Electrolyte gas production detection device for sodium ion battery production

Abstract

The invention provides an electrolyte gas production detection device for sodium ion battery production, and relates to the technical field of sodium ion batteries. The device comprises a gas production assembly and a detection device, the gas production assembly comprises a three-way pipe, a gas production pipe and a driving unit, a first pipe, a second pipe and a third pipe are formed on the three-way pipe, and the first pipe communicates with a gas outlet and is provided with a first one-way valve capable of limiting gas from flowing to the gas outlet; the second pipe communicates with a gas inlet of the detection device and is provided with a second one-way valve capable of limiting gas from being away from the detection device, one end of the gas production pipe communicates with the third pipe, and the other end of the gas production pipe is connected with the driving unit; when the driving unit is in a gas production state, gas in the battery can enter the gas production pipe; when the driving unit is in the exhaust state, the driving unit can drive gas in the gas production pipe to enter the detection device, so that the detection device can detect the gas in the gas production pipe. The device has the advantages of being time-saving, labor-saving and high in detection efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of sodium ion batteries, and in particular to a device for detecting gas production in an electrolyte for use in sodium ion battery production. Background Art

[0002] Sodium-ion batteries and lithium-ion batteries have similar working principles and also have advantages such as low cost and long cycle life. In addition, sodium resources are abundant and have great potential in the field of large-scale energy storage. Electrolyte is an indispensable part of sodium-ion batteries. It carries the function of conducting sodium ions between the positive and negative electrodes. A good electrolyte also needs to meet the characteristics of low cost and wide electrochemical window. The electrolyte inside the sodium-ion battery will release gas during the first charge and discharge. In order to detect the operating status and performance of the sodium-ion battery electrolyte, the inspectors need to use the electrolyte gas production detection device to detect and process the gas released by the electrolyte.

[0003] Existing electrolyte gas production detection devices generally include a gas sampling pipe and an analysis device. The tester will first connect the mouth of the gas sampling pipe to the exhaust port of the sodium-ion battery to be tested so that the gas released by the battery can be collected in the gas sampling pipe. The mouth of the gas sampling pipe is then removed from the battery and connected to the analysis device so that the analysis device can analyze the gas composition in the gas sampling pipe.

[0004] However, when using the gas sampling tube for high-frequency testing, the tester needs to repeatedly disassemble and install the gas sampling tube between the analysis device and the battery, making the testing process of the electrolyte gas production detection device time-consuming, labor-intensive and inefficient.

[0005] In view of this, it is necessary to provide an electrolyte gas production detection device for sodium ion battery production. Summary of the Invention

[0006] In order to solve the problem that the detection process of existing electrolyte gas production detection devices is time-consuming, labor-intensive and inefficient, the present application provides an electrolyte gas production detection device for sodium ion battery production.

[0007] The present application provides an electrolyte gas production detection device for sodium ion battery production, which adopts the following technical solution: it includes a gas collection component and a detection device, the gas collection component includes a three-way pipe, a gas collection pipe and a drive unit, the three-way pipe is formed with a first pipe, a second pipe and a third pipe, the first pipe is connected to the gas outlet, and a first one-way valve is provided in the first pipe, the first one-way valve can limit the gas from passing through the first one-way valve to flow to the gas outlet, the second pipe is connected to the gas inlet of the detection device, and a second one-way valve is provided in the second pipe, the second one-way valve can limit the gas from passing through the second one-way valve to leave the detection device, one end of the gas collection pipe is connected to the third pipe, and the other end of the gas collection pipe is connected to the drive unit; When the driving unit is in a gas collection state, the gas in the battery can sequentially pass through the gas outlet, the first tube, and the third tube and enter the gas collection tube; When the driving unit is in the exhaust state, the driving unit can drive the gas in the gas sampling pipe to pass through the third pipe and the second pipe in sequence and enter the detection device, so that the detection device can detect the gas in the gas sampling pipe.

[0008] By adopting the above technical solution, when it is necessary to detect the gas released by a battery, the user only needs to connect the first tube with the gas outlet of the battery first, and then adjust the drive unit to the gas collection state, so that the gas in the battery can pass through the gas outlet, the first tube and the third tube in sequence into the gas collection tube, and then adjust the drive unit to the exhaust state, so that the drive unit can drive the gas in the gas collection tube to pass through the third tube and the second tube in sequence into the detection device, so that the gas released by the battery can be detected by the detection device; then the user only needs to connect the first tube with the gas outlet of the next battery to realize the detection of the next battery, so that the electrolyte gas production detection device for sodium ion battery production is more time-saving and labor-saving than the detection process in the prior art where the detection personnel need to repeatedly disassemble and assemble the gas collection tube between the analysis device and the battery, and has better detection efficiency.

[0009] Specifically, the driving unit includes a mounting shell, a driving piston, a driving member, a driven piston and a driven one-way valve. An air storage chamber is formed inside the mounting shell, a connecting hole leading to the air storage chamber is opened at one end of the mounting shell, the air collection pipe is connected to the connecting hole, the driving piston is arranged in the air storage chamber, the driving member is connected to the driving piston in a transmission manner and can drive the driving piston to approach or move away from the connecting hole, the driven piston is arranged in the air collection pipe and abuts against the inner wall of the air collection pipe, and the driven piston is moved along the length of the air collection pipe. A vent hole is opened in the direction of the driving piston, the driven one-way valve is arranged in the vent hole and can limit the gas from passing through the driven one-way valve away from the gas storage chamber, and the driven one-way valve is arranged to allow the gas to pass through the vent hole and approach the gas storage chamber when the pressure difference between the two sides of the driven piston is not less than the maximum static friction between the driven piston and the wall of the gas collection pipe, a gas collection protrusion is provided on the hole wall of the connecting hole, when the driving piston is away from the connecting hole, the driving unit is in a gas collection state, and the gas collection protrusion can abut against the side of the driven piston facing the connecting hole; An exhaust protrusion is provided on the inner wall of the third tube. When the driving piston approaches the communicating hole, the driving unit is in an exhaust state, and the exhaust protrusion can abut against a side of the driven piston facing away from the communicating hole.

[0010] By adopting the above technical solution, the drive unit realizes the gas collection and exhaust functions by driving the piston, cooperating with the driven piston and the driven one-way valve. When the driving piston is away from the connecting hole, the driven piston will first slide to a position where it contacts the gas collection protrusion under the pressure difference on both sides of the piston, and then the excess gas in the gas collection pipe will pass through the driven one-way valve and enter the gas storage chamber. When the driving piston approaches the connecting hole, the driven piston will first slide to a position where it contacts the exhaust protrusion under the pressure difference on both sides of the piston, and then all the gas in the gas collection pipe will be sent to the detection device.

[0011] Furthermore, the driving unit further comprises a partition plate, which is arranged in the installation shell and divides the interior of the installation shell into the air storage chamber and the installation chamber; The driving member includes a motor, a driving gear, a driven gear and a driven rod. The motor is arranged on the cavity wall of the installation cavity, and the driving gear is arranged on the output shaft of the motor. The driven gear is rotatably connected to the cavity wall of the installation cavity and meshes with the driving gear, and a driving screw hole is provided on the rotating shaft of the driven gear along the moving direction of the driving piston. The rod body of the driven rod is provided with an external thread that matches the driving screw hole. One end of the driven rod passes through the through hole opened on the inner wall of the air storage cavity and is connected to the side of the driving piston away from the communicating hole. The other end of the driven rod is inserted into the driving screw hole and is threadedly connected to the driven gear. The cavity wall of the air storage cavity can abut against the driving piston and limit the driving piston from rotating around the central axis of the driven rod.

[0012] By adopting the above technical solution, the user can control the motor to drive the driving gear to rotate, and then drive the driven gear to rotate through the driving gear. When the driven gear rotates, it will drive the driven rod and the driving piston to move in the air storage chamber through the driving screw hole, thereby realizing the air collection and exhaust operations.

[0013] Furthermore, the driving member also includes an elastic member, and a threaded section and a flat section are sequentially formed in the driving screw hole along its own length direction, and the flat section is located between the threaded section and the driving piston. When the driving piston abuts against the side cavity wall of the air storage chamber where the communicating hole is opened, the driven rod is separated from the threaded section. The elastic member is arranged between the end of the driven rod away from the driving piston and the hole wall of the driving screw hole, and can apply a force to the driven rod away from the communicating hole.

[0014] By adopting the above technical solution, in the exhaust state, when the driving piston moves to a position abutting the side wall of the air storage chamber where the connecting hole is provided, the driven rod will move to the flat section and separate from the threaded section, so that the driven gear cannot drive the driven rod to continue to approach the connecting hole; and the elastic member can apply a force to the driven rod away from the connecting hole, so that in the next air extraction state, the driven rod can still be threadedly connected to the driven gear.

[0015] Furthermore, it also includes a base, the gas collection component is arranged on the base, the base is provided with a slide rail along the length direction of the gas collection pipe, the detection device is arranged on the slide rail and can move along the slide rail, the gas collection pipe and the third pipe, as well as the gas collection pipe and the connecting hole are all detachably connected.

[0016] By adopting the above technical solution, the user can control the distance between the third tube and the connecting hole by adjusting the position of the detection device, thereby enabling the electrolyte gas production detection device for sodium ion battery production to adapt to gas sampling pipes of different lengths.

[0017] Furthermore, it further comprises a telescopic cylinder, wherein the cylinder body of the telescopic cylinder is provided on the base, the piston rod of the telescopic cylinder is connected to the detection device, and the telescopic cylinder can drive the detection device to move the third tube toward or away from the communicating hole; A fixed nut is rotatably connected to the mounting shell, and a movable nut is rotatably connected to the body of the third tube. One end of the gas production pipe is provided with an external thread adapted to the movable nut and can be connected to the third tube by screwing with the movable nut. The other end of the gas production pipe is provided with an external thread adapted to the fixed nut, and the gas production pipe can be connected to the connecting hole by screwing with the fixed nut.

[0018] By adopting the above technical solution, the user can adjust the distance between the third tube and the connecting hole by controlling the extension and retraction of the piston rod of the telescopic cylinder; the user can also achieve a detachable connection between the gas production pipe and the third tube and the connecting hole by fixing the nut and moving the nut.

[0019] Furthermore, it also includes a controller and a pressure sensor, wherein the pressure sensor is arranged on the side of the driving piston close to the connecting hole and can detect the air pressure between the driving piston and the driven piston, and the pressure sensor is electrically connected to the controller and can feed back the detection result to the controller, and the controller is electrically connected to the motor and can control the switch of the motor according to the detection result.

[0020] By adopting the above technical solution, the pressure sensor can detect the air pressure between the driving piston and the driven piston in real time, and feed back the detection result to the controller. The controller determines whether the driven piston in the gas collection pipe is in a position abutting the exhaust protrusion based on the size of the result, and controls the switch of the motor accordingly, thereby realizing automatic control of the working state of the driving unit, making the detection process more intelligent and accurate.

[0021] Furthermore, a roller is provided at the bottom of the base.

[0022] By adopting the above technical solution, arranging rollers at the bottom of the base can facilitate the movement of the entire electrolyte gas production detection device for sodium ion battery production, and facilitate flexible adjustment of the device position to adapt to different detection needs.

[0023] Furthermore, the driving unit also includes an exhaust one-way valve, and an exhaust hole leading to the outside is opened on the inner wall of one side extending along the moving direction of the driving piston in the air storage chamber. The exhaust one-way valve is arranged in the exhaust hole and can limit the external gas from passing through the exhaust one-way valve into the air storage chamber, and the exhaust one-way valve is set to allow the gas to pass through the exhaust one-way valve and leave the air storage chamber when the pressure difference on both sides of the driven piston is less than the maximum static friction between the driven piston and the wall of the gas collection pipe. When the driving piston approaches the connecting hole and crosses the exhaust hole, the driving unit is in an exhaust state.

[0024] By adopting the above technical solution, the exhaust check valve is arranged in the exhaust hole leading to the outside world, which can not only prevent external gas from entering the gas storage chamber, but also allow gas to be discharged from the gas storage chamber through the exhaust hole when the pressure difference between the two sides of the driven piston is less than the maximum static friction between it and the wall of the gas sampling tube. Since the gas sample that first enters the gas sampling tube in the gas sampling state will mix with the original gas in the gas sampling tube and be contaminated, when the driven piston slides to a position abutting the gas sampling protrusion, the user can continue to control the driving piston to move away from the connecting hole and continue to cross the exhaust hole, so that the contaminated gas sample in the gas sampling tube passes through the driven check valve and enters the gas storage chamber, while the relatively pure gas sample enters the gas sampling tube subsequently; then the user can control the driving piston to move toward the connecting hole, at which time the gas in the gas storage chamber will first be discharged from the exhaust hole. After the driving piston crosses the exhaust hole, the driven piston will begin to approach the exhaust protrusion and put the driving unit into the exhaust state.

[0025] Furthermore, it also includes a purification device, the air inlet of the purification device is connected to the exhaust hole and can purify the gas discharged from the exhaust hole.

[0026] By adopting the above technical solution, the additional purification device can purify the gas discharged from the exhaust hole, avoiding environmental pollution caused by the emission of harmful gases.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. It includes a gas collection component and a detection device, the gas collection component includes a three-way pipe, a gas collection pipe and a driving unit, the three-way pipe is formed with a first pipe, a second pipe and a third pipe, the first pipe is connected to the gas outlet, and a first one-way valve is provided in the first pipe, the first one-way valve can limit the gas from passing through the first one-way valve to flow to the gas outlet, the second pipe is connected to the gas inlet of the detection device, and a second one-way valve is provided in the second pipe, the second one-way valve can limit the gas from passing through the second one-way valve to leave the detection device, one end of the gas collection pipe is connected to the third pipe, and the other end of the gas collection pipe is connected to the driving unit. When the driving unit is in a gas collection state, the gas in the battery can pass through the gas outlet, the first pipe and the third pipe in sequence and enter the gas collection pipe. When the driving unit is in an exhaust state, the driving unit can drive the gas in the gas collection pipe to pass through the third pipe and the second pipe in sequence and enter the detection device, so that the detection device can detect the gas in the gas collection pipe. The gas released by the battery can be detected by the user only needing to connect the first tube with the gas outlet of the battery first, and then adjust the driving unit to the gas collection state, so that the gas in the battery can pass through the gas outlet, the first tube and the third tube in sequence into the gas collection tube, and then adjust the driving unit to the exhaust state, so that the driving unit can drive the gas in the gas collection tube to pass through the third tube and the second tube in sequence into the detection device, so that the gas released by the battery can be detected by the detection device; then the user only needs to connect the first tube with the gas outlet of the next battery to realize the detection of the next battery, so that the electrolyte gas production detection device for sodium ion battery production is more time-saving and labor-saving than the detection process in the prior art in which the detection personnel need to repeatedly disassemble and assemble the gas collection tube between the analysis device and the battery, and has better detection efficiency; 2. The driving unit also includes an exhaust one-way valve. An exhaust hole leading to the outside is opened on the inner wall of one side of the gas storage chamber extending along the moving direction of the driving piston. The exhaust one-way valve is arranged in the exhaust hole and can limit the outside gas from passing through the exhaust one-way valve to enter the gas storage chamber. The exhaust one-way valve is set to allow the gas to pass through the exhaust one-way valve and leave the gas storage chamber when the pressure difference on both sides of the driven piston is less than the maximum static friction between the driven piston and the wall of the gas collection pipe. When the driving piston approaches the connecting hole and crosses the exhaust hole, the driving unit is in the exhaust state. Since the gas sample that first enters the gas collection pipe in the gas collection state will be mixed with the gas sample in the gas collection pipe The original gas in the gas storage chamber is mixed and contaminated. When the driven piston slides to the position abutting the gas sampling protrusion, the user can continue to control the driving piston to move away from the connecting hole and pass over the exhaust hole, so that the contaminated gas sample in the gas sampling tube passes through the driven one-way valve into the gas storage chamber, and the subsequent gas sample entering the gas sampling tube is a relatively pure gas sample; then the user can control the driving piston to move toward the connecting hole. At this time, the gas in the gas storage chamber will be discharged from the exhaust hole first. When the driving piston passes over the exhaust hole, the driven piston will start to approach the exhaust protrusion and put the driving unit into the exhaust state. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a three-dimensional diagram of an electrolyte gas production detection device for sodium ion battery production according to the present application; Figure 2 It is along Figure 1 A schematic cross-sectional view of the central gas collection pipe taken along its longitudinal axis; Figure 3 yes Figure 2 Schematic enlargement of area A, showing the slave piston.

[0029] Figure numerals: 1. Gas collection component; 11. First tube; 12. Second tube; 13. Third tube; 131. Exhaust protrusion; 1312. Moving nut; 14. Gas collection tube; 15. Driving unit; 151. Mounting shell; 1511. Gas collection protrusion; 1512. Fixing nut; 152. Driving piston; 153. Driving member; 1531. Motor; 1532. Driving gear; 1533. Driven gear; 1534. Driven rod; 1535. Elastic member; 1536. Flat section; 154. Driven piston; 155. Driven one-way valve; 156. Partition; 157. Exhaust one-way valve; 2. Detection device; 3. Base; 31. Slide rail; 32. Roller; 4. Telescopic cylinder; 5. Pressure sensor; 6. Purification device. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 For further explanation: See also Figure 1 and Figure 2A sodium-ion battery production electrolyte gas production detection device includes a base 3, a gas collection component 1, a detection device 2, a telescopic cylinder 4, a pressure sensor 5, a purification device 6 and a controller (not shown in the figure). The gas collection component 1 is arranged on the base 3, and a slide rail 31 is provided on the base 3 along the length direction of the gas collection pipe 14. The detection device 2 is arranged on the slide rail 31 and can move along the slide rail 31; the cylinder body of the telescopic cylinder 4 is arranged on the base 3, and the piston rod of the telescopic cylinder 4 is connected to the detection device 2 and can drive the detection device 2 to move along the slide rail 31; four rollers 32 are provided at the bottom of the base 3 to facilitate the user to move the present sodium-ion battery production electrolyte gas production detection device.

[0031] See also Figure 2 and Figure 3 The gas collection component 1 includes a three-way pipe, a gas collection pipe 14 and a driving unit 15. The three-way pipe is formed with a first pipe 11, a second pipe 12 and a third pipe 13. The driving unit 15 includes a mounting shell 151, a partition 156, a driving piston 152, a driving member 153, a driven piston 154, a driven one-way valve 155 and an exhaust one-way valve 157. The partition 156 is arranged in the mounting shell 151 and divides the interior of the mounting shell 151 into a gas storage chamber and a mounting chamber. A connecting hole leading to the gas storage chamber is opened at one end of the mounting shell 151 close to the detection device 2. A fixing nut 1512 is rotatably connected to the mounting shell 151, and a moving nut 1312 is rotatably connected to the body of the third pipe 13. One end of the gas collection pipe 14 is provided with an external thread adapted to the moving nut 1312 and can be screwed to the third pipe 1 via the moving nut 1312. 3 connection, the other end of the gas sampling pipe 14 is provided with an external thread adapted to the fixing nut 1512, and the gas sampling pipe 14 can be connected to the communicating hole by being screwed with the fixing nut 1512, so that the user can control the distance between the third tube 13 and the communicating hole by adjusting the position of the detection device 2, thereby enabling the electrolyte gas production detection device for sodium ion battery production to adapt to gas sampling pipes 14 of different lengths; the first tube 11 is used to communicate with the gas outlet of the battery to be detected and receive the gas released by the electrolyte in the battery during the first charge and discharge, and a first one-way valve is provided in the first tube 11, which can limit the gas from passing through the first one-way valve to flow toward the gas outlet, and the second tube 12 is connected to the air inlet of the detection device 2, and a second one-way valve is provided in the second tube 12, which can limit the gas from passing through the second one-way valve to leave the detection device 2.

[0032] See also Figure 2 and Figure 3The driving member 153 includes a motor 1531, a driving gear 1532, a driven gear 1533, a driven rod 1534 and an elastic member 1535. The motor 1531 is arranged on the cavity wall of the installation cavity, and the driving gear 1532 is arranged on the output shaft of the motor 1531 and meshes with the driven gear 1533; a rotating groove is provided on the cavity wall of the installation cavity, and a circle of annular groove is provided on the groove wall of the rotating groove. The rotating shaft of the driven gear 1533 is inserted into the rotating groove, and a circle of convex rings adapted to the annular groove is provided on the shaft body of the driven gear 1533. The convex ring is inserted in the annular groove and can abut against the groove wall of the annular groove to limit the axial movement of the driven gear 1533. A bearing is also provided between the outer ring surface of the convex ring and the groove wall of the annular groove, so that the driven gear 1533 is rotatably connected to the installation cavity through the bearing. A driving screw hole is provided on the cavity wall of the cavity and on the rotating shaft of the driven gear 1533 along the moving direction of the driving piston 152. A threaded section and a flat section 1536 are sequentially formed in the driving screw hole along its own length direction. The flat section 1536 is located between the threaded section and the driving piston 152. An external thread matching the threaded section is provided on the rod body of the driven rod 1534. One end of the driven rod 1534 passes through the through hole opened on the inner wall of the air storage cavity and is connected to the side of the driving piston 152 away from the connecting hole. The other end of the driven rod 1534 is inserted into the driving screw hole and screwed with the threaded section. The elastic member 1535 is provided between the end of the driven rod 1534 away from the driving piston 152 and the hole wall of the driving screw hole. The elastic member 1535 can be a tension spring so that the tension spring can apply a force to the driven rod 1534 away from the connecting hole.

[0033] See also Figure 2 and Figure 3 The slave piston 154 is arranged in the gas collection pipe 14 and abuts against the inner wall of the gas collection pipe 14. A vent hole is opened on the slave piston 154 along the length direction of the gas collection pipe 14. The slave check valve 155 is arranged in the vent hole and can limit the gas from passing through the slave check valve 155 away from the gas storage chamber. The slave check valve 155 is set so that the pressure difference on both sides of the slave piston 154 is not less than the maximum static friction between the slave piston 154 and the wall of the gas collection pipe 14 and the maximum static friction between the slave piston 154 and the wall of the connecting hole. When force is applied, gas is allowed to pass through the vent hole and approach the gas storage chamber. A gas collection protrusion 1511 is provided on the wall of the connecting hole. When the driving piston 152 is away from the connecting hole, the driving unit 15 is in a gas collection state, and the gas collection protrusion 1511 can abut against the side of the driven piston 154 facing the connecting hole; an exhaust protrusion 131 is provided on the inner wall of the third tube 13. When the driving piston 152 approaches the connecting hole, the driving unit 15 is in an exhaust state, and the exhaust protrusion 131 can abut against the side of the driven piston 154 facing away from the connecting hole.

[0034] See also Figure 2 and Figure 3, the cross section of the driving piston 152 can be set to a rectangle, so that the cavity wall of the air storage chamber can abut against the driving piston 152 and limit the driving piston 152 from rotating around the central axis of the driven rod 1534; the pressure sensor 5 is arranged on the side of the driving piston 152 close to the communicating hole and can detect the air pressure between the driving piston 152 and the driven piston 154, and the pressure sensor 5 is electrically connected to the controller and can feed back the detection result to the controller, and the controller is electrically connected to the motor 1531 and can control the switch of the motor 1531 according to the detection result; an exhaust hole leading to the outside is opened in the middle of the top wall of the air storage chamber, and an exhaust one-way valve 157 is arranged in the exhaust hole and can limit the external gas from passing through the exhaust one-way valve 157 into the air storage chamber, and the exhaust The gas one-way valve 157 is configured to allow gas to pass through the exhaust one-way valve 157 and leave the gas storage chamber when the pressure difference on both sides of the driven piston 154 is less than the maximum static friction between the driven piston 154 and the wall of the connecting hole; the purification device 6 is arranged on the top of the mounting shell 151, and the air inlet of the purification device 6 is connected to the exhaust hole. The purification device 6 can be an activated carbon adsorption device or a molecular sieve membrane, so that the purification device 6 can purify the gas discharged from the exhaust hole; specifically, the exhaust one-way valve 157 can be configured to use the weight of the valve core to achieve gas flow limitation in the direction from the inside of the gas storage chamber to the outside of the gas storage chamber, and the driven one-way valve 155 can be configured to use a compression spring to achieve gas flow limitation in the direction from the gas collection pipe 14 to the inside of the gas storage chamber.

[0035] The working process of the electrolyte gas production detection device for sodium ion battery production described in this application in the gas collection state is as follows: Since the gas sample that first enters the gas sampling tube 14 in the gas sampling state will be mixed with the original gas in the gas sampling tube 14 and be contaminated, when it is necessary to detect the gas released by a battery, the user only needs to connect the first tube 11 with the gas outlet of the battery, and then start the motor 1531 through the controller to rotate to drive the driving gear 1532 to rotate, and then drive the driven gear 1533 to rotate through the driving gear 1532, so that the driven rod 1534 and the driving piston 152 are driven away from the connecting hole through the driven gear 1533. The gas sample that first enters the gas sampling tube 14 will first push the driven piston 154 to the position abutting the gas sampling protrusion 1511, and then pass through the driven one-way valve 155 to enter the gas storage chamber. When the driven rod 1534 moves a preset distance away from the connecting hole, the controller will control the motor 1531 to stop rotating. At this time, the gas sampling tube 14 contains a relatively pure gas sample; the preset distance can be adjusted according to the selected length of the gas sampling tube 14 to ensure that after the gas sampling state ends, the gas sampling tube 14 contains a relatively pure gas sample.

[0036] The working process of the electrolyte gas production detection device for sodium ion battery production described in this application in the exhaust state is as follows: When entering the exhaust state, the controller will control the motor 1531 to rotate in the opposite direction to that in the gas collection state. At this time, since the maximum static friction between the driven piston 154 and the wall of the communicating hole is greater than the limiting force of the exhaust one-way valve 157 on the gas from the inside of the gas storage chamber to the outside of the gas storage chamber, the gas in the gas storage chamber will be discharged from the exhaust hole first. When the driving piston 152 passes over the exhaust hole, the driven piston 154 will begin to approach the exhaust protrusion 131 and sequentially pass the gas in the gas collection pipe 14 through the third tube 13 and the second tube 12 into the detection device 2; if the gas collection pipe 14 is shorter at this time, and the driving piston 152 has not moved to the position where it abuts the wall on one side of the gas storage chamber where the communicating hole is opened, the driven piston 154 has already abutted against the gas collection protrusion 1511 and stopped. When the driven piston 154 stops moving, the controller will know that the driven piston 154 has stopped moving and turn off the motor 1531 based on the pressure detected by the pressure sensor 5. If the gas collection pipe 14 is mistakenly selected as a longer model at this time, the driving piston 152 has moved to a position where it abuts against the side wall of the gas storage chamber where a connecting hole is opened, and the driven piston 154 has not yet abutted against the gas collection protrusion 1511, the driven rod 1534 will move to the flat section 1536 and separate from the threaded section, so that the driven gear 1533 cannot drive the driven rod 1534 to continue to approach the connecting hole, so that the controller can wait for a period of time to stop automatically, and the setting of the elastic member 1535 can ensure that the driven rod 1534 can still be threadedly connected with the driven gear 1533 in the next gas collection state.

[0037] The implementation principle of the electrolyte gas production detection device for sodium ion battery production described in this application is: When it is necessary to detect the gas released by a battery, the user only needs to connect the first tube 11 with the gas outlet of the battery first, and then adjust the drive unit 15 to the gas collection state, so that the gas in the battery can pass through the gas outlet, the first tube 11 and the third tube 13 in sequence into the gas collection tube 14, and then adjust the drive unit 15 to the exhaust state, so that the drive unit 15 can drive the gas in the gas collection tube 14 to pass through the third tube 13 and the second tube 12 in sequence into the detection device 2, so that the gas released by the battery can be detected by the detection device 2; then the user only needs to connect the first tube 11 with the gas outlet of the next battery to realize the detection of the next battery, so that the electrolyte gas production detection device for sodium ion battery production is more time-saving and labor-saving than the detection process in the prior art where the detection personnel need to repeatedly disassemble and assemble the gas collection tube 14 between the analysis device and the battery, and has better detection efficiency.

[0038] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A sodium ion battery production electrolyte gas production detection device for detecting gas discharged from the battery outlet, characterized by: The invention comprises a gas collection component (1) and a detection device (2), wherein the gas collection component (1) comprises a three-way pipe, a gas collection pipe (14) and a drive unit (15), wherein a first pipe (11), a second pipe (12) and a third pipe (13) are formed on the three-way pipe, wherein the first pipe (11) is connected to the gas outlet, and a first one-way valve is provided in the first pipe (11), and the first one-way valve can limit the gas from passing through the first one-way valve and flowing toward the gas outlet, wherein the second pipe (12) is connected to the gas inlet of the detection device (2), and a second one-way valve is provided in the second pipe (12), and the second one-way valve can limit the gas from passing through the second one-way valve and away from the detection device (2), wherein one end of the gas collection pipe (14) is connected to the third pipe (13), and the other end of the gas collection pipe (14) is connected to the drive unit (15); When the driving unit (15) is in a gas collection state, the gas in the battery can sequentially pass through the gas outlet, the first tube (11), and the third tube (13) and enter the gas collection tube (14); When the driving unit (15) is in the exhaust state, the driving unit (15) can drive the gas in the gas sampling pipe (14) to pass through the third pipe (13) and the second pipe (12) in sequence and enter the detection device (2), so that the detection device (2) can detect the gas in the gas sampling pipe (14).

2. The electrolyte gas generation detection device for sodium ion battery production according to claim 1, characterized in that: The driving unit (15) includes a mounting shell (151), a driving piston (152), a driving member (153), a driven piston (154) and a driven one-way valve (155). An air storage chamber is formed inside the mounting shell (151). A connecting hole leading to the air storage chamber is provided at one end of the mounting shell (151). The air sampling pipe (14) is connected to the connecting hole. The driving piston (152) is arranged in the air storage chamber. The driving member (153) is transmission-connected to the driving piston (152) and can drive the driving piston (152) to approach or move away from the connecting hole. The driven piston (154) is arranged in the air sampling pipe (14) and abuts against the inner wall of the air sampling pipe (14). The upper edge of the driven piston (154) The gas collection pipe (14) is provided with a vent hole in the longitudinal direction, the driven one-way valve (155) is provided in the vent hole and can limit the gas from passing through the driven one-way valve (155) and away from the gas storage chamber, and the driven one-way valve (155) is configured to allow the gas to pass through the vent hole and approach the gas storage chamber when the pressure difference between the two sides of the driven piston (154) is not less than the maximum static friction between the driven piston (154) and the wall of the gas collection pipe (14), and a gas collection protrusion (1511) is provided on the hole wall of the connecting hole. When the driving piston (152) is away from the connecting hole, the driving unit (15) is in a gas collection state, and the gas collection protrusion (1511) can abut against the side of the driven piston (154) facing the connecting hole; An exhaust protrusion (131) is provided on the inner wall of the third tube (13); when the driving piston (152) approaches the communicating hole, the driving unit (15) is in an exhaust state, and the exhaust protrusion (131) can abut against a side of the driven piston (154) facing away from the communicating hole.

3. The electrolyte gas generation detection device for sodium ion battery production according to claim 2, characterized in that: The drive unit (15) further includes a partition (156), wherein the partition (156) is disposed in the installation housing (151) and divides the interior of the installation housing (151) into the air storage chamber and the installation chamber; The driving member (153) includes a motor (1531), a driving gear (1532), a driven gear (1533) and a driven rod (1534), wherein the motor (1531) is arranged on the cavity wall of the installation cavity, the driving gear (1532) is arranged on the output shaft of the motor (1531), the driven gear (1533) is rotatably connected to the cavity wall of the installation cavity and meshes with the driving gear (1532), and a driving gear is provided on the rotating shaft of the driven gear (1533) along the moving direction of the driving piston (152). The driven rod (1534) is provided with an external thread matched with the driving screw hole on its rod body, one end of the driven rod (1534) passes through a through hole opened on the inner wall of the air storage chamber and is connected to the side of the driving piston (152) away from the communicating hole, the other end of the driven rod (1534) is inserted into the driving screw hole and is screwed to the driven gear (1533), and the cavity wall of the air storage chamber can abut against the driving piston (152) and limit the driving piston (152) from rotating around the central axis of the driven rod (1534).

4. The electrolyte gas generation detection device for sodium ion battery production according to claim 3, characterized in that: The driving member (153) further includes an elastic member (1535), and a threaded section and a flat section (1536) are sequentially formed in the driving screw hole along its own length direction. The flat section (1536) is located between the threaded section and the driving piston (152). When the driving piston (152) abuts against the side wall of the air storage chamber where the communicating hole is provided, the driven rod (1534) is separated from the threaded section. The elastic member (1535) is located between the end of the driven rod (1534) away from the driving piston (152) and the hole wall of the driving screw hole, and can apply a force to the driven rod (1534) away from the communicating hole.

5. The electrolyte gas generation detection device for sodium ion battery production according to claim 3, characterized in that: The invention also includes a base (3), the gas collection component (1) is arranged on the base (3), a slide rail (31) is provided on the base (3) along the length direction of the gas collection pipe (14), the detection device (2) is arranged on the slide rail (31) and can move along the slide rail (31), and the gas collection pipe (14) and the third pipe (13) as well as the gas collection pipe (14) and the connecting hole are all detachably connected.

6. The electrolyte gas generation detection device for sodium ion battery production according to claim 5, characterized in that: It also includes a telescopic cylinder (4), the cylinder body of the telescopic cylinder (4) is arranged on the base (3), the piston rod of the telescopic cylinder (4) is connected to the detection device (2), and the telescopic cylinder (4) can drive the detection device (2) to drive the third tube (13) to move closer to or away from the communicating hole; A fixing nut (1512) is rotatably connected to the mounting shell (151), a movable nut (1312) is rotatably connected to the body of the third tube (13), one end of the gas collection tube (14) is provided with an external thread that matches the movable nut (1312) and can be connected to the third tube (13) by being screwed to the movable nut (1312), and the other end of the gas collection tube (14) is provided with an external thread that matches the fixing nut (1512), and the gas collection tube (14) can be connected to the connecting hole by being screwed to the fixing nut (1512).

7. The electrolyte gas generation detection device for sodium ion battery production according to claim 6, characterized in that: The invention also includes a controller and a pressure sensor (5), wherein the pressure sensor (5) is arranged on a side of the driving piston (152) close to the connecting hole and is capable of detecting the air pressure between the driving piston (152) and the driven piston (154), and the pressure sensor (5) is electrically connected to the controller and is capable of feeding back the detection result to the controller, and the controller is electrically connected to the motor (1531) and is capable of controlling the switch of the motor (1531) according to the detection result.

8. The electrolyte gas generation detection device for sodium ion battery production according to claim 5, characterized in that: A roller (32) is provided at the bottom of the base (3).

9. The electrolyte gas generation detection device for sodium ion battery production according to claim 2, characterized in that: The driving unit (15) further comprises an exhaust one-way valve (157), an exhaust hole leading to the outside is provided on an inner wall of one side of the gas storage chamber extending in the moving direction of the driving piston (152), the exhaust one-way valve (157) is arranged in the exhaust hole and can limit external gas from passing through the exhaust one-way valve (157) and entering the gas storage chamber, and the exhaust one-way valve (157) is configured to allow gas to pass through the exhaust one-way valve (157) and leave the gas storage chamber when the pressure difference between the two sides of the driven piston (154) is less than the maximum static friction between the driven piston (154) and the wall of the gas collection pipe (14), and when the driving piston (152) approaches the connecting hole and passes over the exhaust hole, the driving unit (15) is in an exhaust state.

10. The electrolyte gas generation detection device for sodium ion battery production according to claim 9, characterized in that: It also includes a purification device (6), the air inlet of the purification device (6) is connected to the exhaust hole and can purify the gas discharged from the exhaust hole.

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