CN205248365U - Battery sheet roll -in device and battery sheet - Google Patents
Battery sheet roll -in device and battery sheet Download PDFInfo
- Publication number
- CN205248365U CN205248365U CN201520786585.4U CN201520786585U CN205248365U CN 205248365 U CN205248365 U CN 205248365U CN 201520786585 U CN201520786585 U CN 201520786585U CN 205248365 U CN205248365 U CN 205248365U
- Authority
- CN
- China
- Prior art keywords
- roll
- pole piece
- battery pole
- angle theta
- pressing plate
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- 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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- 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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- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model provides a battery sheet roll -in device, including last roll -in board and lower roll clamp plate, going up the roll -in board and including a first roll -in face, the lower roll clamp plate includes a second roll -in face, first roll -in face separates relative the setting and first roll -in facial features becomes contained angle theta to second roll -in shape of face with second roll -in interfacial. This is novel still to provide a battery sheet, including the first surface and with first surface out -of -the -way second surface mutually, the first surface for the second surface forms contained angle theta. When battery sheet made electric core, the position was gone into earlier to thin one side, thick rear flank income position, the battery sheet thickness of the electric core of having makeed like this is crescent to roll core outside by roll in -core portion, positive plate and negative pole piece all can expand to some extent behind the electric core like this notes liquid, and it will have bigger expansion space to preserve electrolyte to roll up the core nexine, increase battery life and improve the security performance.
Description
Technical field
The utility model belongs to technical field of lithium batteries, relates in particular to a kind of battery pole piece rolling deviceAnd battery pole piece.
Background technology
Along with the continuous consumption of non-renewable resources and day by day highlighting of environmental problem, country is to new energyThe research and development in source is more and more paid attention to, and the index requirement of especially energy-saving and emission-reduction aspect, makes lithiumIon electrokinetic cell is very rapid in development in recent years, wide development space.
Existing conventional cylindrical battery comprises positive plate and negative plate (positive plate and the negative pole of mutual coilingSheet is commonly referred to battery pole piece), and positive plate and negative plate further comprise as positive and negative electrodeThe tinsel of conductor and coat the active material on tinsel surface. For ensureing tinselFully contact with active material in battery, tinsel is often selected the Copper Foil that internal resistance is little, ductility is goodAnd aluminium foil, the wherein anodal general aluminium foil that adopts, negative pole generally adopts Copper Foil. Existing positive/negative plate tableFace has certain requirement, and surface density is even, roll-in thickness is also required unanimously, and in fact, circlePost winding type battery is due to its architectural feature (being different from laminated type battery), at the coiling with sameAfter tension winding, positive plate and negative plate are interior to volume core outside from volume core inner (being battery core middle part)(being battery core outside) curvature difference, after battery core fluid injection, positive plate and negative plate all can expand to some extent,Volume core inner is less than the expansion space of volume core outside, therefore when volume core inner does not have enough spacesWhile offsetting the expansion of positive plate and negative plate, just cannot make positive plate, negative plate, barrier film possessEnough electrolyte, declines cell integrated capacity, cycle performance, can and protect liquid measure deficiencyCause contact internal resistance rising, while discharging and recharging, quantity of heat production is large, cannot dispel the heat in time. In long-term circulationIn process, often in the middle of negative plate, occur one because lacking electrolyte and analyse lithium band, causing canThe consumption of contrary lithium ion, declines circulating battery capability retention, reduces battery life, seriousAlso can generate Li dendrite, pierce through barrier film, thereby cause safety problem.
Utility model content
The purpose of this utility model is to provide one can extending battery life and increase cell safetyBattery pole piece rolling device and the battery pole piece of property.
For solving the problems of the technologies described above, the utility model provides a kind of battery pole piece rolling device, bagDraw together top roll pressing plate and lower roll pressing plate; Top roll pressing plate comprises one first rolling surface, and lower roll pressing plate comprises oneSecond roller pressure surface; Described the first rolling surface and second roller pressure surface interval are oppositely arranged and the first roll-inFace forms angle theta with respect to second roller pressure surface.
Further, described angle theta is 20 to 40 degree.
Further, described angle theta is 30 degree.
Further, top roll pressing plate also comprises first back side opposing with the first rolling surface, describedOne back side forms described angle theta with respect to the first rolling surface; Described lower roll pressing plate also comprises and secondSecond back side that rolling surface is opposing, described second back side is parallel to described second roller pressure surface.
Further, described top roll pressing plate and lower roll pressing plate are made up of carbide alloy.
The utility model also provides a kind of battery pole piece, comprises first surface and opposing with first surfaceSecond surface; It is characterized in that: described in described first surface forms with respect to described second surfaceAngle theta.
Further, described angle theta is 20 to 40 degree.
Further, described angle theta is 30 degree.
Further, described battery pole piece is positive plate, and described positive plate comprises aluminium foil and coatsPositive electrode on aluminium foil.
Further, described battery pole piece is negative plate, and negative plate comprises Copper Foil and coats Copper FoilOn negative material.
The beneficial effects of the utility model are: in the time that battery pole piece is made battery core, a thin side (Afterbody) first enter position, after a thick side (being head), enter position, the battery of the battery core of so having madePole piece thickness increases to volume core outside gradually by rolling up core inner, so positive plate and negative after battery core fluid injectionPole piece all can expand to some extent, and volume core nexine, by there being larger expansion space to preserve electrolyte, increases electricityThe pond life-span is also improved security performance.
Brief description of the drawings
The battery pole piece rolling device schematic diagram that Fig. 1 provides for the utility model.
Fig. 2 for the utility model passing through of providing, make by the battery pole piece rolling device shown in Fig. 1The structural representation of battery pole piece.
Detailed description of the invention
As shown in Figure 1, a kind of battery pole piece roll-in providing for the utility model preferred embodimentDevice 100, comprises top roll pressing plate 10 and lower roll pressing plate 20.
Described top roll pressing plate 10 and lower roll pressing plate 20 are made up of hard material, in present embodiment,Made by carbide alloy. Top roll pressing plate 10 comprises one first rolling surface 101, and lower roll pressing plate comprises oneSecond roller pressure surface 201. Wherein said the first rolling surface 101 is relative with second roller pressure surface 201 intervalsSetting and the first rolling surface form angle theta with respect to second roller pressure surface 201. Described angle theta is20 to 40 degree, preferred, described angle theta is 30 degree.
Further, top roll pressing plate 10 also comprises first back side opposing with the first rolling surface 101102, described first back side 102 forms described angle theta with respect to the first rolling surface 101; Under describedRoll-in plate 20 also comprises second back side 202 opposing with second roller pressure surface 201, described second back side202 are parallel to described second roller pressure surface 201.
Described the first rolling surface 101 is oppositely arranged and forms wedge shape sky with second roller pressure surface 201 intervalsBetween, wherein maximum or the minimum spacing between the first rolling surface 101 and second roller pressure surface 201 canAccording to actual conditions adjustment, but remain that the first rolling surface forms with respect to second roller pressure surface 201Described angle theta.
As shown in Figure 2, pass through the battery pole piece rolling device shown in Fig. 1 for what the utility model provided100 battery pole piece of making 200 structural representations. Described battery pole piece 200 can be battery justPole piece or negative plate. For example, when battery pole piece 200 is positive plate, positive plate comprises aluminium foil and paintingBe distributed in the positive electrode on aluminium foil; When battery pole piece 200 is negative plate, negative plate comprise Copper Foil andCoat the negative material on Copper Foil. Described battery pole piece 200 comprises first surface 21 and with firstThe second surface 22 that surface 21 is opposing. Described first surface 21 forms with respect to described second surface 22Described angle theta, described angle theta is 20 to 40 degree, preferred, described angle theta is 30 degree (described electricityFirst surface 21 is parallel to described second surface 22 before 200 roll-ins of pond pole piece, and when roll-in, described inFirst surface 21 contacts with the first rolling surface 101, and second surface 22 contacts with second roller pressure surface 201)Described battery pole piece 200, after 100 roll-ins of battery pole piece rolling device, is wedge shape, and thickness from the beginningPortion to afterbody reduces gradually, and the thickness of head can be set according to the minimum compacting of material, afterbodyThickness can set according to the maximum compacting of material, for example, the compacting of certain positive electrode is closeDegree is n1-n2g/cm3(wherein n1 is minimum compacted density, and n2 is maximum compacted density), coatingSurface density is m, and foil thickness is d, and head thickness isAfterbody thickness is
When winding battery pole piece 200 is made battery core, a thin side (being afterbody) first enters position, thickAfter one side (being head), enter position, the battery pole piece thickness of the battery core of so having made is by rolling up core innerIncrease gradually to volume core outside, so after battery core fluid injection, positive plate and negative plate all can expand to some extent,Volume core nexine, by there being larger expansion space to preserve electrolyte, increases battery life and improves securityEnergy.
The foregoing is only embodiment of the present utility model, not thereby limit of the present utility modelThe scope of the claims, every utilize equivalent structure that the utility model description and accompanying drawing content do or etc.The conversion of effect flow process, or be directly or indirectly used in other relevant technical fields, be all in like manner included inIn scope of patent protection of the present utility model.
Claims (10)
1. a battery pole piece rolling device, is characterized in that: comprise top roll pressing plate and lower roll pressing plate; Top roll pressing plate comprises one first rolling surface, and lower roll pressing plate comprises a second roller pressure surface; Described the first rolling surface and second roller pressure surface interval are oppositely arranged and the first rolling surface forms angle theta with respect to second roller pressure surface.
2. battery pole piece rolling device as claimed in claim 1, is characterized in that: described angle theta is 20 to 40 degree.
3. battery pole piece rolling device as claimed in claim 2, is characterized in that: described angle theta is 30 degree.
4. battery pole piece rolling device as claimed in claim 3, is characterized in that: top roll pressing plate also comprises first back side opposing with the first rolling surface, and described first back side forms described angle theta with respect to the first rolling surface; Described lower roll pressing plate also comprises second back side opposing with second roller pressure surface, and described second back side is parallel to described second roller pressure surface.
5. battery pole piece rolling device as claimed in claim 1, is characterized in that: described top roll pressing plate and lower roll pressing plate are made up of carbide alloy.
6. a battery pole piece, comprise first surface and with the opposing second surface of first surface; It is characterized in that: described first surface forms described angle theta with respect to described second surface.
7. battery pole piece as claimed in claim 6, is characterized in that: described angle theta is 20 to 40 degree.
8. battery pole piece as claimed in claim 7, is characterized in that: described angle theta is 30 degree.
9. battery pole piece as claimed in claim 6, is characterized in that: described battery pole piece is positive plate, and described positive plate comprises aluminium foil and coats the positive electrode on aluminium foil.
10. battery pole piece as claimed in claim 6, is characterized in that: described battery pole piece is negative plate, and negative plate comprises Copper Foil and coats the negative material on Copper Foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520786585.4U CN205248365U (en) | 2015-10-11 | 2015-10-11 | Battery sheet roll -in device and battery sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520786585.4U CN205248365U (en) | 2015-10-11 | 2015-10-11 | Battery sheet roll -in device and battery sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205248365U true CN205248365U (en) | 2016-05-18 |
Family
ID=55947441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520786585.4U Expired - Fee Related CN205248365U (en) | 2015-10-11 | 2015-10-11 | Battery sheet roll -in device and battery sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205248365U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106129477A (en) * | 2016-09-23 | 2016-11-16 | 宁德时代新能源科技股份有限公司 | Rolling device and rolling method |
| CN106571443A (en) * | 2015-10-11 | 2017-04-19 | 深圳市沃特玛电池有限公司 | Battery pole piece rolling device and battery pole piece |
| CN107655791A (en) * | 2017-09-20 | 2018-02-02 | 赣州市瑞富特科技有限公司 | A kind of cell negative electrode material electrode slice compacted density method of testing |
-
2015
- 2015-10-11 CN CN201520786585.4U patent/CN205248365U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106571443A (en) * | 2015-10-11 | 2017-04-19 | 深圳市沃特玛电池有限公司 | Battery pole piece rolling device and battery pole piece |
| CN106129477A (en) * | 2016-09-23 | 2016-11-16 | 宁德时代新能源科技股份有限公司 | Rolling device and rolling method |
| CN106129477B (en) * | 2016-09-23 | 2020-07-14 | 宁德时代新能源科技股份有限公司 | Rolling device and rolling method |
| CN107655791A (en) * | 2017-09-20 | 2018-02-02 | 赣州市瑞富特科技有限公司 | A kind of cell negative electrode material electrode slice compacted density method of testing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170316 Address after: 714000 Shaanxi high tech Zone in Weinan City, Qin Yu Lu No. 2 Patentee after: Shaanxi Voight new energy Co., Ltd. Address before: 518000 Guangdong Province, Shenzhen City Pingshan Pingshan community Zhu Keng Industrial Zone 9 1-3 Patentee before: Shenzhen Optimum Battery Co., Ltd. |
|
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20180428 Granted publication date: 20160518 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20210428 Granted publication date: 20160518 |
|
| 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: 20160518 Termination date: 20191011 |