Processing device and battery production equipment

Abstract

The utility model relates to a processing device and battery production equipment, the processing device comprises at least two plasma modules which are sequentially arranged at intervals in the conveying direction of a target material, each plasma module comprises a generator, each generator is provided with an inner cavity, and gases in the inner cavities are different; each generator is used for ionizing gas in the respective inner cavity to form different plasmas, and the plasma module is configured to be capable of transferring the ionized plasmas to the surface of a target material to form different polar groups. The at least two plasma modules are utilized to ionize different gases to form different plasmas, different polar groups can be formed on the surface of the diaphragm, the wettability of the diaphragm to electrolyte can be effectively improved, the liquid absorption and retention capacity of the diaphragm can be improved, the cycle life of the lithium ion battery is prolonged, and the rate charge and discharge performance of the lithium ion battery is improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a processing device and a battery production equipment. Background Art

[0002] With the continuous development of new energy, the industry has put forward higher and higher requirements for the performance of lithium-ion batteries, such as energy density, fast charging and discharging, and long cycle life. The electrode assembly is the component in the battery cell where the actual electrochemical reaction occurs, and the electrode assembly is usually composed of a positive electrode sheet, a separator, and a negative electrode sheet. Among them, the separator mainly plays the role of insulation and lithium-ion transmission between the positive electrode sheet and the negative electrode sheet.

[0003] However, due to the influence of its own characteristics, the current separator has poor wettability to the electrolyte and low liquid absorption and retention capacity, which is not conducive to the transmission of lithium ions between the positive electrode sheet and the negative electrode sheet, thus affecting the long cycle life and high-rate charge and discharge of lithium-ion batteries. Summary of the Utility Model

[0004] Based on this, in view of the problem that the current separator has poor wettability to the electrolyte and low liquid absorption and retention capacity, it is necessary to provide a processing device and a battery production equipment.

[0005] In a first aspect, the present application provides a processing device for surface treatment of a target material. The processing device includes at least two plasma modules arranged at intervals in sequence along the conveying direction of the target material. Each plasma module includes a generator, the generator has an inner cavity for accommodating gas, and the gases in each of the inner cavities are different;

[0006] Wherein, each generator is used to ionize the gas in its own inner cavity to form different plasmas, and the plasma module is configured to be able to transfer the ionized plasma to the surface of the target material to form different polar groups.

[0007] Through the above structure, at least two plasma modules are used to ionize different gases to form different plasmas, so that they can be transferred to the surface of the separator or other target materials, and different polar groups are formed on the surface of the separator or other target materials. The more types of polar groups formed on the surface of the separator, the higher the adhesion force between it and the positive electrode sheet and the negative electrode sheet, thus effectively improving the wettability of the separator to the electrolyte, improving the liquid absorption and retention capacity of the separator, and further enhancing the cycle life and rate charge and discharge performance of the lithium-ion battery.

[0008] In some embodiments, the generator is arranged on at least one side of the target material along the thickness direction of the target material.

[0009] Through the above structure, different gases can be ionized smoothly to form different plasmas, and then the plasmas are transferred to one or both surfaces of the separator, so as to smoothly form different polar groups on the surface of the separator, improving the wettability and liquid absorption and retention ability of the separator.

[0010] In some embodiments, each plasma module further includes a control member and a gas supply assembly. The control member is communicatively connected to the gas supply assembly and each generator respectively. The gas supply assembly is communicated with each inner cavity. The control member is used to control the gas supply assembly to introduce different gases into each inner cavity.

[0011] Through the above structure, the gas supply assembly and each generator can be controlled flexibly and conveniently to cooperate with each other, and the plasma treatment process of the separator can be better completed.

[0012] In some embodiments, each plasma module further includes a plasma nozzle communicated with each inner cavity. The plasma nozzle is arranged towards the target material and is used to spray the plasma onto the surface of the target material.

[0013] By arranging the plasma nozzle, the plasma can be smoothly and conveniently sprayed onto the surface of the separator, thereby improving the treatment effect on the separator.

[0014] In some embodiments, the processing device includes a plurality of traction rollers arranged in sequence along the conveying direction. The traction rollers are used to wind the target material and drive the target material to move along the conveying direction. Among them, each traction roller is correspondingly arranged with each plasma module, so that the target material passes through each plasma module under the drive of the traction rollers.

[0015] Through the above structure, the conveying of the separator can be realized smoothly, and the separator passes through each plasma module in sequence during the conveying process, so that the plasma module can smoothly form polar groups on the surface of the separator.

[0016] In some embodiments, the processing device further includes an unwinding assembly and a winding assembly. The unwinding assembly is arranged upstream of all the traction rollers along the conveying direction and is used to unwind the target material. The winding assembly is arranged downstream of all the traction rollers along the conveying direction and is used to wind the target material.

[0017] Through the above structure, the transportation of the separator in the conveying direction can be realized smoothly, so that the separator passes through each plasma module in sequence, realizing the plasma treatment of the separator and smoothly forming polar groups on the surface of the separator.

[0018] In some embodiments, the processing device further includes an electrostatic elimination assembly, and the electrostatic elimination assembly is arranged between all the traction rollers and the winding assembly along the conveying direction.

[0019] Thus, by providing an electrostatic elimination component, positive and negative ions can be generated on the surface of the separator, thereby neutralizing the static electricity on the surface of the separator.

[0020] In some embodiments, the processing device further includes a deviation rectification component, which is arranged between all the traction rollers and the electrostatic elimination component along the conveying direction.

[0021] By providing the deviation rectification component, real-time deviation rectification of the separator can be performed, so that the edges of the separator always remain flush, improving the accuracy during the separator processing.

[0022] In some embodiments, the processing device further includes a visual detection component, which is arranged between the unwinding component and all the traction rollers along the conveying direction and is used to detect the size and flatness of the target material.

[0023] Thus, by providing the visual detection component, the size and flatness of the separator are detected, so that the separator is more smoothly conveyed onto the traction rollers, and the separator is processed by each plasma module, and polar groups are successfully formed on the separator.

[0024] In some embodiments, the visual detection component includes a water ripple detection piece and a width detection piece. The water ripple detection piece is used to detect the flatness of the target material, and the width detection piece is used to detect the size of the target material.

[0025] With the above structure, the flatness and size of the separator can be successfully detected, so that the separator smoothly enters the traction rollers and then undergoes ionization treatment.

[0026] In a second aspect, the present application further provides a battery production device, including the above-mentioned processing device, and the processing device can be used for surface treatment of separators, current collectors and electrode sheets.

[0027] The above-mentioned processing device and battery production device use at least two plasma modules to ionize different gases to form different plasmas, so that they can be transferred to the surface of the separator or other target materials, and different polar groups are formed on the surface of the separator or other target materials. The more types of polar groups formed on the surface of the separator, the higher the adhesion force between it and the positive electrode sheet and the negative electrode sheet. Therefore, the wettability of the separator to the electrolyte can be effectively improved, the liquid absorption and liquid retention ability of the separator can be improved, and further the cycle life and rate charge-discharge performance of the lithium-ion battery can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of a processing device according to one or more embodiments.

[0029] Figure 2 It is a schematic structural diagram of a generator in a processing device according to one or more embodiments.

[0030] Explanation of the reference numerals: 100, processing device; 201, target material; 10, plasma module; 20, exhaust gas treatment module; 30, traction roller; 40, unwinding assembly; 50, winding assembly; 60, static electricity removal assembly; 70, deviation correction assembly; 80, visual inspection assembly; 11, generator; 12, inner cavity; 13, control part; 14, air inlet; 15, air outlet; 131, control panel; 132, controller; a, conveying direction. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly stipulated and defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In this application, unless otherwise clearly stipulated and defined, if there is a description such as a first feature being "on" or "under" a second feature, its meaning may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0036] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0037] Currently, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only applied to energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely applied to electric transportation means such as electric bicycles, electric motorcycles, electric vehicles and other fields. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.

[0038] A battery cell is the smallest unit that makes up a battery. In the structure of a battery cell, it usually includes a housing and an electrode assembly accommodated in the housing. The electrode assembly is the component in the battery cell where the actual electrochemical reaction occurs, and the housing wraps around the outer periphery of the electrode assembly and can form a sealed environment to protect the electrode assembly.

[0039] The electrode assembly is mainly formed by winding or laminating a positive electrode sheet and a negative electrode sheet, and a separator is usually disposed between the positive electrode sheet and the negative electrode sheet. The separator mainly plays a role of insulating and transporting lithium ions between the positive electrode sheet and the negative electrode sheet.

[0040] The current separator is usually composed of polyethylene and polypropylene materials and has no polar groups, which results in poor wettability of the separator to the electrolyte, low liquid absorption and retention capacity of the separator, and is not conducive to the transport of lithium ions between the positive electrode sheet and the negative electrode sheet, thus affecting the long cycle life and high-rate charge and discharge of the lithium-ion battery.

[0041] Based on the above considerations, in order to solve the problems of poor wettability of the current separator to the electrolyte and low liquid absorption and retention capacity, one or more embodiments of the present application provide a processing device. When the processing device is applied to the surface treatment of the separator, at least two plasma modules can ionize different gases to form different plasmas, so that they can be transferred to the surface of the separator and form different polar groups on the surface of the separator. The more types of polar groups formed on the surface of the separator, the higher the adhesion force between the separator and the positive electrode sheet and the negative electrode sheet, thereby effectively improving the wettability of the separator to the electrolyte, improving the liquid absorption and retention capacity of the separator, and further enhancing the cycle life and rate charge and discharge performance of the lithium-ion battery.

[0042] Refer to Figure 1 As shown in, an embodiment of the present application provides a processing device 100 for the surface treatment of a target material 201. The processing device 100 includes at least two plasma modules 10 sequentially arranged at intervals along the conveying direction a of the target material 201. Each plasma module 10 includes a generator 11. The generator 11 has an inner cavity 12 for accommodating gas, and the gases in each inner cavity 11 are different. Among them, each generator 11 is used to ionize the gas in its respective inner cavity 12 to form different plasmas, and the plasma module 10 is configured to be able to transfer the ionized plasma to the surface of the target material 201 to form different polar groups.

[0043] It should be noted that the target material 201 may be, but is not limited to, a separator. A conveying roller or other conveying device can be used to convey the separator so that the separator moves along the conveying direction a.

[0044] The plasma module 10 refers to a structure that can perform ionization treatment on gas to ionize gas molecules to form a large number of active particles. When the active particles are transferred to the surface of the separator, a graft polymerization reaction is initiated, and polar groups can be formed on the surface of the separator.

[0045] Further, at least two plasma modules 10 are provided, and the plasma modules 10 are sequentially arranged at intervals along the conveying direction a. In this way, different plasma modules 10 can be used to ionize different gases to form different plasmas. Thus, different plasmas form different polar groups on the surface of the separator. The more types of polar groups, the higher the adhesion between the separator and the positive electrode sheet and the negative electrode sheet. This is because the polar groups such as carboxyl, hydroxyl, amino, and fluorine grafted on the separator have dipole-dipole interactions with the hydroxyl, carboxyl, and fluorine elements contained in carboxymethyl cellulose (CMC), polyvinylidene fluoride (PVDF), etc. in the positive electrode material or the negative electrode material.

[0046] In addition, if the separator needs to be coated with ceramics or polymers in subsequent processes, the adhesion between the coating and the separator containing multiple polar groups will also be stronger.

[0047] Based on this, by providing at least two plasma modules 10, different gases can be ionized to form different plasmas, and then different polar groups can be formed on the surface of the separator, improving the wettability of the separator to the electrode liquid and simultaneously enhancing the liquid absorption and retention ability of the separator.

[0048] As a specific embodiment, the number of plasma modules 10 can be set to two, three, four, or five, and they are sequentially arranged at intervals along the conveying direction a. When the separator passes through each plasma module 10, a kind of polar group is formed on the separator, and finally multiple polar groups are successfully formed on the separator, so as to better improve the wettability of the separator to the electrode liquid and the liquid absorption and retention ability of the separator.

[0049] With the above structure, at least two plasma modules 10 are used to ionize different gases to form different plasmas, which can then be transferred to the surface of the separator or other target materials 201, and different polar groups are formed on the surface of the separator or other target materials 201. The more types of polar groups formed on the surface of the separator, the higher the adhesion between it and the positive electrode sheet and the negative electrode sheet, so as to effectively improve the wettability of the separator to the electrolyte, enhance the liquid absorption and retention ability of the separator, and further improve the cycle life and rate charge-discharge performance of the lithium-ion battery.

[0050] In some embodiments, the polar groups formed on the surface of the target material 201 include at least two of oxygen-containing groups, fluorine-containing groups, nitro groups, nitroso groups, cyano groups, amino groups, and sulfonic acid groups.

[0051] Specifically, by providing different gases, different gases are ionized under the ionization action of the plasma module 10 to form different plasmas, and then the plasmas are transferred to the surface of the separator, so as to form different polar groups on the surface of the separator.

[0052] Among them, the provided gas can be, but is not limited to, oxygen, nitrogen, carbon tetrafluoride, etc.

[0053] The polar groups formed on the separator can be two or more of oxygen-containing groups, fluorine-containing groups, nitro groups, nitroso groups, cyano groups, amino groups, and sulfonic acid groups. For example, when two plasma modules 10 are provided, the polar groups formed on the separator can be oxygen-containing groups and fluorine-containing groups, or fluorine-containing groups and nitro groups. Of course, other two groups are also possible and will not be elaborated here.

[0054] When five plasma modules 10 are provided, oxygen-containing groups, fluorine-containing groups, nitro groups or nitroso groups, cyano groups, amino groups, and sulfonic acid groups can be introduced onto the separator simultaneously.

[0055] By introducing a variety of different polar groups on the surface of the separator, the wettability and liquid absorption and retention ability of the separator can be further improved, thereby improving the cycle life and rate charge-discharge performance of the lithium-ion battery.

[0056] In some embodiments, the generator 11 is disposed on at least one side of the target material 201 along the thickness direction of the target material 201.

[0057] Specifically, the generator 11 refers to a plasma generator 11 that can ionize gas molecules through plasma discharge to generate active particles.

[0058] The generator 11 can be disposed on one side surface of the separator or on both side surfaces of the separator simultaneously. When the generator 11 is disposed on one side of the separator, the generator 11 can transfer the ionized active particles to this side surface of the separator, so that the active particles correspondingly form polar groups on this side surface.

[0059] The generator 11 can also be disposed on both side surfaces of the separator simultaneously. In this way, the generators 11 on both sides of the separator ionize the gas and form active particles respectively, and then transfer them to both side surfaces of the separator respectively, so that polar groups are formed on both side surfaces of the separator respectively.

[0060] When the generator 11 is disposed on the opposite side surfaces of the separator simultaneously, both side surfaces of the separator can be processed simultaneously, improving the efficiency.

[0061] Furthermore, each generator 11 has an inner cavity 12, and an air inlet 14 and an air outlet 15 communicating with the inner cavity 12 can be opened on the generator 11. Different gases are correspondingly provided into the inner cavity 12 through the air inlet 14 to facilitate the formation of different polar groups on the separator.

[0062] In addition, the processing device 100 may further include an exhaust gas treatment module 20. The air outlet 15 may be communicated with the exhaust gas treatment module 20 through a pipeline, and the processed exhaust gas in the inner cavity 12 is transferred to the exhaust gas treatment module 20 through the pipeline, and then discharged after being processed by the exhaust gas treatment module 20.

[0063] With the above structure, different gases can be ionized smoothly to form different plasmas, and then the plasmas are transferred to one or both surfaces of the separator, so as to form different polar groups smoothly on the surface of the separator, improving the wettability and liquid absorption and retention ability of the separator.

[0064] In some embodiments, the discharge mode of the generator 11 is one of DC discharge, dielectric barrier discharge, pulsed discharge, radio frequency discharge, microwave discharge or arc discharge.

[0065] Specifically, the discharge mode of the generator 11 can adopt various modes, and can be specifically adjusted according to the type of gas to be ionized actually.

[0066] Therefore, setting the discharge mode of the generator 11 to one of the above modes can better adjust the ionization effect according to different gases, so as to form polar groups smoothly on the surface of the separator.

[0067] In addition, the processing mode of the generator 11 can be continuous processing or intermittent processing. Specifically, the processing power of the generator 11 can be set to 1 W to 1000 kW, and the intensities of plasma processing in different segments can be set to be the same or different.

[0068] The excitation voltage of the generator 11 can be set to 1 kV to 99 kV, the frequency is set to 1 Hz to 2.5 GHz, the effective plasma processing height can be set to 0.1 mm to 10 mm, and the carrier gas flow rate of the controller 132 can be set to 1 L / min to 300 L / min. It can be understood that the above specific parameters can be adjusted accordingly according to the different types of gases to be ionized actually, and will not be elaborated here.

[0069] In some embodiments, each plasma module 10 further includes a control member 13 and a gas supply assembly (not shown in the figure). The control member 13 is respectively communicatively connected with the gas supply assembly and each generator 11. The gas supply assembly is communicated with each inner cavity 12, and the control member 13 is used to control the gas supply assembly to introduce different gases into each inner cavity 12.

[0070] Specifically, the control member 13 may include a control panel 131 and a controller 132. Among them, the control panel 131 and the controller 132 are connected to each other, and the operating parameters of the device can be displayed on the control panel 131, so as to facilitate the control of the processing process.

[0071] The gas supply assembly refers to a device that can supply different gases to different inner cavities 12. The gas supply assembly is connected to the air inlet 14 on the inner cavity 12 through a pipeline, and a control valve can be set on the pipeline. The control valve is communicatively connected to the controller 132, and the controller 132 can be used to control the opening and closing of the control valve.

[0072] In this way, when the controller 132 opens the control valve, different gases can be introduced into the inner cavity 12 by using the gas supply assembly. At the same time, the controller 132 controls the generator 11 to ionize the gas in the inner cavity 12, thereby generating plasma, and then transferring it to the surface of the diaphragm, so as to achieve the effect of grafting polar groups on the surface of the diaphragm and improving the surface polarity of the diaphragm.

[0073] Through the above structure, the gas supply assembly and each generator 11 can be flexibly and conveniently controlled to cooperate with each other, and the plasma treatment process of the diaphragm can be better completed.

[0074] Please also refer to Figure 1 and Figure 2 In some embodiments, each plasma module 10 further includes a plasma nozzle (not shown in the figure) communicated with each inner cavity 12. The plasma nozzle is arranged towards the target material 201 and is used to spray plasma onto the surface of the target material 201.

[0075] Specifically, after the generator 11 ionizes the gas in the inner cavity 12, plasma is generated, and then the plasma nozzle can smoothly spray the plasma onto the surface of the diaphragm, so as to graft polar groups on the surface of the diaphragm and improve the polarity of the surface of the diaphragm.

[0076] By setting the plasma nozzle, the plasma can be smoothly and conveniently sprayed onto the surface of the diaphragm, thereby improving the treatment effect on the diaphragm.

[0077] In some embodiments, the processing device 100 includes a plurality of traction rollers 30 sequentially arranged along the conveying direction a. The traction rollers 30 are used to wind the target material 201 and drive the target material 201 to move along the conveying direction a. Among them, each traction roller 30 is correspondingly arranged with each plasma module 10, so that the target material 201 passes through each plasma module 10 under the drive of the traction roller 30.

[0078] Specifically, the traction roller 30 is rotatably arranged, the diaphragm is wound around the traction roller 30, and the rotation of the traction roller 30 can drive the diaphragm to move, so as to achieve the purpose of transporting the diaphragm along the conveying direction a.

[0079] Furthermore, each group of traction rollers 30 is correspondingly arranged with one of the plasma modules 10, so that the diaphragm can smoothly pass through each plasma module 10 under the drive of the traction roller 30, and thus polar groups can be smoothly formed on the surface of the diaphragm.

[0080] Among them, the specific number of the traction rollers 30 can be adjusted according to the number of the plasma modules 10 in the actual application process, which will not be elaborated here.

[0081] Through the above structure, the conveying of the diaphragm can be smoothly realized, and the diaphragm passes through each plasma module 10 in turn during the conveying process, so that the plasma module 10 can smoothly form polar groups on the surface of the diaphragm.

[0082] In some embodiments, the processing device 100 further includes an unwinding assembly 40 and a winding assembly 50. The unwinding assembly 40 is arranged upstream of all the traction rollers 30 along the conveying direction a and is used for unwinding the target material 201. The winding assembly 50 is arranged downstream of all the traction rollers 30 along the conveying direction a and is used for winding the target material 201.

[0083] Specifically, the unwinding assembly 40 is arranged upstream of all the traction rollers 30 along the conveying direction a, and can be used for unwinding the diaphragm coil material, so that the diaphragm coil material can be smoothly wound around each traction roller 30 and is smoothly transferred under the drive of the traction roller 30.

[0084] The winding assembly 50 is arranged downstream of all the traction rollers 30 along the conveying direction a, and can be used for winding the diaphragm after plasma treatment.

[0085] Through the above structure, the transportation of the diaphragm in the conveying direction a can be smoothly realized, so that the diaphragm passes through each plasma module 10 in turn, the plasma treatment of the diaphragm is realized, and the purpose of smoothly forming polar groups on the surface of the diaphragm is achieved.

[0086] In addition, the winding and unwinding speeds can be set to 0.1 m / min to 300 m / min, and the winding and unwinding directions can be adjusted according to actual needs, so as to realize reversible winding and unwinding.

[0087] Furthermore, both the winding assembly 50 and the unwinding assembly 40 can provide the driving force through a servo motor and a speed reducer, perform automatic winding and unwinding according to a tension sensor, and the winding and unwinding speeds can be freely adjusted.

[0088] In some embodiments, the processing device 100 further includes an electrostatic elimination assembly 60. The electrostatic elimination assembly 60 is arranged between all the traction rollers 30 and the winding assembly 50 along the conveying direction a.

[0089] Specifically, the electrostatic elimination assembly 60 can include multiple electrostatic elimination ion air bars. After the diaphragm passes through each plasma module 10 in turn under the drive of each traction roller 30 for ionization treatment, the diaphragm can be moved to the electrostatic elimination assembly 60, and a voltage is applied through the electrostatic elimination assembly 60 to generate positive and negative ions on the surface of the diaphragm, thereby neutralizing the static electricity on the surface of the diaphragm.

[0090] Thus, by providing the static elimination component 60, positive and negative ions can be generated on the surface of the separator, thereby neutralizing the static electricity on the surface of the separator.

[0091] In some embodiments, the processing device 100 further includes a deviation rectifying component 70, and the deviation rectifying component 70 is disposed between all the traction rollers 30 and the static elimination component 60 along the conveying direction a.

[0092] Specifically, the deviation rectifying component 70 may include a deviation rectifying sensor and a deviation rectifying controller 132. The deviation rectifying sensor can collect the offset of the product edge in real time and feedback it to the deviation rectifying controller 132 in real time. The deviation rectifying controller 132 outputs a signal to control the lateral movement adjustment of the reel by the motor driver, so that the edge of the coiled material is always at the center position of the deviation rectifying radar, achieving the effect that the edge of the separator always remains flush.

[0093] In addition, the deviation rectifying radar probe module can be manually adjusted by a lead screw, so as to have a manual locking function.

[0094] By providing the deviation rectifying component 70, the separator can be deviation rectified in real time, so that the edge of the separator always remains flush, improving the accuracy in the process of separator processing.

[0095] In some embodiments, the processing device 100 further includes a visual detection component 80, and the visual detection component 80 is disposed between the unwinding component 40 and all the traction rollers 30 along the conveying direction a and is used to detect the size and flatness of the target material 201.

[0096] Specifically, the visual detection component 80 is disposed between the unwinding component 40 and the traction rollers 30 along the conveying direction a. After the separator is unwound by the unwinding component 40, the size and flatness of the separator can be detected by the visual detection component 80, ensuring that the separator is conveyed to each traction roller 30 in a flat state, and then the separator is processed by each plasma module 10, and polar groups are successfully formed on the separator.

[0097] Thus, by providing the visual detection component 80 to detect the size and flatness of the separator, the separator can be conveyed to the traction rollers 30 more smoothly, and the separator is processed by each plasma module 10, and polar groups are successfully formed on the separator.

[0098] In some embodiments, the visual detection component 80 includes a water ripple detection member (not shown in the figure) and a width detection member (not shown in the figure). The water ripple detection member is used to detect the flatness of the target material 201, and the width detection member is used to detect the size of the target material 201.

[0099] Specifically, the water ripple detector can adopt a dual-camera configuration. After the camera receives the trigger signal, it captures an image, then performs algorithm processing on the image of the diaphragm, gives an OK or NG signal, and then runs the software to perform corresponding action processing, such as stopping or beeping an alarm prompt.

[0100] Similarly, the width detector can also perform corresponding action processing according to the given OK or NG signal.

[0101] Through the above structure, the flatness and size of the diaphragm can be smoothly detected, enabling the diaphragm to smoothly enter the traction roller 30 and then undergo ionization treatment.

[0102] Based on the same concept as the above processing device 100, the present application also provides a battery production device, including the above-mentioned processing device 100, and the processing device 100 can be used for surface treatment of diaphragms, current collectors, and electrode sheets.

[0103] According to one or more embodiments, in the actual application of the present application, different gases are first introduced into the inner cavity 12 of each generator 11. At the same time, the unwinding assembly 40 unwinds the diaphragm, and the water ripple detector and the width detector are used to detect the flatness and width of the diaphragm respectively, so that the diaphragm can smoothly enter the traction roller 30.

[0104] Driven by the traction roller 30, the diaphragm passes through each plasma module 10 in turn. Atmospheric pressure cold plasma is used in each plasma module 10. When receiving the start-up signal, the controller 132 opens the control valve to deliver the preset gas in the gas supply assembly to the inner cavity 12 of the generator 11. The generator 11 ionizes the gas in the inner cavity 12 to generate plasma, and then uses the plasma nozzle to spray it onto the surface of the diaphragm to graft different polar groups on the diaphragm surface.

[0105] The diaphragm after processing uses an electrostatic elimination device to generate positive and negative ions on the diaphragm surface, thereby neutralizing the static electricity on the diaphragm surface.

[0106] After the electrostatic elimination treatment, the deviation rectifying assembly 70 is used to correct the deviation of the diaphragm to keep the edges of the diaphragm flush, and finally it is wound by the winding assembly 50.

[0107] After being processed by the above processing device, two or more polar groups are formed on the diaphragm, thereby improving the wettability of the diaphragm to the electrolyte and the liquid absorption and liquid retention ability, and further enhancing the cycle life and rate performance of the lithium-ion battery.

[0108] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0109] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A processing device, characterized in that: For surface treatment of a target material, the treatment device comprises at least two plasma modules arranged in sequence and spaced apart along a conveying direction of the target material, each of the plasma modules comprises a generator, the generator has an inner cavity for containing a gas, and the gas in each inner cavity is different; Wherein, each of the generators is used to ionize the gas in the respective inner cavity to form different plasmas, and the plasma module is configured to transfer the ionized plasma to the surface of the target material to form different polar groups.

2. The processing device according to claim 1, characterized in that The generator is disposed on at least one side of the target material along a thickness direction of the target material.

3. The processing device according to claim 1 or 2, characterized in that: Each of the plasma modules further includes a control component and a gas supply assembly. The control component is respectively connected to the gas supply assembly and each of the generators in communication. The gas supply assembly is connected to each of the inner cavities. The control component is used to control the gas supply assembly to introduce different gases into each of the inner cavities.

4. The processing device according to claim 3, characterized in that Each of the plasma modules further comprises a plasma nozzle connected to each of the inner cavities. The plasma nozzle is arranged toward the target material and is used for spraying plasma toward the surface of the target material.

5. The processing device according to claim 1, characterized in that The processing device comprises a plurality of traction rollers arranged in sequence along the conveying direction, the traction rollers being used to wind the target material and drive the target material to move along the conveying direction; Wherein, each of the traction rollers is arranged corresponding to each of the plasma modules, so that the target material passes through each of the plasma modules under the driving of the traction rollers.

6. The processing device according to claim 5, characterized in that The processing device also includes an unwinding component and a winding component. The unwinding component is arranged upstream of all the traction rollers along the conveying direction and is used to unwind the target material. The winding component is arranged downstream of all the traction rollers along the conveying direction and is used to wind up the target material.

7. The processing device according to claim 6, characterized in that The processing device also includes a static electricity removal component, and the static electricity removal component is arranged between all the traction rollers and the winding component along the conveying direction.

8. The processing device according to claim 7, characterized in that The processing device also includes a deviation correction component, which is arranged between all the traction rollers and the static electricity removal component along the conveying direction.

9. The processing device according to claim 6, characterized in that The processing device further comprises a visual detection component, which is disposed between the unwinding component and all the traction rollers along the conveying direction and is used to detect the size and flatness of the target material.

10. The processing device according to claim 9, characterized in that The visual detection component includes a water ripple detection component and a width detection component. The water ripple detection component is used to detect the flatness of the target material, and the width detection component is used to detect the size of the target material.

11. A battery production device, characterized in that: It comprises a processing device as described in any one of claims 1 to 10, and the processing device can be used for surface treatment of separators, current collectors and pole pieces.

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