CN219534610U - Lug battery cell and battery - Google Patents
Lug battery cell and battery Download PDFInfo
- Publication number
- CN219534610U CN219534610U CN202320092408.0U CN202320092408U CN219534610U CN 219534610 U CN219534610 U CN 219534610U CN 202320092408 U CN202320092408 U CN 202320092408U CN 219534610 U CN219534610 U CN 219534610U
- Authority
- CN
- China
- Prior art keywords
- winding core
- tab
- insulating film
- shell
- electrolyte
- 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.)
- Active
Links
Classifications
-
- 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
Landscapes
- Secondary Cells (AREA)
Abstract
The utility model relates to the technical field of lithium battery cells, in particular to a tab cell and a battery, wherein the tab cell comprises a steel shell, an insulating film shell, a tab winding core and electrolyte, and the insulating film shell is arranged in the steel shell; the pole ear winding core is arranged in the insulating film shell, the positive pole end and the negative pole end of the winding core of the pole ear winding core are respectively welded with a current collecting disc, and the current collecting disc at the negative pole end of the winding core is welded to the steel shell through the bottom of the insulating film shell; the electrolyte is positioned in the insulating film shell and used for infiltrating and penetrating the tab winding core. The tab winding core is subjected to coating process treatment, so that electrolyte infiltrates and permeates the tab winding core in the insulating film shell, the space required by the electrolyte infiltration and permeation process is reduced, the waste of the electrolyte is avoided, the time required by the electrolyte to complete the infiltration and permeation process is reduced, the preparation efficiency of the battery cell and the battery is improved, and the electrical property of the battery cell and the quality of the battery cell are improved.
Description
Technical Field
The utility model relates to the technical field of lithium battery cells, in particular to a tab cell and a battery.
Background
The energy-saving and new energy automobile industry develops rapidly, and the lithium ion battery is widely applied as a power source of the energy-saving and new energy automobile.
In order to obtain smaller internal resistance and better power and quick charge performance, the lithium ion battery starts to adopt the end face full tab welding technology on a large scale. The end face of a battery winding core in the industry is mechanically flattened or ultrasonically flattened, electrolyte injection infiltration is carried out on the winding core in a steel shell after flattening, a gap space exists between the outside of the winding core and the inner wall of the steel shell, electrolyte is injected into the winding core by utilizing the gap space to infiltrate the winding core, the winding core is fully infiltrated, the gap space is fully filled with electrolyte, the winding core is infiltrated from bottom to top in the electrolyte injection process, waste of electrolyte is easily caused, particularly the electrolyte at the lower part is easily infiltrated, redundant electrolyte does not act after infiltration is obtained at the lower part of the winding core, more electrolyte is wasted as the gap space between the winding core and the inner wall of the steel shell is larger, moreover, the time for injecting the electrolyte is more as the winding core is fully infiltrated, and the whole preparation process time of the battery core is longer, so that the efficiency is influenced.
Disclosure of Invention
The utility model provides a tab cell and a battery, which are used for solving the defects that electrolyte is easy to waste and infiltration time is long in the process of infiltrating and penetrating a winding core with electrolyte in the existing cell preparation process, and the cell preparation efficiency is affected, and improving the electrical performance of the cell and the quality of the cell.
The utility model provides a tab cell, which comprises a steel shell, an insulating film shell, a tab winding core and electrolyte, wherein the insulating film shell is arranged in the steel shell; the pole ear winding core is arranged in the insulating film shell, the positive pole end and the negative pole end of the winding core of the pole ear winding core are respectively welded with a current collecting disc, and the current collecting disc at the negative pole end of the winding core is welded to the steel shell through the bottom of the insulating film shell; the electrolyte is positioned in the insulating film shell and used for infiltrating and penetrating the tab winding core.
According to the tab cell provided by the utility model, the shape of the insulating film shell is the same as that of the tab winding core, the upper part of the insulating film shell is opened, the lower part of the insulating film shell is closed, and a channel which is convenient for welding the current collecting disc at the negative end of the winding core and the bottom of the steel shell is arranged in the lower closed area.
According to the tab cell provided by the utility model, the insulating film shell is a transparent shell made of polyethylene terephthalate plastics.
According to the tab cell provided by the utility model, the insulating film shell and the tab winding core are of a cylindrical structure or other structures suitable for the shape of a lithium battery.
According to the tab cell provided by the utility model, the tab winding core is a cylindrical winding core formed by winding a positive pole piece, a diaphragm and a negative pole piece, the insulating film shell is cylindrical with an opening at the upper end and a closed lower end, and a current collecting disc which is convenient for welding the negative end of the winding core and the bottom of the steel shell is arranged at the center of the closed lower end.
According to the tab cell provided by the utility model, the positive electrode plate is prepared by coating positive electrode slurry on aluminum foil, and the positive electrode slurry is prepared from lithium iron phosphate, ternary material, lithium manganate, binder and conductive agent.
According to the tab cell provided by the utility model, the negative electrode plate is prepared by coating a copper foil with negative electrode slurry, and the negative electrode slurry is prepared from a graphite material, a binder and a conductive agent.
According to the tab cell provided by the utility model, the diaphragm is a ceramic diaphragm.
According to the tab cell provided by the utility model, the positive electrode end of the winding core and the negative electrode end of the winding core of the tab winding core are respectively provided with the tab, and the tab is a monopole tab or a bipolar tab or a multipolar tab or a full tab.
The utility model also provides a battery, which comprises the tab cell.
According to the tab battery cell and the battery, in the preparation process, the tab winding core is subjected to coating process treatment, so that electrolyte infiltrates and permeates the tab winding core in the insulating film shell, the space required by the electrolyte infiltration process is reduced, the waste of the electrolyte is avoided, the time required by the electrolyte in the infiltration process can be reduced, the preparation efficiency of the battery cell and the battery is improved, and the electrical performance of the battery cell and the quality of the battery cell are improved.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the component structure inside a steel case of a tab cell provided by the utility model;
fig. 2 is a schematic structural view of a tab winding core provided by the present utility model;
fig. 3 is a schematic structural view of an insulating film shell provided by the utility model;
reference numerals:
1. the positive end of the winding core; 2. a negative end of the winding core; 3. a tab winding core; 4. an insulating film shell; 5. and a round hole.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.
In embodiments of the utility model, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
One embodiment of the utility model provides a tab cell, as shown in fig. 1, comprising a steel shell, an insulating film shell 4, a tab winding core 3 and electrolyte, wherein the insulating film shell 4 is arranged in the steel shell; the electrode ear winding core 3 is arranged in the insulating film shell 4, the winding core positive electrode end 1 and the winding core negative electrode end 2 of the electrode ear winding core 3 are respectively welded with a current collecting disc, and the current collecting disc of the winding core negative electrode end 2 is welded on the steel shell through the bottom of the insulating film shell 4; electrolyte is positioned in the insulating film shell 4 and is used for infiltrating and penetrating the tab winding core 3.
The preparation process of the tab cell of this embodiment is as follows: the positive pole piece, the diaphragm and the negative pole piece are wound into a winding core, as shown in fig. 2, a winding core positive pole end 1 and a winding core negative pole end 2 are formed, and pole lugs are welded on the winding core positive pole end 1 and the winding core negative pole end 2 respectively, wherein the pole lugs are monopole lugs or bipolar lugs or multipolar lugs or full pole lugs, and the electric performance and the electric core quality of the electric core manufactured by the full pole lugs are superior compared with those of electric cores manufactured by other pole lug structures. The positive pole piece is prepared by coating positive pole slurry on an aluminum foil, wherein the positive pole slurry is prepared by lithium iron phosphate, ternary materials, lithium manganate, a binder and a conductive agent; the negative electrode plate is prepared by coating a negative electrode slurry on a copper foil, wherein the negative electrode slurry is prepared by a graphite material, a binder and a conductive agent; the diaphragm is a ceramic diaphragm.
And (3) carrying out a rolling process on the positive end 1 of the winding core and the negative end 2 of the winding core, wherein the rolling process adopts mechanical rolling or ultrasonic rolling to carry out end-flattening operation on the positive end and the negative end of the winding core. And respectively welding the rolled positive electrode end 1 and the rolled negative electrode end 2 of the winding core with current collecting discs to obtain the tab winding core 3.
And coating the tab winding core 3 to enable the tab winding core 3 to be sleeved in the insulating film shell 4. Referring to fig. 1, an insulating film shell 4 together with a tab winding core 3 is put into a steel shell, and a current collecting disc of a winding core negative electrode 2 and the bottom of the steel shell are subjected to spot bottom welding to complete the installation of a battery core structure. Electrolyte is filled into the insulating film shell 4, the tab winding core 3 is infiltrated and permeated through the electrolyte, and the steel shell is sealed, so that the preparation of the battery cell is completed.
In the preparation process of the tab battery core of the embodiment, the tab winding core 3 is subjected to the coating treatment, so that the tab winding core 3 is sleeved in the insulating film shell 4, electrolyte is finally injected into the insulating film shell 4, the tab winding core 3 and the insulating film shell 4 can be attached, and thus when electrolyte is finally injected, compared with the traditional method that electrolyte is required to be injected into a gap space between a steel shell and a winding core, the electrolyte required to be injected is very small, which is equivalent to completely covering a layer of film on the outer surface of the tab winding core 3, and the electrolyte is pressurized by the film, so that the electrolyte is quickly infiltrated into the tab winding core 3. In a combined way, the infiltration process of the whole electrolyte can be reduced compared with the time required in the traditional process, so that the time is saved, and the manufacturing efficiency of the battery cell is improved.
In this embodiment, the shape of the insulating film shell 4 is the same as that of the tab winding core 3, and as shown in fig. 3, the upper opening and the lower closing area of the insulating film shell 4 are closed, and the lower closing area is provided with a channel for facilitating spot bottom welding between the current collecting disc of the winding core negative electrode terminal 2 and the bottom of the steel shell. The insulating film shell 4 is made of transparent high-temperature-resistant polyester film, the material of the insulating film shell is polyethylene terephthalate plastic, the insulating film shell 4 provides space for the infiltration of the lug winding core 3 by injecting electrolyte subsequently, the high-temperature-resistant polyester film made of the polyethylene terephthalate plastic has flexible characteristics, so the insulating film shell 4 is not a rigid shell, the insulating film shell 4 is stretched after being injected with electrolyte, the insulating film shell 4 has a certain elastic deformation and contraction performance, the electrolyte is reacted with the electrolyte due to the characteristics of the insulating film shell 4, the electrolyte is pressed to infiltrate and infiltrate the lug winding core 3, the infiltration efficiency is improved, and the infiltration of the electrolyte is rapidly completed.
In this embodiment, the insulating film case 4 and the tab winding core 3 are cylindrical structures or other structures suitable for the shape of lithium battery. The cylindrical structure is a common lithium battery structure, but the structure of the tab cell provided by the utility model can also be other lithium battery structures, such as square lithium batteries. In this embodiment, the tab winding core 3 is a cylindrical winding core formed by winding a positive electrode plate, a diaphragm and a negative electrode plate, the insulating film shell 4 is a cylindrical shape with an open upper end and a closed lower end, and a circular hole 5 for facilitating welding of a current collecting disc of the negative electrode end 2 of the winding core and the bottom of the steel shell is formed in the center of the closed end of the lower end.
In the battery core in the embodiment, main materials such as lithium iron phosphate, ternary materials, lithium manganate and the like, a binder and a conductive agent are used for preparing positive electrode slurry, the positive electrode slurry is coated on an aluminum foil, and then a positive electrode plate is manufactured; preparing negative electrode slurry by using main materials such as graphite materials, binders and conductive agents, coating the negative electrode slurry on copper foil, and then preparing a negative electrode plate; the diaphragm is made of the ceramic diaphragm material commonly used at present. The prepared positive pole piece, diaphragm and negative pole piece are wound into a cylindrical winding core, as shown in fig. 2, a winding core positive end 1 and a winding core negative end 2 of the cylindrical winding core are formed, and full lugs are welded at the winding core positive end 1 and the winding core negative end 2 respectively.
And the rolling process is carried out on the positive electrode end 1 of the winding core and the negative electrode end 2 of the winding core in a mechanical rolling mode, the mechanical rolling process is used for reducing the height of the cylindrical winding core of the full lug, reducing the heights of the positive electrode full lug of the positive electrode end 1 of the winding core and the full lug of the negative electrode end 2 of the winding core, increasing the contact area of each area of the positive electrode full lug of the positive electrode end 1 of the winding core and the full lug of the negative electrode end 2 of the winding core, carrying out end flattening, and facilitating the laser welding of a subsequent current collecting disc. And (3) respectively welding the rolled positive electrode end 1 and the rolled negative electrode end 2 of the rolled core with current collecting discs to obtain a full-lug cylindrical rolled core (a lug rolled core 3).
The full-tab cylindrical winding core is subjected to coating treatment, so that the tab winding core 3 is sleeved in the insulating film shell 4, and referring to fig. 3, the insulating film shell 4 of the embodiment is cylindrical with an open upper end and a closed lower end, and a current collecting disc which is convenient for the winding core cathode end 2 and a round hole 5 for spot bottom welding of the bottom of the steel shell are formed in the center of the closed end of the lower end.
Referring to fig. 1, an insulating film shell 4 is put into a steel shell together with a tab winding core 3, and a current collecting disc of a winding core negative electrode terminal 2 and the bottom of the steel shell are subjected to spot bottom welding through a round hole 5 of the insulating film shell 4, so that the installation of an electric core structure is completed. Electrolyte is filled into the insulating film shell 4, the tab winding core 3 is infiltrated and permeated through the electrolyte, and the steel shell is sealed, so that the preparation of the cylindrical-structure battery cell is completed.
In the preparation process of the tab battery cell, the process of coating the full tab cylindrical winding core is added, so that the winding core is further infiltrated and permeated by electrolyte in the subsequent liquid injection process, the electrical property of the full tab cylindrical battery cell and the quality of the battery cell are improved, the infiltration efficiency is improved, the infiltration and permeation of the electrolyte are rapidly completed, the time required by the preparation of the battery cell is reduced, and the working efficiency is improved.
The utility model also provides a battery, which comprises the tab cell.
In summary, in the preparation process of the tab battery cell and the battery provided by the utility model, the tab winding core is subjected to the coating process treatment, so that the electrolyte infiltrates and permeates the tab winding core in the insulating film shell, the space required by the electrolyte infiltration process is reduced, the waste of the electrolyte is avoided, the time required by the electrolyte to complete the infiltration process is also reduced, the preparation efficiency of the battery cell and the battery is improved, and the electrical performance of the battery cell and the quality of the battery cell are improved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (8)
1. The utility model provides a utmost point ear electricity core which characterized in that includes:
a steel shell;
an insulating film shell (4), wherein the insulating film shell (4) is arranged in the steel shell;
the electrode lug winding core (3), the electrode lug winding core (3) is arranged in the insulating film shell (4), a winding core positive electrode end (1) and a winding core negative electrode end (2) of the electrode lug winding core (3) are respectively welded with a current collecting disc, and the current collecting disc of the winding core negative electrode end (2) is welded to the steel shell through the bottom of the insulating film shell (4);
and the electrolyte is positioned in the insulating film shell (4) and used for infiltrating and penetrating the tab winding core (3).
2. The tab cell according to claim 1, wherein the insulating film case (4) has the same shape as the tab winding core (3), the upper opening and the lower closing of the insulating film case (4) are closed, and a channel for facilitating welding of the current collecting disc of the winding core negative electrode terminal (2) and the steel case bottom is provided in the lower closing area.
3. The tab cell according to claim 1, wherein the insulating film case (4) is a transparent case made of a polyethylene terephthalate plastic.
4. The tab cell according to claim 1, 2 or 3, wherein the insulation film shell (4) and the tab winding core (3) are of a cylindrical structure.
5. The tab cell according to claim 4, wherein the tab winding core (3) is a cylindrical winding core formed by winding a positive electrode plate, a diaphragm and a negative electrode plate, the insulating film shell (4) is a cylindrical shape with an open upper end and a closed lower end, and a current collecting disc which is convenient for welding the negative electrode end (2) of the winding core and a round hole (5) which is convenient for welding the bottom of the steel shell are arranged at the center of the closed end of the lower end.
6. The tab cell of claim 5, wherein the membrane is a ceramic membrane.
7. The tab cell according to claim 1, wherein the positive end (1) and the negative end (2) of the tab winding core (3) are respectively provided with a tab, and the tab is a monopolar tab or a bipolar tab or a multipolar tab or a full tab.
8. A battery comprising the tab cell of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320092408.0U CN219534610U (en) | 2023-01-31 | 2023-01-31 | Lug battery cell and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320092408.0U CN219534610U (en) | 2023-01-31 | 2023-01-31 | Lug battery cell and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219534610U true CN219534610U (en) | 2023-08-15 |
Family
ID=87580997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320092408.0U Active CN219534610U (en) | 2023-01-31 | 2023-01-31 | Lug battery cell and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219534610U (en) |
-
2023
- 2023-01-31 CN CN202320092408.0U patent/CN219534610U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI517477B (en) | A large capacity cylindrical lithium ion battery and its production method | |
| CN100517852C (en) | A coiling lithium ion battery and its making method | |
| CN101286577A (en) | Lithium ion power cell with high power | |
| CN108461757B (en) | Cylindrical battery and electrode current collecting assembly and manufacturing method thereof | |
| CN205542997U (en) | Polyvinylidene fluoride coating non -woven fabrics diaphragm paper polymer lithium ion secondary cell | |
| CN201478392U (en) | High-power lithium ion power battery with collecting disc | |
| CN112993491A (en) | Lithium battery, battery cell and assembly method | |
| CN202549997U (en) | High-capacity cylindrical lithium ion battery | |
| CN109346627A (en) | Fastening lithium ionic cell | |
| CN207217643U (en) | A kind of lithium ion battery is flexible coupling with conduction and lithium ion battery | |
| CN214797656U (en) | Cylindrical battery | |
| CN206461044U (en) | The box hat cylindrical battery of end face flow guiding structure | |
| CN219534610U (en) | Lug battery cell and battery | |
| CN202308190U (en) | High-rate lithium ion battery with novel pole lugs | |
| CN204991877U (en) | Multipolar ear lithium ion power batteries | |
| CN216389656U (en) | Lithium ion battery with novel cylindrical lug structure | |
| CN206961956U (en) | A kind of lithium ion battery | |
| CN116344961A (en) | Diaphragm-free battery cell, preparation method thereof and lithium ion battery | |
| CN202308197U (en) | Polymer lithium ion battery with internal multi-winding-core parallel structure | |
| CN116315139A (en) | Preparation method of tab cell | |
| CN101499541A (en) | Novel winding type lithium ionic cell and manufacturing method thereof | |
| CN114597556A (en) | Sodium ion electricity core aluminum hull apron | |
| CN115347329A (en) | Novel cylindrical lithium battery busbar structure, battery cell and manufacturing process thereof | |
| CN101752613A (en) | Power soft packaging lithium ion battery with high power | |
| CN114243092A (en) | Square lithium ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |