Press roll and battery processing apparatus

Abstract

The utility model provides a kind of compression roller and battery processing equipment, the compression roller has two end sides opposite in axial direction, the compression roller is equipped with multiple heat exchange channels, each heat exchange channel is along the axial direction of the compression roller and penetrates the compression roller, to have respectively arranged on two end sides on the inlet and outlet, multiple heat exchange channels are arranged along the circumferential direction of the compression roller. The design of each heat exchange channel axial penetration and the combination of the circumferential distribution of multiple heat exchange channels realizes the efficient and uniform regulation of the overall temperature field of the compression roller, and improves the applicability and stability of the compression roller.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to pressure rollers and battery processing equipment. Background Technology

[0002] In modern industrial manufacturing, pressure rollers, as key functional components, are widely used in battery processing, plastic film molding, metal foil processing, paper printing, and composite material manufacturing. Their main functions include material lamination, surface smoothing, thickness uniformity, pressure transmission, and auxiliary heat transfer. Particularly in battery manufacturing, pressure rollers play a crucial role in achieving electrode-separator bonding. Different processes place diverse demands on the temperature control of pressure rollers. For example, hot-pressing requires suitable temperatures to ensure the bonding quality between materials. Excessive temperature can cause the adhesive layer (such as PVDF) on the separator surface to soften and adhere to the pressure roller surface, resulting in poor bonding, wrinkles, and powder shedding. Conversely, insufficient temperature will lead to insufficient adhesion, affecting the quality of the final product. Furthermore, frictional heat generated during prolonged operation, if not effectively controlled, can lead to decreased equipment performance, increased maintenance costs, and downtime. Therefore, precise temperature control of the pressure rollers is essential.

[0003] The common solution currently is to set up heat exchange channels inside the pressure roller to regulate the temperature, with a spiral flow channel being a typical design. Although the spiral flow channel can ensure a relatively uniform temperature distribution around the circumference of the pressure roller to some extent, this design has obvious drawbacks: First, the long flow path leads to a large temperature difference between the heat exchange medium and the outlet, making it difficult to achieve temperature consistency between upstream and downstream; second, the long flow channel increases the flow resistance of the medium, reduces heat exchange efficiency, and easily forms local hot or cold spots, further affecting the uniformity and stability of the temperature, resulting in poor process adaptability and insufficient long-term operational stability of the pressure roller. Utility Model Content

[0004] The present invention provides a pressure roller and a battery processing equipment, which realizes efficient and uniform control of the overall temperature field of the pressure roller, improves the applicability and stability of the pressure roller, and at least partially solves the above-mentioned technical problems.

[0005] In a first aspect, an embodiment of the present invention provides a pressure roller having two axially opposite end sides, and the pressure roller is provided with a plurality of heat exchange channels, each heat exchange channel penetrating the pressure roller along the axial direction of the pressure roller, having an inlet and an outlet respectively disposed on the two end sides, and the plurality of heat exchange channels being arranged circumferentially along the pressure roller.

[0006] In one embodiment, the plurality of inlets are located on one end side, and the plurality of outlets are located on the other end side.

[0007] In one embodiment, the cross-sectional area of ​​at least one of the heat exchange channels gradually increases in the direction from the inlet toward the outlet.

[0008] In one embodiment, a portion of the inlet and a portion of the outlet are located on one end side, and a portion of the inlet and a portion of the outlet are located on the other end side.

[0009] In one embodiment, on the same end side, along the circumference of the pressure roller, an outlet is provided between two adjacent inlets, and an inlet is provided between two adjacent outlets.

[0010] In one embodiment, the heat exchange channel includes an inlet section, an intermediate section, and an outlet section connected in sequence from the inlet to the outlet, wherein the cross-sectional area of ​​the intermediate section is larger than the cross-sectional areas of the inlet section and the outlet section, respectively.

[0011] Secondly, embodiments of this utility model provide a battery processing apparatus, including the pressure roller described in any of the above-mentioned items.

[0012] In one embodiment, the battery processing equipment further includes a temperature detection device for detecting the temperature of the outer peripheral surface of the pressure roller.

[0013] In one embodiment, the battery processing equipment further includes:

[0014] The first heat exchange system is connected to a portion of the heat exchange channels to provide a heating medium;

[0015] The second heat exchange system is connected to a portion of the heat exchange channels to provide a cooling medium.

[0016] In one embodiment, the battery processing equipment further includes an auxiliary heat exchange device, which is capable of non-contact heat exchange with the pressure roller.

[0017] In one embodiment, the auxiliary heat exchange device includes an infrared heating device for heating the pressure roller; and / or,

[0018] The auxiliary heat exchange device includes a heat exchange fan, which is used to supply cold air or hot air to the pressure roller.

[0019] The beneficial effects of the embodiments of this utility model are as follows:

[0020] In the pressure roller of this invention, each heat exchange channel penetrates the pressure roller along its axial direction, allowing the heat exchange medium to flow directly through the interior of the pressure roller along its axial direction. This short flow path reduces energy loss during the flow process, improving heat exchange efficiency and effectively solving problems in existing technologies such as large upstream-downstream temperature differences, high flow resistance, and localized hot or cold spots caused by excessively long flow channels. Simultaneously, the circumferential distribution of multiple heat exchange channels ensures a more uniform temperature distribution around the pressure roller. In summary, the combination of axial penetration of each heat exchange channel and circumferential distribution of multiple heat exchange channels achieves efficient and uniform control of the overall temperature field of the pressure roller, enhancing its applicability and stability. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic axial cross-sectional view of a pressure roller provided in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the end side of another pressure roller provided in an embodiment of this utility model;

[0024] Figure 3 yes Figure 2 A schematic diagram of the axial cross-section of the pressure roller in the middle;

[0025] Figure 4 This is a schematic diagram of the end side of another pressure roller provided in an embodiment of this utility model;

[0026] Figure 5 yes Figure 4 A schematic diagram of the axial cross-section of the pressure roller.

[0027] Figure label:

[0028] 100. Pressure roller; 1. End side; 2. Heat exchange channel; 201. Inlet; 202. Outlet; 21. Inlet section; 22. Intermediate section; 23. Outlet section. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0030] Please see Figure 1 In some embodiments of this application, the pressure roller 100 has two axially opposite end sides 1, and the pressure roller 100 is provided with a plurality of heat exchange channels 2. Each heat exchange channel 2 passes through the pressure roller 100 along the axial direction of the pressure roller 100 and has an inlet 201 and an outlet 202 respectively provided on the two end sides 1. The plurality of heat exchange channels 2 are arranged circumferentially along the pressure roller 100.

[0031] In the technical solution of this application, each heat exchange channel 2 penetrates the pressure roller 100 along its axial direction, allowing the heat exchange medium to flow directly through the interior of the pressure roller 100 along its axial direction. This results in a short flow path, reducing energy loss during the flow process and improving heat exchange efficiency. This effectively solves problems in existing technologies such as large upstream and downstream temperature differences, high flow resistance, and localized hot or cold spots caused by excessively long flow channels. Simultaneously, the multiple heat exchange channels 2 are distributed circumferentially, ensuring a more uniform temperature distribution in the circumferential direction of the pressure roller 100. In summary, the combination of axial penetration of each heat exchange channel 2 and circumferential distribution of multiple heat exchange channels 2 achieves efficient and uniform control of the overall temperature field of the pressure roller 100, improving its applicability and stability.

[0032] Please see Figure 2 In some embodiments, multiple inlets 201 are located on one end side 1, and multiple outlets 202 are located on the other end side 1. In these embodiments, the multiple inlets 201 on one end side 1 and the multiple outlets 202 on the other end side 1 ensure that the heat exchange medium in all heat exchange channels 2 flows in the same direction along the axial direction of the pressure roller 100, i.e., entering the pressure roller 100 from the same end side 1 and exiting from the other end side 1. This single flow direction design not only simplifies the piping connection of the external heat exchange system but also makes the delivery path of the heating or cooling medium clearer and more orderly, thereby improving the overall integration and layout rationality of the equipment.

[0033] Please see Figure 3 In some embodiments, the cross-sectional area of ​​at least one heat exchange channel 2 gradually increases from the inlet 201 towards the outlet 202. In these embodiments, based on the aforementioned plurality of inlets 201 and outlets 202 being located at opposite ends, gradually increasing the cross-sectional area of ​​the heat exchange channel 2 along the flow direction can effectively increase the heat exchange contact area in the downstream region, thereby improving cooling or heating capacity. Especially in long axial paths, as the temperature of the heat exchange medium changes along the path (e.g., the cooling medium heats up, the heating medium cools down), its heat exchange efficiency gradually decreases. At this time, by increasing the flow channel cross-sectional area in the downstream region, the attenuation of heat exchange efficiency can be structurally compensated, thereby further reducing the temperature difference between the upstream and downstream (i.e., reducing the axial temperature difference of the pressure roller 100) and improving the uniformity and response speed of the overall temperature field of the pressure roller 100.

[0034] Please see Figure 4 In some embodiments, a portion of the inlet 201 and a portion of the outlet 202 are located on one end side 1, while the remaining portions of the inlet 201 and outlet 202 are located on the other end side 1. This design allows the heat exchange medium to flow in different directions along the heat exchange channel 2 inside the pressure roller 100. In some heat exchange channels 2, the heat exchange medium flows in axially onto one end side 1 and out onto the other end side 1, while in other heat exchange channels 2, the heat exchange medium flows in the opposite direction, thus achieving a heat exchange path with both forward and reverse flow in the overall structure. This flow channel layout not only helps improve the uniformity of heat distribution inside the pressure roller 100 but also creates a temperature complementary effect between different regions, effectively mitigating the axial temperature gradient difference problem caused by unidirectional flow. Compared to a single flow direction arrangement, this design is better suited to the temperature control requirements under complex working conditions, and significantly improves the thermal stability and process adaptability of the pressure roller 100 during continuous operation.

[0035] Please see Figure 4 In some embodiments, on the same end side 1, along the circumference of the pressure roller 100, an outlet 202 is provided between two adjacent inlets 201, and an inlet 201 is provided between two adjacent outlets 202. In these embodiments, on the same end side 1, along the circumference of the pressure roller 100, an outlet 202 is provided between two adjacent inlets 201, and an inlet 201 is provided between two adjacent outlets 202. This arrangement achieves an alternating arrangement of inlets 201 and outlets 202 on the same end side 1, resulting in adjacent flow channels having opposite flow directions. It also creates a temperature complementary effect between adjacent regions, further mitigating the axial temperature gradient difference problem caused by unidirectional flow, and improving the thermal stability and process adaptability of the pressure roller 100 during continuous operation.

[0036] Please see Figure 5 In some embodiments, the heat exchange channel 2, from the inlet 201 towards the outlet 202, includes an inlet section 21, an intermediate section 22, and an outlet section 23 connected in sequence. The cross-sectional area of ​​the intermediate section 22 is larger than that of the inlet section 21 and the outlet section 23, respectively. In these embodiments, based on the aforementioned design where part of the inlet 201 and the outlet 202 are located on the same end side 1, both the inlet section 21 and the outlet section 23 can effectively exchange heat with the upstream heat exchange medium in part of the flow channel, achieving a better heat exchange effect. By increasing the cross-sectional area of ​​the intermediate section 22 of the flow channel, the heat exchange contact area in this region is significantly increased, thereby compensating for the decrease in heat exchange efficiency caused by changes in medium temperature in the intermediate region. This structural design can improve the heat exchange capacity of the intermediate region without changing the overall flow channel length, further reduce the axial temperature difference of the pressure roller 100, thereby optimizing the overall temperature distribution uniformity of the pressure roller 100 and improving its applicability and stability in high-precision continuous production processes.

[0037] Please see Figure 1 In some embodiments, the diameter of heat exchange channel 2 (see...) Figure 1 The intermediate dimension A) is between 1 and 17 mm. In these embodiments, the diameter of the heat exchange channel 2 is between 1 and 17 mm. This size range is designed to fully consider the balance between heat exchange performance and structural strength. Specifically, the larger the diameter of the heat exchange channel 2, the larger the heat exchange area per unit length, which helps to improve the overall heat exchange efficiency; however, an excessively large channel diameter will reduce the material distribution inside the pressure roller 100, thereby weakening its mechanical strength and load-bearing capacity, especially under high pressure or high speed operating conditions, which may lead to structural deformation or even fatigue failure. Conversely, if the diameter of the heat exchange channel 2 is too small, although it is beneficial to maintain the overall structural integrity of the pressure roller 100, it will significantly increase the flow resistance of the heat exchange medium, reduce the flow velocity, affect the heat exchange efficiency, and also increase the processing difficulty, which is not conducive to mass production. By controlling the diameter of the heat exchange channel 2 within the range of 1 to 17 mm, sufficient heat exchange contact area can be ensured to meet the requirements of high-precision temperature control, while maintaining the mechanical properties of the pressure roller 100 in terms of structure, avoiding the problem of strength reduction caused by excessive opening. In addition, this size range is more compatible with conventional precision machining processes (such as deep hole drilling and casting), which helps to improve manufacturing efficiency and product consistency. It is particularly suitable for industrial scenarios such as battery manufacturing and thin film composite, which have high requirements for temperature uniformity and equipment stability.

[0038] Please see Figure 1 In some embodiments, the minimum distance between the inner wall of the heat exchange channel 2 and the outer peripheral surface of the pressure roller 100 (see...) Figure 1In these embodiments, the minimum distance between the inner wall of the heat exchange channel 2 and the outer peripheral surface of the pressure roller 100 is between 1 and 10 mm. This distance directly affects the response speed and uniformity of the surface temperature distribution of the pressure roller 100. When the heat exchange channel 2 is too far from the outer peripheral surface (i.e., the distance is greater than 10 mm), there is significant thermal resistance during the transfer of heat from the heat exchange medium to the surface of the pressure roller 100, resulting in a sluggish temperature response and uneven surface temperature distribution, affecting process stability. Conversely, when the distance is too small (i.e., less than 1 mm), although it helps improve heat transfer efficiency, it significantly weakens the structural strength of the outer peripheral surface of the pressure roller 100, increasing the risk of damage due to pressure deformation and fatigue cracking. By controlling the minimum distance between the heat exchange channel 2 and the outer peripheral surface of the pressure roller 100 within the range of 1 to 10 mm, good heat transfer efficiency can be ensured while also considering the mechanical strength and service life of the pressure roller 100. This design not only improves the response speed and control accuracy of the pressure roller 100 to temperature changes, but also effectively avoids process defects caused by local overheating or uneven cooling. It is particularly suitable for continuous production scenarios such as battery manufacturing and thin film lamination, which have high requirements for temperature control accuracy and equipment reliability.

[0039] In some embodiments, a plurality of heat exchange channels 2 are uniformly arranged along the circumference of the pressure roller 100. This arrangement ensures the symmetry and consistency of the heat exchange medium distribution within the pressure roller 100, thereby structurally achieving uniform temperature field along the circumferential direction. The uniformly arranged heat exchange channels 2 effectively avoid localized overheating or insufficient cooling caused by uneven flow channel distribution, further improving the uniformity and stability of the surface temperature of the pressure roller 100.

[0040] In some embodiments, the ratio between the minimum spacing between two adjacent heat exchange channels 2 and the diameter of the heat exchange channel 2 is between 0.5 and 5. In these embodiments, when this ratio is too small (i.e., less than 0.5), it means that the heat exchange channels 2 are arranged too densely. While this helps improve the heat exchange capacity per unit area, it significantly weakens the support strength of the internal material of the pressure roller 100, increasing the risk of cracking or deformation due to local stress concentration, and may also affect the feasibility of the processing technology. Conversely, when this ratio is too large (i.e., greater than 5), it indicates that the spacing between the channels is too large, which may lead to uneven heat exchange coverage, resulting in uneven circumferential temperature distribution of the pressure roller 100 and reducing overall heat exchange efficiency. By controlling this ratio between 0.5 and 5, good mechanical strength and structural stability of the pressure roller 100 can be maintained while ensuring sufficient heat exchange density, while also considering processing feasibility and temperature control accuracy.

[0041] Secondly, embodiments of this utility model provide a battery processing apparatus, including a pressure roller 100, the structure of which is as described above. Since this battery processing apparatus employs all the technical solutions of the above embodiments, it at least possesses the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated further here.

[0042] In some embodiments, the battery processing equipment further includes a temperature detection device for detecting the temperature of the outer peripheral surface of the pressure roller 100. In these embodiments, the temperature detection device is used to detect the temperature of the outer peripheral surface of the pressure roller 100. This temperature detection device can acquire temperature distribution information of the surface of the pressure roller 100 in real time and feed the detection signal back to the control system, thereby realizing dynamic adjustment of the heat exchange medium flow rate, temperature, etc. By introducing the temperature detection function, a closed-loop temperature control system can be constructed, further improving the accuracy and response speed of the temperature control of the pressure roller 100.

[0043] Understandably, this temperature detection device can use non-contact infrared thermometers, embedded thermocouples, etc., which have the characteristics of fast response speed, high measurement accuracy, and wear resistance, and can adapt to high-speed continuous operation production environments.

[0044] In some embodiments, the battery processing equipment further includes a first heat exchange system and a second heat exchange system. The first heat exchange system is connected to a portion of the heat exchange channel 2 to provide a heating medium; the second heat exchange system is connected to a portion of the heat exchange channel 2 to provide a cooling medium. In these embodiments, by setting up two functionally independent heat exchange systems, different types of heat exchange media can be selectively introduced into the corresponding heat exchange channel 2 according to process requirements, thereby achieving precise and rapid temperature adjustment of the pressure roller 100. This design breaks through the limitations of the traditional single heat exchange mode, enabling the equipment to flexibly respond to temperature control requirements under different operating conditions. For example, when heating or maintaining a high-temperature composite state is required, the first heat exchange system is activated for heating; while during frictional heating or process cooling stages, the second heat exchange system is switched to active cooling. By separating the heating and cooling functions and configuring dedicated flow channels, not only is the heat exchange efficiency improved, but also problems such as response lag and temperature fluctuations that may occur when heating and cooling media are used alternately in the same path are avoided. This further enhances the adaptability and control accuracy of the pressure roller 100 in complex processes, making it particularly suitable for key process steps in battery manufacturing that are sensitive to temperature windows, such as thermal bonding and lamination.

[0045] The heat exchange media used in the first and second heat exchange systems can be selected according to actual process requirements, including but not limited to: deionized water, ethylene glycol aqueous solution, electronic fluorinated liquid, mineral oil, silicone oil, heat transfer oil, and molten salt. These media have good thermal conductivity and chemical stability, and can operate stably within a wide temperature window from -60℃ to 150℃, meeting the temperature control requirements of various processes.

[0046] In some embodiments, the battery processing equipment further includes a control module, such as a PLC (Programmable Logic Controller) or other form of industrial control system. This control module is signal-connected to a temperature detection device to read real-time temperature data of the pressure roller 100 surface and to intelligently judge and adjust the temperature according to preset process temperature specifications. When the surface temperature of the pressure roller 100 is detected to be higher than the set value, the PLC automatically activates the cooling medium supply system (second heat exchange system) to introduce the cooling medium into the corresponding heat exchange channel 2 for rapid cooling; conversely, when the surface temperature of the pressure roller 100 is detected to be lower than the set value, the heating medium supply system (first heat exchange system) is activated to heat the pressure roller 100 to compensate for the temperature difference and maintain it within the optimal process temperature range.

[0047] To improve temperature control accuracy and response speed, some embodiments also employ a closed-loop temperature regulation mechanism based on a PID algorithm. By continuously comparing the deviation between the current temperature and the target temperature, and dynamically adjusting the flow rate and temperature of the heating or cooling medium, the surface temperature of the pressure roller 100 is kept stable within the set range, thereby effectively avoiding quality problems caused by temperature fluctuations.

[0048] In some embodiments, the battery processing equipment further includes an auxiliary heat exchange device capable of non-contact heat exchange with the pressure roller 100. In these embodiments, the auxiliary heat exchange device can dynamically adjust the surface temperature of the pressure roller 100 without altering its internal structure, thus providing supplementary heating or cooling. By introducing a non-contact auxiliary heat exchange device, not only is the flexibility and response speed of the temperature control system improved, but redundancy is also provided when the performance of the internal heat exchange channel 2 is limited or malfunctions, ensuring that the pressure roller 100 remains within a stable process temperature range, thereby improving the reliability and applicability of the equipment.

[0049] In some embodiments, the auxiliary heat exchange device includes an infrared heating device for heating the pressure roller 100. In these embodiments, the infrared heating device can serve as a supplementary heating method for the internal heat exchange channel 2 of the pressure roller 100, providing additional heat compensation when the heating capacity of the heat exchange channel 2 is insufficient, the response speed is inadequate, or a malfunction occurs. Because infrared heating has advantages such as non-contact operation, fast response, and local controllability, it can achieve rapid temperature increase and precise heating of local areas on the surface of the pressure roller 100 without interfering with the existing flow channel system. It is particularly suitable for scenarios where the heating rate or local temperature control requirements are high during the process. Furthermore, under extreme conditions (such as a sudden drop in ambient temperature), the infrared heating device can also serve as a redundancy guarantee for the main heating system, ensuring that the pressure roller 100 is always within a stable operating temperature range, thereby improving the reliability and process adaptability of the equipment.

[0050] In some embodiments, the auxiliary heat exchange device includes a heat exchange fan, which provides cold or hot air to the pressure roller 100. In these embodiments, the heat exchange fan provides cold or hot air to the pressure roller 100 to achieve non-contact cooling or heating. This heat exchange fan can quickly intervene to perform auxiliary cooling or heating operations when the heat exchange capacity of the internal heat exchange channel 2 of the pressure roller 100 is limited, the response is delayed, or blockage occurs, playing a dual role of supplementing heat exchange and emergency regulation. By adjusting the fan's air supply temperature and speed, the dynamic requirements for the surface temperature of the pressure roller 100 at different process stages can be flexibly addressed. For example, cooling capacity can be enhanced during high-speed operation or when frictional heat generation is severe, and the heating process can be accelerated during the initial preheating stage. Furthermore, the heat exchange fan also has advantages such as simple structure, convenient maintenance, and rapid response, improving the stability and fault tolerance of the overall temperature control system.

[0051] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A pressure roller, characterized in that, The pressure roller has two axially opposite ends and is provided with multiple heat exchange channels. Each heat exchange channel extends through the pressure roller along its axial direction and has an inlet and an outlet respectively located on the two ends. The multiple heat exchange channels are arranged circumferentially along the pressure roller.

2. The pressure roller according to claim 1, characterized in that, The multiple inlets are located on one end side, and the multiple outlets are located on the other end side.

3. The pressure roller according to claim 2, characterized in that, The cross-sectional area of ​​at least one of the heat exchange channels gradually increases from the inlet toward the outlet.

4. The pressure roller according to claim 1, characterized in that, Some of the inlet and some of the outlet are located on one of the ends, and some of the inlet and some of the outlet are located on the other end.

5. The pressure roller according to claim 4, characterized in that, On the same end side, along the circumference of the pressure roller, there is an outlet between two adjacent inlets and an inlet between two adjacent outlets.

6. The pressure roller according to claim 4, characterized in that, The heat exchange channel, from the inlet toward the outlet, includes an inlet section, an intermediate section, and an outlet section connected in sequence, wherein the cross-sectional area of ​​the intermediate section is larger than the cross-sectional areas of the inlet section and the outlet section, respectively.

7. A battery processing equipment, characterized in that, Includes the pressure roller as described in any one of claims 1 to 6.

8. The battery processing equipment according to claim 7, characterized in that, The battery processing equipment also includes a temperature detection device, which is used to detect the temperature of the outer circumferential surface of the pressure roller.

9. The battery processing equipment according to claim 7, characterized in that, The battery processing equipment also includes: The first heat exchange system is connected to a portion of the heat exchange channels to provide a heating medium; The second heat exchange system is connected to a portion of the heat exchange channels to provide a cooling medium.

10. The battery processing equipment according to claim 7, characterized in that, The battery processing equipment also includes an auxiliary heat exchange device, which is capable of non-contact heat exchange with the pressure roller.

11. The battery processing equipment according to claim 10, characterized in that, The auxiliary heat exchange device includes an infrared heating device for heating the pressure roller; and / or, the auxiliary heat exchange device includes a heat exchange fan for supplying cold or hot air to the pressure roller.

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