Hot pressing device and battery production equipment

Abstract

The present invention relates to the technical field of battery production, and discloses a hot pressing device and battery production equipment. The hot pressing device includes a tray, a hot pressing assembly, a first driving assembly and a frame; wherein the tray has a receiving cavity, a heating core is arranged in the receiving cavity, and the heating core is used to preheat the battery cell; the hot pressing assembly and the first driving assembly are arranged on the frame, and the hot pressing assembly and the first driving assembly are connected; the first driving assembly is used to drive the hot pressing assembly to move in the vertical direction; the frame has a receiving space for receiving the tray; before hot pressing, the tray is used to move into the receiving space so that the tray is located at the bottom of the hot pressing assembly; during the hot pressing process, the hot pressing assembly is used to press against the surface of the battery cell under the drive of the first driving assembly; after the hot pressing is completed, the tray is used to move out of the receiving space. In the hot pressing process, the above-mentioned hot pressing device does not need to use a clamp to repeatedly clamp the battery cell, thereby avoiding the clamp damaging the battery cell and improving the product yield of the battery cell.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a hot pressing device and battery production equipment. Background Art

[0002] The production process of batteries involves multiple process steps to ensure the performance, safety and reliability of the battery, including assembling the positive and negative electrodes into a battery cell by winding or stacking, and then putting the battery cell into a hot press to heat the battery cell and apply appropriate pressure to the battery cell to make it more compact.

[0003] In one prior art, the hot pressing device includes an upper pressing plate and a lower pressing plate. Before the hot pressing of the battery cell, the battery cell is usually taken out from the tray by a clamp and placed on the lower pressing plate, and then the upper pressing plate is moved downward to press the battery cell. After the hot pressing is completed, the battery cell is clamped by a clamp and placed back on the tray. Then, the tray will carry the battery cell to the next production station.

[0004] In the above production process, the clamps repeatedly clamp the battery cells, which can easily damage the battery cells, thereby resulting in poor performance of the produced batteries. Summary of the invention

[0005] The present application provides a hot pressing device and a battery production equipment, which are used to solve the problem in the prior art that in the hot pressing process, the clamps are prone to damage the battery cells during repeated clamping of the battery cells, resulting in poor performance of the produced batteries.

[0006] In a first aspect, the present application provides a hot pressing device, which is used to hot press a battery cell. The hot pressing device includes a tray, a hot pressing assembly, a first driving assembly and a frame; wherein:

[0007] The tray is used to carry the battery core; the tray has a receiving cavity, a heating core is arranged in the receiving cavity, and the heating core is used to preheat the battery core;

[0008] The hot pressing assembly and the first driving assembly are arranged on the frame, and the hot pressing assembly and the first driving assembly are connected; the first driving assembly is used to drive the hot pressing assembly to move along the vertical direction Z;

[0009] The frame has a storage space for accommodating the tray; before hot pressing, the tray is used to move into the storage space so that the tray is located at the bottom of the hot pressing assembly; during the hot pressing process, the hot pressing assembly is used to press against the surface of the battery cell under the drive of the first driving assembly; after the hot pressing is completed, the tray is used to move out of the storage space.

[0010] The beneficial effects of the hot pressing device provided by the present application are as follows:

[0011] Before the hot pressing device performs hot pressing on the battery cell, the tray and the battery cell enter the accommodation space in the frame as a whole and reach the bottom of the hot pressing assembly; during the hot pressing process, the hot pressing assembly is pressed against the surface of the battery cell under the drive of the first driving assembly; after the hot pressing is completed, the hot pressing assembly is driven away from the battery cell by the first driving assembly, and the tray is moved out of the accommodation space. The hot pressing process eliminates the operation of using a clamp to clamp the battery cell from the tray and place it under the hot pressing assembly, and also eliminates the operation of using a clamp to put the hot pressed battery cell back into the tray, thereby reducing the risk of the battery cell being damaged by the clamp and improving the yield rate of the produced battery. In addition, a heating core is provided in the tray. Before the tray and the battery cell enter the frame, the heating core can preheat the battery cell, so that the temperature of the battery cell increases, thereby saving the hot pressing time of the hot pressing assembly, and also making the battery cell more evenly heated, improving the hot pressing effect.

[0012] In a second aspect, the present application further provides a battery production device, which includes a transfer device and the hot pressing device described in any one of the above technical solutions, wherein the transfer device is used to move the tray into the accommodation space, or to move the tray out of the accommodation space.

[0013] The beneficial effects of the battery production equipment provided by this application are as follows:

[0014] When the battery production equipment is processing the battery cells, the transfer mechanism can transfer the pallet and the battery cells to the position corresponding to the production line and the process equipment, so that the pallet can flow between different process equipment. For example, the transfer device can transfer the pallet to the storage space of the rack in the hot pressing device, so that the pallet and the battery cells are located below the hot pressing assembly, so that the hot pressing assembly can perform hot pressing on the battery cells. After the hot pressing is completed, the transfer device can also move the pallet and the battery cells out of the above storage space and transfer the pallet and the battery cells to the position corresponding to the next process equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a hot pressing device provided in an embodiment of the present application;

[0016] Figure 2 A schematic diagram of the internal structure of a tray provided in an embodiment of the present application;

[0017] Figure 3 for Figure 2 A schematic diagram of a partial structure of the tray shown;

[0018] Figure 4 A top view of a tray and a battery cell provided in an embodiment of the present application;

[0019] Figure 5A schematic diagram of an assembly of a tray and a cover provided in an embodiment of the present application;

[0020] Figure 6 Another schematic diagram of the structure of the hot pressing device provided in the embodiment of the present application;

[0021] Figure 7 A schematic diagram of the structure of a battery production device provided in an embodiment of the present application;

[0022] Figure 8 Another structural schematic diagram of a battery production device provided in an embodiment of the present application;

[0023] Fig. 9 A schematic diagram of the structure of a transfer mechanism provided in an embodiment of the present application;

[0024] Fig.10 A schematic diagram of an assembly of a transfer mechanism and a pallet provided in an embodiment of the present application;

[0025] Fig.11 A schematic diagram of a state of the pressing plate provided in an embodiment of the present application in a first state;

[0026] Fig.12 A schematic diagram of a state of the pressure plate provided in an embodiment of the present application in the second state.

[0027] Reference numerals:

[0028] 10-hot pressing device; 11-hot pressing assembly;

[0029] 12-first driving assembly; 13-frame;

[0030] C1-accommodation space; 14-tray;

[0031] C2-accommodating chamber; 141-first wall portion;

[0032] 142- second wall portion; 1421- heat insulation layer;

[0033] 1421a-first thermal insulation layer; 1421b-second thermal insulation layer;

[0034] 1422- bottom wall; 1423- side wall;

[0035] 143-bearing surface; 15-heating core;

[0036] 16- boss; 20- battery cell;

[0037] 30-cover plate; 40a-positioning protrusion;

[0038] 40b-positioning hole; 50-transfer device;

[0039] 51-support seat; 511-support surface;

[0040] 52-second drive assembly; 53-third drive assembly;

[0041] 60-track; 70-first detection device;

[0042] 80-control device; 90a-first limiting protrusion;

[0043] 90b-second limiting protrusion; 90c-third limiting protrusion;

[0044] 90d- fourth limiting protrusion; 100- pressing plate;

[0045] 110-Fourth drive assembly. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the example embodiments of the present application to clearly and completely describe the technical solutions in the example embodiments of the present application. The example embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present application. Therefore, it should be understood that various modifications and changes can be made to the example embodiments without departing from the scope of protection of the present application.

[0047] In the description of the present application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.

[0048] Unless otherwise specified or explained, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] Further, in the description of the present application, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present application are described from the perspectives shown in the accompanying drawings and should not be understood as limiting the exemplary embodiments of the present application. It should also be understood that in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", "inner", "outer", but also can be indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.

[0050] Figure 1 This is a schematic diagram of the structure of a hot pressing device provided in an embodiment of the present application, and the hot pressing device is used to hot press a battery cell. Figure 1 As shown, in one embodiment, the hot pressing device 10 includes a hot pressing assembly 11, a first driving assembly 12 and a frame 13. The hot pressing assembly 11 and the first driving assembly 12 are arranged on the frame 13, and the hot pressing assembly 11 and the first driving assembly 12 are connected, and the hot pressing assembly 11 can reciprocate along the vertical direction Z under the drive of the first driving assembly 12.

[0051] The hot pressing device 10 also includes a tray 14, which is used to carry the battery cell 20. The frame 13 has a storage space C1 for accommodating the tray 14, and the storage space C1 is located below the hot pressing assembly 11, and the tray 14 can freely enter and exit the storage space C1. When the tray 14 is located in the above-mentioned storage space C1, the hot pressing assembly 11 is located above the tray 14 and the battery cell 20, and the orthographic projection of the hot pressing assembly 11 on the surface of the tray 14 can completely cover the orthographic projection of the battery cell 20 on the surface of the tray 14. Driven by the first driving assembly 12, the hot pressing assembly 11 can move downward along the vertical direction Z until it presses against the surface of the battery cell 20; and the hot pressing assembly 11 can also move upward along the vertical direction Z and away from the battery cell 20.

[0052] When the hot pressing assembly 11 is specifically set, the hot pressing assembly 11 includes a hot pressing plate and a heating module, and the heating module is used to heat the hot pressing plate. When the tray 14 is located in the accommodating space C1 in the frame 13, the hot pressing plate can be pressed against the surface of the battery cell 20 under the drive of the first driving assembly 12, and apply a certain pressure to the battery cell 20. At the same time, the hot pressing plate can also conduct the heat generated by the heating module to the battery cell 20, so that the temperature of the battery cell 20 increases. Under the combined effect of pressure and temperature, the positive electrode sheet, the negative electrode sheet and the diaphragm in the battery cell 20 are more closely combined, thereby reducing the internal resistance of the battery cell 20 and improving the energy density of the battery cell 20.

[0053] Before the hot pressing assembly 11 performs hot pressing on the battery cell 20, the tray 14 and the battery cell 20 are moved into the accommodation space C1 in the frame 13. At this time, the tray 14 and the battery cell 20 are located together under the hot pressing assembly 11, so there is no need to use a clamp to clamp the battery cell 20 from the tray 14 and place the battery cell 20 separately under the hot pressing assembly 11. During the hot pressing process, the hot pressing assembly 11 is driven by the first driving assembly 12 to press against the surface of the battery cell 20, and the tray 14 supports the battery cell 20 under the battery cell 20, and the tray 14 can withstand the pressure applied by the hot pressing assembly 11. After the hot pressing is completed, the hot pressing assembly 11 is driven by the first driving assembly 12 to move away from the tray 14 and the battery cell 20, and the tray 14 and the battery cell 20 are moved out of the frame 13 and can be moved to a position corresponding to other process equipment, so that the battery cell 20 can continue to be processed by other process equipment.

[0054] Therefore, during the process of hot pressing the battery cell 20 by the hot pressing device 10 provided in the embodiment of the present application, the tray 14 and the battery cell 20 move as a whole, eliminating the operation of using the clamp to clamp the battery cell 20 from the tray 14 and place it under the hot pressing assembly 11, and also eliminating the operation of using the clamp to put the hot pressed battery cell 20 back to the tray 14, thereby reducing the risk of the battery cell 20 being damaged by the clamp and improving the yield rate of the produced batteries.

[0055] In addition to carrying the battery cells 20 , the tray 14 can also preheat the battery cells 20 . Figure 2 A schematic diagram of the internal structure of a tray provided in an embodiment of the present application, such as Figure 2 As shown, in one embodiment, the tray 14 has a receiving cavity C2 , and a heating core 15 is disposed in the receiving cavity C2 . The heating core 15 is used to preheat the battery cell 20 .

[0056] In specific applications, the heating core 15 can preheat the battery cell 20 before the tray 14 and the battery cell 20 enter the rack 13, so that the temperature of the battery cell 20 is initially increased. After the tray 14 and the battery cell 20 enter the rack 13, the heating core 15 can continue to heat the battery cell 20. In addition, the hot pressing component 11 can press against the surface of the battery cell 20 on the side away from the tray 14, and also heat the battery cell 20, so that the temperature of the battery cell 20 is further increased. Since the temperature of the battery cell 20 has been initially increased before being hot-pressed by the hot pressing component 11, the time for the hot pressing component 11 to hot-press the battery cell 20 can be shortened, thereby improving production efficiency. In addition, the heating core 15 and the hot pressing component 11 can heat the battery cell 20 from the opposite sides of the battery cell 20, so that the temperature of the battery cell 20 is relatively uniform, thereby improving the hot pressing effect.

[0057] When the heating core 15 is specifically provided, the heating core 15 may be a resistance wire. The resistance wire can convert electrical energy into thermal energy when powered on, thereby heating the tray 14, so that the temperature of the tray 14 increases; the tray 14 then conducts the heat to the battery cell 20, so that the temperature of the battery cell 20 increases. In addition to the resistance wire, the heating core 15 may also be an electromagnetic heating coil, which can generate an alternating magnetic field when powered on, and the tray 14 induces eddy currents in the alternating magnetic field and converts them into heat. The tray 14 then conducts the heat to the battery cell 20, so that the temperature of the battery cell 20 increases.

[0058] The heating core 15 has a power-on state and a power-off state. In specific applications, before the tray 14 enters the rack 13, the heating core 15 can be switched from the power-off state to the power-on state, so as to preheat the battery cell 20 and initially increase the temperature of the battery cell 20. After the tray 14 enters the rack 13, the heating core 15 can continue to heat the battery cell 20. After the battery cell 20 completes hot pressing, the heating core 15 can be switched from the power-on state back to the power-off state. Alternatively, the heating core 15 can also be switched from the power-on state back to the power-off state during the hot pressing process when the temperature of the battery cell 20 reaches a threshold.

[0059] When the above embodiment is implemented, the heating core 15 is connected to a power source through a circuit. The power source can be located inside the accommodating cavity C2 or outside the accommodating cavity C2. The power-on state and the power-off state of the heating core 15 can be switched manually or automatically when a preset condition is met.

[0060] When the heating core 15 is specifically arranged, in one embodiment, the distance from the heating core 15 to the top surface of the accommodating cavity C2 is smaller than the distance from the heating core 15 to the bottom surface of the accommodating cavity C2. The top surface of the accommodating cavity C2 is close to the side surface of the tray 14 carrying the battery cell 20, and the bottom surface of the accommodating cavity C2 is away from the side surface of the tray 14 carrying the battery cell 20. In the above embodiment, the distance between the heating core 15 and the battery cell 20 along the vertical direction Z is relatively close. When the heating core 15 is in the power-on state, the heat generated by the heating core 15 can be quickly transferred to the battery cell 20, thereby improving the heat transfer efficiency.

[0061] In a specific embodiment, the distance from the heating core 15 to the top surface of the accommodating cavity C2 is less than or equal to 35 mm. Optionally, the above distance can be 0 mm, 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm or other values. When the above distance is 0 mm, the heating core 15 is in contact with the top surface of the accommodating cavity C2. In a specific implementation, the heating core 15 can be bonded to the top surface of the accommodating cavity C2 by a thermally conductive adhesive. Alternatively, the top surface of the accommodating cavity C2 is provided with a groove, and the heating core 15 is stuck in the groove and in contact with the inner wall of the groove.

[0062] When the tray 14 is specifically set, in one embodiment, the tray 14 has a first wall portion 141 and a second wall portion 142, and the first wall portion 141 and the second wall portion 142 enclose a receiving cavity C2. Among them, the first wall portion 141 is used to carry the battery cell 20, and the thermal conductivity of the first wall portion 141 is greater than the thermal conductivity of the second wall portion 142, and the first wall portion 141 can conduct the heat generated by the heating core 15 to the battery cell 20. The second wall portion 142 has a heat insulation layer 1421, and the heat insulation layer 1421 can reduce the heat generated by the heating core 15 from being conducted to the external environment, thereby improving the heating effect. In addition, the heat insulation layer 1421 has the characteristic of high temperature resistance.

[0063] When the tray 14 is specifically prepared, the first wall 141 can be made of metal material, so that the first wall 141 has good thermal conductivity. The second wall 142 can be made of a metal material substrate, and then a heat insulating material is coated on the surface of the substrate to form a heat insulating layer 1421. Alternatively, the second wall 142 can also be made entirely of a non-metallic material that is resistant to high temperatures and has good heat insulating properties.

[0064] Figure 3 for Figure 2 The partial structural diagram of the tray shown is as follows: Figure 3 As shown, in one embodiment, the second wall portion 142 includes a bottom wall 1422 and a side wall 1423, the bottom wall 1422 and the first wall portion 141 are arranged opposite to each other, and the side wall 1423 is arranged in a ring shape between the bottom wall 1422 and the first wall portion 141. Correspondingly, the heat insulation layer 1421 includes a first heat insulation layer 1421a and a second heat insulation layer 1421b, the first heat insulation layer 1421a is located at the bottom wall 1422, and the second heat insulation layer 1421b is located at the side wall 1423. The first heat insulation layer 1421a is used to reduce the heat dissipation of the bottom wall 1422 to the outside, and the second heat insulation layer 1421b is used to reduce the heat dissipation of the side wall 1423 to the outside. In the process of transporting the tray 14 and the process of hot pressing the battery cell 20, the bottom wall 1422 will contact with other components, thereby transferring heat to other components. Therefore, in order to improve the insulation effect of the first insulation layer 1421a and reduce heat conduction between the bottom wall 1422 and other components, when specifically setting the first insulation layer 1421a, the thickness of the first insulation layer 1421a can be greater than or equal to the thickness of the second insulation layer 1421b.

[0065] In a specific embodiment, the thickness of the first heat insulation layer 1421a is d 1 , the thickness of the second thermal insulation layer 1421b is d 2 , d 1 and d 2 The following relations are satisfied: Optional, d 1 and d 2The difference can be 28mm, 30mm, 32mm, 34mm or other values ​​that meet the above range, which are not listed one by one in this application. 1 and d 2 When the difference satisfies the above range, the heat insulation effect of the bottom wall 1422 can be better than the heat insulation effect of the side wall 1423, and the temperature difference between the bottom wall 1422 and the side wall 1423 can be reduced, so that the temperature of the tray 14 is more uniform.

[0066] The thermal insulation material in the first thermal insulation layer 1421a and the thermal insulation material in the second thermal insulation layer 1421b can be the same or different. As an example, the first thermal insulation layer 1421a and the second thermal insulation layer 1421b use different thermal insulation materials, and the thermal insulation performance of the thermal insulation material in the first thermal insulation layer 1421a is better than the thermal insulation performance of the thermal insulation material in the second thermal insulation layer 1421b.

[0067] In one embodiment, the first thermal insulation layer 1421a is located on a side surface of the bottom wall 1422 away from the first wall portion 141, and the compressive strength of the first thermal insulation layer 1421a is greater than or equal to the compressive strength of the second thermal insulation layer 1421b. This is because, during the hot pressing of the battery cell 20, the first thermal insulation layer 1421a will contact with other components and produce extrusion between the other components. Therefore, when the first thermal insulation layer 1421a and the second thermal insulation layer 1421b are specifically set, the compressive strength of the first thermal insulation layer 1421a can be made greater than the compressive strength of the second thermal insulation layer 1421b, thereby reducing the damage to the first thermal insulation layer 1421a under extrusion.

[0068] In a specific embodiment, the compressive strength of the first heat insulation layer 1421a is σ, and σ satisfies the following relationship: 100 N / m 2 ≤σ≤600N / m 2 , optional, the value of σ is 200N / m 2 、300N / m 2 、 / 400 N / m 2 , 500 N / m 2 Or other values ​​that meet the above range, which are not listed one by one in this application.

[0069] The shape of the tray 14 includes many options, for example, the tray 14 can be round, it can also be rectangular, or the tray 14 can also be a special shape, which will not be listed one by one in this application. Figure 2 As shown, in one embodiment, the tray 14 has a carrying surface 143, and the carrying surface 143 is located on a side of the tray 14 facing the battery cell 20. During the transportation process, the battery cell 20 is placed on the carrying surface 143 of the tray 14.

[0070] Figure 4A top view of a tray and a battery cell provided in an embodiment of the present application, such as Figure 4 As shown, in one embodiment, the orthographic projection of the battery cell 20 on the plane where the carrying surface 143 is located is completely located within the carrying surface 143. That is, after the battery cell 20 is placed on the tray 14, the edge of the battery cell 20 will not exceed the tray 14, thereby reducing the risk of the battery cell 20 being bumped during transportation.

[0071] Please continue to refer to Figure 4 In one embodiment, the tray 14 is a rectangular structure, and in the plane where the bearing surface 143 is located, the tray 14 has a length dimension L 1 and width dimension W 1 , and L 1 >W 1 The battery cell 20 has a length dimension L 2 and width dimension W 2 , and L 2 >W 2 Among them, L 1 and L 2 is the dimension of the tray 14 and the battery cell 20 along the same direction, W 1 and W 2 is the dimension of the tray 14 and the battery cell 20 along another same direction, and 1.1L 2 ≤L 1 ≤1.4L 2 , W 2 ≤W 1 ≤1.1W 2 Optional, L 1 The value can be 1.15L 2 , 1.2L 2 , 1.25L 2 , 1.3L 2 , 1.35L 2 Or other values ​​satisfying the above range. 1 The value can be 1.02W 2 , 1.04W 2 , 1.08W 2 Or other values ​​that meet the above range. 1 and L 2 , W 1 and W 2 When the above relationships are satisfied respectively, the orthographic projection of the battery cell 20 on the plane where the carrying surface 143 is located can be completely located within the carrying surface 143, and the size of the tray 14 can be avoided to be too large, thereby reducing the space occupied by the tray 14 and providing convenience for the transportation of the tray 14.

[0072] Figure 5A schematic diagram of an assembly of a tray, a cover plate, and a battery cell provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, in one embodiment, in addition to the battery cell 20, a cover plate 30 is placed on the surface of the tray 14, and the cover plate 30 is located between the tray 14 and the battery cell 20. In a processing step after hot pressing, the cover plate 30 can be welded to another structural plate to form a battery shell. In the production process of the battery, in order to reduce the displacement between the cover plate 30 and the tray 14, one of the tray 14 and the cover plate 30 is provided with a positioning protrusion 40a, and the other is provided with a positioning hole 40b, and the positioning protrusion 40a is accommodated in the positioning hole 40b. The cooperation of the positioning protrusion 40a and the positioning hole 40b fixes the position of the cover plate 30 on the surface of the tray 14, thereby reducing the displacement between the cover plate 30 and the inside of the tray 14.

[0073] The number of the positioning protrusion 40a and the positioning hole 40b can be one or more. In the case where there are multiple positioning protrusions 40a and positioning holes 40b, the positioning protrusions 40a and positioning holes 40b can be arranged circumferentially. For the cover plate 30, the positioning protrusion 40a or the positioning hole 40b provided on the cover plate 30 is close to the edge of the cover plate 30. On the production line, after the cover plate 30 and another part of the structural plate are welded to form a battery housing, the edge portion of the cover plate 30 provided with the positioning protrusion 40a or the positioning hole 40b can be cut by a cutting process.

[0074] Please continue to refer to Figure 5 In one embodiment, a plurality of positioning protrusions 40a are provided on one side of the tray 14 facing the cover plate 30, and the plurality of positioning protrusions 40a are arranged along the circumferential direction. A plurality of positioning holes 40b are provided on one side of the cover plate 30 facing the tray 14, and the plurality of positioning holes 40b are also arranged along the circumferential direction and close to the edge of the cover plate 30. Optionally, the plurality of positioning holes 40b may be blind holes or through holes.

[0075] In addition, a plurality of blocks may be provided on the surface of the tray 14 , and the plurality of blocks are distributed on the outer peripheral side of the cover plate 30 . The plurality of blocks may also play a role in positioning the cover plate 30 , thereby reducing the displacement of the cover plate 30 on the surface of the tray 14 .

[0076] Figure 6 A schematic diagram of the structure of the hot pressing device provided in the embodiment of the present application is shown as follows: Figure 6 As shown, in one embodiment, at least one boss 16 is provided in the accommodation space C1 of the frame 13, and the at least one boss 16 is located below the hot pressing assembly 11 and is used to support the tray 14. During the hot pressing process, the tray 14 is placed on the boss 16, and the boss 16 can withstand the pressure applied downward by the hot pressing assembly 11.

[0077] When the boss 16 is specifically provided, the number of bosses 16 may be one or more. Since the boss 16 will bear the pressure applied downward by the hot pressing assembly 11 during the hot pressing process, the hardness of the boss 16 should be greater than or equal to 32HRC. Optionally, the hardness of the boss 16 may be 34HRC, 36HRC, 38HRC, 40HRC or other values ​​satisfying the above range, which are not listed one by one in this application.

[0078] During the hot pressing process, the boss 16 plays a supporting role under the tray 14. When the surface of the boss 16 used to support the tray 14 is relatively flat, the tilt of the tray 14 can be reduced, so that the battery cell is subjected to a more uniform force under the extrusion of the hot pressing assembly 11. In one embodiment, the flatness of the surface of the boss 16 used to support the tray 14 is less than or equal to 0.03mm. Optionally, the value of the above flatness can be 0, 0.01mm, 0.02mm or other values ​​that meet the above range, which are not listed one by one in this application.

[0079] In addition, relative to the reference plane, the parallelism of the surface of the boss 16 used to support the tray 14 is less than or equal to 0.08 mm. Optionally, the value of parallelism can be 0, 0.02 mm, 0.04 mm, 0.06 mm or other values ​​that meet the above range, which are not listed one by one in this application. The above-mentioned boss 16 can reduce the tilt of the tray 14, so that the battery cell 20 is subjected to a more uniform force under the extrusion of the hot pressing assembly 11.

[0080] Combination Figure 3 In some embodiments, the tray 14 has a bottom wall 1422 and a side wall 1423, wherein the bottom wall 1422 has a first heat insulation layer 1421a, and the side wall 1423 has a second heat insulation layer 1421b. During the hot pressing process, the bottom wall 1422 will contact the above-mentioned boss 16 and transfer heat to the above-mentioned boss 16. In order to reduce the heat in the tray 14 from being transferred to the boss 16, the thickness of the first heat insulation layer 1421a can be greater than the thickness of the second heat insulation layer 1421b, and the heat insulation performance of the heat insulation material in the first heat insulation layer 1421a can also be better than the heat insulation effect of the heat insulation material in the second heat insulation layer 1421b.

[0081] Based on the same technical concept, an embodiment of the present application also provides a battery production device. Figure 7 A schematic diagram of a battery production device provided in an embodiment of the present application, such as Figure 7 As shown, the battery production equipment includes a transfer device 50 and the hot pressing device 10 described in any of the above technical solutions, wherein the transfer device 50 is used to move the tray 14 into the accommodating space C1 of the rack 13, or to move the tray 14 out of the accommodating space C1 of the rack 13.

[0082] When the battery production equipment is processing the battery cell 20, the transfer device 50 can transfer the tray 14 and the battery cell 20 to the position corresponding to the process equipment of the production line, so that the tray 14 can flow between different process equipment. For example, the transfer device 50 can transfer the tray 14 to the storage space C1 of the hot pressing device 10, so that the tray 14 and the battery cell 20 are located below the hot pressing assembly 11, so that the hot pressing assembly 11 can perform hot pressing on the battery cell 20. After the hot pressing is completed, the transfer device 50 can also move the tray 14 and the battery cell 20 out of the above-mentioned storage space C1, and transfer the tray 14 and the battery cell 20 to the position corresponding to the next process equipment.

[0083] In one embodiment, the battery production equipment further includes a track 60, which can be a unidirectional track or a circular track. The hot pressing device 10 is located in the extension path of the track 60, and the track 60 passes through the receiving space C1 of the rack. The transfer device 50 can drive the tray 14 to slide along the track 60 and transfer the tray 14 to the receiving space C1.

[0084] Figure 8 Another structural schematic diagram of the battery production equipment provided in the embodiment of the present application is as follows: Figure 8 As shown, in one embodiment, the battery production equipment further includes a first detection device 70 and a control device 80. The first detection device 70 is used to detect the position of the tray 14. The control device 80 is connected to the first detection device 70, and is used to control the heating core 15 to switch from a power-off state to a power-on state when the first detection device 70 detects that the tray 14 has reached the preset position, so that the heating core 15 heats the battery cell 20. The above-mentioned preset position is located upstream of the hot pressing device 10, or in other words, on the production line, the tray 14 passes through the preset position and the hot pressing device 10 in sequence. When the first detection device 70 detects that the tray 14 has reached the preset position, under the control of the control device 80, the heating core 15 can be automatically switched from a power-off state to a power-on state, thereby preheating the battery cell 20 in the process of the tray 14 moving from the preset position to the hot pressing device 10. On the one hand, the above embodiment realizes the automatic on and off of the heating core 15, thereby improving automation; on the other hand, it ensures that each battery cell 20 will undergo the same preheating time during the process of being transported to the hot pressing device 10, thereby improving the consistency of the hot pressing effect of the battery cell 20.

[0085] When the first detection device 70 is specifically configured, the first detection device 70 may be a photoelectric sensor.

[0086] After heating the battery cell 20 for a period of time, the heating core 15 can also automatically switch from the power-on state to the power-off state under the control of the control device 80, thereby stopping heating the battery cell 20. For example, in one embodiment, the battery production equipment also includes a second detection device (not shown), the second detection device is connected to the control device 80, and the second detection device is also used to detect the position of the tray 14. When the second detection device detects that the tray 14 leaves the hot pressing device 10, the control device 80 can control the heating core 15 to change from the power-on state to the power-off state, so that the heating core 15 stops heating the battery cell 20.

[0087] For another example, in another embodiment, the battery production equipment further includes a third detection device (not shown), which is connected to the control device 80 and is used to detect the temperature of the battery cell 20. When the third detection device detects that the temperature of the battery cell 20 reaches a threshold value, the control device 80 controls the heating core 15 to change from a power-on state to a power-off state, so that the heating core 15 stops heating the battery cell 20.

[0088] When the second detection device and the third detection device are specifically arranged, the second detection device may be a photoelectric sensor, and the third detection device may be a temperature sensor.

[0089] When the transfer device 50 is specifically configured, the transfer device 50 includes a variety of structural forms. Fig. 9 A schematic diagram of the structure of a transfer device provided in an embodiment of the present application, Fig.10 A schematic diagram of an assembly of a transfer device and a pallet provided in an embodiment of the present application, for reference Fig. 9 and Fig.10 In one embodiment, the transfer device 50 includes a support base 51 and a second drive assembly 52 , the support base 51 and the second drive assembly 52 are connected, and the support base 51 is supported on the bottom of the tray 14 .

[0090] Combination Figure 3 In some embodiments, the tray 14 has a bottom wall 1422 and a side wall 1423, wherein the bottom wall 1422 has a first thermal insulation layer 1421a, and the side wall 1423 has a second thermal insulation layer 1421b. During the transportation of the tray 14, the bottom wall 1422 will contact the support seat 51 and transfer heat to the support seat 51. In order to reduce the heat in the tray 14 from being conducted to the support seat 51, the thickness of the first thermal insulation layer 1421a can be greater than the thickness of the second thermal insulation layer 1421b, or the thermal insulation performance of the thermal insulation material in the first thermal insulation layer 1421a can be better than the thermal insulation effect of the thermal insulation material in the second thermal insulation layer 1421b.

[0091] When the transfer device 50 is installed, the support seat 51 and the track 60 are slidably connected, and the second driving assembly 52 can drive the support seat 51 to slide along the track 60. Driven by the second driving assembly 52, the support seat 51 can drive the tray 14 to slide along the track 60 into the accommodation space C1 of the frame 13 and move to the bottom of the hot pressing assembly 11. Of course, other process equipment can also be distributed in the extension path of the track 60, and driven by the second driving assembly 52, the support seat 51 can also drive the tray 14 to slide along the track 60 to a position corresponding to other process equipment.

[0092] In addition to the above-mentioned structural forms, the transfer device 50 may also adopt other structural forms. For example, in one embodiment, the transfer device 50 includes a conveyor belt. During the battery production process, the tray 14 is placed on the conveyor belt and follows the conveyor belt to a position corresponding to the process equipment on the production line. For another example, in another embodiment, the transfer device 50 includes a robotic arm, which has at least one movable joint, and the robotic arm can clamp the tray 14 and transfer the tray 14 to a position corresponding to the process equipment on the production line.

[0093] Please continue to refer to Fig.10 In one embodiment, a first limiting protrusion 90a and a second limiting protrusion 90b are arranged at intervals on a side surface of the support base 51 facing the tray 14, and the tray 14 is located between the first limiting protrusion 90a and the second limiting protrusion 90b. The first limiting protrusion 90a and the second limiting protrusion 90b can reduce the displacement of the tray 14 and the support base 51 along the arrangement direction of the first limiting protrusion 90a and the second limiting protrusion 90b, thereby improving the stability of the tray 14 relative to the support base 51.

[0094] In addition, the side surface of the tray 14 facing the support seat 51 has a third limiting protrusion 90c and a fourth limiting protrusion 90d arranged at intervals, and the support seat 51 is located between the third limiting protrusion 90c and the fourth limiting protrusion 90d. Among them, the arrangement direction of the first limiting protrusion 90a and the second limiting protrusion 90b intersects with the arrangement direction of the third limiting protrusion 90c and the fourth limiting protrusion 90d. The third limiting protrusion 90c and the fourth limiting protrusion 90d can reduce the displacement of the tray 14 and the support seat 51 along the arrangement direction of the third limiting protrusion 90c and the fourth limiting protrusion 90d, thereby improving the stability of the tray 14 relative to the support seat 51.

[0095] In the above embodiment, two pairs of limiting protrusions are provided between the tray 14 and the support seat 51, and the two pairs of limiting protrusions can limit the relative displacement of the tray 14 and the support seat 51 in two different directions, thereby effectively improving the stability of the tray 14 relative to the support seat 51. In other embodiments, only one pair of limiting protrusions may be provided between the tray 14 and the support seat 51.

[0096] In specific applications, when the tray 14 needs to be removed from the surface of the support seat 51, the tray 14 can be moved away from the support seat 51 along the stacking direction of the tray 14 and the support seat 51 until the tray 14 and the support seat 51 are separated. When the tray 14 needs to be placed on the surface of the support seat 51, the tray 14 can be moved closer to the support seat 51 along the stacking direction of the tray 14 and the support seat 51 until the tray 14 is supported on the surface of the support seat 51. In this way, the assembly and disassembly of the tray 14 and the support seat 51 are relatively convenient, and the above operations can be completed manually or by a robot.

[0097] It should be pointed out that in addition to the above-mentioned method to improve the stability of the tray 14 relative to the support seat 51, other methods can also be used. For example, in one embodiment, the tray 14 and the support seat 51 are respectively provided with magnetic components, and the two magnetic components attract each other to combine the tray 14 and the support seat 51, thereby reducing the relative displacement between the tray 14 and the support seat 51 and improving the stability of the tray 14 relative to the support seat 51. For another example, in another embodiment, one of the tray 14 and the support seat 51 is provided with a protrusion, and the other is provided with a groove, and the protrusion is stuck in the groove, thereby reducing the relative displacement between the tray 14 and the support seat 51 and improving the stability of the tray 14 relative to the support seat 51.

[0098] When the transfer device 50 is specifically set, Fig.10 As shown, in one embodiment, the transfer device 50 further includes a third drive assembly 53, which is connected to the support base 51 and is used to drive the support base 51 to rise or fall along the vertical direction Z. Driven by the third drive assembly 53, when the support base 51 rises along the vertical direction Z, the height of the tray 14 increases; when the support base 51 falls along the vertical direction Z, the height of the tray 14 decreases.

[0099] In the above embodiment, the position of the tray 14 along the extension direction of the track 60 is adjustable under the drive of the second drive assembly 52. ​​The height of the tray 14 is adjustable under the drive of the third drive assembly 53. In this way, the transfer device 50 can meet the requirements of different process equipment for the position of the tray 14 in the extension direction of the track 60 and the height of the tray 14, thereby transferring the tray 14 to the corresponding position. Optionally, the second drive assembly 52 and the third drive assembly 53 may include one of a linear motor, a cylinder or a ball screw.

[0100] In some embodiments, the track 60 has a first side and a second side arranged along the first direction X, and at least one boss 16 is provided on the first side and the second side respectively, and the at least one boss 16 is located below the hot pressing assembly 11. After the tray 14 moves to the accommodating space C1 of the rack, the third driving assembly 53 can drive the support seat 51 to descend along the vertical direction Z, so that the tray 14 is supported on the above-mentioned boss 16, and at this time, the support seat 51 and the tray 14 are separated. In a specific implementation, the two ends of the tray 14 along the first direction X are located outside the edge of the support seat 51, so that when the support seat descends, the two ends of the tray along the first direction X can be supported on the boss 16.

[0101] During the hot pressing process, when the hot pressing assembly 11 is pressed against the surface of the battery cell 20, the boss 16 can withstand the downward pressure exerted by the hot pressing assembly 11, thereby protecting the third driving assembly 53 and the support seat from being damaged under the pressure. After the hot pressing is completed, the third driving assembly 53 drives the support seat 51 to rise, so that the tray is separated from the boss 16 and falls back to the surface of the support seat 51. Then, the second driving assembly 52 drives the support seat 51 to slide along the track 60, thereby moving away from the frame and away from the hot pressing device 10.

[0102] In order to reduce the risk of collision between the transfer device 50 and the boss 16, in one embodiment, the minimum spacing between the boss 16 located on the first side of the track 60 and the boss 16 located on the second side of the track 60 along the first direction X is w. 0 The maximum width of the transfer device 50 along the first direction X is D 1 , where D 0 and D 1 Satisfaction: D 0 >D 1 , so that the distance between the bosses 16 located on both sides of the track 60 can accommodate the transfer device 50, thereby reducing the risk of interference between the transfer device 50 and the bosses 16 during movement.

[0103] It is worth noting that the maximum width of the transfer device 50 along the first direction X is D 1 It refers to the maximum value of the width of the supporting base 51, the second driving assembly 52, the third driving assembly 53 and other components along the first direction X.

[0104] like Fig.10As shown, in one embodiment, the support seat 51 has a support surface 511, and the support surface 511 is arranged toward the tray 14. The support surface 511 is provided with a pressing plate 100 and a fourth driving assembly 110, and the pressing plate 100 and the fourth driving assembly 110 are connected. The pressing plate 100 can press the surface of the battery cell 20 or move away from the surface of the battery cell 20 under the drive of the fourth driving assembly 110. Optionally, the support surface 511 can be provided with a set of pressing plates 100 and the fourth driving assembly 110, or multiple sets of pressing plates 100 and the fourth driving assembly 110 can be provided, and this application does not specifically limit it.

[0105] Fig.11 A schematic diagram of a state of a pressing plate provided in an embodiment of the present application, Fig.12 Another state schematic diagram of the pressing plate provided in the embodiment of the present application is also provided. Fig.11 and Fig.12 In some embodiments, the pressing plate 100 has a first state and a second state, and the fourth driving assembly 110 is used to drive the pressing plate 100 to switch between the first state and the second state. Fig.11 As shown, the pressing plate 100 is in the first state, at which the orthographic projection of the pressing plate 100 on the plane where the supporting surface 511 is located is outside the orthographic projection of the tray 14 on the plane where the supporting surface 511 is located. Fig.12 As shown, the pressing plate 100 is in the second state, at which the orthographic projection of the pressing plate 100 on the plane where the support surface 511 is located and the orthographic projection of the tray 14 on the plane where the support surface 511 is located at least partially overlap, and the pressing plate 100 presses the battery cells 20 located on the surface of the tray 14.

[0106] During the battery production process, when the pressing plate 100 is in the first state, the battery cell 20 can be placed on the surface of the tray 14. At this time, the pressing plate 100 can avoid the battery cell 20 and will not interfere with the battery cell 20. After the battery cell 20 is placed, the pressing plate 100 can be switched from the first state to the second state, so as to press against the surface of the battery cell 20. Then, the tray 14 can be transported to the first position by the transport device 50. During the transport process, since the battery cell 20 is pressed by the pressing plate 100, the displacement of the battery cell 20 relative to the tray 14 is small, so that the alignment of the battery cell 20 and the hot pressing assembly 11 during hot pressing can be ensured to be more accurate. After the tray 14 reaches the first position, the pressing plate 100 can be switched from the second state back to the first state, so as to avoid the hot pressing assembly 11, so that the hot pressing assembly 11 can press against the surface of the battery cell 20.

[0107] When the pressing plate 100 is specifically set, the pressing plate 100 includes a variety of structural forms. For example, the pressing plate 100 can be a strip structure, a square structure or a special-shaped structure. In addition, in order to reduce the mechanical damage to the battery cell 20 caused by the pressing plate 100 pressing against the surface of the battery cell 20, a flexible gasket can be provided on the side surface of the pressing plate 100 facing the support seat 51. The flexible gasket can avoid hard contact between the pressing plate 100 and the battery cell 20 and protect the surface structure of the battery cell 20.

[0108] When the fourth driving assembly 110 is specifically configured, the fourth driving assembly 110 includes multiple ways to switch the pressing plate 100 between the first state and the second state. Fig.11 and Fig.12 In one embodiment, the fourth driving assembly 110 can drive the pressing plate 100 to rotate by a first angle, and drive the pressing plate 100 to descend by a first height in a direction close to the support seat 51, until the pressing plate 100 presses the battery cell 20, thereby switching the pressing plate 100 from the first state to the second state. The fourth driving assembly 110 can also drive the pressing plate 100 to rotate in the opposite direction by the first angle, and drive the pressing plate 100 to ascend by the first height in a direction away from the support seat 51, until the pressing plate 100 is completely removed from above the tray 14, thereby switching the pressing plate 100 from the second state back to the first state.

[0109] In a specific implementation, the fourth driving assembly 110 can make the pressing plate 100 rotate and lift at the same time, that is, the fourth driving assembly 110 can drive the pressing plate 100 to lift while rotating. Alternatively, the fourth driving assembly 110 can first drive the pressing plate 100 to lift, and then drive the pressing plate 100 to rotate. Optionally, the fourth driving assembly 110 can be a rotary cylinder.

[0110] In another embodiment, the fourth driving component 110 can drive the pressing plate 100 to approach the tray 14 in the horizontal direction, and when the pressing plate 100 moves to the top of the tray 14, the pressing plate 100 is driven to descend in the vertical direction Z until the pressing plate 100 presses the battery cell 20, thereby switching the pressing plate 100 from the first state to the second state. Conversely, the fourth driving component 110 can also drive the pressing plate 100 to rise in the vertical direction Z, so that the pressing plate 100 is separated from the battery cell 20, and then drive the pressing plate 100 to move away from the tray 14 in the horizontal direction until the pressing plate 100 is completely removed from the top of the tray 14, thereby switching the pressing plate 100 from the second state back to the first state.

[0111] On the production line, after the battery cell 20 has been subjected to the hot pressing process of the hot pressing device 10, it can also be transferred to a position corresponding to other process equipment via the transfer device 50. In one embodiment, the battery production equipment further includes a first processing device, and the transfer device 50 is further used to transfer the tray 14 to a fifth position corresponding to the first processing device, so that the first processing device processes the battery cell 20.

[0112] When the first processing device is specifically arranged, the first processing device can be located upstream of the hot pressing device 10, that is, the battery cell 20 is first processed by the first processing device and then hot-pressed by the hot pressing device 10. The first processing device can also be located downstream of the hot pressing device 10, that is, the battery cell 20 is first hot-pressed by the hot pressing device 10 and then processed by the first processing device.

[0113] The first processing device can be of various types. For example, in one embodiment, the first processing device can be a film pasting device, which is used to paste an insulating film on the surface of the hot-pressed battery cell 20. The transport device 50 is also used to transport the hot-pressed battery cell 20 to a position corresponding to the film pasting mechanism, so that the film pasting mechanism can package and film the battery cell 20. For another example, in another embodiment, the first processing device can also be a packaging device, which is used to package the hot-pressed battery cell 20 to form a shell on the outside of the battery cell 20.

[0114] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A hot pressing device, characterized in that: Used for hot pressing the battery core; comprising a tray, a hot pressing assembly, a first driving assembly and a frame; The tray is used to carry the battery core; the tray has a receiving cavity, a heating core is arranged in the receiving cavity, the heating core is used to preheat the battery core during the transportation process of the battery core, and the heating core is also used to heat the battery core during the hot pressing process of the battery core; The hot pressing assembly and the first driving assembly are arranged on the frame, and the hot pressing assembly and the first driving assembly are connected; the first driving assembly is used to drive the hot pressing assembly to move in a vertical direction; The frame has a receiving space for receiving the tray; before hot pressing, the tray is used to move into the receiving space so that the tray is located at the bottom of the hot pressing assembly; during the hot pressing process, the hot pressing assembly is used to press against the surface of the battery cell under the drive of the first driving assembly; After the hot pressing is completed, the tray is used to be moved out of the containing space; The tray has a first wall portion and a second wall portion, the first wall portion and the second wall portion enclose the accommodating cavity; the first wall portion is used to carry the battery core, and the second wall portion has a heat insulation layer; The second wall portion includes a bottom wall and a side wall, the bottom wall and the first wall portion are arranged opposite to each other, and the side wall is annularly arranged between the bottom wall and the first wall portion; The thermal insulation layer comprises a first thermal insulation layer and a second thermal insulation layer, the first thermal insulation layer is located on a side surface of the bottom wall away from the first wall portion, the second thermal insulation layer is located on the side wall, and the compressive strength of the first thermal insulation layer is greater than or equal to the compressive strength of the second thermal insulation layer; At least one boss is arranged in the accommodating space, and the at least one boss is used to support the tray.

2. The hot pressing device according to claim 1, characterized in that The second wall portion includes a bottom wall and a side wall, the bottom wall and the first wall portion are arranged opposite to each other, and the side wall is annularly arranged between the bottom wall and the first wall portion; The thermal insulation layer includes a first thermal insulation layer and a second thermal insulation layer, the first thermal insulation layer is located on the bottom wall, the second thermal insulation layer is located on the side wall, and the thickness of the first thermal insulation layer is greater than or equal to the thickness of the second thermal insulation layer.

3. The hot pressing device according to claim 2, characterized in that: The thickness of the first thermal insulation layer is d1, the thickness of the second thermal insulation layer is d2, and d1 and d2 satisfy the following relationship: .

4. The hot pressing device according to claim 1, characterized in that: The compressive strength of the first thermal insulation layer is σ, and σ satisfies the following relationship: 100N / m 2 ≤σ≤600N / m 2 .

5. The hot pressing device according to any one of claims 1 to 4, characterized in that: The distance from the heating core to the top surface of the accommodating cavity is smaller than the distance from the heating core to the bottom surface of the accommodating cavity.

6. The hot pressing device according to any one of claims 1 to 4, characterized in that: The distance from the heating core to the top surface of the accommodating cavity is less than or equal to 35 mm.

7. The hot pressing device according to claim 1, characterized in that: The hardness of the boss is greater than or equal to 32HRC; and / or, the flatness of the surface of the boss for supporting the tray is less than or equal to 0.03 mm; And / or, the parallelism of the surface of the boss used to support the tray is less than or equal to 0.08 mm.

8. A battery production device, characterized in that: It comprises a transfer device and a hot pressing device as described in any one of claims 1 to 7, wherein the transfer device is used to move the tray into the accommodation space, or to move the tray out of the accommodation space.

9. The battery production equipment according to claim 8, characterized in that: The battery production equipment further includes a track, wherein the track passes through the accommodation space; The transfer device includes a support base and a second driving assembly, wherein the support base is supported on the bottom of the tray; the second driving assembly is connected to the support base and is used to drive the support base to slide along the track.

10. The battery production equipment according to claim 9, characterized in that: The transfer device also includes a third driving component, which is connected to the support base and is used to drive the support base to rise or fall along the vertical direction.

11. The battery production equipment according to claim 10, characterized in that: The track has a first side and a second side arranged along a first direction, the first side and the second side are respectively provided with at least one boss, and the at least one boss is located in the accommodation space; The third driving assembly is specifically used to drive the support seat to descend along the vertical direction so that the tray is supported on the boss; The first direction is perpendicular to an extending direction of the track.

12. The battery production equipment according to claim 11, characterized in that: The minimum distance between the boss located on the first side and the boss located on the second side along the first direction is D0, the maximum width of the transfer device along the first direction is D1, and D0 and D1 satisfy the following relationship: D0>D1.

13. The battery production equipment according to any one of claims 9 to 12, characterized in that: The support seat has a support surface, and the support surface faces the tray; the support surface is provided with a pressing plate and a fourth driving assembly, the pressing plate is connected to the fourth driving assembly, and the pressing plate has a first state and a second state; When the pressing plate is in the first state, the orthographic projection of the pressing plate on the plane where the supporting surface is located is located outside the orthographic projection of the tray on the plane where the supporting surface is located; when the pressing plate is in the second state, the orthographic projection of the pressing plate on the plane where the supporting surface is located and the orthographic projection of the tray on the plane where the supporting surface is located at least partially overlap, and the pressing plate presses the battery cells located on the surface of the tray; The fourth driving assembly is used to drive the pressing plate to switch between the first state and the second state.

14. The battery production equipment according to claim 13, characterized in that: The fourth driving assembly is specifically used to drive the pressing plate to rotate by a first angle, and to drive the pressing plate to descend by a first height along the vertical direction, so that the pressing plate switches from the first state to the second state; The fourth driving assembly is further specifically configured to drive the pressing plate to rotate in the opposite direction to the first angle, and to drive the pressing plate to rise in the vertical direction to the first height, so that the pressing plate switches from the second state back to the first state.

15. The battery production equipment according to any one of claims 9 to 12, characterized in that: A first limiting protrusion and a second limiting protrusion arranged at intervals are provided on a side surface of the support base facing the tray, and the tray is located between the first limiting protrusion and the second limiting protrusion; Alternatively, a side surface of the tray facing the support seat has a third limiting protrusion and a fourth limiting protrusion arranged at intervals, and the support seat is located between the third limiting protrusion and the fourth limiting protrusion; Alternatively, the support seat has a first limiting protrusion and a second limiting protrusion arranged at intervals on one side surface facing the tray, and the tray is located between the first limiting protrusion and the second limiting protrusion, and the tray has a third limiting protrusion and a fourth limiting protrusion arranged at intervals on one side surface facing the support seat, and the support seat is located between the third limiting protrusion and the fourth limiting protrusion, and the arrangement direction of the first limiting protrusion and the second limiting protrusion intersects with the arrangement direction of the third limiting protrusion and the fourth limiting protrusion.

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