Explosion-proof drying box for lithium battery experiment

Abstract

The utility model discloses an explosion-proof drying box for lithium battery experiment, which comprises a drying box body assembly, a pipeline assembly and a heating bag assembly, the pipeline assembly comprises a circulating air pipe, a connecting air pipe, a fresh air pipe, a circulating fan, an exhaust fan and an exhaust air pipe, and the drying box body assembly comprises a drying box body. A first air outlet of the drying box body is connected with a first circulating air pipe, the first circulating air pipe is connected with an air inlet of a circulating fan, an air outlet of the circulating fan is connected with a connecting air pipe, the connecting air pipe is connected with an air inlet of a heating bag assembly, and an air outlet of the heating bag assembly is connected with an air inlet of the drying box body. The fresh air pipe is connected with the circulating air pipe, the exhaust fan is arranged on the upper portion of the drying box body assembly, the exhaust air pipe is connected with the second air outlet of the drying box body, and the exhaust fan is connected with the exhaust air pipe. The drying device can safely realize the drying function, solve the potential safety hazard and effectively recover the NMP (N-Methyl Pyrrolidone) gas.

Description

Technical Field

[0001] The utility model relates to a drying box, in particular to an explosion-proof drying box for lithium battery experiments. Background Art

[0002] The existing small drying equipment exposed some defects of traditional drying boxes during the experiment. When drying the cathode slurry of lithium battery membrane, the slurry used in the experiment contained NMP solution, which would produce NMP gas harmful to human body during the drying process. When the concentration of NMP gas in the closed environment was too high, it would explode. The drying function could not be realized safely, which caused some safety hazards to the personnel during operation, and the NMP gas could not be connected to the plant recovery system for recycling in time. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides an explosion-proof drying box for lithium battery experiments, which solves the problem that when the cathode slurry of the lithium battery membrane is dried in a traditional drying box, the NMP solution will produce NMP gas harmful to the human body, and the NMP gas concentration will explode if it is too high. The utility model can ensure the safety of the experimenters and the effective recovery of the NMP gas.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A lithium battery experiment explosion-proof drying box, comprising a drying box body assembly, a pipeline assembly and a heating pack assembly, the electrical box assembly and the drying box body assembly are arranged on the top of the bracket assembly, the pipeline assembly comprises a circulating air duct, a connecting air duct, a fresh air duct, a circulating fan, an exhaust fan and an exhaust air duct, the drying box body assembly comprises a drying box body, a first air outlet of the drying box body is connected to the first circulating air duct, the first circulating air duct is connected to the air inlet of the circulating fan, the air outlet of the circulating fan is connected to the connecting air duct, the connecting air duct is connected to the air inlet of the heating pack assembly, the air outlet of the heating pack assembly is connected to the air inlet of the drying box body, the fresh air duct is connected to the circulating air duct, the exhaust fan is arranged on the upper part of the drying box body assembly, the exhaust air duct is connected to the second air outlet of the drying box body, and the exhaust fan is connected to the exhaust air duct.

[0006] As a further improvement of the above technical solution, the drying box body assembly includes a drying box partition, a plurality of the drying box partitions are arranged inside the drying box body, and a first heat insulation layer is arranged between the inner surface and the outer surface of the drying box body.

[0007] As a further improvement of the above technical solution, the drying box body assembly further includes a drying box door, one end of which is connected to the drying box body via a hinge, and a first observation window is provided on the drying box door.

[0008] As a further improvement of the above technical solution, an exhaust fan bracket is provided on the upper part of the drying box body, and the exhaust fan bracket is provided on the upper part of the drying box body, and the fan shock-absorbing pad is provided on the exhaust fan bracket.

[0009] As a further improvement of the above technical solution, the first air outlet is provided with a first filter.

[0010] As a further improvement of the above technical solution, the heating pack assembly includes a heating pack shell, a manual air valve, a second filter and a PTC heater, a second insulation layer is provided between the inner surface and the outer surface of the heating pack shell, the PTC heater is fixedly connected to the interior of the heating pack shell, the PTC heater and the second filter are arranged on the same horizontal plane, the manual air valve is arranged inside the heating pack shell, and the manual air valve is used to adjust the air volume inside the heating pack shell.

[0011] As a further improvement of the above technical solution, a sensor reserved opening is provided on the heating pack shell, and a sealing member is provided on the sensor reserved opening.

[0012] As a further improvement of the above technical solution, a peek window and a wire management box are provided at the end of the PTC heater.

[0013] As a further improvement of the above technical solution, a glass fiber block is provided on the heating package shell, and a copper bar is provided on the glass fiber block, and the copper bar is used for wiring the PTC heater.

[0014] As a further improvement of the above technical solution, the electrical box assembly includes an electrical box body and an electrical box door, the electrical box door is provided with a second observation window, and fans are provided on both sides of the electrical box body.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides an explosion-proof drying box for lithium battery experiments. By adding an independent exhaust fan on the top of the drying box body to exhaust the drying box body, the normally open exhaust fan can effectively ensure the stability of the NMP concentration inside the drying box body. The NMP concentration detector can be installed on the sensor reserved port to effectively monitor the NMP concentration content, and minimize the possibility of the box body exploding due to excessive NMP concentration. The independently controlled exhaust fan can create a negative pressure environment when exhausting air, ensuring that NMP gas will only enter the NMP recovery system of the factory through the explosion-proof exhaust fan, realizing the safe recovery of toxic gases, thereby achieving safe drying of the slurry. The placement platform of the heating pack assembly is slightly lower than the placement platform of the drying box body assembly, thereby lowering the position of the air outlet of the heating pack shell. On the premise that the internal space of the bracket assembly can accommodate the circulating fan, try to make the air outlet in the middle of the box, and the circulating fan runs at the rear to create a negative pressure environment for the circulating air duct, and draw the hot air in the box and the ambient air outside the box into the circulating air duct for circulation. The air valve assembly attached to the fresh air filter component is not allowed to be fully closed. It is necessary to ensure that fresh air continues to enter the box to avoid the exhaust fan continuously drawing air and causing a vacuum inside the box. The circulating fan continuously sends air into the heating pack shell. The air passes through the gap between the PTC heaters during the upward process to be heated, and then passes through the second filter to prevent foreign matter from entering the box. The frequency of the exhaust fan is reduced, and the frequency of the circulating fan is always kept greater than that of the exhaust fan. When the circulating air volume is greater than the exhaust air volume, the temperature in the box will gradually rise to the set value, thereby achieving drying of the slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the assembly of the utility model;

[0019] Figure 2 This is a schematic diagram of the assembly of the utility model from another angle;

[0020] Figure 3 It is a schematic diagram of the pipeline assembly structure;

[0021] Figure 4 This is a schematic diagram of the structure of the pipeline assembly from another angle;

[0022] Figure 5 It is a schematic diagram of the structure of the drying box body assembly;

[0023] Figure 6 This is another structural schematic diagram of the drying box body assembly;

[0024] Figure 7 It is a schematic diagram of the heating pack assembly structure;

[0025] Figure 8 It is a schematic diagram of the structure of the electrical box assembly.

[0026] Reference numerals:

[0027] 1. Pipeline assembly; 101. First circulation air duct; 102. Second circulation air duct; 103. Connecting air duct; 104. Circulating fan; 105. Fresh air filter component; 106. Fresh air duct; 107. Exhaust air duct; 108. Exhaust fan; 2. Drying box body assembly; 201. Drying box body; 202. Drying box partition; 203. First filter screen; 204. Exhaust fan bracket; 205. Fan shock pad; 206. Drying box door; 207. First observation window; 208 , drying box door handle; 209, hinge; 3, heating pack assembly; 301, heating pack shell; 302, manual air valve; 303, second filter; 304, fiberglass block; 305, peep window; 306, wire management box; 307, sensor reserved port; 4, electrical box assembly; 401, electrical box body; 402, electrical box door; 403, second observation window; 404, fan; 405, through-wall plate mounting; 406, touch screen cover; 407 electrical box button mounting plate; 5, bracket assembly. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the utility model, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that according to the specific implementation situation, a better connection structure can be formed by adding or reducing connection accessories. For example, fixed connection / fixed installation can be selected according to the needs of screw connection, bolt connection, pin connection, key connection, bonding, mortise and tenon connection, welding, riveting and other methods. For example, detachable connection can be selected according to the needs of screw connection, bolt connection, threaded connection, snap connection, mortise and tenon connection, Velcro connection and other methods. The various technical features in the creation of the utility model can be combined interactively without conflicting with each other.

[0029] Reference Figure 1-4, an explosion-proof drying box for lithium battery experiments, comprising a drying box body assembly 2, a pipeline assembly 1, an electrical box assembly 4, a heating pack assembly 3 and a bracket assembly 5, the bracket assembly 5 is assembled and welded by channel steel, the electrical box assembly 4 and the drying box body assembly 2 are arranged on the top of the bracket assembly 5, the position of the heating pack assembly 3 is lower than the placement position of the drying box body assembly 2, the pipeline assembly 1 comprises a circulating air duct, a connecting air duct 103, a fresh air filter component 105, a fresh air duct 106, a circulating fan 104, an exhaust fan 108 and an exhaust air duct 107, specifically, the circulating air duct comprises a first circulating air duct 101 and a second circulating air duct 102. The drying box body assembly 2 comprises a drying box body 201, the first circulating air duct 101 is connected to the first air outlet of the drying box body 201, The first circulation air duct 101 is connected to the second circulation air duct 102, the circulation fan 104 is connected to the second circulation air duct 102, the connecting air duct 103 is connected to the air inlet of the heating pack assembly 3, the air outlet of the heating pack assembly 3 is connected to the air inlet of the drying box body 201, the fresh air filtering component 105 is arranged at the end of the fresh air duct 106, the fresh air duct 106 is connected to the second circulation air duct 102, the exhaust fan 108 is arranged on the upper part of the drying box body assembly 2, the exhaust air duct 108 is connected to the second air outlet of the drying box body 201, the exhaust fan 108 is connected to the exhaust air duct 107, and the exhaust fan 108 is in a normal ventilation state, so as to stabilize the NMP concentration value inside the drying box body 201. When the frequency of the circulation fan 104 is greater than the frequency of the exhaust fan 108 and the circulation air volume is greater than the exhaust air volume, the temperature inside the drying box will gradually rise to the set value, thereby achieving drying of the NMP slurry.

[0030] Reference Figure 5 and Figure 6The drying box body assembly 2 includes a drying box partition 202. A plurality of drying box partitions 202 are provided inside the drying box body 201. The first air outlet is provided with a first filter 203. The drying box partition 203 is used to prevent the beaker containing the slurry from being trapped. The drying box partition 203 is hollowed out. The hollowed-out setting allows the beaker to be hung inside the drying box body 201, which can increase the contact area between the beaker and the air and accelerate the drying. A first heat insulation layer is provided between the inner surface and the outer surface of the drying box body 201. An exhaust fan bracket 204 and a fan shock pad 205 are provided on the upper part of the drying box body 201. The exhaust fan bracket 204 is provided with the fan shock pad 205. The fan shock pad 205 can reduce the vibration generated when the exhaust fan is running. The drying box body assembly 2 also includes a drying box door 206, one end of the drying box door 206 is connected to the drying box body 201 through a hinge 209, and the other end is connected to the drying box body 201 through a drying box door handle 208. The drying box door handle 208 provides a guarantee for the fastening effect of the drying box door 206. Specifically, the drying box door 206 is provided with a first observation window, through which the situation inside the drying box body can be directly observed. The hinge 209 is a heavy-duty hinge, and the heavy-duty hinge is provided with a metal friction gasket, which can reduce metal friction.

[0031] Reference Figure 7The heating pack assembly 3 includes a heating pack shell 301, a manual air valve 302, a second filter 303 and a PTC heater. The heating pack shell 301 adopts a double-layer structure. A second heat insulation layer is provided between the inner surface and the outer surface of the heating pack shell 301. The specific second heat insulation layer is rock wool and gel, that is, the rock wool and gel are filled between the insulation layers of the heating pack shell 301. The rock wool and gel can achieve heat insulation and heat preservation, reduce heat loss, and improve the overall heating efficiency. The side wall of the heating pack shell 301 is provided with a filter mesh port, and the inner side of the heating pack shell 301 is provided with a limiting portion. One end of the second filter mesh 303 passes through the filter mesh port and is arranged above the limiting portion. The second filter mesh 303 is provided with a handle, and the handle is used to pull out the second filter mesh 303. The second filter mesh 303 can prevent foreign matter in the wind from entering the interior of the drying box body 201; the PTC heater is fixedly connected to the interior of the heating pack shell 301, and the PTC heater and the second filter mesh 303 are arranged on the same Horizontal plane, since the required working temperature of the drying box is 25-130℃, and the working range of the PTC heater is 0-300℃, the heater is selected as a PTC heater. At the same time, the slurry contains NMP solution, and the armored PTC heater with thermistor heating is selected to ensure the safety of heating; the manual air valve 302 is arranged inside the heating package shell 301, and the manual air valve 302 includes a control part and an air valve. The air valve is arranged inside the heating package shell 301, and the control part can control the opening of the air valve, thereby controlling the air volume. The heating package shell 301 is provided with a sensor reserved opening 307, and the sensor reserved opening 307 is provided with a sealing part. The NMP concentration detector can be installed through the sensor reserved opening 307, and the anemometer and other instrument devices that need to be added can also be installed. The end of the PTC heater is provided with a peep window 305 and a wire management box 306. The peep window 305 allows the working condition of the internal PTC heater to be directly seen. The wire management box 306 is provided at the end of the peep window 305 and is used for wiring the PTC heater. The heating package shell 301 is provided with a glass fiber block 304. The flame retardant property of the glass fiber can ensure that the circuit is not affected when a fault occurs. The glass fiber block 304 is provided with a copper bar, which is used for wiring the PTC heater.

[0032] Reference Figure 8The electrical box assembly 4 includes an electrical box body 401 and an electrical box door 402. The size of the electrical box body 401 is designed according to the size of the electrical components required for the drying box and the appearance size of the drying box body 201. The electrical box door 402 is provided with a second observation window 403. Specifically, the second observation window 403 is a transparent PCB board. The transparent PC board can ensure the sealing of the internal cavity of the electrical box assembly 4 while maintaining the function of the observation window; a through-wall plate mounting piece 405 is provided on the top of the electrical box body 401, and the through-wall plate mounting piece 405 is used for the bus to enter the interior of the electrical box body 401; fans 404 are provided on both sides of the electrical box body 401, and the relative positions of the two fans 404 are inconsistent, that is, one up and one down. The lower fan 404 is an air intake fan, and the upper fan 404 is an air supply fan, so that the two fans 404 can cooperate to take away the heat generated by the operation of the electrical components inside the electrical box body 401. The electrical box body is also provided with a touch screen and an electrical box button mounting plate 407, and the outside of the touch screen is provided with a touch screen cover 406, which can prevent the touch screen from being accidentally touched. At the same time, when the equipment is maintained, the touch screen cover 406 is linked with the padlock plate at the lower end of the cover to complete the mechanical locking of the touch screen.

[0033] The utility model provides an explosion-proof drying box for lithium battery experiments. By adding an independent exhaust fan on the top of the drying box box 201 to exhaust the drying box box 201, the normally open exhaust fan can effectively ensure the stability of the NMP concentration inside the drying box box 201. The NMP concentration detector can be installed on the sensor reserved port 307 to effectively monitor the NMP concentration content, and minimize the possibility of the box exploding due to excessive NMP concentration. The independently controlled exhaust fan can create a negative pressure environment when exhausting, ensuring that NMP gas will only enter the NMP recovery system of the factory through the explosion-proof exhaust fan, realizing the safe recovery of toxic gases, thereby achieving safe drying of the slurry. The placement platform of the heating pack component 3 is slightly lower than the placement platform of the drying box body component 2, thereby lowering the position of the air outlet of the heating pack shell 301. On the premise that the internal space of the bracket component 5 can accommodate the circulating fan 104, the air outlet is placed in the middle of the box as much as possible, and the circulating fan 104 runs at the rear to create a negative pressure environment for the second circulating air duct 102, and the hot air in the box and the ambient air outside the box are drawn into the circulating air duct for circulation. The air valve component attached to the fresh air filter component 105 is not allowed to be fully closed, and it is necessary to ensure that fresh air continues to enter. The box body is designed to prevent the exhaust fan 108 from continuously drawing air and causing a vacuum inside the box body. The circulating fan 104 continuously delivers air into the heating package shell 301. The air passes through the gap between the PTC heaters for heating during the upward process, and then passes through the second filter 303 to prevent foreign matter from entering the box body. The frequency of the exhaust fan 108 is reduced, and the frequency of the circulating fan 104 is always kept greater than that of the exhaust fan 108. When the circulating air volume is greater than the exhaust air volume, the temperature in the box body will gradually rise to the set value, thereby achieving the drying of the slurry.

[0034] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An explosion-proof drying box for lithium battery experiments, characterized in that: It includes a drying box body assembly, a pipeline assembly and a heating pack assembly, the pipeline assembly includes a circulating air duct, a connecting air duct, a fresh air duct, a circulating fan, an exhaust fan and an exhaust duct, the drying box body assembly includes a drying box body, the first air outlet of the drying box body is connected to the circulating air duct, the circulating air duct is connected to the air inlet of the circulating fan, the air outlet of the circulating fan is connected to the connecting air duct, the connecting air duct is connected to the air inlet of the heating pack assembly, the air outlet of the heating pack assembly is connected to the air inlet of the drying box body, the fresh air duct is connected to the circulating air duct, the exhaust fan is arranged on the upper part of the drying box body assembly, the exhaust duct is connected to the second air outlet of the drying box body, and the exhaust fan is connected to the exhaust duct.

2. The explosion-proof drying box for lithium battery experiments according to claim 1, characterized in that: The drying box body assembly comprises a drying box partition, a plurality of the drying box partitions are arranged inside the drying box body, and a first heat insulation layer is arranged between the inner surface and the outer surface of the drying box body.

3. The explosion-proof drying box for lithium battery experiments according to claim 2, characterized in that: The drying box body assembly further comprises a drying box door, one end of which is connected to the drying box body via a hinge, and a first observation window is provided on the drying box door.

4. The explosion-proof drying box for lithium battery experiments according to claim 1, characterized in that: An exhaust fan bracket is provided on the upper part of the drying box body, and the exhaust fan bracket is arranged on the upper part of the drying box body. The fan shock-absorbing pad is provided on the exhaust fan bracket.

5. The explosion-proof drying box for lithium battery experiments according to claim 1, characterized in that: The first air outlet is provided with a first filter.

6. The explosion-proof drying box for lithium battery experiments according to claim 1, characterized in that: The heating pack assembly includes a heating pack shell, a manual air valve, a second filter and a PTC heater. A second insulation layer is provided between the inner surface and the outer surface of the heating pack shell. The PTC heater is fixedly connected to the inside of the heating pack shell. The PTC heater and the second filter are arranged on the same horizontal plane. The manual air valve is arranged inside the heating pack shell. The manual air valve is used to adjust the air volume inside the heating pack shell.

7. The explosion-proof drying box for lithium battery experiments according to claim 6, characterized in that: The heating pack shell is provided with a sensor reserved opening, and the sensor reserved opening is provided with a sealing member.

8. The explosion-proof drying box for lithium battery experiments according to claim 6, characterized in that: The end of the PTC heater is provided with a peep window and a wire management box.

9. The explosion-proof drying box for lithium battery experiments according to claim 6, characterized in that: A glass fiber block is arranged on the heating package shell, a copper bar is arranged on the glass fiber block, and the copper bar is used for wiring the PTC heater.

10. The explosion-proof drying box for lithium battery experiments according to claim 1, characterized in that: It also includes an electric box assembly, which includes an electric box body and an electric box door. The electric box door is provided with a second observation window, and fans are provided on both sides of the electric box body.

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