Electrode film forming apparatus

Abstract

The utility model discloses electrode film forming equipment, which comprises a rolling part, a temperature adjusting part and a cooling part, the rolling part comprises a plurality of calendering rollers, the plurality of calendering rollers are arranged in sequence, and each calendering roller comprises a first liquid inlet end; the temperature adjusting part is connected with first liquid inlet end pipelines of the plurality of calendering rollers, and the temperature adjusting part is used for conveying a temperature conducting agent to the plurality of calendering rollers; the cooling part comprises a plurality of coolers, each cooler is connected with a first liquid inlet end pipeline of one calendering roller, each cooler is provided with a first adjusting valve, and the first adjusting valves are used for adjusting the cooling capacity of the corresponding coolers so as to adjust the temperature of the flowing heat conduction agent. Therefore, the cooling capacity of the corresponding cooler is adjusted through the different first adjusting valves, the temperature of the temperature conducting agent flowing to the different calendering rollers can be adjusted, and therefore the roller surface temperature of the different calendering rollers can be conveniently adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, and more specifically, to an electrode film forming device. Background Art

[0002] During battery production, the performance of the electrode directly impacts the performance of the finished battery. Currently, electrode manufacturing methods include dry electrode technology and wet electrode technology. Dry electrode technology is favored by battery manufacturers due to its lower energy consumption, lower cost, and better environmental performance.

[0003] In the powder film forming process, a rolling device comprising two or more rollers is usually used for rolling film formation. During the rolling process, the different roller surface temperatures usually need to be connected to temperature control equipment for separate control, making the control complex and costly. Utility Model Content

[0004] The purpose of the utility model is to provide a new technical solution for electrode film forming equipment.

[0005] According to one aspect of the present invention, there is provided an electrode film forming device, comprising:

[0006] A rolling part, the rolling part comprising a plurality of calendering rollers, the plurality of calendering rollers are arranged in sequence, and each of the calendering rollers comprises a first liquid inlet end;

[0007] a temperature regulating part connected to the first liquid inlet end pipelines of the plurality of calendering rollers, and configured to convey a temperature conducting agent to the plurality of calendering rollers;

[0008] The cooling section includes a plurality of coolers, each of which is connected to the first liquid inlet end pipeline of a calendering roller, and each of the coolers has a first regulating valve, which is used to adjust the cooling capacity of the corresponding cooler to adjust the temperature of the temperature conducting agent flowing through.

[0009] Optionally, at least some of the first regulating valves have different opening degrees.

[0010] Optionally, the cooling part also includes a cooling source, the cooler includes a cooling plate, and a third liquid inlet and a third liquid outlet located on both sides of the cooling plate, the third liquid inlet and the third liquid outlet are respectively connected to the cooling source pipeline, the first regulating valve is located between the third liquid inlet and the cooling source, and the first regulating valve can adjust the flow rate of the coolant flowing to the cooling plate to adjust the cooling capacity of the corresponding cooler.

[0011] Optionally, each of the calendering rollers further includes a first liquid outlet end, the temperature regulating portion includes a second liquid inlet end and a second liquid outlet end, the second liquid outlet end is connected to a plurality of the first liquid inlet end pipelines, and the second liquid inlet end is connected to a plurality of the first liquid outlet end pipelines.

[0012] Optionally, a plurality of second regulating valves are further included, wherein the second regulating valve is arranged between the second liquid outlet and one of the coolers, and the second regulating valve is used to adjust the flow rate of the temperature conducting agent flowing to the corresponding calendering roller.

[0013] Optionally, the opening degrees of at least some of the second regulating valves are different.

[0014] Optionally, the calendering roller has a hollow sandwich structure, and the calendering roller has a liquid inlet cavity, a liquid outlet cavity and a roller pressure cavity. The roller pressure cavity is located outside the liquid inlet cavity and the liquid outlet cavity. One end of the roller pressure cavity is connected to the liquid inlet cavity, and the other end of the roller pressure cavity is connected to the liquid outlet cavity, and the liquid inlet cavity is connected to the first liquid inlet end pipeline.

[0015] Optionally, the calendering roller further includes a first liquid outlet end, and the first liquid outlet end is connected to the liquid outlet cavity pipeline.

[0016] Optionally, a plurality of baffles are provided in the rolling chamber, and the plurality of baffles divide the rolling chamber into a plurality of flow channels.

[0017] Optionally, the calendering roller is provided with a first through hole and a second through hole, the first through hole connecting one end of the rolling chamber with the liquid inlet chamber, and the second through hole connecting the other end of the rolling chamber with the liquid outlet chamber.

[0018] Optionally, the first through hole and the second through hole are arranged along the flow direction of the thermal conductive agent.

[0019] One of the technical effects of the present invention is:

[0020] The electrode film forming equipment includes a rolling section, a temperature control section, and a cooling section. The rolling section includes a plurality of calendering rollers arranged in sequence, each of which includes a first liquid inlet. The temperature control section is connected to the first liquid inlet pipelines of the plurality of calendering rollers and is used to supply a temperature transfer agent to the plurality of calendering rollers. The cooling section includes a plurality of coolers, each of which is connected to the first liquid inlet pipeline of a calendering roller. Each cooler has a first regulating valve that is used to adjust the cooling capacity of the corresponding cooler to adjust the temperature of the temperature transfer agent flowing therethrough. With this arrangement, the temperature of the temperature transfer agent flowing to different calendering rollers can be adjusted by adjusting the cooling capacity of the corresponding cooler with different first regulating valves, thereby enabling convenient adjustment of the roller surface temperature of different calendering rollers. Furthermore, the coordination of the multiple first regulating valves and the coolers also enables multiple calendering rollers to share a single temperature control section, thereby reducing the production cost of the electrode film forming equipment.

[0021] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0023] Figure 1 This is a schematic diagram of an electrode film forming device according to an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of a calendering roller in an embodiment of the present utility model.

[0025] Description of reference numerals:

[0026] 1. Calendering roller; 11. Liquid inlet chamber; 12. Liquid outlet chamber; 13. Rolling chamber; 14. Baffle; 15. First through hole; 16. Second through hole; 2. Temperature adjustment unit; 3. Cooler; 31. First regulating valve; 4. Cooling source; 5. Second regulating valve; 6. Sealing joint; 7. First reflux valve; 8. Second reflux valve. DETAILED DESCRIPTION

[0027] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0028] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0029] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0030] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0031] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0032] The utility model provides an electrode film forming device that can be used in a battery production process, wherein the battery includes an electrode piece, which can be manufactured using a dry electrode technology or a wet electrode technology.

[0033] like Figure 1 As shown, the electrode film forming equipment provided by the present invention includes:

[0034] A rolling part, the rolling part comprising a plurality of calendering rollers 1, the plurality of calendering rollers 1 are arranged in sequence, and each of the calendering rollers 1 comprises a first liquid inlet end;

[0035] A temperature regulating part 2, the temperature regulating part 2 is connected to the first liquid inlet end pipelines of the plurality of calendering rollers 1, and the temperature regulating part 2 is used to convey a temperature conducting agent to the plurality of calendering rollers 1;

[0036] The cooling section includes a plurality of coolers 3, each of which is connected to the first liquid inlet end pipeline of the calendering roller 1, and each of the coolers 3 has a first regulating valve 31, which is used to adjust the cooling capacity of the corresponding cooler 3 to adjust the temperature of the temperature conducting agent flowing through.

[0037] Specifically, the rolling part is the core component structure of the electrode film forming equipment, which includes a plurality of calendering rollers 1 arranged in a predetermined order. Figure 2 As shown, each calendering roller 1 is designed as a hollow structure, with internal channels for circulating a thermal conductivity agent to adjust the roller surface temperature. A first liquid inlet and a second liquid outlet are provided at each end of the calendering roller 1, respectively, to allow the thermal conductivity agent to circulate in and out and achieve its thermal conductivity. The surface of the calendering roller 1 can be coated with a wear-resistant and corrosion-resistant coating as needed to improve the service life of the calendering roller 1 and the calendering effect.

[0038] like Figure 1As shown, the temperature regulating part 2 is connected to the first liquid inlet end of the plurality of calendering rollers 1 through a pipeline, and the temperature regulating part 2 is used to provide a temperature-conducting agent with a suitable temperature to the plurality of calendering rollers 1. The temperature regulating part 2 may contain a heating element and a temperature control system, which can heat or keep the temperature-conducting agent warm according to the preset temperature parameters. In addition, the temperature regulating part 2 may also be provided with a pump or other power device to ensure that the temperature-conducting agent can circulate in the entire electrode film forming equipment. A first reflux valve 7 and a second reflux valve 8 may also be provided respectively, and the first reflux valve 7 and the second reflux valve 8 are used to balance the pressure in the pipeline.

[0039] like Figure 1 As shown, the cooling section is composed of a plurality of coolers 3, which are arranged between the first liquid inlet end of the calendering roller 1 and the temperature regulating section 2. One end of the cooler 3 is connected to the first liquid inlet end pipeline of the corresponding calendering roller 1, and the other end of the cooler 3 is connected to the pipeline of the temperature regulating section 2, so that the temperature conducting agent transported by the temperature regulating section 2 can flow to the calendering roller 1 after being cooled by the cooler 3.

[0040] The cooler 3 is internally designed with a cooling medium flow channel and is equipped with a first regulating valve 31. The first regulating valve 31 can adjust the flow rate or temperature of the cooling medium according to actual needs, thereby adjusting the cooling capacity of the cooler 3 and achieving precise control of the temperature of the thermal conductivity agent flowing through the cooler 3. In this way, by adjusting the cooling capacity of each cooler 3, the temperature of different calendering rollers 1 can be independently controlled, thereby meeting the temperature requirements of different stages in the electrode film forming process, ensuring that the electrode material can always be kept in a good temperature range during the calendering process, and avoiding problems such as abnormal film quality caused by excessively high or low temperatures.

[0041] Furthermore, the cooling capacity of the corresponding cooler 3 can be adjusted using different first regulating valves 31 to adjust the temperature of the heat transfer agent flowing to different calendering rollers 1, thereby enabling convenient adjustment of the roller surface temperature of different calendering rollers 1. Furthermore, the coordination of multiple first regulating valves 31 and coolers 3 also allows multiple calendering rollers 1 to share a single temperature regulating unit 2, thereby reducing the production cost of the electrode film-forming equipment and facilitating the miniaturization of the electrode film-forming equipment.

[0042] In addition, the energy consumption of the electrode film forming equipment can be reduced by optimizing the design of the cooler 3 and accurately controlling the first regulating valve 31. The cooling capacity of the cooler 3 can be adjusted according to actual needs, which can also avoid unnecessary energy waste.

[0043] Optionally, the opening degrees of at least some of the first regulating valves 31 are different.

[0044] Specifically, the openings of some of the first regulating valves 31 can be set to different degrees, while the openings of other parts of the first regulating valves 31 can be set to the same degree, so that the temperatures of the temperature conducting agents flowing to different calendering rollers 1 are partially the same and partially different; the openings of all the first regulating valves 31 can also be set to different degrees, so that the temperatures of the temperature conducting agents flowing to different calendering rollers 1 are different, thereby being able to adjust different roller surface temperatures to adapt to different film forming needs.

[0045] Optionally, the cooling part also includes a cooling source 4, the cooler 3 includes a cooling plate, and a third liquid inlet and a third liquid outlet located on both sides of the cooling plate, the third liquid inlet and the third liquid outlet are respectively connected to the cooling source 4 pipeline, the first regulating valve 31 is located between the third liquid inlet and the cooling source 4, the first regulating valve 31 can adjust the flow rate and / or speed of the coolant flowing to the cooling plate to adjust the cooling capacity of the corresponding cooler 3.

[0046] like Figure 1 As shown, the cooling source 4 is used to deliver coolant to the multiple coolers 3 to ensure the cooling capacity of the multiple coolers 3. The third liquid inlet end is connected to the liquid outlet end of the cooling source 4 through a pipeline, and the third liquid outlet end is connected to the liquid inlet end of the cooling source 4 through a pipeline, so that the coolant can circulate between the cooling source 4 and the coolers 3.

[0047] Among them, the first regulating valve 31 is located between the third liquid inlet end and the liquid outlet end of the cooling source 4, so that the flow rate of the coolant flowing to the cooling plate can be adjusted by adjusting the opening of the first regulating valve 31, thereby adjusting the cooling capacity of the corresponding cooler 3.

[0048] Optionally, each of the calendering rollers 1 further includes a first liquid outlet end, and the temperature regulating part 2 includes a second liquid inlet end and a second liquid outlet end, the second liquid outlet end is connected to a plurality of the first liquid inlet end pipelines, and the second liquid inlet end is connected to a plurality of the first liquid outlet end pipelines, so that the temperature conducting agent can circulate between the calendering roller 1 and the temperature regulating part 2, and it is also convenient to control the temperature of the temperature conducting agent flowing to the calendering roller 1 through the temperature regulating part 2.

[0049] Optionally, a plurality of second regulating valves 5 are further included, wherein the second regulating valve 5 is provided between the second liquid outlet and one of the coolers 3 , and the second regulating valve 5 is used to regulate the flow of the temperature conducting agent flowing to the corresponding calendering roller 1 .

[0050] like Figure 1 As shown, a second regulating valve 5 can be set between the second liquid outlet and different coolers 3. The second regulating valve 5 can adjust the flow rate of the temperature conductor flowing to the corresponding cooler 3 and the corresponding calendering roller 1, so as to adjust the rolling temperature and rolling effect of different calendering rollers 1, and also enable the second regulating valve 5 to cooperate with the first regulating valve 31 to achieve precise control of the temperature of the temperature conductor flowing in the calendering roller 1.

[0051] Optionally, the opening degrees of at least some of the second regulating valves 5 are different.

[0052] Specifically, the openings of some of the second regulating valves 5 can be set to different degrees, while the openings of other second regulating valves 5 can be set to the same degree; or the openings of all the second regulating valves 5 can be set to different degrees, so that multiple second regulating valves 5 can cooperate with multiple first regulating valves 31 to achieve precise control of the temperature of the temperature conducting agent flowing in different calendering rollers 1, thereby adjusting different roller surface temperatures to adapt to different film forming needs.

[0053] Optionally, the calendering roller 1 has a hollow sandwich structure, and the calendering roller 1 has a liquid inlet chamber 11, a liquid outlet chamber 12 and a rolling chamber 13. The rolling chamber 13 is located outside the liquid inlet chamber 11 and the liquid outlet chamber 12. One end of the rolling chamber 13 is connected to the liquid inlet chamber 11, and the other end of the rolling chamber 13 is connected to the liquid outlet chamber 12, and the liquid inlet chamber 11 is connected to the first liquid inlet end pipeline.

[0054] like Figure 2 As shown, the calendering roller 1 has two inner and outer cavities, and the internal cavity forms an interval liquid inlet cavity 11 and a liquid outlet cavity 12. The liquid inlet cavity 11 is connected to the first liquid inlet end pipeline, and the liquid outlet cavity 12 is connected to the temperature adjustment part 2 pipeline, so that the temperature conducting agent can flow into the liquid inlet cavity 11 from the first liquid inlet end and flow back to the temperature adjustment part 2 from the liquid outlet cavity 12 after passing through the roller pressing cavity 13, so as to facilitate the recycling of the temperature conducting agent.

[0055] The external cavity forms a rolling cavity 13 , and the temperature of the roller surface of the rolling cavity 13 can be adjusted by using a temperature conducting agent flowing in the rolling cavity 13 , so as to adapt to different film forming requirements.

[0056] Optionally, the calendering roller 1 also includes a first liquid outlet end, which is connected to the pipeline of the liquid outlet chamber 12, so that the temperature conducting agent can flow from the first liquid inlet end into the liquid inlet chamber 11, pass through the roller pressing chamber 13 and the liquid outlet chamber 12 in sequence, and then flow back to the temperature-control part 2 from the first liquid outlet end, so as to facilitate the recycling of the temperature conducting agent.

[0057] Optionally, a plurality of baffles 14 are provided in the rolling chamber 13, and the plurality of baffles 14 divide the rolling chamber 13 into a plurality of flow channels. Figure 2 As shown, the arrangement of multiple baffles 14 enables multiple flow channels for the flow of the temperature conducting agent to be formed in the rolling chamber 13, thereby dispersing the temperature conducting agent, facilitating the uniform and orderly flow of the temperature conducting agent, and also facilitating improving the uniformity of the roller surface temperature of the calendering roller 1.

[0058] Optionally, the calendering roller 1 is provided with a first through hole 15 and a second through hole 16 , wherein the first through hole 15 connects one end of the rolling chamber 13 with the liquid inlet chamber 11 , and the second through hole 16 connects the other end of the rolling chamber 13 with the liquid outlet chamber 12 .

[0059] like Figure 2 As shown, the arrangement of the first through hole 15 and the second through hole 16 enables the temperature conducting agent flowing into the liquid inlet chamber 11 from the first liquid inlet end to flow into the roller pressing chamber 13 through the first through hole 15, and then flow to the liquid outlet chamber 12 through the second through hole 16 after passing through the roller surface, and finally flow back to the temperature-regulating part 2 from the first liquid outlet end, so as to facilitate the recycling of the temperature conducting agent.

[0060] Optionally, the first through holes 15 and the second through holes 16 are arranged along the flow direction of the thermal conductive agent.

[0061] like Figure 2 As shown, the first through-hole 15 and the second through-hole 16 are located at both ends of the calendering roller 1, and are arranged along the flow direction of the temperature conducting agent in the rolling chamber 13. This allows the temperature conducting agent flowing into the rolling chamber 13 from the first through-hole 15 to pass through a larger area of ​​the roller surface before flowing out from the second through-hole 16. This facilitates adjustment of the roller surface temperature of the calendering roller 1 and improves the uniformity of the roller surface temperature of the calendering roller 1. In addition, the number of the first through-hole 15 and the second through-hole 16 can also be adjusted according to actual needs.

[0062] like Figure 2 As shown, a sealing joint 6 can also be provided between the cooler 3 and the first liquid inlet end of the calendering roller 1, which can form a sealing and reinforcement effect on the connection between the two and also facilitate the insulation of the temperature conducting agent.

[0063] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0064] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art will appreciate that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An electrode film forming device, characterized in that: include: A rolling section, the rolling section comprising a plurality of calendering rollers (1), the plurality of calendering rollers (1) being arranged in sequence, and each of the calendering rollers (1) comprising a first liquid inlet end; A temperature regulating part (2), the temperature regulating part (2) being connected to the first liquid inlet end pipelines of the plurality of calendering rollers (1), and the temperature regulating part (2) being used for conveying a temperature conducting agent to the plurality of calendering rollers (1); A cooling section, wherein the cooling section comprises a plurality of coolers (3), each of the coolers (3) being connected to a first liquid inlet end pipeline of a calendering roller (1), and each of the coolers (3) having a first regulating valve (31), wherein the first regulating valve (31) is used to adjust the cooling capacity of the corresponding cooler (3) so as to adjust the temperature of the temperature conducting agent flowing therethrough.

2. The electrode film forming equipment according to claim 1, characterized in that The opening degrees of at least some of the first regulating valves (31) are different.

3. The electrode film forming equipment according to claim 1, characterized in that The cooling portion further includes a cooling source (4), the cooler (3) includes a cooling plate, and a third liquid inlet and a third liquid outlet located on both sides of the cooling plate, the third liquid inlet and the third liquid outlet are respectively connected to the cooling source (4) pipeline, the first regulating valve (31) is located between the third liquid inlet and the cooling source (4), and the first regulating valve (31) can regulate the flow of the coolant flowing to the cooling plate to adjust the cooling capacity of the corresponding cooler (3).

4. The electrode film forming equipment according to claim 1, wherein: Each of the calendering rollers (1) further comprises a first liquid outlet end, and the temperature regulating portion (2) comprises a second liquid inlet end and a second liquid outlet end, wherein the second liquid outlet end is connected to a plurality of the first liquid inlet end pipelines, and the second liquid inlet end is connected to a plurality of the first liquid outlet end pipelines.

5. The electrode film forming equipment according to claim 4, characterized in that It also includes a plurality of second regulating valves (5), wherein the second regulating valves (5) are arranged between the second liquid outlet and one of the coolers (3), and the second regulating valves (5) are used to regulate the flow of the temperature conducting agent flowing to the corresponding calendering roller (1).

6. The electrode film forming equipment according to claim 5, characterized in that The opening degrees of at least some of the second regulating valves (5) are different.

7. The electrode film forming equipment according to claim 1, characterized in that The calendering roller (1) is a hollow sandwich structure, and the calendering roller (1) has a liquid inlet cavity (11), a liquid outlet cavity (12) and a roller pressure cavity (13), wherein the roller pressure cavity (13) is located outside the liquid inlet cavity (11) and the liquid outlet cavity (12), one end of the roller pressure cavity (13) is connected to the liquid inlet cavity (11), and the other end of the roller pressure cavity (13) is connected to the liquid outlet cavity (12), and the liquid inlet cavity (11) is connected to the first liquid inlet end pipeline.

8. The electrode film forming equipment according to claim 7, characterized in that: The calendering roller (1) further comprises a first liquid outlet end, wherein the first liquid outlet end is connected to a pipeline of the liquid outlet cavity (12).

9. The electrode film forming equipment according to claim 7, characterized in that: A plurality of baffles (14) are provided in the rolling chamber (13), and the plurality of baffles (14) divide the rolling chamber (13) into a plurality of flow channels.

10. The electrode film forming equipment according to claim 7, characterized in that: The calendering roller (1) is provided with a first through hole (15) and a second through hole (16), wherein the first through hole (15) connects one end of the roller pressing chamber (13) with the liquid inlet chamber (11), and the second through hole (16) connects the other end of the roller pressing chamber (13) with the liquid outlet chamber (12).

11. The electrode film forming equipment according to claim 10, characterized in that: The first through hole (15) and the second through hole (16) are arranged along the flow direction of the temperature conducting medium.

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