Battery pole piece rolling device

Abstract

The utility model provides a battery pole piece rolling device which comprises a fixedly-arranged lower pressing roller, an upper pressing roller movably arranged over the lower pressing roller and guide rollers arranged on the two sides of the lower pressing roller, the two ends of the upper pressing roller are rotationally connected with mounting bases, the mounting bases are connected with vertical adjusting assemblies, and the vertical adjusting assemblies are connected with the lower pressing roller. The vertical adjusting assembly comprises a vertically-arranged telescopic mechanism and an elastic compensation mechanism arranged on the telescopic mechanism, and the mounting base is connected with the telescopic mechanism through the elastic compensation mechanism. The roller press disclosed by the utility model has wide applicability, and can automatically compensate the compaction acting force and ensure the compaction effect.

Description

Technical Field

[0001] This utility model relates to the field of battery electrode processing technology, and in particular to a battery electrode rolling device. Background Technology

[0002] With the rapid development of new energy vehicles and energy storage industries, the energy density and consistency of lithium batteries have become core competitive indicators. Electrode compaction is a crucial step in lithium battery manufacturing, directly affecting battery capacity, cycle life, and safety. Traditional roller presses often employ a double-roller pressing structure, using hydraulic or mechanical pressure to compact the electrodes.

[0003] Existing roller pressing devices suffer from wear on the roller surface after long-term use, requiring frequent shutdowns for manual adjustment of the gap, which is time-consuming. Furthermore, since the pressure needs to be accurately controlled during the electrode compaction process, manual adjustment is less effective and cannot meet processing requirements. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a battery electrode rolling device that can adapt to the compaction of battery electrodes of different thicknesses and can automatically adjust the spacing between the rollers according to the pressure requirements to ensure processing quality.

[0005] According to an embodiment of the present invention, a battery electrode rolling device is provided, comprising a fixedly arranged lower pressure roller, an upper pressure roller movably arranged directly above the lower pressure roller, and guide rollers arranged on both sides of the lower pressure roller. The two ends of the upper pressure roller are rotatably connected to mounting seats. The mounting seats are connected to a vertical adjustment assembly. The vertical adjustment assembly includes a vertically arranged telescopic mechanism and an elastic compensation mechanism arranged on the telescopic mechanism. The mounting seats are connected to the telescopic mechanism through the elastic compensation mechanism.

[0006] Preferably, the telescopic mechanism includes a telescopic arm and a distance sensor disposed between the telescopic arm and the lower pressure roller.

[0007] More preferably, the telescopic arm is provided with a vertical movable groove, the mounting base extends into the movable groove and slides therein, and the elastic compensation mechanism includes an elastic element connected to the top and bottom of the mounting base and a telescopic element disposed above the mounting base. The elastic element at the bottom is connected to the movable groove, and the elastic element at the top is connected to the telescopic element through a pressure sensor.

[0008] More preferably, the telescopic member includes a piston chamber disposed within the telescopic arm and located above the movable groove, a piston rod disposed within the piston chamber and extending downward into the movable groove, a pressure sensor being provided at the bottom of the piston rod, and the pressure sensor being connected to the elastic member.

[0009] More preferably, a vertical displacement sensor is provided between the mounting base and the movable groove.

[0010] More preferably, the upper pressure roller has a spiral cold flow channel inside, and the mounting base has a rotary joint that communicates with the cold flow channel.

[0011] In a further preferred embodiment, the cross-section of the cold flow channel is trapezoidal, and the outer side is wider than the inner side.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The upper pressure roller is connected to a telescopic mechanism, and a distance sensor is also installed between the upper and lower pressure rollers. When it is necessary to press electrodes of different thicknesses, the distance between the upper and lower pressure rollers can be adjusted more accurately according to the thickness of the electrodes.

[0014] The upper pressure roller is connected to the telescopic mechanism through an elastic compensation mechanism. During compaction, when the pressure roller wears, the elastic compensation mechanism can detect the change in compaction force and automatically adjust it according to the set compaction force to ensure the compaction effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a battery electrode rolling device according to the present invention.

[0016] Figure 2 This is a schematic diagram of the vertical adjustment assembly and the upper pressure roller in a battery electrode rolling device according to this utility model.

[0017] In the above figures: 1. Lower pressure roller; 2. Upper pressure roller; 201. Cold flow channel; 3. Guide roller; 4. Mounting base; 401. Rotary joint; 5. Vertical adjustment assembly; 510. Telescopic mechanism; 511. Telescopic arm; 512. Distance sensor; 513. Movable groove; 520. Elastic compensation mechanism; 521. Elastic element; 522. Telescopic element; 523. Piston chamber; 524. Piston rod; 525. Pressure sensor; 526. Displacement sensor. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0019] This utility model provides an embodiment, such as Figure 1 , Figure 2As shown, a battery electrode rolling device includes a fixedly arranged lower pressure roller 1, an upper pressure roller 2 movably arranged directly above the lower pressure roller 1, and guide rollers 3 arranged on both sides of the lower pressure roller 1. The two ends of the upper pressure roller 2 are rotatably connected to mounting seats 4. The mounting seats 4 are connected to a vertical adjustment assembly 5. The vertical adjustment assembly 5 includes a vertically arranged telescopic mechanism 510 and an elastic compensation mechanism 520 arranged on the telescopic mechanism 510. The mounting seats 4 are connected to the telescopic mechanism 510 through the elastic compensation mechanism 520.

[0020] The height of the upper pressure roller 2 can be adjusted by the telescopic mechanism 510, thereby changing the distance between the upper pressure roller 2 and the lower pressure roller 1, which can adapt to the compaction work of electrode sheets of different thicknesses.

[0021] During compaction, when wear occurs on the surface of the pressure rollers, causing a slight change in the distance between the upper pressure roller 2 and the lower pressure roller 1, the elastic compensation mechanism 520 can ensure the compaction effect between the upper pressure roller 2 and the lower pressure roller 1.

[0022] In order to facilitate the adjustment of the height of the upper pressure roller 2 according to the thickness of the electrode sheet, in a further embodiment, the telescopic mechanism 510 includes a telescopic arm 511 and a distance sensor 512 disposed between the telescopic arm 511 and the lower pressure roller 1.

[0023] The distance sensor 512 can detect the distance between the two pressure rollers in real time. When processing electrode sheets of different thicknesses, the position of the upper pressure roller 2 can be accurately adjusted according to the distance between the pressure rollers and the thickness of the electrode sheet.

[0024] To achieve precise compensation, in a further embodiment, the telescopic arm 511 is provided with a vertical movable groove 513, and the mounting base 4 extends into the movable groove 513 and slides therein. The elastic compensation mechanism 520 includes an elastic element 521 connected to the top and bottom of the mounting base 4 and a telescopic element 522 disposed above the mounting base 4. The elastic element 521 located at the bottom is connected to the movable groove 513, and the elastic element 521 located at the top is connected to the telescopic element 522 through a pressure sensor 525.

[0025] The force exerted by the upper pressure roller 2 on the electrode sheet will be fed back to the pressure sensor 525. When the pressure changes, the telescopic component 522 will move according to the pressure change trend, causing the force of the elastic component 521 to change.

[0026] When the pressure sensor 525 detects that the pressure has decreased, the telescopic member 522 squeezes the elastic member 521. When the pressure sensor 525 detects that the pressure has increased, the telescopic member 522 relaxes and reduces the force on the elastic member 521, so that the upper pressure roller 2 can produce a suitable compaction effect on the electrode sheet.

[0027] Specifically, such as Figure 2 As shown, the telescopic member 522 includes a piston chamber 523 disposed in the telescopic arm 511 and located above the movable groove 513, and a piston rod 524 disposed in the piston chamber 523 and extending downward into the movable groove 513. A pressure sensor 525 is provided at the bottom of the piston rod 524, and the pressure sensor 525 is connected to the elastic member 521.

[0028] An air compressor is connected to the piston chamber 523, and both the air compressor and the pressure sensor 525 are connected to a controller.

[0029] In order to facilitate accurate monitoring of the adjustment of the upper pressure roller 2, in a further embodiment, a vertical displacement sensor 526 is provided between the mounting base 4 and the movable groove 513.

[0030] To prevent the upper pressure roller 2 from getting too hot during the compaction process, in a further embodiment, the upper pressure roller 2 is provided with a spiral cold flow channel 201 inside, and the mounting base 4 is provided with a rotary joint 401 that communicates with the cold flow channel 201.

[0031] In order to further improve the cooling effect on the surface of the upper pressure roller 2, in a further embodiment, the cross-section of the cold flow channel 201 is trapezoidal, and the outer side is wider than the inner side.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A battery pole piece rolling device, comprising a fixedly arranged lower pressing roller (1), a movably arranged upper pressing roller (2) arranged directly above the lower pressing roller (1), and guide rollers (3) arranged on both sides of the lower pressing roller (1), characterized in that, Both ends of the upper compression roller (2) are rotatably connected with a mounting base (4), the mounting base (4) is connected with a vertical adjusting assembly (5), the vertical adjusting assembly (5) comprises a vertically arranged telescopic mechanism (510) and an elastic compensation mechanism (520) arranged on the telescopic mechanism (510), and the mounting base (4) is connected with the telescopic mechanism (510) through the elastic compensation mechanism (520).

2. The battery pole piece rolling device according to claim 1, wherein, The telescopic mechanism (510) comprises a telescopic arm (511) and a distance sensor (512) arranged between the telescopic arm (511) and the lower compression roller (1).

3. The battery pole piece rolling device according to claim 2, wherein, The telescopic arm (511) is provided with a vertical movable groove (513), the mounting base (4) extends into the movable groove (513) and is in sliding fit with the movable groove (513), the elastic compensation mechanism (520) comprises elastic members (521) connected to the top and bottom of the mounting base (4) and a telescopic member (522) arranged above the mounting base (4), the elastic member (521) at the bottom is connected with the movable groove (513), and the elastic member (521) at the top is connected with the telescopic member (522) through a pressure sensor (525).

4. The battery pole piece rolling device according to claim 3, wherein, The telescopic member (522) comprises a piston cavity (523) arranged in the telescopic arm (511) and located above the movable groove (513) and a piston rod (524) arranged in the piston cavity (523) and penetrating downward into the movable groove (513), a bottom of the piston rod (524) is provided with the pressure sensor (525), and the pressure sensor (525) is connected with the elastic member (521).

5. The battery pole piece rolling device according to claim 3, wherein, A vertical displacement sensor (526) is arranged between the mounting base (4) and the movable groove (513).

6. The battery pole piece rolling device according to any one of claims 1-5, wherein, The upper compression roller (2) is internally provided with a spiral cold flow channel (201), and the mounting base (4) is internally provided with a rotary joint (401) in communication with the cold flow channel (201).

7. The battery pole piece rolling device of claim 6, wherein, The cold flow channel (201) has a trapezoidal cross section, and an outer side is wider than an inner side.

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