Vacuumizing device and battery baking equipment

Abstract

The utility model relates to the technical field of battery production, and discloses a vacuumizing device and battery baking equipment. The vacuumizing device comprises a vacuumizing pipeline, a vacuumizing assembly, a waste gas discharging pipeline, a waste liquid discharging pipeline and a valve assembly, one end of the vacuumizing pipeline is communicated with an air inlet of the vacuumizing assembly, the other end of the vacuumizing pipeline is used for being communicated with a cavity to be vacuumized, one end of the waste gas discharging pipeline is communicated with an air outlet of the vacuumizing assembly, and the other end of the waste gas discharging pipeline extends upwards. One end of the waste liquid discharge pipeline communicates with the lowest point of the waste gas discharge pipeline. The valve assembly is used for controlling on-off of the waste liquid discharge pipeline. The battery baking equipment comprises an oven and the vacuumizing device. Based on the vacuumizing device provided by the utility model, parts such as a complicated filtering device do not need to be arranged on the pipeline, so that the cost is reduced, the influence on the circulation of gas in the pipeline is avoided, and the vacuumizing speed and efficiency of the vacuumizing assembly are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery production technical field, concretely relates to a kind of vacuumizing device and battery baking equipment. BACKGROUND

[0002] Battery baking procedure in lithium ion battery uses oven, battery is baked under high vacuum high temperature, and the baking process makes free water in battery vaporization, vaporization water is extracted by vacuum pump, so that the moisture in battery internal drops to complete drying.Because high temperature environment influences the service life of vacuum pump, so vacuum pump needs to be set in normal temperature environment outside oven.In normal temperature environment, vaporization water changes into liquid water, cannot be smoothly extracted to waste liquid discharge, under the influence of its gravity, solid water will backflow to the lowest part of vacuum pump equipment and affect the use of vacuum pump.Currently, the method commonly used to solve this problem is to increase filter device before and after vacuum pump, liquid water is filtered to fixed waste liquid discharge by filter device, to ensure that no moisture enters vacuum pump.But this method will affect the vacuum speed and efficiency of vacuum pump, and is expensive. SUMMARY

[0003] In order to solve the technical problems of affecting the vacuum speed and efficiency of vacuum pump and being expensive in the way of adding filter device before and after vacuum pump to handle liquid water, the utility model provides a kind of vacuumizing device and battery baking equipment.

[0004] The utility model provides a kind of vacuumizing device, including vacuumizing pipeline, vacuumizing component, exhaust gas pipeline, waste liquid discharge pipeline and valve component, one end of the vacuumizing pipeline is communicated with the air inlet of the vacuumizing component, the other end is used to be communicated with the cavity to be extracted, one end of the exhaust gas pipeline is communicated with the exhaust port of the vacuumizing component, the other end extends upwards, one end of the waste liquid discharge pipeline is communicated with the lowest point of the exhaust gas pipeline, the valve component is used to control the on-off of the waste liquid discharge pipeline.

[0005] Optionally, the valve component adopts electric valve, and the electric valve is arranged to control the on-off of the waste liquid discharge pipeline.

[0006] Optionally, the electric valve includes electromagnetic valve and air control valve, the air control valve is arranged on the waste liquid discharge pipeline, the communication cavity of the air control valve is connected with first gas circuit, the cutoff cavity of the air control valve is connected with second gas circuit, and the electromagnetic valve is used to control the on-off of the first gas circuit and the second gas circuit.

[0007] Optionally, the exhaust gas pipeline extends out of the vacuumizing component, the part of the exhaust gas pipeline extending out of the vacuumizing component is bent upwards, and the waste liquid discharge pipeline is communicated with the bent position of the exhaust gas pipeline.

[0008] Optionally, the waste liquid discharge pipeline extends downwardly in a direction away from the waste gas discharge pipeline.

[0009] Optionally, the vacuumizing assembly comprises at least one vacuum pump.

[0010] Optionally, the vacuumizing assembly comprises a first vacuum pump and a second vacuum pump in communication with pipelines, the first vacuum pump is located above the second vacuum pump, the vacuumizing pipeline is in communication with an air inlet of the first vacuum pump, and the waste gas discharge pipeline is in communication with an air outlet of the second vacuum pump.

[0011] Optionally, the vacuumizing device further comprises a waste liquid collection box, and the waste liquid collection box is located below a liquid discharge end of the waste liquid discharge pipeline.

[0012] Optionally, the vacuumizing assembly is supported on the ground by a cross support, end portions of the cross support extend out of the vacuumizing assembly, and the waste liquid collection box is arranged on top of the extended end of the cross support.

[0013] The utility model further provides a battery baking equipment, including oven and above-mentioned vacuumizing device, the vacuumizing pipeline of vacuumizing device is in communication with the baking cavity of oven.

[0014] Compared with the prior art, the technical scheme provided by the utility model has the following advantages:

[0015] Based on the vacuumizing device provided by the utility model, the vacuumizing pipeline can be in communication with the baking cavity of the oven, gaseous water in the baking cavity is transferred to the waste gas discharge pipeline through the vacuumizing assembly, part of the gaseous water discharged by the waste gas discharge pipeline is liquefied to form liquid water and flows back to the lowest point of the waste gas discharge pipeline, and then is discharged through the waste liquid discharge pipeline, the on-off of the waste liquid discharge pipeline can be controlled by the valve assembly, so that the waste liquid discharge pipeline is not always open to make waste gas flow out through the waste liquid discharge pipeline, and the liquid water in the waste gas discharge pipeline can flow out in time to avoid the phenomenon that the liquid water flows back to the vacuumizing assembly, the service life of the vacuumizing assembly is increased, the vacuumizing device does not need to be provided with complicated filtering devices and other components on the pipeline, cost is reduced, the circulation of gas in the pipeline is avoided, and the vacuumizing speed and efficiency of the vacuumizing assembly are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present utility model, and together with the specification serve to explain the principles of the utility model.

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the vacuum pumping device described in the embodiment of this utility model;

[0019] Figure 2 This is a structural schematic diagram of the connection method between the waste liquid discharge pipeline and the valve assembly according to an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures

[0021] 1. Vacuuming pipeline; 2. Vacuuming assembly; 21. First vacuum pump; 22. Second vacuum pump; 3. Exhaust gas pipeline; 4. Waste liquid pipeline; 5. Valve assembly; 51. Solenoid valve; 52. Pneumatic control valve; 53. First air path; 54. Second air path; 6. Waste liquid collection box; 61. Handle; 7. Cross brace. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments and features of this utility model can be combined with each other.

[0023] The following description sets forth many specific details to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments described in the specification are only some embodiments of the present invention, and not all embodiments.

[0024] like Figure 1 As shown, the vacuuming device provided in this embodiment includes a vacuuming pipe 1, a vacuuming assembly 2, a waste gas discharge pipe 3, a waste liquid discharge pipe 4, and a valve assembly 5. One end of the vacuuming pipe 1 is connected to the air inlet of the vacuuming assembly 2, and the other end is connected to the cavity to be vacuumed. One end of the waste gas discharge pipe 3 is connected to the exhaust port of the vacuuming assembly 2, and the other end of the waste gas discharge pipe 3 extends upward. This upward extension can be inclined upward or vertical upward, and can be designed according to actual needs. The upward extension facilitates gas discharge. One end of the waste liquid discharge pipe 4 is connected to the lowest point of the waste gas discharge pipe 3. Gaseous water liquefies to form liquid water, which flows back to the lowest point of the waste gas discharge pipe 3 and is then discharged through the waste liquid discharge pipe 4. The valve assembly 5 is used to control the opening and closing of the waste liquid discharge pipe 4.

[0025] Based on the vacuumizing device, the vacuumizing pipeline 1 can be communicated with the baking cavity of the oven, the gaseous water in the baking cavity is extracted by the vacuumizing assembly 2 and is transferred to the exhaust gas pipeline 3, part of the gaseous water is liquefied to form liquid water and flows back to the lowest point of the exhaust gas pipeline 3, and then is discharged through the exhaust liquid pipeline 4, the opening and closing of the exhaust liquid pipeline 4 can be controlled by the valve assembly 5, the exhaust liquid pipeline 4 is prevented from being always opened to make the exhaust gas flow out through the exhaust liquid pipeline 4, the liquid water in the exhaust gas pipeline 3 can be ensured to flow out in time, the phenomenon that the liquid water flows back to the vacuumizing assembly 2 is avoided, and the service life of the vacuumizing assembly 2 is increased, the vacuumizing device does not need to be provided with complex filtering devices and other components on the pipeline, the cost is reduced, the circulation of the gas in the pipeline is prevented from being affected, and the vacuumizing speed and efficiency of the vacuumizing assembly 2 are ensured.

[0026] In some embodiments, the valve assembly 5 adopts an electric valve, and the electric valve is arranged to be capable of controlling the opening and closing of the exhaust liquid pipeline 4.

[0027] In the design mode, the electric valve can set the opening time of the exhaust liquid pipeline 4 according to the water content in the cavity to be vacuumized, so that the gaseous water is liquefied to form liquid water, the liquid water flows back to the lowest point of the exhaust gas pipeline 3 and is gathered to a certain extent (before flowing back to the vacuumizing assembly 2), the exhaust liquid pipeline 4 is opened, the liquid water is discharged, the phenomenon that the liquid water flows back to the vacuumizing assembly 2 is avoided, and the service life of the vacuumizing assembly 2 is increased.

[0028] In some embodiments, the electric valve can also be used in cooperation with a sensor, that is, a liquid level sensor is arranged at the lowest point of the exhaust gas pipeline 3, and the electric valve is opened when the liquid level sensor detects that the liquid level at the lowest point of the exhaust gas pipeline 3 reaches a preset liquid level.

[0029] In some embodiments, the valve assembly 5 adopts a manual valve, and at this time, the staff can manually open the manual valve according to the vacuumizing time to discharge the liquid water.

[0030] It can be seen that the design mode of the valve assembly 5 of the present application is not limited and can be selected according to actual needs.

[0031] In some embodiments, in combination with the figures shown in Figure 1 and Figure 2 , the electric valve includes a solenoid valve 51 and a gas control valve 52, the gas control valve 52 is arranged on the exhaust liquid pipeline 4, a first gas path 53 is connected to a communication cavity of the gas control valve 52, a second gas path 54 is connected to a cutoff cavity of the gas control valve 52, and the solenoid valve 51 is used to control the opening and closing of the first gas path 53 and the second gas path 54.

[0032] Specifically, the pneumatic control valve 52 includes a connecting chamber and a shut-off chamber. The valve ball of the pneumatic control valve 52 is disposed inside the waste liquid discharge pipe 4. The rotating shaft of the valve ball extends between the connecting chamber and the shut-off chamber and is connected to the transmission component. When gas is introduced into the connecting chamber of the pneumatic control valve 52, the transmission component can drive the rotating shaft to rotate, and the rotating shaft drives the valve ball to rotate to the open position. At this time, the waste liquid discharge pipe 4 is in a connected state. When gas is introduced into the shut-off chamber of the pneumatic control valve 52, the transmission component can drive the rotating shaft to rotate, and the rotating shaft drives the valve ball to rotate to the shut-off position. At this time, the waste liquid discharge pipe 4 is in a shut-off state.

[0033] In this design, the solenoid valve 51 can control the opening and closing of the first air passage 53 and the second air passage 54, thereby controlling whether the connecting chamber and the closing chamber of the pneumatic control valve 52 are filled with gas, so as to change the state of the valve ball, thereby controlling the opening and closing of the waste liquid discharge pipe 4, so as to realize the automatic opening and closing of the pneumatic control valve 52, and the liquid water can be discharged in time.

[0034] In some implementations, such as Figure 1 As shown, the exhaust gas pipe 3 extends out of the vacuum assembly 2, and the part of the exhaust gas pipe 3 extending out of the vacuum assembly 2 bends upward. The waste liquid pipe 4 is connected to the bend position of the exhaust gas pipe 3.

[0035] This design ensures that the bend in the exhaust gas pipe 3 is located at its lowest point, allowing the lowest point of the exhaust gas pipe 3 to hold more liquid water and preventing liquid water backflow.

[0036] In some embodiments, the portion of the exhaust gas pipe 3 inside the vacuum assembly 2 extends downward at an angle from the inside out. In this case, a recessed structure is formed at the bend of the exhaust gas pipe 3, further increasing the water capacity.

[0037] In some embodiments, the exhaust gas pipe 3 extends horizontally or inclined upward (at a small angle) within the vacuum assembly 2, and the portion of the exhaust gas pipe 3 extending out of the vacuum assembly 2 extends upward. At this time, the bend of the exhaust gas pipe 3 protrudes downward to form an arc-shaped protrusion, and the lowest point of the arc-shaped protrusion is the lowest point of the exhaust gas pipe 3. A groove is formed inside the arc-shaped protrusion to accommodate liquid water.

[0038] It is evident that the extension method of the exhaust gas duct 3 in this application is not limited and can be designed according to actual needs.

[0039] In some embodiments, the waste liquid discharge pipe 4 extends downward at an angle away from the waste gas discharge pipe 3. This design facilitates the discharge of liquid water from the waste gas discharge pipe 3 through the waste liquid discharge pipe 4.

[0040] In some embodiments, the bottom of the exhaust gas pipeline 3 is opened and connected with the exhaust liquid pipeline 4 through a threaded sleeve joint, which increases the convenience of disassembly and assembly.

[0041] In some embodiments, the exhaust liquid pipeline 4 is made of corrosion-resistant polytetrafluoroethylene pipeline to increase the service life. The exhaust liquid pipeline 4 is divided into two sections, one end of one section of the exhaust liquid pipeline 4 is connected with the bottom opening of the exhaust gas pipeline 3, and the other end is connected with the air control valve 52, and one end of the other section of the exhaust liquid pipeline 4 is connected with the air control valve 52, and the other end is used for discharging liquid water.

[0042] In some embodiments, the vacuum pumping assembly 2 includes at least one vacuum pump. The vacuum pump provides power for the discharge of gaseous water, and the number of vacuum pumps can be one or more according to the power requirement, which can be designed according to the actual requirement.

[0043] In some embodiments, the vacuum pumping assembly 2 includes a pipeline-communicated first vacuum pump 21 and a second vacuum pump 22, the first vacuum pump 21 is located above the second vacuum pump 22, the vacuum pipeline 1 is communicated with the air inlet of the first vacuum pump 21, and the exhaust gas pipeline 3 is communicated with the air outlet of the second vacuum pump 22.

[0044] In this design, the number of vacuum pumps is two, which can ensure that the power provided meets the demand while reducing equipment cost, and the design of the stacked first vacuum pump 21 and the second vacuum pump 22 can reduce the space occupation.

[0045] In some embodiments, the air outlet of the first vacuum pump 21 and the air inlet of the second vacuum pump 22 are connected through a corrugated pipe to increase the sealing effect.

[0046] In some embodiments, the rotational speed of the first vacuum pump 21 is lower than that of the second vacuum pump 22, at this time, the first vacuum pump 21 is a Roots vacuum pump, and the second vacuum pump 22 is a dry vacuum pump. The Roots vacuum pump refers to a variable volume vacuum pump with two counter-rotating lobed rotors inside the pump, and the rotors and the inner wall of the pump shell have a small gap and do not contact each other. The dry vacuum pump refers to a pump that can start pumping from atmospheric pressure and directly discharge the pumped gas to the atmosphere, and the pump cavity is free of oil or other working medium, and the limit pressure of the pump is equal to or close to that of the oil seal type vacuum pump. The Roots vacuum pump and the dry vacuum pump are both conventional equipment, and their structures and working principles are not described in detail here.

[0047] It can be understood that the first vacuum pump 21 and the second vacuum pump 22 can also use other pump body structures, which can be designed according to the actual requirement.

[0048] In some embodiments, as shown in FIG. 1, the vacuum pumping assembly 2 includes a vacuum pipeline 1, an exhaust gas pipeline 3, an exhaust liquid pipeline 4, an air control valve 52, a first vacuum pump 21 and a second vacuum pump 22. Figure 1As shown, the vacuumizing device further comprises a waste liquid collecting box 6, which is located below the liquid outlet end of the waste liquid discharging pipeline 4.

[0049] In this design, the waste liquid collecting box 6 is arranged to facilitate the collection of liquid water, so that the liquid water can be concentrated for treatment, thereby avoiding environmental pollution.

[0050] In some embodiments, the liquid outlet end of the waste liquid discharging pipeline 4 is bent downward, wherein the liquid outlet end of the waste liquid discharging pipeline 4 can be bent downward by a bend, so as to facilitate the flow of liquid water discharged through the waste liquid discharging pipeline 4 to the waste liquid collecting box 6.

[0051] In some embodiments, the waste liquid collecting box 6 is a rectangular box structure with an open top, and corresponding two sides of the rectangular box are provided with handles 61, thereby increasing the convenience of the staff in taking the waste liquid collecting box 6.

[0052] In some embodiments, the vacuumizing assembly 2 is supported on the ground by a cross brace 7, and the cross brace 7 is preferably two, which are arranged at intervals to ensure the support effect of the vacuumizing assembly 2. The end of the cross brace 7 extends out of the vacuumizing assembly 2, and the waste liquid collecting box 6 is arranged on the top of the extended end of the cross brace 7, thereby facilitating the installation of the waste liquid collecting box 6 and reducing the occupation of additional space.

[0053] The working process of the vacuumizing device provided in the present application is as follows:

[0054] The high-temperature gas generated in the vacuum cavity baking process is drawn into the low-speed Roots vacuum pump through the vacuumizing pipeline 1, connected to the high-speed dry vacuum pump through the corrugated pipe, and the generated exhaust gas is discharged through the exhaust gas discharging pipeline 3 after passing through the two vacuum pumps. The gas discharged by the dry vacuum pump becomes a liquid state at the lowest point of the exhaust gas discharging pipeline 3 due to the alternating cold and hot, and cannot be discharged, and then accumulates at the lowest point (bent position) of the exhaust gas discharging pipeline 3. At this time, since the lowest point of the exhaust gas discharging pipeline 3 is connected to the waste liquid discharging pipeline 4, the liquid flows out of the water outlet end of the waste liquid discharging pipeline 4 under its own weight, and is then collected by the waste liquid collecting box 6.

[0055] The utility model further provides a battery baking equipment, including oven and above-mentioned vacuumizing device, the vacuumizing pipeline 1 of vacuumizing device is connected with the baking cavity of oven. The vacuumizing device at this place includes all the technical features of the above-mentioned vacuumizing device.

[0056] The battery baking equipment of the design has a large amount of gaseous water generated under the high-temperature and high-vacuum baking state of the battery in the baking cavity, the gaseous water is extracted from the baking cavity by the vacuum extraction assembly 2 and transferred to the exhaust gas pipeline 3 through the vacuum extraction assembly 2. The part of the gaseous water discharged from the exhaust gas pipeline 3 is liquefied to form liquid water and flows back to the lowest point of the exhaust gas pipeline 3, and then is discharged through the exhaust liquid pipeline 4, and the opening and closing of the exhaust liquid pipeline 4 can be controlled by the valve assembly 5. The design does not affect the sealing performance and vacuum extraction efficiency of the vacuum extraction assembly 2, can realize the automatic discharge of the liquid water in front of the valve assembly 5 through the valve assembly 5, does not affect the whole baking process, and does not need to replace any parts if the pipeline and the valve assembly 5 are not corroded, thereby reducing the maintenance cost.

[0057] It should be noted that, in this document, relational terms such as“first” and“second”, and the like, are used solely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms“comprises”,“comprising”, or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by“comprises a...” does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0058] The above descriptions are only specific embodiments of the present application, which enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments described herein, but will conform to the widest scope consistent with the principles and novel features described herein.

Claims

1. A vacuuming device, characterized in that The vacuum device comprises a vacuum pipeline (1), a vacuum assembly (2), a waste gas pipeline (3), a waste liquid pipeline (4) and a valve assembly (5), one end of the vacuum pipeline (1) is communicated with the air inlet of the vacuum assembly (2), and the other end is used for being communicated with a cavity to be vacuumized, one end of the waste gas pipeline (3) is communicated with the air outlet of the vacuum assembly (2), and the other end extends upward, one end of the waste liquid pipeline (4) is communicated with the lowest point of the waste gas pipeline (3), and the valve assembly (5) is used for controlling the opening and closing of the waste liquid pipeline (4).

2. The evacuation device of claim 1, wherein, The valve assembly (5) adopts an electric valve, and the electric valve is arranged to be capable of controlling the opening and closing of the waste liquid pipeline (4).

3. The evacuation device of claim 2, wherein, The electric valve comprises a solenoid valve (51) and an air control valve (52), the air control valve (52) is arranged on the waste liquid pipeline (4), a first air path (53) is connected to the communication cavity of the air control valve (52), a second air path (54) is connected to the cut-off cavity of the air control valve (52), and the solenoid valve (51) is used for controlling the opening and closing of the first air path (53) and the second air path (54).

4. The evacuation device of claim 1, wherein, The waste gas pipeline (3) extends out of the vacuum assembly (2), the part of the waste gas pipeline (3) extending out of the vacuum assembly (2) is bent upward, and the waste liquid pipeline (4) is communicated with the bent position of the waste gas pipeline (3).

5. The evacuation device of claim 1, wherein, The waste liquid pipeline (4) extends downward along a direction away from the waste gas pipeline (3).

6. The evacuation device of claim 1, wherein, The vacuum assembly (2) comprises at least one vacuum pump.

7. The evacuation device of claim 1, wherein, The vacuum assembly (2) comprises a first vacuum pump (21) and a second vacuum pump (22) communicated by pipelines, the first vacuum pump (21) is located above the second vacuum pump (22), the vacuum pipeline (1) is communicated with the air inlet of the first vacuum pump (21), and the waste gas pipeline (3) is communicated with the air outlet of the second vacuum pump (22).

8. The evacuation device of claim 1, wherein, The vacuum device further comprises a waste liquid collecting box (6), and the waste liquid collecting box (6) is located below the liquid discharge end of the waste liquid pipeline (4).

9. The evacuation device of claim 8, wherein, The vacuum assembly (2) is supported on the ground by a cross support (7), the end of the cross support (7) extends out of the vacuum assembly (2), and the waste liquid collecting box (6) is arranged on the top of the extended end of the cross support (7).

10. A battery baking apparatus, characterized by, The vacuum device comprises an oven and the vacuum device as claimed in any one of claims 1 to 9, and the vacuum pipeline (1) of the vacuum device is communicated with the baking cavity of the oven.

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