Lithium battery high-temperature aging line

Abstract

The utility model relates to the technical field of lithium batteries, in particular to a lithium battery high-temperature aging line which comprises a machine table, the machine table is sequentially provided with a feeding and tray loading device, a tray stacking device, a first tray conveying device, a high-temperature aging device, a second tray conveying device, a tray unloading device and a discharging and tray disassembling device, the feeding and tray loading device is used for filling trays with battery cells, and the tray stacking device is used for stacking the battery cells; the tray stacking device is used for transferring trays to a designated position and stacking the trays to form a stacked tray pile, the first tray conveying device is used for conveying the stacked tray pile to the high-temperature aging device, the high-temperature aging device is used for performing high-temperature aging on battery cells, the second tray conveying device is used for conveying the trays to the tray unloading device, and the tray unloading device is used for unloading the trays to the discharging and tray disassembling device. The discharging and tray disassembling device is used for taking out battery cells, and the tray backflow device is used for conveying empty trays of the discharging and tray disassembling device to the feeding and tray loading device. The method has the effect of improving the high-temperature aging efficiency and the automation degree of the lithium battery.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a high-temperature aging line for lithium batteries. Background Art

[0002] A lithium battery is a type of battery that is chemically based. Specifically, it is a battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. High-temperature aging of a lithium battery refers to placing a lithium battery in a high-temperature environment for a long time or subjecting it to charge and discharge cycles to simulate the use of the lithium battery under high-temperature conditions. High-temperature aging is very important for the research and development, production, and use of lithium batteries, because high-temperature environments may cause performance degradation, capacity decay, increased internal resistance, and even safety issues in lithium batteries. High-temperature aging can be used to evaluate the tolerance and stability of lithium batteries in high-temperature environments, helping technicians improve product design and material selection to improve the performance and life of lithium batteries.

[0003] In the prior art, a common detection method is to place the finished battery in a high-temperature aging box and generate high temperature through a heating device to simulate the actual working temperature. However, the current high-temperature aging box has a simple structure and poor temperature consistency inside the box. The high-temperature aging test effect on large quantities of batteries is not good, and the high-temperature aging detection method has a low degree of automation. Before and after the test, the battery needs to be manually taken in and placed in the high-temperature aging box, which has high operating requirements for operators, is unstable, and has low detection efficiency. How to design a lithium battery high-temperature aging line to automatically integrate the processes before and after the test to improve the detection efficiency of lithium batteries is a technical problem that enterprise R&D personnel urgently need to solve. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the present application provides a lithium battery high temperature aging line.

[0005] The above utility model object of the present application is achieved through the following technical solutions:

[0006] A lithium battery high temperature aging line, having battery cells and trays to be transported, comprising:

[0007] The machine platform is provided with a loading tray device, a tray stacking device, a first tray feeding device, a high-temperature aging device, a second tray feeding device, a tray unloading device and a tray unloading device in sequence along the feeding direction. The loading tray device is used to fill the tray with battery cells. The tray stacking device is used to transfer the tray filled with battery cells to a specified position and stack them one by one to form a tray stack. The first tray feeding device is used to transport the tray stack to the inside of the high-temperature aging device. The high-temperature aging device is used to perform high-temperature aging on the battery cells. The second tray feeding device is used to transport the tray in the high-temperature aging device to the tray unloading device. The device is used to unload the trays one by one to the unloading and disassembling device, and the unloading and disassembling device is used to take out the battery cells in the tray. A tray reflux device is arranged between the loading and loading device and the unloading and disassembling device, and the tray reflux device is used to transport the empty trays at the unloading and disassembling device to the loading and loading device. The machine is provided with a control system, and the control system is respectively controlled and connected with the loading and loading device, the stacking device, the first tray feeding device, the high-temperature aging device, the second tray feeding device, the unloading device, the unloading and disassembling device and the tray reflux device.

[0008] By adopting the above technical scheme, under the action of the loading and discharging device, the battery cells can be collected into the tray, the battery cells can be fixed, and the trays can be stacked in cooperation with the stacking device, which is convenient for subsequent high-temperature aging detection of large quantities of battery cells and improves the high-temperature aging efficiency. Then the first tray feeding device sends the stacked trays into the high-temperature aging device for detection, and the second tray feeding device sends the detected stacked trays to the unloading device. The unloading device unloads the stacked trays one by one to the unloading and disassembling device. The unloading and disassembling device takes out the battery cells in a single tray and completes the unloading operation, thereby completing the high-temperature aging process of the lithium battery. Among them, by setting up a tray reflux device, after all the battery cells in the tray are taken out, the tray reflux device transports the empty tray to the loading and loading device, which can complete the full-automatic rotation of the tray to provide a continuous and stable installation position for the battery cells, and without manual intervention, it can integrate various processes such as batch loading of battery cells, batch high-temperature aging of battery cells and batch unloading of battery cells to form a seamless lithium battery high-temperature aging line, improve the degree of automation of the high-temperature aging process of lithium batteries, so that the high-temperature aging process can be completed in a unified manner and reduce dependence on manual labor, thereby improving the efficiency of high-temperature aging of lithium batteries.

[0009] In a preferred example, the present application can be further configured as follows: the loading and loading device includes a loading conveyor belt, a first XYZ-axis moving module, a suction cup and an air pump, the loading conveyor belt is used to convey the battery cell to be tested, the air pump and the suction cup are both arranged on the first XYZ-axis moving module, the suction cup is connected to the air pump, and the first XYZ-axis moving module is arranged on one side of the loading conveyor belt and is used to drive the suction cup to abut against the battery cell to be tested.

[0010] By adopting the above technical solution, when the battery cell moves to the loading and traying device, the first XYZ-axis moving module drives the suction cup to move horizontally and vertically to abut the top of the battery cell, and cooperates with the air pump to make the suction cup adsorb the battery cell to complete the grabbing of the battery cell, and then the first XYZ-axis moving module drives the battery cell to move to the inside of the tray for installation to complete the battery cell traying operation, and by setting a loading conveyor belt, it can be connected to an external lithium battery production line to connect and convey the finished battery cells, so as to facilitate the subsequent high-temperature aging process.

[0011] In a preferred example, the present application can be further configured as follows: a cache slot for placing the power supply core is provided on one side of the feeding conveyor belt.

[0012] By adopting the above technical solution, a buffer slot is set so that the loading and discharging device can match the appropriate rhythm according to the working conditions of the overall aging line.

[0013] In a preferred example, the present application can be further configured as follows: the stacking device includes a second XYZ-axis moving module and a clamping assembly, the clamping assembly is installed on the second XYZ-axis moving module, the second XYZ-axis moving module is used to drive the clamping assembly to perform vertical and lateral displacements, the clamping assembly includes a mounting plate and two symmetrically arranged pushing cylinders, the two pushing cylinders are both installed on the mounting plate, and a clamping member is fixedly connected to the piston rod of each pushing cylinder, and the clamping member is used to abut one side of the tray.

[0014] By adopting the above technical solution, after the tray is filled with battery cells, the second XYZ-axis moving module drives the clamping assembly to perform horizontal and vertical displacements, so that the clamping assembly moves close to the tray to be stacked until it is directly above the tray to be stacked. At this time, two symmetrically arranged pushing cylinders drive the clamping parts to clamp the tray to be stacked, thereby completing the grabbing of the tray. Then, the second XYZ-axis moving module drives the tray to be stacked to the designated stacking position and stacks them one by one, thereby completing the tray stacking operation.

[0015] In a preferred example, the present application can be further configured as follows: the first disc feeding device includes a first conveying frame and a first driving motor, the first conveying frame is installed at the feeding place of the high-temperature aging device, the first conveying frame is rotatably installed with first rotating shafts at opposite ends, the first rotating shaft is coaxially fixedly connected with a first sprocket, a first chain is wound around the two first rotating shafts, the first chain is meshed with the first sprockets on the two first rotating shafts, a plurality of first bearing bars are fixedly connected to the outer side of the first chain, a first supporting surface for placing a stack of discs is formed between the plurality of first bearing bars, and the output shaft of the first driving motor is coaxially fixedly connected to one of the first rotating shafts.

[0016] By adopting the above technical solution, after the trays are stacked to a certain number to form a stack, the first driving motor is started to make the first rotating shaft drive the first sprocket to rotate, so that the first chain meshing with the first sprocket drives the first supporting bars to move, so that the first supporting surface formed by the first supporting bars drives the stack into the high-temperature aging device to complete the feeding detection operation.

[0017] In a preferred example, the present application can be further configured as follows: the high-temperature aging device includes a box body, a conveying assembly and a heating system, the opposite ends of the box body are respectively provided with a feed rolling shutter door and a discharge rolling shutter door, the conveying assembly includes a second conveying frame and a second driving motor, the second conveying frame is installed inside the box body and is spanned between the first tray feeding device and the second tray feeding device, the feed rolling shutter door is used to block the first tray feeding device and the second conveying frame, the discharge rolling shutter door is used to block the second tray feeding device and the second conveying frame, and the opposite ends of the second conveying frame are rotatably installed with A second rotating shaft, the second rotating shaft is coaxially fixedly connected with a second sprocket, a second chain is wound between the two second rotating shafts, the second chain is meshed with the second sprockets on the two second rotating shafts, a plurality of second bearing bars are fixedly connected to the outer side of the second chain, a second supporting surface for placing the stack of stacked discs is formed between the plurality of second bearing bars, the output shaft of the second drive motor is coaxially fixedly connected to one of the second rotating shafts, the heating system is arranged inside the box, and when the feeding rolling shutter door and the discharging rolling shutter door are both closed, the heating system is used to heat the inside of the box.

[0018] By adopting the above technical scheme, a feed rolling shutter door and a discharge rolling shutter door are set, and under the action of the control system, the inlet and outlet rolling shutter doors at both ends of the box can be opened and closed in coordination with the rhythm of the aging line. After the stack of stacked discs is conveyed to the inside of the box, the second driving motor is started to make the second rotating shaft drive the second sprocket to rotate, so that the second chain meshing with the second sprocket drives a plurality of second bearing bars to move, so that the second supporting surface formed by the plurality of second bearing bars drives the stack of stacked discs to be arranged and moved inside the box. After the stack of stacked discs on the second conveyor rack reaches a specified number, the feed rolling shutter door and the discharge rolling shutter door are closed, and the high-temperature aging test is completed under the action of the heating system.

[0019] In a preferred example, the present application can be further configured as follows: the heating system includes a plurality of heating components, and the plurality of heating components are arranged along the conveying direction of the box body; the heating components include a centrifugal fan, a heating duct, a vertical ventilation duct and a horizontal ventilation duct that are sequentially connected and communicated; the centrifugal fan and the heating duct are both installed at the top of the box body, the vertical ventilation duct is vertically installed on the inner side wall of the box body, and the horizontal ventilation duct is horizontally installed at the bottom of the box body; the second conveying rack is located between the heating duct, the vertical ventilation duct and the horizontal ventilation duct, and the vertical ventilation duct and the horizontal ventilation duct are both provided with a plurality of exhaust holes; and a heating pipe for heating is provided in the heating duct.

[0020] By adopting the above technical scheme, after the feeding rolling shutter door and the discharging rolling shutter door are closed, a U-shaped airflow channel can be formed between the centrifugal fan, the heating duct, the vertical ventilation duct and the horizontal ventilation duct inside the box, and multiple groups of continuous U-shaped airflow channels form a tunnel-like maze inside the box, so that when the centrifugal fan and the heating duct are started, the heat flow can be evenly discharged from the exhaust holes of each continuous vertical ventilation duct and each continuous horizontal ventilation duct, forming turbulence inside the box, so that the battery cells to be tested in the stack can be heated by the heat flow from all directions, ensuring the consistency of the temperature inside the box.

[0021] In a preferred example, the present application can be further configured as follows: a rock wool board is installed on the inner wall of the box.

[0022] By adopting the above technical solution and setting a rock wool board, the heat loss inside the box can be reduced to improve the efficiency of high-temperature aging of the battery cell.

[0023] In a preferred example, the present application can be further configured as follows: the pallet reflux device includes a reflux conveyor belt, the reflux conveyor belt is arranged at the bottom of the machine, a first lifting mechanism is arranged at one end of the reflux conveyor belt close to the feeding side of the machine, a second lifting mechanism is arranged at one end of the reflux conveyor belt close to the discharging side of the machine, the reflux conveyor belt is used to transport the pallet on the second lifting mechanism to the first lifting mechanism, a feeding connection port is provided on the feeding side of the machine corresponding to the position of the first lifting mechanism, the first lifting mechanism is used to drive the pallet to move to the feeding connection port, a discharging connection port is provided on the discharging side of the machine corresponding to the position of the second lifting mechanism, the second lifting mechanism is used to drive the pallet located at the discharging connection port to move to the reflux conveyor belt.

[0024] By adopting the above technical scheme, the first jacking mechanism, the reflux conveyor belt and the second jacking mechanism cooperate with the giving way of the feed connection port and the discharge connection port to form a semi-U-shaped reflux conveying route, which can realize the automatic recovery and automatic return of empty pallets. At the same time, the first tray feeding device, the high-temperature aging device and the second tray feeding device cooperate with the conveying operation of the pallet to form a complete U-shaped conveying route, so that the integration of the entire high-temperature aging line is greatly improved, and the detection efficiency and automation degree of the high-temperature aging line can be improved.

[0025] In a preferred example, the present application can be further configured as follows: the first lifting mechanism and the second lifting mechanism each include a lifting cylinder, a lifting plate and a driving assembly, the lifting cylinder is vertically fixedly connected to one end of the return conveyor belt, the lifting plate is fixedly connected to the piston rod of the lifting cylinder, the lifting plate is hollow and has a plurality of rotating rollers rotatably installed inside, and the driving assembly is arranged at the bottom of the lifting plate and is used to drive all the rotating rollers to rotate in the same direction.

[0026] By adopting the above technical solution, when the pallet is located at the second jacking mechanism, the jacking cylinder can drive the piston rod to drive the jacking plate to fall from the discharge port to the feed port of the return conveyor belt, and drive all the rotating rollers to rotate through the driving assembly to drive the pallet on the jacking plate to move to the return conveyor belt. When the pallet is located at the first jacking mechanism, all the rotating rollers can be driven to rotate through the driving assembly to drive the pallet to move to the position corresponding to the feed port on the jacking plate, so that the jacking cylinder can accurately drive the pallet to move to the feed side of the machine to complete the rotation of the pallet.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. Under the action of the loading and loading device, the battery cells can be collected into the tray, the battery cells are fixed, and the trays are stacked in cooperation with the stacking device, which is convenient for subsequent high-temperature aging detection of large quantities of battery cells and improves the high-temperature aging efficiency. Then the first tray feeding device sends the stacked trays into the high-temperature aging device for detection, and the second tray feeding device sends the stacked trays after detection to the unloading device. The unloading device unloads the stacked trays one by one to the unloading and disassembling device. The unloading and disassembling device takes out the battery cells in a single tray and completes the unloading operation, completing the process of high-temperature aging of lithium batteries. By setting up a tray reflux device, after all the battery cells in the tray are taken out, the tray reflux device transports the empty tray to the loading and loading device, which can complete the full-automatic rotation of the tray to provide a continuous and stable installation position for the battery cells without manual intervention. It can integrate various processes such as batch loading of battery cells, batch high-temperature aging of battery cells and batch unloading of battery cells to form a seamless lithium battery high-temperature aging line, improve the degree of automation of the high-temperature aging process of lithium batteries, so that the high-temperature aging process can be completed in a unified manner and reduce dependence on manual labor, thereby improving the efficiency of high-temperature aging of lithium batteries.

[0029] 2. A U-shaped airflow channel can be formed between the centrifugal fan, heating duct, vertical ventilation duct and horizontal ventilation duct inside the box. Multiple groups of continuous U-shaped airflow channels form a tunnel-like maze inside the box, so that when the centrifugal fan and the heating duct are started, the heat flow can be evenly discharged from the exhaust holes of each continuous vertical ventilation duct and each continuous horizontal ventilation duct, forming turbulence inside the box, so that the battery cells to be tested in the stack can be heated by the heat flow from all directions, ensuring the consistency of the temperature inside the box.

[0030] 3. The first lifting mechanism, the return conveyor belt and the second lifting mechanism cooperate with the feed connection port and the discharge connection port to form a semi-U-shaped return conveying route, which can realize the automatic recovery and automatic return of empty pallets. At the same time, the first tray feeding device, the high-temperature aging device and the second tray feeding device cooperate with the tray conveying operation to form a complete U-shaped conveying route, so that the integration of the entire high-temperature aging line is greatly improved, and the detection efficiency and automation degree of the high-temperature aging line can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the overall structure of a lithium battery high temperature aging line in one embodiment of the present application;

[0032] Figure 2 It is a schematic diagram of the top view layout of a lithium battery high temperature aging line in one embodiment of the present application;

[0033] Figure 3 yes Figure 1 A partial enlarged schematic diagram of part A;

[0034] Figure 4 It is a structural schematic diagram of a tray stacking device or a tray unloading device in one embodiment of the present application;

[0035] Figure 5 yes Figure 1 A partial enlarged schematic diagram of part B;

[0036] Figure 6 It is a partial structural schematic diagram of a high temperature aging device in one embodiment of the present application;

[0037] Figure 7 It is a cross-sectional schematic diagram of a high-temperature aging line of a lithium battery in one embodiment of the present application.

[0038] Figure numerals: 1, machine; 2, battery cell; 3, tray; 4, loading and loading device; 41, loading conveyor belt; 42, first XYZ axis moving module; 43, suction cup; 44, air pump; 45, four-axis robot; 5, stacking device; 51, second XYZ axis moving module; 52, mounting plate; 53, pushing cylinder; 54, clamping member; 6, first tray feeding device; 61, first conveying frame; 62, first rotating shaft; 63, first sprocket; 64, first bearing bar; 7, high temperature aging device; 71, box; 72, heating system; 721, centrifugal fan; 722, heating duct; 723, vertical ventilation duct; 724 , horizontal ventilation duct; 725, exhaust hole; 73, feeding roller shutter door; 74, discharging roller shutter door; 75, second conveyor frame; 76, second rotating shaft; 77, second sprocket; 78, second bearing bar; 8, second tray feeding device; 9, tray unloading device; 10, tray unloading and disassembling device; 11, tray stack; 12, tray reflux device; 121, reflux conveyor belt; 122, first jacking mechanism; 1221, jacking cylinder; 1222, jacking plate; 1223, driving assembly; 123, second jacking mechanism; 124, feeding connection port; 125, discharging connection port; 126, rotating roller; 13, cache slot; 14, rock wool board. DETAILED DESCRIPTION

[0039] The following is a description of exemplary embodiments of the present application in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0040] It should be noted that the terms "first", "second", etc. in the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure.

[0041] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally means that the associated objects before and after are in an "or" relationship.

[0042] A lithium battery high temperature aging line of the present application is described below with reference to the accompanying drawings.

[0043] Reference Figures 1 to 7 , among which, Figure 1 , Figure 2 and Figure 7As shown, the lithium battery high temperature aging line includes a machine 1, the machine 1 has a battery cell 2 to be transported and a tray 3, the machine 1 is sequentially provided with a loading tray device 4, a stacking tray device 5, a first tray feeding device 6, a high temperature aging device 7, a second tray feeding device 8, a tray unloading device 9 and a tray unloading device 10 along the feeding direction, the loading tray device 4 is used to fill the tray 3 with the battery cells 2, the stacking tray device 5 is used to transfer the tray 3 filled with the battery cells 2 to a designated position and stack them one by one to form a stacked tray pile 11, the first tray feeding device 6 is used to transport the stacked tray pile 11 to the inside of the high temperature aging device 7, the high temperature aging device 7 is used to perform high temperature aging detection on the battery cells 2, and the second tray feeding device 8 .... It is used to transport the tray 3 in the high-temperature aging device 7 to the unloading device 9, the unloading device 9 is used to unload the tray 3 one by one to the unloading and disassembling device 10, the unloading and disassembling device 10 is used to take out the battery cells 2 in the tray 3, and a tray reflux device 12 is arranged between the loading and disassembling device 4 and the unloading and disassembling device 10, the tray reflux device 12 is used to transport the empty tray 3 at the unloading and disassembling device 10 to the loading and disassembling device 4, the machine 1 is provided with a control system, and the control system is respectively connected to the loading and disassembling device 4, the stacking device 5, the first tray feeding device 6, the high-temperature aging device 7, the second tray feeding device 8, the unloading device 9, the unloading and disassembling device 10 and the tray The reflux device 12 is controlled and connected. Under the action of the loading and disassembling device 4, the battery cells 2 can be collected into the tray 3 to complete the fixation of the battery cells 2. The tray 3 is stacked in cooperation with the stacking device 5, which is convenient for the subsequent high-temperature aging test of a large number of battery cells 2 to improve the high-temperature aging efficiency. Then the first tray feeding device 6 sends the stacked trays 11 into the high-temperature aging device 7 for testing. The second tray feeding device 8 sends the tested stacked trays 11 to the unloading device 9. The unloading device 9 unloads the stacked trays 11 one by one to the unloading and disassembling device 10. The unloading and disassembling device 10 takes out the battery cells 2 in a single tray 3 and completes the unloading operation, completing the high-temperature aging of the lithium battery. Aging process, wherein, by setting a tray reflux device 12, after all the battery cells 2 in the tray 3 are taken out, the tray reflux device 12 transports the empty tray 3 to the loading and loading device 4, which can complete the full-automatic rotation of the tray 3 to provide a continuous and stable installation position for the battery cells 2, and without manual intervention, the various processes such as batch loading of battery cells 2, batch high-temperature aging of battery cells 2 and batch unloading of battery cells 2 can be integrated to form a seamless lithium battery high-temperature aging line, thereby improving the degree of automation of the high-temperature aging process of lithium batteries, so that the high-temperature aging process can be completed in a unified manner and reduce dependence on manual labor, thereby improving the efficiency of high-temperature aging of lithium batteries.

[0044] Among them, Figure 1 , Figure 2 and Figure 3As shown, the loading and loading device 4 includes a loading conveyor belt 41, a first XYZ axis moving module 42, a suction cup 43 and an air pump 44. The loading conveyor belt 41 is used to transport the battery cell 2 to be tested. The air pump 44 and the suction cup 43 are both arranged on the first XYZ axis moving module 42. The suction cup 43 is connected to the air pump 44. The first XYZ axis moving module 42 is arranged on one side of the loading conveyor belt 41 and is used to drive the suction cup 43 to abut against the battery cell 2 to be tested. When the battery cell 2 moves to the loading and loading device 4, the first XYZ axis moving module 42 The YZ axis moving module 42 drives the suction cup 43 to move horizontally and vertically to abut the top of the battery cell 2, and cooperates with the air pump 44 to make the suction cup 43 adsorb the battery cell 2 to complete the grabbing of the battery cell 2, and then drives the battery cell 2 to move to the inside of the tray 3 for installation through the first XYZ axis moving module 42 to complete the operation of loading the battery cell 2, and by setting up the loading conveyor belt 41, it can be connected to an external lithium battery production line to connect and convey the finished battery cell 2, so as to facilitate the subsequent high-temperature aging process.

[0045] It should be noted that, in this embodiment, the structure and implementation principle of the unloading and disassembling device 10 and the loading and disassembling device 4 are the same, so Figure 3 The structural schematic diagram of the unloading and tray-disassembling device 10 is used to illustrate the structure of the loading and loading device 4, wherein the difference lies in that the first XYZ-axis moving module 42 in the unloading and tray-disassembling device 10 will drive the suction cup 43 to move to the inside of the tray 3 to grab the battery cell 2 and complete the unloading operation, and the loading conveyor belt 41 can be optionally connected to an external lithium battery production line to connect and convey the finished battery cell 2. A four-axis robot 45 for grabbing the external finished battery cell 2 can also be set at the feeding end of the loading conveyor belt 41 to connect the external lithium battery production line. The four-axis robot 45 can adapt to lithium battery production lines in various directions and angles, and periodically grab the finished battery cells 2 to the loading conveyor belt 41, so that the finished battery cells 2 can be evenly distributed on the loading conveyor belt 41, so as to cooperate with the rhythm of the high-temperature aging line.

[0046] Furthermore, if Figure 1 As shown, a buffer slot 13 for placing the power core 2 is provided on one side of the feeding conveyor belt 41. By providing the buffer slot 13, the feeding tray device 4 can match the appropriate rhythm according to the working conditions of the overall aging line.

[0047] like Figure 1 , Figure 2 and Figure 4As shown, the stacking device 5 includes a second XYZ-axis moving module 51 and a clamping assembly, the clamping assembly is installed on the second XYZ-axis moving module 51, the second XYZ-axis moving module 51 is used to drive the clamping assembly to perform vertical and lateral displacements, the clamping assembly includes a mounting plate 52 and two symmetrically arranged pushing cylinders 53, the two pushing cylinders 53 are both installed on the mounting plate 52, and a clamping member 54 is fixedly connected to the piston rod of each pushing cylinder 53, the clamping member 54 is used to abut one side of the tray 3, after the battery cells 2 fill the tray 3, the second XYZ-axis moving module 51 drives the clamping assembly to perform horizontal and vertical displacements, so that the clamping assembly moves close to the tray 3 to be stacked until it is directly above the tray 3 to be stacked, at this time, the two symmetrically arranged pushing cylinders 53 drive the clamping member 54 to clamp the tray 3 to be stacked, complete the grabbing of the tray 3, and then the second XYZ-axis moving module 51 drives the tray 3 to be stacked to move to the specified stacking position and stack them one by one, to complete the stacking operation of the tray 3.

[0048] It should be noted that the structure and implementation principle of the unloading device 9 are the same as those of the stacking device 5. The difference is that the second XYZ axis moving module 51 in the unloading device 9 will drive the clamping assembly to remove the stacked disks 11 one by one from top to bottom after inspection.

[0049] It should also be noted that, in the present embodiment, the above-mentioned first XYZ-axis moving module 42 and second XYZ-axis moving module 51 both include an X-axis moving module, a Y-axis moving module and a Z-axis moving module, which are respectively responsible for driving the clamping assembly to move on the X, Y and Z axes to achieve three-axis movement, wherein the X-axis moving module and the Y-axis moving module are driven by a motor and are equipped with guide rails or linear slide rails to achieve smooth horizontal movement, and the Z-axis moving module is driven by a motor and is equipped with a ball screw or a linear guide rail, and can also be driven by an electric cylinder to achieve precise movement in the vertical direction, and both are common moving module configurations, which can be configured by staff according to needs, which is common knowledge of technicians in this field and will not be elaborated here.

[0050] In addition, if Figure 1 and Figure 5As shown, the first tray feeding device 6 includes a first conveying frame 61 and a first driving motor (not shown in the figure). The first conveying frame 61 is installed at the feeding place of the high-temperature aging device 7. The first rotating shafts 62 are rotatably installed at the opposite ends of the first conveying frame 61. The first rotating shafts 62 are coaxially fixedly connected with the first sprocket 63. A first chain (not shown in the figure) is wound between the two first rotating shafts 62. The first chain is meshed with the first sprockets 63 on the two first rotating shafts 62. A plurality of first bearing bars 64 are fixedly connected to the outer side of the first chain. A first supporting surface for placing the stacked tray 11 is formed between the plurality of first bearing bars 64. The output shaft of the first driving motor is coaxially fixedly connected to one of the first rotating shafts 62. After the trays 3 are stacked to a certain number to form the stacked tray 11, the first driving motor is started to make the first rotating shaft 62 drive the first sprocket 63 to rotate, so that the first chain meshed with the first sprocket 63 drives the plurality of first bearing bars 64 to move, so that the first supporting surface formed by the plurality of first bearing bars 64 drives the stacked tray 11 into the high-temperature aging device 7 to complete the feeding detection operation.

[0051] It should be noted that the second tray feeding device 8 and the first tray feeding device 6 have the same structure, implementation principle and conveying direction, and the difference lies in the different positions of the second tray feeding device 8 and the first tray feeding device 6 .

[0052] In order to realize the continuous transportation of the tray 3 and the high temperature aging detection function of the battery cell 2, as Figure 1 , Figure 2 and Figure 6As shown, in this embodiment, the high-temperature aging device 7 includes a box body 71, a conveying assembly and a heating system 72. The opposite ends of the box body 71 are respectively provided with a feed rolling shutter door 73 and a discharge rolling shutter door 74. The conveying assembly includes a second conveying frame 75 and a second driving motor (not shown in the figure). The second conveying frame 75 is installed inside the box body 71 and is built between the first feeding disk device 6 and the second feeding disk device 8. The feed rolling shutter door 73 is used to block the first feeding disk device 6 and the second conveying frame 75, and the discharge rolling shutter door 74 is used to block the second feeding disk device 8 and the second conveying frame 75. By arranging the feed rolling shutter door 73 and the discharge rolling shutter door 74, the inlet and outlet of the box body 71 can be opened and closed in coordination with the beat of the aging line under the action of the control system. The opposite ends of the second conveying frame 75 are rotatably installed with a second rotating shaft 76, and the second rotating shaft 76 is coaxially fixedly connected with a second sprocket 77. A second chain (not shown in the figure) is wound between the two second rotating shafts 76. The second chain and the two second rotating shafts 7 6 is meshed with a second sprocket 77 on the second chain, a plurality of second bearing bars 78 are fixedly connected to the outside of the second chain, a second supporting surface for placing the stack of stacked discs 11 is formed between the plurality of second bearing bars 78, the output shaft of the second drive motor is coaxially fixedly connected to one of the second rotating shafts 76, the heating system 72 is arranged inside the box body 71, and when the feeding rolling shutter door 73 and the discharging rolling shutter door 74 are both closed, the heating system 72 is used to heat the inside of the box body 71, and after the stack of stacked discs 11 is transported to the inside of the box body 71, the second rotating shaft 76 drives the second sprocket 77 to rotate by starting the second drive motor, so that the second chain meshed with the second sprocket 77 drives the plurality of second bearing bars 78 to move, so that the second supporting surface formed by the plurality of second bearing bars 78 drives the stack of stacked discs 11 to be arranged and moved inside the box body 71, and after the stack of stacked discs 11 on the second conveying frame 75 reaches a specified number, the feeding rolling shutter door 73 and the discharging rolling shutter door 74 are closed, and under the action of the heating system 72, the high temperature aging test is completed.

[0053] Specifically, Figure 6As shown, the heating system 72 includes a plurality of heating components, which are arranged along the conveying direction of the box body 71. The heating components include a centrifugal fan 721, a heating pipe 722, a vertical ventilation pipe 723 and a horizontal ventilation pipe 724 which are connected and communicated in sequence. The centrifugal fan 721 and the heating pipe 722 are both installed at the top of the box body 71, the vertical ventilation pipe 723 is vertically installed on the inner wall of the box body 71, and the horizontal ventilation pipe 724 is horizontally installed at the bottom of the box body 71. The second conveying rack 75 is located between the heating pipe 722, the vertical ventilation pipe 723 and the horizontal ventilation pipe 724. The vertical ventilation pipe 723 and the horizontal ventilation pipe 724 are both provided with a plurality of exhaust holes 725. The heating pipe 722 is provided with a heating pipe for heating. The heating tube (not shown in the figure) can form a U-shaped airflow channel between the centrifugal fan 721, the heating duct 722, the vertical ventilation duct 723 and the horizontal ventilation duct 724 inside the box 71 after the feeding rolling shutter door 73 and the discharging rolling shutter door 74 are closed. A plurality of continuous U-shaped airflow channels form a tunnel-like maze inside the box 71, so that when the centrifugal fan 721 and the heating tube are started, the heat flow can be evenly discharged from the exhaust holes 725 of each continuous vertical ventilation duct 723 and the exhaust holes 725 of each continuous horizontal ventilation duct 724, forming turbulence inside the box 71, so that the battery cells 2 to be tested in the stack 11 can be heated by the heat flow from all directions, thereby ensuring the consistency of the temperature inside the box 71.

[0054] Furthermore, if Figure 6 As shown, a rock wool board 14 is installed on the inner wall of the box body 71. By providing the rock wool board 14, the heat loss inside the box body 71 can be reduced to improve the high-temperature aging efficiency of the battery cell 2.

[0055] In addition, if Figure 1 and Figure 7As shown, in order to realize the automatic recovery and automatic return of the pallet 3, the pallet reflux device 12 includes a reflux conveyor belt 121, which is arranged at the bottom of the machine 1, and a first jacking mechanism 122 is arranged at one end of the reflux conveyor belt 121 close to the feeding side of the machine 1, and a second jacking mechanism 123 is arranged at one end of the reflux conveyor belt 121 close to the discharging side of the machine 1. The reflux conveyor belt 121 is used to transport the pallet 3 on the second jacking mechanism 123 to the first jacking mechanism 122, and a feeding connection port 124 is provided at a position corresponding to the first jacking mechanism 122 on the feeding side of the machine 1. The first jacking mechanism 122 is used to drive the pallet 3 to move to the feeding connection port 124, and the discharging side of the machine 1 corresponds to the second jacking mechanism 123. A discharge connection port 125 is provided at the position, and the second lifting mechanism 123 is used to drive the pallet 3 located at the discharge connection port 125 to move to the return conveyor belt 121. Between the first lifting mechanism 122, the return conveyor belt 121 and the second lifting mechanism 123 inside the box body 71, in coordination with the giving way of the feed connection port 124 and the discharge connection port 125, a semi-U-shaped return conveying route can be formed to realize automatic recovery and automatic return of the empty pallet 3, and at the same time, in coordination with the first tray feeding device 6, the high-temperature aging device 7 and the second tray feeding device 8 for the conveying operation of the pallet 3, a complete U-shaped conveying route can be formed, so that the integration of the entire high-temperature aging line is greatly improved, and the detection efficiency and automation degree of the high-temperature aging line can be improved.

[0056] Specifically, Figure 7 As shown, the first lifting mechanism 122 and the second lifting mechanism 123 both include a lifting cylinder 1221, a lifting plate 1222 and a driving assembly 1223. The lifting cylinder 1221 is vertically fixedly connected to one end of the return conveyor belt 121, and the lifting plate 1222 is fixedly connected to the piston rod of the lifting cylinder 1221. The lifting plate 1222 is hollow and has a plurality of rotating rollers 126 installed therein. The driving assembly 1223 is arranged at the bottom of the lifting plate 1222 and is used to drive all the rotating rollers 126 to rotate in the same direction. When the tray 3 is located at the second lifting mechanism 123, the lifting cylinder 1221 can drive the piston The rod drives the lifting plate 1222 to fall from the discharge connection port 125 to the feed port of the return conveyor belt 121, and drives all the rotating rollers 126 to rotate through the driving component 1223 to drive the tray 3 on the lifting plate 1222 to move to the return conveyor belt 121. When the tray 3 is located at the first lifting mechanism 122, all the rotating rollers 126 can be driven to rotate through the driving component 1223 to drive the tray 3 to move to the position corresponding to the feed connection port 124 on the lifting plate 1222, so that the lifting cylinder 1221 can accurately drive the tray 3 to move to the feed side of the machine 1 to complete the rotation of the tray 3.

[0057] It should be noted that the driving component 1223 can select any structure that can drive all the rotating rollers 126 to rotate in the same direction, such as using a motor as a driving source, and a sprocket coaxially installed on the rotating roller 126 and a chain wound around and meshed between multiple sprockets as a configuration combination of transmission parts, and there is no limitation here.

[0058] The implementation principle of a lithium battery high temperature aging line in the embodiment of the present application is as follows: during operation, the loading conveyor belt 41 transports the external battery cells 2 to the loading tray device 4, the first XYZ axis moving module 42 drives the suction cup 43 to abut the top of the battery cell 2, and cooperates with the air pump 44 to make the suction cup 43 adsorb and complete the grabbing of the battery cell 2, and then moves to the inside of the tray 3 to complete the loading of the battery cell 2. After the battery cells 2 fill the tray 3, the second XYZ axis moving module 51 drives the clamping assembly to clamp the tray 3 to the designated stacking position and stack them one by one to form a stack 11. After the stacking operation of the tray 3 is completed, the first driving motor drives the first rotating shaft 62 to drive the first sprocket 63 to rotate, so that the first chain meshed with the first sprocket 63 drives the first supporting bars 64 to move, so that the first supporting surface formed by the first supporting bars 64 drives the stack 11 into the second conveying frame 75 inside the box body 71, and then starts the second driving motor to make the second rotating shaft 76 drive the first The second sprocket 77 rotates, so that the second chain meshed with the second sprocket 77 drives the plurality of second bearing bars 78 to move, so that the second supporting surface formed by the plurality of second bearing bars 78 drives the stack of trays 11 to be arranged and moved inside the box body 71. After the stack of trays 11 on the second conveyor frame 75 reaches the specified number, the feeding shutter door 73 and the discharging shutter door 74 are closed. Under the action of the heating system 72, the high-temperature aging test is completed, and then the second tray feeding device 8, the tray unloading device 9 and the unloading and disassembling device 10 are connected in sequence to complete the conveying and disassembling processes of the stack of trays 11 and the unloading process of the battery cell 2. Finally, the empty tray 3 passes through the second jacking mechanism 123, the reflux conveyor belt 121 and the first jacking mechanism 122, and cooperates with the giving way of the feeding connection port 124 and the discharging connection port 125 to complete the semi-circular reflux conveying route and return to the feeding side of the machine 1 to prepare for the next cycle of the aging line, forming a seamless lithium battery high-temperature aging line.

[0059] It should also be noted that a lithium battery high-temperature aging line of the present application can also be used in the static process after the lithium battery is filled with liquid. The difference in the process flow lies in that in the high-temperature aging process and the static process, the temperature of the battery cell inside the high-temperature aging device and the time of passing through the high-temperature aging device are different. In the static process, it is necessary to select appropriate temperature and time to ensure uniform electrolyte penetration and stable state after the battery cell is filled with liquid, while in the high-temperature aging process, it is necessary to select appropriate temperature and time to simulate the use of lithium batteries under high temperature conditions as much as possible.

[0060] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A lithium battery high temperature aging line, comprising a battery cell (2) to be transported and a tray (3), characterized in that: include: A machine (1), wherein the machine (1) is provided with a loading tray device (4), a tray stacking device (5), a first tray feeding device (6), a high temperature aging device (7), a second tray feeding device (8), a tray unloading device (9) and a tray unloading device (10) in sequence along a feeding direction, wherein the loading tray device (4) is used to fill a tray (3) with battery cells (2), the tray stacking device (5) is used to transfer the tray (3) filled with battery cells (2) to a designated position and stack them one by one to form a tray stack (11), the first tray feeding device (6) is used to transport the tray stack (11) to the inside of the high temperature aging device (7), the high temperature aging device (7) is used to perform high temperature aging on the battery cells (2), the second tray feeding device (8) is used to transport the tray (3) in the high temperature aging device (7) to the tray unloading device (9), and the The tray unloading device (9) is used to unload the trays (3) one by one to the unloading and tray dismantling device (10), and the unloading and tray dismantling device (10) is used to take out the battery cells (2) in the tray (3). A tray reflux device (12) is provided between the loading and loading device (4) and the unloading and tray dismantling device (10), and the tray reflux device (12) is used to transport the empty trays (3) at the unloading and tray dismantling device (10) to the loading and loading device (4). The machine (1) is provided with a control system, and the control system is respectively connected to the loading and loading device (4), the stacking device (5), the first tray feeding device (6), the high temperature aging device (7), the second tray feeding device (8), the tray unloading device (9), the unloading and tray dismantling device (10) and the tray reflux device (12).

2. A lithium battery high temperature aging line as claimed in claim 1, characterized in that: The loading and loading device (4) comprises a loading conveyor belt (41), a first XYZ axis moving module (42), a suction cup (43) and an air pump (44); the loading conveyor belt (41) is used to convey the battery cell (2) to be tested; the air pump (44) and the suction cup (43) are both arranged on the first XYZ axis moving module (42); the suction cup (43) is connected to the air pump (44); the first XYZ axis moving module (42) is arranged on one side of the loading conveyor belt (41) and is used to drive the suction cup (43) to abut against the battery cell (2) to be tested.

3. A lithium battery high temperature aging line as claimed in claim 2, characterized in that: A buffer slot (13) for placing the power supply core (2) is provided on one side of the loading conveyor belt (41).

4. A lithium battery high temperature aging line as claimed in claim 1, characterized in that: The stacking device (5) comprises a second XYZ axis moving module (51) and a clamping assembly, wherein the clamping assembly is mounted on the second XYZ axis moving module (51), and the second XYZ axis moving module (51) is used to drive the clamping assembly to perform vertical and lateral displacements, and the clamping assembly comprises a mounting plate (52) and two symmetrically arranged pushing cylinders (53), wherein the two pushing cylinders (53) are both mounted on the mounting plate (52), and a clamping member (54) is fixedly connected to the piston rod of each pushing cylinder (53), and the clamping member (54) is used to abut against one side of the tray (3).

5. A lithium battery high temperature aging line as claimed in claim 1, characterized in that: The first disc feeding device (6) comprises a first conveying frame (61) and a first driving motor. The first conveying frame (61) is installed at the feeding place of the high-temperature aging device (7). First rotating shafts (62) are rotatably installed at opposite ends of the first conveying frame (61). The first rotating shaft (62) is coaxially fixedly connected with a first sprocket (63). A first chain is wound between the two first rotating shafts (62). The first chain is meshed with the first sprockets (63) on the two first rotating shafts (62). A plurality of first bearing bars (64) are fixedly connected to the outer side of the first chain. A first supporting surface for placing the stacked discs (11) is formed between the plurality of first bearing bars (64). The output shaft of the first driving motor is coaxially fixedly connected to one of the first rotating shafts (62).

6. A lithium battery high temperature aging line as claimed in claim 1, characterized in that: The high-temperature aging device (7) comprises a box body (71), a conveying assembly and a heating system (72); opposite ends of the box body (71) are respectively provided with a material-feeding rolling shutter door (73) and a material-discharging rolling shutter door (74); the conveying assembly comprises a second conveying frame (75) and a second driving motor; the second conveying frame (75) is installed inside the box body (71) and is spanned between the first tray feeding device (6) and the second tray feeding device (8); the material-feeding rolling shutter door (73) is used to block the first tray feeding device (6) and the second conveying frame (75); the material-discharging rolling shutter door (74) is used to block the second tray feeding device (8) and the second conveying frame (75); and opposite ends of the second conveying frame (75) are rotatably provided with second rotating shafts (76) ), the second rotating shaft (76) is coaxially fixedly connected to a second sprocket (77), a second chain is wound between the two second rotating shafts (76), the second chain is meshed with the second sprockets (77) on the two second rotating shafts (76), a plurality of second bearing bars (78) are fixedly connected to the outer side of the second chain, a second supporting surface for placing the stack of stacked discs (11) is formed between the plurality of second bearing bars (78), the output shaft of the second drive motor is coaxially fixedly connected to one of the second rotating shafts (76), the heating system (72) is arranged inside the box body (71), and when the feeding rolling shutter door (73) and the discharging rolling shutter door (74) are both closed, the heating system (72) is used to heat the inside of the box body (71).

7. A lithium battery high temperature aging line as claimed in claim 6, characterized in that: The heating system (72) comprises a plurality of heating components, which are arranged along the conveying direction of the box (71). The heating components comprise a centrifugal fan (721), a heating pipe (722), a vertical ventilation pipe (723) and a horizontal ventilation pipe (724) which are connected and communicated in sequence. The centrifugal fan (721) and the heating pipe (722) are both installed at the top of the box (71), the vertical ventilation pipe (723) is vertically installed on the inner side wall of the box (71), and the horizontal ventilation pipe (724) is horizontally installed at the bottom of the box (71). The second conveying frame (75) is located between the heating pipe (722), the vertical ventilation pipe (723) and the horizontal ventilation pipe (724), and the vertical ventilation pipe (723) and the horizontal ventilation pipe (724) are both provided with a plurality of exhaust holes (725). A heating pipe for heating is provided in the heating pipe (722).

8. A lithium battery high temperature aging line as claimed in claim 6, characterized in that: A rock wool board (14) is installed on the inner wall of the box body (71).

9. A lithium battery high temperature aging line as claimed in claim 1, characterized in that: The tray reflow device (12) comprises a reflow conveyor belt (121), the reflow conveyor belt (121) being arranged at the bottom of the machine platform (1), a first lifting mechanism (122) being arranged at one end of the reflow conveyor belt (121) close to the feeding side of the machine platform (1), a second lifting mechanism (123) being arranged at one end of the reflow conveyor belt (121) close to the discharging side of the machine platform (1), the reflow conveyor belt (121) being used to convey the tray (3) on the second lifting mechanism (123) to the first lifting mechanism The machine (1) has a feeding connection port (124) at a position corresponding to the first lifting mechanism (122) on the feeding side of the machine (1), the first lifting mechanism (122) is used to drive the tray (3) to move to the feeding connection port (124), and the machine (1) has a discharging connection port (125) at a position corresponding to the second lifting mechanism (123) on the discharging side of the machine (1), the second lifting mechanism (123) is used to drive the tray (3) located at the discharging connection port (125) to move to the return conveyor belt (121).

10. A lithium battery high temperature aging line as claimed in claim 9, characterized in that: The first lifting mechanism (122) and the second lifting mechanism (123) both comprise a lifting cylinder (1221), a lifting plate (1222) and a driving assembly (1223); the lifting cylinder (1221) is vertically fixedly connected to one end of the return conveyor belt (121); the lifting plate (1222) is fixedly connected to the piston rod of the lifting cylinder (1221); the lifting plate (1222) is hollow and has a plurality of rotating rollers (126) rotatably mounted therein; the driving assembly (1223) is disposed at the bottom of the lifting plate (1222) and is used to drive all the rotating rollers (126) to rotate in the same direction.

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