Battery cell hot-pressing device

Abstract

This application relates to a battery cell hot-pressing device, which includes multiple hot-pressing stations and a pressure actuator. Each hot-pressing station is equipped with a first electromagnetic heating component and a second electromagnetic heating component arranged opposite to each other, forming a battery cell hot-pressing space between the first and second electromagnetic heating components. The first and second electromagnetic heating components are used to generate a magnetic field to heat the battery cell. The pressure actuator is used to apply pressure to the heated battery cell. The solution provided by this application can improve energy utilization efficiency and heating speed, and significantly shorten the battery cell hot-pressing time.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing equipment technology, and in particular to a cell hot pressing device. Background Technology

[0002] With the increasing popularity of clean energy devices such as new energy vehicles, the demand for lithium batteries continues to grow. In the lithium battery production process, after the cells are cut, stacked, or wound, they need to undergo a hot-pressing shaping process to ensure structural stability for subsequent operations.

[0003] In related technologies, a resistance heating rod is generally used to heat a metal pressure plate, and then the pressure plate conducts the heat to the battery cell. However, this solution has significant drawbacks: heat needs to be transferred through multiple stages, including the resistance rod, the pressure plate, and the battery cell, resulting in a large amount of energy loss in the conversion process, leading to low heating efficiency and a long single hot pressing time. Utility Model Content

[0004] To solve or partially solve the problems existing in the related technologies, this application provides a battery cell hot pressing device, which can improve energy utilization efficiency and heating speed, and significantly shorten the hot pressing time of the battery cell.

[0005] This application provides a battery cell hot pressing device, comprising: The heating station is provided with a first electromagnetic heating component and a second electromagnetic heating component arranged opposite to each other, forming a cell heating space between the first electromagnetic heating component and the second electromagnetic heating component, and the first electromagnetic heating component and the second electromagnetic heating component are used to generate a magnetic field to heat the cell. A pressure actuator is used to drive the first electromagnetic heating component and the second electromagnetic heating component to move relative to each other, so as to apply pressure to the battery cell in the battery cell heating space.

[0006] In one embodiment, the battery cell hot pressing device includes: Multiple layers of pressure plates are arranged at intervals; wherein, the first electromagnetic heating component and the second electromagnetic heating component are respectively integrated on opposite sides of adjacent pressure plates; At least a portion of the pressure plate includes an electromagnetic coil integration section and a battery cell support section, the electromagnetic coil integration section and the battery cell support section being fixed to opposite sides of the pressure plate, the electromagnetic coil integration section being used to mount an electromagnetic induction coil; the battery cell support section being used to place a battery cell, and the battery cell support section being mounted with the second electromagnetic heating assembly.

[0007] In one embodiment, the battery cell hot pressing device includes: The pressure actuator includes a lifting mechanism and a pressure actuator. The lifting mechanism is connected to each layer of the pressure plates, and the pressure actuator is connected to at least one of the pressure plates, for transmitting pressure between the multiple layers of pressure plates.

[0008] In one embodiment, the battery cell hot pressing device includes: A cell lifting assembly, comprising a cell lifting component and a lifting driver; The cell lifting component is located adjacent to the cell support portion and is used to support and lift the cell. The lifting driver is connected to the cell lifting component and is used to drive the cell lifting component to move up and down, so that the cell descends or rises relative to the cell support portion.

[0009] In one embodiment, the cell lifting member is a flexible membrane material, and the cell lifting assembly includes a tensioning mechanism connecting both ends of the flexible membrane material; The tensioning mechanism includes a drive unit corresponding to the end of the flexible membrane material. The power output end of the drive unit is connected to the end of the flexible membrane material. By synchronously operating, the flatness of the flexible membrane material is controlled to raise or lower the battery cell.

[0010] In one embodiment, the cell hot-pressing device further includes: The controller and a pressure sensor electrically connected to the controller are provided. The pressure sensor is installed on the pressure transmission path of the pressure plate and is used to detect the pressure value between the first electromagnetic heating component and the second electromagnetic heating component. The controller is configured to receive the real-time pressure signal from the pressure sensor, and when the pressure value reaches a preset threshold, trigger the first electromagnetic heating component and the second electromagnetic heating component to start heating. When the cell temperature reaches a set value, control the pressure actuator to reset.

[0011] In one embodiment, the controller is also electrically connected to the tensioning mechanism, and the controller is configured to control the tensioning mechanism to relax the flexible membrane material before the hot pressing begins, so that the battery cell falls onto the battery cell support portion; After hot pressing is completed, the tensioning mechanism is controlled to tension the flexible membrane material, so that the battery cell is detached from the battery cell support part.

[0012] In one embodiment, both the first electromagnetic heating assembly and the second electromagnetic heating assembly include electromagnetic coils wound with wires, and each layer of electromagnetic coils is electrically connected to the controller. The cell-bearing portion of the pressure plate is equipped with an electromagnetic coil.

[0013] In one embodiment, the battery cell hot pressing device further includes a dust removal mechanism, which includes a negative pressure suction nozzle located at the heating station. The negative pressure suction nozzle is arranged along the side of the battery cell and faces the battery cell support portion.

[0014] In one embodiment, the battery cell hot pressing device includes: The frame includes a column, on which a guide rail is fixedly mounted. The pressure plate is movably mounted on the guide rail via a sliding assembly, and the pressure actuator is mounted on the frame.

[0015] The technical solution provided in this application may include the following beneficial effects: The solution provided in this application includes a heating station with a first electromagnetic heating component and a second electromagnetic heating component arranged opposite to each other, forming a cell heating space between them. The first and second electromagnetic heating components generate a magnetic field to heat the cell. Employing the principle of electromagnetic induction heating, the magnetic field directly acts on the internal electrodes of the cell, causing them to heat up. This avoids the intermediate step of heating the pressing plate with a traditional resistance rod, improving energy utilization efficiency and heating speed, and significantly shortening the hot-pressing time.

[0016] Furthermore, the solution of this application includes a controller and a pressure sensor electrically connected to the controller. The pressure sensor is used to detect the pressure value between the first electromagnetic heating component and the second electromagnetic heating component. Thus, the combination of the pressure sensor and the controller achieves precise control of the linkage between pressure and heating. Heating is only initiated when the pressure reaches the set value, ensuring that the hot pressing process is carried out under effective pressure. Automatic reset occurs after the temperature reaches the target, ensuring the consistency of the hot pressing process and improving the automation level and reliability of the hot pressing operation.

[0017] Furthermore, the solution of this application integrates the electromagnetic coil directly into the cell-bearing part of the pressure plate, ensuring precise alignment and area coverage. This allows the generated magnetic field to act efficiently and uniformly over the entire effective area of ​​the cell, eliminating heating dead zones and significantly improving heating uniformity. The close arrangement of the electromagnetic coil and the cell, such as directly supporting the cell, maximizes the magnetic field utilization efficiency, shortens the hot-pressing time, and ensures the accuracy and controllability of the heating process.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0019] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0020] Figure 1 This is a schematic diagram of the overall structure of the battery cell hot pressing device shown in the embodiments of this application; Figure 2 This is a schematic diagram of the installation of the upper electromagnetic heating component of the battery cell hot pressing device shown in the embodiments of this application; Figure 3 This is a schematic diagram of the installation of the lower electromagnetic heating component of the battery cell hot pressing device shown in the embodiments of this application.

[0021] Figure label: 100. Battery cell hot pressing device; 101. Frame; 102. Mounting plate; 103. Battery cell heating space; 110. Lifting mechanism; 111. Pressure actuator; 120. Pressure plate; 121. First electromagnetic heating assembly; 122. Second electromagnetic heating assembly; 1221. Battery cell support part; 130. Battery cell lifting assembly; 131. Lifting component; 140. Dust removal mechanism; 141. Negative pressure suction nozzle. Detailed Implementation

[0022] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0023] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0024] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0025] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0026] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] In related technologies, a resistance heating rod is generally used to heat a metal pressure plate, which then conducts the heat to the battery cell. However, this method has significant drawbacks: heat must be transferred through multiple stages—the resistance rod, the pressure plate, and the battery cell—resulting in substantial energy loss during the conversion process, leading to low heating efficiency and a long single hot-pressing time. To address these issues, this application provides a battery cell hot-pressing device that can improve energy utilization efficiency and heating speed, significantly shortening the battery cell hot-pressing time.

[0028] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0029] Please see also Figures 1-3 This application provides a battery cell hot pressing device 100, which includes a heating station and a pressure actuator; the heating station is provided with a first electromagnetic heating component 121 disposed opposite to it. Figure 2 (shown) and the second electromagnetic heating assembly 122 ( Figure 2 (As shown), a cell heating space 103 is formed between the first electromagnetic heating component 121 and the second electromagnetic heating component 122. The first electromagnetic heating component 121 and the second electromagnetic heating component 122 are used to generate a magnetic field to heat the cell; the pressure actuator is used to apply pressure to the heated cell.

[0030] In this embodiment, the heating station and the pressure actuator are integrated, for example, they can be installed on the same frame. After the battery cell is heated, there is no need to transfer the battery cell. The pressure actuator directly applies pressure to the heated battery cell to shape it, which can improve the efficiency of the hot pressing operation of the battery cell.

[0031] It is worth noting that this application does not limit the cooperation method between the heating station and the pressure actuator. In other embodiments, the heating station and the pressure actuator can be set separately, for example, independently set in two different racks. After the battery cell is heated, the battery cell is transferred to the pressure actuator to apply pressure for shaping.

[0032] The following technical solutions of this application are described using the heating station and pressure actuator as an example.

[0033] In this embodiment, when the heating station and the pressure actuator are integrated, the pressure actuator is used to drive the first electromagnetic heating component 121 and the second electromagnetic heating component 122 to move relative to each other in order to apply pressure to the battery cell in the battery cell heating space 103.

[0034] In some embodiments, the heating station has multiple layers, such as two, three or more layers, and the pressure actuator is used to drive the first electromagnetic heating component and the second electromagnetic heating component of each heating station to move relative to each other, such as moving away from each other or moving closer to each other.

[0035] In this embodiment, a set of opposing first electromagnetic heating components 121 and second electromagnetic heating components 122 are installed at each heating station. The space formed between the first electromagnetic heating components 121 and the second electromagnetic heating components 122 is the cell heating space 103. When the first electromagnetic heating components 121 and the second electromagnetic heating components 122 are working, they generate a magnetic field in the heating space between them. This magnetic field acts on the cell (not shown) placed in this space, causing the electrode material inside the cell to heat up. At the same time, the pressure actuator connects to and drives the first electromagnetic heating components 121 and the second electromagnetic heating components 122 (or their supporting structure, such as the pressure plate 120) at each station, enabling them to move relative to each other, thereby applying the required clamping force to the cell placed in the heating space.

[0036] The solution proposed in this application adopts the principle of electromagnetic induction heating, in which the magnetic field directly acts on the electrode plates inside the battery cell to make them heat up, avoiding the intermediate step of heating the pressure plate 120 with a traditional resistance rod, thereby improving energy utilization efficiency and heating speed, and significantly shortening the hot pressing time.

[0037] In some embodiments, the battery cell hot pressing device includes multiple layers of pressure plates arranged at intervals in sequence; wherein, a first electromagnetic heating component and a second electromagnetic heating component are integrated on opposite sides of adjacent pressure plates; at least a portion of the pressure plates includes an electromagnetic coil integration portion and a battery cell support portion, the electromagnetic coil integration portion and the battery cell support portion being fixed to opposite sides of the pressure plates respectively, the electromagnetic coil integration portion being used to mount an electromagnetic induction coil; the battery cell support portion being used to place the battery cell, and the battery cell support portion being mounted with a second electromagnetic heating component.

[0038] In some embodiments, the first electromagnetic heating component and the second electromagnetic heating component may be disposed opposite to or disposed on the battery cell support portion. For example, the first electromagnetic heating component and the second electromagnetic heating component can directly heat the battery cell at the corresponding position, thereby improving the heating efficiency.

[0039] It is worth noting that this application does not limit the mounting position of the first and second electromagnetic heating components on the pressure plate. In other embodiments, the first and second electromagnetic heating components may be arranged opposite to the battery cell support portion, and the first and second electromagnetic heating components first heat the pressure plate, and then transfer heat through the pressure plate to heat the battery cell. (Continue to see...) Figure 1 and Figure 2 In some specific embodiments, the heating station is provided with three layers. The battery cell hot pressing device 100 includes at least three parallel pressure plates 120, which are pressure plate 120a, pressure plate 120b, and pressure plate 120c from top to bottom. Battery cell heating spaces 103a, 103b, and 103c are formed between adjacent pressure plates 120 from top to bottom. In this application, each heating space 103 can hold two battery cells.

[0040] In this embodiment, the upper surface of the bottom pressure plate 120c is integrated with a first electromagnetic heating component 121, and the lower surface of the top pressure plate 120a is integrated with a second electromagnetic heating component 122. The pressure plate 120b between the bottom and top layers includes an electromagnetic coil integration part and a cell support part 1221. The electromagnetic coil integration part is fixed to the lower surface of the pressure plate 120b and is used to install the first electromagnetic heating component 121 of the lower layer. The cell support part 1221 is disposed on the upper surface of the pressure plate 120 and is used to place the current layer cell. The cell support part 1221 is equipped with the second electromagnetic heating component 122 of the current layer.

[0041] It should be noted that the heating station and pressure plate 120 in this application are not limited to three layers. The three layers are only for ease of description. In other embodiments, more than three layers can be provided, such as four layers, five layers, six layers, etc.

[0042] In this embodiment, the bottommost pressure plate 120c, also known as the support plate, is fixed below the frame 101. A second electromagnetic heating assembly 122 is fixedly integrated on the upper surface of the pressure plate 120c. The topmost pressure plate 120 is connected to the pressure actuator, and a first electromagnetic heating assembly 121 is fixedly integrated on its lower surface. For the intermediate lamination plate 120b located between the bottom and top layers, an electromagnetic coil integration part is fixed on its lower surface. This integration part is used to install the first electromagnetic heating assembly 121 that provides heating to the lower workstation (i.e., the adjacent pressure plate 120c below). In other words, the coil on the lower surface of the intermediate lamination plate 120b is the first electromagnetic heating assembly 121 of the lower workstation. At the same time, the upper surface of the intermediate lamination plate 120b is provided with at least two cell support parts 1221 for directly placing the cells of the current workstation.

[0043] This application utilizes a multi-layer pressure plate structure design, where each pressure plate not only supports the battery cell and provides a mounting surface for the heating coil, but also provides a heating source for the lower workstation. This achieves a compact three-dimensional layout, allowing multiple battery cells to be hot-pressed simultaneously in a single operation. This improves production efficiency per unit time while reducing equipment size and cost.

[0044] In some embodiments, the pressure actuator includes a lifting mechanism 110 and a pressure actuator 111. The lifting mechanism connects to each layer of pressure plates, and the pressure actuator connects to at least one of the pressure plates, for transmitting pressure between the multiple layers of pressure plates. Specifically, the lifting mechanism 110 connects to each layer of pressure plates 120 except the bottom layer, and the pressure actuator connects to the top layer pressure plate 120a, for transmitting pressure downwards from the top layer pressure plate 120a. The bottommost pressure plate 120c and its integrated second electromagnetic heating assembly 122 are fixedly mounted on the device base and cannot be moved. The lifting mechanism 110 (e.g., a cylinder) is connected to the intermediate layer pressure plates 120b and the top layer pressure plate 120a (excluding the bottom layer), driving the intermediate and top layer pressure plates 120 to perform vertical lifting movements. The pressure actuator 111 (e.g., an electric cylinder or a booster cylinder) is connected to the topmost pressure plate 120a, and its function is to provide the main clamping force, driving the first electromagnetic heating assembly 121 of the top layer to press down, transmitting the clamping force layer by layer downwards to the cells at each workstation.

[0045] This application adopts a layered drive pressure actuator design. The bottom fixed pressure plate provides a reference, the lifting mechanism adjusts the height position of the pressure plates above the bottom, and the pressure actuator at the top provides the final clamping force, ensuring that all multi-layer cells can obtain uniform and controllable pressure, and the structure is stable and reliable.

[0046] In some embodiments, the cell hot pressing device 100 includes a cell lifting assembly 130, which includes a cell lifting member 131 and a lifting driver (not shown). The cell lifting member 131 is disposed adjacent to the cell support portion, for example, above the cell support portion 1221, and is used to support and lift the cell. The lifting driver is connected to the cell lifting member 131 and is used to drive the cell lifting member 131 to move up and down, so that the cell descends or rises relative to the cell support portion 1221.

[0047] In this embodiment, a cell lifting assembly 130 is provided above the cell support portion 1221 of each heating station. The lifting driver can be a cylinder, and the lifting driver is connected to the cell lifting member 131 through a transmission mechanism (such as a guide rail assembly) to drive the lifting member 131 to perform lifting and lowering movements, thereby lifting or lowering the cell placed on the lifting member 131 relative to the cell support portion 1221 below.

[0048] The cell lifting assembly 130 in this embodiment facilitates automated loading and unloading operations. During unloading, the lifting member 131 rises to facilitate the robot arm placing the cell in the heating space; after unloading, the lifting member 131 lowers to place the cell on the support; after hot pressing is completed, the lifting member 131 rises again to facilitate the robot arm removing the hot-pressed cell from the heating space, thereby improving the degree of automation and production cycle.

[0049] In some embodiments, the cell lifting member 131 is a flexible membrane material, and the cell lifting assembly 130 includes a tensioning mechanism (not shown) connecting the two ends of the flexible membrane material. The tensioning mechanism includes a driving member corresponding to the end of the flexible membrane material, and the power output end of the driving member is connected to the end of the flexible membrane material. Specifically, the tensioning mechanism includes two driving members respectively corresponding to the two ends of the flexible membrane material, and the power output end of each driving member is connected to the end of the flexible membrane material. The flatness of the flexible membrane material is controlled by synchronous operation to lift or lower the cell.

[0050] In some embodiments, the tensioning mechanism in the cell lifting assembly 130 is connected to both ends of the flexible membrane material. The tensioning mechanism includes two independent driving components, which can be cylinders. The power output end (e.g., a piston rod) of each driving component is directly or indirectly connected to the corresponding end of the fixed flexible membrane material. The two driving components are controlled synchronously by a controller to adjust the tension state of the flexible membrane material, such as relaxing or tightening, thereby controlling the flatness of the flexible membrane material and achieving smooth lifting or lowering of the cell. In this embodiment, a flexible anti-stick membrane material is used as the lifting component 131, and its state is controlled by the tensioning mechanism at both ends, effectively preventing the cell from sticking to the support and ensuring the integrity of the cell during placement and removal. Synchronous control ensures the flatness of the membrane material and smooth lifting and lowering of the cell.

[0051] In some embodiments, the battery cell hot pressing device 100 further includes a controller and a pressure sensor electrically connected to the controller. The pressure sensor is installed on the pressure transmission path of the pressure plate and is used to detect the pressure value between the first electromagnetic heating component 121 and the second electromagnetic heating component 122. The controller is configured to receive the real-time pressure signal from the pressure sensor. When the pressure value reaches a preset threshold, it triggers the first electromagnetic heating component 121 and the second electromagnetic heating component 122 to start heating. When the battery cell temperature reaches a set value, it controls the pressure actuator to reset.

[0052] The pressure sensor can be installed on the first electromagnetic heating assembly 121, the second electromagnetic heating assembly 122, or the pressure plate 120, but is not limited to these; it can also be installed at other locations where pressure can be detected. The pressure sensor is used to detect the pressure value applied to the battery cell in real time. The controller receives the real-time pressure signal from the pressure sensor; when the detected pressure value reaches a preset threshold, a trigger signal starts the first electromagnetic heating assembly 121 and the second electromagnetic heating assembly 122 to begin heating; during the heating process, the heating temperature is continuously monitored; when it is confirmed that the battery cell temperature has reached the set requirement value, the controller controls the lifting mechanism 110 and the pressure actuator to reset, release the pressure, and lift the upper heating assembly.

[0053] The proposed solution combines a pressure sensor with a controller to achieve precise, linked control of pressure and heating. Heating is only initiated when the pressure reaches the set value, ensuring the hot-pressing process is conducted under effective pressure. Automatic reset occurs once the temperature reaches the target, guaranteeing consistency in the hot-pressing process and cell quality, while simultaneously improving the automation level and reliability of the operation.

[0054] In some specific embodiments, both the first electromagnetic heating assembly 121 and the second electromagnetic heating assembly 122 include electromagnetic coils wound with wires, and each layer of electromagnetic coils is electrically connected to the controller; wherein, a lower electromagnetic coil is installed on the cell support portion 1221 of each layer of pressure plate 120; except for the bottom layer, an upper electromagnetic coil corresponding to the position of the cell support portion 1221 is installed on the lower surface of the adjacent upper layer pressure plate 120 above each layer of pressure plate 120.

[0055] In this embodiment, for each heating station, the lower electromagnetic coil is directly mounted on the upper surface of the cell support portion 1221 of the laminate 120 to support and heat the cell placed thereon. Except for the bottommost laminate 120, the lower surface of the adjacent upper laminate 120 above each laminate 120 integrates the upper electromagnetic coil for that station, and the position of this upper electromagnetic coil is aligned with the cell support portion 1221 on the corresponding lower laminate 120 directly below it. Furthermore, the coverage area of ​​the electromagnetic coil in each layer is larger than the projected area of ​​the cell to be processed within its corresponding heating space.

[0056] This application integrates electromagnetic coils directly into the cell-bearing portion 1221 of the pressure plate 120 and the lower surface of the upper pressure plate 120, ensuring precise alignment and area coverage. This allows the generated magnetic field to act efficiently and uniformly over the entire effective area of ​​the cell, eliminating heating dead zones and significantly improving heating uniformity. The close arrangement of the coils and the cell, such as the lower electromagnetic coil directly supporting the cell, maximizes magnetic field utilization efficiency and further shortens heating time. The unified connection of each layer's coils to the controller provides a structural basis for precise layered or overall independent control of heating parameters such as current and frequency, ensuring the accuracy and controllability of the heating process and ultimately optimizing hot pressing quality and efficiency.

[0057] In some embodiments, the controller is also electrically connected to the tensioning mechanism, which is configured to control the tensioning mechanism to relax the flexible membrane material before hot pressing begins, so that the battery cell falls onto the battery cell support portion 1221; and to control the tensioning mechanism to tension the flexible membrane material after hot pressing is completed, so that the battery cell detaches from the battery cell support portion 1221.

[0058] Before the hot pressing process begins, the controller controls the drive of the tensioning mechanism to relax the flexible membrane, allowing the battery cell placed on the membrane to naturally fall onto the battery cell support 1221 below. After the hot pressing process is completed and the pressure actuator is reset, the controller controls the drive of the tensioning mechanism to tighten the flexible membrane, causing the battery cell to be lifted, detached from the battery cell support 1221, and placed in a position that is easy to remove.

[0059] The controller of this application can coordinate the timing of the tensioning mechanism and the hot pressing process, automatically control the relaxation of the membrane material to achieve precise placement of the battery cell, and automatically control the tensioning of the membrane material to lift the battery cell after hot pressing, so that the loading and unloading actions are seamlessly connected with the hot pressing process, further improving the automation level and production efficiency of the equipment.

[0060] In some embodiments, the battery cell hot pressing device 100 further includes a dust removal mechanism 140, which includes a negative pressure suction nozzle 141 located at the heating station. The negative pressure suction nozzle 141 is arranged along the side of the battery cell (e.g., the long side and / or short side of the battery cell) and faces the battery cell support portion 1221. The negative pressure suction nozzle 141 is connected to external dust removal equipment, such as a central dust removal system or an independent dust collector, through a dust removal pipe. The dust removal equipment provides a negative pressure wind speed of 15-25 m / s to the negative pressure suction nozzle 141, utilizing the negative pressure suction force generated therefrom for dust removal. During the hot pressing process or after the battery cell is removed, the scattered dust, especially the dust remaining on the anti-stick diaphragm, is removed promptly and effectively, keeping the working area clean, preventing dust from contaminating the battery cell or affecting equipment operation, and improving product quality and the cleanliness of the production environment.

[0061] In some embodiments, the battery cell hot pressing device 100 includes a frame 101, which includes a column, which may be an upright column. A longitudinally arranged guide rail is fixedly mounted on the column. Each pressing plate 120 is movably mounted on the guide rail via a sliding assembly. A pressure actuator is fixedly mounted on a mounting plate 102 at the top of the frame 101. Specifically, the main support structure of the frame 101 is composed of an upright column. A longitudinally vertical guide rail is fixedly mounted on the upright column. Each pressing plate 120 in the multi-layer heating station is movably connected to the longitudinal guide rail on the upright column via a matching sliding assembly (such as a slider, sliding sleeve, etc.), allowing each pressing plate 120 to perform stable vertical lifting and lowering motion along the guide rail. An electric cylinder or booster cylinder used to provide the main clamping force is directly fixedly mounted on the rigid mounting plate 102 at the top of the frame 101, and its power output end is connected to the top pressing plate 120.

[0062] The frame 101 provides a stable overall support foundation, ensuring the rigidity and stability of the equipment operation. The longitudinal guide rails provide precise and reliable guidance for the lifting and lowering movement of the multi-layer pressure plates 120, ensuring the parallelism and accuracy of the movement trajectory of each pressure plate 120 during hot pressing, preventing pressure deviation or jamming. Directly fixing the pressure actuator to the mounting plate 102 at the top of the frame 101 not only simplifies the structural layout but also allows the clamping force to be transmitted directly and efficiently through the frame 101, avoiding pressure loss or fluctuations caused by suspended or unstable actuators, thus improving the accuracy of pressure control and the overall reliability of the device. This integrated mechanical architecture design is the key foundation for achieving efficient and stable multi-layer hot pressing.

[0063] The battery cell hot pressing device 100 provided in this application integrates electromagnetic coils directly onto the pressure plate 120 with precise alignment through a compact layout of multi-layer electromagnetic heating components. Combined with the rigid design of the layered pressure actuator and the guide rail of the frame 101, it achieves efficient and direct heating of the internal electrode sheets of the battery cell by the magnetic field, significantly shortening the hot pressing time and greatly improving energy utilization. Its multi-layer synchronous hot pressing capability, together with the battery cell lifting component 130 and the automated control system, effectively increases unit production capacity and reduces equipment space occupation. The precise linkage between pressure and heating ensures process consistency.

[0064] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A battery cell hot pressing device, characterized in that, include: The heating station is provided with a first electromagnetic heating component and a second electromagnetic heating component arranged opposite to each other, forming a cell heating space between the first electromagnetic heating component and the second electromagnetic heating component, and the first electromagnetic heating component and the second electromagnetic heating component are used to generate a magnetic field to heat the cell. A pressure actuator is used to apply pressure to the heated battery cell.

2. The cell hot pressing device according to claim 1, characterized in that, include: Multiple layers of pressure plates are arranged at intervals; wherein, the first electromagnetic heating component and the second electromagnetic heating component are respectively integrated on opposite sides of adjacent pressure plates; At least a portion of the pressure plate includes an electromagnetic coil integration section and a battery cell support section, the electromagnetic coil integration section and the battery cell support section being fixed to opposite sides of the pressure plate, the electromagnetic coil integration section being used to mount an electromagnetic induction coil; the battery cell support section being used to place a battery cell, and the battery cell support section being mounted with the second electromagnetic heating assembly.

3. The cell hot pressing device according to claim 2, characterized in that, include: The pressure actuator includes a lifting mechanism and a pressure actuator. The lifting mechanism is connected to each layer of the pressure plates, and the pressure actuator is connected to at least one of the pressure plates, for transmitting pressure between the multiple layers of pressure plates.

4. The cell hot pressing device according to claim 2, characterized in that, include: A cell lifting assembly, comprising a cell lifting component and a lifting driver; The cell lifting member is disposed adjacent to the cell carrying part and is used to carry and lift the cell. The lifting driver is connected to the cell lifting member and is used to drive the cell lifting member to move up and down so that the cell descends or rises relative to the cell carrying part.

5. The cell hot pressing device according to claim 4, characterized in that: The cell lifting component is a flexible membrane material, and the cell lifting assembly includes a tensioning mechanism connecting both ends of the flexible membrane material; The tensioning mechanism includes a drive unit corresponding to the end of the flexible membrane material. The power output end of the drive unit is connected to the end of the flexible membrane material. By synchronously operating, the flatness of the flexible membrane material is controlled to raise or lower the battery cell.

6. The cell hot pressing device according to claim 5, characterized in that, Also includes: The controller and a pressure sensor electrically connected to the controller are provided. The pressure sensor is installed on the pressure transmission path of the pressure plate and is used to detect the pressure value between the first electromagnetic heating component and the second electromagnetic heating component. The controller is configured to receive the real-time pressure signal from the pressure sensor, and when the pressure value reaches a preset threshold, trigger the first electromagnetic heating component and the second electromagnetic heating component to start heating. When the cell temperature reaches a set value, control the pressure actuator to reset.

7. The cell hot pressing device according to claim 6, characterized in that: The controller is also electrically connected to the tensioning mechanism, and the controller is configured to control the tensioning mechanism to relax the flexible membrane material before the hot pressing begins, so that the battery cell falls onto the battery cell support portion; After hot pressing is completed, the tensioning mechanism is controlled to tension the flexible membrane material, so that the battery cell is detached from the battery cell support part.

8. The cell hot pressing device according to claim 2, characterized in that: Both the first electromagnetic heating component and the second electromagnetic heating component include electromagnetic coils made of wires, and the electromagnetic coils of each layer are electrically connected to the controller. The electromagnetic coil is installed in the cell-bearing part of the pressure plate.

9. The cell hot pressing device according to claim 1, characterized in that: It also includes a dust removal mechanism, which includes a negative pressure suction nozzle located at the heating station. The negative pressure suction nozzle is arranged along the side of the battery cell and faces the battery cell support.

10. The cell hot pressing device according to claim 2, characterized in that, Also includes: The frame includes a column, on which a guide rail is fixedly mounted. The pressure plate is movably mounted on the guide rail via a sliding assembly, and the pressure actuator is mounted on the frame.

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