Pneumatic flexible displacement bistable ultrafast charging plug-free milliohm-level interface

Abstract

The invention discloses a pneumatic flexible displacement bistable ultrafast charging plugging-free milliohm-level interface, and belongs to the technical field of electronics. The device consists of a pneumatic component, an interface component, a control component and a power supply, wherein the pneumatic component comprises a normally closed electric inflator pump, a normally closed electric deflation valve, a latex tube and a flexible rubber hose with a net-shaped reinforcing rib; the interface part comprises a main contact and a monitoring point which can be made of 316L stainless steel sheets with the thickness of 0.3 mm and high oxidation resistance. The control component comprises a main controller containing solidified software, a charging main loop on-off control circuit and the like; the control part can control the inflator pump and the deflation valve to enable the main contact and the monitoring point to be automatically disconnected or connected, the contact resistance value of the power transmission main contact and the charging main contact can be smaller than 9 megohms in the stable connection state, and the disconnection resistance value of the power transmission main contact and the charging main contact can be larger than 10 megohms in the stable disconnection state. Compared with products sold in the current market, the electromagnetic radiation can be neglected, the charging power is large, the utilization rate of electric energy is high, manual plugging is not needed, and the charging device has important popularization value.

Description

TECHNICAL FIELD

[0001] The application is a pneumatic flexible displacement bistable super-fast charging plug-free milliohm level interface, belonging to the field of electronic technology. BACKGROUND

[0002] There are many users of chargeable devices such as mobile phones, chargeable spot welders, chargeable tin soldering irons, chargeable electric vehicles and chargeable portable refrigeration products in China, which often need to be charged. Many users have quite high requirements for the convenience of charging such devices. For this reason, many technology workers have developed hollow coil type wireless charging devices and magnetic type charging interfaces, which have brought convenience to many users, but the former has disadvantages such as electromagnetic radiation, and the maximum charging current of the latter is limited. The traditional plug-in interface products have the problems of being affected by dust and needing manual operation for plugging and unplugging, and the operation frequency may cause the contact resistance to increase. SUMMARY

[0003] The application is composed of pneumatic components, interface components, control components and power supply, the pneumatic components include normally closed electric air pump, normally closed electric air release valve, latex tube, soft rubber tube with mesh reinforcement, tight ring, reset spring and displacement guide rail, the latex tube is installed in the soft rubber tube with mesh reinforcement, the two ends of the latex tube are clamped by the tight ring respectively, and filler is added in advance if necessary; the two ends of the latex tube are connected with the air interface of the electric air pump and the air release interface of the electric air release valve respectively; the interface components include positive electrode main contactor for power transmission, negative electrode main contactor for power transmission, positive electrode monitoring point for power transmission, negative electrode monitoring point for power transmission, positive electrode main contactor for charging, negative electrode main contactor for charging, positive electrode monitoring point for charging and negative electrode monitoring point for charging, the contactors and monitoring points are made of good conductor resistant to oxidation, and the outer side of the positive electrode main contactor for power transmission and the negative electrode main contactor for power transmission can have spring sheet; the control components include main controller with solidified software, charging main loop on-off control circuit, sensor and emergency button, the output of the air supply of the main controller and the output of the air release power supply are connected with the power supply end of the electric air pump and the electric air release valve respectively; the pneumatic components, the positive electrode main contactor for power transmission, the negative electrode main contactor for power transmission, the positive electrode monitoring point for power transmission, the negative electrode monitoring point for power transmission, the main controller, the sensor, the emergency button and the power supply are installed in the charging seat; the output of the positive electrode monitoring point for power transmission, the negative electrode monitoring point for power transmission, the sensor, the output of the charging signal of the conventional fast charging circuit, the positive electrode and the negative electrode of the power supply are connected with one of the input ends of the main controller respectively, the corresponding start charging signal output end of the main controller is connected with one of the input ends of the conventional fast charging circuit when the interface components enter the stable state of connection; the positive electrode main contactor for charging, the negative electrode main contactor for charging, the positive electrode monitoring point for charging, the negative electrode monitoring point for charging and the charging main loop on-off control circuit of the interface components are installed on the equipment to be charged; the charging main loop on-off control circuit is in the stable state of disconnection in normal state, and the cross section of the soft rubber tube with mesh reinforcement and the latex tube is in flat or oval shape during the stable state of disconnection; under the condition of normal operation of the solidified software of the main controller, the main controller detects whether the equipment to be charged is placed in the set position of the charging seat at any time, when it is placed in the set position, the main controller supplies power to the air pump, the air pressure in the latex tube connected with the air pump increases, the cross section of the latex tube gradually changes from flat or oval shape to round shape, and the latex tube expands and becomes thick, which pushes the cross section of the soft rubber tube with mesh reinforcement to change from flat to round, and pushes the main contactors for power transmission and the monitoring points for power transmission to move to the corresponding main contactors for charging and monitoring points for charging respectively, so that they are in contact with each other, and the contact resistance value gradually decreases with the gradual increase of the pressure in the latex tube; after a predetermined time t cqAfter reaching the set value, the inflation pump will automatically stop inflating and be sealed, at this time the pressure in the latex tube can reach more than 6 kg per square centimeter, the contact resistance between the main contact and the charging main contact can be <9 mΩ; thereafter the main controller makes the charging main circuit from off to on, enters the on steady state, and sends a charging signal to the conventional fast charging circuit; after the charging is completed, the main controller receives the charging completion signal sent by the conventional fast charging circuit, and supplies power to the electric deflation valve, causing the latex tube connected to the deflation valve to deflate, and the deflation lasts for a predetermined time t fq After that, the main controller stops power supply to the normally closed electric deflation valve, and under the action of the reset spring, the cross section of the soft rubber tube with mesh reinforcement gradually changes from circular to flat or oval shape, and each power supply main contact and power supply monitoring point is separated from the corresponding charging main contact and charging monitoring point, with a distance ≥1 mm from each other, entering the off steady state, and the deflation valve enters the normally closed state after power off, preparing for the next inflation-charging; during the on steady state, if the user presses the emergency button, the main controller will supply power to the electric deflation valve, causing the latex tube connected to the deflation valve to deflate, and the user can take away the charged device; the aforementioned t cq <20s, t fq <10s. Positive significance

[0004] Compared with the hollow coil type wireless charging device or magnetic type charging device currently sold on the market, the present application can reduce electromagnetic radiation to a negligible level, and can greatly improve the charging power and energy utilization at a low cost. Moreover, no manual operation of "inserting the plug into the socket or inserting the socket into the plug" is required during charging, which is convenient for users and saves time. Therefore, the popularization and application of the present application has important significance. BRIEF DESCRIPTION OF DRAWINGS The present application will be further described below in conjunction with the drawings.

[0005] Figure 1 The basic principle diagram of an embodiment of the present application is described, Figure 1 In the figure, DQB represents a normally closed electric inflation pump, GQG represents a strong and highly elastic pneumatic rubber tube, DQF represents a normally closed electric deflation valve, DY represents a power supply, SZD represents a power supply positive electrode monitoring point, SZC represents a power supply positive electrode main contact, SFC represents a power supply negative electrode main contact, SFD represents a power supply negative electrode monitoring point, JAJ represents an emergency button, and CCD represents a conventional fast charging circuit. SZD, SZC, SFC, SFD and JAJ are installed on the charging seat. CZD represents a charging positive electrode monitoring point, CZC represents a charging positive electrode main contact, CFC represents a charging negative electrode main contact, CFD represents a charging negative electrode monitoring point, and ZTD represents a charging main circuit on-off control circuit. CZD, CZC, CFC, CFD and ZTD are installed on the charged device. Figure 1BCB represents the charged device, and the part surrounded by the dotted line on the right represents the part of the interface of the application directly connected to the charged device; CGQ represents a sensor or force-sensitive switch for detecting whether the charged device is placed in the designated position of the charging base, and the output level of CGQ changes with the "placement of the charged device in the designated position of the charging base or separation of the two". Figure 1 KZQ represents the master controller, which can control the electric air pump, the air release valve and ZTD according to the outputs of CGQ, SZD and SFD. Figure 1 The connection between DY and KZQ and the connection between KZQ and DQB and DQF are also shown.

[0006] Figure 2 is a diagram directly related to the pneumatic flexible displacement and disconnection of the interface in the disconnected state of an embodiment of the application, Figure 2 (a) is a front view after inflation or deflation, in which FTH represents a return spring; Figure 2 (b) is a sectional view of A1-A1'; Figure 2 (c) is a sectional view of B1-B1'. Figure 2 In (b), the number "10" in the circle represents the injection-molded hard plate of the left stopper, which is fixed on the charging base; the number "11" in the circle represents the plastic hose containing a nylon mesh tube, and "12" represents the high-elasticity latex hose inside "11"; this figure describes the flat or oval shape of "11" and "12" after inflation or deflation. "13" represents the injection-molded hard plate of the right stopper containing an arc-shaped stopper. Figure 2 In (c), "14" represents the sectional view or rear view of SZD, SZC, SFC and SFD, and "15" represents the sectional view or rear view of CZD, CZC, CFC and CFD; this figure describes the disconnected state of "14" and "15" after inflation or deflation, and the distance between them is ≥1 mm. Figure 2 The meanings of other characters are the same as described above Figure 1 .

[0007] Figure 3 is a diagram directly related to the pneumatic flexible displacement and connection of the interface in the connected steady state of an embodiment of the application, Figure 3 (a) is a front view after inflation and maintaining the rated air pressure, in which FTH represents a return spring; Figure 3 (b) is a sectional view of A2-A2'; Figure 3 (c) is a sectional view of B2-B2'. Figure 3 In (b), the number "20" in the circle represents the injection-molded hard plate of the left stopper, which is fixed on the charging base; "21" represents the plastic hose containing a nylon mesh tube during inflation, "22" represents the high-elasticity latex hose inside "21" during inflation, and "23" represents the injection-molded hard plate of the right stopper containing an arc-shaped stopper.Figure 3 (c) in which "24" represents the profile or front view of the SZD, SZC, SFC and SFD when inflated, and "25" represents the profile or front view of the CZD, CZC, CFC and CFD when inflated, the inner surface represented by "24" coinciding with the outer surface represented by "25", which is the connected steady state due to the inflation pressure. Figure 3 The meanings of the other characters are the same as described above Figure 1 with respect to the related description.

[0008] Figure 4 is Figure 1 is an implementable schematic circuit diagram of KZQ in MOS1 and T MOS2 each represent a P-channel MOS transistor, R 41 , R 42 , R G1 and R G1 each represent a metal film resistor; I / O1 and I / O1 each represent a digital input / output port of the μP, which is in a high impedance state in the normal state; A IN1 may be an analog or digital input port; A IN2 , A IN3 , A IN4 and A IN5 each represent an analog input port of the μP, and the meanings of the other characters are the same as described above Figure 1 with respect to the related description.

[0009] Figure 5 is Figure 1 is an implementable schematic circuit diagram of ZTD in MOS3 represents a P-channel MOS transistor, SYG3 represents a bidirectional limiting voltage regulator tube, R1, R G3 and R 51 each represent a metal film resistor; and the meanings of the other characters are the same as described above Figure 1 with respect to the related description. DETAILED DESCRIPTION A specific embodiment directly related to the present application is described below.

[0010] Figure 1 DQB in which the maximum air pressure can reach 10 kg / cm2, and the inflation rate can be more than 0.1 liter / 12V-24V power supply per second, and DQF can be a 12V-24V power supply normally closed air release valve, which can withstand an air pressure of 10 kg / cm2, and the air release rate can be more than 0.05 liter per second.Figure 1 The materials for making SZD, SZC, SFC, SFD, CZD, CZC, CFC and CFD can be 0.3mm thick 316L stainless steel sheets or 0.1mm thick 925 silver-copper alloy sheets. The area of ​​SZD, SFD, CZD and CFD shall not be less than 2mm*6mm, and the area of ​​SZC, SFC, CZC and CFC shall not be less than 38mm*6mm. Figure 1 The JAJ in the system can choose a normally open micro button, and the CGQ can choose a normally open force-sensitive pressure switch. When it is subjected to a pressure of more than 0.05kg, it can change from a normally open state to a closed state. Figure 1 R1 and R2 can be selected as 0.25W 33kΩ metal film resistors with a tolerance level of 5%.

[0011] Figure 2 Medium FTH uses a weak force spring made of φ0.05mm to φ0.1mm stainless steel wire, and its length can be about 30mm under normal conditions. Figure 2 (b) The thickness of the number "10" in the circle can be 3mm; the plastic hose containing nylon mesh tube represented by "11" can be made of 22mm outer diameter and 2mm wall thickness; "12" represents the high elastic latex hose in "11", its outer diameter can be 12mm and its wall thickness can be 2mm; the thickness of "13" can be 3mm; SZD, SZC, SFC, SFD represented by "14" and CZD, CZC, CFC, CFD represented by "15" can be made of 0.3mm thick 316L stainless steel sheet with strong oxidation resistance.

[0012] Figure 3 The spring represented by FTH can be shortened to about 22mm when it is subjected to a pressure of more than 2kg. Figure 3 (b) The thickness of the circled number "20" can be 3mm; Figure 3 In (c), the inner surfaces of the SZD, SZC, SFC, and SFD (represented by the circled number "24") and the outer surfaces of the CZD, CZC, CFC, and CFD (represented by the circled number "25") are in contact with each other. Under a pressure of 6 kg / cm², the contact resistance between the SZC and CZC can be less than 9 mΩ, and the contact resistance between the SFC and CFC can also be less than 9 mΩ.

[0013] Figure 4 JYD stands for step-down circuit, which can reduce the 12V to 24V DC power supply to 5V DC power supply; Figure 4 Middle T MOS1 and T MOS2Each of the low-speed P-channel MOS transistors can be selected from a low-speed P-channel MOS transistor with an on-resistance value < 9 mΩ, a voltage resistance not lower than 40 V, and a continuous on-current not less than 80 A, such as NCEP40P80K, which has an on-resistance value ≤ 5.6 mΩ; each of SYG1 and SYG2 can be selected from a 0.5 W + 16 V bidirectional limiting voltage stabilizer; R 41 and R 42 Each of the metal film resistors can be selected from a 0.25 W 300 kΩ metal film resistor with an error level of 5%. G1 and R G2 Each of the metal film resistors can be selected from a 0.5 W 300 Ω metal film resistor with an error level of 5%. Figure 4 In the I / O1 and I / O1 of μP, each of them needs to be in a high resistance state.

[0014] Figure 5 In the T MOS3 Each of the low-speed P-channel MOS transistors can be selected from a low-speed P-channel MOS transistor with an on-resistance value < 9 mΩ, a voltage resistance not lower than 40 V, and a continuous on-current not less than 80 A, such as NCEP40P80K; SYG3 can be selected from a 0.5 W + 16 V bidirectional limiting voltage stabilizer; R1 can be selected from a 0.25 W 33 kΩ metal film resistor with an error level of 5%. 51 Each of the metal film resistors can be selected from a 0.25 W 300 kΩ metal film resistor with an error level of 5%. G3 Each of the metal film resistors can be selected from a 0.5 W 300 Ω metal film resistor with an error level of 5%.

[0015] Figure 4 The single-chip microcomputer or IC model of programmable gate array represented by μP can be selected according to the programming habits of the researchers and the like, and a quartz crystal and a monolithic capacitor can be selected as C1 and C2. As for the displacement guide rail, it can be purchased on the market, and will not be described here.

Claims

1. A pneumatic flexible displacement bi-stable ultrafast charging plugless milli-ohmic interface, characterized by: It is composed of pneumatic components, interface components, control components and power supply, pneumatic components including normally closed electric air pump, normally closed electric air release valve, latex tube, soft rubber tube containing mesh reinforcement, tight ring, reset spring and displacement guide, the latex tube is installed in the soft rubber tube containing mesh reinforcement, its two ends are clamped with tight ring respectively, and filling is needed in advance if necessary; the two ends of the latex tube are connected with the air interface of the electric air pump and the air release interface of the electric air release valve respectively; the interface components include positive main contact for power transmission, negative main contact for power transmission, positive monitoring point for power transmission, negative monitoring point for power transmission, positive main contact for charging, negative main contact for charging, positive monitoring point for charging and negative monitoring point for charging, these contacts and monitoring points are made of good conductor resistant to oxidation, and the outside of the positive main contact for power transmission and the negative main contact for power transmission can have spring sheet; the control components include main controller containing solidified software, charging main circuit on-off control circuit, sensor and emergency button, the output of the air supply of the main controller and the output of the air release power are connected with the power supply end of the electric air pump and the electric air release valve respectively; the pneumatic components, the positive main contact for power transmission, the negative main contact for power transmission, the positive monitoring point for power transmission, the negative monitoring point for power transmission, the main controller, the sensor, the emergency button and the power supply are installed in the charging seat; the output of the positive monitoring point for power transmission, the negative monitoring point for power transmission, the sensor, the output of the charging signal of the conventional fast charging circuit, the positive and negative of the power supply are connected with one of the input ends of the main controller respectively, and the corresponding start charging signal output end of the main controller is connected with one of the input ends of the conventional fast charging circuit when the interface components enter the stable state of connection; the positive main contact for charging, the negative main contact for charging, the positive monitoring point for charging, the negative monitoring point for charging and the charging main circuit on-off control circuit of the interface components are installed on the charged equipment; the charging main circuit on-off control circuit is in the stable state of disconnection in normal state, and the cross section of the soft rubber tube containing mesh reinforcement and the latex tube is flat or oval during the stable state of disconnection; under the condition of normal operation of the main controller solidified software, the main controller detects whether the charged equipment is placed in the set position of the charging seat at any time, when it is placed in the set position, the main controller supplies power to the air pump, the air pressure in the latex tube connected with the air pump increases, the cross section of the latex tube gradually changes from flat or oval to round, and the soft rubber tube containing mesh reinforcement is pushed to change from flat to round, the main contacts for power transmission and the monitoring points for power transmission are pushed to move to the corresponding main contacts for charging and monitoring points for charging respectively, so that they are in contact with each other, and the contact resistance value gradually decreases with the gradual increase of the pressure in the latex tube; after a predetermined time t cq After that, when reaching the set value, the inflation pump will automatically stop inflating and be sealed; at this time, the pressure in the latex tube can reach more than 6 kg per square centimeter, and the contact resistance between the main contact and the charging main contact can be <9 mΩ; thereafter, the main controller makes the charging main circuit from off to on, enters the on steady state, and sends a charging signal to the conventional fast charging circuit; after the charging is completed, the main controller receives the charging completion signal sent by the conventional fast charging circuit, and supplies power to the electric deflation valve, so that the latex tube connected with the deflation valve is deflated; after the deflation lasts for a predetermined time tfq, the main controller makes the normally closed electric deflation valve stop supplying power, under the action of the reset spring, the cross section of the soft rubber tube and the latex tube with the reticular reinforcing rib gradually changes from circular to flat or elliptical shape, each power supply main contact and power supply monitoring point is separated from the corresponding charging main contact and charging monitoring point, and the distance between them is ≥1 mm, entering the off steady state, after power off, the deflation valve enters the closed normal state, preparing for the next inflation-charging; during the on steady state, if the user presses the emergency button, the main controller will supply power to the electric deflation valve, so that the latex tube connected with the deflation valve is deflated, and the user can take away the charged equipment; the aforementioned t cq <20s, t fq <10s.

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