CN109599597A - A kind of high current battery core and the power battery comprising the battery core - Google Patents
A kind of high current battery core and the power battery comprising the battery core Download PDFInfo
- Publication number
- CN109599597A CN109599597A CN201710923326.5A CN201710923326A CN109599597A CN 109599597 A CN109599597 A CN 109599597A CN 201710923326 A CN201710923326 A CN 201710923326A CN 109599597 A CN109599597 A CN 109599597A
- Authority
- CN
- China
- Prior art keywords
- negative electrode
- battery
- battery core
- current collector
- negative
- 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
Links
Classifications
-
- 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
- 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
- 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- 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
Abstract
The invention discloses a kind of high current battery core and include the power battery of the battery core.The battery core includes: negative electrode tab, diaphragm and positive plate, and negative electrode tab and positive plate are separated by the diaphragm and wind to form battery core, and the negative electrode tab is integrated in one with negative electrode lug；In the deployed state, negative electrode slurry is coated in addition to the white space reserved along side on negative current collector；And the negative electrode slurry layer that coating zone is formed constitutes negative electrode tab with negative current collector, the negative current collector of white space is as negative electrode lug.In battery core of the invention, negative electrode lug and negative electrode tab are integrated, the stable structure after winding, without the tab that additionally accesses or weld come the problems such as connecting, avoid the failure welding as caused by welding process.Moreover, because increasing the contact area of cathode Yu steel shell metal, without connecting metal by welding, to be effectively improved high internal resistance phenomenon caused by rosin joint, the heavy-current discharge performance of power battery is improved, improves production qualification rate.
Description
Technical field
The invention belongs to technical field of lithium batteries, are related to a kind of battery core, more particularly to a kind of big electricity of 18650 power batteries
Galvanic electricity core, power battery and manufacturing process.
Background technique
As the function of 18650 power batteries is increasing and perfect, user is also further frequent to the use of lithium battery, more
More to need the lithium battery and charging current of larger capacity.How lithium battery is more rapidly full of to the important need as user
It asks, and the emphasis of current lithium battery industry research and development.
Lithium battery electric core is formed by positive plate, negative electrode tab, membrane winding, and in the prior art, the both ends of negative electrode tab are set respectively
There are tab and the outer tab of cathode in cathode, tab is welded with outer mode of the tab with steel shell Jing Guo spot welding of cathode in the cathode after winding
It is connected together, since failure welding can be generated in welding process, rosin joint, high internal resistance phenomenon is caused, to influence the big electricity of battery
Charge-discharge performance is flowed, and then leads to the reduction of battery production qualification rate, or even impact to security performance.
In order to reduce the internal resistance of lithium battery, reduces the polarization of inside battery, promote its charge-discharge performance, it is general in the prior art
It is to increase the quantity of tab all over the method used.For winding-type lithium battery, pole can be increased by increasing core parallel connection quantity
Ear quantity, but on the one hand this can reduce battery capacity, on the other hand reduce the preparation efficiency of battery.
105355983 A of CN discloses a kind of lithium ion battery cell and lithium ion battery, by positive plate, negative
Multiple anode ears, multiple negative electrode lugs are arranged in sequence on pole piece respectively, and make positive plate multiple anode ears and negative electrode tab it is more
A negative electrode lug forms tab iterative structure or the staggered structure of tab.This method can improve the high rate performance of battery, and
It can be improved the consistency of battery core, be conducive to extend with modularization in groups.But it there is cumbersome, the meta position of multiple tabs
Set the problem of being difficult to control and easily shifting.
Summary of the invention
For the above problem exists in the prior art, the present invention passes through the Nomenclature Composition and Structure of Complexes for improving lithium battery electric core negative electrode tab
And the way of contact of battery core bottom and steel shell, rosin joint is generated when solving battery cathode ear and steel shell welding, causes high internal resistance
The problem of phenomenon.
In the present invention, " the high current battery core " refers to: battery core of the invention is improved using battery made of the battery core
Heavy-current discharge performance.
In order to achieve the above object, the invention adopts the following technical scheme:
In a first aspect, the present invention provides a kind of battery core, especially a kind of power battery core, comprising: negative electrode tab, diaphragm
And positive plate, the negative electrode tab and the positive plate separate and wind to form battery core by the diaphragm；
Wherein, in the deployed state, on negative current collector in addition to the white space reserved along side, it is coated with cathode slurry
Material；And the negative electrode slurry layer that coating zone is formed constitutes negative electrode tab, the negative current collector conduct of white space with negative current collector
Negative electrode lug, i.e. negative electrode tab are integrated in one with negative electrode lug.
The present invention improves the high rate performance of product by the transformation to core strueture, process aspect, and 3C is put
Capacitance conservation rate can be improved 1% or so, meet the needs of large current density, and providing for lithium battery market needs
It asks.
In the present invention, the battery core can be conventional batteries battery core, be also possible to electrical core of power battery.It is more suitable for
18650 battery battery cores are further preferably used as 18650 electrical core of power battery.
Preferably, the negative current collector is copper foil.
As the optimal technical scheme of battery core of the present invention, the white space is rectangle.
Preferably, the white space is in the side of the long side of negative current collector, and the white space is in negative current collector
Width direction on shared ratio be 1:(8~20), such as 1:8,1:9,1:10,1:12,1:13,1:15,1:16,1:17,
1:18 or 1:20 etc., preferably 1:10.
Preferably, the coiling direction is the length direction of negative current collector.
Preferably, after winding, the negative electrode lug exposes to battery core sustained height.
Preferably, the negative electrode lug is located at the bottom of the battery core.
As the optimal technical scheme of battery core of the present invention, the positive plate by plus plate current-collecting body and be formed in it is described just
Anode sizing agent layer on the collector of pole is constituted.
Preferably, the plus plate current-collecting body is aluminium foil.
Preferably, anode ear is connected on the positive plate.
As the further preferred technical solution of battery core of the present invention, the battery core includes negative electrode tab, diaphragm and anode
Piece, the negative electrode tab are separated by the diaphragm with the positive plate and wind to be formed along the length direction of negative current collector copper foil
Battery core；
Wherein, the positive plate is made of plus plate current-collecting body aluminium foil and the anode sizing agent layer being formed on the aluminium foil, institute
It states and is connected with anode ear on positive plate and exposes to battery core；The negative electrode tab is integrated in one with negative electrode lug, and negative electrode lug exposes to
Battery core sustained height；
In the deployed state, it is coated in addition to the rectangle white space along length side on negative current collector copper foil
Negative electrode slurry；And the negative electrode slurry layer that coating zone is formed constitutes negative electrode tab, rectangle white space with negative current collector copper foil
Negative current collector copper foil as negative electrode lug.
Second aspect, the present invention provide a kind of power battery, and the power battery includes battery case and is located at outside battery
Battery core described in first aspect inside shell, and the negative electrode lug of battery core is contacted with outer casing bottom.
Preferably, the battery case is any one in steel shell or aluminum hull.
Power battery of the present invention can be 18650 power batteries, be also possible to other power electrics commonly used in the art
Pond.
In the present invention, the manufacturing process of power battery is not especially limited, those skilled in the art are referred to existing
Method disclosed in technology is manufactured.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention discloses a kind of battery core, especially a kind of power battery core, by the deployed state negative
Pole collector leaves some space region as negative electrode lug along side, and prepares negative electrode tab in remaining position coating negative electrode slurry, then
Negative electrode tab, diaphragm and positive plate are wound into battery core, negative electrode lug after winding can be made to expose to the battery core.Battery core of the invention
Structure novel, negative electrode lug and negative electrode tab are integrated, the stable structure after winding, and the tab without additionally accessing or welding comes
Connection avoids the failure welding as caused by welding process, the problems such as rosin joint and internal resistance are high.
(2) battery is prepared using battery core of the invention, when being assembled into shell, it is only necessary to convey the negative electrode lug of negative electrode tab one (i.e.
The above-mentioned negative current collector for being left white region, for example it is left white the copper foil in region) contact steel shell bottom, avoid soldering polar ear band
The problems such as rosin joint come, further, since the contact area of cathode Yu steel shell metal is increased, without connecting by welding
Metal improves the heavy-current discharge performance of power battery to be effectively improved high internal resistance phenomenon caused by rosin joint, improves production
Qualification rate.
Detailed description of the invention
Fig. 1 is the coating schematic diagram of negative electrode slurry on the negative current collector copper foil before winding, wherein 1 generation in embodiment 1
Coating zone on table negative current collector；2 represent white space namely the corresponding copper foil of white space.
Fig. 2 is the structural schematic diagram of the battery core wound, wherein 2 represent the corresponding copper of white space in embodiment 1
Foil, as negative electrode lug；3 represent anode ear.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
Embodiment 1
A kind of battery core and 18650 power batteries using the battery core are present embodiments provided, the battery core includes: cathode
Piece, diaphragm and positive plate, the negative electrode tab and the positive plate are separated by the diaphragm and wind to form battery core, and feature exists
In:
The negative electrode tab is integrated in one with negative electrode lug；
In the deployed state, negative electrode slurry is coated in addition to the white space reserved along side on negative current collector；And
The negative electrode slurry layer and negative current collector that coating zone is formed constitute negative electrode tab, and the negative current collector of white space is as cathode
Ear.
The preparation of battery core:
(1) negative electrode tab and negative electrode lug are integrated in one:
On negative current collector copper foil in addition to the white space reserved along length side, it is coated with negative electrode slurry (coating
The region for having negative electrode slurry is coating zone), dry, the negative electrode slurry layer and copper foil that coating zone is formed constitute negative electrode tab, empty
The corresponding copper foil of white region is as negative electrode lug；
Wherein, white space ratio shared in the width direction of copper foil is 1:10；
(2) above-mentioned negative electrode tab is separated and is wound by diaphragm with positive plate, form battery core, it is same that negative electrode lug exposes to battery core
One height.
The preparation of 18650 power batteries:
Battery core is put into inside the steel shell of 18650 power batteries, and negative electrode lug is contacted with steel shell bottom, using routine techniques
Assembling obtains 18650 power batteries.
Fig. 1 is the coating schematic diagram of negative electrode slurry on the negative current collector copper foil before winding, wherein 1 generation in the present embodiment
Coating zone on table negative current collector；2 represent white space namely the corresponding copper foil of white space.
Fig. 2 is the structural schematic diagram of the battery core wound, wherein 2 represent the corresponding copper of white space in the present embodiment
Foil, as negative electrode lug；3 represent anode ear.
Embodiment 2
In addition to white space ratio shared in the width direction of copper foil is 1:8, other content is same as Example 1.
Embodiment 3
In addition to white space ratio shared in the width direction of copper foil is 1:20, other content is same as Example 1.
Embodiment 4
In addition to white space ratio shared in the width direction of copper foil is 1:15, other content is same as Example 1.
Embodiment 5
In addition to steel shell is replaced with aluminum hull, other content is same as Example 1.
Comparative example 1
The difference of this comparative example 1 and embodiment 1 is only that following the description:
In lithium battery electric core preparation process, negative electrode slurry is fully coated on negative current collector, the cathode slurry after drying
Material and negative current collector constitute negative electrode tab, and the both ends of negative electrode tab are respectively equipped with the outer tab of tab and cathode in cathode, after winding
Tab welds together with outer mode of the tab with steel shell Jing Guo spot welding of cathode in cathode, due to that can generate welding in welding process
It is bad, rosin joint, high internal resistance phenomenon are caused, to influence the high rate during charging-discharging of battery, and then causes battery production qualified
Rate reduces, or even impacts to security performance.
18650 power batteries of this comparative example 1 are kept relative to the 3C discharge capacity of 18650 power batteries of embodiment 1
Rate has dropped 1% or so.
The Applicant declares that the present invention is explained by the above embodiments method detailed of the invention, but the present invention not office
Be limited to above-mentioned method detailed, that is, do not mean that the invention must rely on the above detailed methods to implement.Technical field
Technical staff it will be clearly understood that any improvement in the present invention, equivalence replacement and auxiliary element to each raw material of product of the present invention
Addition, selection of concrete mode etc., all of which fall within the scope of protection and disclosure of the present invention.
Claims (10)
1. a kind of battery core, comprising: negative electrode tab, diaphragm and positive plate, the negative electrode tab and the positive plate by the diaphragm every
It opens and winds to form battery core, it is characterised in that:
In the deployed state, negative electrode slurry is coated in addition to the white space reserved along side on negative current collector；And it coats
The negative electrode slurry layer and negative current collector that region is formed constitute negative electrode tab, and the negative current collector of white space is as negative electrode lug, i.e.,
Negative electrode tab is integrated in one with negative electrode lug.
2. battery core according to claim 1, which is characterized in that the battery core be 18650 battery battery cores, preferably 18650
Electrical core of power battery.
3. battery core according to claim 1 or 2, which is characterized in that the negative current collector is copper foil.
4. battery core according to claim 1-3, which is characterized in that the white space is rectangle.
5. battery core according to claim 1-4, which is characterized in that length of the white space in negative current collector
The side on side, and white space ratio shared in the width direction of negative current collector is 1:(8~20), preferably 1:10；
Preferably, the coiling direction is the length direction of negative current collector.
6. battery core according to claim 1-5, which is characterized in that after winding, the negative electrode lug exposes to electricity
Core sustained height；
Preferably, the negative electrode lug is located at the bottom of the battery core.
7. battery core according to claim 1-6, which is characterized in that the positive plate is by plus plate current-collecting body and formation
It is constituted in the anode sizing agent layer on the plus plate current-collecting body；
Preferably, the plus plate current-collecting body is aluminium foil.
8. battery core according to claim 1-7, which is characterized in that be connected with anode ear on the positive plate.
9. a kind of power battery, which is characterized in that the power battery includes battery case and is located inside the battery case
Such as the described in any item battery cores of claim 1-8, and the negative electrode lug of battery core is contacted with outer casing bottom.
10. power battery according to claim 9, which is characterized in that the battery case is times in steel shell or aluminum hull
It anticipates one kind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710923326.5A CN109599597A (en) | 2017-09-30 | 2017-09-30 | A kind of high current battery core and the power battery comprising the battery core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710923326.5A CN109599597A (en) | 2017-09-30 | 2017-09-30 | A kind of high current battery core and the power battery comprising the battery core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109599597A true CN109599597A (en) | 2019-04-09 |
Family
ID=65956783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710923326.5A Pending CN109599597A (en) | 2017-09-30 | 2017-09-30 | A kind of high current battery core and the power battery comprising the battery core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109599597A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224109A (en) * | 2019-05-23 | 2019-09-10 | 湖北锂诺新能源科技有限公司 | Anode pole piece, cathode pole piece and battery core and lithium battery and preparation method thereof |
| CN114069113A (en) * | 2021-12-08 | 2022-02-18 | 深圳聚锂能源有限公司 | Button cell and preparation method thereof |
| CN114142105A (en) * | 2021-10-18 | 2022-03-04 | 佛山(华南)新材料研究院 | Winding battery cell, preparation method thereof and winding battery |
| CN114284572A (en) * | 2021-12-31 | 2022-04-05 | 四川启睿克科技有限公司 | Roll up core structure and lithium ion battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953171A (en) * | 2015-06-30 | 2015-09-30 | 深圳市博亿能科技有限公司 | Lithium ion battery |
| CN207302884U (en) * | 2017-09-13 | 2018-05-01 | 东莞凯德新能源有限公司 | A kind of cylinder high-power lithium ion capacitor |
-
2017
- 2017-09-30 CN CN201710923326.5A patent/CN109599597A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953171A (en) * | 2015-06-30 | 2015-09-30 | 深圳市博亿能科技有限公司 | Lithium ion battery |
| CN207302884U (en) * | 2017-09-13 | 2018-05-01 | 东莞凯德新能源有限公司 | A kind of cylinder high-power lithium ion capacitor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224109A (en) * | 2019-05-23 | 2019-09-10 | 湖北锂诺新能源科技有限公司 | Anode pole piece, cathode pole piece and battery core and lithium battery and preparation method thereof |
| CN114142105A (en) * | 2021-10-18 | 2022-03-04 | 佛山(华南)新材料研究院 | Winding battery cell, preparation method thereof and winding battery |
| CN114069113A (en) * | 2021-12-08 | 2022-02-18 | 深圳聚锂能源有限公司 | Button cell and preparation method thereof |
| CN114284572A (en) * | 2021-12-31 | 2022-04-05 | 四川启睿克科技有限公司 | Roll up core structure and lithium ion battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207320232U (en) | A kind of lithium ion battery negative electrode and lithium ion battery | |
| CN207611809U (en) | A kind of anode slice of lithium ion battery and lithium ion battery | |
| CN105655629B (en) | A kind of coiled battery pole piece, takeup type battery core, battery | |
| CN109599597A (en) | A kind of high current battery core and the power battery comprising the battery core | |
| CN100517852C (en) | A coiling lithium ion battery and its making method | |
| CN105355983B (en) | A kind of lithium ion battery cell and lithium ion battery | |
| CN209001017U (en) | Lithium secondary battery anode piece and lithium secondary battery | |
| CN101847745B (en) | Energy-storing device with low internal resistance and production method thereof | |
| CN101562079A (en) | Super-capacitor | |
| CN103531848A (en) | Overlapping winding preparation method of lithium ion secondary battery | |
| CN104218264A (en) | Nickel-hydrogen battery and manufacturing method thereof | |
| CN201556685U (en) | Super capacity cell | |
| CN105406131A (en) | Capacitive type lithium-ion power battery with hybrid negative electrode plates | |
| CN102117931A (en) | High-rate cylindrical lithium ion battery with anode of modified lithium manganese oxide | |
| CN208142290U (en) | A kind of stack type lithium ion battery | |
| CN209418625U (en) | A kind of coiled cylindrical electrodes of lithium-ion batteries structure | |
| CN209298246U (en) | Superbattery and its negative plate | |
| CN207587901U (en) | A kind of high-power laminated lithium ion battery | |
| CN110518186A (en) | A kind of Double-pole lug low internal resistance Li-ion secondary cell | |
| CN110233238A (en) | A kind of lithium battery positive electrode plate and negative electrode plate of lithium ion battery of included tab, battery core and preparation method thereof | |
| CN103390765B (en) | A kind of ferric phosphate lithium cell and preparation method thereof | |
| CN209312934U (en) | A kind of laminated lithium ion battery | |
| CN217507387U (en) | Battery core and battery | |
| CN215644569U (en) | Current collector structure for winding type multi-tab battery cell | |
| CN210224192U (en) | Multi-pole pair cylindrical battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |