Battery cell preheating device

Abstract

The utility model belongs to the technical field of battery production equipment, and particularly relates to a battery cell preheating device. The battery cell preheating device comprises a preheating cavity, the preheating cavity is internally provided with a preheating chamber, and the side wall of the preheating cavity is provided with a feeding port and a discharging port; the rotating mechanism is arranged between the feeding hole and the discharging hole, is suitable for bearing the battery cell, and can move the battery cell into the preheating chamber from the feeding hole and move the battery cell out of the preheating chamber from the discharging hole through rotation; the microwave device is communicated with the preheating chamber, and the microwave device is used for conveying microwaves into the preheating chamber and heating the battery cell in the preheating chamber. According to the utility model, the battery cell is moved into or out of the preheating chamber through the rotating operation of the slewing mechanism, so that the preheating time can be greatly shortened, the excessive preheating can be improved, the quick start and stop can be realized, the energy consumption can be saved, the production efficiency and the product quality can be improved, and the production cost can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production equipment, and in particular relates to a battery core preheating device. Background Art

[0002] At present, in the production process of lithium batteries, the battery cell is usually formed by winding or laminating the positive and negative electrode sheets and the diaphragm. In order to ensure that the electrode sheets and the diaphragm are closely fitted and the thickness of the battery cell is flat, it needs to be preheated or hot-pressed before assembly. Among them, the preheating operation is the process of heating the battery cell under certain temperature and time conditions. At present, the traditional preheating device usually uses a fan to supply air to the preheating cavity so that the entire cavity reaches the set preheating temperature. When the battery cell enters the cavity, it exchanges heat with the hot air to achieve preheating of the battery cell. However, the above-mentioned preheating device and preheating method have the defects of too long preheating time, easy to over-preheat, slow start and stop of the machine, and high energy consumption, which is not conducive to improving the production efficiency and quality of battery products, and the production cost is also relatively high. Utility Model Content

[0003] In view of this, in order to improve at least one of the above problems existing in the prior art, the utility model provides a battery cell preheating device.

[0004] The technical solution of the utility model provides a battery cell preheating device, comprising: a preheating cavity, a preheating chamber is arranged in the preheating cavity, and a feed inlet and a discharge port are arranged on the side wall of the preheating cavity; a rotary mechanism is arranged between the feed inlet and the discharge port, the rotary mechanism is suitable for carrying the battery cell, and can move the battery cell from the feed inlet into the preheating chamber and move the battery cell from the discharge port out of the preheating chamber by rotation; a microwave device is connected to the preheating chamber, and the microwave device is used to transmit microwaves into the preheating chamber and heat the battery cell in the preheating chamber.

[0005] In a feasible implementation, the rotating mechanism includes: a rotating shaft, which is arranged along the height direction and is rotatably connected to the preheating chamber; at least one turntable mechanism, which is connected to the rotating shaft, and each turntable mechanism includes a plurality of rotating trays arranged at circumferential intervals along the rotating shaft, and the rotating trays are used to carry battery cells; a rotating drive mechanism, which is transmission-connected to the rotating shaft to drive the rotating shaft to drive the turntable mechanism to rotate around its own axis.

[0006] In a feasible implementation, the number of rotating trays of each turntable mechanism is n, and the n rotating trays are arranged at equal intervals along the circumference of the rotating shaft; the cross-section of the preheating chamber perpendicular to the rotating shaft is fan-shaped, with the axis of the rotating shaft as the center, and the central angle corresponding to the fan is a=(360-360 / n)°.

[0007] In a feasible implementation, the side wall of the preheating chamber includes a first plane side wall, an arc-shaped side wall and a second plane side wall arranged in sequence along the circumferential direction, and the connection between the first plane side wall and the second plane side wall is rotatably connected to the rotating shaft; wherein, at least one feed port is provided on the first plane side wall, and each feed port is arranged opposite to a turntable mechanism; and at least one discharge port is provided on each second plane side wall, and each discharge port is arranged opposite to a turntable mechanism.

[0008] In a feasible implementation, each feed port is provided with a feed lifting plate, which is slidably connected to the first plane side wall and is suitable for lifting and lowering movement relative to the feed port to open or close the feed port; each discharge port is provided with a discharge lifting plate, which is slidably connected to the second plane side wall and is suitable for lifting and lowering movement relative to the discharge port to open or close the discharge port.

[0009] In a feasible implementation, a feed chute is provided on the first plane side wall, the upper side wall and / or the lower side wall of the feed opening in the height direction, the feed lifting plate is slidably connected to the feed chute, and is configured to be driven by the lifting mechanism to extend out of the feed chute or to be retracted into the feed chute; wherein, a feed sealing member is provided at the side edge of the feed lifting plate; and a discharge chute is provided on the second plane side wall, the upper side wall or the lower side wall of the discharge opening in the height direction, the discharge lifting plate is slidably connected to the discharge chute, and is configured to be driven by the lifting mechanism to extend out of the feed chute or to be retracted into the feed chute; wherein, a discharge sealing member is provided at the side edge of the discharge lifting plate.

[0010] In a feasible implementation, the turntable mechanism includes: a connecting sleeve, which is sleeved on a rotating shaft; a plurality of rotating trays, which are connected to the outer wall of the connecting sleeve, and the plurality of rotating trays are arranged at equal intervals along the circumference of the connecting sleeve, and each rotating tray extends radially along the connecting sleeve; wherein a battery cell positioning groove for carrying a battery cell is provided on the top surface of each rotating tray.

[0011] In a feasible implementation, the battery cell preheating device also includes: a temperature detector, which is arranged in the preheating chamber, and the temperature detector is suitable for rotating synchronously with the rotating tray in the preheating chamber and detecting the temperature of the battery cells on the rotating tray; a controller, which is communicatively connected with the temperature detector, the rotating mechanism and the microwave device, and the controller is suitable for controlling the operation of the rotating mechanism and the microwave device according to the temperature of the battery cells.

[0012] In a feasible implementation, the microwave device includes: a microwave generator for generating microwaves; a waveguide structure, which is a hollow metal tube, one end of the waveguide structure is connected to the microwave generator, and the other end of the waveguide structure is connected to the preheating chamber, and is used to guide the microwaves generated by the microwave generator into the preheating chamber; wherein the inner wall of the preheating cavity is a metal structure suitable for reflecting microwaves, and the rotating tray is a plastic structure suitable for being penetrated by microwaves.

[0013] In a feasible implementation, it also includes: a dehumidification device, which is arranged on the top of the preheating chamber and is connected to the preheating chamber, and the dehumidification device is used to heat the water vapor in the preheating chamber and discharge it to the outside.

[0014] The beneficial effects of the above technical solution of the utility model are embodied in:

[0015] The structure and preheating process of the battery cell preheating device have been improved and optimized. The battery cell can be moved into or out of the preheating chamber through the rotation operation of the rotary mechanism, which can greatly shorten the preheating time, improve over-preheating, and achieve rapid start and stop, which is beneficial to saving energy, improving production efficiency and product quality, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a three-dimensional schematic diagram of a battery cell preheating device provided by an embodiment of the utility model.

[0017] Figure 2 Shown is a three-dimensional schematic diagram of a preheating cavity provided by an embodiment of the utility model.

[0018] Figure 3 Shown is a schematic block diagram of a rotary mechanism provided by an embodiment of the utility model.

[0019] Figure 4 Shown is a three-dimensional schematic diagram of another battery cell preheating cavity provided by an embodiment of the utility model.

[0020] Figure 5 The figure shows a top view of the internal structure of a preheating cavity provided by an embodiment of the utility model.

[0021] Figure 6 Shown is a schematic diagram of a turntable mechanism provided by an embodiment of the utility model.

[0022] Figure 7 Shown is a partial schematic diagram of a turntable mechanism in an assembled state provided by an embodiment of the utility model.

[0023] Figure 8 Shown is a partial schematic diagram of a preheating chamber (feed port position) provided by an embodiment of the utility model.

[0024] Fig. 9 Shown is a partial schematic diagram of a preheating chamber provided by an embodiment of the utility model (discharge port position, discharge lifting plate extended state).

[0025] Fig.10 Shown is a partial schematic diagram of a preheating chamber provided by an embodiment of the utility model (discharge port position, discharge lifting plate extended state).

[0026] Fig.11 Shown is a partial structural schematic diagram of a battery cell preheating device provided by an embodiment of the utility model.

[0027] Fig.12 Shown is a partial structural schematic diagram of another battery cell preheating device provided by an embodiment of the utility model.

[0028] Fig.13 Shown is a partial structural schematic diagram of another battery cell preheating device provided by an embodiment of the utility model.

[0029] Fig.14 Shown is a partial structural schematic diagram of another battery cell preheating device provided by an embodiment of the utility model.

[0030] Fig.15 Shown is a partial structural schematic diagram of another battery cell preheating device provided by an embodiment of the utility model.

[0031] Fig.16 Shown is a partial structural schematic diagram of another battery cell preheating device provided by an embodiment of the utility model.

[0032] Fig.17 Shown is a partial structural schematic diagram of another battery cell preheating device provided by an embodiment of the utility model.

[0033] Among them, Figures 11 to 17 In the figure, the solid arrow indicates the rotation direction of the turntable mechanism.

[0034] Description of reference numerals:

[0035] 100 battery cell preheating device;

[0036] 1 preheating chamber, 11 preheating chamber, 111 first plane side wall, 112 arc-shaped side wall, 113 second plane side wall, 121 feed port, 122 discharge port, 131 feed lifting plate, 132 discharge lifting plate, 151 feed chute, 152 discharge chute, 161 feed seal, 162 discharge seal;

[0037] 2 rotary mechanism, 21 rotary shaft, 22 turntable mechanism, 221 rotary tray, 2211 battery cell positioning groove, 222 connecting sleeve, 23 rotary drive mechanism;

[0038] 3 microwave device, 31 microwave generator, 32 waveguide structure;

[0039] 41: temperature detector, 43: dehumidification device. DETAILED DESCRIPTION

[0040] In the description of the application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically limited. In the embodiment of the present application, all directional indications (such as up, down, left, right, front, back, top, bottom ...) are only used to explain the relative position relationship, motion conditions, etc. between the components under a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their deformations are intended to cover non-exclusive inclusions. For example, the process, method, system, product or equipment comprising a series of steps or units are not limited to the steps or units listed, but optionally also include the steps or units not listed, or optionally also include other steps or units inherent to these processes, methods, products or equipment.

[0041] In addition, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] Application Overview

[0044] In the field of lithium battery technology, positive and negative electrodes and separators are usually wound or stacked to form a battery cell during the production process. In order to ensure that the electrode and separator fit tightly and that the thickness of the battery cell is flat, it is necessary to undergo preheating or hot pressing before assembly. Among them, the preheating operation is the process of heating the wound battery cell under certain temperature and time conditions. The preheating process releases the stress of the electrode formed by the winding method, and at the same time activates the viscosity of the glue layer on the separator, providing good preconditions for the subsequent hot pressing and shaping operation of the battery cell.

[0045] At present, the traditional preheating device usually uses a fan to send air to the preheating cavity so that the entire cavity reaches the set preheating temperature. When the battery cell enters the cavity, it exchanges heat with the hot air to achieve preheating of the battery cell. However, the above-mentioned preheating device and preheating method have the problem of too long preheating time (generally takes 15 to 20 minutes), and it is easy for the preheating time to exceed the normal range (for example, more than 1 hour) due to internal blockage and other reasons, resulting in over-preheating. In addition, the existing preheating device takes a long time to increase and decrease the temperature of the cavity, and the machine starts and stops slowly, which is not conducive to improving the production efficiency and quality of battery products. At the same time, in order to maintain the temperature of the entire cavity, more energy is consumed, and the production cost is relatively high.

[0046] Therefore, it is urgent to develop a new type of preheating device and process to improve the above-mentioned defects and problems of the existing preheating device.

[0047] Some embodiments of the battery cell preheating device in the technical solution of the utility model are provided below.

[0048] In one embodiment of the first aspect of the present invention, a battery cell preheating device 100 is provided. Figure 1 and Figure 2 As shown, the battery cell preheating device 100 includes a preheating cavity 1, a rotating mechanism 2 and a microwave device 3. The preheating cavity 1 is used as the main structure, and a preheating chamber 11 is provided therein, and an inlet 121 and an outlet 122 are provided on the side wall of the preheating cavity 1, which are used as channels for feeding and discharging the battery cells. The rotating mechanism 2 is arranged between the inlet 121 and the outlet 122. The rotating mechanism 2 is used to carry the battery cells and can rotate relative to the preheating cavity 1 to move the battery cells carried on the rotating mechanism 2 from the inlet 121 into the preheating chamber 11, and to move the battery cells from the preheating chamber 11 out of the preheating chamber 11, thereby realizing the feeding and discharging operations of the battery cells. The microwave device 3 is connected to the preheating chamber 11, and the Viborg device is used to transmit microwaves into the preheating chamber 11, so as to heat the battery cells in the preheating chamber 11 with microwaves to realize the preheating operation.

[0049] It is understandable that common preheating devices usually use a heating device and a fan to send hot air to the preheating chamber to preheat the battery cells. However, the machine is slow to start and stop, and the preheating time is long. Once the material is blocked, it is very easy to cause over-preheating, affecting the subsequent process. In addition, since the existing hot air heating method belongs to the traditional heat exchange principle, all objects entering the preheating chamber will exchange heat with the hot air, resulting in low heat utilization and high energy consumption. Microwave heating uses microwave energy to heat objects. Microwaves have obvious characteristics such as short wavelength and high frequency. They can achieve uniform, rapid heating and selective heating, and are sensitive and easy to control.

[0050] The battery cell preheating device 100 in this embodiment adopts a microwave heating method, which can only act on the battery cells in the preheating chamber, and the energy consumption is greatly reduced. Compared with the traditional heating method, the heating energy consumption of the utility model is only 1 / 30 of that of the traditional heating method, and it can achieve rapid start and stop and temperature rise, and the preheating time is greatly shortened, which is beneficial to reducing production costs and improving production efficiency. At the same time, the feeding and discharging operations are performed through the rotation movement of the rotary mechanism 2. If blockage occurs in the subsequent process, the battery cells in the preheating chamber 11 can be quickly removed, which can effectively improve the problem of over-preheating and help improve product quality.

[0051] It should be noted that, in practical applications, the rotary mechanism 2 and the preheating cavity 1 can be set as a split structure according to specific assembly requirements, or the rotary mechanism 2 can be directly set as a structure in which it is rotatably connected to the preheating cavity 1. Preferably, the inner wall surface of the preheating cavity 1 adopts a metal structure suitable for reflecting microwaves, so that after the microwaves enter the preheating chamber 11, the polar molecules can be reflected by the inner wall surface. When the battery cell enters the preheating chamber 11, the polar molecules are rapidly heated by friction under the action of the microwaves, and the entire battery cell is quickly preheated by heat conduction.

[0052] In a further embodiment of the present invention, Figure 2 , Figure 3 and Figure 4As shown, the rotary mechanism 2 includes a rotary shaft 21, a turntable mechanism 22 and a rotary drive mechanism 23. The rotary shaft 21 is arranged in the height direction and is rotatably connected to the preheating chamber 1. One or more turntable mechanisms 22 are connected to the rotary shaft 21. When the number of the turntable mechanisms 22 is multiple, the multiple turntable mechanisms 22 are arranged at intervals in the height direction; each turntable mechanism 22 includes a plurality of rotary trays 221 arranged at intervals along the circumference of the rotary shaft 21, so as to carry the battery cells through the rotary trays 221. The rotary drive mechanism 23 is transmission-connected to the rotary shaft 21, and is used to provide power to drive the rotary shaft 21 and the turntable mechanism 22 to rotate around their own axes, so as to move the battery cells on the rotary trays 221 into or out of the preheating chamber 11. Preferably, the rotating tray 221 is made of a plastic structure suitable for being penetrated by microwaves to prevent the rotating tray 221 from blocking the battery cells, so that all surfaces of the battery cells can be heated under the action of microwaves to achieve more uniform heating.

[0053] It should be noted that if Figure 4 In the example, since the multiple rotary trays 221 of each turntable mechanism 22 rotate synchronously, at the same time, some of the rotary trays 221 on each turntable mechanism 22 are located in the preheating chamber 11, while the other part of the rotary trays 221 are located outside the preheating chamber 11; on the rotation path of the rotary trays 221, outside the preheating chamber 11, the space from the discharge port 122 to the feed port 121 can be used as an operating space for unloading and loading materials, and inside the preheating chamber 11, the area from the feed port 121 to the discharge port 122 is the preheating space.

[0054] When in use, the empty rotary tray 221 performs loading operations outside the preheating chamber 11 and carries the battery cells; then it enters the preheating chamber 11 through the feed port 121 by rotation, and the battery cells are preheated by the microwave while rotating in the preheating chamber 11 with the rotary tray 221; the preheated battery cells continue to rotate driven by the rotary tray 221, and are moved out of the preheating chamber 11 through the discharge port 122, and then unloading operations are performed outside the preheating chamber 11, completing a working cycle; after unloading, the rotary tray 221 can carry the battery cells again and continue to enter the next working cycle.

[0055] In this embodiment, a plurality of turntable mechanisms 22 can be arranged in the height direction, and each turntable mechanism 22 is provided with a plurality of rotating trays 221, so that the space of the preheating chamber 1 in the height direction can be fully utilized, and a plurality of battery cells can be preheated at the same time, thereby greatly improving the production efficiency. Moreover, a plurality of turntable mechanisms 22 can be driven simultaneously by a set of rotating drive mechanisms 23 and rotating shafts 21, thereby further saving energy consumption.

[0056] Furthermore, if Figure 4 and Figure 5As shown, in each turntable mechanism 22, the number of the rotating trays 221 is n, and the n rotating trays 221 are arranged at equal intervals along the circumference of the rotating shaft 21; correspondingly, the cross section of the preheating chamber 1 perpendicular to the rotating shaft 21 is a sector with the axis of the rotating shaft 21 as the center, and the central angle a corresponding to the sector is (360-360 / n)°. Figure 5 and Figure 6 In the example, the number of rotary trays 221 n=3, then the angle between two adjacent rotary trays 221 is 120°, and correspondingly, the central angle a corresponding to the sector is 240°; the above angle setting makes the angle of the rotary tray 221 correspond to the central angle of the preheating chamber 1, and the turntable mechanism 22 can perform a loading and unloading operation every 120° rotation, which can ensure that at any time at least one rotary tray 221 is located in the preheating chamber 11, and at least one rotary tray 221 is located outside the preheating chamber 11. In the extreme case, Figure 5 In the state shown in the figure, one rotary tray 221 is located in the middle position of the preheating chamber 11, one rotary tray 221 is at the feeding port 121, and the other rotary tray 221 is at the discharging port 122; after rotating through a certain angle, the two rotary trays 221 can be simultaneously located in the preheating chamber 11 for preheating the battery cells, and the other rotary tray 221 is located outside the preheating chamber 11 for unloading and loading operations.

[0057] It should be noted that the above is only one of the preferred examples of the present invention, and the number of the rotary trays 221 can also be set to other numbers according to specific needs, and the central angle of the fan-shaped cross section of the preheating chamber 1 is also changed accordingly. For example, when the number of rotary trays 221 n=4, the interval between any two rotary trays 221 is 90°, the central angle a=270°, and the turntable mechanism 22 can perform a loading and unloading operation every 90° rotation.

[0058] The arrangement in this embodiment can achieve the corresponding arrangement between the rotary tray 221 and the preheating chamber 1, so that preheating, feeding and discharging can be organically coordinated, which is beneficial to further shorten the preparation time and improve production efficiency.

[0059] In a further embodiment of the present invention, Figure 2 and Figure 4As shown, the side wall of the preheating chamber 1 includes a first plane side wall 111, an arcuate side wall 112 and a second plane side wall 113 arranged in sequence along the circumferential direction, and the first plane side wall 111, the arcuate side wall 112 and the second plane side wall 113 as well as the top wall and the bottom wall together form the preheating chamber 11; wherein, the connection between the first plane side wall 111 and the second plane side wall 113 is rotatably connected to the rotating shaft 21, so that the preheating chamber 1 forms a rotating body with a fan-shaped cross section. At least one feed port 121 is provided on the first planar side wall 111, and each feed port 121 is arranged opposite to a turntable mechanism 22; similarly, at least one discharge port 122 is provided on the second planar side wall 113, and each discharge port 122 is arranged opposite to a turntable mechanism 22, that is, the number of turntable mechanisms 22, feed ports 121, and discharge ports 122 is the same, so that each turntable mechanism 22 is simultaneously opposite to a feed port 121 on the first planar side wall 111 and an discharge port 122 on the second planar side wall 113, so that the rotary tray 221 can be moved into the preheating chamber 11 from the feed port 121 through rotation, and can be moved out of the preheating chamber 11 from the discharge port 122.

[0060] Preferably, if Figure 4 In the example, five turntable mechanisms 22, five feed ports 121 and five discharge ports 122 are sequentially arranged in the height direction; of course, according to the specific size and design requirements of the preheating chamber 1, the turntable mechanism 22, the feed port 121 and the discharge port can also be set to other numbers.

[0061] Furthermore, if Figure 2 and Figure 4 As shown, each feed port 121 is provided with a feed lifting plate 131 for opening or closing the feed port 121; the feed lifting plate 131 is slidably connected to the first plane side wall 111, and can be lifted and lowered relative to the feed port 121. Similarly, each discharge port 122 is provided with a discharge lifting plate 132 for opening or closing the discharge port 122; the discharge lifting plate 132 is slidably connected to the second plane side wall 113, and can be lifted and lowered relative to the discharge port 122. Among them, both the feed lifting plate 131 and the discharge lifting plate 132 can be driven by corresponding lifting mechanisms to perform lifting movements. By providing the feed lifting plate 131 and the discharge lifting plate 132, the feed port 121 and the discharge port 122 can be opened and closed according to the rotation position of the rotary tray 221, so that the preheating chamber 11 can be kept in a closed state in the closed state to prevent the preheating process of the battery cell from being affected.

[0062] Furthermore, if Figure 4 , Figure 7 and Figure 8As shown, on the first plane side wall 111, a feed chute 151 is provided on the lower side wall of the feed opening 121 in the height direction, and a feed lifting plate 131 is provided in the feed chute 151 and is slidably connected to the feed chute 151, so as to extend out of the feed chute 151 in the height direction and retract into the feed chute 151 under the drive of the lifting mechanism, so as to close the feed opening 121 when extending and open the feed opening 121 when retracting. Among them, a feed seal 161 is provided at the side edge of the feed lifting plate 131 to seal the gap between the feed lifting plate 131 and the feed opening 121.

[0063] It should be noted that, in actual applications, the feed chute 151 can also be set in other positions according to specific assembly requirements; for example, the feed chute 151 can also be set in the upper side wall of the feed port 121, and the feed lifting plate 131 extends downward from the top of the feed port 121 to close the feed port 121; or the feed chute 151 is set on the upper side wall and the lower side wall of the feed port 121 at the same time, and when the feed lifting plate 131 closes the feed port 121, the top of the feed lifting plate 131 is located in the upper feed chute 151, and the bottom of the feed lifting plate 131 is located in the lower feed chute 151; in addition, in order to enhance the sealing effect, similar feed chutes 151 can also be set on the left and right sides of the feed port 121, such as Figure 7 In the example, the left and right sides of the feed lifting plate 131 can be located in the corresponding feed chute 151 during the lowering process.

[0064] like Figure 4 , Fig. 9 and Fig.10 As shown, on the second plane side wall 113, a discharge chute 152 is provided on the lower side wall of the discharge port 122 in the height direction, and a discharge lifting plate 132 is provided in the discharge chute 152 and is slidably connected to the discharge chute 152, so as to extend out of the discharge chute 152 or retract into the discharge chute 152 in the height direction under the drive of the lifting mechanism, so as to close the discharge port 122 when extending, and open the discharge port 122 when retracting. Among them, a discharge sealing member 162 is provided at the side edge of the discharge lifting plate 132 to seal the gap between the discharge lifting plate 132 and the discharge port 122.

[0065] It should be noted that, in actual applications, the discharge chute 152 can also be set in other positions according to specific assembly requirements; for example, the discharge chute 152 can also be set in the upper side wall of the discharge port 122, and the discharge lifting plate 132 extends downward from the top of the discharge port 122 to close the discharge port 122; or the discharge chute 152 is set on the upper side wall and the lower side wall of the discharge port 122 at the same time, when the discharge lifting plate 132 closes the discharge port 122, the top of the discharge lifting plate 132 is located in the upper discharge chute 152, and the bottom of the discharge lifting plate 132 is located in the lower discharge chute 152; in addition, in order to enhance the sealing effect, similar discharge chutes 152 can also be set on the left and right sides of the discharge port 122, such as Fig. 9 In the example, the left and right sides of the discharge lifting plate 132 can be located in the corresponding discharge chute 152 during the lifting process.

[0066] Preferably, the feed seal 161 and the discharge seal 162 are made of silicone rubber and fixed to the side edge of the corresponding lifting plate by screws, and the side of the feed seal 161 and the discharge seal 162 away from the corresponding lifting plate is in sealing contact with the rotating shaft 21. The lifting mechanism can specifically adopt a servo motor. In addition, the feed lifting plate 131 and the discharge lifting plate 132 adopt a technical structure suitable for reflecting microwaves. In the closed state, when microwaves are transmitted to the inner side walls of the feed lifting plate 131 and the discharge lifting plate 132, they can also be reflected and continue to heat the battery cells in the preheating chamber 11.

[0067] The inlet lifting plate 131 and the outlet lifting plate 132 in this embodiment adopt an embedded design, which effectively utilizes the internal space of the first plane side wall 111 and the second plane side wall 113, does not need to occupy the space inside and outside the preheating chamber 11, is easy to operate, avoids interference with the rotating tray 221, and has a better spatial layout.

[0068] In a further embodiment of the present invention, Figures 4 to 6 As shown, the turntable mechanism 22 includes a connecting sleeve 222 and a plurality of rotating trays 221. The connecting sleeve 222 is sleeved on the rotating shaft 21; the rotating trays 221 are connected to the outer wall of the connecting sleeve 222, and the plurality of rotating trays 221 are arranged at equal intervals along the circumference of the connecting sleeve 222; each rotating tray 221 extends along the radial direction of the connecting sleeve 222; and a battery cell positioning groove 2211 is provided on the top surface of each rotating tray 221 for fixing the battery cell to prevent the battery cell from falling off the rotating tray 221.

[0069] Preferably, the rotary tray 221 adopts Figure 6The fan-shaped structure shown in the figure makes the turntable mechanism 22 as a whole form a structure similar to a wind wheel. When the rotating shaft 21 rotates, the multiple rotating trays 221 are driven by the connecting sleeve 222 to move into the preheating chamber 11 from the inlet 121 in sequence to preheat the battery cells on the rotating trays 221, and then move out of the preheating chamber 11 from the outlet 122 in sequence.

[0070] In a further embodiment of the present invention, Figures 1 to 4 As shown, the battery cell preheating device 100 also includes a thermometer 41 and a controller. The thermometer 41 is rotatably disposed in the preheating chamber 11, and is used to detect the temperature of the battery cells on the rotary tray 221 in the preheating chamber 11, and when the rotary tray 221 rotates, the thermometer 41 can rotate synchronously with the rotary tray 221 to form a follow-up structure and continuously detect the temperature of the battery cells. Preferably, a thermometer 41 is correspondingly disposed for each layer of the rotary tray 221, and the setting height of each thermometer 41 is consistent with the corresponding battery cell height, so as to obtain the temperature value of the battery cell; the thermometer 41 can specifically adopt a follow-up optical temperature measuring instrument.

[0071] The controller is connected in communication with the temperature detector 41, the rotary mechanism 2 and the microwave device 3. The controller can obtain the temperature data of the battery cell through the temperature detector 41, and control the rotary mechanism 2 and the microwave device 3 to work accordingly, such as adjusting the rotation speed of the rotary mechanism 2, the working gear of the microwave device 3, etc. Among them, when the feed lifting plate 131 and the discharge lifting plate 132 are provided, the controller can also establish a communication connection with the driving mechanism of the feed lifting plate 131 and the discharge lifting plate 132 to control the movement of the feed lifting plate 131 and the discharge lifting plate 132 according to the rotation of the rotary tray 221, so that the feed port 121 and the discharge port 122 are opened or closed according to the position of the rotary tray 221, forming mutual cooperation.

[0072] In a further embodiment of the present invention, Figure 1 and Figure 4 As shown, the microwave device 3 includes a microwave generator 31 and a waveguide structure 32. The microwave generator 31 can generate microwaves; the waveguide structure 32 is specifically a hollow metal tube, one end of the waveguide structure 32 is connected to the microwave generator 31, and the other end of the waveguide structure 32 is connected to the microwave preheating chamber 11. The microwaves generated in the microwave generator 31 can enter the preheating chamber 11 through the waveguide structure 32, thereby heating the battery core. Among them, the metal tubular waveguide structure 32 can emit microwaves and guide the microwaves into the preheating chamber 11; the waveguide structure 32 is not limited to Figure 4 The L-shaped tube body shown in the figure can also adopt a straight tube, a curved tube or a tube body structure of other shapes according to specific assembly requirements.

[0073] Preferably, the inner wall of the preheating chamber 11 also adopts a metal structure suitable for reflecting microwaves, and the rotary tray 221 adopts a plastic structure suitable for being penetrated by microwaves.

[0074] In a further embodiment of the present invention, Figure 1 and Figure 4 As shown, the battery cell preheating device 100 further includes a dehumidification device 43. The dehumidification device 43 is disposed at the top of the preheating cavity 1, and the dehumidification device 43 is connected to the preheating chamber 11, so as to heat the water vapor generated in the preheating chamber 11 and discharge it to the outside, thereby achieving a dehumidification effect, thereby reducing the water content in the preheating chamber 11, keeping the preheating chamber 11 in a dry state, and preventing the water from reacting with the microwaves and interfering with the heating of the battery cell. The dehumidification device 43 is not limited to Figure 4 The tubular structure shown in the figure may also adopt other structural forms according to assembly requirements in specific applications.

[0075] The following is an example of a specific application process of the battery cell preheating device 100 of the present invention.

[0076] like Figure 4 In the example, after the battery cell preheating device 100 is turned on, the microwave generator 31 starts to operate, and the generated microwaves enter the preheating chamber 11 through the waveguide structure 32 and are continuously reflected in the preheating chamber 11, completing the prerequisite for microwave heating.

[0077] Figures 11 to 17 The working status of the turntable mechanism 22 at different time nodes in a rotation cycle is shown in chronological order, and the main operations involved in this process are loading, preheating, unloading, etc. Among them, each turntable mechanism 22 is provided with three rotating trays 221 arranged at equal intervals in the circumferential direction, namely tray No. 1, tray No. 2 and tray No. 3, which are used to carry battery cells (battery cells are not shown in the figure); any two adjacent rotating trays 221 are spaced 120° apart, and the central angle of the fan-shaped cross section of the preheating cavity 1 is 240°. From a top view, the rotating shaft 21 and the turntable mechanism 22 rotate in a counterclockwise direction.

[0078] like Fig.11 In the example, tray No. 1 has completed loading and is about to be moved into the preheating chamber 11 through the feed port 121; tray No. 2 is located in the preheating chamber 11, and the battery cells carried on tray No. 2 are being preheated; and tray No. 3 is being moved out of the preheating chamber 11 through the discharge port 122.

[0079] As the turntable mechanism 22 rotates, Fig.12In the example, the feed port 121 is open, and tray No. 1 is in the process of being moved from the feed port 121 into the preheating chamber 11; tray No. 2 is still in the preheating chamber 11; tray No. 3 has been completely moved out from the discharge port 122, and the discharge lifting plate 132 has closed the discharge port 122, and the battery cells on tray No. 3 can now be unloaded.

[0080] Furthermore, if Fig.13 and Fig.14 In the example, tray No. 1 has been completely moved into the preheating chamber 11, and the feed lifting plate 131 closes the feed port 121; tray No. 2 is still in the preheating chamber 11 but is located near the discharge port 122; tray No. 3 is outside the preheating chamber 11 and is in the process of rotating near the feed port 121.

[0081] Furthermore, if Fig.15 In the example, tray No. 1 is located in the preheating chamber 11, and the battery cells on tray No. 1 are being preheated; the battery cells on tray No. 2 have completed the preheating treatment, and the discharge port 122 is opened, and tray No. 2 is being moved outward from the discharge port 122; tray No. 3 has completed the battery cell loading at this time, and is preparing to be moved into the preheating chamber 11 from the feed port 121.

[0082] Furthermore, if Fig.16 In the example, tray No. 1 is still in the preheating chamber 11, but is located near the discharge port 122; tray No. 2 is outside the preheating chamber 11 and is rotating toward the feed port 121; tray No. 3 is in the preheating chamber 11 and the cells on tray No. 3 are being preheated.

[0083] Furthermore, if Fig.17 In the example, the battery cells on tray No. 1 have completed the preheating treatment. At this time, the discharge port 122 is opened, and tray No. 1 is being moved outward from the discharge port 122; tray No. 2 has completed the battery cell loading operation and is preparing to be moved into the preheating chamber 11 from the feed port 121; tray No. 3 is still in the preheating chamber 11 at this time, and the battery cells on tray No. 3 continue to be preheated.

[0084] According to the above Figures 11 to 17 In the example, the turntable mechanism 22 completes one rotation cycle, that is, completes one working cycle. After repeatedly performing the above working cycle, different battery cells enter the preheating chamber 11 in turn to complete the preheating treatment, forming an assembly line operation. Among them, when a multi-layer turntable mechanism 22 is set, the rotary trays 221 of different layers at the same position perform loading operations and unloading operations at the same time.

[0085] The basic principle of the present invention is described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, strengths, effects, etc. mentioned in the present invention are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present invention. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not limitation, and the above details do not limit the present invention to being implemented by adopting the above specific details.

[0086] The block diagrams of the devices, apparatuses, equipment and systems involved in the present utility model are only illustrative examples and are not intended to require or imply that they must be connected, arranged and configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment and systems can be connected, arranged and configured in any manner. Words such as "including", "comprising", "having" and the like are open words, referring to "including but not limited to" and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to" and can be used interchangeably with them. It should also be noted that in the apparatus and equipment of the present utility model, each component can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present utility model.

[0087] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize some variations, modifications, changes, additions and sub-combinations thereof. The above description of the disclosed aspects is provided to enable any technician in the field to make or use the utility model. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the utility model. Therefore, the utility model is not intended to be limited to the aspects shown herein, but in accordance with the widest range consistent with the principles and novel features of this utility model.

[0088] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery cell preheating device, characterized in that: include: A preheating cavity (1), wherein a preheating chamber (11) is provided in the preheating cavity (1), and a material inlet (121) and a material outlet (122) are provided on a side wall of the preheating cavity (1); a rotating mechanism (2) disposed between the feed inlet (121) and the discharge outlet (122); the rotating mechanism (2) is suitable for carrying the battery cell and is capable of moving the battery cell from the feed inlet (121) into the preheating chamber (11) and moving the battery cell from the discharge outlet (122) out of the preheating chamber (11) by rotating; A microwave device (3) is connected to the preheating chamber (11), and the microwave device (3) is used to transmit microwaves into the preheating chamber (11) and heat the electric core in the preheating chamber (11).

2. The battery cell preheating device according to claim 1, characterized in that: The rotary mechanism (2) comprises: A rotary shaft (21) is arranged along the height direction and is rotatably connected to the preheating chamber (1); At least one turntable mechanism (22) connected to the rotary shaft (21), each of the turntable mechanisms (22) comprising a plurality of turntable trays (221) arranged at intervals along the circumference of the rotary shaft (21), the turntable trays (221) being used to carry battery cells; The rotary drive mechanism (23) is in driving connection with the rotary shaft (21) so as to drive the rotary shaft (21) to drive the turntable mechanism (22) to rotate around its own axis.

3. The battery cell preheating device according to claim 2, characterized in that: The number of the rotary trays (221) of each rotary disk mechanism (22) is n, and the n rotary trays (221) are arranged at equal intervals along the circumference of the rotary shaft (21); The cross section of the preheating chamber (1) perpendicular to the rotating shaft (21) is fan-shaped, the fan-shaped has the axis of the rotating shaft (21) as the center, and the central angle corresponding to the fan-shaped is a=(360-360 / n)°.

4. The battery cell preheating device according to claim 3, characterized in that: The side wall of the preheating chamber (1) comprises a first plane side wall (111), an arcuate side wall (112) and a second plane side wall (113) which are sequentially arranged along the circumferential direction, and the connection between the first plane side wall (111) and the second plane side wall (113) is rotatably connected to the rotary shaft (21); Wherein, at least one feed inlet (121) is provided on the first plane side wall (111), and each feed inlet (121) is arranged opposite to one of the turntable mechanisms (22); Each of the second planar side walls (113) is provided with at least one discharge port (122), and each of the discharge ports (122) is arranged opposite to one of the turntable mechanisms (22).

5. The battery cell preheating device according to claim 4, characterized in that: A feed lifting plate (131) is provided at each of the feed openings (121), the feed lifting plate (131) being slidably connected to the first plane side wall (111) and being adapted to perform lifting motion relative to the feed opening (121) so as to open or close the feed opening (121); A discharge lifting plate (132) is provided at each of the discharge ports (122). The discharge lifting plate (132) is slidably connected to the second planar side wall (113) and is suitable for lifting and lowering relative to the discharge port (122) to open or close the discharge port (122).

6. The battery cell preheating device according to claim 5, characterized in that: On the first plane side wall (111), an upper side wall and / or a lower side wall of the feed opening (121) in the height direction are provided with a feed chute (151), and the feed lifting plate (131) is slidably connected with the feed chute (151), and is configured to be driven by a lifting mechanism to extend out of the feed chute (151) or to be retracted into the feed chute (151); wherein a feed seal (161) is provided at the side edge of the feed lifting plate (131); On the second plane side wall (113), a discharge chute (152) is provided on the upper side wall or the lower side wall of the discharge port (122) in the height direction, and the discharge lifting plate (132) is slidably connected to the discharge chute (152) and is configured to be driven by a lifting mechanism to extend out of the feed chute (151) or to be retracted into the feed chute (151); wherein a discharge seal (162) is provided at the side edge of the discharge lifting plate (132).

7. The battery cell preheating device according to claim 2, characterized in that: The turntable mechanism (22) comprises: A connecting sleeve (222) sleeved on the rotating shaft (21); A plurality of the rotary trays (221) are connected to the outer wall of the connecting sleeve (222); the plurality of the rotary trays (221) are arranged at equal intervals along the circumference of the connecting sleeve (222), and each of the rotary trays (221) extends along the radial direction of the connecting sleeve (222); Wherein, a cell positioning groove (2211) for carrying a cell is provided on the top surface of each of the rotary trays (221).

8. The battery cell preheating device according to any one of claims 2 to 7, characterized in that: Also includes: A temperature detector (41) is disposed in the preheating chamber (11), the temperature detector (41) being adapted to rotate synchronously with the rotary tray (221) in the preheating chamber (11) and to detect the temperature of the battery cells on the rotary tray (221); A controller is connected in communication with the temperature measuring device (41), the rotating mechanism (2) and the microwave device (3), and the controller is suitable for controlling the operation of the rotating mechanism (2) and the microwave device (3) according to the temperature of the battery core.

9. The battery cell preheating device according to any one of claims 2 to 7, characterized in that: The microwave device (3) comprises: A microwave generator (31) for generating microwaves; a waveguide structure (32), wherein the waveguide structure (32) is a hollow metal tube, one end of the waveguide structure (32) is connected to the microwave generator (31), and the other end of the waveguide structure (32) is connected to the preheating chamber (11), and is used to guide the microwaves generated by the microwave generator (31) into the preheating chamber (11); The inner wall of the preheating cavity (1) is a metal structure suitable for reflecting microwaves, and the rotating tray (221) is a plastic structure suitable for being penetrated by microwaves.

10. The battery cell preheating device according to any one of claims 1 to 7, characterized in that: Also includes: A dehumidification device (43) is arranged at the top of the preheating chamber (1) and is connected to the preheating chamber (11). The dehumidification device (43) is used to heat the water vapor in the preheating chamber (11) and discharge it to the outside.

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