CN103934285A - Battery pole piece rolling method and battery pole piece multistage roller machine - Google Patents
Battery pole piece rolling method and battery pole piece multistage roller machine Download PDFInfo
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- CN103934285A CN103934285A CN201410187567.4A CN201410187567A CN103934285A CN 103934285 A CN103934285 A CN 103934285A CN 201410187567 A CN201410187567 A CN 201410187567A CN 103934285 A CN103934285 A CN 103934285A
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- 238000005096 rolling process Methods 0.000 title claims description 58
- 238000000034 method Methods 0.000 title description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 239000011149 active material Substances 0.000 claims description 25
- 239000002245 particle Substances 0.000 claims description 15
- 230000009123 feedback regulation Effects 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000000052 comparative effect Effects 0.000 claims description 4
- 238000003384 imaging method Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 description 23
- 238000007906 compression Methods 0.000 description 23
- 239000013543 active substance Substances 0.000 description 11
- 239000011247 coating layer Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- 239000010410 layer Substances 0.000 description 10
- 230000006872 improvement Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 238000003801 milling Methods 0.000 description 5
- 238000007766 curtain coating Methods 0.000 description 4
- 238000005056 compaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000006258 conductive agent Substances 0.000 description 2
- 230000005662 electromechanics Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 238000007591 painting process Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000004393 prognosis Methods 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
Abstract
A battery pole piece multistage roller machine comprises a thicknessing device. The thicknessing device comprises a first roller and a second roller. A gap adjusting mechanism is arranged between bearing blocks at the two ends of the first roller, and a gap adjusting mechanism is arranged between bearing blocks at the two ends of the second roller. Hydraulic devices act on the two ends of the first roller or the two ends of the second roller to make the roll gap between the two rollers maintained basically constant. The battery pole piece multistage roller machine further comprises at least one prepressing device. Each prepressing device comprises a first prepressing roller, a second prepressing roller and a pair of prepressing roller elastic hydraulic devices, a prepressing roller gap is formed between the first prepressing roller and the second prepressing roller, and the prepressing roller elastic hydraulic devices respectively act on the two ends of the first prepressing roller or the two ends of the second prepressing roller to make the pressure of the first prepressing roller or the pressure of the second prepressing roller maintained basically constant. The battery pole piece multistage roller machine is wide in application range and can be used for a single-side pole piece or a two-side pole piece or an ordinary pole piece without any structural adjustment, and therefore universality of the roller machine is improved.
Description
Technical field
The present invention relates to one to battery pole piece, the especially battery pole piece pressure rolling method of electrodes of lithium-ion batteries and multistage roller mill thereof.
Background technology
Lithium ion battery is made up of lithium-ion electric core, electrolyte, holding circuit (PCM) and housing parts.Battery core is made up of positive pole, negative pole and barrier film.Anodal part is positive electrode (as LiFePO4)+conductive agent+adhesive (PVDF)+collector (aluminium foil), and the part of negative pole is graphite+conductive agent+thickener (CMC)+binding agent (SBR)+collector (Copper Foil).Anodal and negative pole is commonly referred to as battery pole piece in the industry cycle, and in order to improve the density of battery pole piece surfacing and the uniformity of thickness, positive/negative plate must carry out roll extrusion after painting process, and this operation is called the rolling of battery pole piece.
The process of battery pole piece rolling is that battery pole piece is drawn in by the frictional force producing between roll and battery pole piece between the roll of rotation, the process of battery pole piece compressive deformation.The rolling of battery pole piece is different from the rolling of bloom, and the process of steel rolling is the process that an iron molecule extends longitudinally and laterally spreads, and its density does not change in the operation of rolling; And the rolling of battery pole piece is the process of battery material compaction on a positive/negative plate, its object is to increase the compacted density of negative or positive electrode material, suitable compacted density can increase the discharge capacity of battery, reduce internal resistance, reduce polarization loss, extend the cycle life of battery, improve the utilization rate of lithium ion battery.Through overtesting, suitable positive electrode compacted density is about 2.8g/cm
3-3.4g/cm
3between, negative pole be about 1.5g/cm
3.Compacted density excessive or too small, is all unfavorable for embedding or the deintercalation of lithium ion.Therefore, when battery pole piece is implemented roll extrusion, roll-force is unsuitable excessive also unsuitable too small, should meet the feature of battery pole piece material.
Existing battery pole piece roller mill, the most frequently used two-roller mill, it comprises top roll and lower roll, between the two end axles bearing of described topping roll and bottom roll, be respectively provided with a pair of voussoir (gap adjusting device) that rolls seam for regulating, bottom, two ends at bottom roll is provided with the hydraulic means that bottom roll is upwards pushed up, described hydraulic means ensures to roll the stable of seam, is referred to as surely to roll seam rolling in industry; Be exactly the three-high mill that is seen in patent documentation in addition, alternative expression battery pole piece rolling mill as disclosed in Chinese patent literature CN 202411090U, comprises topping roll and bottom roll, is provided with again central roll between topping roll and bottom roll; Below bottom roll, be provided with downforce device, downforce device adopts hydraulic transmission mode; Pressure apparatus on being provided with on topping roll, upper pressure apparatus adopts screw drive mode; Between topping roll and central roll, be provided with gap adjusting device, between bottom roll and central roll, be provided with lower gap adjusting device.Alternative expression milling train completes after the first passage rolling between central roll is with bottom roll, in beeline, battery pole piece is sent into central roll with completing the second passage rolling between topping roll, and its essence of this three-high mill is also surely to roll seam rolling.Be seen in addition the four-high mill of patent documentation, four roller tandem rolling electrothermal battery pole piece rolling mills as disclosed in Chinese patent literature CN, comprise frame, be arranged on motor and the rolling device being connected with motor-driven in frame, described rolling device comprises two groups of pair rollers that level is set up in parallel, and every group of pair roller comprises two Electromechanic heating rollers that are set up in parallel up and down; This Electromechanic heating roller comprises the roller of hollow, the plug that is arranged on roller inside and the solenoid of uniform winding on plug; Described roller is arranged in frame by bearing I; Described plug is fixedly installed in frame, and end, plug one end is extended roller cavity and is fixedly connected with frame, between plug and roller, is flexibly connected by bearing II.This four-high mill is also surely to roll seam rolling.
Existing surely roll seam milling train it utilize substantially invariable roll seam come rolling battery pole piece, there is the problem of following several aspects in it, the one, in the time that the coating layer of active substance area on substrate two sides does not wait, surely roll seam suppress kind in, substantially not being compacted of the redundance that area is large, affect the capacity of battery, as shown in Figure 1, establish respectively the first coating layer of active substance 200 and the second coating layer of active substance 300 on the two sides of substrate 100, the wherein long H of Length Ratio first coating layer of active substance 200 of the second coating layer of active substance 300, suppose that substrate thickness is 10 μ, the first initial coating layer of active substance and the thickness of the second coating layer of active substance are respectively 120 μ, compression ratio is 70%, battery pole piece thickness after so compressed should be 240 μ X70%+10 μ=178 μ, in order to prevent the bounce-back of battery pole piece after compressed, generally being less than of seaming battery pole piece thickness after compressed will be rolled, be less than 178 μ, be generally 170-175 μ, roll seam when the 170-175 μ when establishing, obviously, ratio first coating layer of active substance 200 of the second coating layer of active substance 300 in this example grow part, it is H institute corresponding part, its thickness only has 120 μ, in the time stitching by rolling of 170-175 μ, be do not have compressed, this certainly will have influence on the capacity of last battery, the 2nd, double-roll rolling mill single deflection is excessive, can cause that coating layer of active substance kills, curtain coating or expand to surrounding, be unfavorable for the compacting of coating layer of active substance, although, existing three rollers or four-high mill adopt two to roll successively pressure rolling of seam, roll seam, but its rolling battery pole piece out neither very good (namely H institute corresponding part there is no) compressed, the 3rd, this fixed roller type milling train, its active force is to act on the voussoir at two ends of bottom roll, its effective pressure is far smaller than active force, causes the waste of hydraulic coupling.
Chinese patent literature CN203155697U discloses a kind of single double-side cell pole piece milling train, it is that quadruplet dished spring assembly is arranged between up-down rollers bearing block, and when pole piece rolling, wedge is thrown off, on oil cylinder, pressure pressure is offset the precompression of dish spring, and up-down rollers is in quick condition.Keep constant pressure at the one side of the two-sided pole piece of rolling list with when two-sided, thereby ensured the one side compression ratio identical with double-side material.In the time of the common pole piece of rolling, adjust wedge and make wedge play the effect that seam is rolled in adjustment, also can the common pole piece of rolling.This milling train, between the common pole piece of rolling and other one sides and two-sided pole piece, need to be exchanged and just can use between wedge and dish spring, makes the use between different pole piece thickness become loaded down with trivial details, uses and is subject to certain limitation; In addition, dish spring is located between up-down rollers bearing block, cannot accomplish the elastic force of dish spring to control, along with the increase of dish spring compression number of times, the creep of dish spring causes coefficient of elasticity to change, and the pressure that causes acting on pole piece changes, and pressure changes uncontrollable, therefore, its compression ratio is just difficult to control accurately.
Summary of the invention
In order to overcome the problems referred to above, the invention provides a kind of versatility good, no matter one side, two-sided or common pole piece all can use, and the compression ratio of battery pole piece battery pole piece pressure rolling method and the multistage roller mill thereof that can precisely control.
Technical scheme of the present invention is: a kind of battery pole piece pressure rolling method is provided, comprises the steps,
(1), the compacting step of battery pole piece, this step is at least realized by a prepressing device, the spacing of rolling seam of described prepressing device is flexible in the process of rolling pole piece, described in to roll seam be to realize by acting on elastic hydraulic pneumatic shuttle on the roller forming in these two rollers that roll seam;
(2), the fixed thick step of battery pole piece, this step is realized by surely thick device, the spacing of rolling seam of described fixed thick device is changeless in the process of rolling pole piece, and the spacing of rolling seam of described fixed thick device is less than or equal to the design thickness of the pole piece after being rolled;
(3), battery pole piece first after compacting, then enter surely thick step and carry out the thickness correction of battery pole piece.
As improvement of the present invention, described elastic hydraulic pneumatic shuttle comprises that the gentle splenium of hydraulic part divides, and described hydraulic part acts on the air of air pressure part, by hydraulic compression air, and pressure being passed to piston and the push rod of air part, push rod remakes for roll.
As improvement of the present invention, also comprise pressure detecting closed-loop adjustment step, by detecting the size of the pressure that rolls seam of described prepressing device, come the hydraulic pressure of elastic hydraulic pneumatic shuttle or the size of air pressure described in feedback regulation.
As improvement of the present invention, also comprise that thickness detects closed-loop adjustment step, by detecting the thickness of the battery pole piece after described prepressing device or fixed thick device, come the hydraulic pressure of elastic hydraulic pneumatic shuttle or the size of air pressure described in feedback regulation.
As improvement of the present invention, the particle integrity that also comprises active material layer detects closed-loop adjustment step, by detecting the particle integrity of active material layer of the battery pole piece after described prepressing device or fixed thick device, come the hydraulic pressure of elastic hydraulic pneumatic shuttle or the size of air pressure described in feedback regulation.
The present invention also provides a kind of battery pole piece multistage roller mill, comprise surely thick device, described fixed thick device comprises the first roll and the second roll, between described the first roll and the bearing block at the second roll two ends, be respectively provided with a Ge Tiaofeng mechanism, hydraulic means acts on the two ends of described the first roll or the second roll, keep rolling seam substantially constant between two rolls, also comprise at least one prepressing device, each described prepressing device comprises pony press and a pair of pony press elastic hydraulic pneumatic shuttle, between described pony press and described the first roll or the second roll, form pre-pressure rolling seam, described pony press elastic hydraulic pneumatic shuttle acts on respectively the two ends of described pony press, keep the pressure substantially constant of described pony press, reach Digital Control precision.
The present invention also provides a kind of battery pole piece multistage roller mill, comprise surely thick device, described fixed thick device comprises the first roll and the second roll, between described the first roll and the bearing block at the second roll two ends, be respectively provided with a Ge Tiaofeng mechanism, hydraulic means acts on the two ends of described the first roll or the second roll, keep rolling seam substantially constant between two rolls, also comprise at least one prepressing device, each described prepressing device comprises the first pony press, the second pony press, and a pair of pony press elastic hydraulic pneumatic shuttle, between described the first pony press and described the second pony press, form pre-pressure rolling seam, described pony press elastic hydraulic pneumatic shuttle acts on respectively the two ends of described the first pony press or the second pony press, keep the pressure substantially constant of described the first pony press or the second pony press.
As improvement of the present invention, described pony press elastic hydraulic pneumatic shuttle comprises cylinder body, is provided with first piston and the second piston in described cylinder body, and push rod is connected with first piston, and stretches out in one end of described cylinder body, acts on the two ends of described the first pony press; Between described first piston and the second piston, be air zone, described the second piston forms hydraulic pressure district away from the one side of air zone with described cylinder body, and described hydraulic pressure district is connected with Hydraulic Station by hydraulic inlet.
As improvement of the present invention, also comprise pressure detecting closed-loop adjustment device, described pressure detecting closed-loop adjustment device comprises pressure transducer and control circuit, described pressure transducer is by detecting the pressure that rolls seam of described prepressing device, and by flowing to control circuit after analog-to-digital conversion, described control circuit regulates the hydraulic pressure of described pony press elastic hydraulic pneumatic shuttle or the size of air pressure according to the variation of pressure.
As improvement of the present invention, also comprise that thickness detects closed-loop adjustment device, described thickness detects closed-loop adjustment device and comprises pole piece thickness measure mechanism, control circuit and mechanical actuating mechanism, described pole piece thickness measure mechanism is by detecting the thickness of the battery pole piece after described prepressing device or fixed thick device, and by flowing to control circuit after analog-to-digital conversion, described control circuit is according to the variation of pole piece thickness, carrys out described in feedback regulation the hydraulic pressure of elastic hydraulic pneumatic shuttle or the size of air pressure is rolled seam by described mechanical actuating mechanism.
As improvement of the present invention, the particle integrity that also comprises active material layer detects closed-loop adjustment device, described particle integrity detects closed-loop adjustment device and comprises digital camera head or ray class checkout gear and control circuit, described digital camera head or ray class checkout gear are taken the image on the active material layer surface of the battery pole piece after described prepressing device or fixed thick device, flow to control circuit, the image that control circuit obtains shooting compares with pre-standard picture in control circuit, and come the hydraulic pressure of elastic hydraulic pneumatic shuttle or the size of air pressure described in feedback regulation according to comparative result.
The present invention is owing to having adopted the prepressing device of one or more employing constant pressures, no matter one side, two-sided or common pole piece, and the thickness of active material on two-sided equates or unequally all can in the situation that not doing any structural adjustment, use, as long as being output into pressure by oil cylinder or cylinder, pressure is transferred to the safe pressure that is less than battery pole piece active material particle destruction, just can ensure that active material is not destroyed, versatility and the efficiency of the roller mill meanwhile, also having improved; In addition, adopt the particle integrity of pressure detecting, thickness detection and/or active material layer to detect, closed-loop adjustment can improve the quality conformance of battery pole piece, thereby can finally improve the overall performance of battery core.
Brief description of the drawings
fig. 1 is the battery pole piece cross-sectional view of existing double spread.
Fig. 2 is the planar structure schematic diagram of an embodiment of the present invention.
Fig. 3 is the side structure schematic diagram of the three-high mill in embodiment illustrated in fig. 2.
Fig. 4 is the plan structure schematic diagram of the three-high mill in embodiment illustrated in fig. 2.
Fig. 5 is the planar structure schematic diagram of the second embodiment of the present invention.
Fig. 6 is the structural representation of the pony press elastic hydraulic pneumatic shuttle in the present invention.
Detailed description of the invention
The invention provides a kind of battery pole piece pressure rolling method, comprise the steps,
(1), the compacting step of battery pole piece, this step is at least realized by a prepressing device, the spacing of rolling seam of described prepressing device is flexible in the process of rolling pole piece, described in to roll seam pressure be to realize by acting on elastic hydraulic pneumatic shuttle on the roller forming in these two rollers that roll seam; (precompressed of battery pole piece is herein that the pony press that employing is put control by elastic hydraulic is realized, can adopt the substantially invariable prepressing device of one or more levels pressure in the precompressed stage, the 80%-95% of the compression ratio of battery pole piece was realized in the precompressed stage, as the compression ratio of supposing battery pole piece is designed to 30%-35%, the compression ratio of so-called battery pole piece refers to that the original depth of battery pole piece deducts the value of the thickness gained of the battery pole piece after compressed, with the percentage of the original depth of battery pole piece; The precompressed stage will by compressed the 80%-95% of compression ratio 30%-35% fall, only stay the 5%-20% of compression ratio 30%-35% to enter surely thick phase process, like this, no matter just can realize battery pole piece is single or double, no matter two-sided is uniform thickness homalographic, and still uniform thickness area is not unequal yet, can reach identical compression ratio in precompressed process, playing the effect of the active material compacting to battery pole piece, is next step fixed thick the getting ready of battery pole piece.When prepressing device is while being multistage, can design in advance the compression ratio of every grade, the compression ratio of every grade can be identical, also can be different, as long as ensure that the compression energy of the prepressing device before fixed thick step reaches designing requirement, if overall compression ratio is 30%, the precommpression in precompressed stage is than being 90% of overall compression ratio, have three grades of precommpression, every grade of precommpression is than equating, every grade of precommpression is than being 30%.
(2), the fixed thick step of battery pole piece, this step is realized by surely thick device, the spacing of rolling seam of described fixed thick device is changeless in the process of rolling pole piece, and the spacing of rolling seam of described fixed thick device is less than or equal to the design thickness of the pole piece after being rolled; Electrode plates is fixed thick is the seam that rolls that adopts determining deviation, to the further compression of the compression ratio staying in the precompressed stage, make battery pole piece reach design thickness, due to the final thickness that rolls seam and relatively approached battery pole piece in thick stage surely, so also just can be because of conventional compression time, cause too greatly the problems such as active material curtain coating distortion on battery pole piece due to single compression compression ratio.Fixed thick step is only that the battery pole piece that is slightly larger than battery pole piece final thickness is compressed to final thickness.
(3), battery pole piece first after compacting, then enter surely thick step and carry out the thickness correction of battery pole piece.
In the present invention, described elastic hydraulic pneumatic shuttle comprises that the gentle splenium of hydraulic part divides, and described hydraulic part acts on the air of air pressure part or air pressure partial action in hydraulic part, and pressure is passed to piston and push rod, and push rod remakes for roll.。Because the compressed-air actuated volume of air part has certain telescopicing performance, can play like this elastic reaction, keep the pressure substantially constant of pony press, can play the well compaction of the active material to battery pole piece, and don't cause the curtain coating of active material.
In order to ensure the quality of product, the present invention also can comprise pressure detecting closed-loop adjustment step, by detecting the size of the pressure that rolls seam of described prepressing device, comes the hydraulic pressure of elastic hydraulic pneumatic shuttle or the size of air pressure described in feedback regulation.Specific implementation mechanism refers to following content.
In order to ensure the quality of product, the present invention also can comprise that thickness detects closed-loop adjustment step, by detecting the thickness of the battery pole piece after described prepressing device or fixed thick device, comes the hydraulic pressure of elastic hydraulic pneumatic shuttle or the size of air pressure described in feedback regulation.Specific implementation mechanism refers to following content.
In order to ensure the quality of product, the present invention also can comprise that the particle integrity of active material layer detects closed-loop adjustment step, by detecting the particle integrity of active material layer of the battery pole piece after described prepressing device or fixed thick device, come the hydraulic pressure of elastic hydraulic pneumatic shuttle or the size of air pressure described in feedback regulation.Specific implementation mechanism refers to following content.
Refer to Fig. 2, what Fig. 2 disclosed is the multistage roller mill of a kind of battery pole piece, comprise surely thick device 1, described fixed thick device 1 comprises the first roll 11 and the second roll 12, between described the first roll 11 and the bearing block at the second roll 12 two ends, being respectively provided with a Ge Tiaofeng mechanism (does not draw, existing conventional Tiao Feng mechanism is a pair of voussoir, by regulating the relative position between two voussoirs, reach to regulate and roll the big or small object of seam, Tiao Feng mechanism is prior art, here repeat no more), hydraulic means 30 acts on described the first roll 11 or/and the two ends of the second roll 12, keep rolling between two rolls to stitch h1 substantially constant, in the present embodiment, the present invention also comprises N prepressing device 2 ... N-1, N, each described prepressing device 2 comprises pony press 21 and a pair of pony press elastic hydraulic pneumatic shuttle 22, between described pony press 21 and described the first roll 11 or the second roll 12, form pre-pressure rolling seam 23, described pony press elastic hydraulic pneumatic shuttle 22 acts on respectively the two ends of described pony press 21, keep the pressure substantially constant of described pony press 21.Battery pole piece 26 is first by prepressing device 2 ... N-1, N, multistage prognosis, the seam h1 that rolls that finally enters surely thick device 1 carries out thickness calibration, generally, the height that rolls seam h1 is equal to or slightly less than battery pole piece final thickness, the height why seam h1 is rolled in selection is slightly less than battery pole piece final thickness, is to rebound after compression for the active material on anti-upper battery pole piece.
Refer to Fig. 3 and Fig. 4, Fig. 3 is the side structure schematic diagram of the three-high mill in embodiment illustrated in fig. 2.Fig. 4 is the plan structure schematic diagram of the three-high mill in embodiment illustrated in fig. 2.That is to say, multistage roller mill shown in Fig. 3 and Fig. 4 is the situation of only having a prepressing device 2, specifically, described three-high mill comprises support 27, on described support 27, be provided with surely thick device 1, described fixed thick device 1 comprises the first roll 11 and the second roll 12, between described the first roll 11 and the bearing block at the second roll 12 two ends, be respectively provided with a Ge Tiaofeng mechanism 13, described Tiao Feng mechanism is a pair of voussoir, regulate the relative position between two voussoirs by stepper motor or servomotor, reach to regulate and roll the big or small object of seam, the two ends that hydraulic means (not shown) acts on described the second roll 12 (certainly, also can be designed to do in the two ends of the first roll 11), keep rolling seam substantially constant between two rolls, described the first roll 11 and the second roll 12 are driven by the first motor 14, also be provided with a prepressing device 2 in a side of described the second roll 12, described prepressing device 2 comprises pony press 21 and a pair of pony press elastic hydraulic pneumatic shuttle 22, between described pony press 21 and the second roll 12, form pre-pressure rolling seam, described pony press elastic hydraulic pneumatic shuttle 22 acts on respectively the two ends of described pony press 21, keep the pressure substantially constant of described pony press 21, described pony press 21 is driven by the second motor 28.
When use, battery pole piece 26 gatings are crossed pre-pressure rolling seam and are carried out the active material on battery pole piece 26 to carry out compacting, then, then carry out thickness correction by the seam that rolls between the first roll 11 and the second roll 12, make the thickness of battery pole piece 26 reach designing requirement.
Refer to Fig. 5, Fig. 5 is the planar structure schematic diagram of the second embodiment of the present invention.The multistage roller mill of a kind of battery pole piece, comprise surely thick device 1, described fixed thick device 1 comprises the first roll 11 and the second roll 12, between described the first roll 11 and the bearing block at the second roll 12 two ends, be respectively provided with a Ge Tiaofeng mechanism (not shown), hydraulic means 30 acts on the two ends of described the first roll 11 or the second roll 12, keep rolling seam substantially constant between two rolls, in the present embodiment, also comprise N prepressing device 2 ... N, each described prepressing device 2 comprises the first pony press 24, the second pony press 25, and a pair of pony press elastic hydraulic pneumatic shuttle 22, between described the first pony press 24 and described the second pony press 25, form pre-pressure rolling seam 23, described pony press elastic hydraulic pneumatic shuttle 22 acts on respectively the two ends of described the first pony press 24 (also can act on the second pony press 25), keep the pressure substantially constant of described the first pony press 24 or the second pony press 25.
The particle integrity that all can adopt following pony press elastic hydraulic pneumatic shuttle 22, pressure detecting closed-loop adjustment device, thickness to detect closed-loop adjustment device and active material layer in above-mentioned each embodiment detects closed-loop adjustment device.
Refer to Fig. 6, Fig. 6 is the structural representation of the pony press elastic hydraulic pneumatic shuttle in the present invention.Described pony press elastic hydraulic pneumatic shuttle 22 comprises cylinder body 221, in described cylinder body 221, be provided with first piston 222 and the second piston 223, push rod 224 is connected with first piston 222, and stretches out in one end of described cylinder body 221, acts on the two ends of described the first pony press 21; Between described first piston 222 and the second piston 223, be air zone 225, described the second piston 223 forms hydraulic pressure district 226 away from the one side of air zone 225 with described cylinder body 221, and described hydraulic pressure district 226 is connected with Hydraulic Station (not shown) by hydraulic inlet 227.The present invention is owing to being provided with air zone 225 between first piston 222 and the second piston 223, like this, described pony press elastic hydraulic pneumatic shuttle 22 is by first compressed air, act on roll by compressed gas, first piston 222 and push rod 224 again, because compressed-air actuated volume has certain telescopicing performance, can play elastic reaction, keep the pressure substantially constant of pony press 21, can play the well compaction of the active material to battery pole piece, and don't cause the curtain coating of active material.Certainly, the pony press elastic hydraulic pneumatic shuttle in the present invention also can be designed to first compressed air part, then by air Partial shrinkage hydraulic part, hydraulic pressure acts on the structure of roll by first piston 222 and push rod 224.Its effect is identical.
Preferably, the present invention also can comprise pressure detecting closed-loop adjustment device, described pressure detecting closed-loop adjustment device comprises pressure transducer, control circuit and mechanical actuating mechanism, described pressure transducer is by detecting the pressure that rolls seam of described prepressing device 2, and by flowing to control circuit after analog-to-digital conversion, described control circuit regulates the hydraulic pressure of described pony press elastic hydraulic pneumatic shuttle 22 or the size of air pressure according to the variation of pressure by described mechanical actuating mechanism.
Preferably, the present invention also can comprise that thickness detects closed-loop adjustment device, described thickness detects closed-loop adjustment device and comprises pole piece thickness measure mechanism and control circuit and executing agency, described pole piece thickness measure mechanism is by detecting the thickness of the battery pole piece after described prepressing device or fixed thick device, and by flowing to control circuit after analog-to-digital conversion, described control circuit comes the hydraulic pressure of elastic hydraulic pneumatic shuttle 22 or the size of air pressure described in feedback regulation according to the variation of pole piece thickness.
Preferably, the present invention also can comprise that the particle integrity of active material layer detects closed-loop adjustment device, described particle integrity detects closed-loop adjustment device and comprises digital camera head and control circuit, described digital camera head or radial imaging are taken the image on the active material layer surface of the battery pole piece after described prepressing device or fixed thick device, flow to control circuit, the image that control circuit obtains shooting compares with pre-standard picture in control circuit, and comes the hydraulic pressure of elastic hydraulic pneumatic shuttle 22 or the size of air pressure described in feedback regulation according to comparative result.
Claims (10)
1. the multistage roller mill of battery pole piece, comprise surely thick device (1), described fixed thick device (1) comprises the first roll (11) and the second roll (12), between described the first roll (11) and the bearing block at the second roll (12) two ends, be respectively provided with a Ge Tiaofeng mechanism, hydraulic means acts on the two ends of described the first roll (11) or the second roll (12), keep rolling seam substantially constant between two rolls, it is characterized in that, also comprise at least one prepressing device (2), each described prepressing device (2) comprises pony press (21) and a pair of pony press elastic hydraulic pneumatic shuttle (22), between described pony press (21) and described the first roll (11) or the second roll (12), form pre-pressure rolling seam (23), described elastic hydraulic pneumatic shuttle (22) acts on respectively the two ends of described pony press (21), keep the pressure substantially constant of described pony press (21).
2. the multistage roller mill of battery pole piece according to claim 1, it is characterized in that, described pony press elastic hydraulic pneumatic shuttle (22) comprises cylinder body (221), in described cylinder body (221), be provided with first piston (222) and the second piston (223), push rod (224) is connected with first piston (222), and stretch out in one end of described cylinder body (221), act on the two ends of described the first pony press (21); Between described first piston (222) and the second piston (223), be air zone (225), described the second piston (223) forms hydraulic pressure district (226) away from the one side of air zone (225) with described cylinder body (221), and described hydraulic pressure district (226) is connected with Hydraulic Station by hydraulic inlet (227).
3. the multistage roller mill of battery pole piece according to claim 1 and 2, it is characterized in that, also comprise pressure detecting closed-loop adjustment device, described pressure detecting closed-loop adjustment device comprises pressure transducer, control circuit and mechanical actuating mechanism, described pressure transducer is by detecting the pressure that rolls seam of described prepressing device (2), and by flowing to control circuit after analog-to-digital conversion, described control circuit regulates the hydraulic pressure of described pony press elastic hydraulic pneumatic shuttle (22) or the size of air pressure according to the variation of pressure by described mechanical actuating mechanism.
4. the multistage roller mill of battery pole piece according to claim 1 and 2, it is characterized in that, also comprise that thickness detects closed-loop adjustment device, described thickness detects closed-loop adjustment device and comprises pole piece thickness measure mechanism and control circuit, described pole piece thickness measure mechanism is by detecting the thickness of the battery pole piece after described prepressing device or fixed thick device, and by flowing to control circuit after analog-to-digital conversion, described control circuit comes the hydraulic pressure of elastic hydraulic pneumatic shuttle (22) described in feedback regulation or the size of air pressure according to the variation of pole piece thickness.
5. the multistage roller mill of battery pole piece according to claim 1 and 2, it is characterized in that, the particle integrity that also comprises active material layer detects closed-loop adjustment device, described particle integrity detects closed-loop adjustment device and comprises digital camera head or radial imaging and control circuit and executing agency, described digital camera head or radial imaging are taken the image on the active material layer surface of the battery pole piece after described prepressing device or fixed thick device, flow to control circuit, the image that control circuit obtains shooting compares with pre-standard picture in control circuit, and come the hydraulic pressure of elastic hydraulic pneumatic shuttle (22) described in feedback regulation or the size of air pressure according to comparative result.
6. the multistage roller mill of battery pole piece, comprise surely thick device (1), described fixed thick device (1) comprises the first roll (11) and the second roll (12), between described the first roll (11) and the bearing block at the second roll (12) two ends, be respectively provided with a Ge Tiaofeng mechanism, hydraulic means acts on the two ends of described the first roll (11) or the second roll (12), keep rolling seam substantially constant between two rolls, it is characterized in that, also comprise at least one prepressing device (2), each described prepressing device (2) comprises the first pony press (24), the second pony press (25), and a pair of pony press elastic hydraulic pneumatic shuttle (22), between described the first pony press (24) and described the second pony press (25), form pre-pressure rolling seam (23), described pony press elastic hydraulic pneumatic shuttle (22) acts on respectively the two ends of described the first pony press (24) or the second pony press (25), keep the pressure substantially constant of described the first pony press (24) or the second pony press (25).
7. the multistage roller mill of battery pole piece according to claim 6, it is characterized in that, described pony press elastic hydraulic pneumatic shuttle (22) comprises cylinder body (221), in described cylinder body (221), be provided with first piston (222) and the second piston (223), push rod (224) is connected with first piston (222), and stretch out in one end of described cylinder body (221), act on the two ends of described the first pony press (21); Between described first piston (222) and the second piston (223), be air zone (225), described the second piston (223) forms hydraulic pressure district (226) away from the one side of air zone (225) with described cylinder body (221), and described hydraulic pressure district (226) is connected with Hydraulic Station by hydraulic inlet (227).
8. according to the multistage roller mill of the battery pole piece described in claim 6 or 7, it is characterized in that, also comprise pressure detecting closed-loop adjustment device, described pressure detecting closed-loop adjustment device comprises pressure transducer and control circuit, described pressure transducer is by detecting the pressure that rolls seam of described prepressing device (2), and by flowing to control circuit after analog-to-digital conversion, described control circuit regulates the hydraulic pressure of described pony press elastic hydraulic pneumatic shuttle (22) or the size of air pressure according to the variation of pressure.
9. according to the multistage roller mill of the battery pole piece described in claim 6 or 7, it is characterized in that, also comprise that thickness detects closed-loop adjustment device, described thickness detects closed-loop adjustment device and comprises pole piece thickness measure mechanism and control circuit, described pole piece thickness measure mechanism is by detecting the thickness of the battery pole piece after described prepressing device or fixed thick device, and by flowing to control circuit after analog-to-digital conversion, described control circuit comes the hydraulic pressure of elastic hydraulic pneumatic shuttle (22) described in feedback regulation or the size of air pressure according to the variation of pole piece thickness.
10. according to the multistage roller mill of the battery pole piece described in claim 6 or 7, it is characterized in that, the particle integrity that also comprises active material layer detects closed-loop adjustment device, described particle integrity detects closed-loop adjustment device and comprises digital camera head and control circuit, described digital camera head or radial imaging are taken the image on the active material layer surface of the battery pole piece after described prepressing device or fixed thick device, flow to control circuit, the image that control circuit obtains shooting compares with pre-standard picture in control circuit, and come the hydraulic pressure of elastic hydraulic pneumatic shuttle (22) described in feedback regulation or the size of air pressure according to comparative result.
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| CN201410187567.4A CN103934285B (en) | 2014-05-06 | 2014-05-06 | Battery pole piece pressure rolling method and multistage roller mill thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393229A (en) * | 2014-07-31 | 2015-03-04 | 中天储能科技有限公司 | Automatic control system and control method for compaction density of pole piece |
| CN104795530A (en) * | 2015-02-03 | 2015-07-22 | 重庆师范大学 | Silver zinc battery positive electrode silver sheet automatic pressing system |
| CN105414202A (en) * | 2015-12-30 | 2016-03-23 | 邢台海裕锂能电池设备有限公司 | Rolling mill and rolling system capable of realizing online clearance adjustment |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2834722Y (en) * | 2005-09-30 | 2006-11-08 | 邢台纳科诺尔极片轧制设备有限公司 | Clearance adjustment device for battery pole plate rolling mill |
| CN2870185Y (en) * | 2005-11-30 | 2007-02-14 | 北京海裕百特电池成套设备有限公司 | Device for rolling cell polar-piece roller support |
| US20120246917A1 (en) * | 2011-04-01 | 2012-10-04 | Ihi Corporation | Continuous press apparatus for electrode band plate |
| JP2013111647A (en) * | 2011-12-01 | 2013-06-10 | Hitachi Engineering & Services Co Ltd | Roll press equipment |
| CN203862696U (en) * | 2014-05-06 | 2014-10-08 | 深圳市信宇人科技有限公司 | Battery pole piece multistage rolling machine |
-
2014
- 2014-05-06 CN CN201410187567.4A patent/CN103934285B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2834722Y (en) * | 2005-09-30 | 2006-11-08 | 邢台纳科诺尔极片轧制设备有限公司 | Clearance adjustment device for battery pole plate rolling mill |
| CN2870185Y (en) * | 2005-11-30 | 2007-02-14 | 北京海裕百特电池成套设备有限公司 | Device for rolling cell polar-piece roller support |
| US20120246917A1 (en) * | 2011-04-01 | 2012-10-04 | Ihi Corporation | Continuous press apparatus for electrode band plate |
| JP2013111647A (en) * | 2011-12-01 | 2013-06-10 | Hitachi Engineering & Services Co Ltd | Roll press equipment |
| CN203862696U (en) * | 2014-05-06 | 2014-10-08 | 深圳市信宇人科技有限公司 | Battery pole piece multistage rolling machine |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393229A (en) * | 2014-07-31 | 2015-03-04 | 中天储能科技有限公司 | Automatic control system and control method for compaction density of pole piece |
| CN104393229B (en) * | 2014-07-31 | 2016-08-24 | 中天储能科技有限公司 | A kind of compacted density automatic control system and control method |
| CN104795530A (en) * | 2015-02-03 | 2015-07-22 | 重庆师范大学 | Silver zinc battery positive electrode silver sheet automatic pressing system |
| CN104795530B (en) * | 2015-02-03 | 2017-04-05 | 重庆师范大学 | A kind of automatic compact system of smee cell positive pole silver strip |
| CN105414202A (en) * | 2015-12-30 | 2016-03-23 | 邢台海裕锂能电池设备有限公司 | Rolling mill and rolling system capable of realizing online clearance adjustment |
| CN106001130A (en) * | 2016-06-02 | 2016-10-12 | 广东基泰智能设备有限公司 | Lithium strip temperature control calendering device |
| CN106001130B (en) * | 2016-06-02 | 2017-09-15 | 广东基泰智能设备有限公司 | Lithium band temperature control calender device |
| CN106586634A (en) * | 2016-10-26 | 2017-04-26 | 广州中国科学院工业技术研究院 | Material strap conveying cutting device |
| CN106586634B (en) * | 2016-10-26 | 2019-04-19 | 广州中国科学院工业技术研究院 | Material strip feeding cutter device |
| CN110404980A (en) * | 2019-07-24 | 2019-11-05 | 深圳市信宇人科技股份有限公司 | Novel no extension precision rollers machine |
| WO2021012773A1 (en) * | 2019-07-24 | 2021-01-28 | 深圳市信宇人科技股份有限公司 | Novel non-stretching precise roller press |
| CN111477834A (en) * | 2020-04-23 | 2020-07-31 | 佛山市金银河智能装备股份有限公司 | Battery pole piece rolling device and method |
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Address after: Longgang District of Shenzhen City, Guangdong province 518000 Dragon Street Huilong Po community hoffen (Longgang) Industrial Area No. 2 plant floor, two floor, third floor, four floor Patentee after: Shenzhen xinyuren Polytron Technologies Inc Address before: Lu Hongfeng Industrial Zone No. 38 Hui Pu Cun Longgang District of Shenzhen City, Guangdong Province, No. 1 518000 Patentee before: Shenzhen Xinyuren Technology Co., Ltd. |
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Denomination of invention: Battery pole piece rolling method and battery pole piece multistage roller machine Effective date of registration: 20190410 Granted publication date: 20160127 Pledgee: Bank of Beijing Limited by Share Ltd Shenzhen branch Pledgor: Shenzhen xinyuren Polytron Technologies Inc Registration number: 2019990000315 |
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Date of cancellation: 20200722 Granted publication date: 20160127 Pledgee: Bank of Beijing Limited by Share Ltd. Shenzhen branch Pledgor: SHENZHEN XINYUREN TECHNOLOGY Co.,Ltd. Registration number: 2019990000315 |