 is made to generate certain decrement, ensure that the liquids and gases of inside battery
It is isolated with extraneous, reaches sealing effect.
In Fig. 5 C 511 show by axial compressive force from top to bottom make battery arc groove generate compression, groove top
The whole translation downwards of battery top component, top component 511 and positive top exposed blank foil region 512 are in close contact, and
Certain pressure is generated, ensure that the electronic drainage of anode.
The above, the only specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, it is any
Those familiar with the art can easily think of the change or the replacement in the technical scope that the disclosure discloses, and should all contain
It covers within the protection scope of the disclosure.Therefore, the protection scope of the disclosure should be subject to the protection scope in claims.
Claims (8)
1. a kind of lithium battery of no tab, including shell and by least one positive plate, a negative electrode tab and a porous insulation
The electrode assembly that film is constituted, the shell includes open-topped main casing and mechanical seal in the open-topped connection of main casing
Shell；It is characterized in that, the connection shell includes at least one metalwork and an insulating part；The positive plate and negative electrode tab
It include material area and non-material area, wherein the edge of non-material area exceeds the edge of porous insulating film；The positive plate and negative electrode tab
Non-material area respectively with main casing and metalwork Mechanical Contact.
2. the lithium battery of no tab according to claim 1, which is characterized in that between the electrode assembly and main casing also
It is provided with separator.
3. the lithium battery of no tab according to claim 1, which is characterized in that the main casing is cylindrical or square
Shape.
4. the lithium battery of no tab according to claim 1, which is characterized in that the electrode assembly be helical form winding or
The flat stack structure of person.
5. the lithium battery of no tab according to claim 1, which is characterized in that the metalwork by aluminium flake, stainless steel or
Other metal foils are stamped to form.
6. the lithium battery of no tab according to claim 1, which is characterized in that the contact surface of the main casing and non-material area
On integrally formed with several random distributions protrusion.
7. the lithium battery of no tab according to claim 1, which is characterized in that the protrusion is in dotted or striated.
8. the preparation method of the lithium battery of no tab as claimed in claim 1, which is characterized in that including following step
It is rapid:
1) prepare metal foil, active material is coated in other regions of the two sides of metal foil in addition to edge, thus shape
At the area You Liao and non-material area, then roller-compaction and it is tailored into electrode slice；
2) prepare porous insulating film, form electrode assembly by way of winding or stacking with electrode slice；
3) preparation cylinder or rectangular outer housing, electrode assembly is placed in outer housing；
4) prepare separator, fitting is put into outer housing, makes the upper end-face edge of the edge covering electrode group part of separator；
5) electrolyte is injected into outer housing；
6) prepare the connection shell that is made of metalwork and insulating part, will connection shell mechanical seal in the open side of main casing,
Simultaneously make the non-material area of positive plate and negative electrode tab respectively with main casing and metalwork Mechanical Contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910274233.3A CN110034326A (en) | 2019-04-08 | 2019-04-08 | A kind of lithium battery and preparation method thereof of no tab |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910274233.3A CN110034326A (en) | 2019-04-08 | 2019-04-08 | A kind of lithium battery and preparation method thereof of no tab |
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| Publication Number | Publication Date |
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| CN110034326A true CN110034326A (en) | 2019-07-19 |
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| CN201910274233.3A Pending CN110034326A (en) | 2019-04-08 | 2019-04-08 | A kind of lithium battery and preparation method thereof of no tab |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397683A (en) * | 2020-11-17 | 2021-02-23 | 辽宁九夷锂能股份有限公司 | Electrodeless lithium battery and preparation method thereof |
| WO2022213400A1 (en) * | 2021-04-09 | 2022-10-13 | 江苏时代新能源科技有限公司 | Battery cell and manufacturing method and system therefor, battery, and electrical device |
| WO2023004824A1 (en) * | 2021-07-30 | 2023-02-02 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, electrical device, and device for manufacturing battery cell |
| CN115968515A (en) * | 2022-02-18 | 2023-04-14 | 宁德时代新能源科技股份有限公司 | Battery, electric equipment, method and equipment for preparing battery |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397683A (en) * | 2020-11-17 | 2021-02-23 | 辽宁九夷锂能股份有限公司 | Electrodeless lithium battery and preparation method thereof |
| CN112397683B (en) * | 2020-11-17 | 2023-10-17 | 辽宁九夷锂能股份有限公司 | Electrodeless ear lithium battery and preparation method thereof |
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| CN115968515B (en) * | 2022-02-18 | 2024-01-12 | 宁德时代新能源科技股份有限公司 | Battery, electric device, method and equipment for preparing battery |
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