CN117139104A

CN117139104A - Drying system, battery production equipment and pole piece coating and drying method

Info

Publication number: CN117139104A
Application number: CN202311438826.1A
Authority: CN
Inventors: 莫轲; 葛波; 赵一亮; 朱韦业; 程旺
Original assignee: Jiangsu Contemporary Amperex Technology Ltd
Current assignee: Jiangsu Contemporary Amperex Technology Ltd
Priority date: 2023-11-01
Filing date: 2023-11-01
Publication date: 2023-12-01

Abstract

The application relates to the technical field of batteries, in particular to a drying system, battery production equipment and a pole piece coating and drying method. The drying system comprises a humidity adjusting device, a heating device and a drying device, wherein the humidity adjusting device is used for adjusting the humidity of the gas; the heating device is used for heating the gas processed by the humidity adjusting device, the drying device is used for receiving the gas heated by the heating device, the gas received by the drying device is used for drying the film coated by the pole piece, and the temperature and the humidity of the gas received by the drying device are both in the corresponding preset range. According to the drying system, when the drying device dries the diaphragm coated by the pole piece, the temperature and the humidity of gas entering the drying device are in the corresponding preset ranges, so that the influence of the temperature and the humidity change of the environment on the temperature and the humidity in the drying device is reduced, and the cracking probability of the diaphragm coated by the pole piece is reduced.

Description

Drying system, battery production equipment and pole piece coating and drying method

Technical Field

The application relates to the technical field of batteries, in particular to a drying system, battery production equipment and a pole piece coating and drying method.

Background

This section provides merely background information related to the present disclosure and is not necessarily prior art.

In the manufacturing process of the power battery, the pole piece coating is a key process. The pole piece coating is to uniformly coat the negative pole slurry or the anode slurry on the base material in the coating modes of extrusion coating, transfer coating, spraying and the like, and simultaneously dry the base material in an oven under the high-temperature environment of negative pressure to remove the solvent in the slurry, so as to obtain solid powder which is adhered on the base material.

When the temperature and humidity of the environment change, the situation that the membrane coated by the pole piece is cracked easily occurs.

Disclosure of Invention

In view of the above problems, the application provides a drying system, a battery pack and electric equipment, which solve the problem that a diaphragm coated by a pole piece in a drying device is easy to crack after the temperature and humidity of the environment change.

In a first aspect of the present application, a drying system is provided, the drying system comprising:

the humidity adjusting device is used for adjusting the humidity of the gas;

the heating device is used for heating the gas processed by the humidity adjusting device;

and the drying device is used for receiving the gas heated by the heating device, and the gas received by the drying device is used for drying the film coated by the pole piece, wherein the temperature and the humidity of the gas received by the drying device are both in the corresponding preset range.

According to the drying system, the humidity adjusting device and the heating device are arranged to respectively adjust the humidity and the temperature of the gas entering the drying device, so that the temperature and the humidity of the gas received by the drying device are in the corresponding preset ranges, and when the film coated by the pole piece is dried, the temperature and the humidity of the gas entering the drying device are in the corresponding preset ranges, the influence of the temperature and the humidity change of the environment on the temperature and the humidity in the drying device is reduced, and the cracking probability of the film coated by the pole piece is reduced.

The drying system according to the application has the following additional technical features.

In some embodiments of the application, the heating device comprises a heat exchanger for cooling at least part of the gas discharged from the drying device. According to the embodiment of the application, the heat exchanger is used for cooling at least part of the gas discharged by the drying device, so that the heat exchanger can cool at least part of the gas discharged by the drying device, heat other gases entering the heating device, and the energy consumption of the drying system is reduced.

In some embodiments of the application, the humidity regulating apparatus comprises a humidifier for humidifying the gas, the humidifier being connected to an inlet line for providing the gas into the humidifier, wherein the inlet line is provided with a first valve and the amount of the gas entering the humidifier is controlled by the first valve. According to the embodiment of the application, the humidifier for humidifying the gas is arranged, so that the gas entering on the gas inlet pipeline can be humidified, and the humidity of the gas is improved; further, by providing the first valve on the air intake pipe, the amount of the gas that enters the humidifier can be controlled by the first valve.

In some embodiments of the application, at least a portion of the cooled gas exiting the heating device is delivered to a humidifier. According to the embodiment of the application, at least part of the cooled gas exhausted by the heating device is added and conveyed to the humidifier, so that the gas can be recycled, the air supplementing temperature in the drying device is improved, and the heating energy consumption in the drying device is reduced.

In some embodiments of the present application, the humidity control apparatus further includes a dehumidifier including an adsorption area and a desorption area, the gas humidified by the humidifier is transferred to the heating apparatus after passing through the adsorption area, and at least part of the gas discharged from the drying apparatus is discharged through the desorption area. According to the embodiment of the application, the dehumidifier comprising the adsorption area and the analysis area is arranged, so that the air humidified by the humidifier can be conveyed into the heating device after being subjected to humidity adjustment by the dehumidifier, and at least part of the air exhausted by the drying device is exhausted after being analyzed, so that the humidity in the drying device can be adjusted, and the humidity of the drying device is maintained in a preset range.

In some embodiments of the present application, the air inlet pipe is further provided with a pressurizing member, and the pressurizing member is used for pressurizing the air and providing the air to the humidifier. According to the embodiment of the application, the pressurizing piece is arranged on the air inlet pipeline, so that the air is pressurized and then supplied to the humidifier, and the efficiency of entering the humidifier by the air can be improved.

In some embodiments of the application, the plenum is located downstream of the first valve in the direction of gas flow within the intake conduit. According to the embodiment of the application, the pressurizing piece is arranged on the downstream side of the first valve, so that after the gas enters from the first valve, the flow rate of the gas is improved, and the efficiency of the gas entering the humidifier is improved.

In some embodiments of the present application, the heating device is connected to a first exhaust pipe, and the first exhaust pipe is used for exhausting cooled gas, where the first exhaust pipe is communicated with the air inlet pipe, and a connection position of the first exhaust pipe and the air inlet pipe is located on a pipe between the pressurizing member and the first valve. According to the embodiment of the application, the first exhaust pipeline is arranged and is communicated with the air inlet pipeline, and the connection position of the first exhaust pipeline and the air inlet pipeline is positioned on the pipeline between the pressurizing piece and the first valve, so that at least part of gas discharged by the heating device can be recycled through the first exhaust pipeline and then enters the humidifier again for use.

In some embodiments of the application, a first exhaust element is provided on the first exhaust line. According to the embodiment of the application, the first exhaust part is arranged on the first exhaust pipeline, so that the exhaust can be realized through the first exhaust part, and the exhaust efficiency is accelerated.

In some embodiments of the application, the first exhaust line is connected to the intake line by a manifold, wherein the manifold is provided with a second valve. According to the embodiment of the application, the manifold is arranged, and the second valve is arranged on the manifold, so that the flow direction of the gas in the first exhaust pipeline can be realized through the second valve, and the amount of the gas entering the manifold is controlled, so that the amount of the recycled gas is regulated.

In some embodiments of the application, the junction of the manifold and the first exhaust conduit is located downstream of the first exhaust component in the direction of gas flow within the first exhaust conduit. By locating the junction of the manifold and the first exhaust line on the downstream side of the first exhaust element, embodiments of the present application can regulate the flow rate of gas within the manifold through the first exhaust element.

In some embodiments of the present application, the drying system further comprises a second exhaust line for receiving the gas exhausted from the drying device, the gas in the second exhaust line flowing through the resolving area. According to the embodiment of the application, the second exhaust pipeline for receiving the gas exhausted by the drying device is arranged, and the gas in the second exhaust pipeline flows through the analysis area, so that the analysis of the dehumidifier can be realized through the second exhaust pipeline, the additional consumption of energy is not needed, the full utilization of the gas exhausted by the drying device is realized, and the effects of energy conservation and consumption reduction are achieved.

In some embodiments of the present application, the second exhaust pipe is provided with an exhaust valve, and the gas in the second exhaust pipe flows through the exhaust valve and then enters the analysis area. By providing the exhaust valve on the second exhaust pipe, the embodiment of the application can control the amount of the gas entering the analysis zone through the exhaust valve.

In some embodiments of the present application, a second exhaust member is provided on the second exhaust pipe, and the gas flowing out of the analysis region is discharged after passing through the second exhaust member. By providing the second exhaust element on the second exhaust pipe, the embodiment of the application can adjust the exhaust speed in the second exhaust pipe through the second exhaust element.

In some embodiments of the present application, the drying system further comprises a first temperature sensor and a first humidity sensor, and the first temperature sensor and/or the first humidity sensor are/is provided on a pipeline connecting the adsorption area and the heating device. According to the embodiment of the application, the first temperature sensor and/or the first humidity sensor are/is arranged on the pipeline connecting the adsorption area and the heating device, so that the detection of the temperature and/or the humidity in the pipeline can be realized.

In some embodiments of the present application, the drying system further comprises a second temperature sensor and a second humidity sensor, and the second temperature sensor and/or the second humidity sensor are/is provided on a pipeline connecting the heating device and the drying device. According to the embodiment of the application, the second temperature sensor and/or the second humidity sensor are/is arranged on the pipeline connecting the heating device and the drying device, so that the temperature and/or the humidity in the pipeline can be detected.

In some embodiments of the present application, the drying system further comprises a first temperature sensor and a first humidity sensor, and the first temperature sensor and/or the first humidity sensor are/is arranged on a pipeline connecting the heating device and the humidifier. According to the embodiment of the application, the first temperature sensor and/or the first humidity sensor are/is arranged on the pipeline connecting the heating device and the humidifier, so that the temperature and/or the humidity in the pipeline can be detected.

In some embodiments of the present application, the drying system further comprises a second temperature sensor and a second humidity sensor, and the drying device delivers the dried gas to the heating device through a first pipeline, and the second temperature sensor and/or the second humidity sensor are/is provided on the first pipeline. According to the embodiment of the application, the second temperature sensor and/or the second humidity sensor are/is arranged on the first pipeline, so that the detection of the temperature and/or the humidity in the first pipeline can be realized.

In some embodiments of the present application, the drying system further includes a surface cooler disposed on the air intake pipe. According to the embodiment of the application, the surface cooler is arranged on the air inlet pipeline, so that the humidity of fresh air in the air inlet pipeline can be regulated through the surface cooler.

In some embodiments of the application, the drying device is in direct communication with the first exhaust line. According to the embodiment of the application, the drying device is directly communicated with the first exhaust pipeline, so that the gas exhausted by the drying device can be directly conveyed into the first exhaust pipeline, and the temperature of the gas in the first exhaust pipeline is increased.

In some embodiments of the application, the drying device and the heating device are in communication via a second conduit, and a filter is disposed on the second conduit. According to the embodiment of the application, the drying device is communicated with the heating device through the second pipeline, and the filter is arranged on the second pipeline, so that the gas entering the drying device can be filtered.

A second aspect of the present application proposes a battery production apparatus including a drying system as mentioned in the above embodiments.

A third aspect of the present application provides a pole piece coating and drying method, where the drying system mentioned in the above embodiment is applied to a pole piece coating and drying method, including:

acquiring a first humidity and a first temperature of the gas entering the heating device;

acquiring a second humidity of the exhaust gas of the drying device;

The first humidity, the first temperature and the second humidity are respectively regulated to be in corresponding preset ranges;

drying the pole piece coated membrane placed in the drying device.

The pole piece coating and drying method has the following additional technical characteristics.

In some embodiments of the present application, adjusting the first humidity, the first temperature, and the second humidity to be within respective preset ranges specifically includes:

adjusting the proportion of outdoor fresh air in the air entering the heating device and exhaust air of the drying system to enable the first temperature to be in a first preset range and enable the first humidity to be in a second preset range;

and adjusting the opening time of the humidity adjusting device to enable the second humidity to be in a third preset range.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

Fig. 1 is a schematic structural diagram of a drying system according to some embodiments of the present application;

fig. 2 is a schematic structural diagram of another drying system according to some embodiments of the present application;

fig. 3 is a schematic structural diagram of another drying system according to some embodiments of the present application.

The reference numerals are as follows:

10. a drying system;

11. a humidity adjusting device; 111. a humidifier; 112. a dehumidifier; 1121. an adsorption zone; 1122. an analysis area;

12. a heat exchanger;

13. a drying device;

14. an air intake line; 141. a first valve; 142. a pressurizing member;

15. a first exhaust line; 151. a second valve; 152. a manifold; 153. a first exhaust member;

16. a second exhaust line; 161. an exhaust valve; 162. a second exhaust member;

171. a first temperature sensor; 172. a first humidity sensor; 173. a second temperature sensor; 174. a second humidity sensor; 175. a third temperature sensor; 176. a fourth temperature sensor;

18. a filter;

19. a surface cooler;

101. a first pipeline; 102. a second pipeline; 103. and a third pipeline.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. refer to the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

When the temperature and humidity of the environment change, the situation that the membrane coated by the pole piece is cracked easily occurs. In order to solve the problem, an embodiment of the application provides a drying system, wherein the drying system comprises a humidity adjusting device and a heating device, and the humidity and the temperature of gas entering the drying device are notified, so that when the drying device dries a pole piece coated membrane, the temperature and the humidity of the gas entering the drying device are kept within corresponding preset ranges, the influence of the temperature and the humidity of the environment on the temperature and the humidity in the drying device is reduced, and the cracking probability of the pole piece coated membrane is reduced.

The drying system in the embodiment of the application can be applied to a scene of drying the membrane coated by the pole piece, such as drying the membrane coated by the anode or drying the membrane coated by the cathode.

The structure of the drying system according to the present application will be described with reference to the accompanying drawings.

The first aspect of the present application proposes a drying system 10, as shown in fig. 1, the drying system 10 includes a humidity adjusting device 11, a heating device, and a drying device 13, the humidity adjusting device 11 is used for adjusting the humidity of the gas; the heating device is used for heating the gas processed by the humidity adjusting device 11; the drying device 13 is used for receiving the gas heated by the heating device, and when the gas received by the drying device 13 is used for drying the film coated by the pole piece, the temperature and the humidity of the gas received by the drying device 13 are both in the corresponding preset range.

The humidity control device 11 may be a humidifier 111, a dehumidifier 112, or the like, and humidifies or dehumidifies the humidity of the gas. The heating device mentioned here may be a heat exchanger or other heating products, and the drying device 13 mentioned here refers to a device for drying a film coated with a polar sheet, which may be a single-layer drying device or a multi-layer simultaneous drying device.

According to the drying system 10, the humidity adjusting device 11 and the heating device are arranged to respectively adjust the humidity and the temperature of the gas entering the drying device 13, so that when the drying device 13 dries the film coated by the pole piece, the temperature and the humidity of the gas received by the drying device 13 are kept within the corresponding preset ranges, the influence of the temperature and the humidity in the drying device 13 caused by the temperature and the humidity change of the environment is reduced, and the cracking probability of the film coated by the pole piece is reduced.

The humidity control device 11 has a control and storage function, and can control the humidity by comparing the received actual data of the humidity with a preset range of the humidity. The heating device can compare the received actual data of the temperature with the preset range of the temperature, and adjust the temperature. Of course, the functions of the humidity control device 11 and the heating device can also be integrated on the electric control part in the drying system, so that the automatic adjustment of the temperature and the humidity is realized.

Optionally, as shown in fig. 1, the heating device includes a heat exchanger 12, and the heat exchanger 12 is used for cooling at least part of the gas discharged from the drying device 13. The heat exchanger 12 can exchange heat between gas and gas, at least part of the gas discharged by the drying device 13 is cooled by the heat exchanger 12, and the air inlet passing through the heat exchanger 12 is heated, so that the energy can be fully utilized, and the energy consumption of the drying system 10 is reduced.

According to the embodiment of the application, the heating device comprises the heat exchanger 12, and the heat exchanger 12 is used for cooling at least part of the gas discharged by the drying device 13, so that the heat exchanger 12 can cool at least part of the gas discharged by the drying device 13, and raise the temperature of other gases entering the heating device, thereby reducing the energy consumption of the drying system 10.

Alternatively, as shown in fig. 1, the humidity control apparatus 11 includes a humidifier 111, the humidifier 111 is used for humidifying the gas, the humidifier 111 is connected with an air inlet pipe 14, the air inlet pipe 14 is used for providing the gas into the humidifier 111, wherein a first valve 141 is arranged on the air inlet pipe 14, and the amount of the gas entering the humidifier 111 is controlled through the first valve 141.

The first valve 141 may be a product such as an electric valve, and the flow rate of the gas may be adjusted by controlling the opening degree of the first valve 141.

According to the embodiment of the application, the humidifier 111 for humidifying the gas is arranged, so that the gas entering on the air inlet pipeline 14 can be humidified, and the humidity of the gas is improved; further, by providing the first valve 141 on the intake pipe 14, the amount of gas that enters the humidifier 111 can be controlled by the first valve 141.

Optionally, as shown in fig. 1, at least part of the cooled gas discharged by the heating device is delivered to the humidifier 111, so as to realize recycling of the gas. Other parts in the cooled gas can be directly released in an outward discharging mode.

According to the embodiment of the application, at least part of the cooled gas discharged by the heating device is added and conveyed to the humidifier 111, so that the gas can be recycled, the air supplementing temperature in the drying device 13 is increased, and the heating energy consumption in the drying device 13 is reduced.

Optionally, as shown in fig. 1, the humidity adjusting device 11 further includes a dehumidifier 112, the dehumidifier 112 includes an adsorption area 1121 and a desorption area 1122, the gas humidified by the humidifier 111 is conveyed to the heating device after passing through the adsorption area 1121, and at least part of the gas discharged from the drying device 13 is discharged through the desorption area 1122.

The adsorption zone 1121 and the desorption zone 1122 are two parts of the dehumidifier 112, and the adsorption zone 1121 and the desorption zone 1122 are mutually independent, and the adsorption zone 1121 adsorbs the humidity in the gas and reduces the humidity of the gas; the analysis region 1122 analyzes the humidity in the gas and increases the humidity of the gas.

By providing the dehumidifier 112 including the adsorption zone 1121 and the analysis zone 1122, the embodiment of the application can adjust the humidity of the gas humidified by the humidifier 111 by the dehumidifier 112, then send the gas into the heating device, and analyze and discharge at least part of the gas discharged from the drying device 13, then adjust the humidity in the drying device 13, so that the humidity of the drying device 13 is maintained within a preset range.

Optionally, as shown in fig. 1, a pressurizing element 142 is further disposed on the air inlet pipe 14, and the pressurizing element 142 is used for pressurizing the gas and providing the gas to the humidifier 111. The plenum 142 may be a blower or booster pump or the like to allow gas to enter the intake line 14.

In the embodiment of the application, the pressurizing piece 142 is arranged on the air inlet pipeline 14 to pressurize the air and then supply the air to the humidifier 111, so that the efficiency of entering the air into the humidifier 111 can be improved.

Alternatively, in fig. 1, the pressurizing member 142 is located on the downstream side of the first valve 141 in the gas flow direction in the intake pipe 14. The direction of the flow of the air in the air inlet pipeline 14 is along the arrow direction in fig. 1, and the fresh air enters the air inlet pipeline 14 from the right side, moves leftwards, and then sequentially passes through the first valve 141 and the pressurizing element 142 and enters the humidifier 111.

By disposing the pressurizing member 142 on the downstream side of the first valve 141, the embodiment of the present application can increase the flow rate of the gas after the gas enters from the first valve 141, and increase the efficiency of the gas entering the humidifier 111.

Optionally, as shown in fig. 1, the heating device is connected with a first exhaust pipe 15, where the first exhaust pipe 15 is used for exhausting cooled gas, the first exhaust pipe 15 is communicated with the air inlet pipe 14, and a connection position of the first exhaust pipe 15 and the air inlet pipe 14 is set between the pressurizing part 142 and the first valve 141.

In the embodiment of the application, by arranging the first exhaust pipeline 15 and communicating the first exhaust pipeline 15 with the air inlet pipeline 14, and arranging the connection position of the first exhaust pipeline 15 and the air inlet pipeline 14 between the pressurizing piece 142 and the first valve 141, at least part of the gas discharged by the heating device can be recycled through the first exhaust pipeline 15 and then enter the humidifier 111 again for use.

Optionally, as shown in fig. 1, a first exhaust member 153 is provided on the first exhaust pipe 15. The first exhaust member 153 may be a blower, a booster pump, or the like.

By providing the first exhaust member 153 on the first exhaust pipeline 15, the embodiment of the application can realize the exhaust through the first exhaust member 153, thereby accelerating the exhaust efficiency.

Alternatively, as shown in fig. 1, the first exhaust line 15 is connected to the intake line 14 through a manifold 152, wherein a second valve 151 is provided on the manifold 152. The two ends of the manifold 152 are respectively connected with the first exhaust pipeline 15 and the air inlet pipeline 14, so that at least part of the air in the first exhaust pipeline 15 can be conveyed into the air inlet pipeline 14 through the manifold 152, and the recycling of at least part of the air in the first exhaust pipeline 15 is realized.

By providing the manifold 152 and providing the second valve 151 on the manifold 152, the embodiment of the present application can realize the flow direction of the gas in the first exhaust pipeline 15 through the second valve 151, and control the amount of the gas entering the manifold 152, thereby adjusting the amount of the gas to be recycled.

Alternatively, as shown in fig. 1, the junction of the manifold 152 and the first exhaust pipe 15 is located on the downstream side of the first exhaust member 153 in the gas flow direction in the first exhaust pipe 15. That is, the gas in the first exhaust line 15 passes through the first exhaust member 153 before entering the manifold 152.

By locating the junction of the manifold 152 and the first exhaust pipe 15 on the downstream side of the first exhaust member 153, the embodiment of the present application can adjust the flow rate of the gas in the manifold 152 by the first exhaust member 153.

Optionally, as shown in fig. 1, the drying system 10 further includes a second exhaust pipe 16, where the second exhaust pipe 16 is used to receive the gas exhausted from the drying device 13, and the gas in the second exhaust pipe 16 flows through the parsing area 1122. The gas in the second exhaust line 16 flows through the analysis region 1122 and is exhausted.

According to the embodiment of the application, the second exhaust pipeline 16 for receiving the gas exhausted by the drying device 13 is arranged, and the gas in the second exhaust pipeline 16 flows through the analysis region 1122, so that the analysis of the dehumidifier 112 can be realized through the second exhaust pipeline 16, other energy consumption is not required to be additionally consumed, the full utilization of the gas exhausted by the drying device 13 is realized, and the effects of energy conservation and consumption reduction are achieved.

Optionally, as shown in fig. 1, an exhaust valve 161 is disposed on the second exhaust pipeline 16, and the gas in the second exhaust pipeline 16 flows through the exhaust valve 161 and then enters the analysis zone 1122. The exhaust valve 161 is a valve for controlling the flow rate of exhaust gas, and may regulate the flow of gas in the second exhaust line 16.

By providing the vent valve 161 in the second vent line 16, embodiments of the present application can control the amount of gas entering the analysis zone 1122 via the vent valve 161.

Optionally, as shown in fig. 1, a second exhaust member 162 is disposed on the second exhaust pipeline 16, and the gas flowing out of the analysis region 1122 is exhausted after passing through the second exhaust member 162. The second exhaust member 162 may be a fan, a booster pump, or the like, and may conveniently and rapidly exhaust the gas in the second exhaust line 16.

By providing the second exhaust member 162 on the second exhaust pipe 16 in the embodiment of the present application, the exhaust speed in the second exhaust pipe 16 can be adjusted by the second exhaust member 162.

Optionally, as shown in fig. 1, the drying system 10 further includes a first temperature sensor 171 and a first humidity sensor 172, and the first temperature sensor 171 and/or the first humidity sensor 172 are/is disposed on a pipeline connecting the adsorption area 1121 and the heating device.

Here, the first temperature sensor 171 and/or the first humidity sensor 172 are provided on the line connecting the adsorption area 1121 and the heating device, not on the line connecting the heating device and the drying device 13, on the one hand, considering that the ambient temperature at the installation site is not too high, and therefore, the first temperature sensor 171 and/or the first humidity sensor 172 may be provided on the line connecting the adsorption area 1121 and the heating device, or the humidity and the temperature of the gas entering the drying device 13 may be indirectly reflected; on the other hand, the detection data of the first temperature sensor 171 and/or the first humidity sensor 172 are sent to the electronic control component of the drying system, and the electronic control component adjusts the temperature according to the received actual data of the temperature and the preset range of the temperature, or adjusts the temperature and the humidity according to the received actual data of the humidity and the preset range of the humidity, so that the temperature and the humidity of the gas in the drying device 13 are both in the corresponding preset ranges.

The embodiment of the present application can realize the detection of the temperature and/or humidity in the pipeline by providing the first temperature sensor 171 and/or the first humidity sensor 172 on the pipeline connecting the adsorption zone 1121 and the heating device.

Optionally, as shown in fig. 1, the drying system 10 further includes a second temperature sensor 173 and a second humidity sensor 174, and the second temperature sensor 173 and/or the second humidity sensor 174 are/is disposed on a pipeline connecting the heating device and the drying device 13.

The embodiment of the present application can realize the detection of the temperature and/or humidity in the pipeline by providing the second temperature sensor 173 and/or the second humidity sensor 174 on the pipeline connecting the heating device and the drying device 13.

The first temperature sensor 171, the first humidity sensor 172, the second temperature sensor 173, and the second humidity sensor 174 are electrically connected to the control unit of the drying system 10, and may send detected data to the control unit of the drying system 10, and the control unit of the drying system 10 compares the detected actual data with the stored preset range, and controls the humidity adjusting device 11 to adjust the humidity, or controls the heating device to adjust the temperature, and automatically adjusts the temperature and the humidity of the gas entering the drying device 13, thereby reducing the process of tuning.

In the drying system 10 of fig. 1, it is required to keep the measured value T1 of the first temperature sensor 171 and the measured value RH1 of the first humidity sensor 172 stable, that is, the measured value T1 of the first temperature sensor 171 and the measured value RH1 of the first humidity sensor 172 are within respective preset ranges, so that it can be considered that the temperature and humidity of the air entering the drying device 13 are constant. When the measured value T1 of the first temperature sensor 171 is lower than the preset range, the air volume in the first exhaust pipe 15 can be increased by increasing the opening of the second valve 151, so that the proportion of the exhaust air volume in the intake pipe 14 can be increased, and the temperature of the intake air can be increased. When the measured value T1 of the first temperature sensor 171 is higher than the preset range, the air volume in the first exhaust pipe 15 can be reduced by reducing the opening of the second valve 151, thereby reducing the proportion of the exhaust air volume in the intake pipe 14 and reducing the temperature of the intake air.

Here, the temperature of the intake air is a ratio between the amount of exhaust air and the amount of fresh air in the intake duct 14, and the temperature of the exhaust air is generally higher than the temperature of the fresh air, and therefore, the control of the measured value T1 of the first temperature sensor 171 can be achieved by adjusting the ratio between the amount of exhaust air and the amount of fresh air in the intake duct 14.

Accordingly, when the measured value RH1 of the first humidity sensor 172 is not within the preset range, the air volume passing through the analysis area 1122 can be changed to adjust the measured value RH1 of the first humidity sensor 172, for example, when RH1 is lower than the preset range, the opening of the exhaust valve 161 can be reduced, the air volume passing through the analysis area 1122 can be reduced, and the value of RH1 can be increased. When RH1 is higher than the preset range, the opening of the exhaust valve 161 may be increased, so as to increase the air volume passing through the analysis region 1122, and reduce the value of RH1, so that both T1 and RH1 may be within the corresponding preset range.

Alternatively, as shown in fig. 2, a first temperature sensor 171 and a first humidity sensor 172 are provided on a pipe connecting the heating device and the humidifier 111. The embodiment of the present application can realize the detection of the temperature and/or humidity in the pipeline by providing the first temperature sensor 171 and/or the first humidity sensor 172 on the pipeline connecting the heating device and the humidifier 111. That is, the first temperature sensor 171 and the first humidity sensor 172 in fig. 1 and fig. 2 are identical in arrangement positions, and are provided on the pipe of the inlet end of the heating apparatus.

The heating device is usually a heat exchanger 12, which exchanges heat between the exhaust gas and the inlet gas, thereby cooling the exhaust gas and heating the inlet gas.

Optionally, as shown in fig. 2, the drying device 13 delivers the dried gas to the heating device through a first pipe 101, and a second temperature sensor 173 and/or a second humidity sensor 174 are provided on the first pipe 101.

The embodiment of the present application can implement the detection of the temperature and/or humidity in the first pipeline 101 by providing the second temperature sensor 173 and/or the second humidity sensor 174 on the first pipeline 101.

In fig. 2, the drying system 10 is further provided with a third temperature sensor 175 and a fourth temperature sensor 176, wherein the measured value of the third temperature sensor 175 is T3, the measured value of the fourth temperature sensor 176 is T4, the third temperature sensor 175 is disposed on the air intake line 14, and the fourth temperature sensor 176 is disposed at the inlet end of the humidifier 111, so that the temperatures at these two positions can be further detected.

Optionally, as shown in fig. 2, the drying system 10 further includes a surface cooler 19, where the surface cooler 19 is disposed on the air intake line 14. After the fresh air passes through the surface cooler 19, the humidity of the fresh air can be adjusted, and the surface cooler 19 has three functions of refrigerating water inlet, refrigerating water outlet and water discharge, so that the humidity of the air is reduced, and the air after the humidity reduction is mixed with the exhaust air and then enters the humidifier 111.

By arranging the surface cooler 19 on the air inlet pipeline 14, the embodiment of the application can realize the adjustment of the humidity of the fresh air in the air inlet pipeline 14 through the surface cooler 19.

In fig. 2, the first valve 141 and the second valve 151 can each control the amount of air by using an electric proportional air valve, so that the air volume can be more accurately adjusted.

Alternatively, as shown in fig. 3, the drying device 13 is in direct communication with the first exhaust line 15. That is, the drying device 13 and the first exhaust line 15 may be directly connected through the third line 103, and the third line 103 is also provided with a valve for controlling the flow of gas.

By directly communicating the drying device 13 with the first exhaust pipeline 15, the embodiment of the application can directly convey the gas exhausted by the drying device 13 into the first exhaust pipeline 15, thereby increasing the temperature of the gas in the first exhaust pipeline 15.

Alternatively, as shown in fig. 3, the drying device 13 and the heating device are communicated through a second pipeline 102, and a filter 18 is arranged on the second pipeline 102, where the filter 18 may be a medium-efficiency filter component, so as to implement filtration of gas.

In the embodiment of the application, the drying device 13 and the heating device are communicated through the second pipeline 102, and the filter 18 is arranged on the second pipeline 102, so that the gas entering the drying device 13 can be filtered.

In fig. 3, the gas exhausted from the drying device 13 is divided into two paths, one path is used for conveying the dried gas to the heating device through the first pipeline 101, and the other path is used for conveying the dried gas to the first exhaust pipeline 15 through the third pipeline 103, so that the temperature and the humidity of the exhaust gas can be better adjusted.

In fig. 3, a first temperature sensor 171 and a first humidity sensor 172 are provided on a line between the humidifier 111 and the pressurizing member 142, and a second temperature sensor 173 and a second humidity sensor 174 are provided on a line on a downstream side of the first exhaust member 153, so that the temperature and humidity of the gas in the drying device 13 can be adjusted.

In addition, Q1, Q2 and Q3 in fig. 3 are each used to characterize the flow rate of the gas in the respective lines, and control of the flow rate can be achieved by adjusting the opening of the valve on the respective line.

In various embodiments of the present application, the power of the blower may be selected as desired, such as selecting a 75KW blower or other power blower, without limitation.

A second aspect of the present application proposes a battery production apparatus including the drying system 10 as mentioned in the above embodiment.

The battery production equipment is equipment used in the production process of the power battery, and can realize the production of the power battery.

A third aspect of the present application proposes a pole piece coating and drying method, in which the drying system 10 mentioned in the above embodiment is applied to a pole piece coating and drying method, the pole piece coating and drying method includes:

acquiring a second humidity of the exhaust gas of the drying device 13;

adjusting the first humidity, the first temperature and the second humidity to be respectively in corresponding preset ranges;

drying the pole piece coated membrane placed in the drying device 13.

In this embodiment, the first humidity has a corresponding preset range, the first temperature has a corresponding preset range, and the second humidity has a corresponding preset range, and the temperature and the humidity of the gas in the drying device 13 can be adjusted by adjusting the first humidity, the first temperature and the second humidity to be within the corresponding preset ranges, so that the temperature and the humidity of the drying device 13 are within the corresponding preset ranges.

Optionally, adjusting the first humidity, the first temperature, and the second humidity to be within the corresponding preset ranges respectively specifically includes:

Adjusting the ratio of the outdoor fresh air in the air entering the heating device to the exhaust air of the drying system 10 so that the first temperature is within a first preset range and the first humidity is within a second preset range;

the opening period of the humidity adjustment means 11 is adjusted so that the second humidity is within a third preset range.

The first preset range here may be 30 to 50 degrees celsius, that is, the first temperature is within 30 to 50 degrees celsius, such as 40 degrees celsius or 45 degrees celsius, or the like. The second preset range may be 25 to 35 grams per cubic centimeter, such as 30 or 35 grams per cubic centimeter, etc. The third predetermined range may be 30 to 50 grams per cubic centimeter, such as 35 or 40 grams per cubic centimeter, and the like.

It should be noted that, in the adjustment process, there is no need to distinguish the sequence, that is, the opening duration of the humidity adjustment device 11 may be adjusted first so that the second humidity is within a third preset range, and then the proportion of the outdoor fresh air in the air entering the heating device and the exhaust air of the drying system 10 is adjusted so that the first temperature is within a first preset range and the first humidity is within a second preset range; the adjustment may also be performed in reverse order.

The humidity adjustment device 11 includes a humidifier 111 and a dehumidifier 112, which respectively realize an increase and a decrease in humidity. The surface cooler 19 may be used instead of the dehumidifier 112 to increase and decrease the humidity, respectively, and the second humidity may be controlled by the opening time of the humidity adjusting device 11.

The control of the first temperature and the first humidity may be achieved by adjusting the ratio of the outdoor fresh air in the air entering the heating device to the exhaust air of the drying system 10, increasing the first temperature by increasing the exhaust air amount of the drying system 10 when the first temperature is lower than a first preset range, and decreasing the first temperature by decreasing the exhaust air amount of the drying system 10 when the first temperature is higher than the first preset range. With respect to the structure of fig. 1, when the first humidity is lower than the second preset range, the air volume passing through the analysis region 1122 is reduced by decreasing the opening of the exhaust valve 161, so that the first humidity is increased; when the first humidity is higher than the second preset range, the opening of the exhaust valve 161 is increased to increase the air volume passing through the analysis region 1122, thereby reducing the first humidity and realizing the adjustment of the first humidity. With respect to the structures of fig. 2 and 3, when the first humidity is lower than the second preset range, the exhaust amount of the drying system 10 is reduced and the first humidity is increased by decreasing the opening of the first valve 141; when the first humidity is higher than the second preset range, the opening of the first valve 141 is increased to increase the exhaust air quantity of the drying system 10, reduce the first humidity, and realize automatic adjustment of the first humidity.

Of course, here, the opening of the second valve 151 may be adjusted to adjust the amount of fresh air, so as to automatically adjust the first temperature and the first humidity.

Of course, the opening degrees of the first valve 141 and the second valve 151 may be simultaneously adjusted to automatically adjust the first temperature, the first humidity, and the second humidity.

The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims

1. A drying system, the drying system comprising:

the humidity adjusting device is used for adjusting the humidity of the gas;

the heating device is used for heating the gas treated by the humidity adjusting device; and

the drying device is used for receiving the gas heated by the heating device, and the gas received by the drying device is used for drying the film coated by the pole piece, wherein the temperature and the humidity of the gas received by the drying device are both in a corresponding preset range;

The heating device comprises a heat exchanger, wherein the heat exchanger is used for cooling at least part of gas exhausted by the drying device and heating other gases entering the heating device.

2. The drying system according to claim 1, wherein the humidity adjusting means includes a humidifier for humidifying the gas, the humidifier being connected with an air intake pipe for supplying the gas into the humidifier, wherein a first valve is provided in the air intake pipe, and the amount of the gas entering the humidifier is controlled by the first valve.

3. The drying system of claim 2 wherein at least a portion of the cooled gas exhausted by the heating device is delivered to the humidifier.

4. The drying system according to claim 3, wherein the humidity control apparatus further comprises a dehumidifier, the dehumidifier comprising an adsorption zone and a desorption zone, the gas humidified by the humidifier being sent to the heating apparatus after passing through the adsorption zone, at least part of the gas discharged from the drying apparatus being discharged through the desorption zone.

5. The drying system of claim 4 wherein said air inlet conduit is further provided with a plenum for pressurizing the air and providing the pressurized air to said humidifier.

6. The drying system of claim 5 wherein said plenum is located downstream of said first valve in the direction of gas flow in said inlet line.

7. The drying system according to claim 5 or 6, wherein the heating device is connected to a first exhaust line for exhausting cooled gas, wherein the first exhaust line is in communication with the intake line, and a connection position of the first exhaust line and the intake line is located on a line between the pressurizing member and the first valve.

8. The drying system of claim 7 wherein the first exhaust conduit is provided with a first exhaust member.

9. The drying system of claim 8 wherein said first exhaust line is connected to said intake line by a manifold, wherein said manifold is provided with a second valve.

10. The drying system of claim 9 wherein the junction of said manifold and said first exhaust duct is located on the downstream side of said first exhaust member in the direction of gas flow within said first exhaust duct.

11. The drying system of claim 4 further comprising a second exhaust line for receiving gas exhausted from said drying means, said gas in said second exhaust line flowing through said resolving section.

12. The drying system of claim 11 wherein an exhaust valve is provided on said second exhaust line, and wherein gas in said second exhaust line flows through said exhaust valve and into said resolving area.

13. The drying system of claim 12 wherein a second exhaust is provided on said second exhaust conduit, and gas exiting said resolving area is exhausted through said second exhaust.

14. The drying system of claim 4, further comprising a first temperature sensor and a first humidity sensor, wherein the first temperature sensor and/or the first humidity sensor is/are provided on a pipe connecting the adsorption zone and the heating device.

15. The drying system according to claim 1, further comprising a second temperature sensor and a second humidity sensor, wherein the second temperature sensor and/or the second humidity sensor is/are provided on a pipe connecting the heating device and the drying device.

16. The drying system according to claim 2, further comprising a first temperature sensor and a first humidity sensor, wherein the first temperature sensor and/or the first humidity sensor is/are provided on a pipe connecting the heating device and the humidifier.

17. The drying system according to claim 16, further comprising a second temperature sensor and a second humidity sensor, wherein the drying device delivers the dried gas to the heating device via a first line, wherein the second temperature sensor and/or the second humidity sensor is/are provided on the first line.

18. The drying system of claim 2, further comprising a surface cooler disposed on the air intake line.

19. The drying system of claim 7 wherein said drying means is in direct communication with said first exhaust line.

20. The drying system of claim 1, wherein said drying means and said heating means are in communication via a second conduit, and wherein a filter is disposed on said second conduit.

21. A battery production apparatus, characterized in that the battery production apparatus comprises the drying system according to any one of claims 1 to 20.

22. A pole piece coating and drying method, to which the drying system according to any one of claims 1 to 20 is applied, characterized by comprising:

acquiring a second humidity of the exhaust gas of the drying device;

and drying the pole piece coated membrane placed in the drying device.

23. The pole piece coating and drying method of claim 22, wherein the adjusting the first humidity, the first temperature, and the second humidity to be within the respective preset ranges comprises:

adjusting the ratio of the outdoor fresh air in the air entering the heating device to the exhaust air of the drying system so that the first temperature is in a first preset range and the first humidity is in a second preset range;