Cylinder air pressure control device

Abstract

The application discloses a kind of cylinder air pressure control devices, including gas path component and cylinder, at least one group of high-pressure gas path component and at least one group of low-pressure gas path component are provided with at least one cylinder connection controlled, the high-pressure gas path component is equipped with high-pressure solenoid valve and high-pressure electric proportional valve, the low-pressure gas path component is equipped with low-pressure solenoid valve and low-pressure electric proportional valve;So as to improve the pressure accuracy of cylinder, shorten running time, improve equipment action efficiency, overall improve product quality and processing efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cell shaping, in particular to a cylinder pressure control device in the hot pressing shaping process of bare cells. BACKGROUND

[0002] With the development of new energy vehicles, the battery as the main energy source of electric vehicles has also been further developed. Lithium ion batteries have the characteristics of high voltage, large specific energy, long cycle life, good safety performance, small self-discharge, fast charging, wide working temperature range, etc., and have broad application prospects in electric vehicles.

[0003] In the production process of lithium batteries, after the production of the pole piece is completed, the positive and negative pole pieces and the separator are assembled and manufactured into a basic cell by winding or stacking. Then, the cell is generally subjected to hot pressing shaping. The main purpose of cell hot pressing shaping is to improve the flatness of lithium ion batteries, so that the thickness of the cell meets the requirements and has high consistency; and to eliminate the wrinkles of the separator, to expel the air inside the cell, to make the separator and the positive and negative pole pieces tightly attached together, to shorten the lithium ion diffusion distance, and to reduce the battery internal resistance.

[0004] The existing shaping equipment balances the force value between each level of the press by using the cylinder to lift the pressing plate, which is prone to deviation in pressure control accuracy. Therefore, the shaped battery cell will also deviate to some extent, the battery flatness is not good, the thickness of the cell is uneven, which affects the charging and discharging function and service life, and may damage the battery separator and electrode sheet. At present, the lithium battery cell shaping process has the problems of long pressing plate moving time, low work efficiency, low shaping pressure control accuracy, affecting product quality, high scrap rate, etc. SUMMARY

[0005] In view of the above problems, the present application provides a cylinder pressure control device which can improve the pressure accuracy of the cylinder, shorten the running time, improve the action efficiency of the equipment, and overall improve the product quality and processing efficiency.

[0006] In a first aspect, the present application provides a cylinder pressure control device, comprising a gas path assembly and a cylinder, the gas path assembly being connected with at least one cylinder controlled by at least one group of high-pressure gas path assemblies and at least one group of low-pressure gas path assemblies, the high-pressure gas path assembly being provided with a high-pressure electromagnetic valve and a high-pressure electric proportional valve, and the low-pressure gas path assembly being provided with a low-pressure electromagnetic valve and a low-pressure electric proportional valve.

[0007] In the technical scheme of the embodiment of the present application, the combination of at least two electric proportional valves of a high-pressure electric proportional valve and a low-pressure electric proportional valve is arranged to control the air cylinder through the separately arranged electromagnetic valve and electric proportional valve. One high-pressure electromagnetic valve is connected with one high-pressure electric proportional valve and one low-pressure electromagnetic valve is connected with one low-pressure electric proportional valve to control the air pressure of one air cylinder, or multiple air cylinders are arranged with multiple groups of the air path structure to be controlled individually. Such a design enables the air pressure of the air cylinder to reach a predetermined value through the high-pressure electric proportional valve first, and then the low-pressure electric proportional valve is supplemented to reach the target value, so that the efficiency is significantly improved and the accuracy is greatly improved.

[0008] In some embodiments, the high-pressure air path assembly and the low-pressure air path assembly jointly control the air pressure of one air cylinder, the high-pressure air path assembly is provided with a high-pressure electromagnetic valve and a high-pressure electric proportional valve, the low-pressure air path assembly is provided with a low-pressure electromagnetic valve and a low-pressure electric proportional valve, and the fast pressure adjustment of the air cylinder is realized to accelerate the adjustment speed and accuracy.

[0009] In some embodiments, the high-pressure air path assembly and the low-pressure air path assembly jointly control the air pressure of two air cylinders, the high-pressure air path assembly is provided with a high-pressure electromagnetic valve and a high-pressure electric proportional valve, and the low-pressure air path assembly is provided with a low-pressure electromagnetic valve and a low-pressure electric proportional valve. The fast pressure adjustment is realized to accelerate the adjustment speed and accuracy.

[0010] In some embodiments, each air cylinder is provided with one group of high-pressure air path assemblies and one group of low-pressure air path assemblies for control, the high-pressure air path assembly is provided with a high-pressure electromagnetic valve and a high-pressure electric proportional valve, and the low-pressure air path assembly is provided with a low-pressure electromagnetic valve and a low-pressure electric proportional valve. The high-pressure air path assembly and the low-pressure air path assembly are arranged for each air cylinder to control, and the fast pressure adjustment of each air cylinder is realized to accelerate the adjustment speed and accuracy.

[0011] In some embodiments, specifically, the high-pressure air path assembly and the low-pressure air path assembly are respectively provided with two groups of air pressure control assemblies for two air cylinders, one group of the high-pressure air path assembly and the low-pressure air path assembly is connected with one air cylinder, and the other group of the high-pressure air path assembly and the low-pressure air path assembly controls the air pressure of the other air cylinder, the high-pressure air path assembly is provided with a high-pressure electromagnetic valve and a high-pressure electric proportional valve, and the low-pressure air path assembly is provided with a low-pressure electromagnetic valve and a low-pressure electric proportional valve. The high-pressure air path assembly and the low-pressure air path assembly are arranged for each air cylinder to control, and the fast pressure adjustment of each air cylinder is realized to accelerate the adjustment speed and accuracy.

[0012] In some embodiments, the high-pressure gas circuit assembly is provided with multiple stages of high-pressure gas circuit assemblies, and the control pressures of the high-pressure electric proportional valves of the high-pressure gas circuit assemblies of different stages are different. Thus, the established high-pressure target value can be reached faster, and the next control is accelerated, thereby improving the overall control speed and precision.

[0013] In some embodiments, the low-pressure gas circuit assembly is provided with multiple stages of low-pressure gas circuit assemblies, and the control pressures of the low-pressure electric proportional valves of the low-pressure gas circuit assemblies of different stages are different. Thus, the established low-pressure target value can be reached faster, and the next control is accelerated, thereby improving the overall control speed and precision.

[0014] In some embodiments, the high-pressure gas circuit assembly is provided with one stage of high-pressure gas circuit assembly and two stages of two-group high-pressure gas circuit assemblies, and the cylinder is controlled through the high-pressure gas circuit assembly, the low-pressure gas circuit assembly, and the low-pressure gas circuit assembly. The high-pressure gas circuit assembly is provided with a high-pressure solenoid valve and a high-pressure electric proportional valve, and the low-pressure gas circuit assembly is provided with a low-pressure solenoid valve and a low-pressure electric proportional valve. Two-stage control of high pressure is adopted, and two high-pressure values are preset. In use, the high-pressure value of the first-stage high-pressure electric proportional valve is first reached, and then the high-pressure value of the second-stage high-pressure electric proportional valve is reached, so that the established high-pressure value can be controlled more accurately. Finally, the low-pressure electric proportional valve is used to achieve accurate pressure control. The multi-stage control method avoids inaccurate control, affects the speed and precision of subsequent pressure control, and improves the adjustment efficiency and control precision of the cylinder as a whole.

[0015] In some embodiments, the low-pressure gas circuit assembly is provided with two groups of one-stage low-pressure gas circuit assemblies and two groups of two-stage low-pressure gas circuit assemblies, and the cylinder is controlled through the high-pressure gas circuit assembly, the one-stage low-pressure gas circuit assembly, and the two-stage low-pressure gas circuit assembly. The high-pressure gas circuit assembly is provided with a high-pressure solenoid valve and a high-pressure electric proportional valve, and the low-pressure gas circuit assembly is provided with a low-pressure solenoid valve and a low-pressure electric proportional valve. Two-stage control of low pressure is adopted, and two low-pressure values are preset. In use, the high-pressure value of the high-pressure electric proportional valve is first reached, and then the first low-pressure value of the one-stage low-pressure electric proportional valve is reached, and finally the second low-pressure electric proportional valve is used to achieve more accurate pressure control. The multi-stage control method avoids inaccurate control, affects the speed and precision of subsequent pressure control, and improves the adjustment efficiency and control precision of the cylinder as a whole.

[0016] In some embodiments, the high-pressure proportional valve and the low-pressure proportional valve of the gas circuit assembly are high-precision electric proportional valves. The air pressure of the cylinder can be controlled more accurately.

[0017] In some embodiments, the high-pressure electric proportional valve of the high-pressure gas circuit assembly and the cylinder are provided with an induced check valve connected with a high-pressure solenoid valve, and the low-pressure electric proportional valve of the low-pressure gas circuit assembly and the cylinder are provided with an induced check valve connected with a low-pressure solenoid valve. The self-walking phenomenon of the cylinder after stopping is prevented.

[0018] In some embodiments, the high-pressure electromagnetic valve and the low-pressure electromagnetic valve of the gas path assembly are connected with a muffler, and the gas cylinder is connected with a muffler. Thus, the noise during operation can be effectively reduced.

[0019] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clear, the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Moreover, the same reference numerals in all the drawings represent the same elements. In the drawings:

[0021] Figure 1 Structure diagram of the hot-pressing die set of some embodiments of the present application;

[0022] Figure 2 Front view of the hot-pressing die set of some embodiments of the present application;

[0023] Figure 3 Top view of the hot-pressing die set of some embodiments of the present application;

[0024] Figure 4 Schematic diagram of the gas cylinder gas pressure control of some embodiments of the present application;

[0025] Figure 5 Another schematic diagram of the gas cylinder gas pressure control of some embodiments of the present application;

[0026] Figure 6 Another schematic diagram of the gas cylinder gas pressure control of some embodiments of the present application;

[0027] Figure 7 Another schematic diagram of the gas cylinder gas pressure control of some embodiments of the present application;

[0028] Figure 8 Another schematic diagram of the gas cylinder gas pressure control of some embodiments of the present application.

[0029] The reference numerals in the detailed description are as follows:

[0030] Hot-pressing die set 1, platen 11, die 12, base plate 13;

[0031] Gas cylinder 2;

[0032] High pressure gas circuit assembly 3, high pressure solenoid valve 31, high pressure electric proportional valve 32, first stage high pressure gas circuit assembly 33, second stage high pressure gas circuit assembly 34, first stage high pressure electric proportional valve 321, second stage high pressure electric proportional valve 322;

[0033] Low pressure gas circuit assembly 4, low pressure solenoid valve 41, low pressure electric proportional valve 42, first stage low pressure gas circuit assembly 43, second stage low pressure gas circuit assembly 44, first stage low pressure electric proportional valve 421, second stage low pressure electric proportional valve 422;

[0034] Battery cell 5;

[0035] Induced check valve 6; muffler 7. DETAILED DESCRIPTION

[0036] The embodiments of the present application will be described in detail with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot be used to limit the protection scope of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising" and "having," and any variations thereof, as used in the specification and claims herein, are intended to cover not only the recited elements but also any additional elements.

[0038] In the description of the embodiments of the present application, the technical terms "high pressure", "low pressure", "first stage", "second stage", "one group", "another group", "one", "another" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0039] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0040] In the description of the embodiments of the present application, the term "and / or" is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0041] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0042] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0043] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0044] With the development of electric vehicles and other industries, the application of power batteries is more and more extensive, such as electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and is also applied to water, fire, wind and solar power stations and other energy storage power systems, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the requirements for battery technology are becoming more and more strict, and each processing procedure is closely related to the quality and service life of the battery.

[0045] The inventor notices that, in the shaping process of lithium battery cell preparation, in order to make the lithium ion battery cell flat after shaping and avoid shrinkage recovery. The cell hot pressing shaping process first places the wound or laminated cell on the mold, sets the pressure cylinder pressure and mold temperature, and then the upper and lower mold makes the cell shape under the action of certain pressure and temperature, so that the cell thickness is consistent, the cell elasticity is reduced, the cell thickness is consistent, and the product cell thickness is consistent.

[0046] The main process parameters of cell hot pressing shaping are pressure, time and mold temperature. Under suitable process parameters, there is almost no air in the thick cell, the separator and the pole piece are tightly bonded together, and the loose cell can become a hard block state. However, for the ceramic separator used in recent years, due to the existence of ceramic layer, it is difficult for the separator to bond with the pole piece to form such a state. In the process determination test, the detection items include the air permeability of the separator, the thickness change, whether the cell thickness meets the shell requirement, whether the pole piece is broken, etc.

[0047] In addition, the battery separator, as the core component of the battery, plays a key role in isolating the positive and negative electrode electron conduction, and allowing lithium ions to pass between the two poles. The microporous structure on the separator is an important channel for the ions to pass between the positive and negative electrodes. Its air permeability will directly affect the performance of the battery. The air permeability of the separator refers to the amount of gas permeated by the separator under certain time and pressure. If the air permeability of the separator is not good, it will affect the transmission of lithium ions between the positive and negative electrodes, and then affect the charge and discharge of the lithium battery. The test process is as follows: fix the battery separator, apply air pressure to one side of the separator, measure the air pressure drop and the time used, detect the air permeability of the separator, the shorter the time used, the better the air permeability. In the hot pressing process, the separator may be severely compressed, the thickness of the separator changes greatly, causing the micropores to be blocked, and the naked eye can observe that the separator becomes transparent. This situation shows that the hot pressing shaping of the cell is out of limit, which will affect the transmission of lithium ions. If the pole piece is brittle, the cell bending part is easy to fall off or even break in the hot pressing shaping, which will cause the limitation of electron transmission and increase the internal resistance of the battery. Therefore, the cell hot pressing shaping must also avoid such situation. The two aspects require that the hot pressing shaping pressure is smaller and the time is shorter. On the other hand, the hot pressing shaping must make the cell shape, the cell thickness meets the process requirements, the cell elasticity is reduced, and the thickness of the finished product cell is consistent. Therefore, the process parameters such as pressure, time and temperature need to be optimized.

[0048] The main problem in the existing equipment is the control of the cylinder running speed and pressure accuracy, which affects the processing efficiency and quality. In the prior art, the pressure of the cylinder is controlled by using one SY series solenoid valve and one electric proportional valve to control the pressure of two lifting cylinders. Due to the flow rate limitation of the electric proportional valve, the lifting speed is limited, and according to the actual use situation, the lifting time is about 2.5S. In addition, using one solenoid valve and one electric proportional valve to control the pressure of two cylinders, the pressure control accuracy is prone to deviation, and the shaped battery cell also deviates, the battery flatness is not good, the thickness of the cell is not uniform, which affects the charging and discharging function and service life, and may damage the battery separator and electrode sheet. The applicant found that a high-pressure electric proportional valve and a low-pressure electric proportional valve can be configured for the cylinder in the design to shorten the adjustment time and improve the control accuracy. Specifically, the gas path assembly and the cylinder are arranged, and the gas path assembly is connected with at least one cylinder controlled by at least one group of high-pressure gas path assembly and at least one group of low-pressure gas path assembly. The high-pressure gas path assembly is provided with a high-pressure solenoid valve and a high-pressure electric proportional valve, and the low-pressure gas path assembly is provided with a low-pressure solenoid valve and a low-pressure electric proportional valve. When controlling, the high-pressure solenoid valve of the high-pressure gas path assembly controls the high-pressure electric proportional valve to reach the required control value, and then the low-pressure solenoid valve of the low-pressure gas path assembly controls the low-pressure electric proportional valve to reach the required control value, so as to realize the purpose of quickly controlling the cylinder pressure and realize the accurate control of the cylinder stroke, and improve the operation efficiency and accuracy of the equipment.

[0049] The cylinder pressure control device disclosed in the embodiments of the present application can be used in the battery cell hot pressing shaping process device, but is not limited to this. Other devices that need to control the cylinder pressure can be used, which can improve the value of the cylinder reaching the required control pressure, improve the processing efficiency of the equipment, improve the control accuracy, improve the processing quality of the products, improve the stability of the battery performance and the battery life in the battery processing, and reduce the rate of defective products.

[0050] The embodiment of the present application provides a shaping device using a cylinder pressure control device, which is mainly used for shaping square or circular battery cells.

[0051] The following embodiments are described with reference to a cylinder pressure control device of an embodiment of the present application as an example of a square cell hot pressing module 1.

[0052] Please refer to Figures 1-3The hot-pressing mold group 1 is provided with a pressing plate 11, a mold 12 is arranged below the pressing plate 11, air cylinders 2 are arranged on both sides of the pressing plate 11 respectively, the air cylinders 2 are fixed on a bottom plate 13, the bottom plate 13 or a device rack is provided with two groups of high-pressure air path assemblies 3 and two groups of low-pressure air path assemblies 4, the high-pressure air path assembly 3 is provided with a high-pressure electromagnetic valve 31 and a high-pressure electric proportional valve 32, the low-pressure air path assembly 4 is provided with a low-pressure electromagnetic valve 41 and a low-pressure electric proportional valve 42, one air cylinder 2 is controlled by one group of high-pressure air path assemblies 3 and one group of low-pressure air path assemblies 4, and the other air cylinder 2 is controlled by the other group of high-pressure air path assemblies 3 and the other group of low-pressure air path assemblies 4. The air path enters the high-pressure electromagnetic valve 31 and the low-pressure electromagnetic valve 41 from a total gas source, and then passes through the high-pressure electric proportional valve 32 and the low-pressure electric proportional valve 42 to control the air pressure of the air cylinder 2 respectively, so that the air cylinder 2 reaches a certain value through the high-pressure electric proportional valve 32 first, and then reaches a target value by supplementing the low-pressure electric proportional valve 42. Because the low-pressure electric proportional valve 42 has a lower subdivision value, the force value has higher accuracy under the air cylinder 2 with the same cylinder diameter. The running speed and accuracy of the air cylinder 2 are reflected on the pressing plate connected to the air cylinder 2, so that the accuracy of the shaping of the battery cell 5 is realized, and the processing efficiency is improved. The working process of the square battery cell hot-pressing mold group 1 is roughly as follows: a certain force is transmitted to the pressing plate 11 through the upper part of the pressing plate 11, and then the air cylinders 2 on both sides are lifted to offset the received pressure, until the pressing plate 11 maintains the shaping pressure of the battery cell 5 at a certain force value, the force value is maintained for a set time, then the force transmission mechanism on the upper part of the pressing plate 11 is removed, finally the air cylinders 2 on both sides are reset, and the shaping action of the battery cell 5 is completed.

[0053] According to some embodiments of the present application, referring to Figures 1-8 , Figures 1-3 is a schematic view of a hot-pressing mold group, Figures 4-8 is a schematic view of each air path. The present application provides a cylinder air pressure control device, which comprises an air path assembly and an air cylinder 2, the air path assembly is connected with at least one air cylinder 2 and is provided with at least one group of high-pressure air path assemblies 3 and at least one group of low-pressure air path assemblies 4, the high-pressure air path assembly 3 is provided with a high-pressure electromagnetic valve 31 and a high-pressure electric proportional valve 32, and the low-pressure air path assembly 4 is provided with a low-pressure electromagnetic valve 41 and a low-pressure electric proportional valve 42.

[0054] The electromagnetic valve is an industrial device controlled by electromagnetism, is an automatic basic element for controlling fluid, belongs to an actuator, and is not limited to hydraulic pressure and air pressure. The electromagnetic valve is used in an industrial control system to adjust the direction, flow, speed and other parameters of a medium. The electromagnetic valve can cooperate with different circuits to achieve the expected control, and the control accuracy and flexibility can be guaranteed. In the cover device, the electromagnetic valve is used to control the on-off of the air path of the total gas source delivered to the electric proportional valve, and the electric proportional valve is used to achieve the accurate control of the air pressure of the air cylinder.

[0055] The electric proportional valve control belongs to continuous control, and has the characteristics that the output changes with the change of the input, and there is a certain proportional relationship between the output and the input. The proportional control has open loop control and closed loop control. In the device, the electric proportional valve is used for controlling the control of the gas pressure delivered to the cylinder, controlling the stroke and shaping pressure of the cylinder, and through the control of multiple electric proportional valves, the target value is reached by first passing through the high-pressure electric proportional valve to reach a certain value, and then supplementing the low-pressure electric proportional valve 42. Again, because the low-pressure electric proportional valve 42 has a lower subdivision value, under the same cylinder diameter of the cylinder, the force value accuracy is higher.

[0056] The electric proportional valve can realize stepless adjustment of pressure and speed, avoid the impact phenomenon when the on-off switch type gas valve reverses, can realize remote control and program control, compared with intermittent control, the system is simplified, and the components are greatly reduced, compared with hydraulic electric proportional valve, the volume is small, the weight is light, the structure is simple, the cost is lower, but the response speed is much slower than the hydraulic system, and it is also more sensitive to load changes, the power is small, the heat is less, the noise is low, there is no fire, and the environment is not polluted, and the influence of temperature change is small.

[0057] The gas path control mode of the cylinder is that the gas pressure adjusted by the high-pressure gas path assembly 3 reaches a certain value, and then the gas pressure value adjusted by the low-pressure gas path assembly 4 is supplemented to reach the target value, the regulation efficiency of the cylinder pressure is significantly improved, and the accuracy is also greatly improved.

[0058] According to some embodiments of the present application, referring to Figure 4 , the high-pressure gas path assembly 3 and the low-pressure gas path assembly 4 jointly control a cylinder 2, the high-pressure gas path assembly 3 is provided with a high-pressure electromagnetic valve 31 and a high-pressure electric proportional valve 32, and the low-pressure gas path assembly 4 is provided with a low-pressure electromagnetic valve 41 and a low-pressure electric proportional valve 42. First, the gas pressure adjusted by the high-pressure electromagnetic valve 31 through the high-pressure electric proportional valve 32 reaches a certain value, and then the gas pressure value adjusted by the low-pressure electromagnetic valve 41 through the low-pressure electric proportional valve 42 is supplemented to reach the target value, the regulation efficiency of the cylinder pressure is significantly improved, and the accuracy is also greatly improved.

[0059] According to some embodiments of the present application, referring to Figure 5 , the high-pressure gas path assembly 3 and the low-pressure gas path assembly 4 jointly control two cylinders 2, the high-pressure gas path assembly 3 is provided with a high-pressure electromagnetic valve 31 and a high-pressure electric proportional valve 32, and the low-pressure gas path assembly 4 is provided with a low-pressure electromagnetic valve 41 and a low-pressure electric proportional valve 42. The control mode is that the gas pressure of the two cylinders 2 reaches a certain value by the high-pressure electromagnetic valve 31 through the high-pressure electric proportional valve 32, and then the gas pressure value of the two cylinders 2 is supplemented to reach the target value by the low-pressure electromagnetic valve 41 through the low-pressure electric proportional valve 42, the regulation efficiency of the pressure of the two cylinders is significantly improved, and the accuracy is also greatly improved.

[0060] According to some embodiments of the present application, referring toFigure 6 , the cylinder 2 is provided with at least two, each cylinder 2 is provided with a set of high pressure gas circuit assembly 3 and a set of low pressure gas circuit assembly 4 control, high pressure gas circuit assembly 3 is provided with high pressure solenoid valve 31 and high pressure electric proportional valve 32, low pressure gas circuit assembly 4 is provided with low pressure solenoid valve 41 and low pressure electric proportional valve 42. The control mode is that the high pressure solenoid valve 31 of each group of high pressure gas circuit assembly 3 controls the air pressure of the respective cylinder 2 to reach the predetermined value through the high pressure electric proportional valve 32, and then the low pressure solenoid valve 41 of each group of low pressure gas circuit assembly 4 makes the air pressure value of the respective cylinder 2 reach the target value through the low pressure electric proportional valve 42, each cylinder 2 is controlled by the high and low pressure solenoid valve and the high and low pressure electric proportional valve, the pressure of each cylinder 2 is more accurate, the adjustment efficiency of the pressure of each cylinder 2 is significantly improved, and the accuracy is also greatly improved. In this process, the low pressure electric proportional valve 42 has a lower subdivision value, under the same cylinder diameter, the displacement precision is improved, the force value accuracy is more accurate, and the required pressure value can be reached in a shorter time, the movement time is theoretically improved to about 1.1S, which is 2.2 times faster than the time of 2.5S in the prior art, the efficiency is significantly improved, and the accuracy is also greatly improved.

[0061] According to some embodiments of the application, with reference to Figure 6 , the cylinder 2 is provided with at least two, each cylinder 2 is provided with a set of high pressure gas circuit assembly 3 and a set of low pressure gas circuit assembly 4 control, high pressure gas circuit assembly 3 is provided with high pressure solenoid valve 31 and high pressure electric proportional valve 32, low pressure gas circuit assembly 4 is provided with low pressure solenoid valve 41 and low pressure electric proportional valve 42. The control mode is that the high pressure solenoid valve 31 of each group of high pressure gas circuit assembly 3 controls the air pressure of the respective cylinder 2 to reach the predetermined value through the high pressure electric proportional valve 32, and then the low pressure solenoid valve 41 of each group of low pressure gas circuit assembly 4 makes the air pressure value of the respective cylinder 2 reach the target value through the low pressure electric proportional valve 42, each cylinder 2 is controlled by the high and low pressure solenoid valve and the high and low pressure electric proportional valve, the pressure of each cylinder 2 is more accurate, the adjustment efficiency of the pressure of each cylinder 2 is significantly improved, and the accuracy is also greatly improved. In this process, the low pressure electric proportional valve 42 has a lower subdivision value, under the same cylinder diameter, the displacement precision is improved, the force value accuracy is more accurate, and the required pressure value can be reached in a shorter time, the movement time is theoretically improved to about 1.1S, which is 2.2 times faster than the time of 2.5S in the prior art, the efficiency is significantly improved, and the accuracy is also greatly improved.

[0062] According to some embodiments of the application, the high pressure gas circuit assembly 3 is provided with a plurality of high pressure gas circuit assemblies 3, and the control pressures of the high pressure electric proportional valves of the high pressure gas circuit assemblies 3 are different. The high pressure region is divided into several regions, and the control is segmented, so that the predetermined high pressure target value can be reached faster, the next control can be entered faster, and the overall control speed and accuracy are improved.

[0063] According to some embodiments of the present application, the low-pressure gas circuit assembly 4 is provided with multiple stages of low-pressure gas circuit assemblies 4, and the control pressures of the low-pressure electric proportional valves 42 of the low-pressure gas circuit assemblies 4 are different. The low-pressure area is divided into several areas, and the control is segmented, so that the established low-pressure target value can be reached faster, the control of the next step is accelerated, and the overall control speed and accuracy are improved.

[0064] According to some embodiments of the present application, referring to Figure 7 , the high-pressure gas circuit assembly 3 is provided with a first-stage high-pressure gas circuit assembly 33 and a second-stage high-pressure gas circuit assembly 34, and the cylinder is controlled through the first-stage high-pressure gas circuit assembly 33, the second-stage high-pressure gas circuit assembly 34, and the low-pressure gas circuit assembly 4. The first-stage high-pressure gas circuit assembly 33 is provided with a high-pressure electromagnetic valve 31 and a first-stage high-pressure electric proportional valve 321, the second-stage high-pressure gas circuit assembly 34 is provided with a high-pressure electromagnetic valve 31 and a second-stage high-pressure electric proportional valve 322, and the low-pressure gas circuit assembly 4 is provided with a low-pressure electromagnetic valve 41 and a low-pressure electric proportional valve 42. The two-stage control of high pressure is adopted, two high pressure values are preset, in use, the high pressure value of the first-stage high-pressure electric proportional valve 321 is first reached, and then the high pressure value of the second-stage high-pressure electric proportional valve 322 is reached, so that the established high pressure value that needs to be reached is more accurately controlled, and finally the accurate pressure control is achieved through the low-pressure electric proportional valve 42. The multi-stage control method avoids inaccurate control, affects the speed and accuracy of subsequent air pressure control, and the method overall improves the adjustment efficiency and control accuracy of the cylinder.

[0065] According to some embodiments of the present application, referring to Figure 8 , the low-pressure gas circuit assembly 4 is provided with a first-stage low-pressure gas circuit assembly 43 and a second-stage low-pressure gas circuit assembly 44, and the cylinder is controlled through the first-stage low-pressure gas circuit assembly 43 and the second-stage low-pressure gas circuit assembly 44. The high-pressure gas circuit assembly 3 is provided with a high-pressure electromagnetic valve 31 and a high-pressure electric proportional valve 32, the first-stage low-pressure gas circuit assembly 4 is provided with a low-pressure electromagnetic valve 41 and a first-stage low-pressure electric proportional valve 421, and the second-stage low-pressure gas circuit assembly 4 is provided with a low-pressure electromagnetic valve 41 and a second-stage low-pressure electric proportional valve 422. The two-stage control of low pressure is adopted, two low pressure values are preset, in use, the high pressure value of the high-pressure electric proportional valve 32 is first reached, then the first low pressure value is reached by the first-stage low-pressure electric proportional valve 421, and finally the accurate pressure control is achieved through the second-stage low-pressure electric proportional valve 422. The multi-stage control method avoids inaccurate control, affects the speed and accuracy of subsequent air pressure control, and the method overall improves the adjustment efficiency and control accuracy of the cylinder.

[0066] According to some embodiments of the present application, referring to Figure 8, high pressure gas path assembly 3 and cylinder 2 between the high pressure electric proportional valve 32 and the induction check valve 6 and high pressure solenoid valve 31 connected, low pressure gas path assembly 4 and cylinder 2 between the low pressure electric proportional valve 42 and the induction check valve 6 and low pressure solenoid valve 41 connected. Prevent the cylinder stop after the phenomenon of self walking.

[0067] According to some embodiments of the application, referring to Figure 8 , the high pressure solenoid valve 31 and low pressure solenoid valve 41 of the gas path assembly are connected with the silencer 7, and the cylinder 2 is connected with the silencer 7. The noise of the high pressure solenoid valve 31, the low pressure solenoid valve 41 and the cylinder 2 can be reduced when the gas is discharged, and the noise of the working environment can be reduced.

[0068] According to some embodiments of the application, referring to Figures 1 to 3 and Figure 6 , the application provides a cylinder pressure control device, which comprises a gas path assembly and a cylinder 2 (CDQ2A180-100DCMZ--D-M9BL SMC standard thin cylinder is used in this embodiment), the gas path assembly is provided with a high pressure gas path assembly 3 and a low pressure gas path assembly 4, the high pressure gas path assembly 3 and the low pressure gas path assembly 4 are respectively provided with two groups of control two cylinder gas pressure, one group of high pressure gas path assembly 3 and low pressure gas path assembly 4 is connected with one cylinder, and the other group of high pressure gas path assembly 3 and low pressure gas path assembly 4 controls the gas pressure of the other cylinder, the high pressure gas path assembly 3 is provided with a high pressure solenoid valve 31 (two five solenoid valves SY9420-5LZD-03 are used in this embodiment) and a high pressure electric proportional valve 32 (electric proportional valve ITV3050-313BL is used in this embodiment), the low pressure gas path assembly 4 is provided with a low pressure solenoid valve 41 (two five solenoid valves SY9420-5LZD-03 are used in this embodiment) and a low pressure electric proportional valve 42 (electric proportional valve ITV3050-313BL is used in this embodiment); in operation, the high pressure electric proportional valve 32 is controlled to reach the required control of the established high pressure value through the high pressure solenoid valve 31, and then the low pressure electric proportional valve 42 is controlled to reach the required control of the established low pressure value through the low pressure solenoid valve 41, so as to realize the purpose of rapid control of the cylinder 2 gas pressure, realize the precise control of the cylinder 2 stroke, and improve the operation efficiency and accuracy of the equipment. In this process, the low pressure electric proportional valve 42 has a lower subdivision value, under the same cylinder diameter, the displacement precision is improved, the force value accuracy is more accurate, and the required pressure value can be reached in a shorter time, the movement time is theoretically improved to about 1.1S, which is 2.2 times faster than the time of 2.5S in the prior art, the efficiency is improved significantly, and the accuracy is also greatly improved.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A cylinder air pressure control device, comprising an air circuit assembly and a cylinder, characterized in that, The cylinder air pressure control device is used in the cell hot pressing and shaping process device. The air circuit assembly is provided with at least one set of high-pressure air circuit assembly and at least one set of low-pressure air circuit assembly. The air circuit assembly is connected to at least one controlled cylinder. The high-pressure air circuit assembly is provided with a high-pressure solenoid valve and a high-pressure electro-proportional valve. The low-pressure air circuit assembly is provided with a low-pressure solenoid valve and a low-pressure electro-proportional valve. The high-pressure air circuit assembly is provided with multiple stages of high-pressure air circuit assembly. The control pressure of the high-pressure electro-proportional valve of each stage of high-pressure air circuit assembly is different.

2. The cylinder air pressure control device as described in claim 1, characterized in that, The high-pressure air circuit assembly and the low-pressure air circuit assembly jointly control the air pressure of one of the cylinders.

3. The cylinder air pressure control device as described in claim 1, characterized in that, The high-pressure air circuit assembly and the low-pressure air circuit assembly jointly control the air pressure of the two cylinders.

4. The cylinder air pressure control device as described in claim 1, characterized in that, Each cylinder is controlled by a set of high-pressure air circuit components and a set of low-pressure air circuit components.

5. The cylinder air pressure control device as described in claim 1 or 4, characterized in that, Two sets of high-pressure air circuit components and two sets of low-pressure air circuit components are provided to control the air pressure of the two cylinders respectively.

6. The cylinder air pressure control device as described in claim 1, 2, or 3, characterized in that, The low-pressure gas circuit assembly is equipped with multiple stages of low-pressure gas circuit components, and the control pressure of the low-pressure electro-proportional valves in each stage of the low-pressure gas circuit assembly is different.

7. The cylinder air pressure control device as described in claim 1, characterized in that, The high-pressure air circuit assembly is provided with one set of primary high-pressure air circuit assembly and two sets of secondary high-pressure air circuit assembly. The air pressure of the cylinder is controlled by the primary high-pressure air circuit assembly, the secondary high-pressure air circuit assembly and the low-pressure air circuit assembly.

8. The cylinder air pressure control device as described in claim 6, characterized in that, The low-pressure air circuit assembly is provided with two sets of primary low-pressure air circuit assemblies and two sets of secondary low-pressure air circuit assemblies, and the air pressure of the cylinder is controlled by the high-pressure air circuit assembly, the primary low-pressure air circuit assembly and the secondary low-pressure air circuit assembly.

9. The cylinder air pressure control device according to any one of claims 1-4, characterized in that, The high-pressure electro-proportional valve and the low-pressure electro-proportional valve of the gas circuit assembly are high-precision electro-proportional valves.

10. The cylinder air pressure control device according to any one of claims 1-4, characterized in that, An induced check valve is provided between the high-pressure electro-proportional valve and the cylinder, and the induced check valve is connected to the high-pressure solenoid valve. An induced check valve is also provided between the low-pressure electro-proportional valve and the cylinder, and the induced check valve is connected to the low-pressure solenoid valve.

11. The cylinder air pressure control device according to any one of claims 1-4, characterized in that, The high-pressure solenoid valve and the low-pressure solenoid valve are connected to a muffler, and the cylinder is also connected to a muffler.

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