CN105870513A - Method and device for improving covering degree of lithium ion battery wound core - Google Patents
Method and device for improving covering degree of lithium ion battery wound core Download PDFInfo
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- CN105870513A CN105870513A CN201610396780.5A CN201610396780A CN105870513A CN 105870513 A CN105870513 A CN 105870513A CN 201610396780 A CN201610396780 A CN 201610396780A CN 105870513 A CN105870513 A CN 105870513A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 17
- 239000000758 substrate Substances 0.000 claims abstract description 99
- 238000004804 winding Methods 0.000 claims abstract description 32
- 230000004888 barrier function Effects 0.000 claims description 75
- 239000000835 fiber Substances 0.000 claims description 18
- 238000012937 correction Methods 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 239000013307 optical fiber Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000005253 cladding Methods 0.000 description 11
- 230000007547 defect Effects 0.000 description 7
- 239000012528 membrane Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention belongs to the field of lithium ion batteries, and discloses a method for improving the covering degree of a lithium ion battery wound core. The method comprises the steps that 1, the standard range of the distance between a cathode plate and a substrate, the standard range of the distance between an anode plate and the substrate, the standard range of the distance between an upper diaphragm and the substrate and the standard range of the distance between a lower diaphragm and the substrate are set; 2, the distance between the cathode plate and the substrate, the distance between the anode plate and the substrate, the distance between the upper diaphragm and the substrate and the distance between the lower diaphragm and the substrate are detected in real time in the winding process; 3, measuring values are compared with the corresponding standard ranges separately; 4, the distance between the cathode plate and the substrate, the distance between the anode plate and the substrate, the distance between the upper diaphragm and the substrate and the distance between the lower diaphragm and the substrate are automatically adjusted according to comparing results, and the step 2 to the step 4 are repeatedly conducted. According to the method, the purpose of automatically adjusting the distance between the cathode plate and the substrate, the distance between the anode plate and the substrate, the distance between the upper diaphragm and the substrate and the distance between the lower diaphragm and the substrate is achieved, therefore, the cathode plate, the anode plate, the upper diaphragm and the lower diaphragm always keep a parallel state with the substrate, the central lines of the cathode plate, the anode plate, the upper diaphragm and the lower diaphragm in the depth direction always keep a coinciding state, and the covering degree of the lithium ion battery wound core in the depth direction is improved.
Description
Technical field
The present invention relates to field of lithium ion battery, particularly relate to the core cladding of lithium ion battery.
Background technology
Lithium ion battery coil core with winding method by anode, negative pole, barrier film combination forming, also referred to as battery core.To lithium
For ion battery, the cladding sufficient degree of barrier film anticathode, negative pole are most important to the cladding sufficient degree of positive pole, and cladding is not filled
Divide and then bring the critical defects such as safe, short-circuit.
Fig. 1 is the structural representation of existing battery positive/negative plate winding mechanism, and guide plate 11 is fixed on two guide shafts 12,
Two guide shafts 12 are all perpendicularly fixed at the substrate 13 of winding apparatus, near one end of substrate 13 equipped with spring 14, the other end
It is provided with knob 15.Positive/negative plate is laid on guide plate 11 and is wound, and by manual adjustment knob 15, locking guides
Plate 11 position, thus control the distance between pole piece and substrate 13 and the depth of parallelism.
Fig. 2 is the structural representation of existing battery diaphragm winding mechanism, and barrier film 16 is installed directly on a guide shaft 12 and carries out
Winding, guide shaft 12 is perpendicularly fixed at the substrate 13 of winding apparatus, near one end of substrate 13 equipped with spring 14, the other end
It is provided with knob 15.Similar with mechanism shown in Fig. 1, by manual adjustment knob 15, lock the position of barrier film 16, thus
Control the distance between barrier film 16 and substrate 13.
In the middle of prior art, the quality of electric core winding cladding, it is important to how to control positive plate, negative plate, barrier film three divide
Distance the most not and between substrate, regulate guide plate to the distance of substrate, the direction of guide plate, upper lower diaphragm plate each
Installation site on guide shaft.It is true that this regulation is completely dependent on manually, unless manual adjustment knob position is intervened,
Otherwise guide plate maintains static with diaphragm position, and cladding precision cannot meet requirement.Even if first item inspection mixes up, at equipment
Possibly also owing to various reasons occurs skew not perceived by Manufacturing Worker in running, ultimately result in product defects, greatly
Cause has following several:
If pole piece is not parallel with substrate, after winding, battery core there will be " spiral " defect of pole piece, brings security risk；
On the basis of substrate, if negative plate center line deviates with positive plate center line, an entirety is outer, and another is whole
Body is inner, after winding, the most overlapping with the center line of positive plate at width negative plate.When bias size is beyond negative pole
When sheet and the half of the difference of positive plate width, battery core there will be " revealing black " defect, brings security risk；
On the basis of substrate, as diaphragm center line deviates with negative plate center line, an entirety is outer, and another is overall
Inner, after winding, the most overlapping with negative plate center line at width barrier film.When bias size is beyond barrier film and negative pole
The three of the difference of sheet width/for the moment, battery core there will be " short-circuit " defect, brings security risk.
Summary of the invention
The technical problem to be solved is the drawbacks described above for prior art, it is provided that a kind of raising lithium ion battery coil
The method and device of core coverage degree, solves existing to be only unable to reach cladding precision by manual intervention, even results in product various
The problem of defect.
For solving this problem, the present invention provides a kind of method improving lithium ion battery coil core coverage degree, comprises the following steps:
The first step, arranges positive plate, negative plate, upper barrier film, the critical field of lower diaphragm plate to substrate distance；
Second step, in winding process, detects positive plate, negative plate, upper barrier film, the distance of lower diaphragm plate to substrate in real time；
3rd step, respectively measurement of comparison value and corresponding critical field；
4th step, automatically adjusts positive plate, negative plate, upper barrier film, the distance of lower diaphragm plate to substrate according to comparing result；
Repeat the second to the 4th step.
Further, described positive plate, negative plate, upper barrier film, the lower diaphragm plate of automatically adjusting according to comparing result is to substrate distance
Step include: if arbitrary measured value is beyond its corresponding critical field, then controlling servomotor action, regulation is used for carrying
The guide plate of positive and negative plate, in the guide shaft installing upper and lower barrier film corresponding guide plate or guide shaft relative to the position of substrate,
Measured value is made to reduce with the deviation of critical field；Otherwise, it is not adjusted.
Further, described positive plate, negative plate, upper barrier film, the distance of lower diaphragm plate to substrate include respectively: positive and negative electrode
Distance away from substrate of off-chip edge head and afterbody, the upper and lower barrier film outward flange distance away from substrate；Or positive and negative plate inner edge
Distance away from substrate of edge head and afterbody, the upper and lower barrier film inward flange distance away from substrate.
Further, the method also includes: when recording the positive and negative plate edge head distance to substrate, but cannot survey
Positive and negative plate edge tail to the distance of substrate time, keep the guide plate invariant position for carrying positive and negative plate until
Next battery core starts winding.
Further, the method also includes: when recording upper and lower diaphragm edge to the distance of substrate, sends barrier film and lacks
Material is reported to the police, up-coiler stopping action.
Present invention simultaneously provides a kind of device improving lithium ion battery coil core coverage degree, including substrate, be arranged at by guide shaft
It is respectively used to carry the guide plate of positive and negative plate on substrate, and is arranged on substrate and is respectively used to install upper and lower barrier film
Guide shaft, this device also include detector unit and correction unit, described detector unit detect in real time positive plate, negative plate, on every
Film, lower diaphragm plate to the distance of substrate, described correction unit according to the testing result of detector unit and its internal set positive plate,
Negative plate, upper barrier film, lower diaphragm plate, to the comparing result of substrate distance critical field, automatically adjust and are used for carrying positive and negative plate
Guide plate, for installing the guide shaft of the upper and lower barrier film position relative to substrate.
Further, described correction unit includes control unit and the multiple servomotors being connected respectively with each guide shaft, described
Guide shaft is screw mandrel, and described control unit receives the testing result of detector unit, according to set by testing result and its inside just
Pole piece, negative plate, upper barrier film, lower diaphragm plate, to the comparing result of substrate distance critical field, control servomotor action and drive
Screw mandrel moves.
Further, described control unit is PLC.
Further, described detector unit includes laying respectively at the guide plate outward flange head for carrying positive and negative plate and tail
Portion, for installing the outer peripheral multiple fiber sensors of guide shaft of upper and lower barrier film, or lay respectively at for carrying positive and negative electrode
The guide plate inward flange head of sheet and afterbody, for installing multiple fiber sensors of the guide shaft inward flange of upper and lower barrier film.
Further, this device also includes alarm, when described detector unit cannot record upper and lower barrier film to substrate distance,
Control unit controls alarm equipment alarm.
The present invention by positive plate, negative plate, upper barrier film, the distance of lower diaphragm plate to substrate are detected in real time, and according to
Measured value and the deviation of critical field, constantly adjust for carrying the guide plate of positive and negative plate, for installing upper and lower barrier film
Guide shaft, make deviation reduce, it is achieved that automatically to adjust positive plate, negative plate, upper barrier film, the mesh of lower diaphragm plate to substrate distance
So that positive plate, negative plate, upper barrier film, lower diaphragm plate and substrate remain parastate, positive plate, negative plate,
The center line of upper barrier film, lower diaphragm plate each width remains coincidence status, improves the coverage degree of core width.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing positive and negative plate winding mechanism；
Fig. 2 is the structural representation of existing upper and lower membrane winding mechanism；
Fig. 3 is the structural representation of positive and negative plate winding mechanism of the present invention；
Fig. 4 is the structural representation of the present invention upper and lower membrane winding mechanism；
Fig. 5 is the method flow diagram of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.
Core coverage degree is carried out by the way of manual intervention in view of the existing equipment carrying out lithium ion battery coil core cladding
Adjust, the observation of the operating personnel that place one's entire reliance upon, as observed not in time or regulating the most accurate, it is easy to cause product defects,
The present invention provides a kind of can realize detection automatically and the device adjusted, to improve lithium ion battery coil core to core coverage degree
Coverage degree.
As shown in Figure 3,4, this device includes substrate 13, is respectively used to carry the guide plate 11, Yi Jifen of positive and negative plate
Yong Yu not install the guide shaft 12 of upper and lower barrier film 16.In order to realize automatically detecting and adjust, this device also includes detector unit
And correction unit, detector unit detects positive plate, negative plate, upper barrier film, lower diaphragm plate in real time to the distance of substrate 13, entangles
Partially unit according to the testing result of detector unit and internal set positive plate, negative plate, upper barrier film, lower diaphragm plate to substrate
The comparing result of 13 criterion distance scopes adjusts the guide plate 11 for carrying positive and negative plate, upper and lower for installing automatically
The guide shaft 12 of barrier film is relative to the position of substrate 13.
Wherein, for carry positive and negative plate guide plate 11 respectively by being arranged at two guide shafts 12 of its head and afterbody
Be connected with substrate 13, be also connected with substrate 13 for the guide shaft 12 installing upper and lower barrier film, regulate for convenience positive plate,
Negative plate, upper barrier film, lower diaphragm plate 16 all use screw mandrel relative to the position of substrate 13, above-mentioned guide shaft 12.
Detector unit includes multiple fiber sensor 17.It is being respectively used to carry guide plate 11 head and the tail of positive and negative plate
Perforate on edge, portion, is respectively provided with fiber sensor 17 in hole, for reading positive and negative electrode head, the afterbody distance away from substrate；
Fiber sensor 17 is set being respectively used to install on the guide shaft 12 of upper and lower barrier film 16, is used for reading upper and lower barrier film 16
Distance away from substrate 13.Above-mentioned fiber sensor 17 is arranged at guide plate 11 inner edge for carrying positive and negative plate simultaneously
Edge, for installing guide shaft 12 inward flange of upper and lower barrier film 16, or be arranged at the guiding for carrying positive and negative plate simultaneously
Plate 11 outward flange, for installing guide shaft 12 outward flange of upper and lower barrier film 16, to ensure that control unit can use unification
Positive plate, negative plate, upper barrier film, the distance of lower diaphragm plate 16 to substrate 13 are configured by standard.
Correction unit includes that control unit and multiple servomotor, different screw mandrels connect different servomotors.Above-mentioned each light
Fine inductor 17 detects positive plate head edge, positive plate tail edge, negative plate head edge, negative pole run-out respectively
Diaphragm edge and lower diaphragm plate edge on edge, portion, measure the range data between each edge and substrate 13 the most respectively, control
Unit processed constantly extracts above-mentioned six range data, with its internal arrange in advance positive plate, negative plate, upper barrier film, under every
Film compares to substrate 13 criterion distance scope, controls each corresponding servomotor action according to comparative result, drives phase
The screw mandrel answered advances or retreats, so that positive plate, negative plate, upper barrier film, lower diaphragm plate to the distance of substrate 13 can fall
Enter in its corresponding critical field, thus realize positive and negative plate and upper and lower diaphragm position are precisely controlled.
This device also includes alarm, when detector unit cannot detect upper barrier film or lower diaphragm plate to the distance of substrate 13,
The control unit upper and lower barrier film of transmission lacks expects that alarm signal, to alarm, sends warning, and it is out of service to control up-coiler.
Control unit of the present invention is PLC, compared to controller strong interference immunities such as single-chip microcomputers, compared to
The mode being controlled based on image processing is with low cost.In actual production, use PLC that first core coil is walked around
After journey is automatically adjusted, without being adjusted within least one day, the electric core winding coverage degree obtained all can reach again
Requirement, say, that start only needs to be adjusted meeting requirement to first electric core winding process every time.Visible, use
PLC is fully able to meet Production requirement, and its cost is the lowest, and cost performance is the highest.
Below as a example by certain model battery core, in conjunction with accompanying drawing 5, the method that the present invention improves lithium ion battery coil core coverage degree is entered
Row describes in detail.Each fiber sensor may be contained within the inward flange of guide plate or guide shaft, for sake of convenience, by positive plate inner edge
Edge head is A1 to the distance definition of substrate, and the distance definition of positive plate inward flange afterbody to substrate is A2, negative plate inner edge
Edge head is B1 to the distance definition of substrate, and the distance definition of negative plate inward flange afterbody to substrate is B2, upper barrier film inner edge
Edge is C to the distance definition of substrate, and the distance definition of lower diaphragm plate inward flange to substrate is D.
The method comprises the following steps:
The first step, arrange in control unit positive plate, negative plate, on barrier film, the critical field of lower diaphragm plate to substrate distance.
The perfect condition of lithium ion battery coil core cladding is, in the direction of the width, in positive and negative plate and upper and lower barrier film
Heart line is completely superposed.In view of make pole piece and there is machining accuracy error during barrier film, coiling action itself bring error etc. because of
Element, the risk bad in order to reduce cladding, negative plate design width is between positive plate design width and diaphragm design width.
Under preferable coated state, the distance that each fiber sensor detects should meet following relation:
A1=A2 ＜ B1=B2 ＜ C=D；
B1 A1=(negative plate width-positive plate width) ÷ 2
C B1=(barrier film width-negative plate width) ÷ 2
Assume this model the electric core membrane width ratio big 3.0mm of negative plate width, the negative plate width ratio big 2.0mm of positive plate width.
Under original state, we set positive plate inward flange distance A1 to substrate of this model, A2 as 280.0mm, (for not
Same winding apparatus, this value is different, need to obtain this value according to actual measurement of current device structure.) in view of positive and negative plate
And the difference of upper and lower barrier film width, distance B1 of negative plate inward flange to substrate, B2 should be 279.0mm, upper and lower every
Film inward flange should be 277.5mm to distance C, the D of substrate.Error can be produced in view of in actual winding process, therefore exist
PLC arranges A1, A2 value allow in the range of 279.9～280.1mm；Arrange B1, B2 value allow in the range of 278.9～
279.1mm；Arrange C, D value to allow in the range of 277.4～277.6mm.
Second step, in winding process, detects positive plate, negative plate, upper barrier film, the distance of lower diaphragm plate to substrate in real time.
Manually positive and negative plate is respectively put in its corresponding guide plate track, starts volume pin and start winding, corresponding guide plate
Two fiber sensors of head and afterbody persistently capture positive and negative plate inward flange, and measure A1, A2, B1, B2 value.
Manually upper and lower barrier film is installed on guide shaft, after unreeling the fiber sensor on corresponding guide shaft persistently capture upper and lower every
Film inward flange, and measure C, D value.
3rd step, respectively measurement of comparison value and corresponding critical field.
After winding starts, PLC constantly extracts A1, A2, B1, B2, C, D value that each fiber sensor measurement is arrived, and will
The measurement data being drawn into each time compares with corresponding critical field, i.e. judge A1 and A2 whether 279.9～
In the range of 280.1mm, whether B1 and B2 be in the range of 278.9～279.1mm, and whether C and D value is 277.4～277.6mm
In the range of.
4th step, automatically adjusts positive plate, negative plate, upper barrier film, the distance of lower diaphragm plate to substrate according to comparing result.
For positive plate, if A1, A2 value is in the critical field 279.9～280.1mm of its correspondence, servomotor is motionless
Making, guide plate does not offsets；If A1, A2 are more than 280.1mm or less than 279.9mm, then send a signal to the servo of correspondence
Motor, drives screw mandrel to rotate, makes corresponding guide plate to inner side or offset laterally, making the deviation of measured value and critical field
Reduce, it is achieved correction.In equipment running process, fiber sensor the most constantly detects A1, A2 value, and PLC is constantly sentenced
Whether disconnected A1, A2 value exceeds the scope of 279.9～280.1mm, rectifies a deviation further according to judged result, the most constantly repeat on
State the second to the 4th step.Along with the winding of positive plate runs, the fiber sensor corresponding when positive plate can detect A1 value,
But when A2 value can not be detected, then it is assumed that this positive plate winding is complete, until before next battery core starts winding, screw mandrel is protected
Holding motionless, guide plate keeps not offseting.
For negative plate, if B1, B2 value is in the critical field 278.9～279.1mm of its correspondence, servomotor is motionless
Making, guide plate does not offsets；If B1, B2 are more than 279.1mm or less than 278.9mm, then send a signal to the servo of correspondence
Motor, drives screw mandrel to rotate, makes corresponding guide plate to inner side or offset laterally, making the deviation of measured value and critical field
Reduce, it is achieved correction.In equipment running process, fiber sensor the most constantly detects B1, B2 value, and PLC is constantly sentenced
Whether disconnected B1, B2 value exceeds the scope of 278.9～279.1mm, rectifies a deviation further according to judged result, the most constantly repeat on
State the second to the 4th step.Along with the winding of negative plate runs, the fiber sensor corresponding when negative plate can detect B1 value,
But when B2 value can not be detected, then it is assumed that this negative plate winding is complete, until before next battery core starts winding, screw mandrel is protected
Holding motionless, guide plate keeps not offseting.
For upper and lower membrane portions, if C, D value is in the critical field 277.4～277.6mm of its correspondence, servo electricity
Machine is failure to actuate, and guide plate does not offsets；If C, D are more than 277.6mm or less than 277.4mm, then send a signal to correspondence
Servomotor, drives and leads axially inner side accordingly or offset laterally, make measured value reduce with the deviation of critical field, it is achieved
Correction.In equipment running process, fiber sensor the most constantly detects C, D value, and PLC constantly judges that C, D value is
No exceed 277.4～277.6mm scope, rectify a deviation further according to judged result, the most constantly repeat above-mentioned second to the 4th
Step.When the fiber sensor that upper barrier film is corresponding can't detect C value, then it is assumed that upper barrier film lacks material；When the optical fiber that lower diaphragm plate is corresponding
Inductor can't detect D value, then it is assumed that lower diaphragm plate lacks material, feeds back signal to PLC, and program is reported to the police and points out barrier film to lack material,
Up-coiler is out of service.
Pass through above method, it is possible to achieve automatically adjust for carrying the guide plate of positive and negative plate and upper and lower for installing
The purpose of the guide shaft position of barrier film so that positive plate, negative plate, upper barrier film, lower diaphragm plate and substrate remain parastate,
Positive plate, negative plate, upper barrier film, the center line of lower diaphragm plate each width remain coincidence status, thus realize every
Film anticathode sheet, the negative plate optimum cladding to positive plate.
Claims (10)
1. the method improving lithium ion battery coil core coverage degree, it is characterised in that comprise the following steps:
The first step, arranges positive plate, negative plate, upper barrier film, the critical field of lower diaphragm plate to substrate distance；
Second step, in winding process, detects positive plate, negative plate, upper barrier film, the distance of lower diaphragm plate to substrate in real time；
3rd step, respectively measurement of comparison value and corresponding critical field；
4th step, automatically adjusts positive plate, negative plate, upper barrier film, the distance of lower diaphragm plate to substrate according to comparing result；
Repeat the second to the 4th step.
Method the most according to claim 1, it is characterised in that described automatically adjust positive plate, negative pole according to comparing result
Sheet, upper barrier film, the step of lower diaphragm plate to substrate distance include:
If arbitrary measured value exceeds its corresponding critical field, then controlling servomotor action, regulation is used for carrying positive and negative electrode
The guide plate of sheet, in the guide shaft installing upper and lower barrier film, corresponding guide plate or guide shaft, relative to the position of substrate, make measurement
Value reduces with the deviation of critical field；
Otherwise, it is not adjusted.
Method the most according to claim 1, it is characterised in that described positive plate, negative plate, upper barrier film, lower diaphragm plate are extremely
The distance of substrate includes respectively: distance away from substrate of positive and negative plate outward flange head and afterbody, upper and lower barrier film outward flange away from
The distance of substrate, or distance away from substrate of positive and negative plate inward flange head and afterbody, upper and lower barrier film inward flange are away from substrate
Distance.
Method the most according to claim 3, it is characterised in that the method also includes:
When recording the positive and negative plate edge head distance to substrate, but positive and negative plate edge tail cannot be recorded to base
During the distance of plate, keep the guide plate invariant position for carrying positive and negative plate until next battery core starts winding.
Method the most according to claim 3, it is characterised in that the method also includes:
When upper and lower diaphragm edge cannot be recorded to the distance of substrate, send barrier film and lack material and report to the police, up-coiler stopping action.
6. improve a device for lithium ion battery coil core coverage degree, including substrate, be arranged on substrate by guide shaft and be respectively used to
The guide plate of carrying positive and negative plate, and it is arranged on substrate the guide shaft being respectively used to install upper and lower barrier film, its feature exists
Also include detector unit and correction unit in, this device, described detector unit detect in real time positive plate, negative plate, upper barrier film,
Lower diaphragm plate is to the distance of substrate, and described correction unit is according to the testing result of detector unit and its internal set positive plate, negative
Pole piece, upper barrier film, lower diaphragm plate, to the comparing result of substrate distance critical field, adjust automatically for carrying positive and negative plate
Guide plate, for installing the guide shaft of the upper and lower barrier film position relative to substrate.
Device the most according to claim 6, it is characterised in that: described correction unit include control unit and respectively with respectively
Multiple servomotors that guide shaft connects, described guide shaft is screw mandrel, and described control unit receives the testing result of detector unit,
Right to substrate distance critical field with its internal set positive plate, negative plate, upper barrier film, lower diaphragm plate according to testing result
Ratio result, controls servomotor action and drives screw mandrel motion.
Device the most according to claim 7, it is characterised in that: described control unit is PLC.
9. according to the arbitrary described device of claim 6-8, it is characterised in that: described detector unit includes laying respectively at for holding
Carry the guide plate outward flange head of positive and negative plate and afterbody, for installing the outer peripheral multiple optical fiber of guide shaft of upper and lower barrier film
Inductor, or lay respectively at the guide plate inward flange head for carrying positive and negative plate and afterbody, for install upper and lower every
Multiple fiber sensors of the guide shaft inward flange of film.
10. according to the device described in claim 7 or 8, it is characterised in that: this device also includes alarm, described detector unit
When cannot record upper and lower barrier film to substrate distance, control unit controls alarm equipment alarm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610396780.5A CN105870513B (en) | 2016-06-06 | 2016-06-06 | A kind of method and device improving lithium ion battery coil core coverage degree |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610396780.5A CN105870513B (en) | 2016-06-06 | 2016-06-06 | A kind of method and device improving lithium ion battery coil core coverage degree |
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| CN105870513A true CN105870513A (en) | 2016-08-17 |
| CN105870513B CN105870513B (en) | 2018-11-27 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799831A (en) * | 2017-11-06 | 2018-03-13 | 无锡先导智能装备股份有限公司 | The determination method and determining device of a kind of battery core datum line |
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| CN114614076A (en) * | 2022-03-21 | 2022-06-10 | 上海兰钧新能源科技有限公司 | Secondary battery cell manufacturing method and secondary battery cell thereof |
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