New energy commercial vehicle lithium battery pole piece processing method

Abstract

The invention discloses a new energy commercial vehicle lithium battery pole piece processing method, and belongs to the technical field of battery processing. Comprising the following steps: S1, raw material preparation and treatment: drying a positive electrode material and a negative electrode material of the lithium battery to reduce the water content of the materials; s2, pole piece coating treatment: uniformly coating a current collector with the coating prepared in the step S1 through a coating machine; s3, pole piece drying and compaction treatment: drying the coated pole piece to remove a solvent in the slurry, and compacting the dried pole piece through a roller press; according to the new energy commercial vehicle lithium battery pole piece processing method, during use, when the pole pieces with different thicknesses and different widths are subjected to rolling treatment, the abrasion state of a pressing roller can be balanced in time, so that the abrasion of the surface of the pressing roller is consistent, and then the subsequent pole piece processing quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of battery processing technology, and in particular to a method for processing pole pieces of lithium batteries for new energy commercial vehicles. Background Art

[0002] With the world's increasing emphasis on environmental protection and strict restrictions on exhaust emissions from traditional fuel vehicles, new energy commercial vehicles have received widespread attention as a sustainable transportation solution. Pure electric commercial vehicles have zero exhaust emissions during driving, which can greatly reduce the degree of environmental pollution compared to traditional diesel commercial vehicles. This has led to a sharp increase in the market demand for lithium batteries for new energy commercial vehicles, and in turn has put forward higher requirements for the efficiency and quality of lithium battery electrode processing. As the core component of the battery, the quality of lithium battery electrode directly determines the performance of the battery. Lithium battery electrode needs to be compacted during the processing to increase the density and strength of the electrode. The compaction process will be carried out using a roller press.

[0003] However, the existing processing of new energy commercial vehicle lithium battery pole pieces still has the following problems: the pole pieces are compacted by a rolling device, and the thickness, width and other parameters required for pole pieces with different production requirements are different. The rollers of the roller press directly perform rolling processing when compacting pole pieces of different thicknesses and widths; however, when rolling pole pieces of different thicknesses, thicker pole pieces require higher pressure to achieve the expected compaction effect. The thick pole pieces are more deformed during the rolling process, and the pressure transferred to the surface of the roller is correspondingly greater. This greater pressure will cause the rolled part of the roller to wear more severely, while the unrolled part has relatively less wear because there is no such change in friction caused by the change in pole piece thickness, which in turn leads to The degree of wear on the surface of the pressure roller is inconsistent. When the pole pieces of different widths are subsequently rolled, the worn pressure roller can no longer provide uniform pressure distribution when rolling the pole pieces. A depression may appear in the middle of the worn pressure roller, which makes the surface of the pressure roller itself uneven during the rolling process of pole pieces of different widths, resulting in uneven thickness of the pole pieces. The wear of the rolled part leads to uneven pressure transmission, and the degree of compaction at different positions of the pole piece will be different, which in turn causes inconsistent pole piece density. During the use of the battery, inconsistent pole piece density may cause local overheating, shortened battery life and other problems. Therefore, when pole pieces of different thicknesses or widths need to be rolled during use, the loss of the pressure roller surface needs to be consistent to avoid affecting the processing quality.

[0004] Therefore, this application provides a method for processing lithium battery pole pieces for new energy commercial vehicles to meet the needs. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for processing pole pieces of lithium batteries for new energy commercial vehicles, so as to solve the problem that the existing method for processing pole pieces of lithium batteries for new energy commercial vehicles on the market proposed in the above-mentioned background technology ignores the problem that when rolling pole pieces of different thicknesses and widths, the wear state of the roller itself is inconsistent, thereby affecting the quality of subsequent pole piece processing.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A method for processing a new energy commercial vehicle lithium battery pole piece, the method comprising the following steps:

[0008] S1. Raw material preparation and processing: Dry the positive and negative electrode materials of the lithium battery to reduce the water content of the materials, then screen the positive and negative electrode materials to ensure uniform particle size, and then make the adhesive and additives into glue, and then mix the glue with the main materials of the positive and negative electrodes to form the coating;

[0009] S2, electrode coating treatment: the coating prepared in S1 is evenly coated on the current collector through a coating machine. The coating thickness is determined according to the battery design requirements.

[0010] S3, electrode drying and compaction treatment: drying the coated electrode to remove the solvent in the slurry, and compacting the dried electrode by a roller press;

[0011] S4. Pole sheet cutting and quality processing: According to the size requirements of new energy commercial vehicle lithium batteries, the compacted pole sheets are cut and finally the cut pole sheets are quality inspected.

[0012] Optionally, the roller press includes a machine body, a group of pressure rollers are provided inside the machine body, and bearings at both ends of the pressure rollers are connected to sliders, and the sliders are slidably connected to vertical grooves opened on the left and right inner walls of the machine body, and laser detectors are installed at equal intervals on the top of the machine body, and bearings in the vertical grooves on the left and right sides of the machine body are connected to screws, the outside of the screws is threadedly connected to the sliders, and the bottoms of the screws on both sides are connected by sprocket mechanisms, and the top of the right screw is connected to the first motor output end installed in the inner wall of the machine body, and vertical plates are fixed on the opposite surfaces of the sliders on the upper and lower sides, and the side surfaces of the vertical plates are slidably connected to guide plates, and the external sliding sleeve of the guide plate is provided with a mounting plate, and the mounting plate is connected to a rubber grinding disc via a first electric push rod, and the rubber grinding disc fits the outer side of the pressure roller. At both ends, a second motor is installed on the outer side of the vertical plate, and the output end of the second motor is connected to one of the gear sets, and the other of the gear sets is installed on the outer side of the shaft of the pressure roller; a thickness adjustment component, the thickness adjustment component is arranged between the upper and lower mounting plates and in the middle of the vertical slot, and the thickness adjustment component adjusts the spacing and surface wear status of the pressure rollers according to the thickness of the roller-pressed pole piece; a width adjustment component, the width adjustment component is symmetrically arranged on the front and rear sides of the pressure roller, and the width adjustment component adjusts the horizontal contact length of the rubber grinding disc according to the width of the roller-pressed pole piece; a real-time compensation component, the real-time compensation component is symmetrically arranged on the bottom of the rubber grinding disc and the front and rear inner walls of the machine body, and the real-time compensation component balances the wear of the unrolled part of the pressure roller in real time according to the detection results of the laser detector.

[0013] Optionally, the thickness adjustment assembly includes a connecting tube arranged between the upper and lower mounting plates, the top and bottom of the connecting tube are slidably connected to a push plate, the interior of the push plate is set to be hollow, and a sliding column is slidably connected to the push plate, and the outer end of the sliding column is fixedly connected to the mounting plate.

[0014] Optionally, a first electromagnet is installed on the inner wall of the push plate, the sliding column is set to a magnetic material, the interior of the push plate is connected to the interior of the fixed cylinder through a connecting tube, the upper and lower sides of the fixed cylinder are sealed and slidably connected with piston plates, and the upper and lower piston plates are respectively fixedly connected to the outside of the upper and lower sliders.

[0015] Optionally, the width adjustment assembly includes a second electric push rod installed on the top of the inner wall on the left and right sides of the machine body, and a limit frame is fixed to the end of the second electric push rod. The limit frame is set to an inverted "U" shape structure, and the limit frame is symmetrically arranged on the left and right sides of the outside of the pressure roller.

[0016] Optionally, a connecting rod is fixed to the bottom of the limit frame, and the connecting rod is set to an eccentric "Z"-shaped structure. The top of the connecting rod is fixedly connected to the front and rear external sides of the connecting tube, and the connecting rod drives the rubber grinding disc through the connecting tube to form a horizontal sliding structure.

[0017] Optionally, the rubber grinding disc is configured as a "V"-shaped structure as a whole, the side of the rubber grinding disc close to the edge of the pressure roller is configured to be separated, and an embedment is provided at the end of the diverging side of the rubber grinding disc. The rubber grinding disc is slidably connected to the slide groove of the arc-shaped slide rail, and the arc-shaped slide rail is fixed to the top of the guide plate.

[0018] Optionally, the side of the rubber grinding disc close to the edge of the pressure roller always remains flush with the edge of the pressure roller, and the arc-shaped slide guides the rubber grinding disc to fork one side for arc sliding. The rubber grinding disc forms a horizontal width adjustment structure through the mounting plate and the arc-shaped slide.

[0019] Optionally, the real-time compensation component includes a third electric push rod symmetrically hinged on the inner walls of the front and rear sides of the body, the outer side of the third electric push rod is fixedly connected to the sleeve, a sliding rod is slidably connected in the sleeve, and the end of the sliding rod is hingedly connected to the bottom of the side where the rubber grinding plate is diverged.

[0020] Optionally, a second electromagnet is installed on the inner wall of the sleeve, and the sliding rod is set to a magnetic material. After the sliding rod slides, it is positioned and locked by the second electromagnet.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects: when roller-pressing pole pieces of different thicknesses and widths, the wear state of the roller itself can be balanced in a timely manner, so that the wear of the roller surface is consistent, thereby ensuring the quality of subsequent pole piece processing. The specific contents are as follows:

[0022] In the above scheme, through the thickness adjustment component, when the thickness of the processed electrode changes, the mounting plate will synchronously drive the sliding column and the push plate to slide out of the connecting tube, extend the distance between the upper and lower rubber grinding discs, and adjust it with the pressure roller, and the slider will drive the piston plate to slide synchronously in the fixed tube, push the sliding column to slide outside the push plate, drive the mounting plate and the rubber grinding disc to slide, so that the rubber grinding disc can synchronously adjust the tightness of the contact between the rubber grinding disc and the pressure roller as the thickness of the rolled electrode changes. After the pressure roller is running, the wear conditions of the unrolled parts on both sides and the rolled part in the middle are balanced.

[0023] Through the width adjustment component, when processing pole pieces of different thicknesses, the second electric push rod drives the limit frames on both sides to move, the connecting rod drives the connecting cylinder to move, and the connecting cylinder drives the mounting plate to slide through the sliding column. When the rubber grinding disc is driven by the mounting plate to move toward the two end edges of the pressure roller, the embedded blocks on the rubber grinding disc slide along the slideway of the arc slide rail under the action of the extrusion force, thereby wrapping the forked part of the rubber grinding disc around the outside of the pressure roller, adjusting the horizontal length of the rubber grinding disc to adapt to pole pieces of different widths, keeping the entire contact surface of the rubber grinding disc in contact with the pressure roller, avoiding inconsistent wear of the rubber grinding disc itself and affecting the balance of wear on the surface of the pressure roller, and further maintaining uniform wear of all parts of the pressure roller itself.

[0024] By setting up a real-time compensation component, during the contact between the rubber grinding disc and the pressure roller, the laser detector monitors the degree of wear on the surface of the pressure roller in real time, and promptly fine-tunes the tightness of the fit between the rubber grinding disc and the pressure roller surface. If there is uneven wear on the pressure roller surface again, the third electric push rod pushes the rubber grinding disc through the sleeve and the sliding rod, and adjusts the tightness of the fit between the rubber grinding disc and the pressure roller in real time to balance the wear in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and enable those skilled in the art to make and use the invention.

[0026] Figure 1 This is a schematic diagram of the overall structure of the roller press of the present invention;

[0027] Figure 2 This is a schematic diagram of the front cross-section structure of the machine body of the present invention;

[0028] Figure 3 This is a schematic diagram of the internal structure of the machine body of the present invention;

[0029] Figure 4 This is a schematic structural diagram of the pressure roller driving component of the present invention;

[0030] Figure 5 This is a schematic diagram of the connection structure of the slider, vertical plate, guide plate and mounting plate of the present invention;

[0031] Figure 6 This is a schematic diagram of the single-sided distribution structure of the mounting plate and the rubber grinding disc of the present invention;

[0032] Figure 7 This is a schematic diagram of the connection structure of the limit frame, connecting rod and connecting cylinder of the present invention;

[0033] Figure 8 This is a schematic diagram of the front cross-section structure of the connecting cylinder, push plate and sliding column of the present invention;

[0034] Figure 9 This is a schematic diagram of the structure of the vertical plate, mounting plate, rubber grinding disc and arc-shaped slide rail of the present invention;

[0035] Figure 10 This is a schematic diagram of the connection structure between the rubber grinding disc and the arc-shaped chute of the present invention;

[0036] Figure 11 For the present invention Figure 2 A in the middle is an enlarged structural diagram;

[0037] Figure 12 For the present invention Figure 3 The enlarged structural diagram at B in the middle;

[0038] Figure 13 For the present invention Figure 4 The enlarged structural diagram at C in the middle;

[0039] Figure 14 For the present invention Figure 6 The enlarged structural diagram at D in the middle;

[0040] Figure 15 For the present invention Figure 7 The enlarged structural diagram at E in the middle;

[0041] Figure 16 For the present invention Figure 7 The enlarged structural diagram at F in the middle;

[0042] Figure 17 For the present invention Figure 9 Enlarged structural diagram at G in the middle.

[0043] Reference numerals:

[0044] 1. Machine body; 2. Pressure roller; 3. Slider; 4. Vertical slot; 5. First motor; 6. Screw; 7. Second motor; 8. Gear set; 9. Vertical plate; 10. Guide plate; 11. Mounting plate; 12. First electric push rod; 13. Rubber grinding disc; 14. Laser detector; 15. Thickness adjustment assembly; 151. Connecting cylinder; 152. Push plate; 153. Slide column; 154. First electromagnet; 155. Fixed cylinder; 156. Piston plate; 16. Width adjustment assembly; 161. Second electric push rod; 162. Limiting frame; 163. Connecting rod; 164. Arc slide rail; 17. Real-time compensation assembly; 171. Third electric push rod; 172. Sleeve; 173. Slide rod; 174. Second electromagnet.

[0045] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0046] The following describes in detail a method for processing a lithium battery electrode for a new energy commercial vehicle provided by the present invention, in conjunction with the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may also adopt other alternatives for implementing certain known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0047] It should be noted that references in the specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes such specific features, structures, or characteristics. In addition, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0048] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0049] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” means not only “directly on” something but also includes the meaning of “on” something with intervening features or layers, and the “on” or “above” means not only “on” or “above” something but also includes the meaning of “on” or “above” something with no intervening features or layers.

[0050] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.

[0051] like Figures 1 to 11 As shown, an embodiment of the present invention provides a method for processing a pole piece of a lithium battery for a new energy commercial vehicle. The method for processing a pole piece of a lithium battery for a new energy commercial vehicle comprises the following steps:

[0052] S1. Raw material preparation and processing: Dry the positive and negative electrode materials of the lithium battery to reduce the water content of the materials, then screen the positive and negative electrode materials to ensure uniform particle size, and then make the adhesive and additives into glue, and then mix the glue with the main materials of the positive and negative electrodes to form the coating;

[0053] S2, electrode coating treatment: the coating prepared in S1 is evenly coated on the current collector through a coating machine. The coating thickness is determined according to the battery design requirements.

[0054] S3, electrode drying and compaction treatment: drying the coated electrode to remove the solvent in the slurry, and compacting the dried electrode by a roller press;

[0055] S4. Pole sheet cutting and quality processing: According to the size requirements of new energy commercial vehicle lithium batteries, the compacted pole sheets are cut and finally the cut pole sheets are quality inspected.

[0056] like Figures 1 to 17 As shown, the roller press includes a body 1, a group of pressure rollers 2 are arranged inside the body 1, and sliders 3 are connected to the bearings at both ends of the pressure rollers 2. The sliders 3 are slidably connected to the vertical slots 4 opened on the left and right inner walls of the body 1, and laser detectors 14 are installed at equal intervals on the top of the body 1. Screws 6 are connected to the bearings in the vertical slots 4 on the left and right sides of the body 1, and the outside of the screws 6 is threadedly connected to the sliders 3. The bottoms of the screws 6 on both sides are connected by a sprocket mechanism, and the top of the right screw 6 is connected to the output end of the first motor 5 installed in the inner wall of the body 1. Vertical plates 9 are fixed on the opposite surfaces of the sliders 3 on the upper and lower sides, and the side surfaces of the vertical plates 9 are slidably connected to guide plates 10. The external sliding sleeve of the guide plate 10 is provided with a mounting plate 11, and a rubber grinding disc 13 is connected to the mounting plate 11 through a first electric push rod 12. The rubber grinding disc 13 fits the outer side of the pressure roller 2 At both ends, a second motor 7 is installed on the outer side of the vertical plate 9, and the output end of the second motor 7 is connected to one of the gear sets 8, and the other of the gear sets 8 is installed on the outer side of the shaft of the pressure roller 2; a thickness adjustment component 15, the thickness adjustment component 15 is arranged between the upper and lower side mounting plates 11 and in the middle of the vertical slot 4, and the thickness adjustment component 15 adjusts the spacing and surface wear state of the pressure roller 2 according to the thickness of the rolled pole piece; a width adjustment component 16, the width adjustment component 16 is symmetrically arranged on the front and rear sides of the pressure roller 2, and the width adjustment component 16 adjusts the horizontal contact length of the rubber grinding disc 13 according to the width of the rolled pole piece; a real-time compensation component 17, the real-time compensation component 17 is symmetrically arranged on the bottom of the rubber grinding disc 13 and the front and rear inner walls of the machine body 1, and the real-time compensation component 17 balances the wear of the unrolled part of the pressure roller 2 in real time according to the detection result of the laser detector 14.

[0057] First, the overall use process of the roller press is introduced. When the pole piece is rolled, the second motor 7 drives the pressure roller 2 through the gear set 8. The pressure roller 2 compacts the pole piece, and the laser detector 14 detects the surface wear condition of the pressure roller 2 in real time. When rolling pole pieces of different thicknesses, the first motor 5 drives the slider 3 to slide in the vertical groove 4 through the screw 6, thereby changing the distance between the upper and lower pressure rollers 2. At the same time, the vertical plate 9 drives the guide plate 10 and the mounting plate 11 to move vertically, so that the rubber grinding disc 13 maintains a fit with the pressure roller 2, and the thickness adjustment component 15 is adjusted accordingly. When the thickness adjustment component 15 is adjusted, the rubber grinding disc 13 gradually increases with the increase of the rolling thickness. The rubber grinding disc 13 and the pressure roller 2 are gradually improved. The initial fitting tightness can balance the wear of the entire outer surface of the pressing roller 2 and keep the wear consistent. When rolling pole pieces of different thicknesses, the width adjustment component 16 can adjust the horizontal length of the rubber grinding disc 13 according to the width of the pole piece, so as to keep the wear on the surface of the pressing roller 2 consistent regardless of whether the pressing roller 2 is rolling pole pieces of different thicknesses or pole pieces of different widths, thereby avoiding the problem of large differences in the wear on the surface of the pressing roller 2 affecting the subsequent pole piece rolling quality. The real-time compensation component 17 can make fine adjustments in real time according to the surface wear of the pressing roller 2 while making basic adjustments, thereby further improving the thickness uniformity, smooth surface and consistent pole piece density of the pole piece when the pressing roller 2 is used, thereby improving the safety of battery use.

[0058] like Figure 2 、 Figure 3 、 Figures 6 to 8 、 Figures 11 to 13 and Figure 16 As shown, the thickness adjustment component 15 includes a connecting tube 151 arranged between the upper and lower mounting plates 11, and the top and bottom of the connecting tube 151 are both connected to a push plate 152 through a spring sliding connection, and the interior of the push plate 152 is set to be hollow, and a sliding column 153 is slidably connected to the push plate 152, and the outer end of the sliding column 153 is fixedly connected to the mounting plate 11, and a first electromagnet 154 is installed on the inner wall of the push plate 152, and the sliding column 153 is set to a magnetic material. The interior of the push plate 152 is connected to the interior of the fixed tube 155 through a connecting pipe, and the upper and lower sides of the fixed tube 155 are both connected to the piston plate 156 through a spring seal and sliding connection, and the upper and lower piston plates 156 are respectively fixedly connected to the outside of the upper and lower sliders 3.

[0059] By providing a thickness adjustment component 15, when rolling the electrodes of different thicknesses, when the pressure roller 2 adjusts the spacing, the mounting plate 11 will synchronously drive the slide column 153 and the push plate 152 to slide out of the connecting cylinder 151. At this time, the first electromagnet 154 is in the energized state, and the slide column 153 and the push plate 152 move synchronously, thereby extending the spacing between the upper and lower rubber grinding discs 13 so that it can be adjusted with the pressure roller 2. When the pressure roller 2 adjusts the spacing, the slider 3 drives the piston plate 156 to slide synchronously in the fixed cylinder 155. , and then the oil in the fixed cylinder 155 is transported to the inside of the push plate 152 through the connecting pipe. At this time, the first electromagnet 154 is powered off, and the injected oil will push the sliding column 153 to slide to the outside of the push plate 152. After the sliding column 153 moves, it pushes the mounting plate 11 and the rubber grinding disc 13 to slide, so that the rubber grinding disc 13 can adjust the contact tightness between the rubber grinding disc 13 and the pressure roller 2 synchronously with the change of the thickness of the rolled pole piece. After the pressure roller 2 is running, the wear conditions of the unrolled parts on both sides and the rolled part in the middle are balanced, so that the surface wear is consistent.

[0060] like Figures 1 to 7 、 Figures 9 to 12 、 Figure 14 、 Figure 15 and Figure 17 As shown, the width adjustment assembly 16 includes a second electric push rod 161 installed on the top of the inner wall on the left and right sides of the body 1, and the end of the second electric push rod 161 is fixed with a limit frame 162, and the limit frame 162 is set to an inverted "U"-shaped structure. The limit frame 162 is symmetrically arranged on the left and right sides of the outside of the pressure roller 2, and a connecting rod 163 is fixed to the bottom of the limit frame 162. The connecting rod 163 is set to an eccentric "Z"-shaped structure, and the top of the connecting rod 163 is fixedly connected to the front and rear sides of the connecting tube 151. The connecting rod 163 drives the rubber grinding disc 13 through the connecting tube 151 to form a horizontal sliding structure.

[0061] By setting the width adjustment component 16, when rolling the pole pieces of different widths, the second electric push rod 161 drives the limit frames 162 on both sides to move, so that the limit frames 162 on both sides are always at the edges of the pole pieces, that is, the width of the pole piece will be the spacing between the limit frames 162 on both sides. When the width changes, the spacing of the limit frames 162 will change accordingly. After the position of the limit frame 162 changes, it drives the connecting rod 163 at the bottom to move accordingly. After the connecting rod 163 moves, it drives the connecting tube 151 to move synchronously. The connecting tube 151 drives the mounting plate 11 to slide on the guide plate 10 through the sliding column 153, thereby adjusting the horizontal length of the rubber grinding disc 13 to adapt to pole pieces of different widths. The rubber grinding disc 13 as a whole always maintains a fit state with the non-rolled part of the pressure roller 2, thereby maintaining wear synchronization.

[0062] like Figure 10 and Figure 11 、 Figure 14 、 Figure 15 and Figure 17 As shown, the rubber grinding disc 13 is configured as a "V"-shaped structure as a whole, and the side of the rubber grinding disc 13 close to the edge of the pressure roller 2 is configured to be separated, and the end of the diverging side of the rubber grinding disc 13 is provided with an insert, and the rubber grinding disc 13 is slidably connected to the slide groove of the arc-shaped slide rail 164, and the arc-shaped slide rail 164 is fixed to the top of the guide plate 10. The side of the rubber grinding disc 13 close to the edge of the pressure roller 2 is always kept flush with the edge of the pressure roller 2, and the arc-shaped slide rail 164 guides the diverging side of the rubber grinding disc 13 to slide in an arc, and the rubber grinding disc 13 forms a horizontal width adjustment structure through the mounting plate 11 and the arc-shaped slide rail 164.

[0063] By setting a width adjustment component 16, when the rubber grinding disc 13 is driven by the mounting plate 11 to move toward the two end edges of the pressure roller 2, the embedded blocks on the rubber grinding disc 13 slide along the slideway of the arc-shaped slide rail 164 under the action of the extrusion force, thereby wrapping the divergent part of the rubber grinding disc 13 around the outside of the pressure roller 2, keeping the entire contact surface of the rubber grinding disc 13 in contact with the pressure roller 2, avoiding the uneven wear of the rubber grinding disc 13 itself and affecting the balance of the wear on the surface of the pressure roller 2, and changing the horizontal length of the rubber grinding disc 13 with the change of the pole piece width, thereby maintaining the loss of the unrolled part of the pressure roller 2, and further maintaining the uniform wear of the entire parts of the pressure roller 2 itself, to cope with the processing of pole pieces of different specifications, so that the thickness of the pole piece rolled by the pressure roller 2 is uniform, the surface is flat, and the pole piece density is consistent when the pressure roller 2 is used, thereby improving the safety of battery use.

[0064] like Figures 3 to 7 、 Figures 9 to 11 、 Figure 14 、 Figure 15 and Figure 17 As shown, the real-time compensation component 17 includes a third electric push rod 171 symmetrically hinged on the inner walls of the front and rear sides of the body 1, the outer side of the third electric push rod 171 is fixedly connected to the sleeve 172, and a slide rod 173 is slidably connected in the sleeve 172. The end of the slide rod 173 is hingedly connected to the bottom of the diverging side of the rubber grinding disc 13, and a second electromagnet 174 is installed on the inner wall of the sleeve 172. The slide rod 173 is set to a magnetic material, and the slide rod 173 is positioned and locked by the second electromagnet 174 after sliding.

[0065] By setting up a real-time compensation component 17, during the contact between the rubber grinding disc 13 and the pressure roller 2, the laser detector 14 monitors the degree of wear on the surface of the pressure roller 2 in real time, and promptly fine-tunes the tightness of the fit between the rubber grinding disc 13 and the surface of the pressure roller 2. When adjusting the thickness and width, the slide bar 173 slides normally in the sleeve 172, and the third electric push rod 171 rotates normally with the adjustment operation. After the adjustment, the second electromagnet 174 is energized, and the sleeve 172 and the slide bar 173 are adsorbed and locked. During operation, if the surface of the pressure roller 2 is unevenly worn again, the third electric push rod 171 pushes the rubber grinding disc 13 through the sleeve 172 and the slide bar 173, and adjusts the tightness of the fit between the rubber grinding disc 13 and the pressure roller 2 in real time, and balances the wear in time.

[0066] The working principle of the technical solution provided by the present invention is as follows:

[0067] After the pressure roller 2 is running, it compacts the electrode piece, and the laser detector 14 detects the surface wear condition of the pressure roller 2 in real time. When the electrode pieces of different thicknesses are subjected to roller pressing, the first motor 5 drives the slider 3 to slide in the vertical groove 4 through the screw 6, thereby changing the distance between the upper and lower pressure rollers 2. When the pressure roller 2 adjusts the distance, the mounting plate 11 will synchronously drive the sliding column 153 and the push plate 152 to slide out of the connecting tube 151. At this time, the first electromagnet 154 is in the energized state, and the sliding column 153 and the push plate 152 move synchronously, thereby extending the distance between the upper and lower rubber grinding discs 13, so that it can be adjusted with the pressure roller 2, and the pressure When the roller 2 adjusts the spacing, the slider 3 drives the piston plate 156 to slide synchronously in the fixed cylinder 155, and then transports the oil in the fixed cylinder 155 to the inside of the push plate 152 through the connecting pipe. At this time, the first electromagnet 154 is powered off, and the injected oil will push the sliding column 153 to slide to the outside of the push plate 152. After the sliding column 153 moves, it pushes the mounting plate 11 and the rubber grinding disc 13 to slide, so that the rubber grinding disc 13 can synchronously adjust the tightness of the contact between the rubber grinding disc 13 and the pressure roller 2 as the thickness of the rolled pole piece changes. After the pressure roller 2 is running, the wear conditions of the unrolled parts on both sides and the rolled part in the middle are balanced, so that the surface wear is consistent.

[0068] Secondly, when rolling pole pieces of different widths, the second electric push rod 161 drives the limit frames 162 on both sides to move, so that the limit frames 162 on both sides are always at the edges of the pole pieces, that is, the width of the pole piece will be the spacing between the limit frames 162 on both sides. When the width changes, the spacing between the limit frames 162 will change accordingly. After the position of the limit frame 162 changes, it drives the connecting rod 163 at the bottom to move accordingly. After the connecting rod 163 moves, it drives the connecting cylinder 151 to move synchronously. The connecting cylinder 151 drives the mounting plate 11 to slide on the guide plate 10 through the sliding column 153, thereby adjusting the horizontal length of the rubber grinding disc 13 to adapt to pole pieces of different widths. The rubber grinding disc 13 as a whole always maintains a state of contact with the part not rolled by the pressure roller 2. In order to maintain synchronization of wear, when the rubber grinding disc 13 is driven by the mounting plate 11 to move toward the two end edges of the pressure roller 2, the inlay on the rubber grinding disc 13 slides along the slide of the arc-shaped slide rail 164 under the action of the extrusion force, thereby wrapping the diverging part around the outside of the pressure roller 2, keeping the entire contact surface of the rubber grinding disc 13 in contact with the pressure roller 2, avoiding inconsistent wear of the rubber grinding disc 13 itself and affecting the balance of wear on the surface of the pressure roller 2, and changing the horizontal length of the rubber grinding disc 13 as the width of the pole piece changes, thereby maintaining the loss of the unrolled part of the pressure roller 2, and the wear of the various parts of the pressure roller 2 itself is uniform, so that the thickness of the pole piece rolled by the pressure roller 2 is uniform, the surface is flat, and the pole piece density is consistent when the pressure roller 2 is in use.

[0069] At the same time, real-time compensation can be performed during the rolling process. The laser detector 14 monitors the degree of wear on the surface of the pressure roller 2 in real time, and promptly fine-tunes the tightness of the rubber grinding disc 13 and the surface of the pressure roller 2. When adjusting the thickness and width, the slide bar 173 slides normally in the sleeve 172, and the third electric push rod 171 rotates normally with the adjustment operation. After the adjustment, the second electromagnet 174 is energized, and the sleeve 172 and the slide bar 173 are adsorbed and locked. During operation, if the surface of the pressure roller 2 is unevenly worn again, the third electric push rod 171 pushes the rubber grinding disc 13 through the sleeve 172 and the slide bar 173, and adjusts the tightness of the rubber grinding disc 13 and the pressure roller 2 in real time, balances the wear in time, improves the quality of the electrode processing, and thereby improves the safety of battery use in the future.

[0070] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0071] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0072] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for processing pole pieces of lithium batteries for new energy commercial vehicles, characterized by: The method for processing a lithium battery pole piece for a new energy commercial vehicle comprises the following steps: S1. Raw material preparation and processing: Dry the positive and negative electrode materials of the lithium battery to reduce the water content of the materials, then screen the positive and negative electrode materials to ensure uniform particle size, and then make the adhesive and additives into glue, and then mix the glue with the main materials of the positive and negative electrodes to form the coating; S2, electrode coating treatment: the coating prepared in S1 is evenly coated on the current collector through a coating machine. The coating thickness is determined according to the battery design requirements. S3, electrode drying and compaction treatment: drying the coated electrode to remove the solvent in the slurry, and compacting the dried electrode by a roller press; S4. Pole sheet cutting and quality processing: According to the size requirements of new energy commercial vehicle lithium batteries, the compacted pole sheets are cut and finally the cut pole sheets are quality inspected.

2. The method for processing a new energy commercial vehicle lithium battery electrode according to claim 1, characterized in that: The roller press comprises a machine body, the interior of which is provided with a group of pressing rollers, the two ends of the pressing rollers are connected with bearings on slides, the slides are slidably connected to vertical grooves opened on the left and right inner walls of the machine body, and laser detectors are equidistantly installed on the top of the machine body, the left and right vertical grooves of the machine body are both connected with screws with bearings, the outside of the screws is threadedly connected to the slides, the bottoms of the screws on both sides are connected by a sprocket mechanism, the top of the right screw is connected to the output end of the first motor installed in the inner wall of the machine body, vertical plates are fixed on the opposite surfaces of the sliders on the upper and lower sides, the side surfaces of the vertical plates are slidably connected to guide plates, the outside of the guide plates are slidingly sleeved with a mounting plate, and the mounting plate is connected to a rubber grinding disc through a first electric push rod, the rubber grinding disc fits the outer ends of the pressing roller, and a second motor is installed on the outside of the vertical plate, the output end of the second motor is connected to one of the gear sets, and the other of the gear set is installed on the outside of the shaft of the pressing roller; A thickness adjustment component is provided between the upper and lower mounting plates and in the middle of the vertical slot. The thickness adjustment component adjusts the spacing between the pressing rollers and the surface wear state according to the thickness of the rolled electrode sheet; A width adjustment assembly is symmetrically arranged on the front and rear sides of the pressure roller, and the width adjustment assembly adjusts the horizontal contact length of the rubber grinding disc according to the width of the roller pressure electrode; A real-time compensation component is symmetrically arranged on the bottom of the rubber grinding disc and the front and rear inner walls of the machine body. The real-time compensation component balances the wear of the unrolled part of the pressure roller in real time according to the detection results of the laser detector.

3. The method for processing a new energy commercial vehicle lithium battery electrode according to claim 2, characterized in that: The thickness adjustment assembly includes a connecting tube arranged between the upper and lower mounting plates, the top and bottom of the connecting tube are slidably connected to push plates, the interior of the push plate is set to be hollow, and the push plate is slidably connected to a sliding column, and the outer end of the sliding column is fixedly connected to the mounting plate.

4. The method for processing a new energy commercial vehicle lithium battery electrode according to claim 3, characterized in that: A first electromagnet is installed on the inner wall of the push plate, the sliding column is set to a magnetic material, the interior of the push plate is connected to the interior of the fixed cylinder through a connecting tube, the upper and lower sides of the fixed cylinder are sealed and slidably connected with piston plates, and the upper and lower piston plates are respectively fixedly connected to the outside of the upper and lower sliders.

5. The method for processing a new energy commercial vehicle lithium battery electrode according to claim 2, characterized in that: The width adjustment assembly includes a second electric push rod installed on the top of the inner wall on the left and right sides of the machine body, and a limit frame is fixed at the end of the second electric push rod. The limit frame is set as an inverted "U" shape structure, and the limit frame is symmetrically arranged on the left and right sides of the outside of the pressure roller.

6. The method for processing a new energy commercial vehicle lithium battery electrode according to claim 5, characterized in that: A connecting rod is fixed to the bottom of the limit frame, and the connecting rod is set to a "Z"-shaped structure with different surfaces. The top of the connecting rod is fixedly connected to the front and rear sides of the connecting tube. The connecting rod drives the rubber grinding disc through the connecting tube to form a horizontal sliding structure.

7. The method for processing a new energy commercial vehicle lithium battery electrode according to claim 6, characterized in that: The rubber grinding disc is configured as a "V"-shaped structure as a whole, and the side of the rubber grinding disc close to the edge of the pressure roller is configured to be separated. The end of the forked side of the rubber grinding disc is provided with an embedded block, and the rubber grinding disc is slidably connected to the slide groove of the arc-shaped slide rail, and the arc-shaped slide rail is fixed to the top of the guide plate.

8. The method for processing a new energy commercial vehicle lithium battery electrode according to claim 7, characterized in that: The side of the rubber grinding disc close to the edge of the pressure roller always remains flush with the edge of the pressure roller, and the arc-shaped slide guides the rubber grinding disc to slide in an arc shape on one side. The rubber grinding disc forms a horizontal width adjustment structure through the mounting plate and the arc-shaped slide.

9. The method for processing a new energy commercial vehicle lithium battery electrode according to claim 2, characterized in that: The real-time compensation component includes a third electric push rod symmetrically hinged on the front and rear inner walls of the machine body. The outer side of the third electric push rod is fixedly connected to the sleeve. A sliding rod is slidably connected in the sleeve. The end of the sliding rod is hingedly connected to the bottom of the diverging side of the rubber grinding disc.

10. The method for processing pole pieces of lithium batteries for new energy commercial vehicles according to claim 9, characterized in that: A second electromagnet is installed on the inner wall of the sleeve, and the slide bar is made of a magnetic material. After the slide bar slides, it is positioned and locked by the second electromagnet.

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