Vacuum air control system

Abstract

The present application relates to the field of valve technology and discloses a vacuum air control system, including a mounting frame and a pressure-maintaining diaphragm valve, a vacuum-breaking diaphragm valve, a control assembly, and a pressure sensor disposed on the mounting frame. The mounting frame is provided with a first ventilation channel, a pressure-maintaining connection channel, a vacuum-breaking connection channel, a vacuum-breaking channel, and an air extraction channel. The first ventilation channel is connected to the pressure-maintaining connection channel and the vacuum-breaking connection channel. Gas is input to the pressure-maintaining diaphragm valve and the vacuum-breaking diaphragm valve through the first ventilation channel. The control assembly controls the opening and closing of the connection channel. When the pressure-maintaining diaphragm valve is opened and the vacuum-breaking diaphragm valve is closed, negative pressure is achieved in the lithium battery. When the pressure-maintaining diaphragm valve is closed and the vacuum-breaking diaphragm valve is closed, pressure is maintained in the lithium battery. When the vacuum-breaking diaphragm valve is opened and the pressure-maintaining diaphragm valve is closed, pressure is increased in the lithium battery. The pressure sensor is used to monitor the pressure in the lithium battery in real time. The present application has the effect of integrating pressure maintenance, pressure increase, and negative pressure of the lithium battery.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a vacuum air control system. Background Art

[0002] The lithium core in the lithium battery is anaerobic, and when the lithium battery is formed under negative pressure, a large amount of gas will be generated during the formation process. The lithium battery needs to be vacuumed to reduce the possibility of lithium precipitation. Therefore, the lithium battery needs to be negatively pressured and ozone treated.

[0003] The traditional control method consists of separate parts, which increases the volume of the equipment structure and consumes a lot of manpower during assembly. In addition, during the process of negative pressurizing the lithium battery, it is impossible to accurately control the pressure inside the lithium battery. Summary of the Invention

[0004] In order to monitor the pressure inside the lithium battery in real time, accurately control the pressure inside the lithium battery, and integrate the multi-functions of the valve body, the present application provides a vacuum air control system.

[0005] The vacuum air control system provided in this application adopts the following technical solution:

[0006] A vacuum air control system comprising:

[0007] The mounting frame is provided with a first ventilation channel, a pressure-maintaining connection channel, a vacuum-breaking connection channel, a vacuum-breaking channel and an air extraction channel. The first ventilation channel is connected to the pressure-maintaining connection channel and the vacuum-breaking connection channel. One end of the first ventilation channel is connected to a positive pressure interface, one end of the vacuum-breaking connection channel is connected to an atmospheric interface, a vacuum source interface is provided on one side of the air extraction channel, the other ends of the vacuum-breaking channel and the air extraction channel are connected to a lithium battery interface group, and the lithium battery interface group is connected to a lithium battery;

[0008] a pressure-maintaining diaphragm valve, provided on the mounting frame and located at the air extraction channel, the pressure-maintaining diaphragm valve being used to control the on-off of the air flow in the air extraction channel;

[0009] a vacuum breaking diaphragm valve, provided on the mounting frame and located at the vacuum breaking channel, the vacuum breaking diaphragm valve being used to control the on-off of the airflow in the vacuum breaking channel;

[0010] A control assembly, provided on the mounting frame, for controlling the opening and closing of the pressure-maintaining diaphragm valve and the vacuum-breaking diaphragm valve;

[0011] The pressure sensor is arranged on the mounting frame and is used to detect the pressure inside the lithium battery.

[0012] Based on the above technical solution, the first ventilation channel is connected with the pressure-maintaining connecting channel and the vacuum-breaking connecting channel, and gas is input to the pressure-maintaining diaphragm valve and the vacuum-breaking diaphragm valve through the first ventilation channel. At the same time, the switch of the connecting channel is controlled by the control component. When the pressure-maintaining diaphragm valve is opened and the vacuum-breaking diaphragm valve is closed, the lithium battery is evacuated through the exhaust channel to achieve negative pressure in the lithium battery; when the pressure-maintaining diaphragm valve is closed and the vacuum-breaking diaphragm valve is closed, the exhaust channel from the vacuum source interface to the negative pressure interface is blocked, so that the lithium battery is in a pressure-maintaining state; when the vacuum-breaking diaphragm valve is opened and the pressure-maintaining diaphragm valve is closed, gas is input through the vacuum-breaking channel to achieve pressurization of the lithium battery; and the pressure inside the lithium battery is monitored in real time by a pressure sensor.

[0013] Preferably, the control component includes a pressure-maintaining pilot valve, and the pressure-maintaining pilot valve includes a pressure-maintaining control block and a pressure-maintaining limit rod. The pressure-maintaining control block is slidingly connected to the pressure-maintaining limit rod. A pressure-maintaining ventilation groove is provided between the pressure-maintaining control block and the mounting frame. The pressure-maintaining control block is adapted to the pressure-maintaining ventilation groove. The first ventilation channel and the pressure-maintaining connecting channel are connected through the pressure-maintaining ventilation groove. The pressure-maintaining control block moves along the Z-axis direction to control the on-off between the first ventilation channel and the pressure-maintaining connecting channel.

[0014] Based on the above technical solution, gas is input into the first ventilation channel, and when the pressure-maintaining control block is in contact with the pressure-maintaining ventilation groove, the communication between the first ventilation channel and the pressure-maintaining connecting channel is restricted, so that the pressure-maintaining diaphragm valve is in a closed state, thereby achieving pressure maintenance of the lithium battery; when the pressure-maintaining control block is separated from the pressure-maintaining ventilation groove, the first ventilation channel is connected to the pressure-maintaining connecting channel, so that the pressure-maintaining diaphragm valve is in an open state, thereby achieving negative pressure of the lithium battery.

[0015] Preferably, the first ventilation channel is provided with a first pressure-maintaining ventilation channel toward the pressure-maintaining control block, and the pressure-maintaining connecting channel is provided with a second pressure-maintaining ventilation channel toward the pressure-maintaining control block, and the first pressure-maintaining ventilation channel and the second pressure-maintaining ventilation channel are connected through the pressure-maintaining ventilation groove.

[0016] Based on the above technical solution, the gas input into the first ventilation channel enters the pressure-maintaining connecting channel through the first pressure-maintaining ventilation channel and the second pressure-maintaining ventilation channel in sequence, so that the gas enters the pressure-maintaining diaphragm valve to realize the switching of the pressure-maintaining diaphragm valve.

[0017] Preferably, the control component includes a vacuum breaking pilot valve, and the vacuum breaking pilot valve includes a vacuum breaking control block and a vacuum breaking limit rod. The vacuum breaking control block is slidingly connected to the vacuum breaking limit rod. A vacuum breaking ventilation groove is provided between the vacuum breaking control block and the mounting bracket. The vacuum breaking control block is adapted to the vacuum breaking ventilation groove. The first ventilation channel and the vacuum breaking connecting channel are connected through the vacuum breaking ventilation groove. The vacuum breaking control block moves along the Z-axis direction to control the on-off between the first ventilation channel and the vacuum breaking connecting channel.

[0018] Based on the above technical solution, gas is input into the first ventilation channel. When the vacuum breaking control block is in contact with the vacuum breaking ventilation groove, the communication between the first ventilation channel and the vacuum breaking connecting channel is restricted, so that the vacuum breaking diaphragm valve is in a closed state, thereby realizing the pressure maintenance and negative pressure of the lithium battery; when the vacuum breaking control block is separated from the vacuum breaking ventilation groove, the first ventilation channel is connected to the vacuum breaking connecting channel, so that the vacuum breaking diaphragm valve is in an open state, thereby realizing the pressurization of the lithium battery.

[0019] Preferably, the first ventilation channel is provided with a first vacuum breaking ventilation channel toward the vacuum breaking control block, the vacuum breaking connecting channel is provided with a second vacuum breaking ventilation channel toward the vacuum breaking control block, and the first vacuum breaking ventilation channel and the second vacuum breaking ventilation channel are connected through the vacuum breaking ventilation groove.

[0020] Based on the above technical solution, the gas inputted from the first ventilation channel enters the vacuum breaking connecting channel through the first vacuum breaking ventilation channel and the second vacuum breaking ventilation channel in sequence, thereby allowing the gas to enter the vacuum breaking diaphragm valve to realize the switching of the vacuum breaking diaphragm valve.

[0021] Preferably, the pressure-maintaining diaphragm valve includes a pressure-maintaining valve cover, a pressure-maintaining spring, a pressure-maintaining valve stem and a pressure-maintaining diaphragm, the pressure-maintaining valve cover is connected to the mounting frame, one end of the pressure-maintaining spring is connected to the pressure-maintaining valve cover, the other end of the pressure-maintaining spring is connected to the pressure-maintaining valve stem, the pressure-maintaining valve stem and the pressure-maintaining diaphragm are connected, a pressure-maintaining atmospheric chamber is formed between the pressure-maintaining valve stem and the pressure-maintaining valve cover, a pressure-maintaining pressure chamber is formed between the pressure-maintaining valve stem and the pressure-maintaining diaphragm, and the pressure-maintaining pressure chamber is communicated with the pressure-maintaining connecting channel.

[0022] Based on the above technical solution, gas enters the pressure-maintaining pressure chamber through the first ventilation channel and the pressure-maintaining connecting channel, thereby increasing the pressure of the pressure-maintaining pressure chamber. When the pressure of the pressure-maintaining pressure chamber is higher than that of the pressure-maintaining atmospheric chamber, the pressure-maintaining valve stem drives the pressure-maintaining diaphragm to rise to open the pressure-maintaining diaphragm valve, thereby realizing the circulation of gas in the exhaust channel and applying negative pressure to the lithium battery; when the input of gas into the pressure-maintaining pressure chamber is stopped, under the action of the elastic force of the pressure-maintaining spring, the pressure-maintaining valve stem drives the pressure-maintaining diaphragm to move downward to close the pressure-maintaining diaphragm valve, thereby limiting the circulation of gas in the exhaust channel to achieve pressure maintenance of the lithium battery.

[0023] Preferably, the vacuum breaking diaphragm valve includes a vacuum breaking valve cover, a vacuum breaking spring, a vacuum breaking valve stem and a vacuum breaking diaphragm, the vacuum breaking valve cover is connected to the mounting frame, one end of the vacuum breaking spring is connected to the vacuum breaking valve cover, the other end of the vacuum breaking spring is connected to the vacuum breaking valve stem, the vacuum breaking valve stem and the vacuum breaking diaphragm are connected, a vacuum breaking atmospheric chamber is formed between the vacuum breaking valve stem and the vacuum breaking valve cover, a vacuum breaking pressure chamber is formed between the vacuum breaking valve stem and the vacuum breaking diaphragm, and the vacuum breaking pressure chamber is communicated with the vacuum breaking connecting channel.

[0024] Based on the above technical solution, gas enters the vacuum breaking pressure chamber through the first ventilation channel and the vacuum breaking connecting channel, thereby increasing the pressure of the vacuum breaking pressure chamber. When the pressure of the vacuum breaking pressure chamber is higher than that of the vacuum breaking atmospheric chamber, the vacuum breaking valve stem drives the vacuum breaking diaphragm to rise to open the vacuum breaking diaphragm valve, thereby realizing the circulation of gas in the vacuum breaking channel and pressurizing the lithium battery; when the input of gas into the vacuum breaking pressure chamber is stopped, under the action of the elastic force of the vacuum breaking spring, the vacuum breaking valve stem drives the vacuum breaking diaphragm to move downward, realizing the closure of the vacuum breaking diaphragm valve, thereby limiting the circulation of gas in the vacuum breaking channel.

[0025] Preferably, the first ventilation channel is connected to a first ventilation pipe, a vacuum proportional valve is provided on one side of the first ventilation pipe, the first ventilation pipe is used to ventilate the vacuum proportional valve, the vacuum proportional valve is provided between the exhaust channel and the vacuum source interface, and the vacuum proportional valve is used to adjust the airflow rate in the exhaust channel.

[0026] Based on the above technical solution, the air flow rate in the exhaust channel is controlled by a vacuum proportional valve. The vacuum proportional valve is used in conjunction with a pressure sensor to monitor the pressure inside the lithium battery in real time and accurately control the pressure inside the lithium battery.

[0027] Preferably, an electrical proportional valve is arranged between the vacuum proportional valve and the first ventilation pipe, and a second ventilation pipe is arranged between the electrical proportional valve and the vacuum proportional valve. The first ventilation pipe is connected to the vacuum proportional valve through the electrical proportional valve and the second ventilation pipe in sequence, and the electrical proportional valve is used to control the flow rate of the airflow in the vacuum proportional valve.

[0028] Based on the above technical solution, the amount of gas input into the vacuum proportional valve is controlled by the electric proportional valve, thereby controlling the flow of gas in the vacuum proportional valve and thus controlling the flow of gas in the exhaust channel.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. The control component controls the on / off of the pressure-maintaining diaphragm valve and the vacuum-breaking diaphragm valve. When the pressure-maintaining diaphragm valve is open and the vacuum-breaking diaphragm valve is closed, the lithium battery is evacuated through the exhaust channel to achieve negative pressure in the lithium battery. When the pressure-maintaining diaphragm valve and the vacuum-breaking diaphragm valve are closed, the exhaust channel from the vacuum source interface to the negative pressure interface is blocked, so that the lithium battery is in a pressure-maintaining state. When the vacuum-breaking diaphragm valve is open and the pressure-maintaining diaphragm valve is closed, gas is input through the vacuum-breaking channel to achieve pressurization of the lithium battery. The pressure sensor monitors the pressure in the lithium battery in real time.

[0031] 2. The flow rate of gas in the exhaust channel is adjusted by cooperating with the vacuum proportional valve and the pressure sensor;

[0032] 3. Automatically control the flow of gas in the vacuum proportional valve through the electric proportional valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the overall structure of the vacuum air control system according to an embodiment of the present application is depicted;

[0034] Figure 2 A partial structural diagram of the vacuum air control system of an embodiment of the present application is depicted, mainly used to illustrate the valve body structure in the cover body;

[0035] Figure 3 A cross-sectional view of the vacuum air control system of an embodiment of the present application is shown, mainly used to illustrate the structure of the negative pressure part;

[0036] Figure 4 A cross-sectional view of a vacuum air control system according to an embodiment of the present application is shown, which is mainly used to illustrate the air delivery channel of the pressure-maintaining diaphragm valve in the mounting frame;

[0037] Figure 5 A cross-sectional view of a vacuum air control system according to an embodiment of the present application is shown, which is mainly used to illustrate the structure of a pressure-maintaining diaphragm valve;

[0038] Figure 6A cross-sectional view of a vacuum air control system according to an embodiment of the present application is shown, which is mainly used to illustrate the air supply passage of the vacuum rupture diaphragm valve in the mounting frame;

[0039] Figure 7 A cross-sectional view of a vacuum air control system according to an embodiment of the present application is shown, which is mainly used to illustrate the structure of the vacuum breaking diaphragm valve and the gas transmission channel of the vacuum breaking channel;

[0040] Figure 8 A schematic diagram of the overall structure of the electric proportional valve and the vacuum proportional valve of the vacuum air control system of an embodiment of the present application is depicted;

[0041] Figure 9 Draws Figure 8 Schematic diagram of the structure from different perspectives;

[0042] Figure 10 A cross-sectional view of an electric proportional valve of a vacuum air control system according to an embodiment of the present application is shown;

[0043] Figure 11 A cross-sectional view of a vacuum proportional valve of a vacuum air control system according to an embodiment of the present application is shown.

[0044] Explanation of the reference numerals: 10, mounting frame; 11, cover; 12, exhaust channel; 121, first exhaust channel; 122, second exhaust channel; 13, first ventilation channel; 14, first pressure-maintaining ventilation channel; 141, second pressure-maintaining ventilation channel; 15, pressure-maintaining connecting channel; 16, vacuum-breaking channel; 161, first vacuum-breaking channel; 162, second vacuum-breaking channel; 17, first vacuum-breaking ventilation channel; 171, second vacuum-breaking ventilation channel; 18, vacuum-breaking connecting channel; 20, pressure-maintaining diaphragm valve; 21, pressure-maintaining valve cover; 22, pressure-maintaining spring; 23, pressure-maintaining Pressure valve stem; 24, pressure-maintaining diaphragm; 25, pressure-maintaining pressure chamber; 26, pressure-maintaining atmospheric chamber; 27, pressure-maintaining air inlet interface; 28, pressure-maintaining exhaust interface; 29, pressure-maintaining air pipe; 30, vacuum-breaking diaphragm valve; 31, vacuum-breaking valve cover; 32, vacuum-breaking spring; 33, vacuum-breaking valve stem; 34, vacuum-breaking diaphragm; 35, vacuum-breaking pressure chamber; 36, vacuum-breaking atmospheric chamber; 37, vacuum-breaking air inlet interface; 38, vacuum-breaking exhaust interface; 39, vacuum-breaking air pipe; 40, electric proportional valve; 41, main valve body; 411, air inlet; 412, air outlet; 4 13. Exhaust port; 42. Bottom cover; 43. Intermediate valve body; 44. Pilot seat; 441. Upper chamber; 442. Lower chamber; 45. Control box; 451. Transparent window; 452. Control button; 46. First diaphragm; 47. First valve stem; 48. First valve core; 49. Second valve core; 50. Vacuum proportional valve; 51. Main valve seat; 511. Vacuum air inlet; 512. Vacuum air outlet; 52. Pilot seat; 53. Second diaphragm; 54. Second valve stem; 55. Third valve core; 56. Mounting seat; 57. First spring; 58. Vacuum atmosphere chamber; 59. Ventilation chamber; 60. Positive pressure interface; 61. Atmospheric interface; 62. Lithium battery interface group; 621. Negative pressure interface; 622. Vacuum breaking interface; 63. Vacuum source interface; 64. First air inlet interface; 65. First air outlet interface; 66. First ventilation pipe; 67. Second ventilation pipe; 70. Control assembly; 71. Pressure maintaining pilot valve; 711. Pressure maintaining control block; 712. Pressure maintaining limit rod; 72. Vacuum breaking pilot valve; 721. Vacuum breaking control block; 722. Vacuum breaking limit rod; 80. Pressure sensor; 90. Mounting block; 91. Mounting hole. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-11 This application is described in further detail.

[0046] The embodiment of the present application discloses a vacuum air control system.

[0047] Reference Figure 1 and Figure 2The vacuum air control system includes a mounting frame 10 and a pressure-maintaining diaphragm valve 20, a vacuum-breaking diaphragm valve 30, an electric proportional valve 40 and a vacuum proportional valve 50 arranged on the mounting frame 10. A plurality of air paths are opened in the mounting frame 10. A positive pressure interface 60 is provided on one side of the mounting frame 10. The positive pressure interface 60 is connected with the pressure-maintaining diaphragm valve 20, the vacuum-breaking diaphragm valve 30 and the electric proportional valve 40 through the air path, and is used to ventilate the pressure-maintaining diaphragm valve 20, the vacuum-breaking diaphragm valve 30 and the electric proportional valve 40; an atmospheric interface 61 is provided on the side opposite to the positive pressure interface 60, a lithium battery interface group 62 is provided on one side of the vacuum-breaking diaphragm valve 30, and a vacuum source interface 63 is provided at one end of the vacuum proportional valve 50. The lithium battery interface group 62 is connected with the atmospheric interface 61 and the vacuum source interface 63 through the air path, so as to realize negative pressure and pressurization of the lithium battery.

[0048] Reference Figure 2 and Figure 3 The lithium battery interface group 62 includes a negative pressure interface 621, one end of the negative pressure interface 621 is connected to the lithium battery, and an exhaust channel 12 is opened in the mounting frame 10. The other end of the negative pressure interface 621 is connected to one end of the exhaust channel 12, and the other end of the exhaust channel 12 is connected to the vacuum proportional valve 50. The vacuum proportional valve 50 is connected to the vacuum source interface 63. The air in the lithium battery is extracted through the vacuum source interface 63 to achieve negative pressure in the lithium battery.

[0049] Reference Figure 3 The air pumping channel 12 includes a first air pumping channel 121 and a second air pumping channel 122 . The first air pumping channel 121 is connected to the second air pumping channel 122 . The pressure-maintaining diaphragm valve 20 is arranged at the connection point between the first air pumping channel 121 and the second air pumping channel 122 .

[0050] Reference Figure 4 and Figure 5The pressure-maintaining diaphragm valve 20 includes a pressure-maintaining valve cover 21, a pressure-maintaining spring 22, a pressure-maintaining valve stem 23 and a pressure-maintaining diaphragm 24. The pressure-maintaining valve cover 21 is fixedly connected to the mounting frame 10 through a fixing member, wherein the fixing member is a fastening structure such as a bolt or a screw; the pressure-maintaining valve stem 23 is slidingly arranged in the pressure-maintaining valve cover 21, one end of the pressure-maintaining spring 22 abuts against the top end of the inner surface of the pressure-maintaining valve cover 21, and the other end of the pressure-maintaining spring 22 abuts against the upper surface of the pressure-maintaining valve stem 23, and the pressure-maintaining diaphragm 24 is fixedly arranged in the pressure-maintaining valve cover 21. One end of the pressure-maintaining valve stem 23 away from the pressure-maintaining spring 22 abuts against the pressure-maintaining diaphragm 24. The pressure-maintaining diaphragm 24 is made of elastic material. A pressure-maintaining pressure chamber 25 is formed between the pressure-maintaining valve stem 23 and the pressure-maintaining diaphragm 24. A pressure-maintaining atmospheric chamber 26 is formed between the pressure-maintaining valve stem 23 and the pressure-maintaining valve cover 21. A pressure-maintaining air inlet interface 27 and a pressure-maintaining exhaust interface 28 are provided on one side of the pressure-maintaining valve cover 21. The pressure-maintaining air inlet interface 27 is connected to the pressure-maintaining pressure chamber 25, and the pressure-maintaining exhaust interface 28 is connected to the pressure-maintaining atmospheric chamber 26.

[0051] Reference Figure 3 and Figure 5 , by introducing gas into the pressure-maintaining pressure chamber 25, the pressure in the pressure-maintaining pressure chamber 25 is increased. When the pressure in the pressure-maintaining pressure chamber 25 is higher than the pressure in the pressure-maintaining atmospheric chamber 26, the pressure-maintaining valve stem 23 and the pressure-maintaining diaphragm 24 move upward under the action of the pressure difference, thereby realizing the circulation of airflow in the first air pumping channel 121 and the second air pumping channel 122; after stopping the ventilation of the pressure-maintaining pressure chamber 25, the pressure-maintaining diaphragm valve 20 is in a closed state under the action of the pressure-maintaining spring 22, and the pressure-maintaining diaphragm 24 and the pressure-maintaining valve stem 23 block the connection between the first air pumping channel 121 and the second air pumping channel 122, thereby blocking the circulation of airflow between the first air pumping channel 121 and the second air pumping channel 122, thereby maintaining the pressure in the lithium battery and realizing the pressure-maintaining state of the lithium battery;

[0052] Reference Figure 2 、 Figure 4 and Figure 5The mounting frame 10 is provided with a first ventilation channel 13, a first pressure-maintaining ventilation channel 14, a second pressure-maintaining ventilation channel 141 and a pressure-maintaining connecting channel 15. The first ventilation channel 13 is connected to the first pressure-maintaining ventilation channel 14. A control component 70 is provided above the first pressure-maintaining ventilation channel 14. Under the action of the control component 70, the gas in the first pressure-maintaining ventilation channel 14 flows into the second pressure-maintaining ventilation channel 141. The second pressure-maintaining ventilation channel 141 is connected to the pressure-maintaining connecting channel 15. The pressure-maintaining connecting channel 15 A pressure-maintaining air supply pipe 29 is provided above, one end of the pressure-maintaining air supply pipe 29 is connected to the pressure-maintaining connecting channel 15, and the other end of the pressure-maintaining air supply pipe 29 is connected to the pressure-maintaining air inlet interface 27. The gas passes through the first ventilation channel 13, the first pressure-maintaining air channel 14, the second pressure-maintaining air channel 141, the pressure-maintaining connecting channel 15, the pressure-maintaining air supply pipe 29 and the pressure-maintaining air inlet interface 27 in sequence to enter the pressure-maintaining pressure chamber 25, thereby realizing the change of pressure in the pressure-maintaining pressure chamber 25, thereby realizing the switching of the pressure-maintaining diaphragm valve 20.

[0053] Reference Figure 2 and Figure 4 The control component 70 includes a pressure-maintaining pilot valve 71, and the pressure-maintaining pilot valve 71 includes a pressure-maintaining control block 711 and a pressure-maintaining limit rod 712. The pressure-maintaining control block 711 is slidingly connected to the pressure-maintaining limit rod 712, and the pressure-maintaining control block 711 can move up and down along the Z-axis direction. A pressure-maintaining vent groove is provided on the mounting frame 10, and the size and shape of the pressure-maintaining vent groove are adapted to the size and shape of the pressure-maintaining control block 711. When the pressure-maintaining control block 711 moves downward, the pressure-maintaining control block 711 blocks the flow of gas between the first pressure-maintaining vent channel 14 and the second pressure-maintaining vent channel 141. When the pressure-maintaining control block 711 moves upward, the flow of gas between the first pressure-maintaining vent channel 14 and the second pressure-maintaining vent channel 141 is realized.

[0054] Reference Figure 6 and Figure 7 The lithium battery interface group 62 also includes a vacuum breaking interface 622. A vacuum breaking channel 16 is opened in the mounting frame 10. The vacuum breaking channel 16 includes a first vacuum breaking channel 161 and a second vacuum breaking channel 162. One end of the first vacuum breaking channel 161 is connected to the atmospheric interface 61, and the other end of the first vacuum breaking channel 161 is connected to the second vacuum breaking channel 162. The second vacuum breaking channel 162 is connected to the vacuum breaking interface 622. The gas enters the lithium battery through the atmospheric interface 61, the first vacuum breaking channel 161, the second vacuum breaking channel 162 and the vacuum breaking interface 622 in sequence, thereby achieving pressurization of the lithium battery; the vacuum breaking diaphragm valve 30 is arranged between the first vacuum breaking channel 161 and the second vacuum breaking channel 162 to control the on and off of the airflow between the first vacuum breaking channel 161 and the second vacuum breaking channel 162.

[0055] Reference Figure 7The vacuum breaking diaphragm valve 30 includes a vacuum breaking valve cover 31, a vacuum breaking spring 32, a vacuum breaking valve stem 33 and a vacuum breaking diaphragm 34. The vacuum breaking valve cover 31 is fixedly connected to the mounting frame 10 through a connecting piece, wherein the connecting piece is a fastening structure such as a bolt or a screw; the vacuum breaking valve stem 33 slides along the Z-axis direction, the vacuum breaking spring 32 is arranged between the inner surface of the vacuum breaking valve cover 31 and the vacuum breaking valve stem 33, and the vacuum breaking diaphragm 34 is fixedly arranged in the vacuum breaking valve cover 31 and connected to the vacuum breaking valve The rods 33 are in contact with each other, and the vacuum breaking diaphragm 34 is made of elastic material. A vacuum breaking pressure chamber 35 is formed between the vacuum breaking valve stem 33 and the vacuum breaking diaphragm 34, and a vacuum breaking atmosphere chamber 36 is formed between the vacuum breaking valve stem 33 and the vacuum breaking valve cover 31. A vacuum breaking air inlet interface 37 and a vacuum breaking exhaust interface 38 are provided on one side of the vacuum breaking valve cover 31. The vacuum breaking air inlet interface 37 is connected to the vacuum breaking pressure chamber 35, and the vacuum breaking exhaust interface 38 is connected to the vacuum breaking atmosphere chamber 36.

[0056] Reference Figure 7 By introducing gas into the vacuum breaking pressure chamber 35, the pressure in the vacuum breaking pressure chamber 35 is increased. When the pressure in the vacuum breaking pressure chamber 35 is higher than the pressure in the vacuum breaking atmosphere chamber 36, the vacuum breaking valve stem 33 and the vacuum breaking diaphragm 34 move upward under the action of the pressure difference, thereby realizing the circulation of airflow in the first vacuum breaking channel 161 and the second vacuum breaking channel 162; after stopping ventilation to the vacuum breaking pressure chamber 35, the vacuum breaking diaphragm valve 30 is in a closed state under the action of the vacuum breaking spring 32, and the vacuum breaking diaphragm 34 and the vacuum breaking valve stem 33 block the connection between the first vacuum breaking channel 161 and the second vacuum breaking channel 162, blocking the circulation of airflow between the first vacuum breaking channel 161 and the second vacuum breaking channel 162, thereby increasing the pressure in the lithium battery.

[0057] Reference Figure 6 and Figure 7 , a first vacuum breaking air duct 17, a second vacuum breaking air duct 171 and a vacuum breaking connecting channel 18 are provided in the mounting frame 10, the first air duct 13 is connected to the first vacuum breaking channel 161, under the action of the control component 70, the gas in the first vacuum breaking air duct 17 flows into the second vacuum breaking air duct 171, the second vacuum breaking air duct 171 is connected to the vacuum breaking connecting channel 18, and a vacuum breaking gas supply pipe 39 is provided above the vacuum breaking connecting channel 18, one end of the vacuum breaking gas supply pipe 39 is connected to the vacuum breaking connecting channel 18, and the other end of the vacuum breaking gas supply pipe 39 is connected to the vacuum breaking air inlet interface 37, and the gas passes through the first air duct 13, the first vacuum breaking air duct 17, the second vacuum breaking air duct 171, the vacuum breaking connecting channel 18, the vacuum breaking gas supply pipe 39 and the vacuum breaking air inlet interface 37 in turn to enter the vacuum breaking pressure chamber 35, thereby realizing the change of pressure in the vacuum breaking pressure chamber 35, thereby realizing the switching of the vacuum breaking diaphragm valve 30.

[0058] Reference Figure 6 The control component 70 includes a vacuum breaking pilot valve 72, and the vacuum breaking pilot valve 72 includes a vacuum breaking control block 721 and a vacuum breaking limit rod 722. The vacuum breaking control block 721 is slidingly connected to the vacuum breaking limit rod 722, and the vacuum breaking control block 721 can move up and down along the Z-axis direction. A vacuum breaking ventilation groove is provided on the mounting frame 10, and the vacuum breaking ventilation groove is adapted to the size and shape of the vacuum breaking control block 721. When the vacuum breaking control block 721 moves downward, the vacuum breaking control block 721 blocks the flow of gas between the first vacuum breaking vent 17 and the second vacuum breaking vent 171. When the vacuum breaking control block 721 moves upward, gas flow is realized between the first vacuum breaking vent 17 and the second vacuum breaking vent 171.

[0059] Reference Figure 8 and Figure 9 The electric proportional valve 40 includes a main valve body 41, a bottom cover 42 arranged at the bottom end of the main valve body 41, an intermediate valve body 43 arranged at the top end of the main valve body 41, a pilot seat 44 arranged on the intermediate valve body 43, and a control box 45 covered on the pilot seat 44. The main valve body 41 is provided with an air inlet 411, an air outlet 412 and an exhaust port 413. A transparent window 451 is provided on one side of the control box 45, and a display panel is provided on the transparent window 451. A control button 452 is provided on the upper side of the control box 45, and the pressure of the gas output is adjusted by the control button 452.

[0060] Reference Figure 9 and Figure 10 A first diaphragm 46 is pressed between the intermediate valve body 43 and the pilot seat 44. A first valve stem 47 is fixedly provided on the first diaphragm 46. A first valve core 48 and a second valve core 49 are provided on the first valve stem 47. The first valve core 48 is used to block the air inlet 411, and the second valve core 49 is used to block the exhaust port 413. An upper cavity 441 is formed between the first diaphragm 46 and the pilot seat 44, and a lower cavity 442 is formed between the first diaphragm 46 and the intermediate valve body 43. By filling the upper cavity 441 with gas, the lower cavity 442 is formed. The first valve stem 47 drives the first valve core 48 and the second valve core 49 to move, the first valve core 48 opens the passage between the air inlet 411 and the air outlet 412, and the second valve core 49 blocks the exhaust port 413, so that the airflow flows through the air inlet 411 to the air outlet 412; by changing the amount of gas filled in the upper chamber 441 to change the pressure in the upper chamber 441, the position of the first valve core 48 is changed, and the flow rate of the airflow from the air inlet 411 to the air outlet 412 is changed.

[0061] Reference Figure 2 and Figure 8A first air inlet interface 64 is provided on one side of the air inlet 411, a first air outlet interface 65 is provided on one side of the air outlet 412, a first air vent pipe 66 is provided between the first air vent channel 13 and the first air inlet interface 64, and a second air vent pipe 67 is provided between the first air outlet interface 65 and the vacuum proportional valve 50. The gas enters the vacuum proportional valve 50 through the first air vent channel 13, the first air vent pipe 66, the first air inlet interface 64, the first air outlet interface 65 and the second air vent pipe 67 in sequence, and the flow rate of the airflow flowing into the vacuum proportional valve 50 is controlled by the electric proportional valve 40.

[0062] Reference Figure 8 、 Figure 9 and Figure 11 The vacuum proportional valve 50 includes a main valve seat 51 and a guide seat 52 arranged on the main valve seat 51. A vacuum air inlet 511 is opened at one end of the main valve seat 51, and a vacuum air outlet 512 is opened on one side of the main valve seat 51. A second diaphragm 53 is arranged between the main valve seat 51 and the guide seat 52. A second valve stem 54 is fixedly arranged below the second diaphragm 53. A third valve core 55 is arranged on the second valve stem 54. The third valve core 55 is used to control the flow rate of the airflow flowing from the vacuum air inlet 511 to the vacuum air outlet 512.

[0063] Reference Figure 8 、 Figure 9 and Figure 11 A mounting seat 56 is slidingly provided in the guide seat 52, and a first spring 57 is provided between the top of the mounting seat 56 and the upper surface of the guide seat 52. The bottom end of the mounting seat 56 abuts against the second diaphragm 53, and a vacuum atmosphere chamber 58 is formed between the second diaphragm 53 and the mounting seat 56. A ventilation chamber 59 is formed between the mounting seat 56 and the top of the guide seat 52, and air flows into the ventilation chamber 59 through the second ventilation pipe 67; by introducing gas into the ventilation chamber 59 to increase the pressure in the ventilation chamber 59, when the pressure is greater than the pressure in the vacuum atmosphere chamber 58, the second valve stem 54 drives the third valve core 55 to move downward to change the flow rate of the air flow from the vacuum inlet 511 to the vacuum outlet 512; after the ventilation stops, under the elastic action of the first spring 57, the third valve core 55 moves upward to block the air flow channel between the vacuum inlet 511 and the vacuum outlet 512.

[0064] Reference Figure 2A pressure sensor 80 is also provided on the mounting frame 10. The pressure sensor 80 is used to detect the pressure in the lithium battery and transmit the negative pressure value signal to the external controller to control the electric proportional valve 40 and the vacuum proportional valve 50 to change the flow rate of the airflow in the exhaust channel 12; a cover body 11 is provided on the mounting frame 10, and the cover body 11 covers the pressure-maintaining diaphragm valve 20, the vacuum-breaking diaphragm valve 30, the vacuum proportional valve 50 and the electric proportional valve 40 to protect the pressure-maintaining diaphragm valve 20, the vacuum-breaking diaphragm valve 30, the vacuum proportional valve 50 and the electric proportional valve 40.

[0065] Reference Figure 2 A mounting block 90 is also provided on the mounting frame 10, and a plurality of mounting holes 91 are opened on the mounting block 90. The wires of the pressure maintaining pilot valve 71, the vacuum breaking pilot valve 72, the vacuum proportional valve 50 and the electric proportional valve 40 all pass through the mounting holes 91 to facilitate the storage and arrangement of the wires.

[0066] The implementation principle of a vacuum air control system in the embodiment of the present application is as follows: by controlling the flow of gas in the electric proportional valve 40, the pressure in the ventilation chamber 59 of the vacuum proportional valve 50 is controlled, thereby controlling the flow of gas in the vacuum proportional valve 50. The electric proportional valve 40, the vacuum proportional valve 50 and the pressure sensor 80 are used in conjunction to monitor the pressure in the lithium battery in real time and accurately regulate the pressure in the lithium battery. The control component 70 controls the opening and closing of the pressure-maintaining diaphragm valve 20 and the vacuum-breaking diaphragm valve 30. The pressure-maintaining diaphragm valve 20 and the vacuum-breaking diaphragm valve 30 are opened and closed. 0 is opened and the vacuum-breaking diaphragm valve 30 is closed, negative pressure is applied to the lithium battery through the exhaust channel 12; when the pressure-maintaining diaphragm valve 20 is closed and the vacuum-breaking diaphragm valve 30 is closed, the gas in the exhaust channel 12 stops circulating, thereby maintaining the pressure of the lithium battery; when the pressure-maintaining diaphragm valve 20 is closed and the vacuum-breaking diaphragm valve 30 is opened, the vacuum-breaking channel 16 is opened, and the gas enters the lithium battery through the vacuum-breaking channel 16, thereby increasing the pressure of the lithium battery; through the combination of various valve bodies, multiple functions are integrated into one, thereby achieving negative pressure, pressure maintenance and pressure increase of the lithium battery.

[0067] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A vacuum air control system, characterized in that: include: The mounting frame (10) is provided with a first ventilation channel (13), a pressure-maintaining connection channel (15), a vacuum-breaking connection channel (18), a vacuum-breaking channel (16) and an exhaust channel (12); the first ventilation channel (13) is connected to the pressure-maintaining connection channel (15) and the vacuum-breaking connection channel (18); one end of the first ventilation channel (13) is connected to a positive pressure interface (60); one end of the vacuum-breaking connection channel (18) is connected to an atmospheric interface (61); a vacuum source interface (63) is provided on one side of the exhaust channel (12); the other ends of the vacuum-breaking channel (16) and the exhaust channel (12) are connected to a lithium battery interface group (62); and the lithium battery interface group (62) is connected to a lithium battery; a pressure-maintaining diaphragm valve (20), arranged on the mounting frame (10) and located at the air extraction channel (12), the pressure-maintaining diaphragm valve (20) being used to control the on / off of the air flow in the air extraction channel (12); a vacuum breaking diaphragm valve (30) provided on the mounting frame (10) and located at the vacuum breaking channel (16); the vacuum breaking diaphragm valve (30) is used to control the on / off of the airflow in the vacuum breaking channel (16); a control assembly (70), arranged on the mounting frame (10), for controlling the opening and closing of the pressure-maintaining diaphragm valve (20) and the vacuum-breaking diaphragm valve (30); A pressure sensor (80) is provided on the mounting frame (10) and is used to detect the pressure inside the lithium battery; The control assembly (70) includes a pressure-maintaining pilot valve (71), and the pressure-maintaining pilot valve (71) includes a pressure-maintaining control block (711) and a pressure-maintaining limit rod (712). The pressure-maintaining control block (711) is slidably connected to the pressure-maintaining limit rod (712). A pressure-maintaining vent groove is provided between the pressure-maintaining control block (711) and the mounting frame (10). The pressure-maintaining control block (711) is adapted to the pressure-maintaining vent groove. The first vent channel (13) and the pressure-maintaining connecting channel (15) are connected via the pressure-maintaining vent groove. The pressure-maintaining control block (711) moves along the Z-axis direction to control the on / off between the first vent channel (13) and the pressure-maintaining connecting channel (15). The control assembly (70) includes a vacuum breaking pilot valve (72), and the vacuum breaking pilot valve (72) includes a vacuum breaking control block (721) and a vacuum breaking limit rod (722). The vacuum breaking control block (721) is slidably connected to the vacuum breaking limit rod (722). A vacuum breaking vent groove is provided between the vacuum breaking control block (721) and the mounting frame (10). The vacuum breaking control block (721) is adapted to the vacuum breaking vent groove. The first vent channel (13) and the vacuum breaking connecting channel (18) are connected through the vacuum breaking vent groove. The vacuum breaking control block (721) moves along the Z-axis direction to control the on-off between the first vent channel (13) and the vacuum breaking connecting channel (18). The first ventilation channel (13) is provided with a first vacuum breaking ventilation channel (17) in the direction of the vacuum breaking control block (721), and the vacuum breaking connection channel (18) is provided with a second vacuum breaking ventilation channel (171) in the direction of the vacuum breaking control block. The first vacuum breaking ventilation channel (17) and the second vacuum breaking ventilation channel (171) are connected through the vacuum breaking ventilation groove.

2. The vacuum air control system according to claim 1, characterized in that: The first vent channel (13) is provided with a first pressure-maintaining vent channel (14) toward the pressure-maintaining control block (711), and the pressure-maintaining connecting channel (15) is provided with a second pressure-maintaining vent channel (141) toward the pressure-maintaining control block (711), and the first pressure-maintaining vent channel (14) and the second pressure-maintaining vent channel (141) are connected through the pressure-maintaining vent groove.

3. The vacuum air control system according to claim 1, characterized in that: The pressure-maintaining diaphragm valve (20) includes a pressure-maintaining valve cover (21), a pressure-maintaining spring (22), a pressure-maintaining valve stem (23) and a pressure-maintaining diaphragm (24); the pressure-maintaining valve cover (21) is connected to the mounting frame (10); one end of the pressure-maintaining spring (22) is connected to the pressure-maintaining valve cover (21); the other end of the pressure-maintaining spring (22) is connected to the pressure-maintaining valve stem (23); the pressure-maintaining valve stem (23) and the pressure-maintaining diaphragm (24) are connected; a pressure-maintaining atmospheric chamber (26) is formed between the pressure-maintaining valve stem (23) and the pressure-maintaining valve cover (21); a pressure-maintaining pressure chamber (25) is formed between the pressure-maintaining valve stem (23) and the pressure-maintaining diaphragm (24); and the pressure-maintaining pressure chamber (25) is communicated with the pressure-maintaining connecting channel (15).

4. The vacuum air control system according to claim 1, characterized in that: The vacuum breaking diaphragm valve (30) includes a vacuum breaking valve cover (31), a vacuum breaking spring (32), a vacuum breaking valve stem (33) and a vacuum breaking diaphragm (34). The vacuum breaking valve cover (31) is connected to the mounting frame (10), one end of the vacuum breaking spring (32) is connected to the vacuum breaking valve cover (31), the other end of the vacuum breaking spring (32) is connected to the vacuum breaking valve stem (33), the vacuum breaking valve stem (33) and the vacuum breaking diaphragm (34) are connected, a vacuum breaking atmospheric chamber (36) is formed between the vacuum breaking valve stem (33) and the vacuum breaking valve cover (31), a vacuum breaking pressure chamber (35) is formed between the vacuum breaking valve stem (33) and the vacuum breaking diaphragm (34), and the vacuum breaking pressure chamber (35) is communicated with the vacuum breaking connecting channel (18).

5. The vacuum air control system according to claim 1, characterized in that: The first ventilation channel (13) is connected to a first ventilation pipe (66), and a vacuum proportional valve (50) is provided on one side of the first ventilation pipe (66). The first ventilation pipe (66) is used to ventilate the vacuum proportional valve (50). The vacuum proportional valve (50) is provided between the exhaust channel (12) and the vacuum source interface (63). The vacuum proportional valve (50) is used to adjust the air flow in the exhaust channel (12).

6. The vacuum air control system according to claim 5, characterized in that: An electric proportional valve (40) is provided between the vacuum proportional valve (50) and the first vent pipe (66), and a second vent pipe (67) is provided between the electric proportional valve (40) and the vacuum proportional valve (50). The first vent pipe (66) is connected to the vacuum proportional valve (50) through the electric proportional valve (40) and the second vent pipe (67) in sequence. The electric proportional valve (40) is used to control the flow rate of the airflow in the vacuum proportional valve (50).

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