CN215152086U

CN215152086U - Battery pole piece forming equipment

Info

Publication number: CN215152086U
Application number: CN202120086052.0U
Authority: CN
Inventors: 朱亮; 赵瑞瑞; 李焌桦; 祝媛; 刘建华; 刘金成
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-12-14
Anticipated expiration: 2031-01-13

Abstract

The utility model discloses a battery pole piece forming device, belonging to the technical field of battery pole piece production equipment, this battery pole piece former is including the conveying mechanism who is used for carrying the substrate, defeated material mechanism and roll-in mechanism, roll-in mechanism is including the first compression roller that sets up side by side in proper order, the second compression roller, third compression roller and fourth compression roller, interval between first compression roller and the second compression roller is the same with the interval between third compression roller and the fourth compression roller, the substrate is worn to locate between two second compression rollers and the third compression roller along vertical direction, first compression roller and second compression roller can roll-in and form first diaphragm by the active material granule of defeated material mechanism transport, third compression roller and fourth compression roller can roll-in and form the second diaphragm by the active material granule of defeated material mechanism transport, second compression roller and third compression roller can roll-in the both sides of substrate respectively with first diaphragm and second diaphragm. Compared with the prior art, the thickness of the formed battery pole piece is uniform, and the safety performance of the lithium ion battery is improved.

Description

Battery pole piece forming equipment

Technical Field

The utility model relates to a battery pole piece production facility technical field especially relates to a battery pole piece former.

Background

Lithium ion batteries have been used in the fields of mobile phones, notebook computers, and the like because of their high energy density, but further improvements in performance such as reduction in resistance and increase in capacity have been demanded with the expansion and development of applications.

Lithium ion battery electrodes are available in the form of battery electrode sheets, and for example, in order to manufacture rolled sheets such as battery electrode sheets from powders containing electrode active materials, compression molding of powders using a powder rolling device has been performed. In the powder calendering device, the powder is compressed and molded by a pressurizing roller on two sides of the base material to obtain the battery pole piece, but the base material is easy to shake in the transmission process to cause different thicknesses of the powder on two sides of the base material, so that in the later working process, the expansion conditions of different areas of the battery pole piece are different to cause the powder to fall off from the base material easily, and the normal work of the subsequent lithium ion battery is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery pole piece former to the thickness of the powder of the substrate both sides of the battery pole piece that exists among the solution prior art is different, influences the problem of follow-up lithium ion battery normal work.

As the conception, the utility model adopts the technical proposal that:

a battery pole piece forming device comprises a conveying mechanism for conveying a base material, a material conveying mechanism and a rolling mechanism, the roller pressing mechanism comprises a first pressing roller, a second pressing roller, a third pressing roller and a fourth pressing roller which are arranged side by side in sequence, the interval between the first pressing roller and the second pressing roller is the same as the interval between the third pressing roller and the fourth pressing roller, the base material penetrates through the space between the second press roller and the third press roller along the vertical direction, the first press roller and the second press roller can roll active substance particles conveyed by the material conveying mechanism to form a first membrane, the third press roller and the fourth press roller can roll the active substance particles conveyed by the conveying mechanism to form a second membrane, the second pressing roller and the third pressing roller can press the first film sheet and the second film sheet on two sides of the base material respectively.

Further, the temperature of the first pressing roller is higher than that of the second pressing roller, and the temperature of the fourth pressing roller is higher than that of the third pressing roller.

Furthermore, the battery pole piece forming equipment further comprises a first driving mechanism and a first mounting assembly, the first pressing roller and the second pressing roller are both mounted on the first mounting assembly, and the first driving mechanism can drive the first pressing roller and/or the second pressing roller so as to enable the first pressing roller and the second pressing roller to be close to or far away from each other.

Further, the first mounting assembly comprises two oppositely arranged first mounting structures and two oppositely arranged second mounting structures, the first press roller is mounted between the two first mounting structures, and the second press roller is mounted between the two second mounting structures; the first driving mechanism comprises two first driving structures, and the two first driving structures can respectively drive the two first mounting structures to move towards the direction close to or away from the third press roller.

Furthermore, the battery pole piece forming equipment further comprises a second driving mechanism and a second mounting assembly, the third pressing roller and the fourth pressing roller are mounted on the second mounting assembly, and the second driving mechanism can drive the second mounting assembly to move towards or away from the second pressing roller.

Further, the second mounting assembly comprises two oppositely-arranged supporting structures, two oppositely-arranged third mounting structures and two oppositely-arranged fourth mounting structures, each supporting structure is correspondingly provided with one third mounting structure and one fourth mounting structure, one of the third press roller and the fourth press roller is mounted between the two third mounting structures, the other one of the third press roller and the fourth press roller is mounted between the two fourth mounting structures, the fourth mounting structures and/or the third mounting structures can be slidably arranged on the corresponding supporting structures, and the supporting structures are connected to the second driving mechanism.

Further, the battery pole piece molding device further comprises a third driving mechanism, and the third driving mechanism is configured to drive the corresponding fourth mounting structure and/or the third mounting structure so as to enable the third pressing roller and the fourth pressing roller to approach or separate from each other.

Further, the third driving mechanism includes two third driving structures, and each of the third driving structures can drive the corresponding fourth mounting structure to move toward or away from the third mounting structure.

Further, the third drive structure includes the driving piece, promotes piece and first elastic component, the driving piece can drive promote the piece and remove along vertical direction, first elastic component set up in corresponding third mounting structure with between the fourth mounting structure, when the driving piece drive promote the piece when moving down, it can promote to promote the piece fourth mounting structure is to being close to corresponding the direction removal of third mounting structure.

Further, the third driving structure further comprises a second elastic member, and the second elastic member is arranged between the pushing block and the supporting structure.

Furthermore, the material conveying mechanism comprises at least two material conveying hoppers, wherein a material conveying opening of one material conveying hopper is positioned above the space between the first pressing roller and the second pressing roller, and a material conveying opening of the other material conveying hopper is positioned above the space between the third pressing roller and the fourth pressing roller.

Further, conveying mechanism includes first support piece and second support piece, first support piece can support the substrate coiled material, be provided with the winding roller on the second support piece, the winding roller can drive the substrate by vertically pass between second compression roller and the third compression roller.

The utility model has the advantages that:

the utility model provides a battery pole piece forming equipment, battery pole piece forming equipment is through setting up first compression roller, the second compression roller, third compression roller and fourth compression roller, the interval between first compression roller and the second compression roller is the same with the interval between third compression roller and the fourth compression roller, first compression roller and second compression roller roll-in active material granule and form first diaphragm, third compression roller and fourth compression roller roll-in active material granule and form the second diaphragm, later through second compression roller and third compression roller respectively with first diaphragm and second diaphragm roll-in the both sides of substrate, relative to prior art, can guarantee that the thickness of the first diaphragm of substrate both sides is unanimous with the thickness of second diaphragm, therefore, the thickness of the formed battery pole piece is uniform, the condition that active substances fall off to cause short circuit in the working process of the lithium ion battery is avoided, and the safety performance of the lithium ion battery is improved.

Drawings

Fig. 1 is a schematic structural diagram of a pole piece forming apparatus provided by the present invention;

fig. 2 is a schematic cross-sectional view of a pole piece forming apparatus provided by the present invention;

fig. 3 is a front view of the pole piece forming apparatus provided by the present invention.

In the figure:

1. a support frame; 11. a horizontal support plate; 111. an extension plate; 1111. a fourth chute; 12. a vertical support plate; 121. a third chute;

2. a conveying mechanism; 21. a first support member; 22. a second support member; 23. a first support roller; 24. a second support roller; 25. a third support roller;

3. a material conveying mechanism; 31. a material conveying hopper;

4. a rolling mechanism; 41. a first press roll; 42. a second press roll; 43. a third press roll; 44. a fourth press roll; 45. a first gear; 46. a second gear; 47. a third gear; 48. a fourth gear;

5. a first mounting assembly; 51. a first mounting structure; 52. a second mounting structure; 53. a first fixing member;

6. a first drive structure; 61. a first runner; 62. a first connecting rod;

7. a second mounting assembly; 71. a support structure; 711. a first part; 712. a second section; 713. a third section; 72. a third mounting structure; 73. a fourth mounting structure; 74. a second fixing member;

8. a second drive structure; 81. a second runner; 82. a second connecting rod;

9. a third drive structure; 91. a third rotating wheel; 92. a third connecting rod; 93. a pushing block; 94. a second elastic member;

100. a substrate.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to fig. 3, the present embodiment provides a battery pole piece forming apparatus, which includes a conveying mechanism 2 for conveying a substrate 100, a material conveying mechanism 3, and a rolling mechanism 4, wherein the rolling mechanism 4 includes a first pressing roller 41 disposed in parallel in sequence, the first pressing roller 41 and the second pressing roller 42 are the same as the third pressing roller 43 and the fourth pressing roller 44, the substrate 100 penetrates through the second pressing roller 42 and the third pressing roller 43 along the vertical direction, the first pressing roller 41 and the second pressing roller 42 can roll the active substance particles conveyed by the conveying mechanism 3 to form a first membrane, the third pressing roller 43 and the fourth pressing roller 44 can roll the active substance particles conveyed by the conveying mechanism 3 to form a second membrane, and the second pressing roller 42 and the third pressing roller 43 can roll the first membrane and the second membrane on two sides of the substrate 100 respectively.

The first pressing roller 41 and the third pressing roller 43 rotate in opposite directions, the second pressing roller 42 and the fourth pressing roller 44 rotate in opposite directions, a first film formed by the first pressing roller 41 and the second pressing roller 42 is attached to the second pressing roller 42, a second film formed by the third pressing roller 43 and the fourth pressing roller 44 is attached to the third pressing roller 43, and then the first film and the second film are respectively pressed on two sides of the substrate 100 by the second pressing roller 42 and the third pressing roller 43. So set up, can make the thickness that is located the first diaphragm and the second diaphragm of substrate 100 both sides respectively keep the same to make the thickness of the battery pole piece of formation even, and go on simultaneously with the roll-in shaping that active material granule roll-in formed diaphragm and battery pole piece, can improve the shaping efficiency of battery pole piece.

Further, in order to enable better attachment of the first film sheet to the second pressing roller 42, the temperature of the first pressing roller 41 is higher than that of the second pressing roller 42. In the embodiment, the temperature of the first pressing roller 41 is 40 ℃ to 300 ℃, and the temperature of the second pressing roller 42 is room temperature, so that the first film sheet can be better attached to the second pressing roller 42 after roll forming. In order to make the second film sheet better attached to the third pressing roller 43, the temperature of the fourth pressing roller 44 is higher than that of the third pressing roller 43, the temperature of the fourth pressing roller 44 is 40-300 ℃, and the temperature of the third pressing roller 43 is room temperature, so that the second film sheet 42 can be better attached to the third pressing roller 43 after roll forming.

Further, in the present embodiment, the roughness of each of the first press roller 41, the second press roller 42, the third press roller 43, and the fourth press roller 44 is 0.4 μm to 0.8 μm.

As shown in fig. 1, the feeding mechanism 3 includes at least two feeding hoppers 31, wherein a feeding port of one feeding hopper 31 is located above a space between a first pressing roller 41 and a second pressing roller 42, and a feeding port of the other feeding hopper 31 is located above a space between a third pressing roller 43 and a fourth pressing roller 44. Specifically, in the present embodiment, the material conveying mechanism 3 includes two material conveying hoppers 31. It can be understood that, the roll forming of the first film and the second film is carried out by the corresponding material conveying hoppers 31, so that the uniformity of the conveying of the active material particles can be ensured under the condition that the conveying speeds of the two material conveying hoppers 31 are the same, and the consistency of the thicknesses of the first film and the second film can be further ensured, of course, the number of the material conveying hoppers 31 can be more than two.

Further, the conveying mechanism 2 includes a first support 21 and a second support 22, the first support 21 can support the substrate web, and the second support 22 is provided with a winding roller, and the winding roller can drive the substrate 100 to pass through between the second pressing roller 42 and the third pressing roller 43. The conveying mechanism 2 further includes two first support rollers 23 for supporting the substrate 100, and a portion of the substrate 100 located between the two first support rollers 23 is vertically disposed. It can be understood that under the action of the two first supporting rollers 23, a part of the substrate 100 located between the two first supporting rollers 23 vertically penetrates between the second pressing roller 42 and the third pressing roller 43, so that the second pressing roller 42 and the third pressing roller 43 respectively press the first film and the second film on two sides of the substrate 100.

Further, the above-mentioned conveying mechanism 2 further includes a second support roller 24 and a third support roller 25, at least one second support roller 24 and at least one third support roller 25 are provided between the first support 21 and the rolling mechanism 4, at least one second support roller 24 and at least one third support roller 25 are provided between the second support 22 and the rolling mechanism 4, and the substrate 100 can be supported and tensioned by the second support roller 24 and the third support roller 25. Specifically, in the present embodiment, one second support roller 24 and two third support rollers 25 are provided between the first support 21 and the rolling mechanism 4, and the second support roller 24 is located between the two third support rollers 25 and below the two third support rollers 25 in the vertical direction. A second support roller 24 and two third support rollers 25 are disposed between the second support member 22 and the rolling mechanism 4, and the second support roller 24 is located between the two third support rollers 25 and is located below the two third support rollers 25 in the vertical direction. It is understood that in this embodiment, the substrate 100 is wound under the two second supporting rollers 24.

Further, in the present embodiment, the positions of the second support rollers 24 in the vertical direction are each adjustable. By setting the second support rollers 24 to be adjustable in position in the vertical direction, the base material 100 can be tensioned by adjusting the positions of the two second support rollers 24 in the vertical direction. Of course, in other embodiments, the third support roller 25 may be arranged to be vertically adjustable, and the substrate 100 may be tensioned by adjusting the position of the third support roller 25.

Specifically, as shown in fig. 1 and fig. 2, the pole piece forming apparatus provided in this embodiment further includes a support frame 1. Specifically, the support stand 1 includes a horizontal support plate 11 and a vertical support plate 12, and the vertical support plate 12 is vertically connected to the horizontal support plate 11. The above-mentioned first support 21, second support 22, first support roller 23, second support roller 24 and third support roller 25 are all provided on the vertical support plate 12.

In the present embodiment, the vertical support plate 12 is provided with linear guides extending in the vertical direction corresponding to the two second support rollers 24, respectively, and the second support rollers 24 are slidably disposed on the linear guides so as to be movable in the vertical direction. In addition, in the present embodiment, the position of the upper one of the two first support rollers 23 in the horizontal direction is adjustable, the position of the lower one of the two first support rollers 23 in the vertical direction is adjustable, and then the interference between the substrate 100 and the first press roller 41 is avoided by adjusting the position of the lower one of the two first support rollers 23 in the vertical direction, and the perpendicularity of the portion of the substrate 100 located between the two first support rollers 23 can be adjusted by adjusting the position of the upper one of the two first support rollers 23 in the horizontal direction. Specifically, a third sliding groove 121 is formed in the vertical support plate 12 along the horizontal direction, and one of the two first support rollers 23 located above is slidably disposed in the third sliding groove 121. The horizontal support plate 11 is provided with an extension plate 111 extending in the vertical direction, the extension plate 111 is provided with a fourth sliding groove 1111 extending in the vertical direction, and one first support roller 23 located below of the two first support rollers 23 is slidably disposed in the fourth sliding groove 1111. Wherein, the horizontal direction is the ab direction in fig. 2, and the vertical direction is the cd direction in fig. 2.

As shown in fig. 1 to 3, the battery pole piece forming apparatus further includes a first driving mechanism and a first mounting assembly 5, wherein the first pressing roller 41 and the second pressing roller 42 are both mounted on the first mounting assembly 5, and the first driving mechanism can drive the first pressing roller 41 to move towards or away from the second pressing roller 42.

Specifically, in the present embodiment, the first mounting assembly 5 includes two oppositely disposed first mounting structures 51 and two oppositely disposed second mounting structures 52, the first pressing roller 41 is rotatably mounted between the two first mounting structures 51, and the second pressing roller 42 is rotatably mounted between the two second mounting structures 52. Further, each second mounting structure 52 is provided with a first sliding groove, each first mounting structure 51 can be slidably disposed in the corresponding first sliding groove, and the first driving mechanism can push the first mounting structure 51 to slide along the corresponding first sliding groove, so as to drive the first pressing roller 41 to be close to or away from the second pressing roller 42.

Further, the first mounting assembly 5 further includes two first fixing members 53, and the two first fixing members 53 are respectively connected to the two second mounting structures 52. The first driving mechanism includes two first driving structures 6, and the two first driving structures 6 are respectively used for driving the two first mounting structures 51 to slide. Specifically, the first driving structure 6 includes a first rotating wheel 61 and a first connecting rod 62 connected to each other, the first connecting rod 62 is connected to the first mounting structure 51 through a corresponding first fixing member 53, the first connecting rod 62 is connected to the first fixing member 53 in a threaded manner, and the corresponding first mounting structure 51 can be driven to slide along a corresponding first sliding groove by rotating the first rotating wheel 61, so as to adjust the distance between the first pressing roller 41 and the second pressing roller 42.

Further, in the present embodiment, the second mounting structure 52 and the first fixing member 53 are mounted on the horizontal support plate 11. Further, in the present embodiment, the first mounting structure 51 includes a first mounting block, and it is further preferable that the first mounting structure 51 includes one first mounting block, and the first pressing roller 41 is mounted between the two first mounting blocks. Of course, in other embodiments, the first mounting structure 51 may also include a plurality of first mounting blocks. In addition, in the present embodiment, the second mounting structure 52 includes a second mounting block, and it is further preferable that the second mounting structure 52 includes one second mounting block, and the second pressing roller 42 is mounted between the two second mounting blocks. Of course, in other embodiments, the second mounting structure 52 may also include a plurality of second mounting blocks.

Of course, in other embodiments, the first driving mechanism may drive the second pressing roller 42 to move closer to or away from the first pressing roller 41. Specifically, the first mounting assembly 5 includes two oppositely disposed fifth mounting structures and two oppositely disposed sixth mounting structures, wherein the first pressing roller 41 is mounted between the two fifth mounting structures, and the second pressing roller 42 is mounted between the two sixth mounting structures. The first driving mechanism comprises two fourth driving mechanisms, and the two fourth driving mechanisms can respectively drive the two sixth mounting structures to move towards or away from the corresponding fifth mounting structures. The fourth driving mechanism may be a cylinder, a motor screw, or the like, and may be configured to drive the sixth mounting structure, which is not specifically limited in this embodiment. Of course, the first driving mechanism can drive the first pressing roller 41 and the second pressing roller 42 to move simultaneously, so that the first pressing roller 41 and the second pressing roller 42 move closer to or away from each other, and the specific structure of the first driving mechanism is not particularly limited in this embodiment as long as the simultaneous driving of the first pressing roller 41 and the second pressing roller 42 can be realized.

As shown in fig. 1 to 3, the battery pole piece forming apparatus further includes a second driving mechanism and a second mounting assembly 7 slidably disposed on the horizontal support plate 11, wherein the third pressing roller 43 and the fourth pressing roller 44 are both mounted on the second mounting assembly 7, and the second driving mechanism can drive the second mounting assembly 7 to move toward or away from the second pressing roller 42. Specifically, in the present embodiment, the second mounting assembly 7 includes two oppositely disposed support structures 71, and the third pressing roller 43 and the fourth pressing roller 44 are both mounted between the two support structures 71. The second mounting assembly 7 further comprises two second fixing members 74, and the two second fixing members 74 correspond to the two support structures 71 respectively. The two second fixing members 74 are both fixedly disposed on the horizontal support plate 11, and the two support structures 71 are both slidably disposed on the horizontal support plate 11. Further, in order to enable the support structures 71 to slide stably, a limit groove is disposed on the horizontal support plate 11 corresponding to each support structure 71, and the support structures 71 are slidably disposed in the corresponding limit grooves. Further preferably, in order to reduce the friction between the support structure 71 and the horizontal support plate 11, rollers are provided on the support structure 71. By providing the rollers, the sliding of the support structure 71 with respect to the horizontal support plate 11 is changed to rolling, so that the friction between the support structure 71 and the horizontal support plate 11 can be reduced.

The second driving mechanism comprises two second driving structures 8, and the two second driving structures 8 are respectively used for driving the two supporting structures 71 to move. In particular, the second driving structure 8 comprises a second wheel 81 and a second connecting rod 82 connected, the second connecting rod 82 being connected to the corresponding supporting structure 71 through the corresponding second fixing element 74, the second connecting rod 82 being screwed to the second fixing element 74. The corresponding supporting structures 71 can be driven to move by rotating the second rotating wheel 81, so that the two supporting structures 71 can be driven to move respectively through the two second driving structures 8, the second mounting assembly 7 is driven to move integrally, and the distance between the second pressing roller 42 and the third pressing roller 43 can be adjusted.

Further, in the present embodiment, the second mounting assembly 7 further includes two third mounting structures 72 disposed opposite to each other and two fourth mounting structures 73 disposed opposite to each other, the third pressing roller 43 is mounted between the two third mounting structures 72, the fourth pressing roller 44 is mounted between the two fourth mounting structures 73, each of the supporting structures 71 is provided with a third mounting structure 72 and a fourth mounting structure 73, wherein the third mounting structures 72 are fixedly disposed on the corresponding supporting structures 71, and the fourth mounting structures 73 are slidably disposed on the corresponding supporting structures 71.

Specifically, the support structure 71 has a second sliding slot thereon, and the fourth mounting structure 73 is slidably disposed in the second sliding slot. The battery pole piece forming equipment further comprises a third driving mechanism, the third driving mechanism comprises two third driving structures 9, and the two third driving structures 9 are respectively used for driving the two fourth mounting structures 73 to slide along the corresponding second sliding grooves and move towards the direction close to or away from the third mounting structure 72. Specifically, the third driving structure 9 includes a driving member, a pushing block 93, and a first elastic member, and the driving member can drive the pushing block 93 to move in the vertical direction. In particular, the drive member comprises a third runner 91 and a third connecting rod 92. Wherein the third wheel 91 is connected to the third connecting rod 92, the third connecting rod 92 is vertically arranged, one end of the third connecting rod 92 passes through the supporting structure 71 and is connected to the pushing block 93, the third connecting rod 92 is in threaded connection with the supporting structure 71, the third wheel 91 is arranged at the other end of the third connecting rod, the pushing block 93 is located in the second sliding groove, and the first elastic member is arranged between the third mounting structure 72 and the fourth mounting structure 73. Further, a first inclined surface is disposed on the pushing block 93, and a second inclined surface abutting against the first inclined surface is disposed on the fourth mounting structure 73. When the third runner 91 is rotated so that the third connecting rod 92 pushes the pushing block 93 to move downward, the pushing block 93 slides downward along the second slope, and simultaneously pushes the fourth mounting structure 73 to move in a direction approaching the third mounting structure 72, so that the distance between the third pressing roller 43 and the fourth pressing roller 44 is reduced. In the process, the first elastic member is compressed, when the third runner 91 is rotated to make the third connecting rod 92 drive the pushing block 93 to move upwards, the pushing block 93 slides upwards along the second inclined surface, and under the resilient action of the first elastic member, the fourth mounting structure 73 is pushed to move away from the third mounting structure 72, so that the distance between the third pressing roller 43 and the fourth pressing roller 44 is increased.

Specifically, in the present embodiment, the third mounting structure 72 includes a third mounting block, and it is further preferable that the third mounting structure 72 includes one third mounting block, and the third pressing roller 43 is mounted between two third mounting blocks. Of course, in other embodiments, the third mounting structure 72 may also include a plurality of third mounting blocks. Further, in the present embodiment, the fourth mounting structure 73 includes a fourth mounting block, and it is further preferable that the fourth mounting structure 73 includes one fourth mounting block, and the fourth pressing roller 44 is mounted between two fourth mounting blocks. Of course, in other embodiments, the fourth mounting structure 73 may also include a plurality of fourth mounting blocks.

Of course, in other embodiments, it is also possible that the third pressing roller 43 is installed between two fourth installation structures 73, and the fourth pressing roller 44 is installed between two third installation structures 72, in which case the third driving mechanism includes two third driving structures 9, and each third driving structure 9 can drive the third pressing roller 43 to move toward or away from the fourth pressing roller 44. Or the third mounting structure 72 is slidably disposed on the corresponding supporting structure 71, and the fourth mounting structure 73 is fixedly disposed on the corresponding supporting structure 71, and the third driving mechanism includes two third driving structures 9, and each third driving structure 9 can drive the corresponding third mounting structure 72 to move toward or away from the fourth mounting structure 73. Still alternatively, the third mounting structures 72 and the fourth mounting structures 73 are slidably disposed on the corresponding support structures 71, and it is understood that the third driving mechanism includes four third driving structures 9, each third mounting structure 72 corresponds to one third driving structure 9, and each fourth mounting structure 73 corresponds to one third driving structure 9.

Further, the third driving structure 9 further comprises a second elastic member 94, and the second elastic member 94 is disposed between the pushing block 93 and the supporting structure 71. By providing the second elastic member 94, it is possible to cushion the movement of the push block 93 and provide support to the push block 93 so that the position of the push block 93 is kept stable when the rotation of the third runner 91 is stopped, thereby keeping the interval between the third pressing roller 43 and the fourth pressing roller 44 stable.

As shown in fig. 1-3, in the present embodiment, the support structure 71 includes a first portion 711, a second portion 712, and a third portion 713, the second portion 712 is vertically connected to the first portion 711, the third portion 713 is vertically connected to the second portion 712, and the second sliding groove is formed among the first portion 711, the second portion 712, and the third portion 713. The first portion 711 is disposed in the limiting groove, and the first portion 711 is provided with a roller. The second connecting rod 82 is screwed to the second part 712, and one surface of the pushing block 93 abuts against the second part 712. The third connecting rod 92 is connected to the pushing block 93 through the third portion 713, and the third connecting rod 92 is screw-connected to the third portion 713.

As shown in fig. 1, in order to improve the rotation consistency of the first pressure roller 41, the second pressure roller 42, the third pressure roller 43 and the fourth pressure roller 44, a first gear 45 is connected to one end of the first pressure roller 41, a second gear 46 is connected to one end of the second pressure roller 42, a third gear 47 is connected to one end of the third pressure roller 43, and a fourth gear 48 is connected to one end of the fourth pressure roller 44, wherein the first gear 45 is meshed with the second gear 46, the second gear 46 is meshed with the third gear 47, and the third gear 47 is meshed with the fourth gear 48.

To sum up, the battery pole piece former that this embodiment provided, through setting up first compression roller 41, second compression roller 42, third compression roller 43 and fourth compression roller 44, first compression roller 41 and second compression roller 42 roll-in active material granule form first diaphragm, third compression roller 43 and fourth compression roller 44 roll-in active material granule form the second diaphragm, later with first diaphragm and second diaphragm roll-in the both sides of substrate 100 respectively through second compression roller 42 and third compression roller 43, for prior art, can make the thickness that is located the first diaphragm and the second diaphragm of substrate 100 both sides respectively unanimous, thereby guarantee the thickness of the battery pole piece of formation even, avoid the follow-up active material that appears in lithium ion course of operation to drop and lead to the condition appearance of short circuit, improve lithium ion battery's security performance.

The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a battery pole piece former, characterized in that, is including conveying mechanism (2), defeated material mechanism (3) and the rolling mechanism (4) that are used for carrying substrate (100), rolling mechanism (4) are including first compression roller (41), second compression roller (42), third compression roller (43) and fourth compression roller (44) that set up side by side in proper order, first compression roller (41) with interval between second compression roller (42) with third compression roller (43) with interval between fourth compression roller (44) is the same, substrate (100) wear to locate along vertical direction second compression roller (42) with between third compression roller (43), first compression roller (41) with second compression roller (42) can roll by the active material granule that defeated material mechanism (3) carried forms first diaphragm, third compression roller (43) with fourth compression roller (44) can by the active material granule that defeated material mechanism (3) carried forms the second diaphragm Two film sheets, the second and third press rollers (42, 43) being capable of pressing the first and second film sheets against both sides of the substrate (100), respectively.

2. The battery pole piece molding apparatus according to claim 1, wherein the temperature of the first pressing roller (41) is higher than that of the second pressing roller (42), and the temperature of the fourth pressing roller (44) is higher than that of the third pressing roller (43).

3. The battery pole piece forming device according to claim 1, further comprising a first driving mechanism and a first mounting assembly (5), wherein the first pressing roller (41) and the second pressing roller (42) are both mounted on the first mounting assembly (5), and the first driving mechanism can drive the first pressing roller (41) and/or the second pressing roller (42) to enable the first pressing roller (41) and the second pressing roller (42) to approach or separate from each other.

4. The battery pole piece molding apparatus of claim 3, wherein the first mounting assembly (5) comprises two oppositely disposed first mounting structures (51) and two oppositely disposed second mounting structures (52), the first pressing roller (41) is mounted between the two first mounting structures (51), and the second pressing roller (42) is mounted between the two second mounting structures (52); the first driving mechanism comprises two first driving structures (6), and the two first driving structures (6) can respectively drive the two first mounting structures (51) to move towards or away from the second pressing roller (42).

5. The battery pole piece forming device according to claim 1, further comprising a second driving mechanism and a second mounting assembly (7), wherein the third pressing roller (43) and the fourth pressing roller (44) are both mounted on the second mounting assembly (7), and the second driving mechanism can drive the second mounting assembly (7) to move towards or away from the second pressing roller (42).

6. The battery pole piece forming device according to claim 5, wherein the second mounting assembly (7) comprises two oppositely arranged support structures (71), two oppositely arranged third mounting structures (72) and two oppositely arranged fourth mounting structures (73), one third mounting structure (72) and one fourth mounting structure (73) are correspondingly arranged on each support structure (71), one of the third press roller (43) and the fourth press roller (44) is mounted between the two third mounting structures (72), and the other is mounted between the two fourth mounting structures (73), the fourth mounting structure (73) and/or the third mounting structure (72) are slidably arranged on the corresponding support structure (71), the support structure (71) being connected to the second drive mechanism.

7. The battery pole piece molding apparatus according to claim 6, further comprising a third driving mechanism configured to drive the corresponding fourth mounting structure (73) and/or the third mounting structure (72) to approach or separate the third pressing roller (43) and the fourth pressing roller (44).

8. The battery pole piece molding apparatus of claim 7, wherein the third driving mechanism comprises two third driving structures (9), each third driving structure (9) being capable of driving the corresponding fourth mounting structure (73) to move toward or away from the third mounting structure (72).

9. The battery pole piece forming device according to claim 8, wherein the third driving structure (9) comprises a driving member, a pushing block (93) and a first elastic member, the driving member can drive the pushing block (93) to move along a vertical direction, the first elastic member is arranged between the corresponding third mounting structure (72) and the fourth mounting structure (73), and when the driving member drives the pushing block (93) to move downwards, the pushing block (93) can push the fourth mounting structure (73) to move towards a direction close to the corresponding third mounting structure (72).

10. The battery pole piece molding apparatus of claim 9, wherein the third driving structure (9) further comprises a second elastic member (94), the second elastic member (94) being disposed between the pushing block (93) and the supporting structure (71).

11. The battery pole piece forming device according to claim 1, wherein the material conveying mechanism (3) comprises at least two material conveying hoppers (31), wherein a material conveying opening of one material conveying hopper (31) is positioned above the space between the first pressing roller (41) and the second pressing roller (42), and a material conveying opening of the other material conveying hopper (31) is positioned above the space between the third pressing roller (43) and the fourth pressing roller (44).

12. The battery pole piece forming device according to claim 1, wherein the conveying mechanism (2) comprises a first support member (21) and a second support member (22), the first support member (21) can support a substrate web, a winding roller is arranged on the second support member (22), and the winding roller can drive the substrate (100) to vertically pass through between the second pressing roller (42) and the third pressing roller (43).