阅读说明：本技术 一种锂电池电芯用成型装置及成型方法 (Forming device and forming method for lithium battery core ) 是由 李桂洪 刘恩新 周伟 朱一虎 何学祥 于 2021-08-03 设计创作，主要内容包括：本发明公开了一种锂电池电芯用成型装置及成型方法,该成型装置包括本体、下压辊、上压辊以及升降装置,所述升降装置包括设于上压辊两端的支架、设于上压辊两端的环形架、设于支架内的第一空腔、设于第一空腔内部多个倾斜设置的支撑板、设于支撑板上的第一支撑部件、设于上压辊上方和下方的第二支撑部件、用于带动上压辊升降的驱动部件及设于上压辊两侧的侧拉部件,本发明通过设置本体、下压辊、上压辊和升降装置的配合使用,能够对电芯进行冷压成型,能够根据电芯的厚度进行辊距调节,而且调节的精度较大,避免出现成型误差过大的问题,解决了现有的锂电池电芯成型设备对辊距的调节误差较大,不能根据电芯的厚度进行调节的问题。(The invention discloses a forming device and a forming method for a lithium battery cell, the forming device comprises a body, a lower compression roller, an upper compression roller and a lifting device, the lifting device comprises brackets arranged at two ends of the upper compression roller, annular frames arranged at two ends of the upper compression roller, a first cavity arranged in the brackets, a plurality of obliquely arranged support plates arranged in the first cavity, a first support part arranged on the support plates, a second support part arranged above and below the upper compression roller, a driving part for driving the upper compression roller to lift and a side pulling part arranged at two sides of the upper compression roller, the invention can carry out cold press forming on the cell by matching the body, the lower compression roller, the upper compression roller and the lifting device, can carry out roll pitch adjustment according to the thickness of the cell, has higher adjustment precision, avoids the problem of overlarge forming error, and solves the problem that the existing lithium battery cell forming equipment has larger adjustment error on the roll pitch, the adjustment can not be carried out according to the thickness of the battery core.)

1. The utility model provides a forming device for lithium cell electricity core, includes body (1), locates lower compression roller (2) on body (1), goes up compression roller (3) and is used for adjusting down the elevating gear of roll spacing between compression roller (2) and last compression roller (3) with lower compression roller (2) matched with, its characterized in that: the lifting device comprises supports (41) arranged at two ends of the upper press roller (3), annular frames (42) arranged at two ends of the upper press roller (3), a first cavity (43) arranged in the supports (41), a support plate (44) arranged in the first cavity (43) and provided with a plurality of inclined inner parts, a first support part arranged on the support plate (44), a second support part arranged above and below the upper press roller (3), a driving part used for driving the upper press roller (3) to lift and a side pulling part arranged at two sides of the upper press roller (3), and the annular frames (42) are connected with the upper press roller (3) through bearings.

2. The molding apparatus for lithium battery cells of claim 1, wherein: the first supporting component comprises a second cavity (451) arranged in the supporting plate (44), a sliding plate (452) arranged in the second cavity (451), a first spring (453) matched with the sliding plate (452), a butt rod (454) connected with the sliding plate (452), a clamping plate (455) hinged to the tail end of the butt rod (454) and a fine adjustment component for fine adjustment of the angle of the clamping plate (455), wherein the clamping plate (455) is partially arranged on the outer side of the annular frame (42).

3. The molding device for lithium battery cells of claim 2, wherein: the fine adjustment component comprises a connecting rod (4561) hinged with the clamping plate (455), first sliding grooves (4562) formed in two sides of the abutting rod (454), first sliding blocks (4563) arranged in the first sliding grooves (4562), first guide rods (4564) used for guiding the first sliding blocks (4563) and second springs (4565) arranged in the first sliding grooves (4562).

4. The molding device and the molding method for the lithium battery cell of claim 1, wherein: the second supporting part comprises a supporting block (461), a second sliding groove (462) arranged in the supporting block (461), a second sliding block (463) arranged in the second sliding groove (462), a second guide rod (464) used for guiding the second sliding block (463), a push rod (465) sleeved on the second guide rod (464), and a third spring (466) arranged between the second sliding block (463) and the push rod (465).

5. The molding apparatus for lithium battery cells of claim 1, wherein: the driving component comprises two driving rods (471) which are hinged to each other, a fixing shaft (472) connected with the two driving rods (471), a third sliding block (473) arranged at the bottom end of the driving rods (471), a third sliding groove (474) used for sliding the third sliding block (473), a bidirectional screw (475) used for driving the two third sliding blocks (473) to synchronously move and a motor (476) connected with the bidirectional screw (475), the top end of each driving rod (471) is hinged to the corresponding sliding plate (452), and the fixing shaft (472) is connected with the corresponding second sliding block (463).

6. The molding apparatus for lithium battery cells of claim 1, wherein: the side pull component comprises a fourth sliding groove (481) arranged on two sides of the first cavity (43), a fourth sliding block (482) arranged in the fourth sliding groove (481), a third guide rod (483) used for guiding the fourth sliding block (482), a pull rod (484) hinged to the fourth sliding block (482) and a fourth spring (485) arranged on two sides of the fourth sliding block (482), and the pull rod (484) is hinged to the sliding plate (452).

7. The molding apparatus for lithium battery cells of claim 5, wherein: the bidirectional screw (475) comprises a first threaded part (51) and a second threaded part (52), the first threaded part (51) and the second threaded part (52) are opposite in spiral direction, and the two third sliding blocks (474) are respectively in threaded connection with the first threaded part (51) and the second threaded part (52).

8. The molding device for lithium battery cells of claim 2, wherein: the clamping plate (455) is internally provided with a plurality of convex strips (61) used for increasing friction with the annular frame (42), the convex strips are provided with inclined parts (62), and the height of each inclined part (62) is gradually reduced towards two sides of the first cavity (43).

9. A cell forming method of the forming apparatus for a lithium battery cell according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:

s1, placing the laminated battery cell between the upper pressing roller (3) and the lower pressing roller (2) and determining the thickness information of the battery cell;

s2, determining distance information between the lower pressing roller (2) and the upper pressing roller (3);

s3, determining the position information of the upper pressing roller (3) to be adjusted according to the thickness information;

s4, determining the rotation time and the rotation speed information of the motor (476) according to the position information;

and S5, starting the motor (476), and when the rotating speed and the time of the motor (476) meet the requirements according to the step S4, turning off the motor (476), and controlling the upper press roll (3) and the lower press roll (2) to carry out cold press molding on the electric core.

Technical Field

The invention belongs to the technical field of lithium batteries, and particularly relates to a forming device and a forming method for a lithium battery core.

Background

The application of lithium cell is increasingly extensive, and electric core is the core element of lithium cell, and current lithium cell electricity core adopts lamination technology production more, need carry out press forming to multilayer electric core subassembly after the lamination, and the problem that prior art exists is: the existing lithium battery core forming equipment has large adjustment error of the roller distance and can not be adjusted according to the thickness of a battery core.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a forming device and a forming method for a lithium battery core, which have the advantages that the core can be subjected to cold press forming, the roller distance can be adjusted according to the thickness of the core, the adjusting precision is high, the problem of overlarge forming error is avoided, and the problem that the roller distance adjusting error of the existing lithium battery core forming equipment is large and the adjustment cannot be carried out according to the thickness of the core is solved.

The invention is realized in such a way that the forming device for the lithium battery cell comprises a body, a lower compression roller arranged on the body, an upper compression roller matched with the lower compression roller and a lifting device for adjusting the roller distance between the lower compression roller and the upper compression roller, wherein the lifting device comprises supports arranged at two ends of the upper compression roller, annular frames arranged at two ends of the upper compression roller, a first cavity arranged in the supports, a plurality of obliquely arranged support plates arranged in the first cavity, a first support part arranged on the support plates, second support parts arranged above and below the upper compression roller, a driving part for driving the upper compression roller to lift and a side pulling part arranged at two sides of the upper compression roller, and the annular frames are connected with the upper compression roller through bearings.

Preferably, the first supporting component comprises a second cavity arranged in the supporting plate, a sliding plate arranged in the second cavity, a first spring matched with the sliding plate, a butt rod connected with the sliding plate, a clamping plate hinged at the tail end of the butt rod and a fine adjustment component for fine adjustment of the angle of the clamping plate, wherein the clamping plate is partially wrapped on the outer side of the annular frame.

Preferably, the fine adjustment component includes a connecting rod hinged to the clamping plate, first sliding grooves formed in two sides of the abutting rod, a first sliding block arranged in the first sliding groove, a first guide rod used for guiding the first sliding block, and a second spring arranged in the first sliding groove.

Preferably, the second supporting component includes a supporting block, a second sliding groove disposed in the supporting block, a second sliding block disposed in the second sliding groove, a second guide rod for guiding the second sliding block, a push rod sleeved on the second guide rod, and a third spring disposed between the second sliding block and the push rod.

Preferably, the driving part comprises two driving rods hinged to each other, a fixed shaft connected with the two driving rods, a third slider arranged at the bottom end of the driving rod, a third chute used for the third slider to slide, a bidirectional screw used for driving the two third sliders to synchronously move, and a motor connected with the bidirectional screw, wherein the top end of the driving rod is hinged to the sliding plate, and the fixed shaft is connected with the second slider.

Preferably, the side pull component includes a fourth sliding groove disposed on both sides of the first cavity, a fourth sliding block disposed in the fourth sliding groove, a third guide rod for guiding the fourth sliding block, a pull rod hinged to the fourth sliding block, and a fourth spring disposed on both sides of the fourth sliding block, and the pull rod is hinged to the sliding plate.

Preferably, the bidirectional screw includes a first thread portion and a second thread portion, the first thread portion and the second thread portion have opposite spiral directions, and the two third sliders are respectively screwed with the first thread portion and the second thread portion.

Preferably, the clamping plate is internally provided with a plurality of convex strips for increasing friction with the annular frame, the convex strips are provided with inclined parts, and the height of the inclined parts is gradually reduced towards two sides of the first cavity.

In addition, the invention also provides a battery cell forming method using the forming device for the battery cell of the lithium battery, which comprises the following steps:

s1, placing the laminated battery cell between an upper compression roller and a lower compression roller, and determining the thickness information of the battery cell;

s2, determining distance information between the lower pressing roller and the upper pressing roller;

s3, determining the position information of the upper pressing roller to be adjusted according to the thickness information;

s4, determining the rotation time and the rotation speed information of the motor according to the position information;

and S5, starting the motor, turning off the motor when the rotating speed and the time of the motor meet the requirements of the step S, and controlling the upper pressing roller and the lower pressing roller to carry out cold press molding on the battery cell.

Adopt above-mentioned scheme: by using the steps, the position of the battery cell to be molded can be determined through the scanning galvanometer system, the battery cell is conveniently molded, and the molding precision is improved.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, through the matched use of the body, the lower compression roller, the upper compression roller and the lifting device, the electric core can be subjected to cold press molding, the roller distance can be adjusted according to the thickness of the electric core, the adjustment precision is higher, the problem of overlarge molding error is avoided, and the problems that the roller distance adjustment error of the existing lithium battery electric core molding equipment is larger and the adjustment cannot be carried out according to the thickness of the electric core are solved.

2. According to the invention, the second cavity, the sliding plate, the first spring, the abutting rod and the clamping plate are arranged, the section of the clamping plate is U-shaped and wraps the outer side of the annular frame, the sliding plate can slide in the second cavity and can support the upper compression roller according to different heights, and the first spring can facilitate the position adjustment of the sliding plate and the position adjustment of the upper compression roller.

3. According to the invention, the connecting rod, the first sliding groove, the first sliding block, the first guide rod and the second spring are arranged, and the connecting rod can slide in the first sliding groove through the first sliding block, so that the clamping plate can incline to a certain extent, and the clamping plate can be conveniently adapted to annular frames at different positions.

4. According to the invention, by arranging the supporting block, the second chute, the second slider, the second guide rod, the ejector rod and the third spring, the ejector rod on the supporting block can support the upper press roll through the annular frame, so that the height of the upper press roll can be conveniently adjusted.

5. According to the invention, the driving rod, the fixed shaft, the third sliding blocks, the third sliding chutes, the two-way screw rods and the motor are arranged, the motor can drive the two third sliding blocks to synchronously slide in the third sliding chutes through the two-way screw rods, can drive the two driving rods to rotate, and drives the two sliding plates to lift, so that the precision of the height adjustment of the upper compression roller can be improved.

6. According to the invention, the fourth sliding chute, the fourth sliding block, the third guide rod and the pull rod are arranged, so that the side surface of the sliding plate can be pulled, and the problem of damage caused by different stress directions of the sliding plate can be prevented.

7. According to the invention, the first thread part and the second thread part are arranged, so that the two third sliding blocks can be synchronously folded and unfolded, the two clamping plates on one side can be synchronously lifted, and the stability of roller spacing adjustment is kept.

8. According to the invention, the raised strip and the inclined part are arranged, the raised strip can increase the friction between the raised strip and the annular frame, and the inclined part can lightly support the annular frame, so that the friction between the clamping plate and the annular frame is further improved.

9. By using the steps, the position of the battery cell to be molded can be determined through the scanning galvanometer system, the battery cell is conveniently molded, and the molding precision is improved.

Drawings

FIG. 1 is a schematic diagram of a structure provided by an embodiment of the present invention;

FIG. 2 is a front view of an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2 according to an embodiment of the present invention;

FIG. 4 is an enlarged view at A of FIG. 3 provided by an embodiment of the present invention;

FIG. 5 is an enlarged view at B of FIG. 4 provided by an embodiment of the present invention;

FIG. 6 is a cross-sectional view taken at B-B of FIG. 2 according to an embodiment of the present invention;

FIG. 7 is an enlarged view at C of FIG. 6 provided by an embodiment of the present invention;

FIG. 8 is an enlarged view at D of FIG. 6 provided by an embodiment of the present invention;

fig. 9 is an enlarged view at E in fig. 4 provided by an embodiment of the present invention.

In the figure: 1. a body; 2. a lower pressing roller; 3. an upper compression roller; 41. a support; 42. an annular frame; 43. a first cavity; 44. a support plate; 451. a second cavity; 452. a sliding plate; 453. a first spring; 454. a butting rod; 455. a splint; 4561. a connecting rod; 4562. a first chute; 4563. a first slider; 4564. a first guide bar; 4565. a second spring 461, a support block; 462. a second chute; 463. a second slider; 464. a second guide bar; 465. a top rod; 466. a third spring; 471. a drive rod; 472. a fixed shaft; 473. a third slider; 474. a third chute; 475. a bidirectional screw; 476. a motor; 481. a fourth chute; 482. a fourth slider; 483. a third guide bar; 484. a pull rod; 485. a fourth spring; 51. a first threaded portion; 52. a second threaded portion; 61. a convex strip; 62. an inclined portion.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.

The structure of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 9, an embodiment of the forming device for a lithium battery cell includes a body 1, a lower pressure roller 2 disposed on the body 1, an upper pressure roller 3 matched with the lower pressure roller 2, and a lifting device for adjusting a roller distance between the lower pressure roller 2 and the upper pressure roller 3, where the lifting device includes brackets 41 disposed at two ends of the upper pressure roller 3, annular frames 42 disposed at two ends of the upper pressure roller 3, a first cavity 43 disposed in the bracket 41, a plurality of obliquely disposed support plates 44 disposed in the first cavity 43, a first support member disposed on the support plates 44, a second support member disposed above and below the upper pressure roller 3, a driving member for driving the upper pressure roller 3 to lift, and side pulling members disposed at two sides of the upper pressure roller 3, and the annular frames 42 are connected to the upper pressure roller 3 through bearings.

According to the invention, through the arrangement of the body 1, the upper compression roller 3, the lower compression roller 2 and the lifting device, the position of the upper compression roller 3 can be adjusted, the distance between the upper compression roller 3 and the lower compression roller 2 can be adjusted, cold press molding can be conveniently carried out according to battery cores with different thicknesses, the supports 41 are arranged on two sides of the upper compression roller 3, the annular frame 42 is used for supporting the upper compression roller 3, the four support plates 44 are obliquely and symmetrically arranged, the position of the upper compression roller 3 can be adjusted through the annular frame 42, the roller distance between the upper compression roller 3 and the lower compression roller 2 can be conveniently adjusted, adjustment can be carried out according to the thickness of the battery core, and molding of the battery core is convenient.

Referring to fig. 4, the first supporting member includes a second cavity 451 provided in the supporting plate 44, a sliding plate 452 provided in the second cavity 451, a first spring 453 engaged with the sliding plate 452, an abutting rod 454 connected with the sliding plate 452, a clamping plate 455 hinged to an end of the abutting rod 454, and a fine-adjustment member for fine-adjusting an angle of the clamping plate 455, the clamping plate 455 being partially disposed outside the ring frame 42.

Adopt above-mentioned scheme: through setting up second cavity 451, sliding plate 452, first spring 453, butt pole 454 and splint 455, the cross-section of splint 455 is the U-shaped, and wraps up in the outside of ring frame 42, and sliding plate 452 can slide in second cavity 451, can support according to the height of difference upper nip roller 3, and first spring 453 can make things convenient for the position control of sliding plate 452, conveniently goes up the position control of nip roller 3.

Referring to fig. 5, the fine tuning component includes a connecting rod 4561 hinged to the clamping plate 455, first sliding grooves 4562 disposed on both sides of the abutting rod 454, first sliding blocks 4563 disposed in the first sliding grooves 4562, first guide rods 4564 for guiding the first sliding blocks 4563, and second springs 4565 disposed in the first sliding grooves 4562.

Adopt above-mentioned scheme: by providing the connecting rod 4561, the first sliding slot 4562, the first slide block 4563, the first guide 4564 and the second spring 4565, the connecting rod 4561 can slide inside the first sliding slot 4562 through the first slide block 4563, so that the clamping plate 455 can be inclined to some extent, and can be conveniently adapted to the ring frames 42 at different positions.

Referring to fig. 4, the second supporting member includes a supporting block 461, a second sliding slot 462 disposed in the supporting block 461, a second slider 463 disposed in the second sliding slot 462, a second guide rod 464 for guiding the second slider 463, a top bar 465 sleeved on the second guide rod 464, and a third spring 466 disposed between the second slider 463 and the top bar 465.

Adopt above-mentioned scheme: through setting up supporting shoe 461, second spout 462, second slider 463, second guide arm 464, ejector pin 465 and third spring 466, ejector pin 465 on the supporting shoe 461 can support last compression roller 3 through annular frame 42, can make things convenient for the regulation of last compression roller 3 height.

Referring to fig. 7, the driving member includes two driving rods 471 which are hinged to each other, a fixed shaft 472 which connects the two driving rods 471, a third sliding block 473 which is disposed at a bottom end of the driving rods 471, a third sliding slot 474 which is used for sliding the third sliding block 473, a bidirectional screw 475 which is used for driving the two third sliding blocks 473 to move synchronously, and a motor 476 which is connected to the bidirectional screw 475, wherein a top end of the driving rod 471 is hinged to the sliding plate 452, and the fixed shaft 472 is connected to the second sliding block 463.

Adopt above-mentioned scheme: by arranging the driving rod 471, the fixed shaft 472, the third slider 473, the third sliding chute 474, the bidirectional screw 475 and the motor 476, the motor 476 can drive the two third sliders 473 to synchronously slide in the third sliding chute 474 through the bidirectional screw 475, can drive the two driving rods 471 to rotate, and can drive the two sliding plates 452 to ascend and descend, so that the precision of the height adjustment of the upper press roller 3 can be improved.

Referring to fig. 8, the side pull member includes a fourth sliding groove 481 disposed at both sides of the first cavity 43, a fourth slider 482 disposed in the fourth sliding groove 481, a third guide rod 483 for guiding the fourth slider 482, a pull lever 484 hinged to the fourth slider 482, and a fourth spring 485 disposed at both sides of the fourth slider 482, the pull lever 484 hinged to the sliding plate 452.

Adopt above-mentioned scheme: by providing the fourth sliding groove 481, the fourth slider 482, the third guide rod 483, and the pull rod 484, the sliding plate 452 can be laterally pulled, and the problem of damage caused by a difference in the force direction of the sliding plate 452 can be prevented.

Referring to fig. 7, the bidirectional screw 475 includes a first screw part 51 and a second screw part 52, the first screw part 51 and the second screw part 52 are opposite in screw direction, and two third sliders 474 are respectively screwed with the first screw part 51 and the second screw part 52.

Adopt above-mentioned scheme: by providing the first screw part 51 and the second screw part 52, the two third sliders 473 can be synchronously extended and retracted, and the two clamp plates 455 on one side can be synchronously lifted and lowered, thereby keeping the roller gap adjustment stable.

Referring to fig. 9, the clamping plate 455 is provided at the inside thereof with a plurality of ribs 61 for increasing friction with the ring frame 42, and the ribs are provided with inclined portions 62, and the height of the inclined portions 62 is decreased toward both sides of the first cavity 43.

Adopt above-mentioned scheme: by providing the rib 61 and the inclined portion 62, the rib 61 can increase friction with the ring frame 42, and the inclined portion 62 can lightly hold the ring frame 42, thereby further increasing friction between the clamp plate 455 and the ring frame 42.

The invention also provides a battery cell forming method using the forming device for the battery cell of the lithium battery, which comprises the following steps:

s1, placing the laminated battery cell between the upper compression roller 3 and the lower compression roller 2, and determining the thickness information of the battery cell;

s2, determining the distance information between the lower pressing roller 2 and the upper pressing roller 3;

s3, determining the position information of the upper press roll 3 to be adjusted according to the thickness information;

s4, determining the rotation time and the rotation speed information of the motor 476 according to the position information;

and S5, starting the motor 476, turning off the motor 476 when the rotating speed and the time of the motor 476 meet the requirements according to the step S4, and controlling the upper press roll 3 and the lower press roll 2 to carry out cold press molding on the battery core.

Adopt above-mentioned scheme: by using the steps, the position of the battery cell to be molded can be determined through the scanning galvanometer system, the battery cell is conveniently molded, and the molding precision is improved.

The working principle of the invention is as follows:

when the roller spacing adjusting device is used, when the roller spacing between the upper pressing roller 3 and the lower pressing roller 2 needs to be adjusted, firstly, the motor 476 drives the two-way screw 475 to drive the two third sliders 473 to slide, at the moment, the two driving rods 471 rotate relatively, the fixing shaft 472 between the two driving shafts rises, the second slider 463 and the ejector rod 465 move upwards, meanwhile, the distance between the top ends of the driving rods 471 is reduced, the position of the sliding plate 452 is raised, the clamping plate 455 pushes the upper pressing roller 3 to rise through the annular frame 42, meanwhile, the pull rods 484 on the two sides can pull the sliding plate 452 to prevent stress damage, when the roller spacing between the upper pressing roller 3 and the lower pressing roller 2 needs to be adjusted, the motor 476 drives the two-way screw 475 to rotate reversely, and the fine adjustment of the roller spacing is convenient.

In summary, the following steps: this forming device for lithium cell electricity core uses through the cooperation that sets up body 1, lower compression roller 2, go up compression roller 3 and elevating gear, can carry out the cold press molding to electric core, can carry out the roll spacing according to the thickness of electric core and adjust, and the precision of adjusting is great moreover, avoids appearing the too big problem of shaping error, and it is great to the regulating error of roll spacing to have solved current lithium cell electricity core former, can not carry out the problem of adjusting according to the thickness of electric core.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.