A battery pack table top constant temperature counter roller machine

Abstract

This utility model discloses a desktop constant-temperature roller press for battery packs, including a base, a lower roller seat, a lower constant-temperature hot pressing roller, an upper roller seat, a gap adjustment mechanism, an upper constant-temperature hot pressing roller, and a drive mechanism. The lower roller seat is fixed on the base, and a lower constant-temperature hot pressing roller for compacting materials and maintaining a constant temperature is mounted on the lower roller seat. An upper roller seat is mounted on the lower roller seat, and an upper constant-temperature hot pressing roller that cooperates with the lower constant-temperature hot pressing roller to compress the materials is mounted on the upper roller seat. A gap adjustment mechanism is provided on the lower roller seat for adjusting the maximum gap between the upper and lower roller seats. This utility model, through constant-temperature hot pressing, precise gap control, and an intelligent temperature feedback system, enables battery materials to be compacted in a safe and uniform environment, improving the density, mechanical stability, and energy density of the battery cells, while reducing manual adjustments and increasing production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of battery processing equipment, and in particular to the technical field of a desktop constant temperature roller mill for battery packs. Background Technology

[0002] Against the backdrop of the rapid development of the new energy industry, the application scenarios of energy storage devices such as lithium-ion batteries and sodium-ion batteries are constantly expanding, from consumer electronics devices to electric vehicles and energy storage power stations. The market is placing increasingly stringent requirements on the energy density, compactness, and structural stability of batteries. Among these, the battery cell, as the core energy storage unit of a battery, directly determines the battery's physical energy density through the density of its internal structure.

[0003] If the battery cell has residual holes or loose areas due to problems such as solvent evaporation in the raw materials or gaps in the stacking of electrode materials during the manufacturing process, it will not only lead to a larger overall battery volume and lower space utilization, but may also cause problems such as poor ion conduction pathways and decreased charge-discharge cycle stability, which will seriously restrict the performance of the battery product.

[0004] Traditional battery cell compaction processes primarily rely on room-temperature mechanical pressing equipment to apply mechanical pressure to compress battery materials (such as electrode sheets and separator composite layers) to a set thickness. However, at room temperature, the electrode materials inside the battery cell (such as active material particles and binders) have poor plasticity, and mechanical compaction alone cannot completely eliminate internal voids. On the one hand, excessive pressure may cause electrode material breakage, separator damage, and compromise the structural integrity of the battery cell, even leading to short-circuit risks. On the other hand, insufficient pressure cannot achieve the desired compaction effect, limiting the improvement of battery energy density, and the remaining gaps will exacerbate material shedding during charge-discharge cycles due to volume expansion and contraction, shortening battery life.

[0005] Existing heating and pressing equipment uses external heating plates to conduct heat, resulting in uneven heating of battery materials. Excessively high local temperatures can easily lead to binder carbonization and active material failure, while excessively low temperatures fail to achieve the desired softening effect, resulting in significant fluctuations in compaction quality. Furthermore, the existing heating and pressing equipment lacks precise adjustment and monitoring of the roller gap. Different types and specifications of battery materials (such as electrode sheets of different thicknesses and composite structures with different numbers of layers) have significantly different requirements for compaction gaps. Existing equipment relies heavily on manual experience to adjust the roller gap, lacking a real-time, precise measurement and feedback mechanism. This easily leads to over- or under-pressure situations, resulting in poor consistency in battery cell thickness and failing to meet the precision requirements of large-scale production.

[0006] Therefore, developing a battery hot pressing device that can achieve precise constant temperature control, real-time gap monitoring, and adaptive transmission is a key requirement for solving the current pain points of battery cell compaction process, improving battery energy density and structural stability, and is of great significance for promoting the upgrading of new energy battery manufacturing technology. Summary of the Invention

[0007] The purpose of this invention is to solve the problems in the prior art by proposing a desktop constant temperature roller press for battery packs, which solves the problems of traditional battery hot pressing equipment being unable to accurately control the temperature, monitor the gap in real time, and adapt to transmission.

[0008] To achieve the above objectives, this utility model proposes a desktop constant temperature roller press for battery packs, comprising a base, a lower roller seat, a lower constant temperature hot press roller, an upper roller seat, a gap adjustment mechanism, an upper constant temperature hot press roller, and a drive mechanism. The lower roller seat is fixed on the base, and the lower roller seat is provided with a lower constant temperature hot press roller for crushing materials and maintaining a constant temperature. The upper roller seat is provided on the lower roller seat, and the upper roller seat is provided with an upper constant temperature hot press roller that cooperates with the lower constant temperature hot press roller to squeeze the materials. The lower roller seat is provided with a gap adjustment mechanism for adjusting the maximum gap between the upper roller seat and the lower roller seat.

[0009] Preferably, the upper and lower constant temperature hot press rollers are connected to a temperature control system for controlling the temperature of the upper and lower constant temperature hot press rollers. The temperature control system can keep the upper and lower constant temperature hot press rollers at a constant and precise temperature.

[0010] Preferably, the temperature control system includes a water tank, a temperature sensor, a heating element, and a water pump for conveying relatively low-temperature water from the water tank to the upper and lower constant-temperature hot press rollers. The upper and lower constant-temperature hot press rollers are respectively equipped with heating elements and temperature sensors. The water pump is connected to the water tank, the upper constant-temperature hot press roller, and the lower constant-temperature hot press roller through water pipes.

[0011] Preferably, a gap measuring mechanism is also included, wherein a gap measuring mechanism for measuring the gap between the two upper constant temperature hot press rollers and the lower constant temperature hot press roller is provided between the lower roller seat and the upper roller seat.

[0012] Preferably, the gap measuring mechanism includes a gap adjusting seat, guide rods and a gap adjusting screw. Two guide rods are vertically fixed on the lower side of the gap adjusting seat. The guide rods pass through the upper roller seat. The gap adjusting seat is provided with threaded holes. The gap adjusting screw passes through the threaded holes and presses against the upper roller seat.

[0013] Preferably, the gap measuring mechanism includes a fixed base, a micrometer, and a positioning plate. The fixed base is fixed on the upper roller seat, the micrometer is vertically fixed on the fixed base, the positioning plate is fixed on the upper roller seat, and the telescopic rod of the micrometer rests on the positioning plate.

[0014] Preferably, the upper constant temperature hot press roller and the lower constant temperature hot press roller have the same structure.

[0015] Preferably, the upper constant temperature hot press roller includes a roller, an end cap, a tube shaft, and a heating tube. The roller has sealing grooves at both ends. One end of the end cap is fixed to the tube shaft, and the other end is fixed to the sealing groove by bolts. The roller is equipped with a heating tube.

[0016] Preferably, the drive mechanism includes a drive motor, an active elastic wheel, a secondary elastic wheel, a lower passive elastic wheel, and an upper passive elastic wheel. The active elastic wheel is fixed on the rotating shaft of the drive motor. The lower roller seat and the upper roller seat are respectively provided with secondary elastic wheels that are in contact with each other. The active elastic wheel is drivenly connected to the secondary elastic wheel provided on the lower roller seat. The lower passive elastic wheel and the upper passive elastic wheel are respectively fixed on the rotating shaft of the lower constant temperature hot press roller and the upper constant temperature hot press roller. The lower passive elastic wheel and the upper passive elastic wheel are each drivenly connected to a secondary elastic wheel.

[0017] The beneficial effects of this utility model are as follows: This utility model uses constant temperature hot pressing, precise gap control and intelligent temperature feedback system to compact battery materials in a safe and uniform environment, which improves the density, mechanical stability and energy density of battery cells, while reducing manual adjustment and improving production efficiency.

[0018] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of a desktop constant temperature roller mill for battery packs according to this utility model; Figure 2 This is an assembly diagram of the gap adjustment mechanism and the gap measuring mechanism; Figure 3 This is an assembly diagram of the drive mechanism; Figure 4 This is a schematic diagram of the constant temperature hot press roller; Figure 5 This is a schematic diagram of the decomposed constant temperature hot press roller.

[0020] In the diagram: 1-base, 2-lower roller seat, 3-lower constant temperature hot press roller, 4-upper roller seat, 5-gap adjustment mechanism, 51-gap adjustment seat, 52-guide rod, 53-gap adjustment screw, 6-gap measuring mechanism, 61-fixed seat, 62-micrometer, 63-positioning plate, 7-upper constant temperature hot press roller, 71-roller, 711-sealing groove, 72-end cover, 73-tube shaft, 74-heating tube, 8-drive mechanism, 81-drive motor, 82-active elastic wheel, 83-intermediate elastic wheel, 84-lower passive elastic wheel, 85-upper passive elastic wheel. Detailed Implementation

[0021] See Figure 1This utility model discloses a desktop constant-temperature roller press for battery packs, comprising a base 1, a lower roller seat 2, a lower constant-temperature hot press roller 3, an upper roller seat 4, a gap adjustment mechanism 5, an upper constant-temperature hot press roller 7, and a drive mechanism 8. The lower roller seat 2 is fixedly mounted on the base 1. The lower roller seat 2 is equipped with the lower constant-temperature hot press roller 3 for crushing materials and maintaining a constant temperature. The upper roller seat 4 is mounted on the lower roller seat 2. The upper constant-temperature hot press roller 7, which cooperates with the lower constant-temperature hot press roller 3 to extrude materials, is mounted on the upper roller seat 4. The gap adjustment mechanism 5 is provided on the lower roller seat 2 for adjusting the maximum gap between the upper roller seat 4 and the lower roller seat 2. Battery materials pass through the lower roller seat 4... During the process between the constant temperature hot press roller 3 and the upper constant temperature hot press roller 7, the material is pressed to a set thickness, thereby compacting the pores left on the battery cell due to solvent evaporation. This ultimately reduces the battery volume and increases the battery energy density. Because the material inside the battery is more plastic at a certain temperature, the lower constant temperature hot press roller 3 and the upper constant temperature hot press roller 7 are needed to heat the battery material to improve its flexibility and plasticity without damaging the battery. However, since the battery heating temperature cannot be too high, the lower constant temperature hot press roller 3 and the upper constant temperature hot press roller 7 need to maintain the set temperature precisely.

[0022] Specifically, the upper constant temperature hot press roller 7 and the lower constant temperature hot press roller 3 are connected to a temperature control system for controlling the temperature of the upper constant temperature hot press roller 7 and the lower constant temperature hot press roller 3. The temperature control system can keep the upper constant temperature hot press roller 7 and the lower constant temperature hot press roller 3 at a constant and precise temperature, thereby ensuring that the heating effect on the material is within the set range, so that the material has good plasticity. Understandably, the temperature control system includes a water tank, a temperature sensor, a heating element 74, and a water pump for transporting relatively cool water from the water tank to the upper and lower constant-temperature hot press rollers 7 and 3. Heating elements 74 and temperature sensors are respectively installed inside the upper and lower constant-temperature hot press rollers 7 and 3. The water pump is connected to the water tank, the upper constant-temperature hot press roller 7, and the lower constant-temperature hot press roller 3 via water pipes. The heating elements 74 heat the upper and lower constant-temperature hot press rollers 7 and 3. When the temperature is high, the water pump transports cooler water from the water tank to the upper and lower constant-temperature hot press rollers 7 and 3, thereby achieving cooling. Figure 2 As shown, in order to measure the gap between the upper constant-temperature hot pressing roller 7 and the lower constant-temperature hot pressing roller 3, a gap measuring mechanism 6 needs to be added. A gap measuring mechanism 6 is installed between the lower roller seat 2 and the upper roller seat 4 to measure the gap between the two upper constant-temperature hot pressing rollers 7 and the lower constant-temperature hot pressing roller 3. For different battery materials, the minimum compressible gap is different. The maximum gap is set by the gap measuring mechanism 6 to ensure that the battery is compressed within a reasonable range. It is understandable that, as... Figure 2As shown, the gap measuring mechanism 6 includes a gap adjusting seat 51, guide rods 52, and a gap adjusting screw 53. Two guide rods 52 are vertically fixed on the lower side of the gap adjusting seat 51, passing through the upper roller seat 4. The gap adjusting seat 51 has threaded holes, and the gap adjusting screw 53 passes through the threaded holes and presses against the upper roller seat 4. By rotating the gap adjusting screw 53, it is pressed tightly against the upper roller seat 4, thereby limiting the maximum rising height of the upper roller seat 4. When the battery material passes between the two constant-temperature hot press rollers, because the maximum rising height of the upper roller seat 4 is limited by the gap adjusting screw 53, the gap between the two constant-temperature hot press rollers is also limited, allowing the battery material to be pressed to a set thickness. It should be noted that, as Figure 2 As shown, the gap measuring mechanism 6 includes a fixed base 61, a micrometer 62, and a positioning plate 63. The fixed base 61 is fixed on the upper roller seat 4, the micrometer 62 is vertically fixed on the fixed base 61, and the positioning plate 63 is fixed on the upper roller seat 4. The telescopic rod of the micrometer 62 rests on the positioning plate 63. When the upper roller seat 4 rises and falls, the gap between the positioning plate 63 and the fixed base 61 will change, and the verticality measured by the micrometer 62 will also change. The gap between the lower constant temperature hot press roller 3 and the upper constant temperature hot press roller 7 can be obtained through the micrometer 62.

[0023] It should be noted that, as Figure 4 and Figure 5 As shown, the upper constant-temperature hot press roller 7 and the lower constant-temperature hot press roller 3 have the same structure. The upper constant-temperature hot press roller 7 includes a roller 71, an end cap 72, a tube shaft 73, and a heating element 74. Sealing grooves 711 are provided at both ends of the roller 71. One end of the end cap 72 is fixed to the tube shaft 73, and the other end is fixed to the sealing groove 711 by bolts. The heating element 74 is installed inside the roller 71 to heat the inside of the roller 71. Since the roller 71 is filled with water, the temperature can be evenly distributed inside the roller 71. When the temperature is too high, hot water is added to lower the temperature inside the roller 71. When the temperature inside the roller 71 is too low, the heating element 74 raises the temperature inside the roller 71. It should be noted that, as Figure 3As shown, the drive mechanism 8 includes a drive motor 81, an active elastic wheel 82, a secondary elastic wheel 83, a lower passive elastic wheel 84, and an upper passive elastic wheel 85. The active elastic wheel 82 is fixed on the rotating shaft of the drive motor 81. The secondary elastic wheels 83 are respectively provided on the lower roller seat 2 and the upper roller seat 4, and are in contact with each other. The active elastic wheel 82 is connected to the secondary elastic wheel 83 provided on the lower roller seat 2. The lower passive elastic wheel 84 and the upper passive elastic wheel 85 are respectively fixed on the rotating shaft of the lower constant temperature hot press roller 3 and the upper constant temperature hot press roller 7. The lower passive elastic wheel 84 and the upper passive elastic wheel 85 are respectively connected to a secondary elastic wheel 83. Because the gap between the upper roller seat 4 and the lower roller seat 2 is constantly changing, the transmission wheel needs to be elastic. The active elastic wheel 82, the secondary elastic wheel 83, and the lower passive elastic wheel 84 are provided with textures to increase friction, so even if the gap changes, it does not affect the transmission.

[0024] The working process of this utility model: In the operation of this utility model's desktop constant-temperature roller press for battery packs, the operator first sets the initial gap between the upper roller seat 4 and the lower roller seat 2 using the gap adjustment mechanism 5, based on the thickness and performance requirements of the battery material. The gap is then measured using a micrometer 62 on the gap measuring mechanism 6 to ensure that the gap is controlled within the target range, thereby guaranteeing uniform thickness of the pressed battery material.

[0025] Next, the temperature control system is activated. The heating element 74 in the control system heats the interior of the upper and lower constant-temperature hot press rollers 3. When the temperature reaches the set value, the temperature sensor automatically sends a signal back to the control module to maintain the hot press rollers at a stable constant temperature. If the temperature is too high, the system automatically starts the water pump to deliver coolant from the water tank to the interior of the hot press rollers, achieving precise temperature control. Through this bidirectional regulation, a stable thermal balance can be maintained between heating and cooling, ensuring the material remains in a plastic state without thermal damage.

[0026] Once the equipment reaches operating temperature, the drive motor 81 starts, driving the upper and lower constant-temperature hot press rollers 3 and 7 to rotate synchronously via the active elastic wheel 82, the intermediate elastic wheel 83, and the upper and lower passive elastic wheels 84 and 85. The operator feeds the battery electrode sheets or cell materials to be pressed between the upper and lower rollers. Under the extrusion pressure and constant temperature of the hot press rollers, the battery material is slowly pressed to the set thickness. During this process, the roller surface temperature is evenly transferred to the interior of the material, ensuring that the micropores formed after solvent evaporation are fully compacted, resulting in a tighter bond between the active material and the separator, thereby significantly improving energy density and stability.

[0027] To prevent uneven heating of the material, the equipment can automatically adjust the roller speed according to the material's running speed to ensure a constant heating time. At the same time, the elastic structure on the surface of the upper and lower hot pressure rollers can automatically compensate for pressure when the material thickness fluctuates slightly, avoiding local overpressure or indentations.

[0028] During the pressing process, the temperature control system and the gap measuring mechanism 6 work synchronously. The system records data such as pressing temperature, pressure, and gap changes in real time for analysis of product consistency and equipment stability. Test data can be exported through an external control port to achieve data integration with the production monitoring system.

[0029] After pressing is completed, the drive motor 81 stops, and the upper roller seat 4 slowly rises under the action of the gap adjustment mechanism 5 to form a safe distance. The operator removes the pressed battery material, which can be used directly according to subsequent processes (such as electrode cutting, assembly, etc.). To prevent residual heat from affecting the next batch, the control system automatically starts the cooling cycle, so that the temperature of the hot pressing roller gradually drops to the standby temperature, saving energy and extending the equipment life.

[0030] In addition, this equipment can be equipped with a protective cover and an emergency stop device. When abnormal over-temperature, over-pressure or material jamming is detected, the system will immediately cut off the heating and drive power and automatically start the cooling water circulation to ensure operational safety.

[0031] This utility model discloses a desktop constant temperature roller press for battery packs. By setting up a constant temperature hot pressing system and a precise gap adjustment and measurement structure, it realizes constant temperature compaction of battery materials, effectively improving the density and energy density of battery cells. It has a simple structure, reliable operation, and is suitable for the production processes of various types of batteries.

[0032] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A desktop constant-temperature roller mill for battery packs, characterized in that: The device includes a base, a lower roller seat, a lower constant-temperature hot press roller, an upper roller seat, a gap adjustment mechanism, an upper constant-temperature hot press roller, and a drive mechanism. The lower roller seat is fixed on the base, and the lower roller seat is equipped with a lower constant-temperature hot press roller for crushing materials and maintaining a constant temperature. The upper roller seat is also equipped with an upper constant-temperature hot press roller that cooperates with the lower constant-temperature hot press roller to squeeze the materials. The lower roller seat is equipped with a gap adjustment mechanism for adjusting the maximum gap between the upper roller seat and the lower roller seat.

2. A battery pack table top constant temperature pair roller machine according to claim 1, characterized in that: The upper and lower constant temperature hot press rollers are connected to a temperature control system for controlling the temperature of the upper and lower constant temperature hot press rollers. The temperature control system can keep the upper and lower constant temperature hot press rollers at a constant and precise temperature.

3. A battery pack table top constant temperature pair roller machine according to claim 2, characterized in that: The temperature control system includes a water tank, a temperature sensor, a heating element, and a water pump for conveying relatively low-temperature water from the water tank to the upper and lower constant-temperature hot press rollers. The upper and lower constant-temperature hot press rollers are respectively equipped with heating elements and temperature sensors. The water pump is connected to the water tank, the upper constant-temperature hot press roller, and the lower constant-temperature hot press roller through water pipes.

4. A battery pack table top constant temperature pair roller machine according to claim 1, characterized in that: It also includes a gap measuring mechanism, wherein a gap measuring mechanism for measuring the gap between the two upper constant temperature hot press rollers and the lower constant temperature hot press roller is provided between the lower roller seat and the upper roller seat.

5. A desktop constant-temperature roller mill for battery packs as described in claim 4, characterized in that: The gap measuring mechanism includes a gap adjusting seat, guide rods and a gap adjusting screw. Two guide rods are vertically fixed on the lower side of the gap adjusting seat. The guide rods pass through the upper roller seat. The gap adjusting seat is provided with threaded holes. The gap adjusting screw passes through the threaded holes and presses against the upper roller seat.

6. The desktop constant-temperature roller mill for battery packs as described in claim 4, characterized in that: The gap measuring mechanism includes a fixed base, a micrometer, and a positioning plate. The fixed base is fixed on the upper roller seat, the micrometer is vertically fixed on the fixed base, the positioning plate is fixed on the upper roller seat, and the telescopic rod of the micrometer rests on the positioning plate.

7. A desktop constant-temperature roller mill for battery packs as described in claim 1, characterized in that: The upper constant temperature hot press roller and the lower constant temperature hot press roller have the same structure.

8. A desktop constant-temperature roller mill for battery packs as described in claim 7, characterized in that: The upper constant temperature hot press roller includes a roller, an end cap, a tube shaft, and a heating tube. The roller has sealing grooves at both ends. One end of the end cap is fixed to the tube shaft, and the other end is fixed to the sealing groove by bolts. The roller is equipped with a heating tube.

9. A desktop constant-temperature roller mill for battery packs as described in claim 7, characterized in that: The driving mechanism includes a drive motor, an active elastic wheel, a secondary elastic wheel, a lower passive elastic wheel, and an upper passive elastic wheel. The active elastic wheel is fixed on the rotating shaft of the drive motor. The lower roller seat and the upper roller seat are respectively provided with secondary elastic wheels that are in contact with each other. The active elastic wheel is drivingly connected to the secondary elastic wheel provided on the lower roller seat. The lower passive elastic wheel and the upper passive elastic wheel are respectively fixed on the rotating shaft of the lower constant temperature hot press roller and the upper constant temperature hot press roller. The lower passive elastic wheel and the upper passive elastic wheel are each drivingly connected to a secondary elastic wheel.

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