Battery piece sintering equipment

Abstract

The utility model relates to battery piece sintering equipment which comprises a base, a transmission mechanism, a protection cover, a probe assembly and a laser, the base is provided with a material bearing table used for bearing battery pieces, and the transmission mechanism is used for transmitting the battery pieces to be sintered to the material bearing table and moving the sintered battery pieces away from the material bearing table. The protection cover is arranged above the base in a lifting mode, when the protection cover descends to abut against the base, a sealing cavity is defined by the protection cover and the base, the material bearing table is located in the sealing cavity, the sealing cavity is used for introducing process gas to provide a sintering atmosphere for battery pieces on the material bearing table, and the laser is located above the material bearing table; the probe assembly is used for applying reverse bias voltage to the battery piece in the sealing cavity. According to the battery piece sintering equipment, the protection cover descends to the position, abutting against the base, of the sealing cavity, so that the stability of the concentration of process gas when the battery piece is sintered in the sealing cavity is guaranteed, the sintering quality of the battery piece is improved, and then the conversion efficiency of a solar battery is improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a cell sintering device. Background Art

[0002] In the process of producing solar cells, after the screen printing process, the cells are dried in a drying furnace to volatilize the organic matter contained in the slurry of the printed electrodes in the solar cell (hereinafter referred to as "cell"). The dried cells are then sintered. The quality of sintering directly affects the electrical performance of the solar cell. However, the sintering process and sintering quality in the existing technology have become the key bottlenecks that limit the improvement of solar cell conversion efficiency. Summary of the invention

[0003] Based on this, a cell sintering device is provided to solve the problem of how to improve the cell sintering quality to enhance the solar cell conversion efficiency.

[0004] The present application provides a battery cell sintering device, comprising:

[0005] A base, wherein the base is provided with a material receiving platform for carrying the battery sheet;

[0006] A conveying mechanism, the conveying mechanism is used to convey the battery cells to be sintered to the receiving platform, and is used to remove the sintered battery cells from the receiving platform;

[0007] A protective cover, the protective cover is movably arranged above the base, and when the protective cover is lowered to abut against the base, the protective cover and the base enclose a sealed cavity, the receiving platform is located in the sealed cavity, and the sealed cavity is used to introduce process gas to provide a sintering atmosphere for the battery cells on the receiving platform;

[0008] A laser, the laser is located above the material receiving platform, and the laser is used to emit a laser to irradiate the battery sheet located on the material receiving platform;

[0009] A probe assembly is used to apply a reverse bias voltage to the battery cell in the sealed cavity.

[0010] In one embodiment, the probe assembly is connected to the protective cover, and when the protective cover is lowered to abut against the base, the probe assembly is electrically connected to the battery cell to apply a reverse bias voltage to the battery cell.

[0011] In one embodiment, the material of the material receiving platform is a conductive material, and the probe assembly includes a first probe group and a second probe group. When the protective cover is lowered to abut against the base, the first probe group is electrically in contact with the material receiving platform, and the second probe group is electrically in contact with the electrode grid lines of the battery cell located on the material receiving platform.

[0012] In one embodiment, the first probe group is disposed on an inner wall of one side of the protective cover, and the second probe group is disposed on an inner wall of the protective cover opposite to the first probe group.

[0013] In one embodiment, the first probe group and the second probe group each include a plurality of probes arranged at intervals, and the intervals between adjacent probes form a hollow portion, and the laser emitted by the laser can pass through the hollow portion to irradiate the battery cell located on the support table.

[0014] In one embodiment, the cell sintering equipment further includes a frame and a retractable top cover, the laser is fixed to the frame, one end of the retractable top cover is connected to the laser, and the other end is connected to the top of the protective cover.

[0015] In one embodiment, the cell sintering equipment further includes a process gas delivery device, the process gas delivery device is used to input process gas into the sealed cavity, at least one of the base and the protective cover is provided with a concentration detector, the concentration detector is used to detect the concentration of the process gas in the sealed cavity;

[0016] And / or, the battery cell sintering equipment also includes a vacuum pumping device. When the protective cover is lowered to abut against the base, the vacuum pumping device can evacuate the sealed cavity formed by the protective cover and the base. At least one of the base and the protective cover is provided with a vacuum detector, and the vacuum detector is used to detect the vacuum degree of the sealed cavity.

[0017] In one embodiment, the conveying mechanism includes a first conveying mechanism and a second conveying mechanism, wherein the first conveying mechanism is used to convey the battery cells to be sintered to the first conveying mechanism of the receiving platform, and the second conveying mechanism is used to remove the sintered battery cells from the receiving platform.

[0018] In one embodiment, the first transmission mechanism and / or the second transmission mechanism includes a belt assembly, a positioning assembly located on both sides of the belt assembly, and a transfer assembly for transferring battery cells between the belt assembly and the receiving platform, wherein the belt assembly is used to transmit battery cells, the positioning assembly is used to position the battery cells located on the belt assembly, and the transfer assembly includes a bracket, a lifting drive and a translation drive, the bracket is used to take and place battery cells, the lifting drive is used to drive the bracket to move up and down, and the translation drive is used to drive the bracket to move translationally along the direction of transmitting the battery cells.

[0019] In one embodiment, the receiving platform is provided with a space-avoiding groove for the bracket to transfer the battery cells, and the surface of the bracket for taking and placing the battery cells is provided with vacuum adsorption holes.

[0020] In the above-mentioned cell sintering equipment, since the protective cover can be lifted and lowered above the base, the lifting and lowering movement of the protective cover is used to achieve the protective cover and the base to abut or move away from each other. Since the protective cover can rise relative to the base and leave the base, it can meet the need of the transmission mechanism to transfer the cell to be sintered to the receiving table, and can also meet the need of the transmission mechanism to move the sintered cell away from the receiving table. After the cell to be sintered is transferred to the receiving table on the base by the transmission mechanism, the protective cover can be lowered to abut against the base to enclose and form a sealed cavity. In this way, when the process gas is introduced into the sealed cavity, it can ensure that the cell is in the sintering atmosphere of the process gas. Since the sealed cavity formed by the protective cover descending to the base to abut against each other has good sealing, it is conducive to maintaining the stability of the concentration of the process gas in the sealed cavity, so as to improve the cell sintering quality, and then improve the solar cell conversion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic structural diagram of a cell sintering device according to one embodiment of the present application.

[0023] Figure 2 It is a schematic structural diagram of the transmission mechanism and the material receiving platform of the battery cell sintering equipment according to one embodiment of the present application.

[0024] Figure 3 This is a schematic diagram of the arrangement structure of the probe assembly of the cell sintering equipment relative to the base and the protective cover according to one embodiment of the present application.

[0025] Figure 4 This is a partial structural schematic diagram of a cell sintering device according to one embodiment of the present application.

[0026] Figure 5 It is a schematic structural diagram of a probe assembly in a cell sintering device according to one embodiment of the present application.

[0027] Description of reference numerals:

[0028] 10. Cell sintering equipment; 11. Base; 111. Material receiving table; 1111. Air avoidance groove; 112. Vacuum extraction pipeline; 113. Vent; 12. Conveying mechanism; 121. First conveying mechanism; 122. Second conveying mechanism; 123. Belt assembly; 124. Positioning assembly; 1241. Roller; 1242. Positioning clamp; 125. Transfer assembly; 1251. Bracket; 1252. Lifting drive member; 1253. Translation drive member; 13. Protective cover; 14. Laser; 15. Probe assembly; 151. First probe group; 152. Second probe group; 153. Probe; 154. Hollow part; 16. Concentration detector; 17. Vacuum detector; 18. Retractable top cover. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0031] The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for illustrative purposes only and do not represent the only implementations.

[0032] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do 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 should not be understood as a limitation on the present application.

[0033] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] See also Figure 1 and Figure 2 As shown, a cell sintering device 10 provided in one embodiment of the present application includes a base 11, a transmission mechanism 12, a protective cover 13, a laser 14 and a probe assembly 15. The base 11 is provided with a receiving platform 111 for carrying the cell, and the receiving platform 111 may be detachably connected to the base 11, or may be integrally formed with the base 11, which is not limited here. The transmission mechanism 12 is used to transfer the cell to be sintered to the receiving platform 111, and to remove the sintered cell from the receiving platform 111. The protective cover 13 is liftably arranged above the base 11, and when the protective cover 13 is lowered to abut against the base 11, the protective cover 13 and the base 11 are enclosed to form a sealed cavity, and the receiving platform 111 is located in the sealed cavity, and the sealed cavity is used to introduce process gas to provide a sintering atmosphere for the cell on the receiving platform 111. The laser 14 is located above the material receiving platform 111 , and is used to emit laser light to irradiate the battery cells located on the material receiving platform 111 .

[0035] In this embodiment, the probe assembly 15 is used to apply a reverse bias voltage to the battery cell in a sealed cavity. When the battery cell is transferred to the receiving platform 111, the protective cover 13 is lowered to abut against the base 11 to form a sealed cavity, and then a process gas can be introduced into the sealed cavity to construct a sintering atmosphere. Based on the probe assembly 15 applying a reverse bias voltage to the battery cell in the sealed cavity, when the laser 14 emits a laser to irradiate the battery cell to generate carriers, the carriers are separated under the action of the reverse bias voltage, and accumulate at the position where the electrode grid line of the battery cell forms a contact with the silicon wafer to generate heat. After reaching a certain temperature, the temperature begins to drop so that the electrode grid line forms an ohmic contact with the silicon wafer.

[0036] Since the cell sintering equipment 10 in the embodiment of the present application uses the protective cover 13 to descend to abut against the base 11 to form a sealed cavity enclosed by the protective cover 13 and the base 11, the sealed cavity formed by this structure has good sealing performance. Therefore, after the process gas is introduced into the sealed cavity to form a sintering atmosphere, the process gas is not easy to leak from the sealed cavity, and the concentration of the process gas in the sealed cavity is stabilized. As a result, the cell located in the sealed cavity can be sintered in a stable sintering atmosphere, thereby improving the cell sintering quality and improving the conversion efficiency of the solar cell.

[0037] It should be noted that in the cell sintering equipment 10 of the above embodiment, since the protective cover 13 can be lifted and lowered above the base 11, the lifting and lowering movement of the protective cover 13 is used to achieve the protective cover 13 and the base 11 to abut or move away from each other. Therefore, the protective cover 13 can rise relative to the base 11 and leave the base 11 to meet the needs of the transmission mechanism 12 to transfer the cell to be sintered to the receiving platform 111, and can also meet the needs of the transmission mechanism 12 to move the sintered cell away from the receiving platform 111. Therefore, the protective cover 13 does not need to have an opening for the cell to enter and exit, and then after the cell to be sintered is transferred to the receiving platform 111 on the base 11 by the transmission mechanism 12, the protective cover 13 is lowered to abut against the base 11 to enclose and form a sealed cavity, and the process gas can be introduced into the sealed cavity to ensure that the cell is in the sintering atmosphere of the process gas. Since the sealed cavity formed by the protective cover 13 and the base 11 abutting against each other has good sealing performance, when the concentration of the process gas reaches a certain level, there is no need to continuously supply more process gas to the sealed cavity, so that the concentration stability of the process gas in the sealed cavity can be maintained, and the use of the cell sintering equipment 10 of the present application can also reduce the waste of process gas. Accordingly, when the process gas supply speed is constant, the process gas in the sealed cavity will not leak, thereby shortening the time for supplying the process gas, which is conducive to improving the working efficiency of the cell sintering equipment 10.

[0038] The probe assembly 15 is connected to the protective cover 13 so as to rise and fall with the protective cover 13. When the protective cover 13 is lowered to abut against the base 11, on the one hand, the protective cover 13 and the base 11 are enclosed to form a sealed cavity, and on the other hand, the probe assembly 15 is electrically connected to the battery cell to apply a reverse bias voltage to the battery cell in the sealed cavity. The probe assembly 15 can be installed on the inner wall of the protective cover 13 through a mounting seat, or the probe assembly 15 can be integrally formed with the protective cover 13 by injection molding. The connection method between the probe assembly 15 and the protective cover 13 is not limited here.

[0039] The material of the support platform 111 includes, but is not limited to, conductive materials such as copper, copper alloy, and nickel alloy. In some embodiments, the battery cell includes an N region and a P region, and the electrode grid lines of the battery cell are located in the P region. Since the material of the support platform 111 is a conductive material, when the battery cell is placed on the support platform 111, the N region of the battery cell can be placed on the support platform 111 so that the N region of the battery cell is in electrical contact with the support platform 111. Figure 3 and Figure 4As shown, the probe assembly 15 includes a first probe group 151 and a second probe group 152. When the protective cover 13 is lowered to abut against the base 11, the first probe group 151 is in electrical contact with the material receiving platform 111, and the second probe group 152 is in electrical contact with the electrode grid lines of the battery cell located on the material receiving platform 111. In this way, the first probe group 151 and the second probe group 152 can be used to apply voltage to the electrode grid lines of the N region and the P region of the battery cell to achieve the application of a reverse bias voltage to the battery cell in the sealed cavity. Then, when the laser 14 emits a laser to irradiate the battery cell to generate carriers, the carriers are separated under the action of the electric field, and accumulate at the position where the electrode grid lines of the battery cell form contacts with the silicon wafer to generate heat. After reaching a certain temperature, the temperature starts to drop so that the electrode grid lines and the silicon wafer form ohmic contact.

[0040] The first probe group 151 and the second probe group 152 may be disposed opposite to each other. For example, the first probe group 151 is disposed on the inner wall of one side of the protective cover 13 , and the second probe group 152 is disposed on the inner wall of the protective cover 13 opposite to the first probe group 151 .

[0041] Combination Figure 5 As shown, the first probe group 151 and the second probe group 152 both include a plurality of probes 153 arranged at intervals, so that the intervals between adjacent probes 153 form a hollow portion 154, so that the hollow portion 154 can be used to meet the need for laser penetration. Therefore, this structural setting is conducive to reducing the shielding area of ​​the laser emitted by the laser 14 irradiating the battery cell, thereby increasing the laser irradiation area of ​​the battery cell during the sintering process and improving the sintering effect. The number of probes 153 in the first probe group 151 and the second probe group 152 is not limited here.

[0042] In some embodiments, the cell sintering equipment 10 further includes a process gas delivery device (not shown), which is used to input process gas into the sealed cavity so that the gas atmosphere of the sealed cavity meets the sintering requirements of the cell.

[0043] See again Figure 3 As shown, at least one of the base 11 and the protective cover 13 is provided with a concentration detector 16, which is used to detect the concentration of the process gas in the sealed cavity. When the concentration detector 16 detects that the concentration of the process gas in the sealed cavity reaches the gas atmosphere required for cell sintering as a preset concentration, the probe assembly 15 energizes the cell.

[0044] In some embodiments, the battery cell sintering equipment 10 also includes a vacuum device (not shown). When the protective cover 13 is lowered to abut against the base 11, the vacuum device can evacuate the sealed cavity formed by the protective cover 13 and the base 11 to exhaust the air in the sealed cavity. This is conducive to constructing the gas atmosphere required for battery cell sintering by introducing process gas into the environment in the sealed cavity.

[0045] Continue reading Figure 3 As shown, the base 11 is provided with a vacuum pumping line 112, and the vacuum pumping device is connected to the vacuum pumping line 112. After the protective cover 13 and the base 11 are abutted to enclose and form a sealed cavity, the vacuum pumping device is turned on, and the vacuum pumping device removes the air in the sealed cavity through the vacuum pumping line 112. The sealed cavity formed by the abutment of the protective cover 13 and the base 11 has good sealing performance, so as the vacuum pumping device continues to remove air from the sealed cavity, the vacuum degree in the sealed cavity becomes higher and higher. When the vacuum degree in the sealed cavity reaches a preset value, process gas can be introduced into the sealed cavity. Since the sealed cavity has a certain negative pressure after vacuuming, when the process gas is introduced, the process gas will be sucked into the sealed cavity. Therefore, this method of vacuuming the sealed cavity by the vacuum pumping device is conducive to improving the efficiency of the process gas entering the sealed cavity. Moreover, the sealed cavity in a vacuum state has a low air concentration, thereby reducing the dilution of the concentration of the process gas entering the sealed cavity, so that the concentration of the process gas in the sealed cavity can quickly meet the gas atmosphere required for the sintering of the battery cell.

[0046] A sealing material may be provided at the contact position between the protective cover 13 and the base 11 to enhance the airtightness of the sealed cavity formed when the two are in contact. The sealing material includes but is not limited to foam or rubber.

[0047] Combination Figure 3 As shown, the base 11 may be provided with a vent hole 113. When the protective cover 13 and the base 11 are pressed against each other to enclose a sealed cavity, the vent hole 113 is connected to the sealed cavity. The vent hole 113 is used to meet the need of passing the process gas into the sealed cavity.

[0048] It should be noted that the locations of the vent hole 113 and the vacuum line 112 on the base 11 are not limited herein. For example, in some embodiments, at least one of the vent hole 113 and the vacuum line 112 is disposed on the side or bottom of the base 11. In some embodiments, one of the vent hole 113 and the vacuum line 112 is disposed on the side of the base 11, and the other is disposed on the bottom of the base 11.

[0049] like Figure 3As shown, in some embodiments, at least one of the base 11 and the protective cover 13 is provided with a vacuum detector 17, and the vacuum detector 17 is used to detect the vacuum degree of the sealed cavity. During the vacuuming process, the vacuum condition of the sealed cavity is detected by the vacuum detector 17. When the vacuum degree of the sealed cavity reaches a preset value, the process gas delivery device starts to introduce process gas into the sealed cavity.

[0050] Continue reading Figure 3 As shown, the relative position between the laser 14 and the base 11 is fixed. In other words, the laser 14 will not move relative to the base 11, that is, the laser 14 is a non-moving part, thereby ensuring the accuracy of the laser emitted by the laser 14 to accurately irradiate the battery cell. In this embodiment, the battery cell sintering equipment 10 also includes a frame (not shown) and a retractable top cover 18, the laser 14 is fixed to the frame, one end of the retractable top cover 18 is connected to the laser 14, and the other end is connected to the top of the protective cover 13. Since the retractable top cover can be retracted, the protective cover 13 can be raised and lowered relative to the fixed laser 14 without being interfered by the laser 14. Based on this, through this structural setting, the laser 14 can be irradiated to the battery cell at a fixed position, so as to ensure that the laser is accurately irradiated to the battery cell, and the retractable top cover 18 can be used to maintain the flexibility of the lifting and lowering movement of the protective cover 13, so as to maintain the airtightness of the sealed cavity formed by the protective cover 13 and the base 11 when the protective cover 13 moves to abut against the base 11.

[0051] The retractable top cover 18 can be made of a flexible material such as silica gel. In some embodiments, the retractable top cover 18 can also be a plurality of frame-shaped shell covers connected in a retractable manner, and sealing members such as sealing rings are arranged at the connecting positions for sealing.

[0052] It should be noted that the lifting movement of the protective cover 13 can be achieved by a servo motor, or by a vertically arranged lifting cylinder or lifting electric cylinder. The method for achieving the lifting movement of the protective cover 13 is not limited here. As long as the protective cover 13 can be adjusted in position by lifting movement above the base 11, and the transmission mechanism 12 can transfer the battery cell to the receiving platform 111 or remove it from the receiving platform 111 when the protective cover 13 leaves the base 11, it can be done.

[0053] Combine again Figure 1 and Figure 2As shown, the conveying mechanism 12 includes a first conveying mechanism 121 for conveying the battery cells to be sintered to the receiving platform 111, and a second conveying mechanism 122 for removing the sintered battery cells from the receiving platform 111. The first conveying mechanism 121 and the second conveying mechanism 122 can be located on both sides of the base 11 in the direction of the battery cells entering and exiting, so that the first conveying mechanism 121 and the second conveying mechanism 122 can be used to realize that multiple battery cells pass through the receiving platform 111 in sequence, so as to realize assembly line operation.

[0054] The first transmission mechanism 121 and the second transmission mechanism 122 are both used as mechanisms for transferring battery cells, and their structures can be the same or different. For the first transmission mechanism 121, as long as the first transmission mechanism 121 can meet the needs of transferring the battery cells to the receiving platform 111 and will not interfere with the protective cover 13 and the base 11 to form a sealed cavity. Correspondingly, for the second transmission mechanism 122, as long as the second transmission mechanism 122 can meet the need to remove the battery cells on the receiving platform 111 from the receiving platform 111 when the protective cover 13 leaves the base 11.

[0055] Continue reading Figure 1 and Figure 2 As shown, in some embodiments, the first transmission mechanism 121 and / or the second transmission mechanism 122 includes a belt assembly 123, a positioning assembly 124 and a transfer assembly 125. The positioning assembly 12 is located on both sides of the belt assembly 123, and the positioning assembly 124 is used to position the battery sheet on the belt assembly 123 to maintain the stability of the battery sheet during transmission on the belt assembly 123. The transfer assembly 125 is used to transfer the battery sheet between the belt assembly 123 and the receiving platform 111. It can be understood that the transfer assembly 125 of the first transmission mechanism 121 is used to transfer the battery sheet transmitted by the belt assembly 123 of the first transmission mechanism 121 to the receiving platform 111; the transfer assembly 125 of the second transmission mechanism 122 is used to transfer the battery sheet on the receiving platform 111 to the belt assembly 123 of the second transmission mechanism 122. In this way, the first conveying mechanism 121 and the second conveying mechanism 122 can be used to realize the assembly line operation of transferring the material to be sintered to the receiving platform 11 and removing it from the receiving platform 11 after sintering is completed on the receiving platform 11 .

[0056] The positioning assembly 124 may be a positioning clamp 1242 with a roller 1241. There may be multiple rollers 1241 on one positioning clamp 1242. For example, one positioning clamp 1242 includes two or more rollers 1241 to improve the positioning effect of the battery cell.

[0057] When positioning the battery cell on the belt assembly 123, the positioning clamps 1242 located on both sides of the belt assembly 123 move inward so that the roller 1241 rolls and abuts against the battery cell, thereby positioning the battery cell on the belt assembly 123, allowing the battery cell to be stably transmitted along the transmission direction of the belt assembly 123, reducing the probability of the battery cell slipping off the belt assembly 123.

[0058] In some embodiments, the positioning clamp 1242 may be driven by a cylinder. The positioning clamp 1242 may move relative to the belt assembly 123 in a direction perpendicular to the direction of transmitting the battery sheet, thereby abutting against the edge of the battery sheet on the belt assembly 123 to achieve the effect of positioning the battery sheet.

[0059] The transfer assembly 125 includes a bracket 1251, a lifting drive 1252, and a translation drive 1253. The lifting drive 1252 is used to drive the bracket 1251 to move up and down, and the translation drive 1253 is used to drive the bracket 1251 to move in a translational direction along the direction of transferring the battery cell. In this embodiment, the lifting drive 1252 and the translation drive 1253 are used to respectively realize the lifting and translational movement of the bracket 1251, so that the bracket 1251 can support the lifting and translational movement of the battery cell, thereby meeting the needs of transferring the battery cell.

[0060] The lifting drive 1252 includes but is not limited to a structure that can realize lifting motion, such as a cylinder or a screw drive. The translation drive 1253 includes but is not limited to a structure that can realize horizontal motion, such as a cylinder or a screw drive. Among them, in the implementation of the screw drive, the power source can be a servo motor.

[0061] Furthermore, vacuum adsorption holes are provided on the surface of the bracket 1251 for taking and placing the battery cells, thereby improving the stability of the bracket 1251 in transferring the battery cells.

[0062] In some embodiments, vacuum adsorption holes for adsorbing the battery cells are provided on the surface of the material receiving platform 111. In this embodiment, the battery cells placed on the material receiving platform 111 are adsorbed through the vacuum adsorption holes to enhance the stability of the battery cells, thereby reducing the probability of displacement of the battery cells during the sintering process, thereby improving the stability of the battery cells during the sintering process and improving the sintering quality.

[0063] It can be understood that the vacuum adsorption holes in the present application are connected to vacuum pumping equipment to achieve vacuuming, so that the vacuum adsorption holes vacuum adsorb the battery cells to enhance the stability of the battery cells.

[0064] Continue to combine Figure 1 and Figure 2As shown, in an embodiment in which the transfer assembly 125 includes a bracket 1251, the receiving table 111 is provided with a clearance groove 1111 for the bracket 1251 to transfer the battery cells. The clearance groove 1111 is utilized to meet the clearance needs of the bracket 1251, so that the bracket 1251 can extend under the surface of the receiving table 111 on which the battery cells are placed. In this way, the bracket 1251 can place the battery cells on the receiving table 111 or lift the battery cells on the receiving table 111 through lifting movements.

[0065] The bracket 1251 includes a plurality of support arms arranged at intervals, so as to support the battery cells by using the plurality of support arms, so that the battery cells are not easy to slide off the bracket 1251, thereby improving the stability of transferring the battery cells. In this embodiment, when the bracket 1251 takes and places the battery cells on the receiving platform 111, the support arms extend into the avoidance grooves 1111. In this way, when the support arms rise, the battery cells on the receiving platform 111 can be lifted, and correspondingly, when the support arms support the battery cells and descend, the battery cells can be placed on the receiving platform 111.

[0066] It should be noted that, through the arrangement of the first conveying mechanism 121 and the second conveying mechanism 122, the division of labor of the two operations of conveying the battery cells to be sintered to the receiving table 111 and removing the battery cells on the receiving table 111 can be achieved, so that the input and output of the battery cells on the receiving table 111 do not interfere with each other, that is, the first conveying mechanism 121 and the second conveying mechanism 122 do not interfere with each other when transferring the battery cells, so as to improve the stability and operating efficiency of the battery cell sintering equipment 10 in the assembly line operation of the battery cells.

[0067] For the first conveying mechanism 121 and the second conveying mechanism 122 both including a bracket 1251 for transferring battery cells, the two brackets 1251 will not interfere with each other and cause collision when transferring battery cells. For example, when the bracket 1251 of the first conveying mechanism 121 places the battery cells on the receiving platform 111, the bracket 1251 of the second conveying mechanism 122 is located outside the base 11 and will not interfere with the first conveying mechanism 121 placing the battery cells. Accordingly, before the bracket 1251 of the second conveying mechanism 122 removes the battery cells on the receiving platform 111, the bracket 1251 of the first conveying mechanism 121 is located outside the base 11 and will not interfere with the operation of the second conveying mechanism 122 removing the battery cells on the receiving platform 111.

[0068] Of course, the scheme for avoiding mutual interference between the first transmission mechanism 121 and the second transmission mechanism 122 is not limited to this. For example, in some embodiments, the height at which the bracket 1251 of the first transmission mechanism 121 transfers the battery cell above the material platform 111 is different from the height at which the bracket 1251 of the second transmission mechanism 122 transfers the battery cell above the material platform 111, so that even if both are located above the material platform 111 at the same time, they will not interfere with each other's operation of transferring the battery cell. For example, when the bracket 1251 of the first transmission mechanism 121 and the bracket 1251 of the second transmission mechanism 122 are both located above the material platform 111, the heights are the first height and the second height, respectively, and the first height is higher than the second height, the battery cell taken and placed by the bracket 1251 of the first transmission mechanism 121 is located at the first height, and the first height is higher than the height of the battery cell located on the material platform 111. At this time, the bracket 1251 of the second transmission mechanism 122 moves up and down within a range below the first height without colliding with the battery cell located on the bracket 1251 of the first transmission mechanism 121. Therefore, the second transmission mechanism 122 can be used to lift the battery cell on the receiving platform 111 and translate it at the second height to remove the battery cell.

[0069] After the second conveying mechanism 122 removes the battery cell from the receiving platform 111, the bracket 1251 of the first conveying mechanism 121 can move downward to place the battery cell at the first height onto the receiving platform 111. For another example, after the bracket 1251 of the second conveying mechanism 122 lifts the battery cell on the receiving platform 111 to a certain height, the bracket 1251 of the first conveying mechanism 121 can move freely within a range below the height to transfer the battery cell to the receiving platform 111.

[0070] It is understandable that there is no sequence restriction on the steps of transferring the battery cells by the first conveying mechanism 121 and the second conveying mechanism 122 at the receiving table 111. As long as the first conveying mechanism 121 and the second conveying mechanism 122 do not interfere with each other when transferring the battery cells, the battery cell sintering equipment 10 can achieve stable assembly line operation.

[0071] In some embodiments, a maintenance door is provided on at least one side of the protective cover 13. When the cell sintering device 10 needs to be maintained, the maintenance door can be opened to maintain the location where the device fails, making the maintenance operation convenient.

[0072] The cell sintering equipment 10 has a foolproof function. For example, a normally closed solenoid valve is provided in the pipeline for the process gas delivery device to deliver the process gas to the sealed chamber. When the cell sintering equipment 10 is in a shutdown state, the normally closed state of the solenoid valve is used to prevent the process gas from leaking into the environment to avoid danger caused by inhalation by maintenance personnel.

[0073] In some embodiments, a special gas detection and warning device is provided in the cell sintering equipment 10. The use of the special gas detection and warning device can meet the safety protection detection needs of each link of the cell sintering equipment 10.

[0074] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above 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.

[0075] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the inventive concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A cell sintering device (10), characterized in that: include: A base (11), wherein the base (11) is provided with a material receiving platform (111) for supporting battery cells; A transport mechanism (12), the transport mechanism (12) being used to transport the battery cells to be sintered to the material receiving platform (111), and being used to remove the sintered battery cells from the material receiving platform (111); A protective cover (13), the protective cover (13) being movably disposed above the base (11), and when the protective cover (13) is lowered to abut against the base (11), the protective cover (13) and the base (11) are enclosed to form a sealed cavity, the receiving platform (111) being located in the sealed cavity, and the sealed cavity being used to introduce process gas to provide a sintering atmosphere for the battery cells on the receiving platform (111); a laser (14), the laser (14) being located above the material receiving platform (111), the laser (14) being used to emit laser light to irradiate a battery cell located on the material receiving platform (111); A probe assembly (15), the probe assembly (15) being used to apply a reverse bias voltage to the battery cell.

2. The cell sintering device (10) according to claim 1, characterized in that: The probe assembly (15) is connected to the protective cover (13); when the protective cover (13) is lowered to abut against the base (11), the probe assembly (15) is electrically connected to the battery cell to apply a reverse bias voltage to the battery cell.

3. The cell sintering device (10) according to claim 1 or 2, characterized in that: The material of the material receiving platform (111) is a conductive material, and the probe assembly (15) comprises a first probe group (151) and a second probe group (152). When the protective cover (13) is lowered to abut against the base (11), the first probe group (151) is in electrical contact with the material receiving platform (111), and the second probe group (152) is in electrical contact with the electrode grid lines of the battery cell located on the material receiving platform (111).

4. The cell sintering device (10) according to claim 3, characterized in that: The first probe group (151) is arranged on an inner wall of one side of the protective cover (13), and the second probe group (152) is arranged on an inner wall of the protective cover (13) opposite to the first probe group (151).

5. The cell sintering device (10) according to claim 3, characterized in that: The first probe group (151) and the second probe group (152) both include a plurality of probes arranged at intervals, the intervals between adjacent probes forming a hollow portion (154), and the laser light emitted by the laser (14) can pass through the hollow portion (154) to irradiate the battery cell located on the receiving platform (111).

6. The cell sintering device (10) according to claim 1, characterized in that: The cell sintering equipment (10) further comprises a frame and a retractable top cover (18), wherein the laser (14) is fixed to the frame, and one end of the retractable top cover (18) is connected to the laser (14), and the other end is connected to the top of the protective cover (13).

7. The cell sintering device (10) according to claim 1, characterized in that: The cell sintering equipment (10) further comprises a process gas delivery device, the process gas delivery device is used to input process gas into the sealed cavity, at least one of the base (11) and the protective cover (13) is provided with a concentration detector (16), the concentration detector (16) is used to detect the concentration of the process gas in the sealed cavity; And / or, the cell sintering equipment (10) further comprises a vacuum pumping device, and when the protective cover (13) is lowered to abut against the base (11), the vacuum pumping device can evacuate the sealed cavity formed by the protective cover (13) and the base (11), and at least one of the base (11) and the protective cover (13) is provided with a vacuum detector (17), and the vacuum detector (17) is used to detect the vacuum degree of the sealed cavity.

8. The cell sintering device (10) according to claim 1, characterized in that: The conveying mechanism (12) comprises a first conveying mechanism (121) and a second conveying mechanism (122), wherein the first conveying mechanism (121) is used to convey the battery cells to be sintered to the first conveying mechanism (121) of the receiving platform (111), and the second conveying mechanism (122) is used to remove the sintered battery cells from the receiving platform (111).

9. The cell sintering device (10) according to claim 8, characterized in that: The first transmission mechanism (121) and / or the second transmission mechanism (122) comprises a belt assembly (123), positioning assemblies (124) located on both sides of the belt assembly (123), and a transfer assembly (125) for transferring battery cells between the belt assembly (123) and the receiving platform (111), wherein the belt assembly (123) is used to transmit battery cells, the positioning assembly (124) is used to position the battery cells located on the belt assembly (123), and the transfer assembly (125) comprises a bracket (1251), a lifting drive member (1252) and a translation drive member (1253), wherein the bracket (1251) is used to take and place battery cells, the lifting drive member (1252) is used to drive the bracket (1251) to move up and down, and the translation drive member (1253) is used to drive the bracket (1251) to move in a translational direction along the direction of transmitting the battery cells.

10. The cell sintering equipment (10) according to claim 9, characterized in that: The material receiving platform (111) is provided with a void groove (1111) for the bracket (1251) to transfer the battery sheet, and a vacuum adsorption hole is provided on the surface of the bracket (1251) for taking and placing the battery sheet.

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