CN216644847U

CN216644847U - Pole piece drying equipment

Info

Publication number: CN216644847U
Application number: CN202123270979.9U
Authority: CN
Inventors: 刘云皓; 阮启航; 高峰; 李文俊
Original assignee: Beijing WeLion New Energy Technology Co ltd
Current assignee: Huzhou Weilan Technology Co.,Ltd.
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-05-31
Anticipated expiration: 2031-12-23

Abstract

The utility model provides pole piece drying equipment which comprises a drying equipment main body, a gas pipeline system and a control device, wherein a gas inlet and a gas outlet are arranged on the drying equipment main body; wherein, gas in the drying equipment main part flows through the gas outlet, carries out purification treatment through purifier, flows into the drying equipment main part through the air inlet of drying equipment main part at last, realizes gas circulation and the cleaning in the drying equipment main part, does benefit to drying process stability, has improved the stoving effect greatly, makes the gas in the drying equipment main part can cyclic reuse, reaches and reduces the gas loss, practices thrift the cost, and can effectively prevent the beneficial effect of gaseous pollution external environment.

Description

Pole piece drying equipment

Technical Field

The utility model relates to the technical field of lithium battery pole piece drying equipment, in particular to pole piece drying equipment.

Background

With the development of the lithium ion battery industry, the application of the lithium ion battery is wider and wider, and the lithium ion battery attracts more and more attention as an important energy storage device. The lithium ion battery has excellent performances of high energy density, high working voltage, long cycle life and the like, so that the lithium ion battery is widely applied to the fields of 3C digital products, new energy automobiles, energy storage and the like.

The drying of the electrode pole piece of the lithium ion battery has great effect on the service life and the capacity of the lithium ion battery, the conventional method for drying the electrode is to stack the punched and formed electrodes together, directly put the electrodes into a constant-temperature oven, heat the electrodes to 90 to 130 ℃ after vacuumizing, and heat the electrodes at the constant temperature for 12 to 24 hours to complete the drying of the electrodes. Because in the drying process, moisture and additives in the pole piece can escape and evaporate at the same time, gas in the oven can be polluted to a certain degree, the drying process is unstable, and the drying effect of the pole piece is seriously influenced.

If the application number is: chinese patent CN201610880252.7 discloses a lithium ion battery electrode drying device, which comprises a constant temperature drying oven, wherein the top end of the constant temperature drying oven is provided with an inert gas inlet valve and a vacuum valve, a rotating shaft a and a rotating shaft B are arranged inside the constant temperature drying oven, an electrode roll is installed on the rotating shaft B, and another air electrode roll is installed on the rotating shaft a. A method of drying an electrode for a lithium ion battery, the method comprising the steps of: a. mounting the pole coil: installing the rolled pole roll on a rotating shaft B, installing the other empty pole roll on the rotating shaft A, pulling the outermost end of the pole roll to the empty pole roll clockwise, fixing the pole roll by using a high-temperature-resistant adhesive tape, and fixing the pole roll; b. vacuumizing: after the polar coil is installed, closing the door of the constant-temperature drying oven, closing the inert gas inlet valve, opening the vacuum valve, vacuumizing the interior of the constant-temperature drying oven, and closing the vacuum valve; c. filling inert dry gas: opening an inert dry gas inlet valve, filling dry inert gas into the constant-temperature drying box, and then closing the inert dry gas inlet valve; d. baking the electrodes: starting a heating switch of the constant-temperature drying oven, heating inert drying gas, raising the temperature in the oven to 90-130 ℃, and keeping the constant temperature; starting the rotating shaft A to drive the pole piece to rotate clockwise, wherein the speed of the pole piece is 1-5 m/min; after the pole roll is completely rolled from the rotating shaft B to the rotating shaft A, statically baking the pole roll for 60-240 minutes, and then enabling the rotating shaft A and the rotating shaft B to rotate anticlockwise, wherein the speed of the pole piece is 1-5 m/min; vacuumizing to 1-5Torr every 120-360 minutes, and then filling dry inert gas to the pressure of 500-600Torr in the chamber; e. cooling the electrode: and after the electrode is baked, closing the heating switch, and starting the circulating water cooling system to reduce the temperature in the constant-temperature drying oven to 25-60 ℃, so that the electrode is dried.

Another chinese patent with application number CN201410261853.0 discloses a pole piece drying device, the pole piece includes a current collector and an active material layer containing active material disposed on the surface of the current collector, the pole piece drying device includes: the unwinding mechanism is used for providing and conveying the pole piece to be dried and grounding a current collector of the pole piece to be dried; the winding mechanism is used for winding the dried pole piece and grounding a current collector of the dried pole piece; and the microwave baking mechanism is arranged between the unwinding mechanism and the winding mechanism. Wherein, microwave toasts the mechanism and includes: the metal box body is grounded and is provided with an inlet for the pole piece to be dried to enter and an outlet for the dried pole piece to come out; the insulating inner layer is attached to the inner wall of the metal box body; the microwave generator is arranged outside the metal box body and generates microwaves; the microwave waveguide tube is connected with the microwave generator and the metal box body, and guides microwaves generated by the microwave generator into the metal box body so as to bake the pole piece to be dried to obtain the dried pole piece; the microwave absorption assembly is arranged at the outlet of the metal box body or close to the outlet and is used for absorbing redundant microwaves; the air outlet is arranged on one side wall of the metal box body; one end of the hot air pipe is connected with the air outlet; the air inlet is arranged on one side wall of the metal box body and connected with the other end of the hot air pipe; and a dehydrator arranged on the hot gas pipe and positioned at the upstream of the gas inlet and used for absorbing the moisture of the gas in the hot gas pipe.

The above patents have the following disadvantages: because the pole piece roll is unfolded, dried and then wound, the working process is a continuous process, the cleanliness of gas in the drying cavity cannot be kept through simple discontinuous modes of exhausting, inflating, opening a bin door of equipment and the like, great process instability is caused, and the drying effect of the pole piece is further influenced. In addition, the existing pole piece drying equipment needs to fill and discharge a large amount of inert gas into the drying oven, which not only causes high drying cost, but also causes pollution to the external environment.

Therefore, a series of problems existing in the prior art, especially the problem that the drying effect of the pole piece is affected by the pollution of the air in the oven in the drying process, cannot be solved by the pole piece drying equipment and method in the prior art, and the pole piece drying equipment and method are a very headache problem for technicians in the field.

SUMMERY OF THE UTILITY MODEL

In view of the above, one of the objectives of the embodiments of the present invention is to provide a gas pipeline system for a drying apparatus main body, in which, through the gas pipeline system disposed outside the drying apparatus main body, gas in the drying apparatus main body flows out through a gas outlet of the drying apparatus main body, sequentially flows through a gas outlet pipe, and flows into the drying apparatus main body after passing through a purifying device to perform adsorption filtration and purification under the driving of a driving device (air pump), so as to realize gas circulation and cleaning treatment in the drying apparatus main body, the drying process is stable, the drying effect is greatly improved, the gas in the drying apparatus main body can be recycled, the gas loss is reduced, the cost is saved, and the beneficial effects of effectively preventing the gas in the oven from polluting the external environment are achieved, and the problem that the drying effect is affected by the pollution of the gas in the drying process in the prior art is solved, high drying cost and pollution to the external environment.

In order to achieve the above object, an embodiment of the present invention provides a pole piece drying apparatus, including a drying apparatus main body, on which an air inlet and an air outlet are arranged, and a gas pipeline system, connected to the drying apparatus main body, including a purification device for purifying gas in the drying apparatus main body;

and the gas in the drying equipment main body flows out from the gas outlet, is treated by the purification device and then flows into the drying equipment main body from the gas inlet.

Further, the gas piping system further comprises: one end of the air outlet pipe is connected with the air outlet, and the other end of the air outlet pipe is connected with the purifying device; the air inlet pipe is connected with the air inlet at one end and connected with the purifying device at the other end; the driving device is arranged on the gas outlet pipe or the gas inlet pipe and is used for driving the gas in the gas pipeline system to circularly flow; and the heat exchange device is used for exchanging heat between the air outlet pipe and the air inlet pipe.

Furthermore, a first inlet, a first outlet, a second inlet and a second outlet are arranged on the heat exchange device, the first inlet is connected with the gas outlet through the gas outlet pipe, the first outlet is connected with the purification device through the gas outlet pipe, the second inlet is connected with the purification device through the gas inlet pipe, and the second outlet is connected with the gas inlet through the gas inlet pipe.

Furthermore, at least one group of heat exchange units is arranged in the heat exchange device, each heat exchange unit comprises a first pipe and a second pipe, the first pipe is connected between the first inlet and the first outlet, and the second pipe is connected between the second inlet and the second outlet.

Further, the arrangement mode of the first pipe and the second pipe comprises at least one of the following three modes:

the first pipe and the second pipe are spirally wound together, and the outer walls of the first pipe and the second pipe are tightly attached;

the first tube and the second tube are concentric tubes;

and thirdly, the first pipe and the second pipe are fused together, and the fusion casting material is a heat conduction material.

Further, the gas pipeline system also comprises a cooling device for controlling the temperature of the pipeline gas.

Further, the cooling device is arranged between the first outlet and the purification device, and a temperature detector is arranged between the purification device and the cooling device.

Further, a heating mechanism is installed between the second outlet and the air inlet, and a temperature sensor is installed between the heating mechanism and the air inlet.

Furthermore, the purification device comprises a purification mechanism for purifying gas and a drying mechanism for reducing the water content of the gas, and the purification device is provided with a purification detector for detecting the cleanliness of the gas and a drying detector for detecting the water content of the gas.

Further, the purification mechanism comprises a filter component and a collection component, and both the filter component and the collection component can be reused.

The utility model has the beneficial effects that:

1. according to the utility model, through the gas pipeline system arranged on the drying equipment main body, gas in the drying equipment main body flows out through the gas outlet of the drying equipment main body, and flows into the drying equipment main body after being adsorbed, filtered and purified by the purification device of the gas pipeline system, so that gas circulation and cleaning treatment in the drying equipment main body are realized, the stability of the drying process is improved, the drying effect is greatly improved, the gas in the drying equipment main body can be recycled, the gas loss is reduced, the cost is saved, and the beneficial effects that the gas can be effectively prevented from polluting the external environment are achieved.

2. According to the utility model, the gas flowing out of the gas outlet of the drying equipment main body enters the heat exchange device through the first inlet of the heat exchange device, enters the purification device through the first outlet, and then enters the heat exchange device through the second inlet of the heat exchange device for heat energy conversion, and the exhaust gas in the drying equipment main body has higher heat, so that the heat energy conversion is realized through at least one heat exchange unit of the heat exchange device, the gas in the gas inlet pipe is heated through heat energy conduction, the utilization efficiency of heat energy is improved, the cost is further saved, and the beneficial effect of the drying process is improved.

3. According to the utility model, the purification detector is arranged on the outlet end of the purification mechanism, the drying detector is arranged on the outlet end of the drying mechanism, the cleanliness of the filtered and purified gas is detected and fed back and adjusted by the purification detector, the water content of the gas is detected and fed back and adjusted by the drying detector, the purity of the gas supplemented into the gas inlet pipe is ensured, the stability of a drying process is facilitated, and the drying effect is improved; furthermore, the filtering component and the collecting component in the purifying mechanism are parts which can be cleaned, dried or oxidized and reduced, thereby being beneficial to recycling; and after the water absorbing material in the drying mechanism reaches water absorption saturation, the water can be removed and discharged and reused again after being dried, so that the whole cost can be saved, the purity of the air in the air inlet pipe can be further guaranteed, the stability of the drying process is facilitated, and the drying effect is improved.

4. According to the utility model, the cooling device is arranged, so that the temperature of the gas in the gas outlet pipe is reduced, the driving device and the purifying device can be prevented from being burnt out, and the stability of the drying process is further ensured.

5. Through setting up heating mechanism and temperature sensor, detect gas temperature through temperature sensor to the heating power of feedback adjustment heating mechanism reaches the setting value, has ensured the stability of stoving technology, improves pole piece stoving effect.

Drawings

The following drawings are included to provide a further understanding of the utility model, are incorporated in and constitute a part of this application, and are provided for illustrative purposes only and are not intended to limit the scope of the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a pole piece drying apparatus in a first embodiment of the present application;

fig. 2 is a schematic structural diagram of a pole piece drying apparatus in the second embodiment of the present application;

FIG. 3 is a front view of a heat exchange unit structure in a heat exchange device in the third embodiment of the present application;

FIG. 4 is a right side view of FIG. 3;

fig. 5 is a schematic axial structure diagram of a heat exchange unit structure in a heat exchange device according to a fourth embodiment of the present application.

Reference numerals:

1. an air outlet pipe; 2. an air inlet pipe; 3. a purification device; 4. a drive device; 6. a cooling device; 7. a temperature detector; 8. a flow control sensor; 9. a heating mechanism; 10. a drying apparatus main body; 11. a temperature sensor; 101. an air outlet; 102. an air inlet; 103. a pressure sensor; 104. a winding mechanism; 105. an unwinding mechanism; 106. a deviation rectifying mechanism; 107. a drying heat source; 31. a purification mechanism; 32. a purification detector; 33. a drying mechanism; 34. a dry detector; 310. a collecting member; 311. a filter member; 331. a drying part; 50. a heat exchange unit; 51. a first inlet; 52. a first outlet; 53. a second outlet; 54. a second inlet; 501. a first tube; 502. a second tube; 61. a heat-dissipating medium; 62. a heat sink driver.

Detailed Description

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model.

It should be noted that, unless the directions indicated are individually defined, the directions of up, down, left, right, etc. referred to herein are based on the directions of up, down, left, right, etc. shown in fig. 1 of the embodiment of the present application, and if the specific posture is changed, the directional indication is changed accordingly. As used herein, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Further, in the various embodiments of the present disclosure, the same or similar reference numerals denote the same or similar components.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "connected" may be fixedly connected, detachably connected, or integral, unless otherwise expressly stated or limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the scope of the present invention as claimed.

Example one

As shown in fig. 1, the pole piece drying apparatus in this embodiment includes a drying apparatus main body 10, the drying apparatus main body 10 is provided with a pressure sensor 103, a belt speed detector, and an opening for charging or discharging gas, the opening is provided with a valve, and the drying apparatus main body 10 is provided with a winding mechanism 104, an unwinding mechanism 105, a deviation rectifying mechanism 106, and a drying heating source 107; wherein, also comprises a gas pipeline system which is arranged on the drying device main body 10; the two-end pipe orifices of the gas pipeline system are respectively connected to a gas outlet 101 and a gas inlet 102 of the drying equipment main body, a pipeline led out from the gas outlet 101 is a gas outlet pipe 1, a pipeline led out from the gas inlet 102 is a gas inlet pipe 2, a purifying device 3 used for purifying gas and a driving device 4 used for driving gas in the gas pipeline system to circularly flow are arranged on the pipeline, and the driving device 4 is a closed fan, preferably but not limited to an air extractor, so that the gas in the pipeline is not communicated with the outside, and the tightness of the whole pipeline is further ensured.

The purifying apparatus is a device for performing a treatment operation such as impurity removal and purification on a contaminated gas. The opening for charging or discharging gas is provided with a valve, that is, the device charging port and the waste gas discharging port of the drying device main body are the same opening, and the opening and closing of the opening are controlled by the valve.

By using the technical solution of this embodiment, first, the gas pipeline system and the drying apparatus main body in this embodiment are both sealed structures, and the used gas (such as inert gas) is filled into the drying apparatus main body through the opening of the drying apparatus main body, and the gas flows out through the gas outlet 101 of the drying apparatus main body, sequentially flows through the gas outlet pipe 1, the driving device 4, the purifying device 3 and the gas inlet pipe 2, and then flows into the drying apparatus main body through the gas inlet 102 of the drying apparatus main body, so as to form a sealed circulation loop. In the drying process, external gas is not required to be filled, the drying environment of specific gas is ensured, and the material reaction on the pole piece in the drying process is avoided, for example, the material reaction is carried out with oxygen in the air and the nitridation reaction is carried out with nitrogen in the air, so that the drying effect of the pole piece is greatly ensured and improved. Secondly, the enclosed gas can be controlled by negative pressure according to the requirement through a suction pump on the drying equipment main body, the boiling point of the evaporated substance is adjusted, and the drying effect is improved.

It is worth noting that in the embodiment, through the gas pipeline system arranged on the drying equipment main body, the gas in the drying equipment main body flows out through the gas outlet and sequentially flows through the gas outlet pipe, and flows into the drying equipment main body after being adsorbed, filtered and purified by the purifying device under the driving of the driving device (air extractor), so that the gas circulation and cleaning treatment in the drying equipment main body are realized, the stability of the drying process is ensured, and the drying effect is greatly improved; the gas in the drying equipment main body is purified by the purifying device of the gas pipeline system, so that the gas can be recycled, the gas consumption is reduced, the cost is saved, and the beneficial effect of effectively preventing the gas from polluting the external environment is achieved.

Example two

As shown in fig. 2, this embodiment is based on the first embodiment, and as a preferred implementation, the gas pipeline system in this embodiment further includes a heat exchange device, a cooling device 6, and a heating mechanism 9; wherein, heat transfer device installs between cooling device 6 and the drying equipment main part, and cooling device 6 installs between heat transfer device and drive arrangement 4, and heating mechanism 9 sets up on being close to drying equipment main part's intake pipe 2. That is to say, the gas in the drying equipment main body flows out through the gas outlet 101 of the drying equipment main body, sequentially flows through the gas outlet pipe 1, the heat exchange device and the cooling device 6, is driven by the driving device 4 (air extractor), flows through the purifying device 3 for gas purification, then flows through the heat exchange device for heat energy conversion, is heated by the heating mechanism 9 and adjusted to a preset temperature, and then enters the drying equipment main body to form a gas purification circulation loop, so that the cleanliness of the gas in the drying equipment main body is ensured.

It should be noted that the gas pipeline system in this embodiment also adopts necessary heat insulation measures, such as heat insulation of the outer wall of the cavity of the drying apparatus main body and the outer wall of the gas pipeline, which are all achieved by the conventional common techniques.

Specifically, as shown in fig. 2, the heat exchanger of the present embodiment is provided with an outlet pipe port and an inlet pipe port at two ends, the outlet pipe port includes a first inlet 51 for gas to flow into the heat exchanger and a second outlet 52 for gas to flow out of the heat exchanger, and the inlet pipe port includes a second inlet 54 for gas to flow into the heat exchanger and a second outlet 53 for gas to flow out of the heat exchanger. Further, the heat exchange device in this embodiment is provided with preferably but not limited to three sets of heat exchange units 50, and one set, two sets, four sets and more sets of heat exchange units 50 may be selected according to actual needs; furthermore, the heat exchanging unit 50 includes a first tube 501 and a second tube 502, two ends of the first tube 501 are respectively connected to the first inlet and the first outlet to realize the sealing connection between the heat exchanging device and the outlet pipe 1, and the second tube 502 is respectively connected to the second inlet and the second outlet to realize the sealing connection between the heat exchanging device and the inlet pipe 2.

Further, the purifying device 3 in the present embodiment includes a purifying mechanism 31 and a drying mechanism 33, and a purifying detector 32 for detecting the cleanliness of the gas is mounted on an outlet pipe of the purifying mechanism 31; a drying detector 34 for detecting the water content of the gas is arranged on an outlet pipeline of the drying mechanism 33; the drying mechanism 33 includes a drying unit 331 made of a water absorbing material that can be removed and dried for reuse after reaching water absorption saturation. Further, the purification mechanism 31 includes a filter part 311 and a collection part 310; the filtering component 311 is used for filtering harmful substances and dust in the gas, can be cleaned, dried or oxidized and reduced, is convenient to reuse, and is beneficial to saving the overall cost; the collecting component 310 is used for collecting harmful substances and dust filtered by the filtering component, and can move in and out of the purifying mechanism 31, so that the purifying mechanism is convenient to reuse, and the cost is saved.

Furthermore, in this embodiment, the temperature detector 7 and the flow control sensor 8 are installed on the outlet end pipeline of the cooling device 6, a plurality of sub-pipelines and a heat dissipation medium are installed in the cooling device, heat is conducted to the heat dissipation medium 61, and the heat dissipation medium 61 is driven to flow by the heat dissipation medium driver 62, so that cooling of the gas in the pipelines is realized. Specifically, a plurality of sub-pipelines in the cooling device are spiral, so that the heat dissipation area is increased, and the heat dissipation medium is preferably constant-temperature cooling water. Moreover, the temperature of the gas cooled in the pipeline is detected through the temperature detector 7, and then the gas is fed back to the cooling device through the flow control sensor 8 according to a set target temperature value, the flow speed or flow of a heat dissipation medium is adjusted, the cooling power is changed, and finally the gas cooling and constant temperature control in the pipeline are realized, so that the driving device 4 and the purifying device 3 in the pipeline are further prevented from being burnt out, the safety and stability of the system are ensured, and the stability of the drying process is further ensured.

In the present embodiment, the purification material used in the purification mechanism is preferably activated carbon, activated alumina, silica gel, molecular sieve, fiber filter layer, photocatalytic material, mineral-based air purification material, adsorption-photocatalytic material, low-temperature plasma-photocatalytic material, electrostatic adsorption mechanism, air purification membrane, or the like. The water-absorbing material is preferably calcium oxide, water-absorbing resin, silica gel desiccant, mineral desiccant, calcium chloride desiccant, alumina desiccant, biochemical desiccant, or the like; the filter element in this application refers to the purification material used in the purification mechanism. The heat radiating medium may be water, oil, gas, or the like.

In addition, a heating mechanism 9 is arranged on the water inlet pipe 2 between the heat exchange device and the drying equipment main body in the embodiment, a temperature sensor 11 is arranged at the outlet end of the heating mechanism 9, the temperature of the gas entering the drying equipment cavity is detected by the temperature sensor 11, and the heating power is fed back to the heating mechanism 9 to adjust to a set value, so that the purposes of stabilizing the drying process and improving the drying effect are achieved.

As a preferred embodiment, the first tube 501 and the second tube 502 of the heating unit 50 in this embodiment are spirally wound together, and the outer wall of the first tube 501 and the outer wall of the second tube 502 are tightly attached to each other, so as to ensure that the high-temperature gas in the gas outlet tube 1 is better conducted into the gas inlet tube, thereby achieving good heat energy conversion, recycling the high-energy heat of the gas discharged from the drying apparatus main body 10, improving the utilization efficiency of energy, and further achieving the beneficial effect of saving cost. Furthermore, after the first tube 501 and the second tube 502 are mutually spiral, heat-conducting silicone grease is coated at the contact gap, so that the heat exchange effect is further enhanced.

EXAMPLE III

Referring to fig. 3 and 4, the present embodiment is different from the second embodiment in that the first tube 501 and the second tube 502 of the heat exchange unit 50 in the present embodiment are concentric tubes. Preferably, the first pipe 501 and the second pipe 502 are respectively connected to an air outlet port and an air inlet port of the heat exchange device, so as to realize connection with an air outlet pipe and an air inlet pipe.

In the present embodiment, the inner pipe (the second pipe 502) of the concentric pipes is preferably made of copper or aluminum having good heat conductivity, and the outer pipe (the first pipe 501) is not limited to a material, and may be provided with a heat insulating material or coated or wrapped with a heat insulating material.

Example four

Referring to fig. 5, this embodiment is different from the second embodiment in that the first pipe 501 and the second pipe 502 of the heat exchange unit 50 in this embodiment are fused and cast together, and the fused and cast material is a heat conductive material, preferably copper or aluminum. Preferably, the first pipe 501 and the second pipe 502 are both in a U-shaped spiral structure, so that the heat conduction area is increased.

EXAMPLE five

With reference to fig. 1 and fig. 2, the present embodiment provides a gas pipeline, which includes a gas pipeline system on the pole piece drying apparatus according to any one of the above embodiments.

While the above description shows and describes the preferred embodiments of the application, it is to be understood, as noted above, that the application is not limited to the forms disclosed herein, but is not intended to be exhaustive of other embodiments, and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the subject matter disclosed above, as determined by the teachings or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.

Claims

1. A pole piece drying device comprises a drying device main body, wherein an air inlet and an air outlet are formed in the drying device main body, and the pole piece drying device is characterized by further comprising a gas pipeline system, the gas pipeline system is connected to the drying device main body, and the gas pipeline system comprises a purification device used for purifying gas in the drying device main body;

and the gas in the drying equipment main body flows out from the gas outlet, is treated by the purifying device and then flows into the drying equipment main body from the gas inlet.

2. The pole piece drying apparatus of claim 1, wherein the gas piping system further comprises:

one end of the air outlet pipe is connected with the air outlet, and the other end of the air outlet pipe is connected with the purifying device;

the air inlet pipe is connected with the air inlet at one end and connected with the purifying device at the other end;

the driving device is arranged on the gas outlet pipe or the gas inlet pipe and is used for driving the gas in the gas pipeline system to circularly flow;

and the heat exchange device is used for exchanging heat between the air outlet pipe and the air inlet pipe.

3. The pole piece drying equipment of claim 2, wherein the heat exchanging device is provided with a first inlet, a first outlet, a second inlet and a second outlet, the first inlet is connected with the air outlet through the air outlet pipe, the first outlet is connected with the purifying device through the air outlet pipe, the second inlet is connected with the purifying device through the air inlet pipe, and the second outlet is connected with the air inlet through the air inlet pipe.

4. The pole piece drying equipment of claim 3, wherein at least one set of heat exchange units is arranged in the heat exchange device, the heat exchange units comprise a first pipe and a second pipe, the first pipe is connected between the first inlet and the first outlet, and the second pipe is connected between the second inlet and the second outlet.

5. The pole piece drying apparatus of claim 4, wherein the first and second pipes are arranged in a manner including at least one of:

the first tube and the second tube are concentric tubes;

and the first pipe and the second pipe are fused and cast together, and the fusion casting material is a heat conduction material.

6. The pole piece drying apparatus of claim 3, wherein the gas duct system further comprises a cooling device for controlling the temperature of the duct gas.

7. The pole piece drying apparatus of claim 6, wherein the cooling device is disposed between the first outlet and the purifying device, and a temperature detector is disposed between the purifying device and the cooling device.

8. The pole piece drying apparatus of claim 3, wherein a heating mechanism is mounted between the second outlet and the air inlet, and a temperature sensor is mounted between the heating mechanism and the air inlet.

9. The pole piece drying equipment as claimed in claim 1, wherein the purifying device comprises a purifying mechanism for purifying gas and a drying mechanism for reducing water content of the gas, and the purifying device is provided with a purifying detector for detecting gas cleanliness and a drying detector for detecting water content of the gas.

10. The pole piece drying apparatus of claim 9, wherein the purifying mechanism comprises a filter component and a collecting component, both of which are reusable.