CN208690367U - Battery roll core and cylindrical lithium ion battery - Google Patents
Battery roll core and cylindrical lithium ion battery Download PDFInfo
- Publication number
- CN208690367U CN208690367U CN201820971848.2U CN201820971848U CN208690367U CN 208690367 U CN208690367 U CN 208690367U CN 201820971848 U CN201820971848 U CN 201820971848U CN 208690367 U CN208690367 U CN 208690367U
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- Prior art keywords
- tab
- negative electrode
- roll core
- battery
- anode
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims description 34
- 238000000576 coating method Methods 0.000 claims description 34
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 22
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 17
- 229910052782 aluminium Inorganic materials 0.000 claims description 17
- 239000010949 copper Substances 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 13
- 239000004411 aluminium Substances 0.000 claims description 12
- 229910000679 solder Inorganic materials 0.000 claims description 10
- 239000005030 aluminium foil Substances 0.000 claims description 9
- 239000011889 copper foil Substances 0.000 claims description 9
- 210000005069 ears Anatomy 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 abstract description 23
- 238000004804 winding Methods 0.000 description 13
- 239000011888 foil Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003306 harvesting Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229940047545 earoxide Drugs 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- -1 negative lug Chemical compound 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002927 oxygen compounds Chemical class 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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
-
- 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
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model embodiment discloses a kind of battery roll core and cylindrical lithium ion battery, for reducing the internal resistance of cell.The pole piece structure of the utility model embodiment includes pole piece and tab, and the tab is located at the side of the pole piece, and the tab and the pole piece are structure as a whole, and the tab to the pole piece by cutting to obtain.In this way, the utility model embodiment tab and pole piece are structure as a whole, the tab by cutting to obtain to pole piece, thus do not influenced after increasing tab include the core of pole piece height, advantageously reduce the internal resistance of cell.
Description
Technical field
The utility model relates to field of batteries more particularly to a kind of battery roll cores and cylindrical lithium ion battery.
Background technique
Use in order to facilitate user to electronic equipment, and the portability of electronic equipment is improved, need the cooperation of battery.
Wherein, in lithium battery market, cylindrical battery is industrialization and the highest product of the degree of automation.
Existing cylindrical steel shell lithium ion battery multiplying power and safety issue are always than polymer battery, aluminum hull power battery
Want poor, for example, cylindrical battery multiplying power discharging accomplishes continued electric discharge 30C mostly, if improving discharge-rate, can not effectively discharge or
There are problems that battery life deficiency.And internal resistance of cylindrical battery is influenced also by structure and prior art than polymer, aluminum hull power
Battery is high.
Utility model content
In view of the above technical problems, the utility model embodiment provides a kind of battery roll core and cylindrical lithium ion battery,
For reducing the internal resistance of cell.
The first aspect of the utility model embodiment provides a kind of pole piece structure of battery, comprising:
Pole piece and tab, the tab are located at the side of the pole piece, and the tab and the pole piece are structure as a whole, institute
Tab is stated by cutting to obtain to the pole piece.
Optionally, the tab is coated with oxide coating in the side surface close to the pole piece, and the pole piece is leaning on
One side surface of the nearly tab is coated with oxide coating.
Optionally, the quantity of the tab is multiple, and the same side of the pole piece is arranged in multiple tabs.
The second aspect of the utility model embodiment provides a kind of battery roll core, comprising:
Positive plate；
It is located at the anode ear of the positive plate side, the anode ear and the positive plate are structure as a whole, the anode
Ear to the positive plate by cutting to obtain；
Negative electrode tab；
It is located at the negative electrode lug of the negative electrode tab side, the negative electrode lug and the negative electrode tab are structure as a whole, the cathode
Ear to the negative electrode tab by cutting to obtain；
Diaphragm, the diaphragm is between the positive plate and the negative electrode tab.
Optionally, the battery roll core further includes positive band and cathode band；
The anode band and the anode ear turn weldering connection, and the anode band is for being connected to lid for the battery roll core
Cap；
The cathode band and the negative electrode lug turn weldering connection, and the cathode band is used to the battery roll core being connected to battery
Shell.
Optionally, the positive plate, the anode ear and the anode are with made of aluminum；
The negative electrode tab, the negative electrode lug and the cathode band are made of copper.
Optionally, the quantity of the anode ear is multiple, and multiple anode ears are located at same straight line on the battery roll core,
The multiple anode ear and the anode band turn weldering connection；
Optionally, the quantity of the negative electrode lug is multiple, and multiple negative electrode lugs are located at same straight line on the battery roll core,
The multiple negative electrode lug and the cathode band turn weldering connection.
Optionally, the anode ear is coated with oxide coating, the anode in the side surface close to the positive plate
Piece is coated with oxide coating in the side surface close to the anode ear.
The third aspect of the utility model embodiment provides a kind of cylindrical lithium ion battery, including battery roll core, described
Battery roll core is battery roll core described in second aspect as above.
In technical solution provided by the embodiment of the utility model, the pole piece structure of battery includes pole piece and tab, the tab
It is located at the side of pole piece, tab and pole piece are structure as a whole, and tab to pole piece by cutting to obtain.Therefore compared with the existing technology,
The utility model embodiment tab and pole piece are structure as a whole, and the tab to pole piece by cutting to obtain, thus after increasing tab not
The height for influencing the core including pole piece, advantageously reduces the internal resistance of cell.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the pole piece structure for battery that an embodiment of the present invention provides；
Fig. 2 is a kind of structural schematic diagram for battery roll core that another embodiment of the utility model provides；
Fig. 3 is a kind of flow chart for battery roll core production method that another embodiment of the utility model provides；
Fig. 4 is the structural schematic diagram of pole piece before a kind of cross cutting that embodiment illustrated in fig. 3 is related to.
Wherein, 11, pole piece structure；12, pole piece；13, tab；2, oxide coating；3, battery roll core；41, positive plate；
42, anode ear；43, positive band；44, the first switching solder joint；51, negative electrode tab；52, negative electrode lug；53, cathode band；54, the second switching
Solder joint；6, diaphragm；7, the normal coating area of pole piece.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those skilled in the art are obtained without creative efforts
The every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1 is a kind of structural schematic diagram of the pole piece structure 11 of battery provided by the embodiment of the utility model.With reference to Fig. 1,
The pole piece structure 11 of the battery of the utility model embodiment includes pole piece 12 and tab 13, and tab 13 is located at the side of pole piece 12,
Tab 13 and pole piece 12 are structure as a whole, and tab 13 is by obtaining the cutting of pole piece 12.In other words, the side of pole piece 12 is cut
Operation is cut, to be cut into tab 13, the tab 13 and pole piece 12 are to be structure as a whole.Because tab 13 is by cutting pole piece 12
It cuts to obtain, the width of tab 13 is less than the width of pole piece 12.Wherein, specific cutting mode include but is not limited to be cut by laser,
Cutter cutting etc..
Wherein, which can be foil, cut the foil pole piece 12 and obtain tab 13, in this way can be without using existing
The modes such as traditional welding aluminium strip, nickel strap or copper strips.To the tab 13 obtained by cutting pole piece 12, even if increasing tab
13 quantity do not increase by 3 whole height of battery roll core yet.Wherein, which includes pole piece 12 and diaphragm 6, battery roll core 3
Whole height be pole piece 12 and diaphragm 6 height.
Optionally, in the utility model embodiment, the quantity of tab 13 can be it is multiple, multiple setting of tab 13 exists
The same side of pole piece 12.In this way, the internal resistance of cell can be even lower after increasing by 13 quantity of tab.
Optionally, tab 13 is coated with oxide coating 2 in the side surface close to pole piece 12, and pole piece 12 is leaning on proximal pole
One side surface of ear 13 is coated with oxide coating 2.
As shown in Figure 1, the first oxide coating 2 is the oxide coating 2 on tab 13, the second oxide coating 2 is pole
Oxide coating 2 on piece 12.Oxide coating 2 is coated by the surface in 13 root of tab, can avoid after winding cross cutting
Tab 13 is jagged, and the risk for avoiding burr from puncturing diaphragm 6, to play the role of safeguard protection to battery roll core 3.Pass through
Oxide coating 2 is coated on the surface of 13 side of close tab of pole piece 12, battery security can be promoted, avoid being cut into tab
Burr punctures diaphragm 6 when 13, in addition, oxide coating 2 also acts as insulating effect.
It is appreciated that the first oxide coating 2 and the second oxide coating 2 can when pole piece 12 and tab 13 are aluminium
For aluminum oxide coating layer.
In the utility model embodiment, pole piece 12 and 13 partial region of tab are coated with oxide coating 2, in pole piece 12
On further include the normal coating area 7 of pole piece, as shown in Figure 1.
The pole piece structure it is appreciated that pole piece structure 11 shown in FIG. 1 can be positive, or negative plate structure.In tab
13 and pole piece be coated in the embodiment of oxide coating 2, which can be positive pole piece structure.
The pole piece structure 11 of the battery of the utility model embodiment, can be applied on battery, especially cylindrical steel shell lithium from
Sub- battery.The concrete application of the pole piece structure 11 of battery shown in FIG. 1 is described below.
Fig. 2 is a kind of structural schematic diagram of battery roll core 3 provided by the embodiment of the utility model, battery winding shown in Fig. 2
Core 3 can apply pole piece structure 11 shown in FIG. 1.
As shown in Fig. 2, the battery roll core 3 includes positive plate 41, negative electrode tab 51 and diaphragm 6, and it is located at positive plate 41 1
The anode ear 42 of side, the negative electrode lug 52 for being located at 51 side of negative electrode tab.
Wherein, anode ear 42 is located at 41 side of positive plate, and anode ear 42 and positive plate 41 are structure as a whole, anode ear 42 by
The cutting of positive plate 41 is obtained.The specific implementation of anode ear 42 and positive plate 41 sees pole piece structure 11 shown in FIG. 1
Specific descriptions.
Optionally, anode ear 42 is coated with oxide coating 2 in the side surface close to positive plate 41, and positive plate 41 is leaning on
One side surface of nearly anode ear 42 is coated with oxide coating 2, and specific implementation sees specifically retouching for embodiment illustrated in fig. 1
It states.If, by coating oxide coating 2, avoiding the risk that pole piece punctures diaphragm 6 in this way, tab generates burr after cross cutting, rising
It is acted on to tab safeguard protection.
Negative electrode lug 52 is located at 51 side of negative electrode tab, and negative electrode lug 52 and negative electrode tab 51 are structure as a whole, and negative electrode lug 52 is by negative
The cutting of pole piece 51 obtains.The specific implementation of negative electrode lug 52 and negative electrode tab 51 sees the tool of pole piece structure 11 shown in FIG. 1
Body description.
In the utility model embodiment, diaphragm 6 is between positive plate 41 and negative electrode tab 51.
Optionally, which further includes positive band 43 and cathode band 53.Wherein, positive band 43 and 42 turns of anode ear
Weldering connection, positive band 43 are used to battery roll core 3 being connected to nut cap.The 52 turns of weldering connections of cathode band 53 and negative electrode lug, cathode band 53
For battery roll core 3 to be connected to battery case.Wherein, the weldering connection that turns of pole band and tab can be real with ultrasonic wave or laser welding
It is existing.After pole band and tab turn weldering connection, switching solder joint, namely the crator solder joint of welding can be formed between pole band and tab.
Optionally, positive plate 41, anode ear 42 and positive band 43 are made of aluminum, negative electrode tab 51, negative electrode lug 52 and cathode band
53 are made of copper.
For example, positive plate 41 is made of aluminium foil, positive active material, positive pole ear and aluminium oxide, negative electrode tab 51 is by copper
Foil, negative electrode active material, negative lug, aluminium oxide composition.
For example, positive band 43 is aluminium strip, which is connected to core in nut cap, if foil tab directly welds, then may be used
The conductive effect for turning weldering aluminium strip is not achieved in energy conductive effect.Aluminium strip and anode ear 42 can turn weldering by ultrasonic wave, turn postwelding, in aluminium
The first switching solder joint 44 is formed between foil tab and aluminium strip.The first switching solder joint 44 connects aluminium foil tab and aluminium strip, consequently facilitating
The Assembling Production of process afterwards.The anode ear 42 is aluminium foil, and anode ear 42 directly leads out aluminium foil tab.
Cathode band 53 is copper strips, which is connected to core on shell, avoids bit copper foil burn-through, foil tab directly welds
When conductive effect the conductive effect for turning bit copper band is not achieved.Copper strips and negative electrode lug 52 can turn weldering by ultrasonic wave, turn postwelding, in copper
The second switching solder joint 54 is formed between foil tab and copper strips.The second switching 54 connection copper foil tab of solder joint and copper strips, are convenient for rear work
The Assembling Production of sequence.The negative electrode lug 52 is copper foil, and negative electrode lug 52 directly leads out copper foil tab.
In the utility model embodiment, increase the quantity of anode ear 42 and/or negative electrode lug 52, but does not increase core height
Degree, to reduce the internal resistance of cell, improves battery conductive.
Thus optionally, as shown in Fig. 2, the quantity of anode ear 42 be it is multiple, multiple anode ear 42 is in battery roll core 3
It is upper to be located at same straight line, the 43 turns of weldering connections of multiple anode ear 42 and positive band, specially multiple anode ears 42 and an anode
43 turns of weldering connections of band.The quantity of negative electrode lug 52 be it is multiple, multiple negative electrode lug 52 on battery roll core 3 be located at same straight line, should
The 53 turns of weldering connections of multiple negative electrode lugs 52 and cathode band.The 53 turns of weldering connections of specially multiple negative electrode lugs 52 and a cathode band.
In the utility model embodiment, diaphragm 6, positive plate 41 and negative electrode tab 51 constitute core component.
The battery roll core 3 of the utility model embodiment can be applied on cylindrical lithium ion battery, can promote battery charging and discharging
Multiplying power reduces internal resistance and promotes battery security.
The battery roll core 3 of the utility model embodiment increases after tab not influence core height after winding, out tab side
Formula is directly cut out with foil.Several foil tabs are cut out using laser or cross cutting mode to tab foil, change positive/negative
The tab tapping form of piece 51.At this point, increasing the internal resistance of cell after tab quantity reduces, for example, 18650 cylindrical battery positive/negative plates
After 51 are respectively arranged three tabs, internal resistance can accomplish 5m Ω or so.Battery pole ear increases, and internal resistance reduces, thus battery charging and discharging
Multiplying power gets a promotion.
In addition, the cathode ear of cylinder battery 52 of existing continuous coating scraper soldering polar ear technique scrapes a position and welds tab
After adhesive fabric, analysis lithium problem is faced, there are certain security risks.And the battery roll core 3 of the utility model embodiment, due to cathode
It is also to be drawn with foil as tab, so not depositing scraper stickie problems, avoids battery analysis lithium security risk.
The utility model embodiment additionally provides a kind of cylindrical lithium ion battery, which includes battery winding
Core 3, the battery roll core 3 are that the battery roll core 3 of embodiment as shown in Figure 2 is seen about the particular content of the battery roll core 3
Embodiment shown in Fig. 2.
The structure of pole piece structure 11 and battery roll core 3 has been described above.Hereafter i.e. to the pole piece structure of battery shown in FIG. 1
11 and the production method of battery roll core shown in Fig. 23 be introduced.
Fig. 3 is a kind of flow chart of 3 production method of battery roll core provided by the embodiment of the utility model, side shown in Fig. 3
Method can be used for making pole piece structure 11 and battery roll core shown in Fig. 23 shown in FIG. 1.
Refering to Fig. 3, the production method of the battery roll core 3 of the utility model embodiment includes:
Step 301: anode ear being cut into positive plate on slicer.
Wherein, the anode ear 42 being cut into is located at 41 side of positive plate.
Specifically, the rouleau pole piece after staff takes anode to cut, for example, as shown in figure 4, being somebody's turn to do in length direction
It is 9mm that the coating of pole piece, which goes to the region that oxide is coated for 54mm, be the region of sky aluminium is 7mm.Staff is by the positive plate
To on laser automatic clinical microtome on 41.
Then, start laser automatic clinical microtome, and open laser and cut mould function.Laser automatic clinical microtome presses involute formula
It calculates the size of tab position and is sliced, anode ear 42 is cut into positive plate 41.The tab width being cut into is default
Value, such as width are 4mm.
The structure for executing the positive plate 41 that step 301 obtains sees the specific descriptions of embodiment shown in FIG. 1.
It in some embodiments, can be to the pole piece after cutting after being cut into anode ear 42 to positive plate 41 on slicer
In ending mechanism harvest rouleau coiled strip.
Step 302: negative electrode lug being cut into negative electrode tab on slicer.
Wherein, the negative electrode lug 52 being cut into is located at 51 side of negative electrode tab.
Specifically, staff is on another laser slicing machine, and after cathode rouleau pole piece is carried out feeding, starting swashs
Light slicer, so that laser slicing machine carries out laser dicing by involute formula combination physical location size.It is small about the cathode
Rolling up pole piece can be 60mm, foil 10mm for dispensing area in the longitudinal direction.
The structure for executing the negative electrode tab 51 that step 302 obtains sees the specific descriptions of embodiment shown in FIG. 1.
It in some embodiments, can be to the pole piece after cutting after being cut into negative electrode lug 52 to negative electrode tab 51 on slicer
In ending mechanism harvest rouleau coiled strip.
In the utility model embodiment, involute formula can be used to be calculated for the cutting of positive and negative tab 52.Wherein gradually
Burst at the seams formula basic circle radius if r, establish coordinate system by origin of the basic circle center of circle, then can obtain the parametric equation of involute,
It is as follows:
In the parametric equation of involute,For fixed point and the angle between circle center line connecting and X-axis.
Step 303: to the positive plate for being equipped with anode ear and the negative electrode tab equipped with negative electrode lug assembles diaphragm.
Anode ear 42 is cut into positive plate 41 on slicer, and on slicer negative electrode tab 51 is cut into negative
After tab 52, to the positive plate 41 for being equipped with anode ear 42 and the negative electrode tab 51 equipped with negative electrode lug 52 assembles diaphragm 6, obtains core
Component specifically can be the assembly diaphragm 6 between positive plate 41 and negative electrode tab 51.
Step 304: on winding apparatus, by the positive plate for being equipped with anode ear, the negative electrode tab equipped with negative electrode lug and having assembled
At diaphragm be rolled into battery roll core.
To the positive plate 41 for being equipped with anode ear 42 and the negative electrode tab 51 equipped with negative electrode lug 52 assembles diaphragm 6, obtains core group
After part, which can be rolled into battery roll core 3.In other words, on winding apparatus, the positive plate of anode ear 42 will be equipped with
41, the diaphragm 6 that the negative electrode tab 51 equipped with negative electrode lug 52 and assembly are completed is rolled into battery roll core 3.
For example, by winding apparatus is expected on positive and negative anodes rouleau pole piece that laser is cut, to the assembly of positive and negative anodes rouleau pole piece every
After the completion of film 6, start winding apparatus.Positive/negative plate 51 can be rolled into core by winding apparatus.
Step 305: turning anode band to be soldered to anode ear.
Wherein, positive band 43 is used to battery roll core 3 being connected to nut cap.
Under core after winding apparatus, into turning welding electrode ear process, anode ear 42 is soldered to by 43 turns of positive band, such as by aluminium foil
The upper aluminium strip of tab switching.
Step 306: cathode band being turned to be soldered to negative electrode lug.
Wherein, cathode band 53 is used to battery roll core 3 being connected to battery case.
Anode ear 42 is carried out to turn weldering, also needs that negative electrode lug 52 is carried out to turn weldering, i.e., is soldered to negative electrode lug 52 for 53 turns of cathode band.
Such as copper foil tab is transferred on upper copper strips.
In specific example, step 305 and step 306 can be automatically performed by process equipment.
The core that tab turns to weld pole band can go to assembly line to carry out next step processing.
Optionally, the battery roll core 3 of the utility model embodiment may include multiple tabs, to further decrease in battery
Resistance.For this purpose, step 301 specifically includes: being cut into multiple anode ears 42 to positive plate 41 on slicer.And step 302 tool
Body includes being cut into multiple negative electrode lugs 52 to negative electrode tab 51 on slicer.
At this point, in step 304, it is multiple on battery roll core 3 for the battery roll core 3 being rolled on winding apparatus
Anode ear 42 is located at same straight line, and multiple negative electrode lug 52 is located at same straight line.And anode ear 42 and negative electrode lug 52 can be located at together
One straight line can not also be located at same straight line.In other words, it when positive/negative plate 51 is rolled into core by winding apparatus, needs to guarantee anode
The arrangement of ear 42 overlapping is on one wire and the arrangement of negative electrode lug 52 is overlapped on one wire.As positive/negative tab 52 does not arrange overlapping
On one wire, then it needs to adjust Feed size to winding apparatus, so that the arrangement of positive/negative tab 52 overlapping is on one wire.
Optionally, the part of the surface of positive plate 41 is coated with oxide coating 2, and oxide coating 2 is close to positive plate 41
One end, as shown in Figure 4.At this point, being specifically included the step of being cut into anode ear 42 to positive plate 41 on slicer: in slicer
On, anode ear 42 is cut into positive plate 41 along oxide coating 2, so that anode ear 42 is in the side surface close to positive plate 41
Coated with oxide coating 2, positive plate 41 is coated with oxide coating 2 in the side surface close to anode ear 42.Wherein, the oxygen
Compound coating 2 can be aluminum oxide coating layer, and anode ear 42 and positive plate 41 are aluminium foil material.
In some embodiments, negative electrode tab 51 can not have to apply oxide, to reduce cost.
The production method of battery roll core 3 shown in Fig. 3,3 battery pole ear of battery roll core produced increase, and internal resistance reduces,
Battery charging and discharging multiplying power gets a promotion after internal resistance reduces.It is drawn due to cathode and with foil as tab, so not depositing scraper
Stickie problems avoid battery analysis lithium security risk.To promote battery consistency and safety.
In conclusion the pole piece structure of battery includes pole piece and tab, which is located at the side of pole piece, tab and pole piece
It is structure as a whole, tab to pole piece by cutting to obtain.Therefore compared with the existing technology, the utility model embodiment tab and pole piece
Be structure as a whole, the tab by cutting to obtain to pole piece, thus do not influenced after increasing tab include the core of pole piece height, have
Conducive to the reduction internal resistance of cell.
Above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although referring to aforementioned reality
Example is applied the utility model is described in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and model of various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (5)
1. a kind of battery roll core characterized by comprising
Positive plate；
Be located at the anode ear of the positive plate side, the anode ear and the positive plate are structure as a whole, the anode ear by
The positive plate is cut to obtain；
Negative electrode tab；
Be located at the negative electrode lug of the negative electrode tab side, the negative electrode lug and the negative electrode tab are structure as a whole, the negative electrode lug by
The negative electrode tab is cut to obtain；
Diaphragm, the diaphragm is between the positive plate and the negative electrode tab；
Wherein, the battery roll core further includes positive band and cathode band；
The anode band and the anode ear turn weldering connection, and the anode band is for being connected to nut cap for the battery roll core；
The cathode band and the negative electrode lug turn weldering connection, and the cathode band is used to the battery roll core being connected to battery case
Body；
The positive plate, the anode ear and the anode are with made of aluminum；
The negative electrode tab, the negative electrode lug and the cathode band are made of copper；
The anode band is aluminium strip, and the anode ear is aluminium foil, and the anode ear directly leads out aluminium foil tab, the first switching solder joint
Connect the aluminium foil tab and the aluminium strip；
The cathode band is copper strips, and the negative electrode lug is copper foil, and the negative electrode lug directly leads out copper foil tab, the second switching solder joint
Connect the copper foil tab and the copper strips.
2. battery roll core according to claim 1, which is characterized in that
The quantity of the anode ear be it is multiple, multiple anode ears on the battery roll core be located at same straight line, it is the multiple just
Tab and the anode band turn weldering connection.
3. battery roll core according to claim 1, which is characterized in that
The quantity of the negative electrode lug be it is multiple, multiple negative electrode lugs are located at same straight line on the battery roll core, the multiple negative
Tab and the cathode band turn weldering connection.
4. battery roll core according to claim 1-3, which is characterized in that
The anode ear is coated with oxide coating in the side surface close to the positive plate, and the positive plate is close to described
One side surface of anode ear is coated with oxide coating.
5. a kind of cylindrical lithium ion battery, which is characterized in that including battery roll core, the battery roll core is appointed for claim 1-4
Battery roll core described in one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820971848.2U CN208690367U (en) | 2018-06-23 | 2018-06-23 | Battery roll core and cylindrical lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820971848.2U CN208690367U (en) | 2018-06-23 | 2018-06-23 | Battery roll core and cylindrical lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208690367U true CN208690367U (en) | 2019-04-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108963175A (en) * | 2018-06-23 | 2018-12-07 | 深圳市创景新能源科技有限公司 | The production method of the pole piece structure of battery, battery roll core and battery roll core |
| WO2021237711A1 (en) * | 2020-05-29 | 2021-12-02 | 宁德新能源科技有限公司 | Battery and electrical device having same |
-
2018
- 2018-06-23 CN CN201820971848.2U patent/CN208690367U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108963175A (en) * | 2018-06-23 | 2018-12-07 | 深圳市创景新能源科技有限公司 | The production method of the pole piece structure of battery, battery roll core and battery roll core |
| WO2021237711A1 (en) * | 2020-05-29 | 2021-12-02 | 宁德新能源科技有限公司 | Battery and electrical device having same |
| CN115413384A (en) * | 2020-05-29 | 2022-11-29 | 宁德新能源科技有限公司 | Battery and electric device with same |
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