Negative pressure control box for battery formation

Abstract

The utility model discloses a battery formation negative pressure control box which comprises an installation base and a plurality of control valves, each control valve comprises a driver, a valve core and a valve body, the valve body is installed on the installation base, a containing cavity is formed in the valve body and communicated with a first air port and a second air port, an air cavity is formed in the valve core, and the first air port is communicated with the second air port. The air cavity is communicated with a first air hole and a second air hole, the first air hole is communicated with the first air port, the driver is in driving connection with the valve element, and the valve element is rotatably arranged in the containing cavity, so that the valve element covers the second air port or the second air hole is communicated with the second air port; a plurality of gas flow channels are formed in the mounting base, and the first gas port and the second gas port of each control valve communicate with the different gas flow channels correspondingly. According to the technical scheme, the gas flow channel is integrated on the mounting base, so that the use of external pipelines is reduced, and the mounting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery formation, and particularly relates to a negative pressure control box for battery formation. Background Art

[0002] From the production of lithium-ion batteries to finished batteries, there is an important activation process in the middle, namely the formation process. During the formation process, a lot of chemical reactions will occur to generate electrolyte. During this process, it is necessary to timely discharge the electrolyte generated during battery formation. At present, a negative pressure control box for battery formation is used to connect to the liquid injection port of the battery through a suction nozzle to evacuate or break the vacuum, so as to extract or put back the electrolyte.

[0003] Existing negative pressure control boxes for battery formation generally install various control valves. There are some disadvantages in existing negative pressure control boxes for battery formation. First, due to the large number of control valves, a large number of external pipelines are required to connect between the control valves. The external pipelines need to bypass each valve body to be connected in place. In this way, the assembly process of the negative pressure control box for battery formation is cumbersome and the assembly efficiency is low. Second, generally, the whole control valve adopts electronic components, resulting in a large overall cost. Summary of the Utility Model

[0004] The main purpose of the utility model is to propose a negative pressure control box for battery formation, aiming to solve the problems of cumbersome assembly process, low assembly efficiency and high cost of the negative pressure control box for battery formation.

[0005] To achieve the above object, the negative pressure control box for battery formation proposed by the utility model includes:

[0006] An installation base;

[0007] A plurality of control valves, the control valve includes a driver, a valve core and a valve body. The valve body is installed on the installation base. An accommodation cavity is provided inside the valve body. The accommodation cavity communicates with a first air port and a second air port. An air cavity is provided inside the valve core. The air cavity communicates with a first air hole and a second air hole. The first air hole communicates with the first air port. The driver is drivingly connected to the valve core. The valve core is rotatably arranged in the accommodation cavity, so that the valve core covers the second air port or the second air hole communicates with the second air port;

[0008] A plurality of gas flow channels are formed inside the installation base. The first air port and the second air port of each control valve are respectively communicated with different gas flow channels. The control valve is used to control the on-off of the first air port and the second air port;

[0009] The valve body and the installation base are made of injection molding materials.

[0010] Furthermore, the plurality of gas flow channels are respectively a first flow channel, a second flow channel, a third flow channel, and a fourth flow channel, the plurality of control valves are respectively a positive pressure control valve, a negative pressure control valve, and a regulating valve, the first flow channel is connected to a positive pressure outlet and a regulating inlet, the second flow channel is connected to a positive pressure inlet and a regulating outlet, the third flow channel is connected to a negative pressure outlet, and the fourth flow channel is connected to a negative pressure inlet;

[0011] The first air port and the second air port of the positive pressure control valve are connected to the positive pressure inlet and the positive pressure outlet respectively, the first air port and the second air port of the negative pressure control valve are connected to the negative pressure inlet and the negative pressure outlet respectively, and the first air port and the second air port of the regulating valve are connected to the regulating inlet and the regulating outlet respectively;

[0012] The second flow channel is provided with a first plugging port between the positive pressure inlet and the regulating outlet for inserting a plug, the first flow channel is connected to a first external port between the positive pressure outlet and the regulating inlet, the third flow channel is connected to a second external port, and the first external port and the second external port are connected via an external pipeline;

[0013] Both ports of the first flow channel are closed, both ports of the second flow channel are respectively provided with a positive pressure source interface and a vacuum interface, both ports of the third flow channel are closed, one port of the fourth flow channel is provided with a negative pressure source interface, and the other port is closed.

[0014] Furthermore, a circuit board is provided on the mounting base, the circuit board is connected to the driver signal, the second flow channel is connected to a positive pressure gauge interface between the regulating outlet and the vacuum interface, the positive pressure measuring interface is connected to a positive pressure digital display, and the positive pressure digital display is connected to the circuit board signal.

[0015] Furthermore, the plurality of control valves further include a pressure measuring control valve, the third flow channel is further connected to a pressure measuring inlet, the fourth flow channel is further connected to a pressure measuring outlet and a negative pressure gauge interface, the first air port and the second air port of the pressure measuring control valve are respectively connected to the pressure measuring inlet and the pressure measuring outlet, and the negative pressure gauge interface is connected to a negative pressure digital display;

[0016] The third flow channel is provided with a second plugging port between the negative pressure outlet and the second external interface, and the fourth flow channel is provided with a third plugging port between the negative pressure inlet and the pressure measuring outlet, and the second plugging port and the third plugging port are both used to insert a plug;

[0017] The second flow channel is connected to a third external interface between the positive pressure gauge interface and the vacuum interface, and the third flow channel is connected to a fourth external interface on the side of the pressure measuring inlet away from the second external interface. The third external interface and the fourth external interface are connected through an external pipeline.

[0018] Furthermore, the circuit board is connected to a display screen for displaying the magnitude of the air pressure value.

[0019] Furthermore, the control valve further includes a transmission block and a mounting bracket. The mounting bracket is used to fix the driver, one end of the transmission block is connected to the output shaft of the driver, and the other end is connected to the valve core.

[0020] Furthermore, the drivers of the positive pressure control valve, the negative pressure control valve, and the pressure measurement control valve all adopt motors. The motors are drivingly connected to the valve core to cause the valve core to switch back and forth between positions of opening or covering the second air port.

[0021] Furthermore, the driver of the regulating valve adopts a servo motor. The servo motor is drivingly connected to the valve core of the regulating valve to adjust the area of the second air port communicating with the second air hole of the valve core, so that the magnitude of the air pressure can be adjusted.

[0022] Compared with the prior art, the technical solution of the present utility model integrates the gas flow path onto the mounting base, and directly fixes and installs the control valve on the mounting base, reducing the use of external pipelines, simplifying the pipeline connection between multiple control valves, solving the problem that a large number of external pipelines are required for traditional external pipeline connections, improving the installation efficiency of the overall battery formation negative pressure control box. At the same time, the cooperation of the valve body and the valve core structure is used to control and switch the magnitude of the air pressure, reducing the use of electronic components. The valve body and the mounting base are made of injection molding materials instead of machining materials, reducing the cost of producing the control valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the battery formation negative pressure control box of the present utility model;

[0024] Figure 2 is a schematic structural diagram of another perspective of the battery formation negative pressure control box of the present utility model;

[0025] Figure 3 is a cross-sectional view of the mounting base of the battery formation negative pressure control box of the present utility model;

[0026] Figure 4 is a schematic structural diagram of the control valve of the battery formation negative pressure control box of the present utility model;

[0027] Figure 5 is a schematic structural diagram of another perspective of the control valve of the battery formation negative pressure control box of the present utility model;

[0028] Figure 6 is an exploded view of the battery formation negative pressure control box of the present utility model;

[0029] Figure 7This is an exploded view of another perspective of the battery formation negative pressure control box of the present utility model;

[0030] Figure 8 This is a schematic structural diagram of the valve body of the battery formation negative pressure control box of the present utility model;

[0031] Explanation of the reference numerals in the attached drawings: 100, mounting base; 200, control valve; 210, valve core; 220, valve body; 223, accommodating cavity; 221, first air port; 222, second air port; 211, first air hole; 212, second air hole; 310, first flow channel; 320, second flow channel; 330, third flow channel; 340, fourth flow channel; 410, positive pressure control valve; 420, negative pressure control valve; 430, regulating valve; 412, positive pressure outlet; 431, regulating inlet; 411, positive pressure inlet; 432, regulating outlet; 421, negative pressure inlet; 422, negative pressure outlet; 510, first plugging port; 540, first external interface; 550, second external interface; 610, positive pressure source interface; 620, vacuum interface; 630, negative pressure source interface; 700, circuit board; 451, positive pressure gauge interface; 450, positive pressure digital display meter; 440, pressure measuring control valve; 441, pressure measuring inlet; 442, pressure measuring outlet; 461, negative pressure gauge interface; 460, negative pressure digital display meter; 520, second plugging port; 530, third plugging port; 560, third external interface; 570, fourth external interface; 800, display screen; 230, driver; 240, transmission block; 250, mounting bracket. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0033] Please refer to Figures 1 to 8 , the present utility model proposes a battery formation negative pressure control box.

[0034] The battery formation negative pressure control box includes an installation base 100 and a plurality of control valves 200. The control valve 200 includes a driver 230, a valve core 210, and a valve body 220. The valve body 220 is installed on the installation base 100. An accommodation cavity 223 is provided inside the valve body 220. The accommodation cavity 223 communicates with a first air port 221 and a second air port 222. An air cavity is provided inside the valve core 210. The air cavity communicates with a first air hole 211 and a second air hole 212. The first air hole 211 communicates with the first air port 221. The driver 230 is drivingly connected to the valve core 210. The valve core 210 is rotatably arranged in the accommodation cavity 223, so that the valve core 210 covers the second air port 222 or the second air hole 212 communicates with the second air port 222. A plurality of gas flow channels are formed inside the installation base 100. The first air port 221 and the second air port 222 of each control valve 200 are respectively communicated to different gas flow channels. The control valve 200 is used to control the on-off of the first air port 221 and the second air port 222. The valve body 220 and the installation base 100 are made of injection molding materials.

[0035] Specifically, during the installation process, the first air port 221 and the second air port 222 of the valve body 220 in the control valve 200 are aligned and communicated to the corresponding gas flow channels, and then the control valve 200 is installed on the installation base 100 using screws. During use, the valve core of the control valve 200 rotates. The first air hole 211 of the valve core 210 always communicates with the first air port 221. The valve core 210 can rotate back and forth between a position where the outer peripheral wall of the valve core 210 covers the second air port 222 and a position where the second air hole 212 communicates with the second air port 222. The control valve 200 can control the connection or disconnection between the first air port 221 and the second air port 222 to control the on-off of this passage. Since the valve core 210 has an air cavity communicating with the first air hole 211 and the second air hole 212, the valve core 210 is provided with a hollow structure. Since the valve bodies 220 and the installation bases 100 of the plurality of control valves 200 are both made of injection molding materials, and the remaining components can be assembled from existing parts, the valve bodies 220 and the installation bases 100 are selected to use injection molding materials instead of machining materials, resulting in a lower production cost and achieving a reduction in the cost of the entire battery formation negative pressure control box.

[0036] The technical solution of the present utility model integrates the gas flow channels onto the installation base 100 and directly fixes and installs the control valves 200 on the installation base 100, reducing the use of external pipelines, simplifying the pipeline connection between the plurality of control valves 200, solving the problem that a large number of external pipelines are required for traditional external pipelines, improving the installation efficiency of the overall battery formation negative pressure control box, and at the same time using the structural cooperation of the valve body 220 and the valve core 210 to achieve the control and switching of the air pressure, reducing the use of electronic components. The valve bodies 220 and the installation bases 100 are selected to use injection molding materials instead of machining materials, reducing the production cost of the control valves 200.

[0037] Please refer to Figures 1 to 8, Further, the multiple gas flow channels are respectively the first flow channel 310, the second flow channel 320, the third flow channel 330, and the fourth flow channel 340, and the multiple control valves 200 are respectively the positive pressure control valve 410, the negative pressure control valve 420, and the regulating valve 430. The first flow channel 310 is connected to a positive pressure outlet 412 and a regulating inlet 431, the second flow channel 320 is connected to a positive pressure inlet 411 and a regulating outlet 432, the third flow channel 330 is connected to a negative pressure outlet 422, and the fourth flow channel 340 is connected to a negative pressure inlet 421; the first air ports 221 and the second air ports 222 of the positive pressure control valve 410 are respectively connected to the positive pressure inlet 411 and the positive pressure outlet 412, the first air ports 221 and the second air ports 222 of the negative pressure control valve 420 are respectively connected to the negative pressure inlet 421 and the negative pressure outlet 422, and the first air ports 221 and the second air ports 222 of the regulating valve 430 are respectively connected to the regulating inlet 431 and the regulating outlet 432; a first plugging port 510 is provided between the positive pressure inlet 411 and the regulating outlet 432 of the second flow channel 320 for inserting a plug. The first flow channel 310 is connected to a first external interface 540 between the positive pressure outlet 412 and the regulating inlet 431, the third flow channel 330 is connected to a second external interface 550, and the first external interface 540 and the second external interface 550 are connected through an external pipeline. Both ends of the first flow channel 310 are closed, both ends of the second flow channel 320 are respectively provided with a positive pressure source interface 610 and a vacuum interface 620, both ends of the third flow channel 330 are closed, and one end of the fourth flow channel 340 is provided with a negative pressure source interface 630, and the other end is closed. Specifically, the positive pressure source interface 610 is used to connect to an external positive pressure source to provide positive pressure, the negative pressure source interface 630 is used to connect to an external negative pressure source to provide negative pressure, and the vacuum interface 620 is used to connect to a suction nozzle connected to the battery filling port in an external battery formation negative pressure system to extract and return the electrolyte inside the battery. When it is necessary to suck out the battery electrolyte, the positive pressure control valve 410 is closed, the negative pressure control valve 420 and the regulating valve 430 are opened, the external negative pressure source is started to generate negative pressure to start vacuum pumping, and the flow rate is adjusted through the regulating valve 430 to control the vacuum value. The gas flow path is: the fourth flow channel 340, the negative pressure inlet 421, the negative pressure control valve 420, the negative pressure outlet 422, the third flow channel 330, the second external interface 550, the external pipeline, the first external interface 540, the first flow channel 310, the regulating inlet 431, the regulating valve 430, the regulating outlet 432, the second flow channel 320, and the vacuum interface 620. When it is necessary to return the battery electrolyte to the battery filling port, the external positive pressure source is started to generate positive pressure to start breaking the vacuum, the negative pressure control valve 420 is closed, the positive pressure control valve 410 and the regulating valve 430 are opened, and at the same time, the air pressure can also be adjusted through the regulating valve 430 to make the electrolyte return to the battery filling port again.The gas flow path is as follows: the second flow channel 320, the positive pressure inlet 411, the positive pressure control valve 410, the positive pressure outlet 412, the first flow channel 310, the regulating inlet 431, the regulating valve 430, the regulating outlet 432, and the vacuum interface 620.

[0038] Please refer to Figures 1 to 8 , further, a circuit board 700 is provided on the mounting base 100. The circuit board 700 is signal-connected to the driver 230. A positive pressure gauge interface 451 is connected between the regulating outlet 432 and the vacuum interface 620 in the second flow channel 320. A positive pressure digital display 450 is connected to the positive pressure measuring interface. The positive pressure digital display 450 is signal-connected to the circuit board 700. The circuit board 700 controls the rotation of the valve core 210 of each control valve 200 by controlling the driver 230, thereby controlling the passage switch and the flow rate. The positive pressure digital display 450 can detect the air pressure when the positive pressure source is started, and then display the positive pressure value through the positive pressure digital display 450. The circuit board 700 controls the flow rate regulated by the regulating valve 430 according to the feedback air pressure, thereby controlling the air pressure. When it is necessary to return the battery electrolyte to the battery filling port, an external positive pressure source is started to generate positive pressure to break the vacuum. The negative pressure control valve 420 is closed, and the positive pressure control valve 410 and the regulating valve 430 are opened. At the same time, the air pressure can also be adjusted through the regulating valve 430 so that the electrolyte returns to the battery filling port again. The gas flow path is as follows: the second flow channel 320, the positive pressure inlet 411, the positive pressure control valve 410, the positive pressure outlet 412, the first flow channel 310, the regulating inlet 431, the regulating valve 430, the regulating outlet 432, the positive pressure gauge interface 451, and the vacuum interface 620.

[0039] Please refer to Figures 1 to 8, Further, the multiple control valves 200 further include a pressure measurement control valve 440. The third flow channel 330 is further connected to a pressure measurement inlet 441. The fourth flow channel 340 is further connected to a pressure measurement outlet 442 and a negative pressure gauge interface 461. The first air port 221 and the second air port 222 of the pressure measurement control valve 440 are respectively connected to the pressure measurement inlet 441 and the pressure measurement outlet 442. The negative pressure gauge interface 461 is connected to a negative pressure digital display 460. A second plug 520 is provided between the negative pressure outlet 422 and the second external interface 550 in the third flow channel 330. A third plug 530 is provided between the negative pressure inlet 421 and the pressure measurement outlet 442 in the fourth flow channel 340. Both the second plug 520 and the third plug 530 are used to insert plugs. A third external interface 560 is connected between the positive pressure gauge interface 451 and the vacuum interface 620 in the second flow channel 320. A fourth external interface 570 is connected to the side of the pressure measurement inlet 441 away from the second external interface 550 in the third flow channel 330. The third external interface 560 and the fourth external interface 570 are connected through an external pipeline. Specifically, when it is necessary to suck out the battery electrolyte, an external negative pressure source is started to generate negative pressure to start vacuum pumping. The electrolyte inside the battery is sucked out. The negative pressure control valve 420 is opened, the positive pressure control valve 410 is closed, the regulating valve 430 is opened, and the pressure measurement control valve 440 is opened to achieve negative pressure detection. The gas flow path is as follows: the fourth flow channel 340, the negative pressure inlet 421, the negative pressure control valve 420, the negative pressure outlet 422, the third flow channel 330, the second external interface 550, the external pipeline, the first external interface 540, the first flow channel 310, the regulating inlet 431, the regulating valve 430, the regulating outlet 432, the second flow channel 320, and then it is divided into two branches. The first branch flows to the third external interface 560, the external pipeline, the fourth external interface 570, the third flow channel 330, the pressure measurement inlet 441, the pressure measurement control valve 440, the pressure measurement outlet 442, the negative pressure gauge interface 461, and the negative pressure digital display 460. The second branch: directly flows to the vacuum interface 620.

[0040] Please refer to Figure 1 , Further, the circuit board 700 is connected to a display screen 800, and the display screen 800 is used to display the magnitude of the air pressure value. The display screen 800 can be set at the top for easy observation of the magnitude of the air pressure value by the user.

[0041] Please refer to Figures 4 to 7 , Further, the control valve 200 further includes a transmission block 240 and a mounting bracket 250. The mounting bracket 250 is used to fix the driver 230. One end of the transmission block 240 is connected to the output shaft of the driver 230, and the other end is connected to the valve core 210. The mounting bracket 250 plays a fixing role and can fix the driver 230. The output shaft of the driver 230 can drive the valve core 210 to change its position through the transmission block 240, thereby adjusting the opening or closing of the control valve 200 or adjusting the magnitude of the air pressure.

[0042] Further, the drivers 230 of the positive pressure control valve 410, the negative pressure control valve 420, and the pressure measurement control valve 440 all adopt motors. The motors are drivingly connected to the valve core 210, so that the valve core 210 can switch back and forth between the positions of opening or covering the second air port 222. In this way, the opening and closing of the positive pressure passage, the opening and closing of the negative pressure passage, and the opening and closing of the negative pressure digital display 460 for detecting the negative pressure are realized.

[0043] Further, the driver 230 of the regulating valve 430 adopts a servo motor. The servo motor is drivingly connected to the valve core 210 of the regulating valve 430 to adjust the area of the second air hole 212 where the second air port 222 communicates with the valve core 210, so that the air pressure can be adjusted. The servo motor can accurately control the angle and position of the valve core 210 of the regulating valve 430, and is very suitable for occasions that require high precision, high speed, and accurate position control. It is convenient to adjust the area of the second air hole 212 where the second air port 222 communicates with the valve core 210, adjust the air pressure, and improve the control accuracy of the air pressure adjustment.

[0044] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields shall be included in the patent protection scope of the present invention.

Claims

1. A negative pressure control box for battery formation, characterized in that, The battery formation negative pressure control box includes: An installation base; A plurality of control valves. The control valve includes a driver, a valve core, and a valve body. The valve body is installed on the installation base. An accommodation cavity is provided inside the valve body. The accommodation cavity communicates with a first air port and a second air port. An air cavity is provided inside the valve core. The air cavity communicates with a first air hole and a second air hole. The first air hole communicates with the first air port. The driver is drivingly connected to the valve core. The valve core is rotatably arranged in the accommodation cavity, so that the valve core covers the second air port or the second air hole communicates with the second air port; A plurality of gas flow channels are formed inside the installation base. The first air port and the second air port of each control valve are respectively communicated to different gas flow channels. The control valve is used to control the on-off of the first air port and the second air port.

2. The negative pressure control box for battery formation according to claim 1, characterized in that, The plurality of gas flow channels are respectively a first flow channel, a second flow channel, a third flow channel, and a fourth flow channel. The plurality of control valves are respectively a positive pressure control valve, a negative pressure control valve, and a regulating valve. The first flow channel communicates with a positive pressure outlet and a regulating inlet. The second flow channel communicates with a positive pressure inlet and a regulating outlet. The third flow channel communicates with a negative pressure outlet. The fourth flow channel communicates with a negative pressure inlet; The first air port and the second air port of the positive pressure control valve are respectively communicated with the positive pressure inlet and the positive pressure outlet. The first air port and the second air port of the negative pressure control valve are respectively communicated with the negative pressure inlet and the negative pressure outlet. The first air port and the second air port of the regulating valve are respectively communicated with the regulating inlet and the regulating outlet; A first plug port is provided between the positive pressure inlet and the regulating outlet of the second flow channel for inserting a plug. A first external interface is communicated between the positive pressure outlet and the regulating inlet of the first flow channel. The third flow channel communicates with a second external interface. The first external interface and the second external interface are communicated through an external pipeline; Both ends of the first flow channel are closed. A positive pressure source interface and a vacuum interface are respectively provided at both ends of the second flow channel. Both ends of the third flow channel are closed. A negative pressure source interface is provided at one end of the fourth flow channel, and the other end is closed.

3. The negative pressure control box for battery formation according to claim 2, characterized in that A circuit board is provided on the installation base. The circuit board is signal-connected to the driver. A positive pressure gauge interface is communicated between the regulating outlet and the vacuum interface of the second flow channel. The positive pressure gauge interface is communicated with a positive pressure digital display meter. The positive pressure digital display meter is signal-connected to the circuit board.

4. The negative pressure control box for battery formation according to claim 3, characterized in that, The plurality of control valves further include a pressure measurement control valve. The third flow channel further communicates with a pressure measurement inlet. The fourth flow channel further communicates with a pressure measurement outlet and a negative pressure gauge interface. The first air port and the second air port of the pressure measurement control valve are respectively communicated with the pressure measurement inlet and the pressure measurement outlet. The negative pressure gauge interface is communicated with a negative pressure digital display meter; A second plug port is provided between the negative pressure outlet and the second external interface of the third flow channel. A third plug port is provided between the negative pressure inlet and the pressure measurement outlet of the fourth flow channel. Both the second plug port and the third plug port are used for inserting plugs; A third external interface is connected between the positive pressure gauge interface and the vacuum interface of the second flow channel. A fourth external interface is connected to the pressure measurement inlet on a side away from the second external interface of the third flow channel. The third external interface and the fourth external interface are connected through an external pipeline.

5. The battery formation negative pressure control box according to claim 4, wherein, The circuit board is connected with a display screen for displaying the magnitude of the air pressure value.

6. The negative pressure control box for battery formation according to claim 1, characterized in that, The control valve further includes a transmission block and a mounting bracket for fixing the driver. One end of the transmission block is connected to the output shaft of the driver, and the other end is connected to the valve core.

7. The negative pressure control box for battery formation according to claim 4, wherein, The drivers of the positive pressure control valve, the negative pressure control valve, and the pressure measurement control valve all adopt motors. The motors are drivingly connected to the valve cores to cause the valve cores to switch back and forth between positions of opening or covering the second air ports.

8. The negative pressure control box for battery formation according to claim 7, characterized in that, The driver of the regulating valve adopts a servo motor. The servo motor is drivingly connected to the valve core of the regulating valve to adjust the area of the second air port communicating with the second air hole of the valve core, so that the air pressure magnitude can be adjusted.

Images