CN114976288A

CN114976288A - Battery cell structure with support core and winding equipment thereof

Info

Publication number: CN114976288A
Application number: CN202210754597.3A
Authority: CN
Inventors: 董晓龙; 李曼琳
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-08-30

Abstract

The invention discloses a battery cell structure with a support core and winding equipment thereof, wherein the battery cell structure comprises a naked battery cell, the naked battery cell comprises a positive plate, a negative plate and a diaphragm for winding and compounding the positive plate and the negative plate, the center of the inner layer of the diaphragm is provided with the support core, and the diaphragm and the support core are arranged in an integrated structure. The invention thoroughly avoids the clearance between the positive and negative pole pieces formed by the winding electric core because the inner ring is not supported, thereby avoiding the risk of lithium precipitation and battery ignition caused by the clearance; the risk that the diaphragm is separated when the battery core and the winding needle are separated is thoroughly solved; the problem of electrode lug dislocation caused by the diameter deviation of the winding needle is thoroughly solved; the problem of higher equipment complexity caused by the use of an inner ring rubberizing process is avoided; the support core is convenient to feed; and the battery cores with different sizes are simple to change types.

Description

Battery cell structure with support core and winding equipment thereof

Technical Field

The invention relates to the field of structures of automobile power lithium batteries, energy storage lithium batteries or sodium batteries, in particular to a battery cell structure with a support core and winding equipment thereof.

Background

The battery cell structure of the automobile power lithium battery is divided into a laminated battery cell and a winding battery cell according to different processing technologies, and the winding battery cell is still the mainstream at present. The current electric core of coiling has two inherent defects, one is that the coiling is accomplished and is rolled up the needle and extract, carries out hot pressing or colds pressing the back, and several layers of positive and negative pole pieces and the diaphragm that lean on the center can form great clearance in the corner of electric core owing to lose the support, and the clearance between the positive and negative pole piece can lead to producing the risk of analysing lithium when charging, and lithium dendrite grows gradually, can lead to impaling the diaphragm to further lead to the risk of thermal runaway. The current solutions mainly include two solutions, one is that the negative electrode sheet is wound for more than one circle at the beginning, but cannot form effective support; the other method is to paste glue at the corners of the first circle of positive plates, but the paste glue causes the equipment to be complicated, and only the first layer forms the positive and negative plate isolation, which can not completely avoid the risk of the clearance between the positive and negative plates. The inherent defect of the second winding battery cell is that when the winding is completed and the winding needle is pulled out from the bare battery cell, the diaphragm of the inner ring is taken out along with the winding needle, so that the defect is caused. Except the inherent defect of the electric core, the current winding electric core needs to pass through the winding needle due to the fact that the diaphragm needs to be clamped by the winding needle, the winding needle needs to be tensioned outwards, the whole winding needle is designed, a supporting mechanism at the tail end of the winding needle is complex, and the mechanism and the control of equipment are complex.

Disclosure of Invention

The invention mainly solves the technical problem of providing a battery cell structure with a support core and winding equipment thereof, which thoroughly avoid the clearance between a positive pole piece and a negative pole piece of a winding battery cell, which is formed by the fact that an inner ring is not supported, thereby avoiding the risk of lithium precipitation and battery ignition caused by the clearance; the risk that the diaphragm is separated when the battery core and the winding needle are separated is thoroughly solved; the problem of electrode lug dislocation caused by the diameter deviation of the winding needle is thoroughly solved; the problem of higher equipment complexity caused by the use of an inner ring rubberizing process is avoided; the support core is convenient to feed; and the battery cores with different sizes are simple to change the models.

In order to solve the technical problems, the invention adopts a technical scheme that: the utility model provides an electric core structure of kernel is supported in area, includes naked electric core, naked electric core includes positive plate, negative pole piece and positive negative plate and winds the complex diaphragm, the inlayer center of diaphragm is provided with one and supports the kernel, just the diaphragm sets up with supporting kernel formula structure as an organic whole.

In a preferred embodiment of the present invention, the support core is disposed in a racetrack structure, has a thickness of 20 to 200 μm, and is made of PP, PE or PET.

In a preferred embodiment of the invention, the membrane and the support core are formed as a one-piece structure by heat fusion or ultrasonic welding, preferably ultrasonic welding.

The utility model provides a be applied to take and support coiling equipment of electric core structure of kernel, include frame, feed bin, pushing equipment, unloading mechanism, side shift mechanism, feeding mechanism, lifting mechanism, ultrasonic bonding mechanism and around rolling up the mechanism, the feed bin transversely sets up in the frame top through the mount pad, feed bin unloading side lower part is provided with longitudinal distribution's lower silo, pushing equipment sets up on the feed bin, unloading mechanism sets up in the unloading side of feed bin, side shift mechanism sets up in unloading mechanism below one side, feeding mechanism sets up in side shift mechanism both sides with lifting mechanism relatively, around rolling up the mechanism and setting up in lifting mechanism top, ultrasonic bonding mechanism sets up in around rolling up mechanism one side.

In a preferred embodiment of the present invention, the material pushing mechanisms are provided with two sets, each of the two sets includes a first material pushing mechanism and a second material pushing mechanism, the first material pushing mechanism includes a first servo module, a first rodless cylinder and a first material pushing arm, the second material pushing mechanism includes a second servo module, a second rodless cylinder and a second material pushing arm, the first servo module and the second servo module are arranged at the top and the bottom of the bin in parallel, the first rodless cylinder and the second rodless cylinder are arranged in parallel and transversely on the same side of the first servo module and the second servo module respectively, the first material pushing arm is arranged at the driving end of the lower portion of the first rodless cylinder and located in the bin, and the second material pushing arm is arranged at the driving end of the upper portion of the second rodless cylinder and located in the bin.

In a preferred embodiment of the present invention, the discharging mechanism includes a first discharging cylinder, a second discharging cylinder and a discharging rod, the first discharging cylinder is longitudinally fixed at one side of the storage bin, the second discharging cylinder is vertically arranged at the driving end of the first discharging cylinder, and the driving end of the second discharging cylinder is provided with the discharging rod facing the discharging slot.

In a preferred embodiment of the invention, the side-shifting mechanism comprises a blanking platform, a first lead screw module, a push plate and a baffle plate, wherein the blanking platform is transversely fixed on a mounting seat below a blanking groove, a guide groove which penetrates through the blanking platform from top to bottom is arranged on the blanking platform in parallel, the first lead screw module is transversely arranged below the blanking platform and is arranged in parallel with the guide groove, a positioning plate which penetrates through the guide groove and is positioned above the blanking platform is arranged at the driving end of the first lead screw module, the push plate which is longitudinally distributed is fixedly arranged on the positioning plate, and the baffle plate which is parallel to the push plate is arranged on the edge side of the blanking platform.

In a preferred embodiment of the present invention, the feeding mechanism is disposed on one side of the mounting seat, and includes a second lead screw module and a pushing claw, the second lead screw module is laterally distributed and vertically disposed with respect to the first lead screw module, the driving end of the second lead screw module is laterally provided with the pushing claw which moves in the same direction in parallel, and the pushing claw is located above the blanking platform and disposed corresponding to the inner side of the baffle.

In a preferred embodiment of the invention, the lifting mechanism comprises a positioning plate, a rotation positioning seat, a slide rail, a rubber suction nozzle, a positioning shaft, a servo motor and a shifting fork, wherein the positioning plate is longitudinally distributed and arranged in parallel with the baffle plate, the center of the rotation positioning seat is arranged on a vertex angle of the positioning plate on one side of the baffle plate through a rotating shaft, the positioning plate is clockwise provided with a C-shaped track which is transversely and longitudinally flushed with the rotation positioning seat, the slide rail is slidably arranged on the rotation positioning seat, the rubber suction nozzle is arranged on one side of the baffle plate, the positioning shaft in the C-shaped track is vertically arranged on the other side of the baffle plate, the servo motor is vertically arranged on the inner side of the C-shaped track of the positioning plate, the driving end of the servo motor penetrates through the positioning plate and is provided with the shifting fork which is parallel to the positioning plate, and a clamping groove which is concavely arranged at the movable end of the shifting fork correspondingly clamps the positioning shaft.

The invention has the beneficial effects that: according to the cell structure with the support core and the winding equipment thereof, the clearance between the positive pole piece and the negative pole piece formed by the winding cell without the support of the inner ring is completely eliminated, so that the risks of lithium precipitation and battery ignition caused by the clearance are avoided; the risk that the diaphragm is separated when the battery core and the winding needle are separated is thoroughly solved; the problem of electrode lug dislocation caused by the diameter deviation of the winding needle is thoroughly solved; the problem of higher equipment complexity caused by the use of an inner ring rubberizing process is avoided; the support core is convenient to feed; and the battery cores with different sizes are simple to change types.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

fig. 1 is a schematic structural diagram of a separator and a support core of a preferred embodiment of a cell structure with a support core and a winding device thereof according to the present invention;

fig. 2 is a perspective view of a winding apparatus according to a preferred embodiment of the cell structure with a support core and the winding apparatus thereof of the present invention;

fig. 3 is a perspective view of the installation position of the feeding mechanism of a preferred embodiment of the cell structure with the support core and the winding device thereof according to the invention;

FIG. 4 is a front view of FIG. 3;

fig. 5 is a perspective view of a feeding mechanism of a preferred embodiment of a cell structure with a support core and a winding device thereof according to the present invention;

fig. 6 is a perspective view of a cell structure with a support core and a lifting mechanism of a preferred embodiment of the winding apparatus of the cell structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, an embodiment of the present invention includes:

the utility model provides an electric core structure and coiling equipment that kernel is supported in area, includes naked electric core, naked electric core includes positive plate, negative pole piece and positive negative pole piece winding complex diaphragm 1, the inlayer center of diaphragm 1 is provided with one and supports kernel 2, just diaphragm 1 forms the integral type structure with supporting kernel 2 and adopting ultrasonic bonding, it is the runway shape structure setting to support kernel 2, and thickness is 20~200 mu m, and the material is PP, PE, PET or similar material to after colding pressing or hot pressing, to diaphragm 1 and positive negative pole piece formation an effectual support, avoid positive negative pole piece at the clearance that the inner circle formed. In addition, when the naked electric core is separated from the winding needle, the diaphragm 1 is isolated by the supporting inner core 2 and the winding needle, so that the risk that the diaphragm 1 is taken out along with the winding needle is avoided.

Referring to fig. 2-6, an embodiment of the present invention includes: the utility model provides a be applied to coiling equipment of electric core structure of taking support kernel, includes frame 3, feed bin 4, pushing equipment, unloading mechanism, side mechanism, feeding mechanism, lifting mechanism, ultrasonic welding mechanism 5 and around rolling up mechanism 6.

Wherein, feed bin 4 transversely sets up in frame 3 top through mount pad 7, puts into 100 support kernels 2 in the feed bin 4 every time. And the lower part of the discharging side of the stock bin 4 is provided with a discharging groove 8 which is longitudinally distributed and used for realizing the discharging of 1 supporting inner core 2.

The pushing mechanism (manipulator) is arranged on the stock bin 4 and used for continuously pushing the support inner core 2 to advance.

The material pushing mechanism is provided with two groups and comprises a first material pushing mechanism and a second material pushing mechanism, the first material pushing mechanism comprises a first servo module 9, a first rodless cylinder 10 and a first material pushing arm 11, and the second material pushing mechanism comprises a second servo module 12, a second rodless cylinder 13 and a second material pushing arm 14.

The first servo module 9 and the second servo module 12 are arranged at the top and the bottom of the silo 4 in parallel and are used for driving along the feeding direction of the silo 4. First no pole cylinder 10 and the horizontal parallel arrangement of second no pole cylinder 13 homonymy set up perpendicularly respectively on first servo module 9 and second servo module 12, and are located feed bin 4 both sides, first material pushing arm 11 sets up in the drive end of first no pole cylinder 10 lower part and is located feed bin 4, second material pushing arm 14 sets up in the drive end on second no pole cylinder 13 upper portion and is located feed bin 4, and first material pushing arm 11 drives 100 support kernels 2 and advances, and second material pushing arm 14 returns the end and waits to put into next batch of support kernels 2.

The blanking mechanism is arranged on the blanking side of the stock bin 4 and comprises a first blanking cylinder 15, a second blanking cylinder 16 and a blanking rod 17.

Wherein, the first blanking cylinder 15 is longitudinally fixed on one side of the storage bin 4 and used for driving longitudinal movement. The second blanking air cylinder 16 is vertically arranged at the driving end of the first blanking air cylinder 15, the driving end of the second blanking air cylinder 16 is provided with a blanking rod 17 facing the blanking groove 8, the second blanking air cylinder 16 drives the blanking rod 17 to be inserted into the blanking groove 8 and driven to descend by the first blanking air cylinder 15, and 1 support core 2 is blanked by the blanking groove 8.

The side shift mechanism comprises a blanking platform 18, a first screw rod module 19, a push plate 20 and a baffle 21.

The blanking platform 18 is transversely fixed on the mounting seat 7 below the blanking groove 8 and used for receiving the supporting core 2 for blanking. The guide way 22 that runs through from top to bottom of parallel arrangement on unloading platform 18, first lead screw module 19 transversely sets up in unloading platform 18 below and with guide way 22 parallel arrangement, the drive end of first lead screw module 19 is provided with passes the locating plate 23 that guide way 22 is located unloading platform 18 top, fixed push pedal 20 that is provided with longitudinal distribution on the locating plate 23, the border side of unloading platform 18 is provided with the baffle 21 parallel with push pedal 20, will support kernel 2 through first lead screw module 19 drive push pedal 20 and send to baffle 21 one side.

The feeding mechanism and the lifting mechanism are oppositely arranged on two sides of the side shifting mechanism, and the support kernel 2 is conveyed to one side of the lifting mechanism through the feeding mechanism to be adsorbed and fixed.

The feeding mechanism is arranged on one side of the mounting seat 7 and comprises a second screw rod module 24 and a push claw 25.

The second screw rod modules 24 are transversely distributed and are perpendicular to the first screw rod modules 19, push claws 25 which move in the same direction are transversely arranged at the driving ends of the second screw rod modules 24 in parallel, the push claws 25 are located above the blanking platform 18 and are arranged corresponding to the inner sides of the baffles 21, and the support cores 2 are conveyed to one side of the lifting mechanism on the blanking platform 18 through the second screw rod modules 24 by driving the push claws 25 through the second screw rod modules 24, so that the adsorption and fixation are facilitated.

The lifting mechanism comprises a positioning plate 26, a rotary positioning seat 27, a slide rail 28, a rubber suction nozzle 29, a positioning shaft 30, a servo motor 31 and a shifting fork 32.

The positioning plate 26 is longitudinally distributed and parallel to the baffle plate 21, and the center of the rotary positioning seat 27 is arranged on the vertex angle of the positioning plate 26 on one side of the baffle plate 21 through a rotating shaft, so that the rotary positioning seat can rotate at any angle, and the turning positioning function is realized. The positioning plate 26 is clockwise provided with a C-shaped track 33 which is horizontally and longitudinally flush with the rotary positioning seat 27, the slide rail 28 is arranged on the rotary positioning seat 27 in a sliding manner, one side of the baffle plate 21 is provided with a rubber suction nozzle 29, the support core 2 is fixed by vacuum adsorption through the rubber suction nozzle 29, the other side is vertically provided with a positioning shaft 30 positioned in a C-shaped track 33, the servo motor 31 is vertically arranged at the inner side of a C-shaped rail 33 of the positioning plate 26, a shifting fork 32 parallel to the positioning plate 26 is arranged at the driving end of the servo motor through the positioning plate 26, a clamping groove 34 which is concavely arranged at the movable end of the shifting fork 32 correspondingly clamps the positioning shaft 30, the servo motor 31 drives the shifting fork 32 to drive the positioning shaft 30 to move along a C-shaped track 33 and is driven from the end part of the transverse end to the end part of the longitudinal end, thereby driving the slide rail 28 to change from transverse movement to longitudinal movement, and realizing the upward movement, lifting and feeding of one end of the rubber suction nozzle 29 of the slide rail 28.

The winding mechanism 6 (existing product) is arranged above the lifting mechanism, the winding needle of the winding mechanism is internally provided with an inflatable structure, the diameter can be changed through an air bag, the proper tension force for supporting the inner core is adjusted through controlling air pressure, the winding needle is stretched out, the winding needle adopts the proper tension force to fixedly support the inner core 2, the diameter of the winding needle and the supporting inner core 2 follow up, and the problem of electrode lug dislocation caused by the diameter variation of the winding needle is effectively solved.

The ultrasonic welding mechanism 5 (existing product) is arranged on one side of the winding mechanism 6, and the diaphragm 1 and the support core 2 are welded together by adopting ultrasonic waves, so that a complex film clamping structure of a winding needle is avoided.

In conclusion, the cell structure with the support core and the winding equipment thereof thoroughly avoid the clearance between the positive and negative pole pieces of the winding cell, which is formed because the inner ring is not supported, so that the risks of lithium precipitation and battery ignition caused by the clearance are avoided; the risk that the diaphragm is separated when the battery core and the winding needle are separated is thoroughly solved; the problem of electrode lug dislocation caused by the diameter deviation of the winding needle is thoroughly solved; the problem of higher equipment complexity caused by the use of an inner ring rubberizing process is avoided; the support core is convenient to feed; and the battery cores with different sizes are simple to change types.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides an electric core structure of kernel is supported in area, includes naked electric core, naked electric core includes positive plate, negative pole piece and positive negative plate and winds the compound diaphragm that uses, its characterized in that, the inlayer center of diaphragm is provided with one and supports the kernel, just the diaphragm sets up with supporting kernel formula structure as an organic whole.

2. The cell core structure with the support inner core according to claim 1, wherein the support inner core is arranged in a racetrack structure, has a thickness of 20-200 μm, and is made of PP, PE or PET.

3. The cell structure with a support core according to claim 2, wherein the membrane and the support core are formed into an integral structure by hot melt welding or ultrasonic welding, preferably ultrasonic welding.

4. The winding device with the battery cell structure provided with the support core is applied to the winding device with the support core, and is characterized by comprising a rack, a bin, a pushing mechanism, a discharging mechanism, a side-shifting mechanism, a feeding mechanism, a lifting mechanism, an ultrasonic welding mechanism and a winding mechanism, wherein the bin is transversely arranged above the rack through a mounting seat, a discharging groove which is longitudinally distributed is formed in the lower part of the discharging side of the bin, the pushing mechanism is arranged on the bin, the discharging mechanism is arranged on the discharging side of the bin, the side-shifting mechanism is arranged on one side below the discharging mechanism, the feeding mechanism and the lifting mechanism are oppositely arranged on two sides of the side-shifting mechanism, the winding mechanism is arranged above the lifting mechanism, and the ultrasonic welding mechanism is arranged on one side of the winding mechanism.

5. The cell structure with the support core and the winding device thereof according to claim 4, the material pushing mechanisms are provided with two groups and comprise a first material pushing mechanism and a second material pushing mechanism, the first material pushing mechanism comprises a first servo module, a first rodless cylinder and a first material pushing arm, the second material pushing mechanism comprises a second servo module, a second rodless cylinder and a second material pushing arm, the first servo module and the second servo module are arranged at the top and the bottom of the storage bin in parallel, the first rodless cylinder and the second rodless cylinder are arranged in parallel at the same side in the transverse direction and are respectively and vertically arranged on the first servo module and the second servo module, the first pushing arm is arranged at the driving end of the lower portion of the first rodless cylinder and is positioned in the storage bin, and the second pushing arm is arranged at the driving end of the upper portion of the second rodless cylinder and is positioned in the storage bin.

6. The battery cell structure with the support core and the winding device of the battery cell structure with the support core according to claim 5, wherein the blanking mechanism comprises a first blanking cylinder, a second blanking cylinder and a blanking rod, the first blanking cylinder is longitudinally fixed on one side of the storage bin, the second blanking cylinder is vertically arranged at the driving end of the first blanking cylinder, and the driving end of the second blanking cylinder is provided with the blanking rod facing the blanking slot.

7. The electric core structure with the support core and the winding device of the electric core structure with the support core according to claim 6, wherein the lateral movement mechanism comprises a blanking platform, a first lead screw module, a push plate and a baffle plate, the blanking platform is transversely fixed on the mounting seat below the blanking groove, guide grooves penetrating through the blanking platform are arranged on the blanking platform in parallel, the first lead screw module is transversely arranged below the blanking platform and is parallel to the guide grooves, a positioning plate penetrating through the guide grooves and located above the blanking platform is arranged at the driving end of the first lead screw module, the push plate is fixedly arranged on the positioning plate in a longitudinal distribution mode, and the baffle plate parallel to the push plate is arranged on the edge side of the blanking platform.

8. The battery cell structure with the support core and the winding device of the battery cell structure with the support core according to claim 7, wherein the feeding mechanism is arranged on one side of the mounting seat and comprises a second lead screw module and a pushing claw, the second lead screw module is transversely distributed and is vertically arranged with the first lead screw module, the driving end of the second lead screw module is transversely provided with the pushing claw which moves in the same direction in parallel, and the pushing claw is positioned above the blanking platform and is correspondingly arranged with the inner side of the baffle.

9. The cell structure with a support core and the winding device thereof according to claim 8, the lifting mechanism comprises a positioning plate, a rotary positioning seat, a slide rail, a rubber suction nozzle, a positioning shaft, a servo motor and a shifting fork, the positioning plates are longitudinally distributed and arranged in parallel with the baffle plate, the centers of the rotary positioning seats are arranged on the top corners of the positioning plates on one sides of the baffle plate through rotating shafts, the positioning plate is clockwise provided with a C-shaped track which is horizontally and longitudinally aligned with the rotary positioning seat, the slide rail is arranged on the rotary positioning seat in a sliding way, one side of the baffle is provided with a rubber suction nozzle, the other side of the baffle is vertically provided with a positioning shaft positioned in the C-shaped track, the servo motor is vertically arranged on the inner side of a C-shaped track of the positioning plate, a driving end of the servo motor penetrates through the positioning plate to be provided with a shifting fork parallel to the positioning plate, and a clamping groove which is concavely arranged at a movable end of the shifting fork correspondingly clamps the positioning shaft.