Heating plate, electromagnetic heating device and composite device
By adopting the electromagnetic heating principle in the battery manufacturing process, using electromagnetic coils and sensors to achieve uniform heating of the surface of the heating part, the problems of insufficient temperature uniformity and thermal efficiency of the existing heating oven are solved, and the heating effect and quality are improved.
Patent Information
- Application Number
- CN202422026174.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-20
AI Technical Summary
During the battery manufacturing process, the temperature uniformity and thermal efficiency of the heating plate surface are limited, resulting in poor heating effect.
Using the principle of electromagnetic heating, a magnetic field is generated on the surface of the heating element through the electromagnetic coil, a eddy current effect and inherent resistance are used to generate heat energy, and a sensor detects the temperature in real time, and the controller adjusts the current to achieve precise control.
The uniformity and efficiency of heating temperature are achieved, and the heating effect and quality are improved.
Smart Images
Figure CN222996702U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery manufacturing, and more specifically, to a heating plate, an electromagnetic heating device and a composite device. Background Art
[0002] In the process of battery manufacturing, it is necessary to heat and keep warm the materials so that the positive electrode sheet, the negative electrode sheet and the separator are heated and rolled by a heating roller to form a composite sheet. Currently, an oven is usually used for heating.
[0003] Some of the existing ovens use a heating pipe to be integrally cast to form a heating aluminum plate, and some use a heating pipe as a heat source to heat the aluminum plate. The principle is to make an electric current pass through the heating pipe so that the heating pipe generates heat and transfers the heat to the surface of the heating plate through heat conduction. However, this heating method makes the temperature uniformity of the surface of the heating plate easily affected by the power of the heating pipe itself and the arrangement method, resulting in limited temperature uniformity and thermal efficiency of the oven heating plate surface, and reducing the heating effect. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a heating plate, an electromagnetic heating device and a composite device, which use the principle of electromagnetic heating to heat the electrode sheet or the separator, so that the heating temperature can be more uniform, thereby increasing the viscosity between the separator and the electrode sheet, and thus improving the heating effect.
[0005] The embodiments of the utility model are implemented as follows:
[0006] In a first aspect, the utility model provides a heating plate, comprising:
[0007] A heating element, which is provided with a first mounting hole and a second mounting hole;
[0008] An electromagnetic coil, which is arranged in the first mounting hole;
[0009] A sensor, which is arranged in the second mounting hole;
[0010] A controller, which is connected to both the electromagnetic coil and the sensor.
[0011] In an alternative embodiment, the number of the first mounting holes and the electromagnetic coils are both multiple, and the multiple electromagnetic coils are respectively arranged in the multiple first mounting holes in a one-to-one correspondence.
[0012] In an alternative embodiment, the number of the second mounting holes and the sensors are both multiple, and the multiple sensors are respectively arranged in the multiple second mounting holes in a one-to-one correspondence.
[0013] In an alternative embodiment, the number of the second mounting holes and the sensors are both two. The two second mounting holes are respectively located on both sides of the first mounting hole, and the two sensors are respectively arranged in the two second mounting holes.
[0014] In an alternative embodiment, the heating plate further includes a support shaft. The support shaft is arranged in the first mounting hole, and the electromagnetic coil is sleeved outside the support shaft.
[0015] In an alternative embodiment, the heating plate further includes a partition plate. The partition plate is arranged on both sides of the heating element.
[0016] In an alternative embodiment, the first mounting hole is linear, so that the electromagnetic coils are arranged linearly along the first mounting hole;
[0017] Or, the first mounting hole is a spiral polygon, so that the electromagnetic coils are arranged in a spiral polygon along the first mounting hole;
[0018] Or, the first mounting hole is a spiral circle, so that the electromagnetic coils are arranged in a spiral circle along the first mounting hole.
[0019] In a second aspect, the present invention provides an electromagnetic heating device, including a support base, a lifting member, a passing roller, and two heating plates as described in any one of the foregoing embodiments. The two heating plates are arranged in parallel on the support base. The lifting member is arranged on the support base, and the lifting member is connected to one of the heating plates for driving one of the heating plates to lift relative to the other heating plate; the passing roller is arranged on the support base, and the passing roller is used for conveying the pole piece.
[0020] In a third aspect, the present invention provides a composite device, including a negative electrode tape, a first positive electrode tape, a second positive electrode tape, and an electromagnetic heating device as described in any one of the foregoing embodiments. The number of the electromagnetic heating devices is three, and the three electromagnetic heating devices are respectively arranged on the negative electrode tape, the first positive electrode tape, and the second positive electrode tape.
[0021] In an alternative embodiment, the composite device further includes a first cutting knife and a second cutting knife. The first cutting knife is arranged on the first positive electrode tape, and the second cutting knife is arranged on the second positive electrode tape.
[0022] The beneficial effects of the heating plate, electromagnetic heating device, and composite device provided by the embodiments of the present utility model include: the controller energizes the electromagnetic coil to generate a magnetic field. When the magnetic force lines of the generated magnetic field pass through the surface of the heating element, an eddy current effect will be generated inside the surface of the heating element. Due to the inherent resistance of the heating element, a large amount of heat energy will be generated, which can cause the surface of the heating element to heat up quickly by itself, and the heating is more uniform compared to the existing heating methods such as heating rods; moreover, by arranging the sensor in the second mounting hole of the heating element to detect the temperature of the heating element in real time, the controller receives the temperature obtained by the sensor and adjusts the current input to the electromagnetic coil based on this temperature, thereby achieving precise control of the surface temperature of the heating element and effectively improving the heating efficiency and heating quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0024] Figure 1 Structural schematic diagram of the composite device provided by the embodiments of the present utility model;
[0025] Figure 2 Structural schematic diagram of the electromagnetic heating device provided by the embodiments of the present utility model;
[0026] Figure 3 Structural schematic diagram of the first embodiment of the heating plate provided by the embodiments of the present utility model;
[0027] Figure 4 Structural schematic diagram of the second embodiment of the heating plate provided by the embodiments of the present utility model;
[0028] Figure 5 Structural schematic diagram of the third embodiment of the heating plate provided by the embodiments of the present utility model.
[0029] Reference numerals: 1 - composite device; 10 - electromagnetic heating device; 11 - negative material tape; 12 - first positive material tape; 13 - second positive material tape; 14 - negative rolling roller; 15 - positive rolling roller; 16 - first cutter; 17 - second cutter; 100 - heating plate; 110 - heating element; 111 - first mounting hole; 112 - second mounting hole; 120 - electromagnetic coil; 130 - sensor; 140 - controller; 150 - support shaft; 160 - partition; 200 - support base; 300 - lifting member; 400 - guide roller. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. The components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in a variety of different configurations.
[0031] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.
[0032] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.
[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.
[0034] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0035] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0036] During the battery manufacturing process, it is necessary to involve the functions of heating and heat preservation of materials so that the positive electrode sheet, negative electrode sheet, and separator are heated and rolled by a heating roller to form a composite sheet. Currently, an oven is usually used for heating.
[0037] Some existing ovens use the method of integrally casting heating tubes to form a heating aluminum plate, and some use heating tubes as heat sources to heat the aluminum plate. The principle is to make current pass through the heating tubes so that the heating tubes generate heat and transfer the heat to the surface of the heating plate through heat conduction. However, this heating method makes the temperature uniformity on the surface of the heating plate easily affected by the power of the heating tubes themselves and the layout method, resulting in limited temperature uniformity and thermal efficiency of the oven heating plate surface and reducing the heating effect.
[0038] Based on the above problems, the embodiment of the present utility model provides a composite device, which is applied to the field of battery manufacturing technology and is used to form a composite sheet from a positive electrode sheet, a negative electrode sheet, and a separator. The composite sheets can be stacked into a battery cell through a stacking table.
[0039] Please refer to Figure 1 , the composite device 1 includes a negative electrode tape 11, a first positive electrode tape 12, a second positive electrode tape 13, and an electromagnetic heating device 10. The number of electromagnetic heating devices 10 is three, and the three electromagnetic heating devices 10 are respectively arranged on the negative electrode tape 11, the first positive electrode tape 12, and the second positive electrode tape 13.
[0040] Among them, the electromagnetic heating device 10 uses the principle of electromagnetic heating to heat the electrode sheet or the separator, which can make the heating temperature more uniform, thereby increasing the viscosity between the separator and the electrode sheet, and thus improving the heating effect.
[0041] In this embodiment, the composite device 1 usually further includes a negative rolling roller 14 and a positive rolling roller 15. Among them, the negative rolling roller 14 is used to convey the negative electrode tape 11. The negative electrode tape 11 includes a negative electrode sheet and a separator. By arranging the electromagnetic heating device 10 on the negative electrode tape 11, the negative electrode sheet conveyed by the negative rolling roller 14 is bonded to the separator to form a composite tape, and it is heated to a certain temperature to increase the viscosity of the PVDF on the surface of the separator, thereby enhancing the adhesion effect. The other two electromagnetic heating devices 10 are respectively arranged on the first positive electrode tape 12 and the second positive electrode tape 13 to heat the positive electrode sheets of the two positive electrode tapes respectively. The positive rolling roller 15 is used to roll the composite tape formed by the negative electrode sheet and the separator and the positive electrode sheets on both sides of the composite tape to form a composite sheet composed of a positive electrode sheet, a negative electrode sheet, and a separator for stacking the battery cell under preset pressure and temperature conditions.
[0042] Furthermore, the composite device 1 further includes a first cutter 16 and a second cutter 17. The first cutter 16 is arranged on the first positive electrode tape 12, and the second cutter 17 is arranged on the second positive electrode tape 13.
[0043] In this embodiment, both the first cutting knife 16 and the second cutting knife 17 are located behind the corresponding electromagnetic heating device 10. That is, the positive electrode sheet is first heated by the electromagnetic heating device 10 before entering the cutting knife, and then the cutting knife is used to cut the positive electrode sheet. At this time, the composite strip after the negative electrode sheet and the separator are compounded and the positive electrode sheet cut by the first cutting knife 16 and the second cutting knife 17 are alternately fed into the positive rolling roller 15 for rolling and compounding.
[0044] Further, please continue to refer to Figure 2 , the electromagnetic heating device 10 includes a support seat 200, a lifting member 300 and a heating plate 100. The number of heating plates 100 is two, and the two heating plates 100 are arranged in parallel on the support seat 200. The lifting member 300 is arranged on the support seat 200, and the lifting member 300 is connected to one of the heating plates 100 for driving one of the heating plates 100 to lift relative to the other heating plate 100.
[0045] In this embodiment, the lifting member 300 drives the heating plate 100 to lift, that is, the electromagnetic heating device 10 adopts an up-and-down opening and closing method, which is convenient for the electromagnetic heating device 10 to automatically open even in the shutdown state and has a safety protection function. In addition, the up-and-down opening and closing structure can reduce the large holes cut on the heating plate 100 to meet the front-and-back opening and closing of the oven, so as to reduce the space occupied by the components, enhance the structural strength of the heating plate, and improve the space utilization rate.
[0046] The lifting member 300 can be a lifting cylinder. Of course, the lifting member 300 can also be other devices, as long as it can drive the heating plate 100 to lift, and no specific limitation is made here.
[0047] Further, the electromagnetic heating device 10 includes a guide roller 400. The guide roller 400 is arranged on the support seat 200, and the guide roller 400 is used for conveying the electrode sheet.
[0048] In this embodiment, the electrode sheet is conveyed to the heating plate 100 through the guide roller 400 to realize the heating of the electrode sheet by the heating plate 100.
[0049] Further, please continue to refer to Figure 3 , the heating plate 100 includes a heating element 110, an electromagnetic coil 120, a sensor 130 and a controller 140.
[0050] Among them, the heating element 110 is provided with a first mounting hole 111 and a second mounting hole 112; the electromagnetic coil 120 is arranged in the first mounting hole 111; the sensor 130 is arranged in the second mounting hole 112; the controller 140 is connected to both the electromagnetic coil 120 and the sensor 130 at the same time.
[0051] In this embodiment, the controller 140 supplies power to the electromagnetic coil 120 to generate a magnetic field. When the magnetic field lines of the generated magnetic field pass through the surface of the heating element 110, an eddy current effect will be generated inside the surface of the heating element 110. Due to the inherent resistance of the heating element 110, a large amount of heat energy will be generated, enabling the surface of the heating element 110 to heat up rapidly by itself, and the heating is more uniform compared with the existing heating methods such as heating rods. Moreover, by arranging the sensor 130 in the second mounting hole 112 of the heating element 110 to detect the temperature of the heating element 110 in real time, the controller 140 receives the temperature obtained by the sensor 130 and adjusts the current input to the electromagnetic coil 120 based on this temperature, thereby achieving precise control of the surface temperature of the heating element 110 and effectively improving the heating efficiency and heating quality.
[0052] Optionally, the controller 140 can supply a high-frequency current of 20KHz to 60Khz to the electromagnetic coil 120, so that the magnetic field in the electromagnetic coil 120 changes violently. Through electromagnetic heating, the temperature deviation on the surface of the heating element can be controlled within the range from room temperature to 150°C, and the temperature deviation is controlled within ±3°C, and the heating time < 15 min (the time to heat to 80°C < 5 min).
[0053] Furthermore, the number of the first mounting holes 111 and the electromagnetic coils 120 is multiple, and the multiple electromagnetic coils 120 are respectively arranged in the multiple first mounting holes 111 in a one-to-one correspondence.
[0054] In this embodiment, by providing multiple first mounting holes 111 in the heating element 110, the multiple electromagnetic coils 120 are respectively installed in the multiple first mounting holes 111, thereby further improving the heating efficiency of the heating plate 100.
[0055] It can be understood that the multiple first mounting holes 111 are arranged at equal intervals along the heating element 110 to make the heating temperature more uniform.
[0056] Furthermore, the number of the second mounting holes 112 and the sensors 130 is multiple, and the multiple sensors 130 are respectively arranged in the multiple second mounting holes 112 in a one-to-one correspondence.
[0057] In this embodiment, by providing multiple second mounting holes 112 in the heating element 110, the multiple sensors 130 are respectively installed in the multiple second mounting holes 112, thereby improving the accuracy of detecting the temperature of the heating element 110.
[0058] Specifically, the number of the second mounting holes 112 and the sensors 130 is two. The two second mounting holes 112 are respectively located on both sides of the first mounting hole 111, and the two sensors 130 are respectively arranged in the two second mounting holes 112.
[0059] In this embodiment, by arranging two second mounting holes 112 on both sides of one or more first mounting holes 111, the temperature of the heating element 110 is detected by two sensors 130 respectively, thereby improving the accuracy of the detected temperature.
[0060] Further, the heating plate 100 further includes a support shaft 150. The support shaft 150 is arranged in the first mounting hole 111, and the electromagnetic coil 120 is sleeved outside the support shaft 150.
[0061] In this embodiment, by arranging the support shaft 150 in the first mounting hole 111 and winding the electromagnetic coil 120 outside the support shaft 150, the mounting stability of the electromagnetic coil 120 is improved.
[0062] Further, the heating plate 100 further includes a partition 160. The partition 160 is arranged on both sides of the heating element 110.
[0063] In this embodiment, by arranging the partition 160 on both sides of the heating element 110, the loss of temperature is reduced, thereby improving the heating efficiency of the heating element 110.
[0064] Further, as Figure 3 shown, the first mounting hole 111 is linear, so that the electromagnetic coil 120 is arranged in a straight line along the first mounting hole.
[0065] In other embodiments, the first mounting hole 111 can also have other structures. For example, as Figure 4 shown, the first mounting hole 111 is a spiral polygon, such as a spiral rectangle, so that the electromagnetic coil 120 is arranged in a spiral polygon along the first mounting hole 111, such as a spiral rectangle.
[0066] As Figure 5 shown, the first mounting hole 111 can also be a spiral circle, so that the electromagnetic coil 120 is arranged in a spiral circle along the first mounting hole 111.
[0067] In summary, the present utility model provides a heating plate 100, an electromagnetic heating device 10 and a composite device 1. By energizing the electromagnetic coil 120 through the controller 140 to generate a magnetic field, when the magnetic force lines of the generated magnetic field pass through the surface of the heating element 110, an eddy current effect will be generated inside the surface of the heating element 110. Due to the inherent resistance of the heating element 110, a large amount of heat energy will be generated, which can make the surface of the heating element 110 itself heat up quickly, and the heating is more uniform compared with the existing heating methods such as heating rods; moreover, by arranging the sensor 130 in the second mounting hole 112 of the heating element 110 to detect the temperature of the heating element 110 in real time, the controller 140 receives the temperature obtained by the sensor 130 and adjusts the current input to the electromagnetic coil 120 through this temperature, so as to accurately control the surface temperature of the heating element 110 and effectively improve the heating efficiency and heating quality.
[0068] The foregoing is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.
Claims
1. A heating plate, characterized in that: include: A heating element, wherein the heating element is provided with a first mounting hole and a second mounting hole; An electromagnetic coil, wherein the electromagnetic coil is arranged in the first mounting hole; A sensor, wherein the sensor is disposed in the second mounting hole; A controller is connected to the electromagnetic coil and the sensor at the same time.
2. The heating plate according to claim 1, characterized in that There are multiple first mounting holes and multiple electromagnetic coils, and the multiple electromagnetic coils are disposed in the multiple first mounting holes in a one-to-one correspondence.
3. The heating plate according to claim 1, characterized in that The number of the second mounting holes and the number of the sensors are both multiple, and the multiple sensors are arranged in the multiple second mounting holes in a one-to-one correspondence.
4. The heating plate according to claim 3, characterized in that The number of the second mounting holes and the number of the sensors are both two, the two second mounting holes are respectively located on both sides of the first mounting hole, and the two sensors are respectively arranged in the two second mounting holes.
5. The heating plate according to claim 1, characterized in that The heating plate further comprises a supporting shaft, the supporting shaft is arranged in the first mounting hole, and the electromagnetic coil is sleeved outside the supporting shaft.
6. The heating plate according to claim 1, characterized in that The heating plate further comprises a partition plate, and the partition plate is arranged on both sides of the heating element.
7. The heating plate according to claim 1, characterized in that The first mounting hole is in a straight line, so that the electromagnetic coil is arranged in a straight line along the first mounting hole; Or, the first mounting hole is in a spiral polygonal shape, so that the electromagnetic coil is arranged in a spiral polygonal shape along the first mounting hole; Alternatively, the first mounting hole is in a spiral circular shape, so that the electromagnetic coil is arranged in a spiral circular shape along the first mounting hole.
8. An electromagnetic heating device, characterized in that: It includes a support seat, a lifting member, a roller and two heating plates as described in any one of claims 1 to 7, the two heating plates are arranged in parallel on the support seat, the lifting member is arranged on the support seat, and the lifting member is connected to one of the heating plates for driving one of the heating plates to rise and fall relative to the other heating plate; the roller is arranged on the support seat, and the roller is used to transport the electrode.
9. A composite device, characterized in that: It includes a negative electrode material strip, a first positive electrode material strip, a second positive electrode material strip and the electromagnetic heating device as described in claim 8, wherein the number of the electromagnetic heating devices is three, and the three electromagnetic heating devices are respectively arranged on the negative electrode material strip, the first positive electrode material strip and the second positive electrode material strip.
10. The composite device according to claim 9, characterized in that The composite device also includes a first cutter and a second cutter, wherein the first cutter is arranged on the first positive electrode material strip, and the second cutter is arranged on the second positive electrode material strip.