Lithium battery low-temperature electrolyte reaction kettle

Abstract

The lithium battery low-temperature electrolyte reaction kettle comprises a reaction kettle body, an exhaust valve and a pressure detection mechanism, the reaction kettle body is provided with a reaction cavity, the top end of the reaction kettle body is provided with an exhaust pipe and a gas guide pipe which are communicated with the reaction cavity, the exhaust valve is arranged on the exhaust pipe, and the pressure detection mechanism is arranged on the gas guide pipe. The pressure detection mechanism comprises a pressure sensor arranged at the tail end of the air guide pipe, and the pressure sensor is suitable for sensing the air pressure in the air guide pipe. According to the lithium battery low-temperature electrolyte reaction kettle disclosed by the utility model, the pressure sensor is not easy to damage due to corrosion of low-temperature electrolyte, and the pressure sensor is more convenient to replace.

Description

Technical Field

[0001] The utility model relates to an electrolyte preparation device, in particular to a lithium battery low-temperature electrolyte reactor. Background Art

[0002] Low-temperature electrolytes are widely used in lithium batteries due to their superior low-temperature resistance. The production and preparation of low-temperature electrolytes requires a reactor, where various electrolyte raw materials are added to the reactor for mixing and chemical reaction to form the low-temperature electrolyte. A certain positive pressure must be maintained within the reactor to reduce volatilization of the solution. However, during the preparation of the low-temperature electrolyte, some of the solution in the reactor inevitably evaporates, gradually increasing the pressure within the reactor. Excessive pressure not only affects the preparation of the low-temperature electrolyte but can even cause safety accidents.

[0003] In the prior art, reactors are typically equipped with an exhaust pipe equipped with an exhaust valve. Opening the exhaust valve allows exhaust to occur, thereby reducing the pressure within the reactor. Furthermore, a pressure sensor is installed within the reactor to monitor the pressure in real time. The exhaust valve opens and closes based on the data monitored by the pressure sensor to avoid situations where the pressure within the reactor is too high while the exhaust valve is not open, or where the pressure within the reactor is too low while the exhaust valve is not closed.

[0004] However, it was found during use that the pressure sensor was located in the reactor, which was not only easily corroded by the low-temperature electrolyte and damaged, but also inconvenient to replace after damage. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a lithium battery low-temperature electrolyte reactor, in which the pressure sensor is not easily damaged by corrosion from the low-temperature electrolyte and is more convenient to replace.

[0006] The lithium battery low-temperature electrolyte reactor according to the embodiment of the present invention includes:

[0007] The reactor body has a reaction chamber, and the top of the reactor body is provided with an exhaust pipe and an air guide pipe connected to the reaction chamber;

[0008] An exhaust valve is provided on the exhaust pipe to control the opening and closing of the exhaust pipe;

[0009] The pressure detection mechanism comprises a pressure sensor provided at the end of the airway tube, wherein the pressure sensor is suitable for sensing the air pressure in the airway tube.

[0010] The lithium battery low-temperature electrolyte reactor according to the embodiment of the present invention has at least the following beneficial effects:

[0011] When it is necessary to prepare a low-temperature electrolyte, a variety of electrolyte raw materials are added to the reaction chamber of the reactor body for mixing and chemical reaction to form a low-temperature electrolyte. Since the air duct is connected to the reaction chamber, the air pressure in the air duct is consistent with that in the reaction chamber, and the pressure sensor senses the air pressure in the air duct, that is, senses the air pressure in the reaction chamber. When the pressure sensor detects that the air pressure in the reaction chamber is too high, the exhaust valve can be opened to exhaust, thereby reducing the air pressure in the reaction chamber. When the pressure sensor detects that the air pressure in the reaction chamber drops to a suitable range, the exhaust valve can be closed to avoid the air pressure in the reaction chamber being too low. According to the lithium battery low-temperature electrolyte reactor of the embodiment of the present invention, since the pressure sensor indirectly detects the air pressure in the reaction chamber through the air duct, the pressure sensor is located outside the reactor body and is not located in the reaction chamber. Therefore, the pressure sensor is not easily corroded by the low-temperature electrolyte in the reaction chamber and damaged, and it is more convenient to replace the pressure sensor.

[0012] According to some embodiments of the present invention, the pressure detection mechanism also includes a cylinder, in which a piston is slidably installed, the cylinder having a first end and a second end relative to each other, the first end being provided with an air inlet hole, the second end being provided with an air vent hole, the end of the air duct being connected to the air inlet hole, and the pressure sensor being provided at the second end, wherein the piston can slide toward the second end until it abuts against the pressure sensor.

[0013] According to some embodiments of the present invention, a reset structure is provided between the piston and the cylinder, and the reset structure applies a force from the second end to the first end to the piston.

[0014] According to some embodiments of the present invention, the reset structure includes a reset spring disposed between the piston and the cylinder, and the reset spring applies an elastic restoring force from the second end to the first end to the piston.

[0015] According to some embodiments of the present invention, the return spring is provided at an end of the piston close to the second end.

[0016] According to some embodiments of the present invention, an abutment portion is provided at one end of the piston close to the second end. Along the sliding direction of the piston, the distance between the abutment portion and the pressure sensor is smaller than the distance between the piston and the vent hole. The piston can slide toward the second end until the abutment portion abuts against the pressure sensor.

[0017] According to some embodiments of the present invention, a connecting rod is provided at one end of the piston close to the second end, the connecting rod extends along the sliding direction of the piston, the abutment is provided at the end of the connecting rod, a mounting plate is provided in the cylinder between the piston and the second end, the mounting plate is provided with a clearance hole for the connecting rod to pass through, the return spring is sleeved on the connecting rod, and the end of the return spring close to the second end is connected to the mounting plate.

[0018] According to some embodiments of the present invention, the aperture of the clearance hole is larger than the outer diameter of the connecting rod; and / or the mounting plate is provided with a through hole.

[0019] According to some embodiments of the present invention, the cylinder is vertically arranged, the bottom end of the cylinder forms the first end, and the reset structure includes a counterweight provided on the piston.

[0020] According to some embodiments of the present invention, the counterweight is arranged at the top end of the piston. Along the vertical direction, the distance between the counterweight and the pressure sensor is smaller than the distance between the piston and the vent hole. The piston can slide toward the second end until the counterweight abuts the pressure sensor.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a schematic diagram of one structure of a pressure detection mechanism;

[0025] Figure 3 This is another structural diagram of the pressure detection mechanism.

[0026] Figure Number:

[0027] Reactor body 100; exhaust pipe 101; air guide pipe 102;

[0028] Exhaust valve 200;

[0029] Pressure detection mechanism 300; pressure sensor 301; cylinder 302; piston 303; first end 304; second end 305; air inlet 306; air vent 307; return spring 308; abutment portion 309; connecting rod 310; mounting plate 311; clearance hole 312; counterweight 313. DETAILED DESCRIPTION

[0030] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of this utility model, "a plurality" refers to two or more. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0034] Reference below Figures 1 to 3 The invention describes a low-temperature electrolyte reactor for lithium batteries according to an embodiment of the invention.

[0035] like Figures 1 to 3 As shown, the lithium battery low-temperature electrolyte reactor according to an embodiment of the present invention includes a reactor body 100 , an exhaust valve 200 and a pressure detection mechanism 300 .

[0036] Among them, the reactor body 100 has a reaction chamber, and the top of the reactor body 100 is provided with an exhaust pipe 101 and an air duct 102 connected to the reaction chamber. The exhaust valve 200 is provided on the exhaust pipe 101 to control the on-off of the exhaust pipe 101. The pressure detection mechanism 300 includes a pressure sensor 301 provided at the end of the air duct 102. The pressure sensor 301 is suitable for sensing the air pressure in the air duct 102.

[0037] When a low-temperature electrolyte needs to be prepared, multiple electrolyte raw materials are added to the reaction chamber of the reactor body 100 for mixing and chemical reaction to form a low-temperature electrolyte. Since the gas pipe 102 is connected to the reaction chamber, the air pressure in the gas pipe 102 is consistent with that in the reaction chamber. The pressure sensor 301 senses the air pressure in the gas pipe 102, that is, the air pressure in the reaction chamber. When the pressure sensor 301 detects that the air pressure in the reaction chamber is too high, the exhaust valve 200 can be opened to exhaust, thereby reducing the air pressure in the reaction chamber. When the pressure sensor 301 detects that the air pressure in the reaction chamber has dropped to an appropriate range, the exhaust valve 200 can be closed to prevent the air pressure in the reaction chamber from being too low.

[0038] According to the lithium battery low-temperature electrolyte reactor of the embodiment of the present invention, since the pressure sensor 301 indirectly detects the air pressure in the reaction chamber through the air duct 102, the pressure sensor 301 is located outside the reactor body 100 and is not located in the reaction chamber. Therefore, the pressure sensor 301 is not easily corroded by the low-temperature electrolyte in the reaction chamber and damaged, and it is more convenient to replace the pressure sensor 301.

[0039] It should be noted that the exhaust pipe 101 and the air guide pipe 102 are arranged at the top of the reactor body 100 to prevent the electrolyte raw materials and low-temperature electrolyte from entering. The exhaust valve 200 can be an ordinary valve that can exhaust. The pressure sensor 301 can be electrically connected to a controller. The controller can be electrically connected to a display or an alarm. When the pressure sensor 301 detects that the air pressure in the reaction chamber is too high or too low, the pressure sensor 301 sends a signal to the controller. The controller controls the display to display or the alarm to sound an alarm. The staff can know and operate the exhaust valve 200 to open and close the exhaust valve 200. Of course, the exhaust valve 200 can also be a solenoid valve. The controller is directly electrically connected to the exhaust valve 200. When the pressure sensor 301 detects that the air pressure in the reaction chamber is too high or too low, the pressure sensor 301 sends a signal to the controller. The controller directly controls the exhaust valve 200 to open and close, which is more convenient to use. The pressure sensor 301 is adapted to sense the air pressure within the airway tube 102. Specifically, the gas within the airway tube 102 can act on the sensing position of the pressure sensor 301, thereby enabling the pressure sensor 301 to sense the air pressure within the airway tube 102. It will be appreciated that the pressure sensor 301, the exhaust valve 200, the controller, the display, and the alarm are all very common devices, and their structures and operating principles are not further described here.

[0040] In some embodiments of the present invention, Figure 2 and Figure 3As shown, the pressure detection mechanism 300 also includes a cylinder 302, in which a piston 303 is slidably installed. The cylinder 302 has a first end 304 and a second end 305 relative to each other. The first end 304 is provided with an air inlet hole 306, and the second end 305 is provided with an air vent 307. The end of the air guide tube 102 is connected to the air inlet hole 306, and the pressure sensor 301 is provided at the second end 305, wherein the piston 303 can slide toward the second end 305 until it abuts the pressure sensor 301. When the solution in the reaction chamber evaporates and produces gas, the gas enters the cavity between the piston 303 and the first end 304 within the cylinder 302 through the gas pipe 102. The increased gas pressure pushes the piston 303 toward the second end 305 until it contacts the pressure sensor 301, allowing the pressure sensor 301 to sense the pressure. As the gas pressure continues to increase, the pressure exerted by the piston 303 on the pressure sensor 301 also increases. When the gas pressure decreases, the pressure exerted by the piston 303 on the pressure sensor 301 also decreases. In other words, the pressure sensor 301 can indirectly sense the gas pressure within the reaction chamber through the piston 303. In this embodiment, the pressure sensor 301 indirectly senses the gas pressure within the gas pipe 102 and the reaction chamber through the piston 303, without direct contact with the gas within the gas pipe 102. This prevents the gas generated by the evaporation of the solution in the reaction chamber from corroding the pressure sensor 301, thereby extending the service life of the pressure sensor 301.

[0041] It should be noted that in some other embodiments of the present invention, the air in the air duct 102 may directly contact the pressure sensor 301, thereby directly acting on the pressure sensor 301. In this case, an anti-corrosion coating may be sprayed on the pressure sensor 301, or the pressure sensor 301 may be made of an anti-corrosion material. The piston 303 can slide, and thus the pressure applied to the pressure sensor 301 can be adjusted according to the size of the air pressure, thereby making the pressure sensor 301 detection more accurate. The pressure sensor 301 can be mounted on the cylinder 302 by fasteners, or it can be snap-fitted or threaded to the cylinder 302 for easy replacement. A vent hole 307 is provided to facilitate the communication between the inner cavity of the cylinder 302 between the second end 305 and the piston 303 and the outside world, thereby facilitating the sliding of the piston 303.

[0042] In some embodiments of the present invention, Figure 2 and Figure 3As shown, a reset structure is provided between the piston 303 and the cylinder 302. The reset structure applies a force from the second end 305 to the first end 304 on the piston 303. The reset structure is provided to apply a force from the second end 305 to the first end 304 on the piston 303. When the gas pressure rises to a point where the force applied to the piston 303 is greater than the resistance applied by the reset structure, the piston 303 slides toward the second end 305 and abuts the pressure sensor 301, which can then sense the pressure. When the gas pressure continues to rise, the pressure detected by the pressure sensor 301 also continues to rise. When the pressure detected by the pressure sensor 301 reaches a set value, the exhaust valve 200 can be opened to exhaust. When the gas pressure drops to a point where the force applied to the piston 303 is less than the resistance applied by the reset structure, the reset structure pushes the piston 303 to slide toward the first end 304, thereby separating the piston 303 from the pressure sensor 301. When the pressure detected by the pressure sensor 301 disappears, the exhaust valve 200 can be closed.

[0043] In this embodiment, a reset structure is provided, which can make the pressure applied by the piston 303 to the pressure sensor 301 less than the pressure applied by the gas to the piston 303, thereby enabling the pressure sensor 301 to detect a larger air pressure and avoiding damage to the pressure sensor 301 due to excessive pressure. In addition, when the air pressure in the reaction chamber is reduced to a level that makes the force applied to the piston 303 less than the resistance applied by the reset structure, the piston 303 can be reset. At this time, the exhaust valve 200 can be closed without the need to reduce the pressure in the reaction chamber to atmospheric pressure, thereby maintaining a certain positive pressure in the reaction chamber.

[0044] In some embodiments of the present invention, Figure 2 As shown, the reset structure includes a reset spring 308 disposed between the piston 303 and the cylinder 302. The reset spring 308 applies an elastic restoring force on the piston 303, directed from the second end 305 to the first end 304. When the gas pressure rises, causing the piston 303 to slide toward the second end 305, the reset spring 308 deforms and generates an elastic restoring force, which acts on the piston 303 and exerts resistance on the piston 303. When the gas pressure drops to a point where the force applied to the piston 303 is less than the elastic restoring force applied by the reset spring 308, the reset spring 308 pushes the piston 303 to slide toward the first end 304. The reset spring 308 has a simple structure, is easy to install, and has a good reset effect.

[0045] In some embodiments of the present invention, Figure 2As shown, the return spring 308 is disposed at the end of the piston 303 near the second end 305. This arrangement isolates the return spring 308 from volatile gases, thereby preventing corrosion damage to the return spring 308 caused by gases generated by the volatile solution in the reaction chamber, thereby extending the service life of the return spring 308. Of course, the return spring 308 can also be disposed at the end of the piston 303 near the first end 304. In this case, the return spring 308 can be sprayed with an anti-corrosion coating.

[0046] In some embodiments of the present invention, Figure 2 As shown, an abutment portion 309 is provided at one end of the piston 303 near the second end 305. Along the sliding direction of the piston 303, the distance between the abutment portion 309 and the pressure sensor 301 is smaller than the distance between the piston 303 and the vent hole 307. The piston 303 can slide toward the second end 305 until the abutment portion 309 abuts the pressure sensor 301. Specifically, the pressure sensor 301 can be provided at the end of the second end 305, and the vent hole 307 can be provided on the side wall of the second end 305. In this embodiment, the abutment portion 309 is provided, and along the sliding direction of the piston 303, the distance between the abutment portion 309 and the pressure sensor 301 is smaller than the distance between the piston 303 and the vent hole 307. Furthermore, when the abutment portion 309 abuts the pressure sensor 301, the piston 303 has not yet slid to contact the vent hole 307, let alone passed through the vent hole 307, thereby preventing the vent hole 307 from affecting the sliding of the piston 303 and preventing the gas in the reaction chamber from being directly discharged from the vent hole 307.

[0047] In some embodiments of the present invention, Figure 2 As shown, a connecting rod 310 is provided at one end of the piston 303 near the second end 305. The connecting rod 310 extends in the sliding direction of the piston 303, and an abutment portion 309 is provided at the end of the connecting rod 310. A mounting plate 311 is provided within the cylinder 302 between the piston 303 and the second end 305. The mounting plate 311 has a clearance hole 312 for the connecting rod 310 to pass through. The return spring 308 is sleeved on the connecting rod 310, and the end of the return spring 308 near the second end 305 is connected to the mounting plate 311. The connecting rod 310 can guide the return spring 308, preventing the return spring 308 from bending directly to one side, thereby reducing its elastic effect or even damaging the return spring 308.

[0048] In some embodiments of the present invention, Figure 2As shown, the diameter of the clearance hole 312 is larger than the outer diameter of the connecting rod 310. In other words, a gap is reserved between the wall of the clearance hole 312 and the outer wall of the connecting rod 310. This arrangement facilitates gas flow on both sides of the mounting plate 311, thereby ensuring smoother sliding of the piston 303. Of course, in other embodiments of the present invention, through holes may also be provided in the mounting plate 311.

[0049] In some embodiments of the present invention, Figure 3 As shown, cylinder 302 is vertically arranged, with the bottom end of cylinder 302 forming first end 304. The reset structure includes a counterweight 313 disposed on piston 303. The gravity of counterweight 313 exerts a downward force on piston 303, that is, a force directed from second end 305 toward first end 304. Counterweight 313 has a simple structure and is easy to install.

[0050] In some embodiments of the present invention, Figure 3 As shown, the counterweight 313 is provided at the top end of the piston 303. In the vertical direction, the distance between the counterweight 313 and the pressure sensor 301 is smaller than the distance between the piston 303 and the vent hole 307. The piston 303 can slide toward the second end 305 until the counterweight 313 abuts the pressure sensor 301. Specifically, the pressure sensor 301 can be provided at the end of the second end 305, and the vent hole 307 can be provided on the side wall of the second end 305. In this embodiment, the counterweight 313 is provided at the top end of the piston 303. In the vertical direction, the distance between the counterweight 313 and the pressure sensor 301 is smaller than the distance between the piston 303 and the vent hole 307. Furthermore, when the counterweight 313 abuts the pressure sensor 301, the piston 303 has not yet slid to contact the vent hole 307, let alone passed through the vent hole 307, thereby preventing the vent hole 307 from affecting the sliding of the piston 303 and preventing the gas generated by volatilization from being directly discharged from the vent hole 307.

[0051] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A lithium battery low temperature electrolyte reactor, characterized in that: include: The reactor body has a reaction chamber, and the top of the reactor body is provided with an exhaust pipe and an air guide pipe connected to the reaction chamber; An exhaust valve is provided on the exhaust pipe to control the on / off of the exhaust pipe; a pressure detection mechanism, comprising a pressure sensor provided at the end of the airway tube, the pressure sensor being adapted to sense the air pressure within the airway tube; The pressure detection mechanism also includes a cylinder, in which a piston is slidably installed. The cylinder has a first end and a second end relative to each other, the first end is provided with an air inlet hole, and the second end is provided with an air vent hole. The end of the air guide tube is connected to the air inlet hole, and the pressure sensor is provided at the second end, wherein the piston can slide toward the second end until it abuts the pressure sensor.

2. The lithium battery low-temperature electrolyte reactor according to claim 1, characterized in that: A reset structure is provided between the piston and the cylinder, and the reset structure applies a force from the second end to the first end to the piston.

3. The lithium battery low-temperature electrolyte reactor according to claim 2, characterized in that: The reset structure includes a reset spring disposed between the piston and the cylinder, and the reset spring applies an elastic restoring force from the second end to the first end to the piston.

4. The lithium battery low-temperature electrolyte reactor according to claim 3, characterized in that: The return spring is arranged at one end of the piston close to the second end.

5. The lithium battery low-temperature electrolyte reactor according to claim 4, characterized in that: An abutment portion is provided at one end of the piston close to the second end. Along the sliding direction of the piston, the distance between the abutment portion and the pressure sensor is smaller than the distance between the piston and the vent hole. The piston can slide toward the second end until the abutment portion abuts against the pressure sensor.

6. The lithium battery low-temperature electrolyte reactor according to claim 5, characterized in that: A connecting rod is provided at one end of the piston close to the second end, and the connecting rod extends along the sliding direction of the piston. The abutment portion is provided at the end of the connecting rod. A mounting plate is provided in the cylinder between the piston and the second end, and the mounting plate is provided with a clearance hole for the connecting rod to pass through. The return spring is sleeved on the connecting rod, and the end of the return spring close to the second end is connected to the mounting plate.

7. The lithium battery low-temperature electrolyte reactor according to claim 6, characterized in that: The aperture of the relief hole is larger than the outer diameter of the connecting rod; and / or, The mounting plate is provided with a through hole.

8. The lithium battery low-temperature electrolyte reactor according to claim 2, characterized in that: The cylinder is vertically arranged, the bottom end of the cylinder forms the first end, and the reset structure includes a counterweight member arranged on the piston.

9. The lithium battery low-temperature electrolyte reactor according to claim 8, characterized in that: The counterweight is provided at the top end of the piston. In the vertical direction, the distance between the counterweight and the pressure sensor is smaller than the distance between the piston and the vent hole. The piston can slide toward the second end until the counterweight abuts the pressure sensor.

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