Battery negative electrode compression molding device

Abstract

The invention belongs to the technical field of lithium battery production, and particularly relates to a battery negative electrode compression molding device which comprises a base and the like. The base is a bearing carrier of the device, the multiple supporting columns are fixedly arranged on the circumferential edge of the top face of the base, and the top frame is fixedly connected between the tops of the multiple supporting columns; the supporting table I is fixedly arranged on the top surface of the base; the second supporting table is fixedly arranged on the top face of the base. Through mutual cooperation of the limiting frame and the limiting plate, external expansion of a coating layer in the pressing process is effectively prevented, the cleanliness of the edge of a battery negative electrode plate is guaranteed, meanwhile, indentation is avoided, the quality of a finished product is improved, fine adjustment of the pressing distance of the pressing frame is achieved in cooperation with an electronic digital display micrometer in the adjusting assembly, and the production efficiency is improved. The pressing effect of the coating layers on the battery negative electrode plates with different thicknesses is ensured, and the quality and the consistency of products are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium battery production, and in particular relates to a battery negative electrode compression molding device. Background Art

[0002] As the global demand for renewable energy and electric vehicles grows, energy storage technologies such as lithium-ion batteries have developed rapidly. In the manufacturing process of lithium-ion batteries, the selection and processing of negative electrode materials have a crucial impact on battery performance. Negative electrode materials are usually composed of graphite, silicon-based materials or other carbon materials. These materials need to go through multiple steps such as mixing, coating, drying, and rolling before they can finally become part of the battery. Among them, the pressing and molding of negative electrode materials is a key link, which directly affects the density, porosity and distribution of active substances in the electrode, and thus affects the energy density, cycle life and charge and discharge performance of the battery.

[0003] After searching, the patent with the authorization announcement number CN117655099B discloses a battery pole piece rolling device, including a fixed block, a fixed frame fixedly connected to the outer wall of the fixed block, a support leg fixedly connected to the bottom surface of the fixed block, a support plate fixedly connected to the bottom surface of the fixed frame, and an adjustment device is set on the fixed block and the fixed frame. Although the device can adjust the distance between the active roller and the driven roller by pushing the pressing block and cooperating with the connecting rod to lift the top block; however, there are still certain limitations in use. During the rolling process, due to uneven pressure distribution, especially the edge area of ​​the electrode, a slight outward expansion phenomenon may occur. At present, some manufacturers adopt the method of leaving blank edges, that is, leaving a certain width of uncoated area at the edge of the pole piece to prevent the coating layer from expanding outward during the rolling process. Although leaving blank edges can solve the problem of edge calendering, these blank edges need to be additionally cut off in the subsequent processing procedures, which not only increases material waste but also increases production costs. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a battery negative electrode compression molding device.

[0005] The present invention provides a battery negative electrode pressing and forming device, comprising a base, a pillar and a top frame, wherein the base is a load-bearing carrier of the device, a plurality of pillars are provided and fixedly arranged at the circumferential edge of the top surface of the base, and the top frame is fixedly connected between the tops of the plurality of pillars; and further comprising: a first support platform, fixedly arranged on the top surface of the base; a second support platform, fixedly arranged on the top surface of the base, wherein the first support platform and the second support platform are spaced at the same height and adapted to each other, and the first support platform and the second support platform are used to support and guide the battery negative electrode material plate; A limit frame is fixedly connected to the table surface of the support platform 1, and the limit frame is used to limit the two side edges of the conveying battery negative electrode material plate, and the lower part of the frame body on both sides of the limit frame along the conveying direction of the battery negative electrode material plate is a through opening; a pressing mechanism is arranged at a position on the top frame corresponding to the support platform 1, and the pressing mechanism is used to press and compact the coating layer (conductive coating and adhesive) of the conveying battery negative electrode material plate on the support platform 1; the pressing mechanism includes: a hydraulic cylinder installed on the top frame; a lifting platform, a telescopic rod installed on the hydraulic cylinder On the top; a pressing frame is fixedly arranged at the bottom of the lifting platform, the pressing frame is located directly above the support platform 1 and does not contact each other, the pressing frame is a hollow frame and is located inside the limiting frame; a limiting member is arranged at the two side frames of the limiting frame along the conveying direction of the battery negative electrode material plate, and the limiting member is used to limit the coating layer on the battery negative electrode material plate; an adjusting component is arranged on the pressing frame, and the adjusting component is arranged on the pressing frame, and the adjusting component is used to finely adjust the downward pressing distance of the pressing frame so that the pressing mechanism can adapt to different The coating layer on the thick battery negative electrode material plate is pressed. When the coating layer of the battery negative electrode material plate is conveyed to the inside of the limit frame, the limit frame is limited at the edge of the coating layer of the battery negative electrode material plate, and the limit frame is lowered and limited at the edge of the coating layer along the conveying direction of the battery negative electrode material plate. After the edges of the coating layer of the battery negative electrode material plate are limited, the hydraulic cylinder is activated to drive the lifting platform and the pressing frame to descend, and the coating layer of the battery negative electrode material plate after limiting is pressed by the pressing frame, so as to prevent the coating layer on the battery negative electrode material plate from expanding outward during the rolling process.

[0006] Preferably, the limiting member includes: guide rods, which are symmetrically fixed to the top of the frame on both sides of the limiting frame along the conveying direction of the battery negative electrode material plate; limiting plates, which are two in number and are slidably installed on the guide rods on the corresponding sides, and the limiting plates are C-shaped plates and are symmetrically distributed on both sides of the pressing frame. A spring 1 is arranged between the limiting plate and the pressing frame, and the spring 1 is located at the top of the pressing frame and supported on the limiting plate on the same side. The bottom surface of the limiting plate is lower than the bottom surface of the pressing frame. When the hydraulic cylinder drives the pressing frame to press down, the limiting plate will be limited to the edge of the coating layer along the conveying direction of the battery negative electrode material plate before the pressing frame, so that the coating layer on the battery negative electrode material plate is stably limited between the two limiting plates.

[0007] Preferably, the lower end plate body of the limiting plate is an arc surface, and a buffer pad is also provided on the lower end arc surface of the limiting plate. The buffer pad of the limiting plate is used to buffer the pressure on the battery negative electrode material plate. When the limiting plate limits the coating layer on the battery negative electrode material plate, it prevents the limiting plate from pressing an indentation on the battery negative electrode material plate and affecting the overall quality of the plate.

[0008] Preferably, the adjusting assembly comprises: an oil tank installed on the top of the pressing frame, the oil tank is filled with hydraulic oil; an electronic digital micrometer is arranged on the top of the pressing frame through a support plate, the electronic digital micrometer is located directly above the oil tank; a piston rod is sealingly and slidably arranged on the oil tank, the micrometer rod of the electronic digital micrometer is connected to the piston rod, the accuracy of the electronic digital micrometer is at the micron level and a variable display screen is provided thereon; two hydraulic pipes are provided and arranged on the top of the pressing frame; oil pipelines are respectively connected between the oil tank and the hydraulic pipes at two locations; an oil valve, an oil valve is installed on the oil pipeline; a pressing block is slidably arranged in the internal interlayer of the pressing frame, the pressing block is H-shaped and its two ends are located inside the limit plate frame at two locations; a connecting rod is provided and fixedly connected to the top surface of the pressing block The two connecting rods on the pressing block respectively penetrate the top surface of the pressing frame and are slidably connected to the hydraulic pipe on the same side. The connecting rod and the hydraulic pipe are sealed and filled with hydraulic oil. When the pressing frame drives the limit plate to press down to the battery negative electrode material plate on the support platform, the limit plate stops squeezing on the battery negative electrode material plate, and the pressing frame stretches the spring to continue to press down until the two ends of the pressing block are synchronously moved down inside the pressing frame and squeezed on the lower frame of the limit plate, so that the pressing frame presses the coating layer on the battery negative electrode material plate to a certain thickness. Therefore, by quantitatively adjusting the electronic digital micrometer, the micrometer rod of the electronic digital micrometer drives the piston rod to move slightly on the oil storage tank, so that the hydraulic oil in the oil storage tank is exchanged with the hydraulic oil between the hydraulic pipe, so as to slightly adjust the position of the pressing block in the pressing frame, and fine-tune the extrusion distance between the pressing block and the limit plate, thereby achieving the effect of fine-tuning the downward pressing distance of the pressing frame.

[0009] Preferably, a interlayer is provided in the frame body of the pressing frame near the bottom pressing surface, a heat conducting plate is provided in the interlayer of the pressing frame, mounting blocks are installed at the openings on both sides of the interlayer of the pressing frame, electric heating tubes are bent and laid between the mounting blocks on both sides, and the electric heating tubes are evenly distributed on the heat conducting plate. When the pressing frame presses the coating layer on the negative electrode material plate of the battery, the electric heating tubes are energized and the heat conducting plate is heated up to transfer heat to the pressing surface of the pressing frame, thereby increasing the pressing density of the coating layer on the negative electrode material plate of the battery, thereby improving the energy density and conductivity of the subsequently assembled battery.

[0010] Preferably, a cooling member is provided on the top frame, and the cooling member is used to quickly cool the heated battery negative electrode material plate, and the cooling member includes: a guide block, which is fixedly connected to one side of the lifting platform through a connecting plate, and a groove is provided inside the guide block; a connecting column, which is slidably arranged on the guide block through the groove; a limiting ring, which is fixedly connected to the upper column of the connecting column, and the limiting ring of the connecting column is placed in the groove of the guide block; a refrigeration frame, which is installed at the lower end of the connecting column, and the refrigeration frame is located directly above the support platform 2 and does not contact each other, and the bottom surfaces of the refrigeration frame and the pressing frame are flush; a semiconductor refrigeration plate, which is arranged inside the refrigeration frame, and the semiconductor refrigeration plate is used to cool the refrigeration frame, and the refrigeration frame descends and contacts the battery negative electrode material plate after hot pressing, and by controlling a certain contact time, the battery negative electrode material plate can be quickly cooled to room temperature, thereby improving the overall production efficiency of the battery negative electrode material plate.

[0011] Preferably, a groove is formed in the lower part of the frame body of the limit plate, a push rod is fixed in the groove of the limit plate, a spring 2 is provided on the periphery of the push rod, the spring 2 is longer than the push rod, a pressure sensor is provided on the top of the spring 2, the pressure sensor extends above the groove of the limit plate and is located on the lower surfaces of both ends of the pressing block, the pressure sensor is used to sense the pressure of the pressing block pressed down to the limit plate, the pressure sensor is electrically connected to the hydraulic cylinder through a built-in controller, and the pressure sensor is synchronously compressed when the pressing block is pressed down to the limit plate, so that the pressure sensor monitors the pressure of the pressing block, and once the pressure of the pressing block exceeds the preset value of the pressure sensor, the pressure sensor will control the hydraulic cylinder to close through the built-in controller to stop the pressing mechanism, so as to avoid excessive pressure on the pressing frame and the pressing block to damage the battery negative electrode plate.

[0012] Preferably, both sides of the pillar are provided with retractable components, and the retractable components are used to retract the battery negative electrode material plate for pressing, and the retractable components include: a mounting plate 1, fixedly connected to the side of the pillar close to the cooling part; a winding roller, rotatably mounted on the mounting plate 1, and used to wind up the pressed battery negative electrode material plate; a servo motor, mounted on the mounting plate 1, and the output shaft of the servo motor is connected to the rotating shaft of the winding roller; a mounting plate 2, fixedly connected to the side of the pillar close to the pressing frame; an unwinding roller, rotatably mounted on the mounting plate 2, and used to unwind the battery negative electrode material plate to be pressed.

[0013] The beneficial effects of the present invention are as follows: 1. The present invention effectively prevents the outward expansion of the coating layer during the pressing process through the mutual cooperation of the limit frame and the limit plate, thereby ensuring the cleanliness of the edge of the battery negative electrode material plate, while avoiding the generation of indentations and improving the quality of the finished product. In conjunction with the electronic digital micrometer in the adjustment component, the pressing distance of the pressing frame can be finely adjusted to ensure the pressing effect of the coating layer on the battery negative electrode material plates of different thicknesses, thereby improving the quality and consistency of the product.

[0014] 2. The present invention can heat and quickly cool the negative electrode material plate of the battery through the electric heating tube in the pressing frame and the semiconductor refrigeration plate of the refrigeration frame, which not only helps to increase the density of the coating layer, but also speeds up the production process and improves production efficiency.

[0015] 3. The present invention can also monitor the downward pressure of the pressing block during the pressing process through a pressure sensor arranged on the limit plate. When the pressure exceeds the preset value, the hydraulic cylinder can be automatically stopped by the controller to avoid damage to the battery negative electrode plate due to excessive pressing, thereby enhancing the safety and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 The figure is a connection diagram of the pillars, top frame, hydraulic cylinder, lifting platform and pressing frame of the present invention.

[0018] Figure 3 It is a schematic diagram of the matching relationship among the limit frame, hydraulic cylinder, lifting platform and pressing frame of the present invention.

[0019] Figure 4 This is a connection diagram of the limit frame, guide rods, limit plates and other components of the present invention.

[0020] Figure 5 It is a three-dimensional structural schematic diagram of specific components of the pressing frame, the adjusting assembly and the limiting member of the present invention.

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the pressing frame, heat conducting plate, mounting block and electric heating tube of the present invention.

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the specific components of the cooling element of the present invention.

[0023] Figure 8 It is a schematic diagram of the matching relationship among the pressing block, the limiting plate, the ejector rod and the pressure sensor of the present invention.

[0024] Fig. 9 It is a connection relationship diagram of the base, support and specific components of the retractable component of the present invention.

[0025] Description of reference numerals: 100: negative electrode plate, 1: base, 2: support, 3: top frame, 4: support platform 1, 41: support platform 2, 5: limit frame, 6: pressing mechanism, 61: hydraulic cylinder, 62: lifting platform, 63: pressing frame, 7: adjustment component, 71: oil storage tank, 72: electronic digital micrometer, 73: piston rod, 74: hydraulic pipe, 75: oil pipeline, 76: oil valve, 77: pressure block, 78: connecting rod, 8: limit member, 81: guide rod, 8 2: limit plate, 83: spring one, 91: heat conduction plate, 92: mounting block, 93: electric heating tube, 10: cooling part, 101: guide block, 102: connecting column, 103: limit ring, 104: refrigeration frame, 105: semiconductor refrigeration plate, 111: push rod, 112: spring two, 113: pressure sensor, 12: retractable assembly, 121: mounting plate one, 122: rewinding roller, 123: servo motor, 124: mounting plate two, 125: unwinding roller. DETAILED DESCRIPTION

[0026] The present invention will now be described more fully below with reference to the accompanying drawings, in which currently preferred embodiments of the present invention are shown. However, the present invention may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and these embodiments fully convey the scope of the present invention to the skilled person.

[0027] Embodiment 1: A battery negative electrode pressing and molding device, such as Figure 1-Figure 4As shown, it includes a base 1, a pillar 2 and a top frame 3. The base 1 is a load-bearing carrier of the device. The pillars 2 are provided with a plurality of pillars and fixedly arranged at the circumferential edge of the top surface of the base 1. The top frame 3 is fixedly connected between the tops of the plurality of pillars 2; it also includes: a support platform 1 4, fixedly arranged on the top surface of the base 1; a support platform 2 41, fixedly arranged on the top surface of the base 1, the support platforms 1 4 and 2 41 are spaced at the same height and adapted to each other, and the support platforms 1 4 and 2 41 are used to support and guide the negative electrode material plate 100 of the battery; a limit frame 5, fixedly connected to the surface of the support platform 1 4, the limit frame 5 is used to limit the two side edges of the conveying battery negative electrode material plate 100, and the lower part of the two side frames of the limit frame 5 along the conveying direction of the battery negative electrode material plate 100 is a through opening; the pressing mechanism 6 is arranged at the position corresponding to the support platform 4 on the top frame 3, and the pressing mechanism 6 is used to compact the coating layer (conductive coating and adhesive) of the conveying battery negative electrode material plate 100 on the support platform 4; the pressing mechanism 6 includes: a hydraulic cylinder 61, installed on the top frame 3; a lifting platform 62, installed on the telescopic rod of the hydraulic cylinder 61; a pressing frame 63, fixedly arranged at the bottom of the lifting platform 62, The pressing frame 63 is located directly above the support platform 4 and does not contact each other. The pressing frame 63 is a hollow frame and is located inside the limit frame 5; the limit members 8 are arranged on the two side frames of the limit frame 5 along the conveying direction of the battery negative electrode material plate 100, and the limit members 8 are used to limit the coating layer on the battery negative electrode material plate 100; the pressing frame 63 is provided with an adjustment component 7, and the adjustment component 7 is arranged on the pressing frame 63. The adjustment component 7 is used to finely adjust the downward pressing distance of the pressing frame 63, so that the pressing mechanism 6 can adapt to the pressing of the coating layer on the battery negative electrode material plate 100 of different thicknesses. When the coating layer of the negative electrode material plate 100 is conveyed to the interior of the limiting frame 5, the limiting frame 5 is limited at the edge of the coating layer of the battery negative electrode material plate 100, and the limiting frame 5 is lowered and limited at the edge of the coating layer along the conveying direction of the battery negative electrode material plate 100, so that the edges of the coating layer of the battery negative electrode material plate 100 are limited, and then the hydraulic cylinder 61 is activated to drive the lifting platform 62 and the pressing frame 63 to descend, and the coating layer of the battery negative electrode material plate 100 after limiting is pressed by the pressing frame 63, so as to prevent the coating layer on the battery negative electrode material plate 100 from expanding outward during the rolling process.

[0028] like Figure 1 , Figure 4 and Figure 5As shown, the adjustment assembly 7 includes: an oil tank 71, which is installed on the top of the pressing frame 63, and the oil tank 71 is filled with hydraulic oil; an electronic digital micrometer 72, which is arranged on the top of the pressing frame 63 through a support plate, and the electronic digital micrometer 72 is located directly above the oil tank 71; a piston rod 73, which is sealed and slidably arranged on the oil tank 71, and the micrometer rod of the electronic digital micrometer 72 is connected to the piston rod 73, and the accuracy of the electronic digital micrometer 72 is at the micron level and a variable display screen is provided on it ; hydraulic pipes 74, two of which are provided and arranged on the top of the pressing frame 63; oil delivery pipes 75, which are respectively connected between the oil storage tank 71 and the hydraulic pipes 74 at the two locations; oil valves 76, oil delivery pipes 75 are each equipped with oil valves 76; a pressing block 77, which is slidably arranged in the inner interlayer of the pressing frame 63, and the pressing block 77 is H-shaped and its two ends are located inside the frame of the limit plates 82 at the two locations; connecting rods 78, which are provided and fixedly connected to the top surface of the pressing block 77, and the two connecting rods 78 on the pressing block 77 respectively penetrate the pressing The top surface of the frame 63 is slidably connected to the hydraulic pipe 74 on the same side, and the connection rod 78 and the hydraulic pipe 74 are sealed and filled with hydraulic oil. When the pressing frame 63 drives the limit plate 82 to press down to the battery negative electrode material plate 100 on the support platform 4, the limit plate 82 stops pressing on the battery negative electrode material plate 100, and the pressing frame 63 stretches the spring 83 to continue pressing down until the two ends of the pressing block 77 that moves downward synchronously inside the pressing frame 63 are pressed on the lower frame of the limit plate 82, so that the pressing frame 63 is pressed against the lower frame of the limit plate 82. The coating layer on the battery negative electrode plate 100 is pressed to a certain thickness, and thus the electronic digital micrometer 72 is quantitatively adjusted. The micrometer rod of the electronic digital micrometer 72 drives the piston rod 73 to move slightly on the oil storage tank 71, so that the hydraulic oil in the oil storage tank 71 is exchanged with the hydraulic oil between the hydraulic pipe 74, thereby slightly adjusting the position of the pressing block 77 in the pressing frame 63, and fine-tuning the extrusion distance between the pressing block 77 and the limit plate 82, thereby achieving the effect of fine-tuning the downward pressing distance of the pressing frame 63.

[0029] like Figure 2 , Figure 3 , Figure 4 and Figure 8As shown, the limiting member 8 includes: a guide rod 81, which is symmetrically fixed to the top of the frame on both sides of the limiting frame 5 along the conveying direction of the battery negative electrode material plate 100; a limiting plate 82, which is two in number and is slidably installed on the guide rod 81 on the corresponding side, and the limiting plate 82 is a C-shaped plate and is symmetrically distributed on both sides of the pressing frame 63. A spring 83 is arranged between the limiting plate 82 and the pressing frame 63. The spring 83 is located at the top of the pressing frame 63 and supported on the limiting plate 82 on the same side. The bottom surface of the limiting plate 82 is lower than the bottom surface of the pressing frame 63. When the hydraulic cylinder 61 drives the pressing frame 63 to press down, the limiting plate 82 The plate 82 will be limited at the edge of the coating layer along the conveying direction of the battery negative electrode material plate 100 before the pressing frame 63, so that the coating layer on the battery negative electrode material plate 100 is stably limited between the two limiting plates 82; the plate body of the lower end of the limiting plate 82 is a circular arc surface, and a buffer pad is also arranged on the circular arc surface of the lower end of the limiting plate 82. The buffer pad of the limiting plate 82 is used to buffer the pressure on the battery negative electrode material plate 100. When the limiting plate 82 limits the coating layer on the battery negative electrode material plate 100, it prevents the limiting plate 82 from pressing an indentation on the battery negative electrode material plate 100 and affecting the overall quality of the plate.

[0030] like Figure 1 and Fig. 9 As shown, both sides of the pillar 2 are provided with a retractable assembly 12, which is used to retract the battery negative electrode material plate 100 for pressing, and the retractable assembly 12 includes: a mounting plate 121, fixedly connected to the side of the pillar 2 close to the support platform 2 41; a winding roller 122, rotatably mounted on the mounting plate 121, and the winding roller 122 is used to wind up the pressed battery negative electrode material plate 100; a servo motor 123, mounted on the mounting plate 121, and the output shaft of the servo motor 123 is connected to the rotating shaft of the winding roller 122; a mounting plate 2 124, fixedly connected to the side of the pillar 2 close to the pressing frame 63; an unwinding roller 125, rotatably mounted on the mounting plate 2 124, and the unwinding roller 125 is used to unwind the battery negative electrode material plate 100 to be pressed.

[0031] When the pressing and forming device is used to press the battery negative electrode material plate 100 with high toughness, the unwinding roller 125 wound with the battery negative electrode material plate 100 is placed on the mounting plate 124. The unwinding roller 125 is responsible for releasing the battery negative electrode material plate 100 to be pressed. The battery negative electrode material plate 100 is pulled out from the unwinding roller 125 and passes through the support platform 1 4 and the support platform 2 41 in turn, and then is wound onto the winding roller 122. The servo motor 123 is enabled to intermittently drive the winding roller 122 to rotate, so that the winding roller 122 winds up the battery negative electrode material plate 100 on the unwinding roller 125. As the battery negative electrode material plate 100 is continuously released, it will first pass through the support platform 1 4 and enter the limit frame 5 along a preset path. Through openings are provided on both sides of the limit frame 5. The battery negative electrode material plate 100 is allowed to enter smoothly, and at the same time, the lateral movement of the battery negative electrode material plate 100 is limited by the internal structure of the limit frame 5 to ensure the stability and accuracy of the material during the pressing process. When the coating layer on the battery negative electrode material plate 100 is aligned and limited to the position inside the limit frame 5, the servo motor 123 is first turned off to stop the battery negative electrode material plate 100, and the hydraulic cylinder 61 located on the top frame 3 is started. The telescopic rod of the hydraulic cylinder 61 will drive the lifting platform 62 and the pressing frame 63 to move downward. During this process, the limit plate 82 will contact the battery negative electrode material plate 100 before the pressing frame 63, and be limited to the edge of the coating layer along the conveying direction of the battery negative electrode material plate 100, which plays a role in preliminarily fixing the position of the battery negative electrode material plate 100. The limiting plate 82 cooperates with the limiting frame 5 to limit the four sides of the coating layer of the battery negative electrode material plate 100. As the pressing frame 63 continues to descend, the spring 83 on the limiting plate 82 is stretched and provides a consistent pressing effect on the coating layer on the battery negative electrode material plate 100, so that the coating layer limited by the limiting frame 5 and the limiting plate 82 is pressed and compacted on the battery negative electrode material plate 100, avoiding the problem of the coating layer on the battery negative electrode material plate 100 expanding outward. When the pressing frame 63 needs to press the battery negative electrode material plate 100 with coating layers of different thicknesses, first open the oil valve 76 on the oil pipe 75, and adjust the electronic digital micrometer 72 according to the pressing thickness of the current coating layer. Specifically, the user turns the adjustment on the electronic digital micrometer 72 to adjust the pressure. By turning the knob, the micrometer rod on the electronic digital micrometer 72 slightly drives the piston rod 73 to rise and fall on the oil tank 71, so that the hydraulic oil in the oil tank 71 can be exchanged through the hydraulic oil between the oil pipe 75 and the hydraulic pipe 74, thereby changing the hydraulic oil content in the hydraulic pipe 74. After closing the oil valve 76 on the oil pipe 75, the force of the hydraulic oil in the hydraulic pipe 74 on the pressing block 77 and the connecting rod 78 will change, so that the position of the pressing block 77 inside the pressing frame 63 is fine-tuned, resulting in a change in the stroke between the pressing block 77 and the bottom of the limit plate 82, thereby achieving precise control of the pressing depth of the pressing frame 63, so that the pressing frame 63 can adapt to the pressing requirements of coating layers of different thicknesses on the battery negative electrode material plate 100.

[0032] Embodiment 2: Based on embodiment 1, Figure 5 and Figure 6 As shown, a interlayer is provided in the frame body of the pressing frame 63 near the bottom pressing surface, a heat conducting plate 91 is provided in the interlayer of the pressing frame 63, mounting blocks 92 are installed at the openings on both sides of the interlayer of the pressing frame 63, electric heating tubes 93 are bent and laid between the mounting blocks 92 on both sides, and the electric heating tubes 93 are evenly distributed on the heat conducting plate 91. When the pressing frame 63 presses the coating layer on the battery negative electrode material plate 100, the electric heating tubes 93 are energized and the heat conducting plate 91 is heated to transfer heat to the pressing surface of the pressing frame 63, thereby increasing the pressing density of the coating layer on the battery negative electrode material plate 100, thereby improving the energy density and conductivity of the subsequently assembled battery.

[0033] like Figure 1 , Figure 7 and Fig. 9 As shown, a cooling member 10 is provided on the top frame 3, and the cooling member 10 is used to quickly cool the heated battery negative electrode material plate 100. The cooling member 10 includes: a guide block 101, which is fixedly connected to one side of the lifting platform 62 through a connecting plate, and a groove is provided inside the guide block 101; a connecting column 102, which is slidably arranged on the guide block 101 through the groove; a limiting ring 103, which is fixedly connected to the upper column of the connecting column 102, and the limiting ring 103 of the connecting column 102 is placed in the groove of the guide block 101; a refrigeration frame 104, which is installed on the connecting column At the lower end of 102, the refrigeration frame 104 is located directly above the support platform 41 and does not contact each other, and the bottom surface of the refrigeration frame 104 is flush with the bottom surface of the pressing frame 63; the semiconductor refrigeration plate 105 is arranged inside the refrigeration frame 104, and the semiconductor refrigeration plate 105 is used to cool the refrigeration frame 104. The refrigeration frame 104 descends and contacts the battery negative electrode material plate 100 after pressing and hot pressing. By controlling a certain contact time, the battery negative electrode material plate 100 can be quickly cooled to room temperature, thereby improving the overall production efficiency of the battery negative electrode material plate 100.

[0034] like Figure 8As shown, the lower part of the frame of the limit plate 82 is provided with a groove, and a push rod 111 is fixed in the groove of the limit plate 82. A second spring 112 is provided on the periphery of the push rod 111. The second spring 112 is longer than the push rod 111. A pressure sensor 113 is provided on the top of the second spring 112. The sensing contact of the pressure sensor 113 is at its top. The second spring 112 is only used to support the pressure sensor 113. The pressure sensor 113 extends above the groove of the limit plate 82 and is located on the lower surfaces of both ends of the pressure block 77. The pressure sensor 113 is used to sense the pressure of the pressure block 77. The pressure sensor 113 is electrically connected to the hydraulic cylinder 61 through the built-in controller to press the pressure of the limit plate 82. When the pressing block 77 is pressed down to the limit plate 82, the pressure sensor 113 is pressed synchronously, so that the pressure sensor 113 monitors the pressure of the pressing block 77. Once the pressure of the pressing block 77 exceeds the preset value of the pressure sensor 113, the pressure sensor 113 will control the hydraulic cylinder 61 to close through the built-in controller to stop the pressing mechanism 6, so as to avoid excessive pressure on the pressing frame 63 and the pressing block 77 and damage the battery negative electrode material plate 100.

[0035] When the hydraulic cylinder 61 drives the pressing frame 63 downward through the lifting platform 62 to press the battery negative electrode material plate 100 on the support platform 4, the electric heating tube 93 is energized to transfer heat from the heat conductive plate 91 to the pressing surface at the bottom of the pressing frame 63, so that the pressing frame 63 is heated during the pressing process of the battery negative electrode, thereby increasing the pressing density of the coating layer, which helps to improve the energy density and conductivity of the battery when the subsequent battery negative electrode material plate 100 is assembled into a battery. When a group of coating layers on the battery negative electrode material plate 100 is pressed, the hydraulic cylinder 61 drives the pressing frame 63 to lift up, and the battery negative electrode material plate 100 continues to be transported forward. When the hot-pressed coating layer on the battery negative electrode material plate moves to the support platform 2 41 and aligned with the refrigeration frame 104, the upper and lower coating layers of the battery negative electrode material plate 100 will also be aligned with the pressing frame 63, and then the hydraulic cylinder 61 will be started again for a round of pressing. The lifting platform 62 that descends this time will also drive the refrigeration frame 104 to descend synchronously. After the semiconductor refrigeration plate 105 is pre-energized for cooling, the cooled refrigeration frame 104 is made to contact the battery negative electrode material plate 100 that has been hot-pressed. Since the connecting column 102 and the limiting ring 103 are placed on the guide block 101, the refrigeration frame 104 that moves downward at this time will be lifted up after contacting the battery negative electrode material plate 100, so that the refrigeration frame 104 and the connecting column 102 are only attached to the surface of the battery negative electrode material plate 100 under the action of gravity, and then the refrigeration is controlled. The time that the frame 104 contacts with the battery negative electrode material plate 100 can effectively cool the battery negative electrode material plate 100 quickly to a state close to room temperature, thereby speeding up the production process and maintaining the physical properties and chemical stability of the battery negative electrode material plate 100. When the pressing frame 63 completes the pressing of the next group of battery negative electrode material plates 100 and is lifted again, the guide block 101 is lifted along with the lifting platform 62. The guide block 101 drives the connecting column 102 and the refrigeration frame 104 to be lifted through the limiting ring 103 and separated from the cooled battery negative electrode material plate 100. Finally, the battery negative electrode material plate 100 that has completed hot pressing and cooling will be wound onto the winding roller 122. During the entire process of the pressing frame 63 pressing the battery negative electrode material plate 100, the battery negative electrode material plate 100 that is located in the limiting ring 103 is wound onto the winding roller 122. The pressure sensor 113 inside the limit plate 82 will play an important role. When the pressure sensor 113 of the limit plate 82 is squeezed by the pressure block 77, the pressure sensor 113 will compress the spring 112 and then contact the push rod 111. At this time, the pressure sensor 113 is supported by the push rod 111 and monitors the pressure applied by the pressure block 77 to the battery negative electrode material plate 100 in real time through the sensing contact on the top of the pressure sensor 113. Once it is detected that the pressure exceeds the preset safety threshold, the pressure sensor 113 will immediately send a signal to the controller, and the controller will then issue a control command to stop the hydraulic cylinder 61 from moving, so as to avoid damage to the battery negative electrode material plate 100 due to excessive compression, thereby improving the yield rate of the battery negative electrode material plate 100 during compression molding.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery negative electrode pressing and forming device, comprising a base (1), a support (2) and a top frame (3), wherein the support (2) is provided with a plurality of pillars and fixedly arranged at the circumferential edge of the top surface of the base (1), and the top frame (3) is fixedly connected between the tops of the plurality of pillars (2); wherein the top frame (3) is fixedly connected between the tops of the plurality of pillars (2); include: A support platform (4) is fixedly mounted on the top surface of the base (1); The second support platform (41) is fixedly mounted on the top surface of the base (1), and the support platform (4) and the second support platform (41) are spaced at the same height from each other; A limit frame (5) is fixedly connected to the table surface of the support table 1 (4), and the lower part of the frame body on both sides of the limit frame (5) along the conveying direction of the battery negative electrode material plate (100) is a through opening; A pressing mechanism (6) is arranged on the top frame (3) at a position corresponding to the support platform 1 (4), and the pressing mechanism (6) is used to press and compact the coating layer of the negative electrode material plate (100) for conveying the battery on the support platform 1 (4); The pressing mechanism (6) comprises: A hydraulic cylinder (61) is mounted on the top frame (3); A lifting platform (62) is mounted on the telescopic rod of the hydraulic cylinder (61); A pressing frame (63) is fixedly arranged at the bottom of the lifting platform (62). The pressing frame (63) is located directly above the supporting platform (4) and does not contact each other. The pressing frame (63) is a hollow frame and is located inside the limiting frame (5); Limiting members (8) are arranged at the frame bodies on both sides of the limiting frame (5) along the conveying direction of the battery negative electrode material plate (100), and the limiting members (8) are used to limit the coating layer on the battery negative electrode material plate (100); The pressing frame (63) is provided with an adjustment component (7), which is arranged on the pressing frame (63) and is used for finely adjusting the downward pressing distance of the pressing frame (63).

2. A battery negative electrode pressing and molding device according to claim 1, characterized in that: The limiting member (8) comprises: Guide rods (81) are symmetrically fixed to the tops of the frames on both sides of the limiting frame (5) along the conveying direction of the battery negative electrode material plate (100); There are two limit plates (82) and they are slidably mounted on the guide rods (81) on the corresponding sides. The limit plates (82) are symmetrically distributed on both sides of the pressing frame (63). A spring (83) is arranged between the limit plates (82) and the pressing frame (63). The bottom surface of the limit plates (82) is lower than the bottom surface of the pressing frame (63).

3. A battery negative electrode pressing and molding device according to claim 2, characterized in that: The plate bodies at the lower end of the limiting plate (82) are all arc surfaces, and a buffer pad is also provided on the arc surface at the lower end of the limiting plate (82).

4. A battery negative electrode pressing and molding device according to claim 3, characterized in that: The regulating component (7) comprises: An oil storage tank (71) is installed on the top of the pressing frame (63), and the oil storage tank (71) is filled with hydraulic oil; An electronic digital micrometer (72) is arranged on the top of the pressing frame (63) through a support plate, and the electronic digital micrometer (72) is located directly above the oil storage tank (71); A piston rod (73) is sealingly and slidably disposed on the oil storage tank (71), and a micrometer rod of the electronic digital micrometer (72) is connected to the piston rod (73); Two hydraulic pipes (74) are provided and are arranged on the top of the pressing frame (63); An oil delivery pipe (75) is respectively connected between the oil storage tank (71) and the hydraulic pipes (74) at two locations; An oil valve (76), each of the oil delivery pipes (75) is provided with an oil valve (76); A pressing block (77) is slidably disposed in an inner interlayer of the pressing frame (63); the pressing block (77) is H-shaped and its two ends are located inside the frame of the limiting plate (82) at two locations; Two connecting rods (78) are provided and fixedly connected to the top surface of the pressing block (77). The two connecting rods (78) on the pressing block (77) respectively penetrate the top surface of the pressing frame (63) and are slidably connected to the hydraulic pipe (74) on the same side. The space between the connecting rods (78) and the hydraulic pipe (74) is sealed and filled with hydraulic oil.

5. A battery negative electrode pressing and molding device according to claim 4, characterized in that: An interlayer is provided in the frame body of the pressing frame (63) near the bottom pressing surface, a heat conducting plate (91) is provided in the interlayer of the pressing frame (63), mounting blocks (92) are installed at openings on both sides of the interlayer of the pressing frame (63), electric heating pipes (93) are bent and laid between the mounting blocks (92) on both sides, and the electric heating pipes (93) are evenly distributed on the heat conducting plate (91).

6. A battery negative electrode pressing and molding device according to claim 5, characterized in that: The top frame (3) is provided with a cooling element (10), and the cooling element (10) comprises: A guide block (101) is fixedly connected to one side of the lifting platform (62) via a connecting plate, and a slot is provided inside the guide block (101); A connecting column (102) is slidably disposed on the guide block (101) through the slot; A limiting ring (103) is fixedly connected to the upper column of the connecting column (102), and the limiting ring (103) of the connecting column (102) is placed in the groove of the guide block (101); A refrigeration frame (104) is installed at the lower end of the connecting column (102), the refrigeration frame (104) is located directly above the second support platform (41) and does not contact each other, and the bottom surfaces of the refrigeration frame (104) and the pressing frame (63) are flush; A semiconductor refrigeration plate (105) is arranged inside the refrigeration frame (104), and the semiconductor refrigeration plate (105) is used to cool the refrigeration frame (104).

7. A battery negative electrode pressing and molding device according to claim 6, characterized in that: The lower part of the frame body of the limit plate (82) is provided with a groove, a push rod (111) is fixed in the groove of the limit plate (82), a second spring (112) is provided on the periphery of the push rod (111), the second spring (112) is longer than the push rod (111), a pressure sensor (113) is provided on the top of the second spring (112), the pressure sensor (113) extends above the groove of the limit plate (82) and is located at the lower surfaces of both ends of the pressure block (77), the pressure sensor (113) is used to sense the pressure of the pressure block (77) pressing down on the limit plate (82), and the pressure sensor (113) is electrically connected to the hydraulic cylinder (61) through a built-in controller.

8. A battery negative electrode pressing and molding device according to claim 7, characterized in that: The support (2) is provided with a retractable assembly (12) on both sides, and the retractable assembly (12) is used to retract the battery negative electrode material plate (100) for pressing, and the retractable assembly (12) comprises: A mounting plate (121) fixedly connected to a side of the support (2) close to the cooling element (10); A winding roller (122) is rotatably mounted on the first mounting plate (121); A servo motor (123) is mounted on the first mounting plate (121), and an output shaft of the servo motor (123) is connected to a rotating shaft of the winding roller (122); A second mounting plate (124) is fixedly connected to a side of the support (2) close to the pressing frame (63); The unwinding roller (125) is rotatably mounted on the second mounting plate (124).

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