Cell preheating device and battery production line

Abstract

The present invention provides a battery cell preheating device and a battery production line. Among them, the battery cell preheating device includes: a preheating furnace, which includes a housing, a drum, and a heating structure. The drum is rotatably arranged in the housing. A material passing opening is arranged on the side wall of the housing, and the material passing opening extends along the axial direction of the preheating furnace. A battery cell placement rack is arranged on the side wall of the drum, and the heating structure is adapted to heat the space inside the housing. When the battery cell preheating device preheats the battery cell, the battery cell is placed on the battery cell placement rack of the drum from the material passing opening of the housing. Then the heating structure heats the space inside the housing, and at the same time the drum rotates. When the preheating of the battery cell is completed, the battery cell is taken out from the material passing opening to complete the preheating process. In the above structure, the rotary preheating furnace has a compact and simple structure and occupies a small volume while ensuring that the battery cell has a sufficient long travel path, which is beneficial to reducing the overall floor area of the battery production line and reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production equipment, and particularly relates to a battery cell preheating device and a battery production line. Background Art

[0002] Battery cell preheating is one of the processes in battery manufacturing. In the battery cell preheating process, a preheating tunnel furnace is required. The battery cells are placed on a fixed fixture and circulated in the preheating tunnel furnace. The preheating tunnel furnace can heat the battery cells through hot air circulation, contact, and electromagnetic induction. However, the existing preheating tunnel furnace has a long tunnel length, resulting in a large overall occupied space of the equipment and a complex internal structure. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the existing battery cell preheating tunnel furnace with a large occupied space and a complex internal structure, so as to provide a battery cell preheating device and a battery production line.

[0004] To solve the above problems, the present invention provides a battery cell preheating device, including: a preheating furnace, which includes a housing, a drum, and a heating structure. The drum is rotatably arranged in the housing. A material passing opening is arranged on the side wall of the housing, and the material passing opening extends along the axial direction of the preheating furnace. A battery cell placement rack is arranged on the side wall of the drum, and the heating structure is adapted to heat the space inside the housing.

[0005] Optionally, the preheating furnace is of a horizontal structure. The drum includes a cylindrical body, and through holes are arranged on the wall of the cylindrical body. The battery cell placement rack is arranged on the outer side wall of the cylindrical body, and the heating structure is arranged inside the cylindrical body.

[0006] Optionally, the material passing opening includes a feed opening and a discharge opening arranged at intervals. The battery cell preheating device further includes: a loading mechanism, arranged on one side of the preheating furnace and corresponding to the feed opening, and the loading mechanism is adapted to place the battery cells on the battery cell placement rack from the feed opening; an unloading mechanism, arranged on the other side of the preheating furnace and corresponding to the discharge opening, and the unloading mechanism is adapted to take out the battery cells from the discharge opening.

[0007] Optionally, the battery cell placement rack includes a plurality of support rods, and the plurality of support rods form a horizontal and vertical criss-cross structure on the cylindrical body.

[0008] Optionally, the cylindrical body includes: a plurality of annular plates, which are arranged at intervals along the axial direction of the cylindrical body; a plurality of connecting plates, which extend along the axial direction of the cylindrical body and are connected to all the annular plates. The plurality of annular plates are arranged at intervals along the circumferential direction of the cylindrical body, and a plurality of support rods are arranged at intervals on each connecting plate.

[0009] Optionally, the cylindrical body is formed by bending a plate and connecting the two ends. Through holes are arranged on the plate, threaded holes are arranged on the plate, and the support rod is provided with an external threaded section, and the external threaded section is inserted into the threaded hole.

[0010] Optionally, the heating structure includes a blower, a heater, and a filter. Among them, the filter is arranged at the air inlet of the blower, and the heater is arranged at the air outlet of the blower.

[0011] Optionally, the heating structure further includes a wind guide cover, and a wind channel is formed between the wind guide cover and the inner side wall of the cylinder.

[0012] Optionally, both the loading mechanism and the unloading mechanism include: a frame; a plurality of clamping jaws movably arranged on the frame, and the plurality of clamping jaws are arranged at intervals along the axial direction of the preheating furnace.

[0013] Optionally, the battery cell preheating device further includes a driving mechanism, and the driving mechanism is adapted to drive the roller to rotate.

[0014] Optionally, the driving mechanism includes: a ratchet wheel arranged on the outer side wall of the roller; a driving cylinder arranged in the housing; a pawl connected to the push rod of the driving cylinder, and the pawl is adapted to cooperate with the ratchet wheel.

[0015] Optionally, the preheating furnace is of a vertical structure. The battery cell placement rack includes a tray rotatably arranged on the roller. The battery cell preheating device further includes a loading and unloading mechanism corresponding to the material passing port. The loading and unloading mechanism is adapted to place the battery cell from the material passing port onto the tray, or to take out the battery cell from the material passing port.

[0016] Optionally, there are a plurality of trays, and the plurality of trays are arranged at intervals along the circumferential direction of the roller.

[0017] Optionally, the tray is multi-layered.

[0018] The present invention also provides a battery production line including the above-mentioned battery cell preheating device.

[0019] The present invention has the following advantages:

[0020] By using the technical solution of the present invention, when the battery cell preheating device preheats the battery cell, the battery cell is placed from the material passing port of the housing onto the battery cell placement rack of the roller. Then the heating structure heats the space inside the housing, and at the same time the roller rotates. When the battery cell preheating is completed, the battery cell is taken out from the material passing port to complete the preheating process. In the above structure, the rotary preheating furnace has a compact and simple structure and a small occupied volume while ensuring that the battery cell has a sufficiently long traveling path, which is beneficial to reducing the overall floor area of the battery production line and reducing costs. Therefore, the technical solution of the present invention solves the defects of the existing battery cell preheating tunnel furnace that occupies a large space and has a complex internal structure. Description of the Drawings

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 Fig. 4 shows a schematic structural diagram of the first embodiment of the battery cell preheating device of the present invention;

[0023] Figure 2 Fig. Figure 1 shows an enlarged schematic view of part A in Fig.

[0024] Figure 3 Fig. Figure 1 shows an enlarged schematic view of part B in Fig.

[0025] Figure 4 Fig. Figure 1 shows a schematic structural diagram of the drum of the battery cell preheating device in Fig.

[0026] Figure 5 Fig. Figure 4 shows an enlarged schematic view of part C in Fig.

[0027] Figure 6 Fig. Figure 4 shows a sectional schematic view of the drum in Fig. (the heating structure is not shown);

[0028] Figure 7 Fig. Figure 6 shows an enlarged schematic view of part D in Fig.

[0029] Figure 8 Fig. Figure 4 shows a side view schematic diagram of the drum in Fig.

[0030] Figure 9 Fig. Figure 4 shows a schematic diagram of the internal structure of the drum in Fig.

[0031] Figure 10 Fig. Figure 4 shows a sectional schematic view of the drum in Fig. (the heating structure is shown);

[0032] Figure 11 Fig. Figure 10 shows a layout schematic diagram of multiple blowers of the drum in Fig.

[0033] Figure 12 Fig. Figure 1 shows a schematic structural diagram of the feeding mechanism or the discharging mechanism of the battery cell preheating device in Fig.

[0034] Figure 13Shows a schematic structural diagram of the drum in the second embodiment of the battery cell preheating device of the present invention;

[0035] Figure 14 Shows Figure 13 The enlarged schematic diagram at position E in;

[0036] Figure 15 Shows a schematic structural diagram of the preheating furnace in the third embodiment of the battery cell preheating device of the present invention; and

[0037] Figure 16 Shows Figure 15 The internal structural schematic diagram of the preheating furnace from a top view perspective in.

[0038] Explanation of reference numerals:

[0039] 1. Battery cell; 10. Preheating furnace; 11. Housing; 12. Drum; 121. Cylinder body; 1211. Annular plate; 1212. Connecting plate; 122. Air passing hole; 13. Heating structure; 131. Fan; 132. Heater; 133. Filter; 134. Air guiding cover; 20. Material passing port; 21. Feeding port; 22. Discharging port; 30. Battery cell placement rack; 31. Support rod; 32. Tray; 40. Loading mechanism; 50. Unloading mechanism; 60. Frame; 70. Claw; 80. Driving mechanism; 81. Ratchet; 82. Driving cylinder; 83. Pawl. Detailed implementation manners

[0040] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] Embodiment 1:

[0045] As Figures 1 to 4 shown, the battery cell preheating device of Embodiment 1 includes a preheating furnace 10. Among them, the preheating furnace 10 includes a housing 11, a drum 12, and a heating structure 13. The drum 12 is rotatably arranged in the housing 11. A material passing port 20 is arranged on the side wall of the housing 11, and the material passing port 20 extends along the axial direction of the preheating furnace 10. A battery cell placement rack 30 is arranged on the side wall of the drum 12, and the heating structure 13 is adapted to heat the space inside the housing 11.

[0046] Using the technical solution of this embodiment, when the battery cell preheating device preheats the battery cell 1, the battery cell 1 is placed on the battery cell placement rack 30 of the drum 12 through the material passing port 20 of the housing 11. Then the heating structure 13 heats the space inside the housing 11, and at the same time the drum 12 rotates. When the preheating of the battery cell 1 is completed, the battery cell is taken out from the material passing port 20 to complete the preheating process. In the above structure, the rotary preheating furnace has a compact and simple structure and a small occupied volume while ensuring that the battery cell 1 has a sufficiently long traveling path, which is beneficial to reducing the overall floor area of the battery production line and reducing costs. Therefore, the technical solution of this embodiment solves the defects of the existing battery cell preheating tunnel furnace, which has a large occupied space and a complex internal structure.

[0047] It should be noted that the above-mentioned material passing port 20 refers to a through-port structure that can allow the battery cell 1 to pass through. In this embodiment, the material passing port 20 extends along the axial direction of the preheating furnace 10 and forms a long and narrow structure. Further, the battery cell 1 is inserted horizontally into the housing 11, so the width of the material passing port 20 should be greater than the thickness of the battery cell 1.

[0048] Further, as Figure 2As shown, the battery cell 1 can be fed into the housing 11 through the material passing opening 20 by means of a manipulator, a gripper or manually, and placed on the battery cell placement rack 30. When the roller 12 rotates, it can drive the battery cell 1 to rotate synchronously through the battery cell placement rack 30. After the preheating of the battery cell 1 is completed, the battery cell 1 can be removed from the battery cell placement rack 30 by the above-mentioned method and discharged through the material passing opening 20.

[0049] As Figure 1 and Figure 2 shown, the roller 12 in this embodiment is cylindrical. Correspondingly, the housing 11 has a cylindrical structure. The roller 12 is arranged inside the housing 11. Therefore, the space enclosed by the two is cylindrical. The above-mentioned cylindrical roller 12 and cylindrical housing 11 have the following advantages:

[0050] 1. The outer surface space of the roller 12 can be fully utilized, as many battery cell placement racks 30 as possible can be arranged on the outer wall of the roller 12, the floor area of the battery cell preheating device can be reduced, and costs can be saved;

[0051] 2. The cylindrical air duct is beneficial to the uniform distribution of hot air flow, reduces the air resistance, and increases the heat exchange efficiency;

[0052] 3. The cylindrical air duct makes the temperature uniformity better, and the temperature detection and control are more convenient.

[0053] Furthermore, in the axial direction of the housing 11, at least one end of the housing 11 is of an open structure, so that the roller 12 can be pulled out relative to the housing 11, thus facilitating the maintenance of the roller 12.

[0054] Of course, in some embodiments not shown, the cross-section of the housing 11 can also be set as a square structure.

[0055] As Figure 1 、 Figure 4 and Figure 5 shown, in the technical solution of this embodiment, the preheating furnace 10 is of a horizontal structure. The roller 12 includes a cylinder body 121. Through holes 122 are arranged on the cylinder wall of the cylinder body 121. The battery cell placement rack 30 is arranged on the outer side wall of the cylinder body 121, and the heating structure 13 is arranged inside the cylinder body 121.

[0056] Specifically, the above-mentioned "horizontal structure" means that the central axis of the preheating furnace 10 is horizontally arranged (that is, Figure 1 the method described in

[0057] In some other embodiments, the heating structure 13 may also be disposed on the inner wall of the housing 11. In this embodiment, the cylinder 121 does not need to be a hollow structure, and the cylinder 121 does not need to be provided with air holes 122. This embodiment can reduce the size of the drum 12 and simplify its processing technology.

[0058] like Figures 1 to 3 As shown, in the technical solution of this embodiment, the feed port 20 includes a feed port 21 and a discharge port 22 arranged at intervals. The battery cell preheating device also includes a loading mechanism 40 and a unloading mechanism 50. Among them, the loading mechanism 40 is arranged on one side of the preheating furnace 10 and corresponds to the feed port 21, and the loading mechanism 40 is suitable for placing the battery cell 1 from the feed port 21 on the battery cell placement rack 30. The unloading mechanism 50 is arranged on the other side of the preheating furnace 10 and corresponds to the discharge port 22, and the unloading mechanism 50 is suitable for taking the battery cell 1 out of the discharge port 22.

[0059] Specifically, the feed port 21 and the discharge port 22 are arranged relative to the central axis of the housing 11, and the connecting line of the feed port 21 and the discharge port 22 is horizontal. The loading mechanism 40 and the unloading mechanism 50 are respectively arranged on both sides of the preheating furnace 10. The loading mechanism 40 can grab the battery cell 1 from the conveyor line, and then feed the battery cell 1 into the housing 11 from the feed port 21 and place it on the battery cell placement rack 30. After the preheating is completed, the unloading mechanism 50 can take the battery cell 1 out of the battery cell placement rack 30 and unload it from the discharge port 22.

[0060] Furthermore, since the roller 12 rotates in the circumferential direction, in order to prevent the battery cell 1 from falling off the battery cell placement rack 30, in this embodiment, after the battery cell 1 is placed on the battery cell placement rack 30, the roller 12 rotates upward by 180° and the battery cell 1 moves to the discharge port 22, and the battery cell 1 can be unloaded by the unloading mechanism 50. That is, after the battery cell 1 is loaded, it moves half a circle in the housing 11 to be unloaded.

[0061] Of course, in some embodiments not shown, if a fixing mechanism is provided on the battery cell placement rack 30 so that the battery cell 1 can be fixed on the battery cell placement rack 30 , the battery cell 1 can also travel multiple circles in the shell 11 .

[0062] like Figure 4 and Figure 5 As shown, in the technical solution of this embodiment, the battery cell placement rack 30 includes a plurality of support rods 31, and the plurality of support rods 31 form a horizontal and vertical staggered structure on the cylinder 121. Specifically, the support rods 31 are plated rods. Further, the above-mentioned "horizontal and vertical staggered structure" means that the plurality of support rods 31 form multiple rows and columns. Figure 5 Those skilled in the art will appreciate that one battery cell 1 may be supported by at least two support rods 31 .

[0063] As Figure 6 and Figure 7 shown, in the technical solution of this embodiment, the cylinder body 121 includes a plurality of annular plates 1211 and a plurality of connecting plates 1212. Among them, the plurality of annular plates 1211 are arranged at intervals along the axial direction of the cylinder body 121. The plurality of connecting plates 1212 extend along the axial direction of the cylinder body 121, and the connecting plates 1212 are connected to all of the plurality of annular plates 1211. The plurality of annular plates 1211 are arranged at intervals along the circumferential direction of the cylinder body 121, and a plurality of support rods 31 are arranged at intervals on each connecting plate 1212.

[0064] Specifically, the annular plate 1211 has a circular ring structure, and the connecting plate 1212 has a linear structure. The plurality of annular plates 1211 and the plurality of connecting plates 1212 are arranged alternately to form the cylindrical cylinder body 121. Further, a square through-hole is formed between two adjacent annular plates 1211 and between two adjacent connecting plates 1212, that is, the above-mentioned air through-hole 122 is formed.

[0065] Further, the annular plate 1211 and the connecting plate 1212 can be connected by welding or by fasteners.

[0066] Further, in combination Figure 7 it can be seen that a plurality of support rods 31 are arranged on the outer side of each connecting plate 1212, and the plurality of support rods 31 are arranged at intervals along the extending direction of the connecting plate 1212. The support rod 31 and the connecting plate 1212 can be integrally formed, or the former can be connected to the latter by welding, fasteners, etc.

[0067] Preferably, a protective member (such as plastic foam) is further arranged on the outer side of the connecting plate 1212, and the protective member can prevent the battery cell 1 from being knocked and damaged.

[0068] As Figure 8 shown, in the technical solution of this embodiment, the heating structure 13 includes a blower 131, a heater 132, and a filter 133. Among them, the filter 133 is arranged at the air inlet of the blower 131, and the heater 132 is arranged at the air outlet of the blower 131.

[0069] Specifically, the blower 131 is an axial flow blower (or other types of blowers), and the air inlet and outlet directions of the blower 131 are in the radial direction of the drum 12. When the blower 131 works, the air flow is first filtered by the filter 133, then enters the air inlet of the blower 131 and is sent out from the air outlet. After the outgoing air is heated by the heater 132, it flows from the above-mentioned air through-hole 122 to the outside of the drum 12, so as to exchange heat with the battery cell 1. After the hot air flow exchanges heat, the above cycle is carried out again.

[0070] Preferably, the above-mentioned heater 132 can be a fin heat exchanger.

[0071] As Figure 9 shown, since the axial length of the drum 12 is relatively long, in order to ensure that the hot air is evenly distributed in the housing 11, in this embodiment, a plurality of fans 131 are provided, and the plurality of fans 131 are arranged at intervals along the axial direction of the drum 12. And as Figure 11 shown, the installation directions of two adjacent fans 131 can be set in opposite directions, so that a larger number of fans can be arranged in the axial direction.

[0072] As Figure 8 shown, in the technical solution of this embodiment, the heating structure 13 further includes a wind guide cover 134, and a wind channel is formed between the wind guide cover 134 and the inner side wall of the cylinder body 121. Specifically, there are two wind guide covers 134. The inner side of the wind guide cover 134 is a plane, and the outer side is an arc surface. The arc surface is adapted to the inner wall of the drum 12 and encloses a wind channel. The above-mentioned fan 131, heater 132 and filter 133 are arranged between the two wind guide covers 134.

[0073] From Figure 8 it can be seen that the lower ends of the two wind guide covers 134 form an air inlet, and the upper ends form an air outlet. An annular wind channel is enclosed between the outer side of the wind guide cover 134 and the inner wall of the drum 12, so that the hot air flow is more evenly distributed in the drum 12.

[0074] Furthermore, the heating structure 13 may further include a temperature control detection module, which can detect the temperature inside the housing 11 and control the wind speed of the fan 131 and the temperature of the heater 132 according to the real-time temperature, so that the temperature inside the cavity of the preheating furnace 10 reaches a constant temperature state.

[0075] As Figure 12 shown, in the technical solution of this embodiment, both the feeding mechanism 40 and the discharging mechanism 50 include a frame 60 and a plurality of clamping jaws 70. Among them, the clamping jaws 70 are movably arranged on the frame 60, and the plurality of clamping jaws 70 are arranged at intervals along the axial direction of the preheating furnace 10.

[0076] Specifically, the plurality of clamping jaws 70 can simultaneously clamp a plurality of battery cells 1 and make the plurality of battery cells 1 arranged horizontally at intervals. The plurality of clamping jaws 70 can be moved in various directions through a linear module, so as to realize operations such as taking or placing the battery cells 1 from the conveyor line, feeding the battery cells 1 into the feeding port 21 or taking out the battery cells 1 from the discharging port 22.

[0077] As Figures 1 to 3As shown, in the technical solution of this embodiment, the battery cell preheating device further includes a driving mechanism 80, and the driving mechanism 80 is adapted to drive the drum 12 to rotate. Specifically, the driving mechanism 80 can drive the drum 12 to rotate step by step. That is, when the drum 12 rotates to a certain position, it stops, and after stopping for a certain period of time, the drum 12 continues to rotate to the next position, thereby facilitating the feeding mechanism 40 and the discharging mechanism 50 to feed and discharge the battery cells 1.

[0078] As Figure 3 shown, in the technical solution of this embodiment, the driving mechanism 80 includes a ratchet wheel 81, a pawl 83, and a driving cylinder 82. Among them, the ratchet wheel 81 is arranged on the outer side wall of the drum 12. The driving cylinder 82 is arranged in the housing 11. The pawl 83 is connected to the push rod of the driving cylinder 82, and the pawl 83 is adapted to cooperate with the ratchet wheel 81.

[0079] Specifically, the driving cylinder 82 can reciprocally push the pawl 83 to cooperate with the ratchet wheel 81, thereby realizing the step-by-step rotation of the drum 12. Of course, the driving mechanism 80 can also be selected as other common power mechanisms, such as a stepping motor.

[0080] Preferably, the driving cylinder 82 is a cylinder, and the cylinder uses compressed gas as the power source, which can reduce the overall power consumption of the battery cell preheating device.

[0081] This embodiment also provides a battery production line, including the above-mentioned battery cell preheating device.

[0082] Embodiment Two

[0083] As Figure 13 and Figure 14 shown, compared with the above-mentioned Embodiment One, the battery cell preheating device of Embodiment Two is different in the forming method of the cylinder body 121. Specifically, the cylinder body 121 is formed by bending a plate and connecting the two ends. The plate is provided with air passing holes 122, the plate is provided with threaded holes, and the support rod 31 is provided with an external threaded section, and the external threaded section is inserted into the threaded holes.

[0084] The cylinder body 121 in this embodiment is formed by processing a whole plate. The support rod 31 is connected to the plate through a threaded structure. And preferably, a protective member (such as plastic foam) is arranged at the bottom of the support rod 31, thereby preventing the battery cell 1 from being knocked and damaged.

[0085] Embodiment Three

[0086] As Figure 15 and Figure 16As shown, compared with the above-mentioned Embodiment 1, the cell preheating device of Embodiment 3 is different in that the preheating furnace 10 is of a vertical structure. And the cell placement rack 30 includes a tray 32, and the tray 32 is rotatably arranged on the roller 12. The cell preheating device further includes a loading and unloading mechanism, which is correspondingly arranged with the material passing port 20, and the loading and unloading mechanism is adapted to place the cell 1 from the material passing port 20 on the tray 32, or to take out the cell 1 from the material passing port 20.

[0087] Specifically, the above-mentioned "vertical structure" means that the axis of the preheating furnace 10 is arranged along the vertical direction (i.e., Figure 15 the position shown in). Since the preheating furnace 10 is of a vertical structure, the tray 32 can rotate horizontally in the preheating furnace 10. At the same time, the tray 32 can rotate around its own axis, so the cell 1 makes two kinds of motions, revolution and rotation, in the preheating furnace 10 at the same time.

[0088] Furthermore, in this embodiment, only one material passing port 20 needs to be provided on the housing 11, and correspondingly, only one loading and unloading mechanism (not shown in the figure) needs to be provided. Specifically, after the loading and unloading mechanism places the cell 1 from the material passing port 20 on the tray 32, the roller 12 rotates in the housing 11 and exchanges heat with the cell 1. After the roller 12 rotates one or more circles in the housing 11, the loading and unloading mechanism takes out the cell from the material passing port 20 and transfers it to the next working station.

[0089] As Figure 16 shown, there are multiple trays 32 in this embodiment, and the multiple trays 32 are arranged at intervals along the circumferential direction of the roller 12.

[0090] As Figure 15 shown, in the technical solution of this embodiment, the tray 32 is multi-layered. Further, each layer includes multiple trays 32. The above-mentioned loading and unloading mechanism can perform cell 1 loading or cell 1 unloading operations on each layer separately.

[0091] The other structures of the cell preheating device in Embodiment 3 are the same as those in the above-mentioned Embodiment 1 and will not be elaborated here.

[0092] Obviously, the above embodiments are only examples for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made on the basis of the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A preheating device for an electric core, characterized in that, Comprising: A preheating furnace (10), the preheating furnace (10) includes a housing (11), a drum (12) and a heating structure (13). The drum (12) is rotatably arranged inside the housing (11). A material passing opening (20) is arranged on the side wall of the housing (11), and the material passing opening (20) extends along the axial direction of the preheating furnace (10). A battery cell placement rack (30) is arranged on the side wall of the drum (12), and the heating structure (13) is adapted to heat the space inside the housing (11). The drum (12) includes a cylinder body (121). Air passing holes (122) are arranged on the wall of the cylinder body (121). The battery cell placement rack (30) is arranged on the outer side wall of the cylinder body (121), and the heating structure (13) is arranged inside the cylinder body (121). The heating structure (13) includes a blower (131), a heater (132) and a filter (133). Among them, the filter (133) is arranged at the air inlet of the blower (131), the heater (132) is arranged at the air outlet of the blower (131), there are multiple blowers (131), and the multiple blowers (131) are arranged at intervals along the axial direction of the drum (12). The heating structure (13) further includes a wind guiding cover (134). A wind channel is formed between the wind guiding cover (134) and the inner side wall of the cylinder body (121). The air inlet and outlet direction of the blower (131) is the radial direction of the drum (12). After the air outlet is heated by the heater (132), it flows from the air passing holes (122) to the outside of the drum (12), so as to exchange heat with the battery cell (1). There are two wind guiding covers (134). The inner side of the wind guiding cover (134) is a plane, and the outer side is an arc surface. The arc surface is adapted to the inner wall of the drum (12) and encloses a wind channel. The blower (131), the heater (132) and the filter (133) are arranged between the two wind guiding covers (134). The lower ends of the two wind guiding covers (134) form an air inlet, and the upper ends form an air outlet. An annular wind channel is enclosed between the outer side of the wind guiding cover (134) and the inner wall of the drum (12).

2. The preheating device for an electric core according to claim 1, characterized in that, The preheating furnace (10) is of a horizontal structure.

3. The preheating device for an electric core according to claim 2, characterized in that, The material passing opening (20) includes a feed inlet (21) and a discharge outlet (22) arranged at intervals. The battery cell preheating device further includes: A feeding mechanism (40), arranged on one side of the preheating furnace (10) and corresponding to the feed inlet (21). The feeding mechanism (40) is adapted to place the battery cell (1) from the feed inlet (21) on the battery cell placement rack (30). A discharging mechanism (50), arranged on the other side of the preheating furnace (10) and corresponding to the discharge outlet (22). The discharging mechanism (50) is adapted to take out the battery cell (1) from the discharge outlet (22).

4. The preheating device for an electric core according to claim 2, characterized in that, The battery cell placement rack (30) includes a plurality of support rods (31), and the plurality of support rods (31) form a horizontal and vertical crisscross structure on the cylinder body (121).

5. The preheating device for an electric core according to claim 4, characterized in that, The cylinder body (121) includes: A plurality of annular plates (1211), and the plurality of annular plates (1211) are arranged at intervals along the axial direction of the cylinder body (121); A plurality of connecting plates (1212), the connecting plates (1212) extend along the axial direction of the cylinder body (121), and the connecting plates (1212) are connected to all of the plurality of annular plates (1211). The plurality of annular plates (1211) are arranged at intervals along the circumferential direction of the cylinder body (121). A plurality of the support rods (31) are arranged at intervals on each of the connecting plates (1212).

6. The preheating device for an electric core according to claim 4, characterized in that, The cylinder body (121) is formed by bending a sheet material and connecting the two ends. The through holes (122) are provided on the sheet material, threaded holes are provided on the sheet material, and an external thread section is provided on the support rod (31), and the external thread section is inserted into the threaded hole.

7. The preheating device for an electric core according to claim 3, characterized in that, Both the loading mechanism (40) and the unloading mechanism (50) include: A frame (60); A plurality of clamping jaws (70), movably arranged on the frame (60), and the plurality of clamping jaws (70) are arranged at intervals along the axial direction of the preheating furnace (10).

8. The preheating device for an electric core according to any one of claims 2 to 6, characterized in that, The battery cell preheating device further includes a driving mechanism (80), and the driving mechanism (80) is adapted to drive the drum (12) to rotate.

9. The preheating device for an electric core according to claim 8, characterized in that, The driving mechanism (80) includes: A ratchet wheel (81): arranged on the outer side wall of the drum (12); A driving cylinder (82), arranged in the housing (11); A ratchet pawl (83), connected to the push rod of the driving cylinder (82), and the ratchet pawl (83) is adapted to cooperate with the ratchet wheel (81).

10. The preheating device for an electric core according to claim 1, characterized in that, The preheating furnace (10) is of a vertical structure. The battery cell placement rack (30) includes a tray (32), and the tray (32) is rotatably arranged on the drum (12). The battery cell preheating device further includes a loading and unloading mechanism, and the loading and unloading mechanism is arranged corresponding to the material passing port (20). The loading and unloading mechanism is adapted to place the battery cell (1) from the material passing port (20) onto the tray (32), or is adapted to take out the battery cell (1) from the material passing port (20).

11. The preheating device for an electric core according to claim 10, characterized in that, There are a plurality of the trays (32), and the plurality of trays (32) are arranged at intervals along the circumferential direction of the drum (12).

12. The preheating device for the battery cell according to claim 10 or 11, characterized in that, The tray (32) is multi-layered.

13. A battery production line, characterized in that, Including the battery cell preheating device according to any one of claims 1 to 12.

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