Battery heating device and coating machine

Abstract

This application discloses a battery heating device and a coating machine. The battery heating device includes a fixed frame, a first driving structure, a first heating structure, a second driving structure, and a second heating structure. The first driving structure is disposed on the fixed frame, and the first heating structure is connected to the first driving structure. The second driving structure is disposed on the fixed frame and is positioned opposite to the first driving structure. The second heating structure is connected to the second driving structure. The first driving structure drives the first heating structure to move relative to the fixed frame toward the second heating structure, and the second driving structure drives the second heating structure to move relative to the fixed frame toward the first heating structure, so that the first heating structure and the second heating structure clamp the battery and heat the battery. In this way, the heat and clamping force make the film and insulating sheet tightly adhere to the surface of the battery, preventing the film and insulating sheet from lifting and thus preventing the battery insulation protection from failing.

Description

Technical Field

[0001] This application relates to the field of new energy equipment, and in particular to a battery heating device and a coating machine. Background Technology

[0002] In the production process of power batteries and energy storage batteries, the reliability of the insulation protection of the cell's outer packaging directly determines the battery's safety performance throughout its lifespan. Generally, a blue protective film is used to cover the cell surface, along with an insulating sheet for insulation protection. However, in related technologies, after the film is applied by the coating machine, the edges of the blue film or insulating sheet are prone to lifting and falling off, leading to the failure of the battery's insulation protection. Utility Model Content

[0003] This application provides a battery heating device and a coating machine, which can prevent the battery's insulation protection from failing.

[0004] The battery heating device provided in this application includes:

[0005] Fixture;

[0006] A first driving structure is provided on the fixed frame;

[0007] A first heating structure is connected to the first driving structure;

[0008] A second drive structure is disposed on the fixed frame and is arranged opposite to the first drive structure; and

[0009] The second heating structure is connected to the second driving structure;

[0010] The first driving structure drives the first heating structure to move relative to the fixing frame toward the direction of the second heating structure, and the second driving structure drives the second heating structure to move relative to the fixing frame toward the direction of the first heating structure, so that the first heating structure and the second heating structure clamp the battery and heat the battery.

[0011] Optionally, the driving stroke of the first driving structure is equal to the distance between the initial position of the first heating structure and the battery, the driving stroke of the second driving structure is greater than the driving stroke of the first driving structure, and the output force of the second driving structure is greater than the output force of the first driving structure.

[0012] Optionally, the first driving structure includes a first driving cylinder and a first piston rod, the first driving cylinder being connected to the fixed frame, and the first piston rod being used to drive the first heating structure to move;

[0013] The second driving structure includes a second driving cylinder and a second piston rod. The second driving cylinder is connected to the fixed frame, and the second piston rod is used to drive the second heating structure to move. The cylinder diameter of the first driving cylinder is smaller than that of the second driving cylinder.

[0014] Optionally, the first driving structure drives the first heating structure to move along the height direction of the battery toward the direction closer to the second heating structure, and the second driving structure drives the second heating structure to move along the height direction of the battery toward the direction closer to the first heating structure.

[0015] Optionally, the first heating structure includes a first heating plate and a first movable plate connected to the first heating plate. The first heating plate is disposed toward the battery, and the first movable plate is movably connected to the first driving structure. The first movable plate is capable of moving relative to the first driving structure toward or away from the second driving structure.

[0016] Optionally, the first heating structure includes a first temperature sensor, the detection end of which is mounted on the outside of the first heating plate, and the first temperature sensor is used to detect the temperature outside the first heating plate.

[0017] Optionally, the first heating structure includes a second temperature sensor, the detection end of which is installed inside the first heating plate, and the second temperature sensor is used to detect the internal temperature of the first heating plate.

[0018] Optionally, the first heating structure includes a first back plate connected to the first driving structure. The first back plate is installed on the side of the first movable plate opposite to the first heating plate, and heat dissipation holes are provided on the first back plate.

[0019] Optionally, the first heating structure includes a first reinforcing plate, which is used to connect the first back plate and the first driving structure.

[0020] The coating machine provided in this application includes:

[0021] Platform;

[0022] The coating device is mounted on the platform; and

[0023] In any of the above embodiments of the battery heating device, the mounting frame of the battery heating device is connected to the platform.

[0024] In the battery heating device and coating machine of this application, the first drive structure and the second drive structure respectively drive the first heating structure and the second heating structure to move closer together. While clamping the battery, they simultaneously heat the battery. The heat and clamping force ensure that the film and insulating sheet are tightly adhered to the battery surface, preventing the film and insulating sheet from lifting and thus avoiding battery insulation protection failure. Furthermore, the two drive structures can independently adjust the moving distance of the two heating structures according to the size differences of batteries of different specifications, ensuring that the heating structures are both in contact with both sides of the battery. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the battery heating device provided in an embodiment of this application.

[0027] Figure 2 This is an exploded view of the battery heating device provided in an embodiment of this application.

[0028] Explanation of icon numbers:

[0029] Battery heating device 100, fixing frame 10, first column 11, second column 12;

[0030] First drive structure 20, first drive cylinder 21, first guide rail 22, first slider 23, first slide plate 24;

[0031] First heating structure 30, first heating plate 31, first heating tube 311, first movable plate 32, first temperature sensor 33, second temperature sensor 34, first back plate 35, heat dissipation hole 351, first reinforcing plate 36;

[0032] Second drive structure 40, second drive cylinder 41, second guide rail 42, second slide plate 44;

[0033] The system includes a second heating structure 50, a second heating plate 51, a second heating tube 511, a second movable plate 52, a third temperature sensor 53, and a second back plate 55.

[0034] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0036] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0037] 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. They 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. Therefore, they should not be construed as limitations on this application.

[0038] It should be understood that the term "and / or" as used in this application specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. 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.

[0040] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the battery heating device 100 provided in the embodiments of this application. Figure 2 This is an exploded view of the battery heating device 100 provided in an embodiment of this application. The battery heating device 100 provided in this embodiment includes a mounting frame 10, a first driving structure 20, a first heating structure 30, a second driving structure 40, and a second heating structure 50. The first driving structure 20 is disposed on the mounting frame 10, and the first heating structure 30 is connected to the first driving structure 20. The second driving structure 40 is disposed on the mounting frame 10 and is disposed opposite to the first driving structure 20. The second heating structure 50 is connected to the second driving structure 40.

[0041] The first driving structure 20 drives the first heating structure 30 to move relative to the fixed frame 10 toward the direction of the second heating structure 50, and the second driving structure 40 drives the second heating structure 50 to move relative to the fixed frame 10 toward the direction of the first heating structure 30, so that the first heating structure 30 and the second heating structure 50 clamp the battery 200 and heat the battery 200.

[0042] Specifically, the mounting bracket 10 serves as the installation base and support structure of the battery heating device 100, and is mainly used to support the first drive structure 20, the first heating structure 30, the second drive structure 40, and the second heating structure 50. The mounting bracket 10 can be made of rigid materials such as aluminum alloy profiles or cast iron parts to ensure that each component maintains a stable relative position during operation.

[0043] The fixing frame 10 may include a first column 11 and a second column 12 arranged at intervals. A first drive structure 20 is mounted on the first column 11, and a second drive structure 40 is mounted on the second column 12. The columns may be cylinders or prisms, etc., and there is no limitation.

[0044] The first drive structure 20 and the second drive structure 40 are disposed opposite to each other on the fixed frame 10. The specific types of the first drive structure 20 and the second drive structure 40 can be pneumatic drive components, electric drive components, or hydraulic drive components, etc., and are not limited here. The fixed end of the first drive structure 20 is mounted on the fixed frame 10, and the movable end of the first drive structure 20 is connected to the first heating structure 30. The fixed end of the second drive structure 40 is mounted on the fixed frame 10, and the movable end of the second drive structure 40 is connected to the second heating structure 50.

[0045] Two heating structures, driven by a driving structure, act directly on both ends of the battery 200, clamping and heating the battery 200 simultaneously. The heating structures typically include heating elements, such as heating rods, heating plates, or heating tubes. The surfaces of the heating structures that contact the battery 200 can be designed to fit the shape of the battery 200, increasing the contact area and ensuring uniform heating. In some embodiments, temperature sensors such as thermocouples can also be installed on the heating structures to monitor the heating temperature in real time, enabling control of the heating process in conjunction with a temperature control system.

[0046] During operation, once the battery 200 to be heated is conveyed to a preset position between the first heating structure 30 and the second heating structure 50, the first driving structure 20 and the second driving structure 40 respectively drive their corresponding heating structures to move closer to each other. Specifically, the first driving structure 20 can first move the first heating structure 30 to contact one side of the battery 200, achieving initial positioning of the battery 200 and preventing the battery 200 from shifting in subsequent actions. Subsequently, the second driving structure 40 drives the second heating structure 50 to move slowly and fine-tune its position until it accurately fits against the other side of the battery 200, so that the two heating structures clamp the battery 200 together. At this time, the two heating structures begin to work, transferring heat at a preset temperature to the edges of the membrane material at the top and bottom of the battery 200. After the membrane material softens due to heat, it tightly adheres to the surface of the battery 200 under clamping pressure. The heating structures can also heat the top surface of the battery 200, flattening the insulating sheet and preventing it from lifting and falling off. After the heat bonding process is completed, the two drive structures drive the heating structure to move in the opposite direction to reset, releasing the battery 200 to enter the next production stage.

[0047] In the battery heating device 100 and coating machine of this application, the first drive structure 20 and the second drive structure 40 respectively drive the first heating structure 30 and the second heating structure 50 to move closer together. While clamping the battery 200, they heat the battery 200. The heat and clamping force make the film and insulating sheet adhere tightly to the surface of the battery 200, preventing the film and insulating sheet from lifting and thus preventing the battery 200 from failing its insulation protection. In addition, the two drive structures can independently adjust the movement of the two heating structures according to the size differences of batteries 200 of different specifications, ensuring that both heating structures are in contact with both sides of the battery 200.

[0048] Meanwhile, the first drive structure 20 and the second drive structure 40 can independently adjust the clamping pressure of the heating structures on both sides according to the bonding requirements of different parts of the battery 200, further improving the reliability of the bonding effect. In addition, if one drive structure fails, the other drive structure can work with the battery 200 production line to complete temporary treatment.

[0049] Optionally, the driving stroke of the first driving structure 20 is equal to the distance between the initial position of the first heating structure 30 and the battery 200, the driving stroke of the second driving structure 40 is greater than the driving stroke of the first driving structure 20, and the output force of the second driving structure 40 is greater than the output force of the first driving structure 20.

[0050] The first drive structure 20 is used to achieve rapid positioning, and the second drive structure 40 is used for fine adjustment and to provide the main clamping force, ensuring the positioning reference of the battery 200, facilitating accurate positioning of the battery 200, improving the adaptability of the battery heating device 100 to the size deviation of the battery 200, avoiding damage to the battery 200 due to excessive force, and also ensuring the consistency of heating and bonding effect.

[0051] Specifically, the driving stroke of the driving structure refers to the maximum distance that the driving structure can move the corresponding heating structure. The driving stroke of the first driving structure 20 is equal to the distance from the initial position of the first heating structure 30 to the battery 200. That is, when the first driving structure 20 is activated, it can move the first heating structure 30 to contact the surface of the battery 200, achieving rapid initial positioning of the battery 200. This avoids impact caused by excessive stroke or positioning failure caused by insufficient stroke, ensuring the stability of the first heating structure 30 when in contact with the battery 200.

[0052] The driving stroke of the second driving structure 40 is greater than that of the first driving structure 20, which allows for fine-tuning space for subsequent clamping of the battery 200. During transport, the battery 200 may experience slight positional deviations, or there may be dimensional tolerances between different batches of batteries 200. After the first driving structure 20 completes its initial positioning, the second driving structure 40 can utilize its larger stroke margin to slowly adjust the moving distance of the second heating structure 50 according to the actual position of the battery 200, until the second heating structure 50 is in contact with the other side of the battery 200.

[0053] After the second driving structure 40 is finely adjusted to fit against the battery 200, it still needs to provide the main clamping force to ensure that both heating structures can fit tightly against the surface of the battery 200 during the heating process, avoiding uneven heating caused by gaps. Therefore, the output force of the second driving structure 40 needs to be greater than the output force of the first driving structure 20.

[0054] In some implementations, both the first drive structure 20 and the second drive structure 40 are driven by servo motors. The drive stroke of the first drive structure 20 and the drive stroke of the second drive structure 40 can be set by programming. The difference in output force can be achieved by differentiating the motor torque parameters.

[0055] Optionally, the first drive structure 20 includes a first drive cylinder 21 and a first piston rod (not shown). The first drive cylinder 21 is connected to the fixed frame 10, and the first piston rod is used to drive the first heating structure 30 to move.

[0056] The second drive structure 40 includes a second drive cylinder 41 and a second piston rod (not shown). The second drive cylinder 41 is connected to the fixed frame 10, and the second piston rod is used to drive the second heating structure 50 to move. The cylinder diameter of the first drive cylinder 21 is smaller than the cylinder diameter of the second drive cylinder 41.

[0057] The output force of the two drive structures can be differentiated by the difference in the diameter of the two cylinders, without the need for additional complex adjustment components. It also allows the two heating structures to be positioned before clamping, so as to ensure the positioning reference of the battery 200 and facilitate the accurate positioning of the battery 200.

[0058] Specifically, the first drive structure 20 adopts a combination of a first drive cylinder 21 and a first piston rod. The first drive cylinder 21 is fixedly installed on the fixed frame 10, and the cylinder body can be fastened to the fixed frame 10 by means of bolt connection, flange fixation, etc., to ensure that no displacement or shaking occurs during operation.

[0059] One end of the first piston rod extends into the first drive cylinder 21 and connects to the piston, while the other end connects to the first heating structure 30. This connection can be achieved through threaded connection, pin engagement, or snap-fit ​​fixing. When compressed air is introduced into the first drive cylinder 21, the piston, under the action of air pressure, drives the first piston rod to extend and retract axially, thereby driving the first heating structure 30 closer to or further away from the second heating structure 50.

[0060] Similarly, the second drive structure 40 includes a second drive cylinder 41 and a second piston rod. The second drive cylinder 41 is also mounted on the fixed frame 10 and is positioned opposite to the first drive cylinder 21. One end of the second piston rod is connected to the piston inside the second drive cylinder 41, and the other end is connected to the second heating structure 50. The movement of the second heating structure 50 is achieved through pneumatic control of the second drive cylinder 41, ultimately cooperating with the first heating structure 30 to complete the clamping and heating action of the battery 200.

[0061] It should be noted that cylinder bore refers to the inner diameter of the cylinder block, which determines the output force of the cylinder. Under the same air pressure conditions, the larger the cylinder bore, the larger the force-bearing area of ​​the piston, and the greater the thrust output of the cylinder.

[0062] Therefore, the diameter of the second driving cylinder 41 is larger than that of the first driving cylinder 21, allowing the second driving cylinder 41 to provide a greater output force than the first driving cylinder 21. The first driving cylinder 21 is mainly responsible for driving the first heating structure 30 to move quickly to contact the battery 200 to complete the initial positioning. The smaller cylinder diameter can generate a moderate thrust to ensure stable contact between the first heating structure 30 and the battery 200. The larger cylinder diameter allows the second driving cylinder 41 to provide the main clamping force after fine adjustment, ensuring that both heating structures can be tightly attached to the surface of the battery 200 during the heating process.

[0063] Optionally, the first drive structure 20 may further include a first guide rail 22, a first slider 23, and a first slide plate 24. The first drive cylinder 21 is connected to the fixed frame 10 by bolts, and the end of the first piston rod is fixedly connected to the first slide plate 24. The first guide rail 22 is mounted on the fixed frame 10 parallel to the extension and retraction direction of the first piston rod. One side of the first slider 23 is slidably engaged with the first guide rail 22, and the other side of the first slider 23 is fixedly connected to the first slide plate 24.

[0064] The first heating structure 30 is mounted on the first slide plate 24. When compressed air is introduced into the first drive cylinder 21, the first piston rod extends and retracts, causing the first slide plate 24 to move along the first guide rail 22, thereby driving the first heating structure 30 to move closer to or away from the battery 200.

[0065] Similarly, the second drive structure 40 may include a second guide rail 42, a second slider (not shown) and a second slide plate 44. The second drive cylinder 41 is fixed on the fixed frame 10 and is arranged opposite to the first drive cylinder 21. The drive logic of the second drive structure 40 is the same as that of the first drive structure 20. The second heating structure 50 is moved by the cooperation of the second guide rail 42 and the second slider.

[0066] Optionally, the first driving structure 20 drives the first heating structure 30 to move along the height direction of the battery 200 toward the direction closer to the second heating structure 50, and the second driving structure 40 drives the second heating structure 50 to move along the height direction of the battery 200 toward the direction closer to the first heating structure 30.

[0067] In the production process of power batteries and energy storage batteries, the reliability of the insulation protection of the cell's outer packaging directly determines the battery's safety performance throughout its lifespan. Typically, a blue protective film is used to cover the cell surface, along with insulating sheets to achieve insulation protection.

[0068] During the application of the blue film to battery 200, the film first completely wraps around the sides of battery 200. Because the sides of battery 200 are continuously covered and the stress is evenly distributed, the risk of side lifting is low. After the sides are covered with the blue film, the excess portion is folded towards the top and bottom of battery 200 to form folded edges. These two folded edges, due to folding stress and a small contact area with the surface of battery 200, become high-risk areas for lifting. The insulating sheet is mainly attached to the top of battery 200. The edge of the insulating sheet overlaps with the folded edge of the top blue film; this double edge overlap makes lifting even more likely.

[0069] The first heating structure 30 and the second heating structure 50 move toward each other along the height direction of the battery 200, so that the two heating structures can directly act on the parts of the battery 200 that are prone to warping, namely the top and bottom of the battery 200, to avoid heat being wasted in the side areas that do not need to be heated.

[0070] Specifically, the first heating structure 30, driven by the first driving structure 20, presses together the overlapping area of ​​the insulating sheet edge and the blue film fold at the top of the battery 200. The second heating structure 50, driven by the second driving structure 40, conforms to the plane or arc-shaped contour of the blue film fold at the bottom of the battery 200, and heats and flattens the air bubbles and wrinkles of the blue film at the bottom of the battery 200, ensuring that the blue film fold at the bottom is evenly heated and pressed and is not easily lifted.

[0071] Please see Figure 2 Optionally, the first heating structure 30 includes a first heating plate 31 and a first movable plate 32 connected to the first heating plate 31. The first heating plate 31 is disposed toward the battery 200. The first movable plate 32 is movably connected to the first driving structure 20. The first movable plate 32 is capable of moving relative to the first driving structure 20 toward or away from the second driving structure 40.

[0072] In actual production, the height of batteries 200 of different specifications varies, or the actual position of the battery 200 may be slightly offset from the preset position due to the positioning deviation during transport. Therefore, there may be a situation where the first drive structure 20 has exhausted its stroke but the first heating structure 30 has not yet adhered to the battery 200.

[0073] The first movable plate 32 can fill the gap by its own movement, ensuring that the first heating plate 31 can always reliably contact the top of the battery 200, and avoiding heating failure caused by the travel limitation of the first drive structure 20.

[0074] One end of the first movable plate 32 is fixedly connected to the first heating plate 31, and the other end is movably connected to the first driving structure 20. For example, a slide rail and slider can be used, a guide shaft and bushing can be combined, or a connector with elastic buffer can be used to enable the first movable plate 32 to move relative to the first driving structure 20 towards or away from the second driving structure 40.

[0075] The first heating plate 31 acts directly on the battery 200, and its shape can be adapted to the contour of the battery 200. For example, for a square battery 200, the surface of the first heating plate 31 is a flat rectangle, and clearance grooves are formed at the positions corresponding to the battery 200 tabs. For a cylindrical battery 200, the surface of the first heating plate 31 is an arc that matches the curvature of the top of the battery 200.

[0076] In some embodiments, the area of ​​the first heating plate 31 may be smaller than the top or bottom area of ​​the battery 200, and the first heating plate 31 may only heat the blue film folded edge portion or the insulating sheet mounting position of the battery 200.

[0077] The first heating plate 31 may be made of aluminum alloy with high thermal conductivity, and a first heating element 311 is provided inside it. The first heating element 311 can be connected to an external temperature control system through wires. There can be multiple first heating elements 311, which are embedded in the first heating plate 31 in parallel and evenly spaced to ensure uniform heat distribution of the first heating plate 31.

[0078] Similar to the first heating structure 30, the second heating structure 50 includes a second heating plate 51 and a second movable plate 52. The shape of the second heating plate 51 is adapted to the battery 200, and it also has a second heating element 511 inside. The second movable plate 52 can cooperate with the second driving structure 40 through a movable connection to provide compensation when the stroke of the second driving structure 40 is limited, ensuring that the second heating plate 51 is stably attached to the bottom of the battery 200.

[0079] The movable plate is used to compensate for the stroke of the drive structure, so there is no need to frequently adjust the stroke parameters of the drive structure. It can also adapt to the size tolerance and positioning deviation of the battery 200, significantly improving the compatibility of the battery heating device 100 with batteries 200 of different specifications, while ensuring the uniformity of heating pressure and further optimizing the film bonding effect.

[0080] Please see Figure 2 Optionally, the first heating structure 30 includes a first temperature sensor 33, the detection end of which is mounted on the outside of the first heating plate 31, and the first temperature sensor 33 is used to detect the temperature outside the first heating plate 31.

[0081] Since the heat from the first heating plate 31 needs to be transferred to the surface of the blue film, placing the detection end externally avoids temperature control deviations caused by the inconsistency between the heating temperature of the first heating plate 31 and the actual operating temperature, ensuring that the heating temperature of the blue film fold and the edge of the insulating sheet remains stable within a suitable range. By detecting the actual temperature of the area where the first heating plate 31 contacts the battery 200, temperature monitoring of the heating process is achieved.

[0082] The first temperature sensor 33 can be a resistance temperature detector (RTD) or a thermocouple, etc. The detection end of the first temperature sensor 33 can be fixed to the outside of the first heating plate 31 by adhesive bonding or metal clamps. Specifically, it can be installed on the first heating plate 31 or the first driving structure 20; no limitation is made here. The signal output end of the first temperature sensor 33 is electrically connected to the temperature control system of the battery heating device 100 to provide real-time feedback of the detected temperature data. When the detected temperature outside the first heating plate 31 is lower than a preset value, the temperature control system can control the first heating plate 31 to increase its heating power; when the temperature outside the first heating plate 31 is higher than the preset value, the power is reduced.

[0083] Corresponding to the first heating structure 30, the second heating structure 50 may include a third temperature sensor 53. The detection end of the third temperature sensor 53 is installed on the outside of the second heating plate 51. The third temperature sensor 53 is used to detect the actual temperature of the second heating plate 51 acting on the battery 200 in real time, so as to ensure that the temperature of the heating process is adjustable.

[0084] Please see Figure 2 Optionally, the first heating structure 30 includes a second temperature sensor 34, the detection end of which is installed inside the first heating plate 31, and the second temperature sensor 34 is used to detect the temperature inside the first heating plate 31.

[0085] The second temperature sensor 34 can complement the first temperature sensor 33 installed outside the first heating plate 31. The second temperature sensor 34 can measure the actual heating of the heating element inside the first heating plate 31. The second temperature sensor 34 can detect the heat output capacity of the first heating plate 31 in real time, avoiding the decrease in heating efficiency due to problems such as aging of the heating element or poor contact of the internal circuit of the first heating plate 31.

[0086] Specifically, the second temperature sensor 34 can be a patch thermocouple or a miniature resistance temperature detector. The detection end of the second temperature sensor 34 is integrated into the first heating plate 31 by means of embedding or embedding, so as to directly measure the heat generated by the heating element inside the first heating plate 31.

[0087] The signal output terminal of the second temperature sensor 34 is located outside the first heating plate 31 and is electrically connected to the temperature control system of the battery heating device 100. When the actual internal temperature of the first heating plate 31 exceeds the threshold range, the temperature control system can immediately cut off the heating power supply to prevent the first heating plate 31 from overheating and being damaged or the battery cell 200 from being damaged due to excessive heat transfer.

[0088] Similar to the first heating structure 30, the second heating structure 50 may include a fourth temperature sensor 54. The detection end of the fourth temperature sensor 54 is installed inside the second heating plate 51 to monitor the internal heating temperature of the second heating plate 51 and ensure that the temperature of the second heating plate 51 itself is stable and controllable during the bottom heating process.

[0089] The dual monitoring of the internal temperature sensor in the first heating structure 30 and the second heating structure 50, in conjunction with the external temperature sensor, ensures the safe operation of the heating plate itself through the internal sensor, and controls the actual temperature acting on the surface of the battery 200 through the external sensor, thereby further improving the safety and heating accuracy of the battery heating device 100.

[0090] Please see Figure 2Optionally, the first heating structure 30 includes a first back plate 35 connected to the first driving structure 20. The first back plate 35 is installed on the side of the first movable plate 32 away from the first heating plate 31, and heat dissipation holes 351 are provided on the first back plate 35.

[0091] The first back plate 35 enhances the overall rigidity of the first heating structure 30, preventing the first heating plate 31 from deforming under force when clamping the battery 200, and ensuring that the heating surface of the first heating plate 31 facing the battery 200 remains flat, facilitating uniform contact with the surface of the battery 200. After the heating operation is completed, a small amount of heat remaining in the first heating plate 31 and the first movable plate 32 will be conducted to the first back plate 35. The heat dissipation holes 351 increase the contact area between the first back plate 35 and the air, quickly diffusing the heat to the external environment of the battery heating device 100.

[0092] The heat dissipation holes 351 can be designed in the form of circles, strips, or grids, etc., and there are no restrictions here. The first back plate 35 can have multiple heat dissipation holes 351. In addition, the heat dissipation holes 351 can also reduce the weight of the first back plate 35, reduce the load on the first drive structure 20, and thus improve the response speed during movement.

[0093] Similarly, the second heating structure 50 also includes a second back plate 55, which is installed on the side of the second movable plate 52 away from the second heating plate 51. The structure is similar to that of the first back plate 35. The second back plate 55 is also provided with heat dissipation holes 351 to achieve the same functions of rigidity enhancement, heat dissipation and weight reduction.

[0094] Please see Figure 2 Optionally, the first heating structure 30 includes a first reinforcing plate 36, which is used to connect the first back plate 35 and the first drive structure 20.

[0095] The first reinforcing plate 36 can improve the structural strength of the connection between the first back plate 35 and the first driving structure 20, and prevent the connection between the first back plate 35 and the first driving structure 20 from becoming loose or deformed when the first driving structure 20 drives the first heating structure 30 to move for a long time.

[0096] The first reinforcing plate 36 can be made of high-strength metal sheet. The shape of the first reinforcing plate 36 is designed as an L-shape, T-shape, or right-angled triangle. One side of the first reinforcing plate 36 is fixed to the surface of the first back plate 35 away from the first movable plate 32 by bolts, while the other side is rigidly connected to the output end of the first drive structure 20. The first reinforcing plate 36 can disperse and transmit the thrust or pull force generated by the first drive structure 20 to multiple areas of the first back plate 35, avoiding the deformation or loosening of the first back plate 35 caused by the force being concentrated at a single connection point.

[0097] Similarly, the second heating structure 50 also includes a second reinforcing plate (not shown). The function of the second reinforcing plate is the same as that of the first reinforcing plate 36, which is used to connect the second back plate 55 and the second drive structure 40 and enhance the structural strength between the second back plate 55 and the second drive structure 40.

[0098] The coating machine provided in this application includes a stage, a coating device, and a battery heating device 100 as described in any of the above embodiments. The coating device is mounted on the stage. The mounting bracket 10 of the battery heating device 100 is connected to the stage. Since the coating machine of this application uses the battery heating device 100 described above, it has at least the beneficial effects of the battery heating device 100 described above, which will not be repeated here.

[0099] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery heating device, characterized by, include: Fixture; A first driving structure is provided on the fixed frame; A first heating structure is connected to the first driving structure; The second drive structure is disposed on the fixed frame and is arranged opposite to the first drive structure; as well as The second heating structure is connected to the second driving structure; The first driving structure drives the first heating structure to move relative to the fixing frame toward the direction of the second heating structure, and the second driving structure drives the second heating structure to move relative to the fixing frame toward the direction of the first heating structure, so that the first heating structure and the second heating structure clamp the battery and heat the battery.

2. The battery heating apparatus of claim 1, wherein, The driving stroke of the first driving structure is equal to the distance between the initial position of the first heating structure and the battery, the driving stroke of the second driving structure is greater than the driving stroke of the first driving structure, and the output force of the second driving structure is greater than the output force of the first driving structure.

3. The battery heating apparatus of claim 2, wherein, The first driving structure includes a first driving cylinder and a first piston rod. The first driving cylinder is connected to the fixed frame, and the first piston rod is used to drive the first heating structure to move. The second driving structure includes a second driving cylinder and a second piston rod. The second driving cylinder is connected to the fixed frame, and the second piston rod is used to drive the second heating structure to move. The cylinder diameter of the first driving cylinder is smaller than that of the second driving cylinder.

4. The battery heating device of any one of claims 1-3, wherein, The first driving structure drives the first heating structure to move along the height direction of the battery toward the direction closer to the second heating structure, and the second driving structure drives the second heating structure to move along the height direction of the battery toward the direction closer to the first heating structure.

5. The battery heating device of any one of claims 1-3, wherein, The first heating structure includes a first heating plate and a first movable plate connected to the first heating plate. The first heating plate is disposed toward the battery. The first movable plate is movably connected to the first driving structure. The first movable plate is capable of moving relative to the first driving structure toward or away from the second driving structure.

6. The battery heating apparatus of claim 5, wherein, The first heating structure includes a first temperature sensor, the detection end of which is mounted on the outside of the first heating plate, and the first temperature sensor is used to detect the temperature outside the first heating plate.

7. The battery heating apparatus of claim 6, wherein, The first heating structure includes a second temperature sensor, the detection end of which is installed inside the first heating plate, and the second temperature sensor is used to detect the internal temperature of the first heating plate.

8. The battery heating apparatus of claim 5, wherein, The first heating structure includes a first back plate connected to the first driving structure. The first back plate is installed on the side of the first movable plate away from the first heating plate, and heat dissipation holes are provided on the first back plate.

9. The battery heating apparatus of claim 8, wherein, The first heating structure includes a first reinforcing plate, which is used to connect the first back plate and the first driving structure.

10. A wrapping machine characterized by, include: Platform; The coating device is mounted on the platform; as well as The battery heating device according to any one of claims 1-9, wherein the mounting frame of the battery heating device is connected to the platform.

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