CN209082015U - A kind of copper foil warpage annealing device - Google Patents

Abstract

The utility model discloses a copper foil warping heat treatment device, which is arranged by a combination of an oven, a circulating air device and a heating device; the heat in the hot air is transferred to the copper foil through a first end of the oven to play a heating role and lose part of the heat , under the action of the circulating air device, the cold air is drawn into the heating device through the second end of the oven through the exhaust pipe, and then enters the oven to form a closed-circuit circulation system; The cold air located inside the second end of the oven is drawn away; the combination of the circulating fan, the supply air pipeline and the exhaust air pipeline can ensure the generation of circulating air; the temperature detection in the oven is completed through the temperature probe, and the temperature detection result is fed back to the digital Display temperature controller, adjust the digital display temperature controller to quickly, accurately and efficiently control the temperature of the copper foil in the oven.

Description

A copper foil warping heat treatment device

technical field

The utility model belongs to the technical field of electrolytic copper foil production, in particular to a copper foil warping heat treatment device.

Background technique

Electrolytic copper foil is generated by electrochemically depositing copper ions on the cathode titanium roller. As the thickness of the copper foil continues to increase during the growth process of the copper foil, the electrochemical environment is constantly changing, and the crystal grains of the copper foil are formed. The size and morphology also change with the change. The grain composition of the copper foil from the bright side to the rough side gradually changes from the initial equiaxed crystal to the columnar crystal, and the grain size also becomes larger; during the subsequent winding process , Due to the existence of winding tension, the internal stress generated between grains of different sizes and shapes in the copper foil is also different, and the internal stress is time-sensitive, that is, the internal stress will slowly change the arrangement, shape and shape of the grains in the copper foil. The size of the copper foil shows the warpage from the bright surface to the rough surface on the macroscopic level.

The warping of copper foil, on the one hand, affects the convenience of the winding operation; on the other hand, it affects the uniformity of slurry distribution during coating by downstream customers, affects the quality of lithium batteries, and causes huge losses to the company. At present, the heating method is generally adopted in the production process to reduce the warpage of the copper foil. However, due to the limitations of the production process and equipment, coupled with the lack of experience for reference, the work efficiency is low, the treatment effect is not ideal, and the operation is cumbersome, use and Maintenance costs are high.

SUMMARY OF THE INVENTION

The purpose of this utility model is to provide a copper foil warpage heat treatment device in order to solve the above problems.

The utility model realizes the above-mentioned purpose through the following technical solutions:

A copper foil warping heat treatment device, comprising:

Oven for placing copper foil;

A circulating air device for blowing in the air from the first end of the oven and extracting the air from the second end of the oven;

The heating device is used to heat the air blown into the oven by the circulating air device; the heating device is installed on the air supply pipeline of the circulating air device.

According to the second law of thermodynamics (heat can spontaneously transfer from a high temperature object to a low temperature object, but cannot spontaneously transfer from a low temperature object to a high temperature object), the heat in the hot air passes through the first end of the oven It is transferred to the copper foil for heating and loses part of the heat. Under the action of the circulating air device, the cold air is drawn into the heating device through the second end of the oven through the exhaust duct, and then enters the oven for heating, forming a closed circuit. system.

Specifically, the second end of the oven is provided with an operation port, and the operation port is sealed by a sealing device.

The copper foil can be put in and taken out through the operation port; and the sealing device can be set to ensure that the oven is in a sealed state during the working process.

Specifically, the circulating air device includes:

Circulation fan;

Air supply pipeline; the air outlet of the circulating fan is communicated with the first end of the oven through the air supply pipeline;

exhaust pipe;

Exhaust pipe; the exhaust pipe is installed inside the oven, the exhaust pipe includes a plurality of sub-exhaust pipes whose first ends are open, the first end of the sub-exhaust pipes is located inside the second end of the oven, and the air inlet of the circulating fan passes through The air extraction pipes are respectively communicated with the second ends of the plurality of sub air extraction pipes.

The unique structural design of the exhaust duct can ensure that the cold air located inside the second end of the oven can be quickly and comprehensively taken away; the combination of circulating fans, air supply pipes and exhaust pipes can ensure the generation of circulating air.

Specifically, the heating device is a heating box.

Specifically, the copper foil warpage heat treatment device also includes:

Multiple temperature probes for collecting the temperature of each point in the oven;

Digital temperature controller; the data signal input terminals of the digital temperature controller are respectively connected with the data signal output terminals of a plurality of temperature probes; the control signal output terminal of the digital temperature controller is connected with the control signal input terminal of the heating device.

The temperature detection in the oven is completed by the temperature probe, and the temperature detection result is fed back to the digital temperature controller, and the digital temperature controller is adjusted to quickly, accurately and efficiently realize the temperature control of the copper foil in the oven.

Specifically, a foil placement rack for placing copper foil is arranged in the oven, the foil placement rack includes upper, middle and lower layers, and a sliding wheel is provided at the bottom of the foil placement rack.

The foil rack is divided into upper, middle and lower layers, which can make full use of the inner working space of the oven, and the bottom is designed with sliding wheels, which are small and exquisite, easy to operate, highly maneuverable and efficient.

Specifically, the air supply pipeline is connected to the lower part of the first end of the oven, and a baffle plate for allowing the hot air to spread to the bottom of the oven evenly and effectively is provided at a corresponding position inside the oven, and the baffle plate is used to prevent the hot air from blowing directly to the oven. copper foil.

Specifically, a three-way regulating valve is provided on both the air supply pipeline and the air extraction pipeline.

The design of the three-way regulating valve is convenient to expand the working space in the later stage, and the working space can be expanded to the maximum extent only by connecting the three-way regulating valve.

Specifically, the outside of the circulating fan, the heating box, the air supply pipeline and the exhaust pipeline are all wrapped with a layer of thermal insulation, fireproof and corrosion-resistant components composed of silicone wool, glass wool, cement, and nylon mesh.

Minimize the consumption of thermal energy, improve the efficient use of energy and prolong the service life of the equipment.

A processing method of a copper foil warping heat treatment device, comprising the following steps:

(1) According to the size of the site, make an oven of suitable size, and use the space reasonably;

(2) Make and install an operation port at the second end of the oven, and the operation port adopts a side-by-side design, which is convenient for operation to the greatest extent;

(3) Punch holes at the bottom of the first end of the oven to make tuyere and install a three-way regulating valve;

(4) Install a baffle plate in front of the bottom air outlet at the first end of the oven, so that the hot air entering the oven can be spread to the bottom of the oven evenly and effectively;

(5) Make a hole on the top of the first end of the oven to make a tuyere and install a three-way regulating valve;

(6) install the exhaust pipe at the top tuyere of the first end of the oven, so that the cold air is drawn out from the top inside the first end of the oven;

(7) Connect the three-way regulating valve of the air outlet of the oven and the air outlet of the circulating fan with the air exhaust pipe, so that the cold air of the oven enters the circulating fan;

(8) Making a heating box, the two sides of the heating box are respectively provided with an air inlet and an air outlet, and a plurality of electric heating groups are arranged inside the heating box;

(9) Connect the air supply port of the circulating fan and the air outlet of the heating box with an air supply pipeline;

(10) Use the air supply pipeline to connect the three-way regulating valve of the air outlet of the heating box and the air inlet of the oven;

(11) Install a digital temperature controller, and install a temperature probe on the top of the oven to control the oven temperature in real time;

(12) Make a foil holder of suitable size;

(13) Put the finished copper foil that needs heat treatment on the foil rack, and then place the foil rack with the copper foil neatly and orderly in the oven, and close the operation port;

(14) After adjusting the three-way regulating valve at the air inlet and air outlet of the oven, start the circulating fan, and filter the air flow inside the oven through the air filter device to meet the working requirements;

(15) Set the digital temperature controller to the target temperature;

(16) After heating for a certain period of time under standard temperature conditions, take out the finished copper foil;

(17) Cool and pack the finished copper foil after heat treatment in a suitable working environment with an appropriate method.

The beneficial effects of the present utility model are:

1. It is set by the combination of oven, circulating air device and heating device; and according to the second law of thermodynamics (heat can spontaneously transfer from a high temperature object to a low temperature object, but it is impossible to spontaneously transfer from a low temperature object to Objects with high temperature), the heat in the hot air is transferred to the copper foil through the first end of the oven to heat and lose part of the heat. After being heated in the heating device, it enters the oven to form a closed-circuit circulation system; the unique structural design of the exhaust duct can ensure that the cold air located at the second end of the oven can be quickly and comprehensively drawn away; the circulating fan, the air supply pipe The combination of the road and the exhaust pipe can ensure the generation of circulating air; the temperature detection in the oven is completed through the temperature probe, and the temperature detection results are fed back to the digital display temperature controller, and the digital display temperature controller is adjusted so as to quickly, accurately and efficiently Realize the temperature control of the copper foil in the oven.

2. The unique copper foil treatment method makes the copper foil treatment more environmentally friendly, energy-saving, simple to operate, convenient and fast, and has a large expansion space.

Description of drawings

FIG. 1 is a schematic structural diagram of a copper foil warping heat treatment device in the present invention.

In the figure: 1. Digital temperature controller; 2. Three-way regulating valve; 3. Circulating fan; 4. Heating box; 5. Baffle plate; 6. Temperature probe; 7. Exhaust pipe; 8. Sealing device; 9. Operation port; 10. Oven; 11. Foil rack.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

Embodiment 1, as shown in Figure 1:

A copper foil warping heat treatment device, comprising:

Oven 10 for placing copper foil;

A circulating air device for blowing in the air from the first end of the oven 10 and extracting the air from the second end of the oven 10;

The heating device is used for heating the air blown into the oven 10 by the circulating air device; the heating device is installed on the air supply pipeline of the circulating air device.

According to the second law of thermodynamics (heat can spontaneously transfer from a high-temperature object to a low-temperature object, but cannot spontaneously transfer from a low-temperature object to a high-temperature object), the heat in the hot air passes through the first The end is transferred to the copper foil to play a heating role and lose part of the heat. Under the action of the circulating air device, the cold air is drawn into the heating device through the second end of the oven 10 through the air duct 7 and then enters the oven 10 for heating. , forming a closed loop system.

Embodiment 2, as shown in Figure 1:

The difference between this embodiment and Embodiment 1 is:

The second end of the oven 10 is provided with an operation port 9, and a sealing device 8 is provided at the operation port 9 for sealing.

The copper foil can be put in and taken out through the operation port 9; and the sealing device 8 can be provided to ensure that the oven 10 is in a sealed state during the working process.

Embodiment 3, as shown in Figure 1:

The difference between this embodiment and Embodiment 1 is that the circulating air device includes:

Circulation fan 3;

Air supply pipeline; the air outlet of the circulating fan 3 is communicated with the first end of the oven 10 through the air supply pipeline;

7 way exhaust pipe;

The exhaust pipe 7; the exhaust pipe 7 is installed inside the oven 10, the exhaust pipe 7 includes a plurality of sub-exhaust pipes 7 whose first ends are open, and the first end of the sub-exhaust pipes 7 is located inside the second end of the oven 10 , the air inlet of the circulating fan 3 is communicated with the second ends of the plurality of sub-exhaust pipes 7 respectively through the exhaust pipes 7 .

The unique structural design of the exhaust pipe 7 can ensure that the cold air located inside the second end of the oven 10 can be quickly and comprehensively drawn away; the combination of the circulating fan 3, the air supply pipe and the exhaust pipe 7 can ensure the generation of circulating air .

Embodiment 4, as shown in Figure 1:

The difference between this embodiment and Embodiment 1 is that the heating device is a heating box 4 .

Embodiment 5, as shown in Figure 1:

The difference between this embodiment and Embodiment 1 or Embodiment 4 is that the copper foil warpage heat treatment device also includes:

a plurality of temperature probes 6 for collecting the temperature of each point in the oven 10;

Digital temperature controller 1; data signal input terminals of digital temperature controller 1 are respectively connected with data signal output terminals of a plurality of temperature probes 6; control signal output terminal of digital temperature controller 1 is connected with the control signal input of the heating device end connection.

The temperature detection in the oven 10 is completed by the temperature probe 6, and the temperature detection result is fed back to the digital display temperature controller 1, and the digital display temperature controller 1 is adjusted to quickly, accurately and efficiently realize the temperature control of the copper foil in the oven 10. The plurality of temperature probes 6 respectively correspond to the plurality of electric heating groups in the above-mentioned heating box 4, operate independently, and work together;

Embodiment 6, as shown in Figure 1:

The difference between this embodiment and Embodiment 1 is that: the oven 10 is provided with a foil rack 11 for placing copper foil, the foil rack 11 includes upper, middle and lower layers, and the bottom of the foil rack 11 is provided with sliding wheel.

The foil rack 11 is divided into upper, middle and lower layers, which can make full use of the inner working space of the oven 10, and the bottom is designed with sliding wheels, which are small and exquisite, easy to operate, highly maneuverable and efficient.

Embodiment 7, as shown in Figure 1:

The difference between this embodiment and Embodiment 1 is that the air supply pipeline is connected to the lower part of the first end of the oven 10 , and a baffle plate for allowing the hot air to spread to the bottom of the oven 10 evenly and effectively is provided at the corresponding position inside the oven 10 . 5. The baffle 5 is used to block the hot air from blowing directly to the copper foil. The baffle 5 is perpendicular to the blowing direction of the hot air.

Embodiment 8, as shown in Figure 1:

The difference between this embodiment and Embodiment 2 is that a three-way regulating valve 2 is provided on both the air supply pipeline and the air extraction pipeline 7 .

The design of the three-way regulating valve 2 is convenient for expanding the working space in the later stage, and the working space can be expanded to the maximum extent only by connecting the three-way regulating valve 2.

Example 9:

The difference between this embodiment and Embodiment 1 is that the outside of the circulating fan 3, the heating box 4, the air supply pipe and the exhaust pipe 7 are all wrapped with a layer of heat preservation, which is composed of silicone wool, glass wool, cement, and nylon mesh. Fire and corrosion resistant components.

Minimize the consumption of thermal energy, improve the efficient use of energy and prolong the service life of the equipment.

Example 10:

The difference between this embodiment and Embodiment 1 is that the material used in the above-mentioned oven 10 is made of double-layer steel plates wrapped with silicone wool in the middle, and is seamlessly welded, which can effectively ensure the loss of heat inside the oven 10 and improve energy utilization;

Example 11:

The difference between this embodiment and any one of Embodiments 1-10 is: a processing method of a copper foil warpage heat treatment device, comprising the following steps:

1. According to the size of the site, make a suitable size oven 10, and use the space reasonably;

2. The operation port 9 is made and installed on the second end of the oven 10, and the operation port 9 adopts a side-to-side door design, which is convenient for operation to the greatest extent;

3. Punch holes at the bottom of the first end of the oven 10 to make a tuyere and install the three-way regulating valve 2;

4. Install the baffle 5 in front of the bottom tuyere of the first end of the oven 10, so that the hot air entering the oven 10 can spread to the bottom of the oven 10 evenly and effectively;

5. Drill a hole on the top of the first end of the oven 10 to make a tuyere and install the three-way regulating valve 2;

6. Install the exhaust pipe 7 at the top air outlet of the first end of the oven 10, so that the cold air is drawn out from the top of the inner side of the first end of the oven 10;

7. Connect the three-way regulating valve 2 of the air outlet of the oven 10 and the air outlet of the circulation fan 3 with the exhaust pipe 7, so that the cold air of the oven 10 enters the circulation fan 3;

8. The heating box 4 is made. The two sides of the heating box 4 are respectively provided with an air inlet and an air outlet, and there are multiple electric heating groups inside the heating box 4;

9. Use the air supply pipeline to connect the air supply port of the circulating fan 3 and the air outlet of the heating box 4;

10. Connect the three-way regulating valve 2 of the air outlet of the heating box 4 and the air inlet of the oven 10 with an air supply pipeline;

11. Install the digital temperature controller 1, and install the temperature probe 6 on the top of the oven 10 to control the temperature of the oven 10 in real time;

12. Make a foil holder 11 of suitable size;

13. Put the finished copper foil to be heat-treated on the foil rack 11, then place the foil rack 11 on which the copper foil is placed in an orderly manner in the oven 10, and close the operation port 9;

14. After adjusting the three-way regulating valve 2 at the air inlet and air outlet of the oven 10, start the circulating fan 3, and filter the air flow inside the oven 10 through the air filter device to meet the working requirements. The air filter device can dedust the working air flow. , the effect of dehumidification;

15. Set the digital temperature controller 1 to the target temperature;

16. After heating for a certain time under standard temperature conditions, take out the finished copper foil;

17. Cool and pack the finished copper foil after heat treatment in a suitable working environment with an appropriate method.

The heat treatment device of the present utility model works as follows:

The circulating fan 3 draws out the cold air in the airtight oven 10 from the top of the oven 10 through the exhaust duct 7 (the air flow is formed inside the oven 10), and then sends it into the heating box 4 for heating, and then enters the oven 10 through the air supply duct. Internally, the working air flow in the oven 10 adopts an overall balanced ventilation design. The baffle 5 installed in front of the air inlet of the oven 10 can effectively distribute the hot air entering the oven 10 to the bottom of the oven 10. According to the second law of thermodynamics (heat can spontaneously It can be transferred from a high temperature object to a low temperature object, but it is impossible to spontaneously transfer from a low temperature object to a high temperature object). According to the principle of air flow (it always flows from the hot side to the cold side), the hot air at the bottom of the oven 10 flows to the top of the oven 10 and loses part of the heat to become cold air, and then enters through the exhaust duct 7 again under the action of the circulating fan 3 After heating in the heating box 4, it enters the oven 10 to form a closed-circuit circulation system; according to the zeroth law of thermodynamics (the law of thermal equilibrium), the digital display temperature controller 1 is adjusted to quickly, accurately and efficiently realize the copper in the oven 10. The temperature control of the foil; the air filter device in the heating box 4 has the effect of dedusting and dehumidifying the working air flow during this process, which can effectively ensure the working environment of the system, and is scientific and efficient.

The advantages of this utility model compared with the copper foil warpage heat treatment process currently used are:

(1) Environmental protection and energy saving. In the actual operation process of the utility model, only electric energy is consumed, no other auxiliary energy consumption is required, and a plurality of heating groups are controlled by the digital display temperature controller 1, which can operate independently or work together, and the whole equipment is in a sealed package state. , the working airflow is in a self-circulating state, which minimizes the loss of thermal energy, saves energy consumption, and reduces production costs. After a month of actual load operation, its sealing degree is completely comparable to that of vacuum oven 10, and the average daily power consumption is only about 85°, which is 30-40% of the power consumption of traditional equipment;

(2) Efficient and advanced. In the actual operation process of the utility model, the temperature can be raised from room temperature to 90°C within one hour, and the overall balanced ventilation design is efficient in work, and the digital display temperature controller 1 has high control accuracy, which can accurately control copper Foil temperature, the warpage of the heat-treated copper foil can be reduced to less than 5mm. Compared with the traditional process, it has the advantages of short heating time, high operation accuracy, obvious treatment effect and excellent performance;

(3) The operation is simple, convenient and quick. In the actual operation process, the staff only needs to set the target temperature of the oven 10 to achieve real-time heating of the finished copper foil, eliminating the tedious process of traditional operations. Strong, high space utilization rate, the daily heat treatment volume of copper foil is increased from about 3 tons in the traditional process to about 7 tons, the work efficiency is increased by 2-3 times, and the effect is obvious;

(4) Ingenious design and scientific layout. The working air flow in the oven 10 adopts an overall balanced ventilation design. The air inlets, baffles 5, exhaust ports and exhaust ducts in the oven 10 have their own characteristics, plus the digital temperature controller 1 and the air filter device are all reflected. The convenience and intelligence brought by technology;

(5) Large room for expansion. The design of the three-way control valve 2 at the air inlet and air outlet of the oven 10 is the finishing touch. The working space can be expanded according to actual needs in the later stage, which is extremely convenient, and any one (or two) oven 10 can be selected by adjusting the valve. Carry out work and have strong operability;

(6) Savings and cost reduction. The utility model has successfully built a heating oven 10 of more than 50 cubic meters for our company with a single heating treatment of more than 7 tons of copper foil, which relieves the supply pressure of the market demand for low-warpage copper foil, and the utility model can completely replace The vacuum oven 10 saves more than 200,000 yuan in comparison, plus the immeasurable room for expansion in the later period.

The basic principles, main features and advantages of the present invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention There will also be various changes and improvements in the new model, which all fall within the scope of the claimed invention. The claimed scope of the utility model is defined by the appended claims and their equivalents.

Claims (9)

1. A copper foil warping heat treatment device, characterized in that it comprises: an oven for placing copper foil; a circulating air device for blowing in air from the first end of the oven and extracting the air from the second end of the oven; The heating device is used to heat the air blown into the oven by the circulating air device; the heating device is installed on the air supply pipeline of the circulating air device. 2 . The copper foil warpage heat treatment device according to claim 1 , wherein the second end of the oven is provided with an operation port, and the operation port is sealed by a sealing device. 3 . 3. The copper foil warping heat treatment device according to claim 1, wherein the circulating air device comprises: a circulating fan; an air supply pipeline; The end is connected; the exhaust pipe; the exhaust pipe; the exhaust pipe is installed inside the oven, the exhaust pipe includes a plurality of sub-exhaust pipes whose first ends are open, and the first end of the sub-exhaust pipes is located at the second end of the oven Inside, the air inlets of the circulating fans are respectively communicated with the second ends of the plurality of sub-exhaust pipes through the exhaust pipes. 4 . The copper foil warpage heat treatment device according to claim 1 , wherein the heating device is a heating box. 5 . 5. A copper foil warpage heat treatment device according to claim 1 or 4, wherein the copper foil warpage heat treatment device further comprises: a plurality of temperature probes for collecting the temperature of each point in the oven; controller; the data signal input terminals of the digital temperature controller are respectively connected with the data signal output terminals of a plurality of temperature probes; the control signal output terminal of the digital temperature controller is connected with the control signal input terminal of the heating device. 6 . The copper foil warping heat treatment device according to claim 1 , wherein a foil rack for placing the copper foil is arranged in the oven, and the foil rack includes upper, middle and lower layers, and the The bottom of the foil holder is provided with sliding wheels. 7. A copper foil warping heat treatment device according to claim 1, characterized in that: the air supply pipeline is connected to the lower part of the first end of the oven, and a corresponding position inside the oven is provided to allow the hot air to be uniform and effective. Spread to the baffle at the bottom of the oven, the baffle is used to block the hot air from blowing directly to the copper foil. 8 . The copper foil warping heat treatment device according to claim 2 , wherein a three-way regulating valve is provided on both the air supply pipeline and the air extraction pipeline. 9 . 9. A copper foil warping heat treatment device according to claim 1, characterized in that: the outside of the circulating fan, the heating box, the air supply pipeline and the air extraction pipeline are all wrapped and provided with a layer of silicone wool, glass wool, Thermal insulation, fireproof and corrosion-resistant components composed of cement and nylon mesh.