CN209641733U - It is a kind of for protecting the pole piece structure of diaphragm - Google Patents
It is a kind of for protecting the pole piece structure of diaphragm Download PDFInfo
- Publication number
- CN209641733U CN209641733U CN201920373428.9U CN201920373428U CN209641733U CN 209641733 U CN209641733 U CN 209641733U CN 201920373428 U CN201920373428 U CN 201920373428U CN 209641733 U CN209641733 U CN 209641733U
- Authority
- CN
- China
- Prior art keywords
- pole piece
- protection band
- diaphragm
- protecting
- tab
- 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.)
- Expired - Fee Related
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Classifications
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- 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
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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model belongs to the technical field of battery core assembly; more particularly to a kind of for protecting the pole piece structure of diaphragm; including pole piece (1); the pole piece (1) is provided with coating area (11) and uncoated area (12); the uncoated area (12) is cut into several equidistant tabs (121); the both ends of the coating area (11) are respectively and fixedly provided with protection band (2), and the protection band (2) is for coating the region that the uncoated area (12) extends to the tab (121).The utility model design simple and easy to removal and installation using structure can prevent burr or bead on pole piece from piercing through diaphragm, the safety inside battery core be helped to improve, to improve the quality of battery after pole piece is cut into tab.
Description
Technical field
The utility model belongs to the technical field of battery core assembly, and in particular to a kind of for protecting the pole piece structure of diaphragm.
Background technique
Nowadays, along with the arriving of information-based cyberage, energy source use form is changing, renewable, nothing
Pollution, small-sized discrete removable high-performance power supply demand rapid growth.Each state is all greatly developing green, high efficient secondary electricity
Pond.Lithium ion battery as a kind of new secondary battery, have energy density and power density are big, operating voltage is high, it is light-weight,
It is small in size, have extended cycle life, the advantages that safety is good, environmentally protective, in portable electronics, electric tool, large-scale energy storage, electronic
Traffic electrical source of power etc. has broad application prospects.When pursuing high-energy density, designers' usually nationwide examination for graduation qualification
Consider using than relatively thin isolation film.However, in the actual production of lithium ion battery, usually because the cutting of pole piece and generate gold
Belong to burr and easily cause battery short circuit when metal burr penetrates isolation film, so that self discharge be brought to accelerate or even burn, is quick-fried
The safety problems such as fried.
Wherein, Chinese patent literature discloses a kind of deburring equipment (publication number: CN of electrodes of lithium-ion batteries
102350454 A), comprising: fixed part, support frame, and the pressing roll mechanism set on support frame two sides, the fixed part setting
At the both ends of support frame, the pressing roll mechanism includes pressure roller and roller frame, and pressure roller is fixedly mounted on roller frame, the pressure roller
It is greater than the cylinder of mid diameter for both ends diameter, pressure roller is for rolling the pole piece edge after slitting, after rolling slitting
Pole piece when, thickness conversion camber line region correspond to pole piece edge, the support frame includes main shaft, casing and locating rod, institute
The casing stated is slidably sleeved on main shaft, and one end of locating rod is perpendicularly fixed on casing, the other end and the pressure roller
Frame connection.Above-mentioned scheme can remove flash removed to a certain degree, but at least there is also following defects for this scheme: first, knot
Structure is complicated and not easy to disassemble and installs, second, and during cutting tab, generating burr or bead can not all be removed, and still has
Pierce through the risk of diaphragm.
Utility model content
The purpose of this utility model is that: in view of the deficiencies of the prior art, provide a kind of for protecting the pole piece knot of diaphragm
Structure, the design simple and easy to removal and installation using structure can prevent the burr on pole piece after pole piece is cut into tab
Or bead pierces through diaphragm, the safety inside battery core is helped to improve, to improve the quality of battery.
To achieve the goals above, the utility model adopts the following technical solution:
It is a kind of for protecting the pole piece structure of diaphragm, including pole piece, the pole piece is provided with coating area and uncoated area, institute
It states uncoated area and is cut into several equidistant tabs, the both ends of the coating area are respectively and fixedly provided with protection band, and the protection band is used
The region of the tab is extended in the cladding uncoated area.
As a kind of a kind of improvement of the pole piece structure for protecting diaphragm described in the utility model, the protection band
Width is greater than or equal to the width that the uncoated area extends to the region of the tab.
As a kind of a kind of improvement of the pole piece structure for protecting diaphragm described in the utility model, the protection band
With a thickness of 0.1um-150um.
As a kind of a kind of improvement of the pole piece structure for protecting diaphragm described in the utility model, the protection band
With a thickness of 90um-120um.
As a kind of a kind of improvement of the pole piece structure for protecting diaphragm described in the utility model, the protection band
Width is 0.1mm-5mm.
As a kind of a kind of improvement of the pole piece structure for protecting diaphragm described in the utility model, the protection band
Width is 2mm-4mm.
As a kind of a kind of improvement of the pole piece structure for protecting diaphragm described in the utility model, the protection band is solid
Mode is determined for coining, silk-screen or stickup.
As a kind of a kind of improvement of the pole piece structure for protecting diaphragm described in the utility model, the protection band is
One of the PET gummed paper of electrolyte resistance, PP gummed paper, PC gummed paper, PVC gummed paper.
As a kind of a kind of improvement of the pole piece structure for protecting diaphragm described in the utility model, the protection band
Quantity is at least two.
As a kind of a kind of improvement of the pole piece structure for protecting diaphragm described in the utility model, the cross of the tab
The calculation formula of sectional area are as follows: S2=I2 ρ t/C* ω * Δ T, wherein S is the cross-sectional area of tab；I is the electricity by tab
Stream；ρ is tab resistivity；T is conduction time；ω is tab density, and C is constant；Δ T is tab temperature.
The beneficial effects of the utility model are that the utility model includes pole piece, and the pole piece is provided with coating area and not
Coating area, the uncoated area are cut into several equidistant tabs, and the both ends of the coating area are respectively and fixedly provided with protection band, described
Protection band is for coating the region that the uncoated area extends to the tab.The coating area of pole piece coats active material, and pre-
Uncoated area is reserved, convenient for being cut into tab in uncoated area, tab the thickness uniformity is solved the problems, such as, also helps reduction
Battery production cost, improves the stability of battery, simultaneously as cutting equipment amplitude, frequency and defocus at the case where avoiding rosin joint
The unstable of amount has energy variation when so that cutting, and burr or bead are easy to produce after being cut into tab, on pole piece, leads to electricity
Pond diaphragm is punctured by burr or bead, reduces the safety of inside battery, therefore insulate to cutting region using protection band
Protection, prevents battery diaphragm from being punctured by burr or bead；Meanwhile protection band can enhance the insulation performance of pole piece, prevent positive plate
It is contacted with negative electrode tab, causes short circuit；Protection band is fixed on to the both ends of coating area, is convenient for mechanized operation, simplifies peace
Process is filled, production efficiency is helped to improve.The utility model design simple and easy to removal and installation using structure, Neng Gou
After pole piece is cut into tab, prevents burr or bead on pole piece from piercing through diaphragm, help to improve the safety inside battery core, from
And improve the quality of battery.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram before the pole piece cutting of the utility model.
Fig. 3 is the structural schematic diagram after the pole piece cutting of the utility model.
Wherein: 1- pole piece；2- protection band；The coating area 11-；The uncoated area 12-；121- tab.
Specific embodiment
As used some vocabulary to censure specific components in the specification and claims.Those skilled in the art answer
It is understood that hardware manufacturer may call the same component with different nouns.This specification and claims are not with name
The difference of title is as the mode for distinguishing component, but with the difference of component functionally as the criterion of differentiation.Such as logical
The "comprising" of piece specification and claim mentioned in is an open language, therefore should be construed to " include but do not limit
In "." substantially " refer within an acceptable error range, those skilled in the art can solve technology within a certain error range
Problem basically reaches technical effect.
In the description of the present invention, it should be understood that term " on ", "lower", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as level " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description originally
Utility model and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore should not be understood as limiting the present invention.
In utility model unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation "
Equal terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be with
It is mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
Connection inside a element.For the ordinary skill in the art, it can understand that above-mentioned term exists as the case may be
Concrete meaning in the utility model.
The utility model is described in further detail below in conjunction with attached drawing, but not as the restriction to the utility model.
Embodiment 1
As shown in Figure 1-3, a kind of for protecting the pole piece structure of diaphragm, including pole piece 1, pole piece 1 is provided with coating area 11
With uncoated area 12, uncoated area 12 is cut into several equidistant tabs 121, and the both ends of coating area 11 are respectively and fixedly provided with protection band
2, protection band 2 is for coating the region that uncoated area 12 extends to tab 121.The coating area 11 of pole piece 1 coats active material, and
Uncoated area 12 is reserved, convenient for being cut into tab 121 in uncoated area 12, solves the problems, such as 121 the thickness uniformity of tab,
The case where also helping reduces battery production cost, avoids rosin joint, improves the stability of battery, simultaneously as cutting equipment shakes
Width, frequency and the unstable of defocusing amount have energy variation when so that cutting, and after being cut into tab 121, are easy to produce on pole piece 1
Burr or bead, cause battery diaphragm to be punctured by burr or bead, reduce the safety of inside battery, therefore use protection band 2
Insulation protection is carried out to cutting region, prevents battery diaphragm from being punctured by burr or bead；Meanwhile protection band 2 can enhance pole piece 1
Insulation performance prevents positive plate and negative electrode tab from contacting, causes short circuit；Protection band 2 is fixed on to the both ends of coating area 11, convenient for into
Row mechanized operation, simplifies installation procedure, helps to improve production efficiency.
Preferably, the width of protection band 2 is greater than or equal to the width that uncoated area 12 extends to the region of tab 121.It protects
The width of protecting band 2 is larger, can not only improve the stability of protection band 2, moreover it is possible to prevent the active material of part coating area 11 from remaining
In uncoated area 12, the risk of internal short-circuit of battery is reduced, while playing and uncoated area 12 is protected to extend to tab 121 comprehensively
Region.
Preferably, protection band 2 with a thickness of 0.1um-150um.The thickness for limiting protection band 2, prevents protection band 2 excessively thin,
It is easy to be punctured by burr or bead；Meanwhile preventing protection band 2 blocked up, increase the cost of protection band 2, and increase pole piece 1 and wind
Whole height afterwards is unfavorable for improving the space utilization rate inside battery core.
Preferably, the width of protection band 2 is 0.1mm-5mm.The width for limiting protection band 2, prevents protection band 2 narrow, nothing
Method covers the burr or bead on pole piece 1, and diaphragm is caused to be punctured；Meanwhile prevent protection band 2 wide, increase protection band 2 at
This, is unfavorable for the progress of the chemical reaction of inside battery.
Preferably, 2 fixed form of protection band is coining, silk-screen or stickup.According to cost and practical application scene, using pressure
Protection band 2 is fixed on pole piece 1 by print, silk-screen or stickup.
Preferably, protection band 2 is one of the PET gummed paper of electrolyte resistance, PP gummed paper, PC gummed paper, PVC gummed paper.Selection
PET gummed paper, PP gummed paper, PC gummed paper, PVC gummed paper, the reason is that PET gummed paper, PP gummed paper, PC gummed paper, PVC gummed paper all have it is excellent
Tensile strength and adhesive strength, while also there is good electrolyte resistance performance, therefore use PET gummed paper, PP gummed paper, PC glue
One of paper, PVC gummed paper are used as protection band 2.
Preferably, the quantity of protection band 2 is at least two.According to the size of the needs of actual battery or burr, bead, choosing
At least two protection bands 2 are selected, achieve the purpose that smooth cladding burr or bead.
Preferably, the calculation formula of the cross-sectional area of tab 121 are as follows: wherein, S is tab to S2=I2 ρ t/C* ω * Δ T
Cross-sectional area；I is the electric current by tab；ρ is tab resistivity；T is conduction time；ω is tab density, and C is constant；ΔT
For tab temperature.
The working principle of the utility model is:
Active material is coated on coating area 11, after active material drying, is cut into anode ear in uncoated area 12
121, then, that is, when in use burr or bead are prevented using the region that the cladding of protection band 2 coating area 11 extends to tab 121
Diaphragm is pierced through, battery core internal short-circuit is caused.
Embodiment 2
Unlike the first embodiment: the protection band 2 of the present embodiment with a thickness of 90um-120um, the width of protection band 2 is
2mm-4mm.The thickness for further limiting protection band 2 meets the needs of reducing by 2 cost of protection band, moreover it is possible to protection band 2 be prevented to be easy
It is punctured by burr or bead；The width for further limiting protection band 2 meets the needs of reducing by 2 cost of protection band, moreover it is possible to cover pole
Burr or bead on piece 1, prevent diaphragm to be punctured.
Other structures are same as Example 1, and which is not described herein again.
According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and is modified.Therefore, the utility model is not limited to above-mentioned specific embodiment, all this field skills
It is practical new that art personnel any conspicuous improvement made on the basis of the utility model, replacement or modification belong to this
The protection scope of type.In addition, these terms are intended merely to facilitate although using some specific terms in this specification
It is bright, any restrictions are not constituted to the utility model.
Claims (10)
1. a kind of for protecting the pole piece structure of diaphragm, it is characterised in that: including pole piece (1), the pole piece (1) is provided with coating
Area (11) and uncoated area (12), the uncoated area (12) are cut into several equidistant tabs (121), the coating area
(11) both ends are respectively and fixedly provided with protection band (2), and the protection band (2) extends to the pole for coating the uncoated area (12)
The region of ear (121).
2. as described in claim 1 a kind of for protecting the pole piece structure of diaphragm, it is characterised in that: the protection band (2)
Width is greater than or equal to the width that the uncoated area (12) extends to the region of the tab (121).
3. as claimed in claim 1 or 2 a kind of for protecting the pole piece structure of diaphragm, it is characterised in that: the protection band (2)
With a thickness of 0.1um-150um.
4. as claimed in claim 3 a kind of for protecting the pole piece structure of diaphragm, it is characterised in that: the protection band (2)
With a thickness of 90um-120um.
5. as claimed in claim 1 or 2 a kind of for protecting the pole piece structure of diaphragm, it is characterised in that: the protection band (2)
Width be 0.1mm-5mm.
6. as claimed in claim 5 a kind of for protecting the pole piece structure of diaphragm, it is characterised in that: the protection band (2)
Width is 2mm-4mm.
7. as claimed in claim 1 or 2 a kind of for protecting the pole piece structure of diaphragm, it is characterised in that: the protection band (2)
Fixed form is coining, silk-screen or stickup.
8. as claimed in claim 1 or 2 a kind of for protecting the pole piece structure of diaphragm, it is characterised in that: the protection band (2)
For one of the PET gummed paper of electrolyte resistance, PP gummed paper, PC gummed paper, PVC gummed paper.
9. as described in claim 1 a kind of for protecting the pole piece structure of diaphragm, it is characterised in that: the protection band (2)
Quantity is at least two.
10. as described in claim 1 a kind of for protecting the pole piece structure of diaphragm, it is characterised in that: the tab (121)
The calculation formula of cross-sectional area are as follows: S2=I2 ρ t/ (C* ω * Δ T), wherein S is the cross-sectional area of tab；I is to pass through tab
Electric current；ρ is tab resistivity；T is conduction time；ω is tab density, and C is constant；Δ T is tab temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920373428.9U CN209641733U (en) | 2019-03-22 | 2019-03-22 | It is a kind of for protecting the pole piece structure of diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920373428.9U CN209641733U (en) | 2019-03-22 | 2019-03-22 | It is a kind of for protecting the pole piece structure of diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209641733U true CN209641733U (en) | 2019-11-15 |
Family
ID=68496698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920373428.9U Expired - Fee Related CN209641733U (en) | 2019-03-22 | 2019-03-22 | It is a kind of for protecting the pole piece structure of diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209641733U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111540908A (en) * | 2020-05-19 | 2020-08-14 | 江苏塔菲尔新能源科技股份有限公司 | Pole piece structure and lithium ion battery |
| CN115020630A (en) * | 2022-06-23 | 2022-09-06 | 三一技术装备有限公司 | Pole piece and pole piece unit processing method, pole piece, battery and pole lug roller cutting device |
| WO2022242578A1 (en) * | 2021-05-17 | 2022-11-24 | 微宏动力***（湖州）有限公司 | Tab plate and wound battery |
| WO2024000163A1 (en) * | 2022-06-28 | 2024-01-04 | 宁德时代新能源科技股份有限公司 | Electrode sheet, electrode assembly, battery cell, battery and electric device |
-
2019
- 2019-03-22 CN CN201920373428.9U patent/CN209641733U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111540908A (en) * | 2020-05-19 | 2020-08-14 | 江苏塔菲尔新能源科技股份有限公司 | Pole piece structure and lithium ion battery |
| WO2022242578A1 (en) * | 2021-05-17 | 2022-11-24 | 微宏动力***（湖州）有限公司 | Tab plate and wound battery |
| CN115020630A (en) * | 2022-06-23 | 2022-09-06 | 三一技术装备有限公司 | Pole piece and pole piece unit processing method, pole piece, battery and pole lug roller cutting device |
| WO2024000163A1 (en) * | 2022-06-28 | 2024-01-04 | 宁德时代新能源科技股份有限公司 | Electrode sheet, electrode assembly, battery cell, battery and electric device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191115 |