Lithium battery pole piece double-roller combination device

Abstract

The utility model discloses a lithium battery pole piece double-roller combination device which comprises a double-roller machine, a heating assembly and a cooling assembly are respectively arranged on two sides of the double-roller machine, and the heating assembly and the cooling assembly are respectively connected with a circulating oil path system. The two circulating oil way systems can heat and cool the heating assembly and the cooling assembly correspondingly, an unwinding device is arranged at the side end of the heating assembly, a winding device is arranged at the side end of the cooling assembly, and an edge pre-pressing device is further arranged between the double-roller machine and the heating assembly. According to the utility model, the heating assembly and the cooling assembly are integrated on the two sides of the double-roller machine, so that the continuous treatment of heating, compacting and cooling of the pole piece is realized, the transfer time between working procedures is shortened, and the production continuity is improved; meanwhile, the unwinding device, the pre-pressing device and the winding device are integrally arranged, so that the stable transmission of the pole piece is ensured, and the quality risk caused by transfer is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of roll combination, and specifically relates to a lithium battery pole piece roll combination device. BACKGROUND

[0002] In the production process of lithium battery pole piece, roll compaction is a key process, which aims to improve the compaction density of the pole piece, reduce the porosity, and thus improve the energy density and cycle performance of the battery. In the prior art, the pole piece roll device usually adopts normal temperature compaction mode. In order to achieve high compaction density, the roll pressure needs to be increased or the roll gap needs to be reduced, but this will cause the pole piece to be subjected to excessive force, and defects such as belt breakage and edge wavy edge are prone to occur, which affects the product quality and production efficiency.

[0003] In addition, the heating, compaction and cooling functions of the existing device are usually independently arranged, and the pole piece is prone to wrinkle when being transmitted between processes due to tension fluctuation, and there is a lack of targeted treatment for the edge of the pole piece, which causes the edge stress concentration problem to be prominent, and further reduces the production yield. SUMMARY

[0004] Therefore, the utility model provides a lithium battery pole piece roll combination device to overcome the problems of the prior art.

[0005] The utility model is implemented by the following technical schemes:

[0006] A lithium battery pole piece roll combination device, comprising a roll mill, heating assemblies and cooling assemblies are arranged on both sides of the roll mill, the heating assemblies and the cooling assemblies are respectively connected with circulating oil circuit systems, the two circulating oil circuit systems can respectively realize heating and cooling effects of the heating assemblies and the cooling assemblies, side ends of the heating assemblies are provided with unwinding devices, side ends of the cooling assemblies are provided with winding devices, an edge pre-pressing device is further arranged between the roll mill and the heating assemblies, and the edge pre-pressing device pre-presses the edge of the pole piece before the pole piece enters the roll mill.

[0007] Preferably, the roll mill comprises two main rollers which are rotatably installed on a support and oppositely arranged, motors are respectively fixed on input ends of each main roller, a first hydraulic cylinder is further fixed on the roll mill, and an output end of the first hydraulic cylinder can drive the main roller at the upper end of the roll mill to adjust up and down.

[0008] Preferably, the heating assemblies comprise two heating rollers which are rotatably installed on a support and oppositely arranged, and the cooling assemblies comprise two cooling rollers which are rotatably installed on a support and oppositely arranged.

[0009] Preferably, the circulating oil circuit system comprises a plurality of oil pipes, each of the heating roller and the cooling roller is fixed with a plurality of oil pipes, the roller of the heating roller and the cooling roller is respectively provided with an oil inlet and an oil outlet, the oil inlet and the oil outlet are connected with a circulating conduit through flanges, a first thermocouple and a second thermocouple are fixed and installed on the circulating conduit close to the oil inlet and the oil outlet, and an oil pump, a flow control valve and an oil reservoir are sequentially fixed and installed between the output end and the input end of the circulating conduit.

[0010] Preferably, the edge pre-pressing device comprises a pre-pressing positioning roller and a pre-pressing adjusting roller which are rotatably installed on the support and oppositely arranged, and the edge pre-pressing device further comprises a second hydraulic cylinder fixed on the support, and the output end of the second hydraulic cylinder can drive the pre-pressing adjusting roller to adjust up and down, and the pre-pressing positioning roller and the pre-pressing adjusting roller only act on a 5-10mm wide area of the edge of the pole piece.

[0011] Preferably, the winding device is connected with a driving motor.

[0012] The utility model discloses a heating and cooling device for pole piece, which comprises a frame, a heating roller and a cooling roller rotatably installed on the frame, a winding device, a pre-pressing device and a driving motor. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0014] Figure 1 It is the structure schematic drawing of the utility model;

[0015] Figure 2 It is the circulating oil circuit schematic drawing of the utility model;

[0016] Figure 3 It is the local structure schematic drawing of the utility model.

[0017] In the figure: main roller 1, heating roller 2, cooling roller 3, unwinding device 4, winding device 5, edge pre-pressing roller 6, first hydraulic cylinder 7, circulating oil circuit system 8, oil pipe 9, oil inlet 10, oil outlet 11, first thermocouple 12, oil pump 13, flow control valve 14, oil reservoir 15, second thermocouple 16, pre-pressing positioning roller 17, pre-pressing adjusting roller 18, second hydraulic cylinder 19. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0019] As shown in Figure 1 , Figure 2 , Figure 3 A kind of lithium battery pole piece pair roller combination device, including pair roller machine, heating assembly and cooling assembly are respectively arranged in the two sides of pair roller machine, heating assembly and cooling assembly are respectively connected with circulating oil circuit system 8, two circulating oil circuit systems 8 work independently, respectively provide heating medium for heating assembly, provide cooling medium for cooling assembly, to realize the heating and cooling function to pole piece.

[0020] The side end of heating assembly is provided with unwinding device 4, for placing the pole piece coiled material to be processed and realizing unwinding;The side end of cooling assembly is provided with winding device 5, for winding the pole piece processed, winding device 5 is connected with driving motor, and active winding is realized by motor driving.

[0021] Pair roller machine and heating assembly are provided with edge pre-pressing device, and the device is used for pre-pressing the edge of pole piece before entering pair roller machine. Pair roller machine includes two oppositely arranged main rollers 1 rotatably installed on support, and motor is fixed to the input end of each main roller 1, and the main roller 1 is driven to rotate by motor;First hydraulic cylinder 7 is also fixed on pair roller machine, and the output end of first hydraulic cylinder 7 is connected with the main roller 1 at upper end, so that the main roller 1 at upper end can be adjusted up and down to change the roll gap between two main rollers 1, to adapt to the compaction needs of pole piece of different thicknesses.

[0022] Heating assembly includes two oppositely arranged heating rollers 2 rotatably installed on support, and cooling assembly includes two oppositely arranged cooling rollers 3 rotatably installed on support, and pole piece can pass through between two heating rollers 2 and between two cooling rollers 3 to realize heating and cooling respectively.

[0023] The circulating oil circuit system 8 comprises a plurality of oil pipes 9, each of which is fixed to the inside of each heating roller 2 and cooling roller 3, and is distributed along the axial direction of the roller body to ensure uniform heating or cooling. The heating roller 2 and the cooling roller 3 are respectively provided with an oil inlet 10 and an oil outlet 11, which are connected to the circulating conduit through flanges to form a closed oil circuit. A first thermocouple 12 is fixed to the circulating conduit close to the oil inlet 10, and a second thermocouple 16 is fixed to the circulating conduit close to the oil outlet 11 to detect the temperature of the incoming and outgoing oil. An oil pump 13, a flow control valve 14 and an oil reservoir 15 are sequentially fixed to the circulating conduit from the output end to the input end, the oil pump 13 provides the power for the circulation of the oil, the flow control valve 14 adjusts the flow of the oil to control the heating or cooling speed, and the oil reservoir 15 can store heating oil such as high-temperature heat-conducting oil or cooling oil such as low-temperature cooling liquid according to the demand.

[0024] The edge pre-pressing device comprises a pre-pressing positioning roller 17 and a pre-pressing adjusting roller 18 rotatably mounted on the support, which are oppositely arranged and the roller surfaces thereof correspond to only a 5-10mm wide area of the edge of the pole piece; the edge pre-pressing device further comprises a second hydraulic cylinder 19 fixed to the support, the output end of which is connected to the pre-pressing adjusting roller 18 and can drive the pre-pressing adjusting roller 18 to adjust up and down to change the pre-pressing gap and the pre-pressing degree.

[0025] Actual working process:

[0026] The unwinding device 4 is started to release the pole piece to be processed, the pole piece first enters between the two heating rollers 2 of the heating assembly, the circulating oil circuit system 8 delivers heating oil to the heating roller 2, the heating roller 2 is heated through the oil pipe 9, and then the pole piece is heated to improve the plasticity of the pole piece material;

[0027] The heated pole piece enters the edge pre-pressing device, the 5-10mm area of the edge of the pole piece is slightly pre-pressed by the pre-pressing positioning roller 17 and the pre-pressing adjusting roller 18, and the second hydraulic cylinder 19 can adjust the pre-pressing degree to make the edge material adapt to the pressure deformation in advance;

[0028] The pole piece pre-pressed by the edge pre-pressing device enters the calender, the two main rollers 1 rotate under the drive of the motor, the first hydraulic cylinder 7 adjusts the position of the upper main roller 1, the two main rollers 1 apply a preset pressure on the pole piece, and the compaction is completed;

[0029] The compacted pole piece enters between the two cooling rollers 3 of the cooling assembly, the circulating oil circuit system 8 delivers cooling oil to the cooling roller 3, and the pole piece is cooled and shaped through the oil pipe 9;

[0030] Finally, the pole piece cooled and shaped is wound by the winding device 5 under the drive of the driving motor.

[0031] During the whole process, the circulating oil circuit system 8 monitors the oil temperature in real time through the first thermocouple 12 and the second thermocouple 16, and adjusts the oil flow through the flow control valve 14, so as to ensure the stable heating and cooling effect.

[0032] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lithium battery pole piece pair roller assembly apparatus, characterized by, The application relates to a roll mill, which is provided with heating and cooling assemblies on two sides, and the heating and cooling assemblies are connected with circulating oil circuit systems (8) respectively, the two circulating oil circuit systems (8) can realize heating and cooling functions for the heating and cooling assemblies respectively, the side end of the heating assembly is provided with an unwinding device (4), the side end of the cooling assembly is provided with a winding device (5), an edge pre-pressing device is further arranged between the roll mill and the heating assembly, and the edge pre-pressing device pre-presses the edge of a pole piece before the pole piece enters the roll mill; the unwinding device (4) can unwind the pole piece, and the pole piece passes through the working zones of the heating assembly, the edge pre-pressing device, the roll mill and the cooling assembly in sequence and is wound by the winding device (5).

2. The lithium battery pole piece pair roller assembly apparatus of claim 1, wherein, The roll mill comprises two main rollers (1) which are rotatably arranged on a support and oppositely arranged, and a motor is fixed on the input end of each main roller (1); a first hydraulic cylinder (7) is further fixed on the roll mill, and the output end of the first hydraulic cylinder (7) can drive the main roller (1) at the upper end of the roll mill to adjust up and down.

3. The lithium battery pole piece pair roller assembly apparatus of claim 1, wherein, The heating assembly comprises two heating rollers (2) which are rotatably arranged on a support and oppositely arranged, and the cooling assembly comprises two cooling rollers (3) which are rotatably arranged on a support and oppositely arranged.

4. The lithium battery pole piece pair roller assembly apparatus of claim 3, wherein, The circulating oil circuit system (8) comprises a plurality of oil pipes (9), a plurality of oil pipes (9) are fixed in each heating roller (2) and cooling roller (3) respectively, an oil inlet (10) and an oil outlet (11) are arranged on the rollers of the heating roller (2) and the cooling roller (3) respectively, the oil inlet (10) and the oil outlet (11) are connected with circulating pipes through flanges, a first thermocouple (12) and a second thermocouple (16) are fixed and arranged on the circulating pipes close to the oil inlet (10) and the oil outlet (11) respectively, and an oil pump (13), a flow control valve (14) and an oil storage device (15) are sequentially fixed between the output end and the input end of the circulating pipes.

5. The lithium battery pole piece pair roller assembly apparatus of claim 1, wherein, The edge pre-pressing device comprises a pre-pressing positioning roller (17) and a pre-pressing adjusting roller (18) which are rotatably arranged on a support and oppositely arranged, and a second hydraulic cylinder (19) is further fixed on the support, the output end of the second hydraulic cylinder (19) can drive the pre-pressing adjusting roller (18) to adjust up and down, and the pre-pressing positioning roller (17) and the pre-pressing adjusting roller (18) only act on a 5-10mm wide area of the edge of the pole piece.

6. The lithium battery pole piece pair roller assembly apparatus of claim 1, wherein, The winding device (5) is connected with a driving motor.

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