Battery cell heating device and method

Abstract

The present application relates to a battery cell heating device and method. The battery cell heating device comprises a carrier, a conveying mechanism, a heating mechanism, a first temperature measuring mechanism, and a control mechanism. The heating mechanism comprises at least one first heating module and at least one second heating module, the first heating module and the second heating module are arranged in the conveying direction of the conveying mechanism, and the conveying mechanism is used for driving the carrier to sequentially pass through the first heating module and the second heating module. The first temperature measuring mechanism comprises a first temperature measuring member in communication connection with the control mechanism; the first temperature measuring member is used for measuring a first temperature of a battery cell after being heated by the first heating module adjacent to the second heating module and before being heated by the second heating module; the control mechanism is used for controlling, on the basis of the difference between the first temperature and a preset temperature, the second heating module to adjust heating power to ensure the heating temperature of the battery cell, improving the qualification rate of subsequent hot-press shaping of the battery cell, and reducing the scrap rate of the battery cell.

Description

Battery core heating device and method

[0001] This application is based on and claims priority to Chinese patent application with application number CN202311191163.8 and application date September 15, 2023, Chinese patent application with application number CN202420542656.5 and application date March 19, 2024, and Chinese patent application with application number CN202421343707.8 and application date June 13, 2024. The entire contents of the above applications are hereby introduced into this application as a whole. Technical Field

[0002] The present application relates to the technical field of lithium battery cell production equipment, and in particular to a battery cell heating device and method. Background Art

[0003] During lithium battery production, a cell heating device is required to heat the wound cells for subsequent hot pressing and shaping. If the heating temperature is too high, the cells will burn, resulting in cell scrap. If the heating temperature is too low, the cells will not be heated sufficiently, resulting in substandard dimensions after hot pressing and shaping, hindering cell packaging. Traditional cell heating devices cannot maintain the required temperature for heating the cells, resulting in a high scrap rate. Application Contents

[0004] The embodiments of the present application provide a battery cell heating device and method, which aim to solve the problem that conventional battery cell heating devices cannot guarantee the temperature of heated battery cells and result in a high battery cell scrap rate.

[0005] In the first aspect, the present application provides a battery cell heating device, comprising: a carrier, which is used to carry battery cells; a conveying mechanism and a heating mechanism, the heating mechanism comprising at least one first heating module and at least one second heating module, the first heating module and the second heating module being arranged along the conveying direction of the conveying mechanism, and the conveying mechanism being used to drive the carrier to pass through the first heating module and the second heating module in sequence; a first temperature measuring mechanism, the first temperature measuring mechanism comprising a first temperature measuring component, the first temperature measuring component being used to detect a first temperature of the battery cell after being heated by the first heating module adjacent to the second heating module and before being heated by the second heating module; and a control mechanism, the control mechanism being communicatively connected to the first temperature measuring component, the control mechanism being used to control the second heating module to adjust the heating power according to the difference between the first temperature and a preset temperature.

[0006] In a second aspect, the present application provides a battery cell heating method and a battery cell heating device as described above, the battery cell heating method comprising: transporting the battery cell through the first heating module, and the first heating module heating the battery cell; detecting the first temperature of the battery cell after being heated by the first heating module adjacent to the second heating module and before being heated by the second heating module; comparing the first temperature with a preset temperature, and adjusting the heating power of the second heating module according to the difference between the first temperature and the preset temperature; the second heating module heats the battery cell according to the heating power.

[0007] Compared with the prior art, the present invention has the following advantages:

[0008] In the technical solution of the present application, the carrier is driven by the conveying mechanism to pass through the first heating module, and the first heating module heats the battery cell. After the battery cell is heated by the first heating module adjacent to the second heating module, the first temperature measuring component detects the first temperature of the battery cell. The control mechanism compares the first temperature with the preset temperature, and controls the second heating module to adjust the heating power according to the difference between the first temperature and the preset temperature. For example, if the first temperature is greater than the preset temperature, the power of the second heating module is appropriately reduced; if the first temperature is less than the preset temperature, the power of the second heating module is appropriately increased. This technical solution increases the probability that the final temperature of the battery cell after passing through the battery cell heating device falls within the preset temperature range, thereby ensuring the heating temperature of the battery cell, improving the pass rate of subsequent hot pressing and shaping of the battery cell, and reducing the scrap rate of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0010] FIG1 is a schematic structural diagram of a battery core heating device according to an embodiment of the present application;

[0011] FIG2 is a schematic structural diagram of a first temperature measuring mechanism according to an embodiment of the present application;

[0012] FIG3 is a schematic structural diagram of a first temperature measuring mechanism according to another embodiment of the present application;

[0013] FIG4 is a schematic structural diagram of a material detection mechanism according to an embodiment of the present application;

[0014] FIG5 is a flow chart 1 of a battery cell heating method according to an embodiment of the present application;

[0015] FIG6 is a second flow chart of a battery cell heating method according to an embodiment of the present application;

[0016] FIG7 is a schematic structural diagram of a battery core heating device according to an embodiment of the present application;

[0017] FIG8 is a top view of a battery core heating device according to an embodiment of the present application;

[0018] FIG9 is a schematic structural diagram of a first pressing portion of a battery core heating device according to an embodiment of the present application;

[0019] FIG10 is a cross-sectional schematic diagram of a shaping component of a battery core heating device according to an embodiment of the present application;

[0020] FIG11 is an enlarged view of a partial area A of a cross-sectional schematic diagram of a shaping assembly of a battery core heating device according to an embodiment of the present application;

[0021] FIG12 is a schematic structural diagram of a second temperature measuring mechanism of a battery core heating device according to an embodiment of the present application;

[0022] FIG13 is a schematic flow chart of a method for heating a battery cell according to an embodiment of the present application;

[0023] FIG14 is a schematic structural diagram of a shaping head according to an embodiment of the present application;

[0024] FIG15 is a cross-sectional view of FIG14;

[0025] FIG16 is an enlarged schematic diagram of area B in FIG14 ;

[0026] FIG17 is a cross-sectional view of a shaping head according to an embodiment of the first aspect of the present application;

[0027] FIG18 is a cross-sectional view of another shaping head according to the embodiment of the first aspect of the present application;

[0028] FIG19 is an enlarged view of area C in FIG18 ;

[0029] FIG20 is a schematic structural diagram of a heating module according to an embodiment of the present application.

[0030] FIG21 is a schematic diagram of the overall structure of a battery cell heating and pre-shaping device according to an embodiment of the present application;

[0031] FIG22 is an enlarged view of portion D in FIG21;

[0032] FIG23 is a front view schematic diagram of the overall structure of a battery cell heating and pre-shaping device according to an embodiment of the present application.

[0033] Description of Figure Numbers:

[0034] 10. Carrier; 11. Guide rail; 111. Plane portion; 112. First inclined portion; 113. Second inclined portion; 12. Battery cell;

[0035] 20. Conveying mechanism; 21. First transmission assembly; 211. First transmission gear; 212. Second transmission gear; 213. First transmission chain; 214. First transmission shaft; 215. Motor; 22. Second transmission assembly; 221. Third transmission gear; 222. Fourth transmission gear; 223. Second transmission chain; 224. Second transmission shaft;

[0036] 30. Heating mechanism; 31. First heating module; 32. Second heating module; 33. Heating unit; 34. Frame; 341. Support plate; 35. Shaping assembly; 351. First pressing portion; 352. Second pressing portion; 353. Heating element; 354. Shaping head; 36. Lifting support frame; 37. Lifting assembly;

[0037] 40. First temperature measuring mechanism; 41. First temperature measuring member; 411. Guide wheel; 413. First temperature sensor; 42. Drive assembly; 421. First drive member; 422. First elastic member; 423. First guide rod; 424. Adapter plate; 425. First linear bearing; 426. First sheath; 43. Compression buffer assembly; 431. Second guide rod; 432. Second elastic member; 433. Second linear bearing; 434. Second sheath; 435. Fixing block; 44. Mounting member; 441. Insulation chamber;

[0038] 50. Second temperature measuring mechanism; 51. Upper temperature measuring unit; 52. Lower temperature measuring unit; 53. Second temperature sensor;

[0039] 60. Material detection mechanism; 61. Fixed bracket; 611. Strip hole; 62. Adjustment bracket; 63. Position sensor; 64. Fixing piece; 70. Frame; 71. Support frame; 72. Column; 73. Beam;

[0040] 8. Single heating module; 8110. Support platform; 8211. Mounting slot; 82112. Notch; 8213. First thermal insulation board; 82131. Wiring trough; 8214. Second thermal insulation board; 82141. Second thermal insulation slot; 82142. Boss; 8215. First accommodating slot; 8216. Support column; 8221. Temperature measuring surface; 8230. Temperature conducting element;

[0041] 9100, support frame; 9211, first pressing surface; 9221, second pressing surface; 9310, guide rail; 9320, sliding frame; 9331, electric cylinder; 9400, limit block; 9500, limit screw; 9600, pressure sensor. DETAILED DESCRIPTION

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

[0043] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0044] It should also be understood that the terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0045] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0046] Refer to Figure 1, which shows a schematic structural diagram of a battery cell heating device according to an embodiment of the present application. The battery cell heating device provided by an embodiment of the present application includes a carrier 10, a conveying mechanism 20, a heating mechanism 30, a first temperature measuring mechanism 40 and a control mechanism. The heating mechanism 30 includes at least one first heating module 31 and at least one second heating module 32. The first heating module 31 and the second heating module 32 are arranged along the conveying direction of the conveying mechanism 20. The conveying mechanism 20 is used to drive the carrier 10 to pass through the first heating module 31 and the second heating module 32 in sequence. The first temperature measuring mechanism 40 includes a first temperature measuring component 41 that is communicatively connected to the control mechanism. The first temperature measuring component 41 is used to detect the first temperature of the battery cell after it is heated by the first heating module 31 adjacent to the second heating module 32 and before it is heated by the second heating module 32. The control mechanism is used to control the second heating module 32 to adjust the heating power according to the difference between the first temperature and the preset temperature.

[0047] It should be noted that the first temperature measuring element 41 is used to detect the first temperature of the battery cell after it is heated by the first heating module 31 adjacent to the second heating module 32 and before it is heated by the second heating module 32. There are three situations for the setting position of the first temperature measuring element 41: the first situation is that the first temperature measuring element 41 is set corresponding to the first heating module 31 adjacent to the second heating module 32. When the battery cell passes through the first heating module 31 adjacent to the second heating module 32, the first temperature measuring element 41 detects the first temperature of the battery cell; the second situation is that , the first temperature measuring component 41 is set corresponding to the second heating module 32 adjacent to the first heating module 31, and when the battery cell passes through the second heating module 32 adjacent to the first heating module 31 and before the second heating module 32 heats the battery cell, the first temperature measuring component 41 detects the temperature of the battery cell; the third type, the first temperature measuring component 41 is set between the first heating module 31 and the second heating module 32, and when the battery cell passes between the first heating module 31 and the second heating module 32, the first temperature measuring component 41 detects the temperature of the battery cell.

[0048] It should be noted that the number of the first heating modules 31 and the second heating modules 32 can be set according to actual needs and is not specifically limited here.

[0049] In this embodiment, there are seven first heating modules 31 and one second heating module 32, and the seven first heating modules 31 and one second heating module 32 are arranged along the conveying direction of the conveying mechanism 20. In this way, the temperature of the battery cell gradually increases.

[0050] During operation, the battery cell heating device places the battery cell on the carrier 10. The conveying mechanism 20 then drives the carrier 10 past the first heating module 31, which heats the battery cell. After the battery cell is heated by the first heating module 31, which is adjacent to the second heating module 32, and before being heated by the second heating module 32, the first temperature measuring element 41 detects the first temperature of the battery cell. The control mechanism compares the first temperature with a preset temperature and, based on the difference between the first and preset temperatures, controls the second heating module 32 to adjust the heating power. For example, if the first temperature is greater than the preset temperature, the power of the second heating module is appropriately reduced; if the first temperature is less than the preset temperature, the power of the second heating module is appropriately increased. This increases the probability that the final temperature of the battery cell after passing through the battery cell heating device falls within the preset temperature range, improves the pass rate of subsequent battery cell hot pressing and shaping, and reduces the scrap rate of the battery cell. In one embodiment, referring to FIG. 1 , the battery cell heating device further includes an equipment bracket 70, on which the conveying mechanism 20 is mounted. In this way, the equipment bracket 70 plays a role in supporting the conveying mechanism 20, and at the same time, the equipment bracket 70 also plays a role in raising the height of the conveying mechanism 20, making it easier for operators to operate.

[0051] In one embodiment, referring to FIG. 1 , the conveying mechanism 20 includes a first transmission assembly 21 and a second transmission assembly 22. The first transmission assembly 21 and the second transmission assembly 22 are spaced apart in a direction perpendicular to the conveying direction. Specifically, the first transmission assembly 21 includes a first transmission chain 213, a first transmission gear 211, and a second transmission gear 212 spaced apart in the conveying direction. The first transmission chain 213 is wound around the first transmission gear 211 and the second transmission gear 212. The second transmission assembly 22 includes a second transmission chain 223, a third transmission gear 221 opposite the first transmission gear 211, and a fourth transmission gear 222 opposite the second transmission gear 212. The second transmission chain 223 is wound around the third transmission gear 221 and the fourth transmission gear 222. The carrier 10 is connected to the first transmission chain 213 and the second transmission chain 223 on both sides along the conveying direction, respectively.

[0052] 1 , the conveying mechanism 20 further includes a motor 215, a first transmission shaft 214, and a second transmission shaft 224. The first transmission shaft 214 connects the first transmission gear 211 and the third transmission gear 221, and the second transmission shaft 224 connects the second transmission gear 212 and the fourth transmission gear 222. The motor 215 is in driving connection with the first transmission shaft 214.

[0053] Of course, in other embodiments, the conveying mechanism 20 may also be a belt transmission mechanism, but is not limited thereto.

[0054] In one embodiment, referring to FIG1 , the battery cell heating device further comprises a plurality of support frames 71 , which are spaced apart along the conveying direction. Specifically, the support frames 71 include a crossbeam 73 and two uprights 72 , with the two uprights 72 positioned on either side of the conveying mechanism 20 along the conveying direction. The ends of the crossbeam 73 are connected to the two uprights 72 . The ends of the first heating module 31 and the second heating module 32 along the conveying direction are connected to the crossbeams 73 of two adjacent support frames 71 , respectively. In this manner, the first heating module 31 and the second heating module 32 are mounted.

[0055] In one embodiment, referring to FIG2 , FIG2 shows a schematic structural diagram of a first temperature measuring mechanism 40 of an embodiment of the present application. The first temperature measuring mechanism 40 also includes a drive assembly 42 connected to the first temperature measuring member 41. The drive assembly 42 is in communication connection with the control mechanism, and the control mechanism is used to control the drive assembly 42 to drive the first temperature measuring member 41 to move toward the direction close to the battery cell after the battery cell is heated by the first heating module 31 adjacent to the second heating module 32 and before it is heated by the second heating module 32 to detect the first temperature of the battery cell. During operation, when the battery cell is heated by the first heating module 31 adjacent to the second heating module 32 and before it is heated by the second heating module 32, the control mechanism controls the drive assembly 42 to drive the first temperature measuring member 41 to move toward the direction close to the battery cell to accurately detect the first temperature of the battery cell. After the temperature measurement is completed, the drive assembly 42 drives the first temperature measuring member 41 to rise back to the designated position.

[0056] Optionally, the first temperature measuring element 41 is a first temperature measuring plate that contacts the battery cell to measure the first temperature of the battery cell. Of course, in other embodiments, the first temperature measuring element 41 may also be other devices with temperature measurement functions, and is not limited thereto.

[0057] Further, referring to Figure 2, the drive assembly 42 includes a first drive member 421, a first elastic member 422 and a first guide rod 423 arranged vertically. Specifically, the extension direction of the first guide rod 423 is the same as the extension direction of the column 72. The first drive member 421 is communicatively connected to the control mechanism, and the power shaft of the first drive member 421 is connected to the adapter plate 424. The adapter plate 424 is provided with a first through hole. The first guide rod 423 passes through the first through hole and can move axially along the first guide rod 423 in the first through hole. The first temperature measuring member 41 is connected to one end of the first guide rod 423 facing the conveying mechanism 20, the first elastic member 422 is sleeved on the first guide rod 423, and the two ends of the first elastic member 422 are respectively connected to the first temperature measuring member 41 and the adapter plate 424.

[0058] Optionally, the first driving member 421 is a first cylinder. Of course, in other embodiments, the first driving member 421 may also be a first linear module, but is not limited thereto.

[0059] During operation, after the battery cell has been heated by the first heating module 31 adjacent to the second heating module 32 and before being heated by the second heating module 32, the control mechanism controls the first driving member 421 to operate. The first driving member 421 drives the adapter plate 424, the first guide rod 423, and the first temperature measuring member 41 to move toward the battery cell until the first temperature measuring member 41 contacts the battery cell. In this way, the first temperature measuring member 41 can detect the first temperature of the battery cell. If the contact force between the first temperature measuring member 41 and the battery cell is too large, the first guide rod 423 moves within the first through hole away from the battery cell, and the first temperature measuring member 41 moves toward the adapter plate 424. This allows the extension of the first temperature measuring member 41 to have a certain degree of flexibility, preventing the first temperature measuring member 41 from scratching the battery cell.

[0060] Of course, in other embodiments, the first guide rod 423 is drivingly connected to the power shaft of the first driving member 421, the extension direction of the first elastic member 422 is the same as the axial direction of the first guide rod 423, and the two ends of the first elastic member 422 are respectively connected to the end of the first guide rod 423 away from the first driving member 421 and the first temperature measuring member 41. In this way, the extension movement of the first temperature measuring member 41 can also have a certain degree of flexibility, preventing the first temperature measuring member 41 from scratching the battery cell.

[0061] 2 , the drive assembly 42 further includes a first linear bearing 425 , which is sleeved on the first guide rod 423 and disposed within the first through hole. Thus, the first linear bearing 425 cooperates with the first guide rod 423 to improve the stability of the movement of the first temperature measuring member 41 .

[0062] 2 , the driving assembly 42 further includes a first sheath 426, which is sleeved on the first elastic member 422. In this manner, the first sheath 426 can protect the first elastic member 422 and prevent the first elastic member 422 from being damaged.

[0063] In one embodiment, referring to Figures 1 and 2 , the power shaft of the first driving member 421 is connected to the middle portion of an adapter plate 424 along the conveying direction. The adapter plate 424 is provided with two first through-holes, spaced apart along the conveying direction and located on either side of the first driving member 421. The driving assembly 42 includes two first guide rods 423 , one end of which passes through the two first through-holes, and the other end of each is connected to the first temperature measuring member 41. This arrangement improves the smooth movement of the first temperature measuring member 41.

[0064] In one embodiment, referring to Figures 1 and 2, two drive assemblies 42 are provided. The two drive assemblies 42 are respectively provided on either side of the first heating module 31 adjacent to the second heating module 32, or the two drive assemblies 42 are respectively provided on either side of the second heating module 32 adjacent to the first heating module 31. The first temperature measuring element 41 is located between the first heating module 31 and the conveying mechanism 20 and is connected to the first guide rods 423 of the two drive assemblies 42. In this way, the first temperature measuring mechanism 40 is properly arranged to avoid motion interference between the first temperature measuring mechanism 40 and other mechanisms and to improve the smoothness of the movement of the first temperature measuring element 41.

[0065] In another embodiment, referring to Figures 1 and 3, a guide rail 11 is provided on the side of the carrier 10 facing the heating mechanism 30, and a guide wheel 411 is provided on the side of the first temperature measuring component 41 facing the carrier 10. The guide wheel 411 cooperates with the guide rail 11 to move the first temperature measuring component 41 toward or away from the carrier 10.

[0066] Furthermore, referring to Figures 1 and 3, the guide rail 11 is provided with a first inclined portion 112, a flat portion 111, and a second inclined portion 113, which are arranged in sequence along the conveying direction. The first inclined portion 112 and the second inclined portion 113 are both inclined from the flat portion 111 toward the carrier 10. The first inclined portion 112 is located outside the carrier 10, and the second inclined portion 113 is located on top of the carrier 10. During operation, when the carrier 10 is conveyed close to the first temperature measuring mechanism 40, the guide wheel 411 contacts the first inclined portion 112, the conveying mechanism 20 continues to convey the carrier 10 forward, and the first temperature measuring element 41 gradually rises under the action of the first inclined portion 112. Then, the conveying mechanism 20 continues to convey the carrier 10 forward, the guide wheel 411 contacts the flat portion 111, and the first temperature measuring element 41 maintains a constant height under the action of the flat portion 111, and the carrier 10 gradually enters below the first temperature measuring element 41. Then, the conveying mechanism 20 continues to convey the carrier 10 forward, the guide wheel 411 contacts the second inclined portion 113, and the carrier 10 enters directly under the first temperature measuring component 41. At the same time, the first temperature measuring component 41 moves toward the carrier 10 under the action of the second inclined portion 113 to detect the first temperature of the battery cell.

[0067] Furthermore, referring to Figures 1 and 3, the first temperature measuring mechanism 40 also includes a compression buffer assembly 43. The compression buffer assembly 43 includes a fixed block 435, a second elastic member 432, and a vertically arranged second guide rod 431. The fixed block 435 is installed on the heating mechanism 30. The fixed block 435 is provided with a second through hole. The second guide rod 431 passes through the second through hole. The first temperature measuring member 41 is connected to one end of the second guide rod 431 facing the conveying mechanism 20. The second elastic member 432 is sleeved on the second guide rod 431, and the two ends of the second elastic member 432 are respectively connected to the fixed block 435 and the first temperature measuring member 41. Alternatively, the extension and contraction direction of the second elastic member 432 is the same as the axial direction of the second guide rod 431, and the two ends of the second elastic member 432 are respectively connected to the first temperature measuring member 41 and the second guide rod 431. During operation, if the contact force between the guide wheel 411 and the guide rail 11 is too large, the second guide rod 431 moves in the second through hole in the direction away from the carrier 10, and the first temperature measuring component 41 moves in the direction close to the fixed block 435. In this way, the extension action of the first temperature measuring component 41 has a certain flexibility, preventing the first temperature measuring component 41 from scratching the battery cell.

[0068] 3 , the compression buffer assembly 43 further includes a second linear bearing 433 , which is sleeved on the second guide rod 431 and disposed in the second through hole, thereby reducing the friction coefficient of the movement of the second guide rod 431 .

[0069] 3 , the compression buffer assembly 43 further includes a second sheath 434, which is sleeved on the second elastic member 432. In this manner, the second sheath 434 can protect the second elastic member 432 and prevent the second elastic member 432 from being damaged.

[0070] In one embodiment, referring to Figures 1 and 3, at least two compression buffer assemblies 43 are provided, all of which are respectively provided on both sides of the first heating module 31 adjacent to the second heating module 32, or all of which are respectively provided on both sides of the second heating module 32 adjacent to the first heating module 31, and the second guide rods 431 of all of the compression buffer assemblies 43 are connected to the first temperature measuring member 41. This arrangement is conducive to improving the smooth movement of the first temperature measuring member 41.

[0071] In this embodiment, referring to Figure 3, four compression buffer assemblies 43 are provided, two of which are provided on one side of the first heating module 31 adjacent to the second heating module 32, and the other two compression buffer assemblies 43 are provided on the other side of the first heating module 31 adjacent to the second heating module 32, and the first temperature measuring component 41 is connected to the second guide rods 431 of the four compression buffer assemblies 43.

[0072] In one embodiment, referring to FIG1 , the battery cell heating device further includes a second temperature measuring mechanism 50, and the second temperature measuring mechanism 50 is used to detect the second temperature of the battery cell after being heated by the last second heating module 32. Specifically, the second temperature measuring mechanism 50 is arranged near the discharge area corresponding to the second heating module 32. The control mechanism is communicated with the second temperature measuring mechanism 50, and the control mechanism is used to judge whether the battery cell is qualified based on the difference between the second temperature and the preset temperature. During operation, the conveying mechanism 20 conveys the carrier 10 to the second heating module 32, and the second heating module 32 heats the battery cell. After the battery cell is heated by the second heating module 32 near the discharge area, the second temperature measuring mechanism 50 detects the second temperature of the battery cell. The controller compares the second temperature with the preset temperature, and determines whether the battery cell to be discharged is qualified.

[0073] In this embodiment, there are multiple first heating modules 31 and only one second heating module 32. Optionally, the first temperature measuring mechanism 40 is located above or to the side of the first heating module 31 adjacent to the second heating module 32, and correspondingly, the second temperature measuring mechanism 50 is located above or to the side of the second heating module 32. Optionally, the first temperature measuring mechanism 40 is located above or to the side of the second heating module 32, and the second temperature measuring mechanism 50 is also located above or to the side of the second heating module 32; alternatively, when both the first temperature measuring mechanism 40 and the second temperature measuring mechanism 50 are located above or to the side of the second heating module 32, the first temperature measuring mechanism 40 and the second temperature measuring mechanism 50 are the same temperature measuring mechanism.

[0074] Specifically, if the battery cell is within the preset temperature range, it is transported to the next process. If the second temperature is higher than the preset temperature, the battery cell is rejected as defective. If the second temperature is lower than the preset temperature, the battery cell is transferred to a buffer area and awaits re-processing. This improves the subsequent pass rate of hot pressing and shaping of the battery cells and reduces the scrap rate of the battery cells.

[0075] It should be noted that the structure of the second temperature measuring mechanism 50 may refer to the structure of the first temperature measuring mechanism 40 , and will not be described in detail here.

[0076] In one embodiment, referring to FIG1 , the battery cell heating device further includes a plurality of material detection mechanisms 60, and the plurality of material detection mechanisms 60 are respectively arranged in a one-to-one correspondence with the first heating module 31 and the second heating module 32. The material detection mechanism 60, the conveying mechanism 20, and the heating mechanism 30 are respectively connected to the control mechanism for communication. When the material detection mechanism 60 detects the battery cell, the control mechanism controls the conveying mechanism 20 to stop running for a preset time, and controls the first heating module 31 or the second heating module 32 corresponding to the material detection mechanism 60 to heat for the preset time. When the material detection mechanism 60 does not detect the battery cell, the first heating module 31 or the second heating module 32 corresponding to the material detection mechanism 60 stops heating. In this way, the material detection mechanism 60 detects whether there are battery cells at the positions corresponding to the first heating module 31 and the second heating module 32, and controls the conveying mechanism 20 and the heating mechanism 30 to operate.

[0077] Furthermore, referring to Figures 1 and 4, the material detection mechanism 60 also includes a fixed bracket 61, an adjustment bracket 62 and a position sensor 63. The fixed bracket 61 is installed on the equipment bracket 70, and the position sensor 63 is installed on the adjustment bracket 62. The fixed bracket 61 is provided with a strip hole 611 extending along its height direction, and the adjustment bracket 62 is provided with a fixing hole, or the fixed bracket 61 is provided with a fixing hole, and the adjustment bracket 62 is provided with a strip hole 611 set along its height direction, and a fixing member 64 is provided in the fixing hole and the strip hole 611. Optionally, the fixing member 64 is a screw, a bolt, etc. Loosen the fixing member 64, pull the adjustment bracket 62 upward or push it downward, and the fixing member 64 moves upward or downward accordingly in the strip hole 611 to adjust the height of the position sensor 63. After the adjustment bracket 62 moves to the preset height, tighten the fixing member 64 so that the adjustment bracket 62 is fixed relative to the fixed bracket 61. In this way, the height of the position sensor 63 is adjustable, so that the position sensor 63 can detect battery cells of different models and sizes.

[0078] Optionally, the position sensor 63 is a laser position sensor 63. Of course, in other embodiments, the material presence detection mechanism 60 further includes a transmitting component and a receiving component. Each first heating module 31 and second heating module 32 is provided with a transmitting component and a receiving component on both sides along the conveying direction. The transmitting component and the receiving component cooperate to detect the presence of battery cells. The transmitting component and the receiving component each include a fixed bracket 61, an adjustment bracket 62, and a position sensor 63. For specific structures, refer to the structure of the material presence detection mechanism 60 described above.

[0079] Referring to Figures 5 and 6, Figure 5 shows a flow chart 1 of a battery cell heating method according to an embodiment of the present application, and Figure 6 shows a flow chart 2 of a battery cell heating method according to an embodiment of the present application. The battery cell heating method according to an embodiment of the present application provides a battery cell heating device according to any of the above embodiments. The battery cell heating method includes:

[0080] S10 , transporting the battery cells through the first heating module 31 , where the first heating module 31 heats the battery cells.

[0081] S20 , detecting a first temperature of the battery cell after being heated by the first heating module 31 adjacent to the second heating module 32 and before being heated by the second heating module 32 .

[0082] S30 , comparing the first temperature with a preset temperature, and adjusting the heating power of the second heating module 32 according to the difference between the first temperature and the preset temperature.

[0083] S40 , the second heating module 32 heats the battery cell according to the heating power.

[0084] In this way, the heating temperature of the battery cell can be guaranteed, the pass rate of subsequent battery cell hot pressing and shaping can be improved, and the scrap rate of the battery cell can be reduced.

[0085] In one embodiment, after step S40, the method further includes:

[0086] S50, detecting a second temperature of the battery cell to be discharged after being heated by the second heating module 32;

[0087] S60: Compare the second temperature with the preset temperature to determine whether the battery cell is qualified.

[0088] Specifically, in step S60, it includes:

[0089] S61: If the battery cell is within a preset temperature range, transport the battery cell to the next process.

[0090] S62: If the second temperature is higher than the preset temperature, the battery cell is discharged as a defective product.

[0091] S63: If the second temperature is lower than the preset temperature, transfer the battery cell to a buffer area and wait for re-use.

[0092] In this way, the qualification rate of subsequent hot pressing and shaping of battery cells can be improved and the scrap rate of battery cells can be reduced.

[0093] In one embodiment, referring to Figures 7 to 12, the first heating module 31 and the second heating module 32 form a group of heating units 33, and multiple groups of heating units 33 are provided along the conveying direction of the conveying mechanism 20. In order to ensure the efficiency of the assembly line processing while further making the temperature of the battery cell 12 controllable to reduce the scrap rate, this embodiment proposes a further improved battery cell 12 heating device. The battery cell 12 heating device is provided with multiple groups of heating units 33 along the conveying direction of the conveying mechanism 20. Each heating unit 33 includes a first heating module 31 and a second heating module 32, wherein the second heating module 32 is located at the rear end of the first heating module 31. Each heating unit 33 is first heated by the first heating module 31 and then the first temperature is obtained by the first temperature measuring element 41. The heating power of the second heating module 32 is then adjusted by the control mechanism. After the heating power of the second module is adjusted, the battery cell 12 is reheated to adjust the temperature of the battery cell 12. Then, multiple heating units 33 arranged along the conveying direction of the conveying mechanism 20 heat the battery cells 12 step by step. Before reaching the second temperature measuring mechanism 50, the temperature of the battery cells 12 will be controlled more accurately and more easily within the preset temperature range, thereby reducing the scrap rate of the battery cells 12.

[0094] In actual use, it was found that the battery cells 12 often have a fluffy oval shape. If the heating device can apply a certain pressure to the battery cells 12 when heating the battery cells 12, the heating efficiency of the battery cells 12 can be improved. At the same time, during the pre-pressing process of the battery cells 12, the pre-shaping of the battery cells 12 through the pressing action can also increase the yield of the battery cells 12 after hot pressing. Therefore, an embodiment is proposed including the following design: Referring to Figures 7 to 14, the first heating module 31 and the second heating module 32 each include a frame 34 and a shaping assembly 35. The frame 34 is provided with a support plate 341, and the shaping assembly 35 is provided on the support plate 341. The shaping assembly 35 heating module includes a first pressing portion 351 and a second pressing portion 352. The first pressing portion 351 and the second pressing portion 352 can be close to each other to pre-press the two sides of the battery cell 12. The first pressing portion 351 and the second pressing portion 352 are both provided with heating elements 353 so that the first pressing portion 351 and the second pressing portion 352 can heat the battery cell 12. The shaping assembly 35 is supported by the frame 34. The first pressing portion 351 is arranged above the shaping assembly 35, and the second pressing portion 352 is arranged below the shaping assembly 35, and the two are arranged facing each other. A heating element 353 is provided in both the first pressing portion 351 and the second pressing portion 352. The heating element 353 is provided with an induction coil, which enables contactless heating of the battery cell 12. The first pressing portion 351 and the second pressing portion 352 simultaneously press the battery cell 12 while heating it, thereby improving the heating efficiency of the battery cell 12 and performing a certain degree of pre-shaping.

[0095] Further, referring to Figures 7 to 14, a first temperature measuring member 41 is provided on the first pressing portion 351. The first temperature measuring member 41 includes a mounting member 44 and a first temperature sensor 413. The mounting member 44 is a heat-insulating structure connected to the heating device. The first temperature sensor 413 is connected to the mounting member 44. The first temperature sensor 413 is used to thermally connect to the battery cell 12 to detect the temperature of the battery cell 12. In actual production, it has been found that detecting the temperature of the battery cell 12 through a non-contact method may result in inaccurate first temperature. In order to more accurately obtain the actual temperature of the battery cell 12, the design uses a first temperature measuring member 41 that can be closer to the battery cell 12 to solve this problem. Since the first pressing part 351 is connected to the lifting assembly 37 and moves up and down under the action of the lifting assembly 37 to achieve the pressing action, if the first temperature measuring member 41 is set on the second pressing part 352, the second pressing part 352 does not move, and the contact time with the battery cell 12 is longer than that of the first pressing part 351, the first temperature measuring member 41 is easily heated up due to heat conduction from the battery cell 12, resulting in inaccurate temperature measurement. Therefore, it is necessary to set the first temperature measuring member 41 on the first pressing part 351. The first temperature measuring member 41 is provided with a mounting member 44 and a first temperature sensor 413. Taking Figure 11 as an example, the first temperature sensor 413 is mounted on the mounting member 44. When the first pressing part 351 is pressed down onto the battery cell 12, the mounting member 44 and the first temperature sensor 413 are in direct contact with the battery cell 12. The direct contact of the first temperature sensor 413 with the battery cell 12 can obtain the most accurate surface temperature data of the battery cell 12. The mounting member 44 is a heat-insulating structure that can reduce the heat loss of the battery cell 12 caused by contact and pressing with the battery cell 12, improve the heating efficiency, and reduce resource waste. When the first pressing portion 351 rises, the mounting member 44 and the first temperature sensor 413 are separated from the surface of the battery cell 12. At this time, the first temperature sensor 413 can dissipate heat to reduce the heat conducted from the battery cell 12 to the first temperature sensor 413, which affects the temperature measurement effect. If heat is not dissipated, the temperature increase of the first temperature sensor 413 will cause the first temperature obtained subsequently to be inaccurate. After the first temperature sensor 413 obtains the first temperature, the second heating module 32 will adjust the heating power based on the first temperature through the connection with the control mechanism.

[0096] In one embodiment, referring to Figures 10 and 11, the mounting member 44 has an insulating cavity 441, and the first temperature sensor 413 is located on the side of the insulating cavity 441 away from the heating member 353. The heating member 353 is provided with components for heating, which can be used to heat the battery cell 12 through an induction coil, or to heat the battery cell 12 through a resistance wire or an electric heating film. In order to reduce the influence of the components of the heating battery cell 12 on the first temperature sensor 413 during the heating process, a thermal insulation cavity 441 is provided in this embodiment. The thermal insulation cavity 441 is provided on one side of the first temperature sensor 413 and the heating member 353. The conduction between the heating body and the first temperature sensor 413 is cut off by the thermal insulation cavity 441, so that the first temperature sensor 413 is less affected by the heating member 353, thereby making the temperature measurement of the first temperature sensor 413 more accurate.

[0097] Preferably, referring to Figure 11, an induction coil is used in the heating element 353 to generate a magnetic field to heat the battery cell 12. Compared with the heating method under the prior art, the use of the induction coil in this application can more flexibly control the heating of the battery cell 12, so that the battery cell 12 is closer to the preset temperature when leaving the battery cell 12 heating device.

[0098] In one embodiment, referring to Figures 7 and 9, the heating module further includes a lifting support frame 36, wherein the first pressing portion 351 is liftably disposed on the lifting support frame 36, and the second pressing portion 352 is fixedly disposed on the lifting support frame 36. The first heating module 31 and the second heating module 32 include a lifting assembly 37, which is used to drive the first pressing portion 351 to move upward and downward. In order to ensure that the downward pressure of the first pressing portion 351 is more balanced across the surface in contact with the battery cell 12, a lifting support frame 36 is provided to connect the first pressing portion 351, and then the lifting support frame 36 is connected to the lifting assembly 37, and the lifting movement of the first pressing portion 351 is controlled by the lifting assembly 37. Because the lifting assembly 37 and the first pressing portion 351 are indirectly connected via the lifting support frame 36, the lifting movement of the first pressing portion 351 is more stable than when the lifting assembly 37 is directly connected to the lifting assembly 37 and driven by the lifting assembly 37. The lifting assembly 37 can be driven by an electric cylinder 9331 or a pneumatic cylinder and used in conjunction with a linear slide rail to further improve the stability of the lifting movement of the first pressing portion 351.

[0099] In one embodiment, referring to Figures 7 and 12 , the battery cell 12 heating device further includes a second temperature measuring mechanism 50 , which is used to detect the second temperature of the battery cell 12 after being heated by the last second heating module 32 . A control mechanism is in communication with the second temperature measuring mechanism 50 and is used to determine whether the battery cell 12 is qualified based on the difference between the second temperature and a preset temperature. The second temperature refers to the temperature of the battery cell 12 after being heated by the last heating unit 33 . A second temperature measuring mechanism 50 is provided at the end of the battery cell 12 heating device to ensure that the temperature of the battery cell 12 passing through the battery cell 12 heating device is qualified. The second temperature measuring mechanism 50 includes an upper temperature measuring unit and a lower temperature measuring unit, each of which is equipped with a plurality of second temperature sensors 53 , which are non-contact temperature sensors. The plurality of second temperature sensors 53 detect the temperatures of the upper and lower surfaces of the battery cell 12 to ensure accurate temperature detection of the battery cell 12. The second temperature sensor 53 uses a non-contact temperature sensor, which can prevent the heat generated by the battery cell 12 from causing the temperature of the second temperature sensor 53 to rise, thereby causing inaccurate temperature measurement results.

[0100] In the above-described embodiment, the carrier 10 is provided with a plurality of cell 12 placement frames arranged in parallel to accommodate the cells 12. The cell 12 placement frames are the same size as the cells 12 after pre-stressing by the cell heating device. The cell 12 placement frames not only position the cells 12 but also prevent the pre-stressing from causing excessive, irreversible deformation of the cells 12, which could result in waste. Accordingly, a plurality of heating mechanisms 30, control mechanisms, and second temperature measurement mechanisms 50 are also arranged in parallel to achieve efficient production.

[0101] In one embodiment, the first temperature of the battery cell 12 can be detected by placing a non-contact first temperature sensor 413 in the electromagnetic heating lower module or by placing a temperature detection plate in the battery cell 12 carrier 10. Compared with the existing technology, this is more convenient for program design and control of the control mechanism.

[0102] The present application also discloses a battery cell heating process method, which uses the above-mentioned battery cell heating device and is illustrated in conjunction with the battery cell heating process of FIG13 :

[0103] SA1. The battery cells are loaded at the loading position of the battery cell heating device and placed in the carrier.

[0104] If the battery cell heating device uses an assembly line conveyor belt linked to the upper and lower production equipment, the battery cell is directly placed in the carrier.

[0105] SA2: The battery cell moves with the carrier to the first heating module of the first heating unit. The first pressing portion of the first heating module presses down, and when the first pressing portion and the second pressing portion press the battery cell, the battery cell is heated by the heating element. Simultaneously, the first temperature measuring mechanism on the first pressing portion measures the temperature of the battery cell to obtain a first temperature.

[0106] SA3: The control mechanism controls the heating power of the second heating module based on the first temperature. The battery cell moves with the carrier to the second heating module. The battery cell is heated by the heating element while the first and second pressing parts press the battery cell together. Simultaneously, the first temperature measuring mechanism on the first pressing part measures the temperature of the battery cell to obtain a new first temperature. At this point, the second heating module becomes the first heating module of the next heating unit.

[0107] The battery cell will continue to move with the carrier. If the battery cell does not reach the front of the second temperature measuring mechanism, the above SA3 steps will be repeated. If the battery cell reaches the front of the second temperature measuring mechanism, the following steps will be performed:

[0108] SA4: The battery cell moves with the carrier to the second temperature measuring mechanism, which detects whether the current battery cell temperature is qualified.

[0109] SA5, battery cell blanking;

[0110] Furthermore, in order to distinguish qualified and unqualified cells, the following steps are also included:

[0111] SA51: If the battery cell passes the test, the battery cell will be unloaded at the unloading position;

[0112] SA52: If the battery cell fails the test, the battery cell will be removed from the scrap position;

[0113] Through the above method and steps, accurate temperature control of battery cell heating can be achieved, reducing the probability of battery cell scrapping after heating and pre-pressing.

[0114] During the battery cell processing, in order to ensure the performance of the battery cells, the temperature required for processing needs to be strictly controlled. For example, in some battery cell shaping equipment, a temperature sensor is required to detect the temperature of the battery cells. In some existing technologies, the battery cells are heated by a heating plate, and the temperature of the heating plate is usually detected to determine the temperature of the battery cells. However, the temperature detected in this way deviates from the actual temperature of the battery cells, which leads to low performance of the processed battery cells.

[0115] It should be noted that the shaping head 354 mentioned below is equivalent to a single pressing portion, for example, equivalent to the first pressing portion 351 mentioned above, or equivalent to the second pressing portion 352 mentioned above.

[0116] Based on the above problems, the first embodiment of the present application proposes a shaping head 354. Referring to Figures 14 and 15, Figure 14 is a structural schematic diagram of a shaping head in the first embodiment of the present application, and Figure 15 is a cross-sectional view of Figure 14. The shaping head 354 of this embodiment includes: a single heating module 8 and a first temperature measuring component 41.

[0117] The single-cell heating module 8 includes a support platform 8110 and a heating element 353. The heating element 353 is, for example, a heating rod, a heating resistor, or an induction coil. The heating element 353 is connected to the support platform 8110 and is used to heat the battery cell. The first temperature measuring element 41 includes a mounting member 44 and a first temperature sensor 413. The mounting member 44 is a heat-insulating structure, such as a rock wool insulation board, a glass wool insulation board, or a rubber-plastic insulation board. The mounting member 44 is connected to the single-cell heating module 8. The first temperature sensor 413 is connected to the mounting member 44. The first temperature sensor 413 is used to connect to the battery cell through heat conduction to detect the temperature of the battery cell. For example, the first temperature sensor 413 is directly connected to the battery cell, or the first temperature sensor 413 is connected to the battery cell through a heat-conducting structure (such as the heat-conducting member 8230 described below) so that the temperature of the battery cell is transferred to the first temperature sensor 413. Specifically, since the mounting member 44 is a heat-insulating structure, the impact of the single-unit heating module 8 on the first temperature sensor 413 can be reduced, and at the same time, heat can be prevented from being lost quickly through the mounting member 44, thereby improving the detection accuracy of the first temperature sensor 413 on the battery cell temperature, thereby improving the performance of the battery cell.

[0118] It should be noted that, since the mounting member 44 is a heat-insulating structure, in order to ensure that the single-unit heating module 8 heats the battery cell normally, in some embodiments, the heating member 353 is a heating rod or an electric thermal resistance wire, and the heating plate or the electric thermal resistance wire needs to transfer heat with the battery cell to heat the battery cell. Therefore, the support platform 8110 has a second receiving groove, and the first temperature measuring member 41 is arranged in the second receiving groove. Thus, when the shaping head 354 of this embodiment is used for battery cell shaping, the support platform 8110 can be in direct contact with the battery cell to heat the battery cell. However, it is understandable that, in this manner, if the first temperature measuring member 41 protrudes from the second receiving groove, the support platform 8110 will not be able to contact the battery cell, thereby affecting the heating of the battery cell. If the first temperature measuring member 41 is located in the second receiving groove and the distance between the first temperature measuring member 41 and the opening of the second receiving groove is greater than 0, the first temperature measuring member 41 will not be able to contact the battery cell, thereby reducing the temperature detection accuracy. Therefore, in order to ensure that the first temperature measuring member 41 can contact the battery cell and heat the battery cell normally, it is necessary to ensure that the surface of the first temperature measuring member 41 that is used to contact the battery cell (such as the surface of the mounting member 44 or the surface of the temperature conducting member 8230 in the embodiment below) needs to be flush with the surface of the support platform 8110. Therefore, higher requirements are placed on the processing accuracy of the support platform 8110 and the installation accuracy of the first temperature measuring member 41, which will lead to an increase in the cost of the shaping head 354. Based on this, in some embodiments, the single-cell heating module 8 includes a heating element 353, which is an induction coil (as shown in Figure 15). The induction coil is used to connect to an external variable power supply (such as an alternating power supply) to generate a variable magnetic field, thereby generating eddy currents inside the battery cell to generate heat, thereby achieving non-contact heating of the battery cell. As a result, there is no need for the support platform 8110 to contact the battery cell, which reduces the processing accuracy of the support platform 8110 and the installation accuracy of the first temperature measuring component 41, thereby reducing the cost of the shaping head 354 of this embodiment.

[0119] Furthermore, based on the above embodiments, the support platform 8110 and / or the mounting member 44 are made of insulating material, so the changing magnetic field will not generate eddy currents inside the support platform 8110 and the mounting member 44, that is, the magnetic energy will not be converted into electrical energy in the support platform 8110 and the mounting member 44, thereby reducing the magnetic energy consumption and then reducing the power consumption of the power supply to save manufacturing costs.

[0120] In addition, it can be understood that when the support platform 8110 and the mounting member 44 are both made of insulating materials, only the battery cell will generate heat during the battery cell shaping process, thereby improving the detection accuracy of the battery cell temperature by the first temperature sensor 413.

[0121] 15 and 16 , FIG16 is an enlarged schematic diagram of area A in FIG15 . In some embodiments, the mounting member 44 has an insulating cavity 441, and the first temperature sensor 413 is located on a side of the insulating cavity 441 facing away from the cell heating module 8. Specifically, for example, the mounting member 44 includes a first insulating plate 8213 and a second insulating plate 8214. The first insulating plate 8213 is connected to the second insulating plate 8214, defining the insulating cavity 441 therebetween. The first temperature sensor 413 is connected to the first insulating plate 8213, and the second insulating plate 8214 is connected to the cell heating module 8. Specifically, for example, the first thermal insulation board 8213 has a first thermal insulation groove, and the second thermal insulation board 8214 is connected to the first thermal insulation board 8213 and covers the first thermal insulation groove to define the thermal insulation cavity 441, or the second thermal insulation board 8214 has a second thermal insulation groove 82141, and the first thermal insulation board 8213 is connected to the second thermal insulation board 8214 and covers the second thermal insulation groove 82141 to define the thermal insulation cavity 441, or the first thermal insulation board 8213 has a first thermal insulation groove, and the second thermal insulation board 8214 has a second thermal insulation groove 82141. The first thermal insulation board 8213 has a surface with a first thermal insulation groove, which is connected to the surface of the second thermal insulation board 8214 having a second thermal insulation groove 82141 to define an insulation cavity 441, thereby forming air insulation between the single-unit heating module 8 and the first temperature sensor 413. It can be understood that the thermal conductivity of air is approximately 0.026W / (mK), and its thermal conductivity is relatively low, which can provide good thermal insulation and heat preservation effects, and can effectively prevent heat exchange with the thermal insulation board, thereby reducing heat loss and further improving the detection accuracy of the battery cell temperature.

[0122] Referring to Figures 15 and 16 , in some embodiments, the side of the first thermal insulation plate 8213 facing the second thermal insulation plate 8214 further comprises a wiring groove 82131. This wiring groove 82131 is used to allow wires to pass through and connect to the first temperature sensor 413, effectively preventing the wires from being damaged by pressure. Furthermore, the wiring groove 82131 is located on the side of the first thermal insulation plate 8213 facing the second thermal insulation plate 8214. That is, during the cell shaping process, the wiring groove 82131 is located on the side of the first thermal insulation plate 8213 facing away from the cell. This reduces the temperature of the wires, thereby increasing their service life and reducing the maintenance cost of the shaping head 354 of this embodiment.

[0123] In some embodiments, the mounting member 44 further includes a support column 8216. One end of the support column 8216 is connected to the wall of the insulation cavity 441 near the first temperature sensor 413, and the other end is connected to the wall of the insulation cavity 441 facing away from the first temperature sensor 413. This enhances the strength of the mounting member and prevents collapse of the insulation cavity 441. For example, as shown in FIG. 16 , the second insulation board 8214 includes a second insulation groove 82141. The inner wall of the second insulation groove 82141, which is opposite to the first insulation board 8213, also includes a boss 82142. When the second insulation board 8214 is connected to the first insulation board 8213, the boss 82142 abuts the first insulation board 8213.

[0124] 16 , in some embodiments, the first temperature sensor 413 has a temperature measuring surface 8221, the mounting member 44 has a mounting groove 8211 and a notch 82112 connected to the mounting groove 8211, the first temperature sensor 413 is disposed in the mounting groove 8211, the temperature measuring surface 8221 is flush with the surface of the notch 82112 of the mounting member 44, and the temperature measuring surface 8221 is used to contact the battery cell. Specifically, the first temperature sensor 413 directly contacts the surface of the battery cell without the need for other heat conducting members for heat transfer (such as the heat conducting member 8230 described below), which can improve the detection accuracy of the battery cell temperature by the first temperature sensor 413. However, it is understandable that the size of the first temperature sensor 413 is relatively small relative to the size of the battery cell. Therefore, during the battery cell shaping process, if the first temperature sensor 413 protrudes from the mounting groove 8211, the first temperature sensor 413 will form an indentation on the surface of the battery cell, or even damage the first temperature sensor 413. However, if the first temperature sensor 413 is located inside the mounting groove 8211 and the distance from the groove is greater than 0, the battery cells will not be able to contact each other during the battery cell shaping process. Based on this, in order to ensure that the first temperature sensor 413 can contact the battery cell and does not form an indentation on the surface of the battery cell, this embodiment makes the temperature measuring surface 8221 of the first temperature sensor 413 flush with the surface where the groove 82112 of the mounting part 44 is located. Therefore, during the battery cell shaping process, the battery cell contacts the surface where the mounting part 44 is located and abuts against the first temperature sensor 413.

[0125] As can be seen from the above embodiments, in order to ensure that the first temperature sensor 413 can contact the battery cell and does not form an indentation on the surface of the battery cell, it is necessary to ensure that the temperature measuring surface 8221 of the first temperature sensor 413 is flush with the surface where the notch 82112 of the mounting member 44 is located. This places higher requirements on the processing accuracy of the mounting groove 8211 and the installation accuracy of the first temperature sensor 413, which will lead to increased costs. Based on this, in some embodiments, the first temperature measuring member 41 also includes a thermal conductive member 8230. Referring to Figure 17, Figure 17 is a cross-sectional view of another shaping head according to the first embodiment of the present application. The first temperature sensor 413 is connected to the thermal conductive member 8230, and the surface of the thermal conductive member 8230 facing away from the first temperature sensor 413 is used to contact the battery cell. Specifically, during use, the size of the battery cell to be shaped can be made no larger than the size of the thermal conductive part 8230. For example, if the battery cell is a square battery cell, the length and width of the thermal conductive part 8230 are no less than the length and width of the battery cell, thereby reducing the pressure on the battery cell, thereby preventing indentations on the surface of the battery cell, and ensuring heat transfer between the battery cells. There is no need to make the temperature measuring surface 8221 of the first temperature sensor 413 flush with the surface where the notch 82112 of the mounting part 44 is located as in the above embodiment, thereby reducing the cost of the equipment.

[0126] Based on the above embodiment, the thickness of the thermal conductive member 8230 is 0.1 mm to 1 mm. Specifically, it is understood that heat is transferred between the battery cell and the first temperature sensor 413 through the thermal conductive member 8230. Therefore, when the thermal conductive member 8230 is thick, the heat transfer capacity between the battery cell and the first temperature sensor 413 is reduced. When the thermal conductive member 8230 is too thin, it increases the manufacturing difficulty and may also cause the thermal conductive member 8230 to be easily broken. Therefore, in this embodiment, the thermal conductive member 8230 is set within an appropriate range, that is, the thickness of the thermal conductive member 8230 is 0.1 mm to 1 mm.

[0127] In some embodiments, a clearance hole is defined between the thermal conductive member 8230 and the mounting member 44. The first temperature sensor 413 is connected to the thermal conductive member and located within the clearance hole, thereby preventing the first temperature sensor 413 from being crushed. Specifically, for example, the first temperature sensor 413 may have a clearance groove (such as the mounting groove 8211 in the above embodiment), and the inner wall of the clearance groove and the surface of the thermal conductive member 8230 may form a clearance hole. Alternatively, the surface of the thermal conductive member 8230 may have a clearance groove, and the inner wall of the clearance groove and the surface of the mounting member 44 may define a clearance hole.

[0128] Referring to Figures 18 and 19, Figure 18 is a cross-sectional view of another shaping head according to the first aspect of the present application, and Figure 19 is an enlarged view of area A in Figure 18. In some embodiments, the mounting member 44 also has a first accommodating groove 8215, and the size and shape of the first accommodating groove 8215 are adapted to the size and shape of the thermal conductor 8230. The thermal conductor 8230 is arranged in the first accommodating groove 8215, so that the mounting member 44 can play a role in thermal insulation for the thermal conductor, thereby reducing heat loss through the thermal conductor 8230.

[0129] Referring to Figure 20, Figure 20 is a schematic structural diagram of the battery cell shaping device of the second embodiment of the present application. The battery cell shaping device of the second embodiment includes: the shaping head 354 described in the first embodiment, two shaping heads 354 are provided, the two shaping heads 354 are distributed in the vertical direction, and at least one shaping head 354 can move back and forth in the vertical direction, thereby achieving the flattening of the battery cell surface. Specifically, the first temperature sensor 413 in the shaping head 354 is connected to the mounting member 44 for thermal conduction connection with the battery cell to detect the temperature of the battery cell, wherein the mounting member 44 is a heat-insulating structure, thereby reducing the influence of the single-unit heating module 8 on the first temperature sensor 413, thereby improving the detection accuracy of the first temperature sensor 413 on the battery cell temperature, thereby improving the performance of the battery cell.

[0130] It should be noted that, since this embodiment adopts all the technical features of the shaping head 354 of the first embodiment, this embodiment has at least all the beneficial effects brought by the first embodiment, which will not be repeated here.

[0131] An embodiment of the present application proposes a battery cell heating and pre-shaping device, as shown in FIG21 , comprising: a support frame 9100 and a shaping component 35 . The shaping component 35 is carried on the support frame 9100 , and the shaping component 35 is used to heat and pre-press the battery cell 12 .

[0132] It is understood that in some embodiments of the present application, referring to FIG. 21 , a plurality of support plates 341 are provided on the support frame 9100, and the plurality of support plates 341 are spaced apart along the height direction of the support frame 9100. There are a plurality of shaping assemblies 35, and the plurality of shaping assemblies 35 are fixedly disposed on the plurality of support plates 341 in a one-to-one correspondence, thereby enabling the battery cell heating and pre-shaping device to pre-shape multiple battery cells 12 simultaneously, thereby improving the production efficiency of the battery cells 12.

[0133] It can be understood that in some embodiments of the present application, referring to Figure 21, the shaping component 35 includes a first pressing portion 351 and a second pressing portion 352. The first pressing portion 351 can be raised and lowered on the support frame 9100, and the second pressing portion 352 is fixed on the support plate 341. When the battery cell 12 is placed between the first pressing portion 351 and the second pressing portion 352, the first pressing portion 351 and the second pressing portion 352 can be close to each other to pre-press both sides of the battery cell 12.

[0134] It can be understood that in some embodiments of the present application, referring to Figure 21, the battery cell heating and pre-shaping device includes a lifting component, which is used to drive the first pressing part 351 to rise and fall relative to the second pressing part 352, thereby pre-pressing the battery cell 12.

[0135] It can be understood that in some embodiments of the present application, referring to Figure 21, the lifting assembly includes a guide rail 9310, a sliding frame 9320 and a driving member. The guide rail 9310 is fixedly arranged on the support frame 9100 and is arranged along the height direction of the support frame 9100. The sliding frame 9320 is arranged along the height direction of the support frame 9100. The sliding frame 9320 slides and cooperates with the guide rail 9310. The first pressing portion 351 is fixedly connected to the sliding frame 9320. The driving member can drive the sliding frame 9320 to slide on the guide rail 9310. When the battery cell 12 needs to be pre-pressed, the sliding frame 9320 is driven by the driving member to slide on the guide rail 9310, thereby driving the first pressing portion 351 to descend, so that the first pressing portion 351 and the second pressing portion 352 are close to each other and respectively abut against the two sides of the battery cell 12, thereby applying pressure to the battery cell 12 to achieve pre-pressing of the battery cell 12.

[0136] It will be understood that in some embodiments of the present application, referring to FIG. 21 , the driving member includes an electric cylinder 9331, the cylinder body of the electric cylinder 9331 being fixedly mounted on the top of the support frame 9100, and the telescopic shaft of the electric cylinder 9331 being fixedly connected to the top of the sliding frame 9320. When pre-compression of the battery cell 12 is required, the telescopic shaft of the electric cylinder 9331 is extended and retracted to drive the sliding frame 9320 to slide on the guide rail 9310, thereby driving the first pressing portion 351 downward, so that the first pressing portion 351 and the second pressing portion 352 approach each other and respectively abut against the sides of the battery cell 12, thereby applying pressure to the battery cell 12 to achieve pre-compression of the battery cell 12.

[0137] In this embodiment, referring to Figure 21, multiple first pressing parts 351 are fixedly connected to the sliding frame 9320 and are spaced apart along the length direction of the sliding frame 9320, so that the electric cylinder 9331 drives the sliding frame 9320 to slide on the guide rail 9310. The sliding frame 9320 can drive the multiple first pressing parts 351 to descend at the same time, and then pre-press the multiple battery cells 12 at the same time, thereby improving the production efficiency of the battery cells 12.

[0138] It can be understood that in some embodiments of the present application, heating elements are provided in the first pressing part 351 and the second pressing part 352. While the first pressing part 351 and the second pressing part 352 pre-press the battery cell 12, the upper and lower sides of the battery cell 12 can be heated by the heating element, thereby achieving the pre-pressing of the battery cell 12 while heating the battery cell 12, shortening the pre-shaping time and improving the production efficiency of the battery cell 12.

[0139] It should be noted that in this embodiment, the heating element is a heating coil disposed in the first pressing portion 351 and the second pressing portion 352. The heating coil in the first pressing portion 351 and the second pressing portion 352 can generate a heating state of an alternating magnetic field, thereby heating the battery cell 12 placed between the first pressing portion 351 and the second pressing portion 352. In other embodiments, the heating element can also be a heating plate or infrared heating.

[0140] It can be understood that in some embodiments of the present application, with reference to Figures 21 and 22, a limit block 9400 is fixedly provided on the guide rail 9310, a screw hole is provided on the top of the limit block 9400, and a limit screw 9500 is threadedly connected in the screw hole. The limit screw 9500 is located below the sliding frame 9320 to limit the travel range of the sliding frame 9320, so that when the electric cylinder 9331 drives the sliding frame 9320 to slide on the guide rail 9310, when the first pressing portion 351 contacts the guide rail 9310, the limit screw 9500 is pressed against the guide rail 9310. When pressed on the battery cell 12, the sliding frame 9320 abuts against the limiting screw 9500, thereby preventing the sliding frame 9320 from continuing to descend and causing the first pressing part 351 to exert excessive pressure on the battery cell 12; at the same time, according to the different thicknesses of different battery cells 12, the limiting screw 9500 can cooperate with the screw hole thread to adjust the relative position between the limiting screw 9500 and the guide rail 9310, so that the battery cell heating pre-shaping device can adapt to various types of battery cells 12 and protect them.

[0141] It can be understood that in some embodiments of the present application, referring to Figures 21 and 23, the first pressing portion 351 is provided with a first pressing surface 9211 for abutting one side of the battery cell 12, and the second pressing portion 352 is provided with a second pressing surface 9221 for abutting the other side of the battery cell 12. The first pressing portion 351 is lowered so that the first pressing portion 351 and the second pressing portion 352 are close to each other, so that the first pressing surface 9211 abuts one side of the battery cell 12, and the second pressing surface 9221 abuts the other side of the battery cell 12, thereby achieving pre-compression of the battery cell 12.

[0142] It can be understood that in some embodiments of the present application, referring to Figures 21 and 23, a pressure sensor 9600 is provided at the bottom of the second pressing part 352. When the first pressing part 351 and the second pressing part 352 pre-press the battery cell 12, the pressure of the pre-pressing is sensed by the pressure sensor 9600, and the sensing signal is fed back to the controller. The controller controls the start or stop of the electric cylinder 9331, so that the pressure required for shaping the battery cell 12 can be fed back through the pressure sensor 9600, thereby making the pre-pressing effect better.

[0143] It can be understood that in some embodiments of the present application, referring to Figures 21 and 23, the second pressing surface 9221 is provided with a first temperature measuring component 41, which is used to measure the temperature of the battery cell 12 when it is heated, so as to reduce the situation where the pre-shaping effect is poor due to insufficient heating or overheating of the battery cell 12.

[0144] The implementation principle of the embodiment of the present application is: when the battery cell 12 needs to be pre-pressed, the telescopic shaft of the electric cylinder 9331 is extended and retracted to drive the sliding frame 9320 to slide on the guide rail 9310, thereby driving the first pressing part 351 to descend, so that the first pressing part 351 and the second pressing part 352 are close to each other and respectively abut against the two sides of the battery cell 12, thereby applying pressure to the battery cell 12 to achieve pre-pressing of the battery cell 12.

[0145] When the battery cell 12 needs to be heated, the heating coils in the first pressing part 351 and the second pressing part 352 can generate a heating state of an alternating magnetic field, thereby heating the battery cell 12 placed between the first pressing part 351 and the second pressing part 352, thereby achieving pre-pressing of the battery cell 12 while heating the battery cell 12, shortening the pre-shaping time and improving the production efficiency of the battery cell 12.

[0146] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0147] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0148] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0149] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0150] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A battery core heating device, characterized in that: include: A carrier, the carrier being used to carry the battery cell; A conveying mechanism and a heating mechanism, wherein the heating mechanism comprises at least one first heating module and at least one second heating module, wherein the first heating module and the second heating module are arranged along a conveying direction of the conveying mechanism, and the conveying mechanism is used to drive the carrier to pass through the first heating module and the second heating module in sequence; a first temperature measuring mechanism, the first temperature measuring mechanism comprising a first temperature measuring element, the first temperature measuring element being used to detect a first temperature of the battery cell after being heated by the first heating module adjacent to the second heating module and before being heated by the second heating module; as well as A control mechanism is communicatively connected with the first temperature measuring component, and is used for controlling the second heating module to adjust the heating power according to the difference between the first temperature and a preset temperature.

2. The electric core heating device according to claim 1, characterized in that: The first heating module and the second heating module form a group of heating units, and a plurality of groups of the heating units are arranged along the conveying direction of the conveying mechanism.

3. The electric core heating device according to claim 2, characterized in that: The first heating module and the second heating module both include a frame and a shaping component, the frame is provided with a support plate, the shaping component is arranged on the support plate, the shaping component includes a first pressing part and a second pressing part, the first pressing part and the second pressing part can be close to each other to pre-press the two sides of the battery cell, and the first pressing part and the second pressing part are both provided with heating elements so that the first pressing part and the second pressing part can heat the battery cell.

4. The electric core heating device according to claim 3, characterized in that: The first temperature measuring component includes a mounting component and a first temperature sensor. The mounting component is a heat insulating structure. The mounting component is connected to the heating component. The first temperature sensor is connected to the mounting component. The first temperature sensor is used to be thermally connected to the battery cell to detect the temperature of the battery cell.

5. The electric core heating device according to claim 4, characterized in that: The mounting member has a heat-insulating cavity, and the first temperature sensor is located at a side of the heat-insulating cavity away from the heating member.

6. The electric core heating device according to claim 3, characterized in that: The heating element includes an induction coil, and the induction coil is used to generate a changing magnetic field.

7. The electric core heating device according to claim 3, characterized in that: The heating module also includes a support frame, the first pressing portion is liftably arranged on the support frame, and the second pressing portion is fixedly arranged on the support frame.

8. The electric core heating device according to claim 3, characterized in that: The first heating module and the second heating module include a lifting assembly, and the lifting assembly is used to drive the first pressing part to rise and fall.

9. The electric core heating device according to any one of claims 1 to 8, characterized in that: The battery cell heating device also includes a second temperature measuring mechanism, which is used to detect the second temperature of the battery cell after being heated by the last second heating module. The control mechanism is communicated with the second temperature measuring mechanism, and the control mechanism is used to determine whether the battery cell is qualified based on the difference between the second temperature and the preset temperature.

10. A method for heating a battery core, characterized in that: A battery cell heating device according to any one of claims 1 to 9 is provided, wherein the battery cell heating method comprises: transporting the battery core to pass through the first heating module, so that the first heating module heats the battery core; detecting a first temperature of the battery cell after being heated by the first heating module adjacent to the second heating module and before being heated by the second heating module; comparing the first temperature with a preset temperature, and adjusting the heating power of the second heating module according to a difference between the first temperature and the preset temperature; The second heating module heats the battery cell according to the heating power.

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