Annealing furnace and battery piece efficiency improving device

Abstract

The utility model discloses an annealing furnace and a battery piece efficiency improving device. The annealing furnace comprises a first furnace section, a feeding and discharging mechanism and a second furnace section which are sequentially arranged in the battery piece conveying direction. According to the application, the second furnace section is shut down after a damaged battery piece is observed at a corresponding position, meanwhile, the battery pieces output by the first furnace section are continuously received through the feeding and discharging mechanism arranged between the first furnace section and the second furnace section, and after the damaged battery piece is cleaned, the second furnace section is restarted; the feeding and discharging mechanism directly provides the battery pieces for the second furnace section, so that the second furnace section can quickly perform corresponding treatment on the battery pieces, the production efficiency of the battery pieces is ensured, the operation states of the other furnace sections are not influenced while the second furnace section is shut down, the battery pieces are quickly provided for the second furnace section after the second furnace section is restarted, and the production efficiency of the battery pieces is improved. And finally, the production efficiency of the battery piece is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery piece processing equipment, and in particular to an annealing furnace and a battery piece efficiency improving device. BACKGROUND

[0002] Due to the influence of production process or raw materials, the battery piece may be likely to appear light-induced attenuation in the production, testing or use process. At present, the battery piece annealing furnace is usually used to perform light injection treatment on the battery piece to reduce the light attenuation effect.

[0003] The current battery piece annealing furnace generally includes at least a heating section and a light section connected in sequence. The adjacent furnace sections are transmitted through a conveying line. The battery piece to be processed enters the annealing furnace and will sequentially receive the process treatment corresponding to the two furnace sections and leave from the furnace tail.

[0004] In actual production, if a fragment accident occurs in the light section, the conveying and light and heating treatment of the battery piece annealing furnace need to be suspended, and even the conveying in the process position before the battery piece annealing furnace needs to be stopped for cleaning and maintenance, which delays the time and further affects the production efficiency of the battery piece. INVENTION CONTENTS

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides an annealing furnace and a battery piece efficiency improving device to solve the problem that the current annealing furnace needs to suspend part of the furnace section due to the fragment accident in the light section and / or cooling section, thereby affecting the production efficiency of the battery piece.

[0006] In a first aspect, the present application provides an annealing furnace, including a first furnace section, a loading and unloading mechanism and a second furnace section arranged in sequence along the conveying direction of the battery piece, wherein:

[0007] The first furnace section includes at least one heating furnace cavity, and the heating furnace cavity is configured to at least implement heating treatment on the battery piece;

[0008] The second furnace section includes at least one light injection furnace cavity, and the light injection furnace cavity is configured to at least implement light injection treatment on the battery piece;

[0009] The loading and unloading mechanism is arranged between the first furnace section and the second furnace section, and the loading and unloading mechanism is configured to receive the battery piece from the first furnace section and / or provide the battery piece to the second furnace section;

[0010] A first conveying assembly is arranged in the second furnace section, and the first conveying assembly includes a first conveying belt arranged along a preset direction and a first driving mechanism, and the first driving mechanism is used to drive the first conveying belt to convey the battery piece;

[0011] The feeding and discharging mechanism comprises a third conveying assembly, the third conveying assembly comprises a third conveying belt arranged in a preset direction and a third driving mechanism, the third driving mechanism is used for driving the third conveying belt to convey the battery piece, and the third conveying belt is respectively connected with the discharging end of the first furnace section and the first conveying belt.

[0012] Based on the above annealing furnace, when the damaged battery pieces in the second furnace section and / or at the second furnace discharging end are observed, the second furnace section is stopped to facilitate the cleaning and maintenance of the staff, and at the same time, the feeding and discharging mechanism arranged between the first furnace section and the second furnace section continuously receives the battery pieces output by the first furnace section, so that the first furnace section and the previous process of the first furnace section can continue to run, after the damaged battery pieces are cleaned, the second furnace section is restarted, and the feeding and discharging mechanism directly provides the battery pieces to the second furnace section, so that the second furnace section can quickly process the battery pieces, ensuring the production efficiency of the battery pieces, that is, the running state of the remaining furnace sections is not affected when the second furnace section is stopped, and the battery pieces are quickly provided to the second furnace section after the second furnace section is restarted, finally realizing the improvement of the production efficiency of the battery pieces.

[0013] Optionally, the annealing furnace further comprises a third furnace section connected with the second furnace section, the third furnace section comprises at least one cooling furnace cavity configured to cool the battery pieces, and the second furnace section is provided with a second conveying assembly, the second conveying assembly comprises a second conveying belt arranged in a preset direction and a second driving mechanism, the second driving mechanism is used for driving the second conveying belt to convey the battery pieces, and the first conveying belt is respectively connected with the discharging end of the feeding and discharging mechanism and the second conveying belt.

[0014] Further, based on one embodiment of the above annealing furnace, a third furnace section is arranged after the second furnace section to cool the battery pieces just discharged from the furnace to prevent the high temperature from adversely affecting the subsequent process.

[0015] Optionally, at least one of the second furnace section, the third furnace section and the discharging end of the third furnace section is provided with a detection element configured to detect whether the battery piece passing through the detection element is a damaged battery piece, and the detection element is electrically connected with an alarm element configured to issue a prompt when the detection element detects a damaged battery piece in the corresponding furnace section.

[0016] Further, based on one embodiment of the above annealing furnace, the detection element can realize automatic detection of damaged battery pieces and reduce the missed detection rate of battery pieces, and can timely issue a prompt to prompt the staff to take measures.

[0017] Optionally, the feeding and discharging mechanism is further configured to temporarily store the battery pieces received by the first furnace section after the detection element detects the damaged battery pieces; and the feeding and discharging mechanism is further configured to feed the temporarily stored battery pieces to the second furnace section after the damaged battery pieces in the second furnace section and / or the third furnace section and / or the discharge end of the third furnace section are cleaned.

[0018] Further, based on one of the above embodiments of the annealing furnace, after the detection element detects the damaged battery pieces, the feeding and discharging mechanism receives the battery pieces output by the first furnace section and temporarily stores the battery pieces; and after the damaged battery pieces are cleaned, the feeding and discharging mechanism feeds the temporarily stored battery pieces to the second furnace section, so that the second furnace section can quickly resume operation.

[0019] Optionally, the first conveying belt and the second conveying belt are each provided with at least one detection gap in the preset direction, the detection gap is arranged vertically to the conveying surface of the first conveying belt or the second conveying belt to allow the fragments of the battery pieces to pass through, and the detection element is arranged below the detection gap with the detection end opposite to the detection gap.

[0020] Further, based on one of the above embodiments of the annealing furnace, when all the furnace sections are in operation, the battery pieces are always in the conveying state, and if the battery pieces are damaged, the fragments will remain on the conveying surface, and when the fragments flow through the detection gap, the fragments will fall through the detection gap to allow the detection element to accurately detect the fragments.

[0021] Optionally, the detection element is a high-temperature-resistant photoelectric sensing element or a detection camera.

[0022] Further, based on one of the above embodiments of the annealing furnace, by setting the detection element as a high-temperature-resistant photoelectric sensing element or a detection camera, the detection reliability of the detection element in a high-temperature environment can be ensured.

[0023] Optionally, the feeding and discharging mechanism further includes a carrying platform and a carrying assembly, wherein:

[0024] The carrying platform is arranged on at least one side of the third conveying belt and is configured to carry the battery pieces;

[0025] The carrying assembly includes a support, a carrying part movable relative to the support, and the carrying part is configured to carry the battery pieces from the third conveying belt to the carrying platform according to the signal of the detection element.

[0026] Further, based on one of the above embodiments of the annealing furnace, when the detection element detects the damaged battery pieces, the carrying assembly receives the signal and carries the battery pieces on the third conveying belt to the carrying platform, so as to temporarily store the battery pieces.

[0027] Optionally, the bearing platform is provided with a horizontal moving assembly, the horizontal moving assembly comprises a slide rail and a support structure, the support structure is used for placing the battery piece and is in sliding connection with the slide rail, so that the support structure loaded with the battery piece is close to or away from the third conveying belt; and / or,

[0028] The bearing platform is provided with a jacking assembly, the jacking assembly comprises a driving member and a jacking structure connected with the driving end of the driving member, the bearing platform is provided with an avoiding hole for avoiding the jacking structure, and the driving member is used for driving the jacking structure to move in the vertical direction and jacking the battery piece to a predetermined height.

[0029] Further, based on one embodiment of the above annealing furnace, the support structure can be used to place a certain number of battery pieces, when the number of battery pieces on the support structure reaches the upper limit, the support structure can be manually slid away from the third conveying belt relative to the slide rail, the battery pieces are taken away, and then the support structure is slid towards the third conveying belt relative to the slide rail to continue to be used for placing battery pieces;

[0030] When the handling part carries the battery piece to the bearing platform, the jacking structure is driven by the driving member to move in the vertical direction to a predetermined height, so that the distance between the handling part and the jacking structure and the top surface of the battery piece is kept within a range, so as to directly place the battery piece on the support structure, shorten the running time of the handling part, and improve the efficiency of carrying the battery piece.

[0031] Optionally, the feeding and discharging mechanism comprises at least two handling assemblies, all the handling assemblies are arranged at intervals in a predetermined direction, and the handling assembly comprises a Bernoulli suction cup.

[0032] Among them, at least one handling assembly is configured to carry the battery piece on the third conveying belt to the bearing platform, and at least one handling assembly is configured to carry the battery piece on the bearing platform to the third conveying belt.

[0033] Further, based on one embodiment of the above annealing furnace, by providing a plurality of handling assemblies, a plurality of battery pieces can be carried at the same time, thereby improving the carrying efficiency of the battery pieces, or carrying battery pieces of different paths (from the third conveying belt to the bearing platform, from the bearing platform to the third conveying belt) at the same time, thereby shortening the transfer efficiency of the battery pieces when the second furnace section and the third furnace section are switched between stopping and running.

[0034] Optionally, the heating furnace cavity, the light injection furnace cavity and the cooling furnace cavity each comprise an upper furnace cavity and a lower furnace cavity in snap connection, and the upper furnace cavity and the lower furnace cavity form a conveying channel for the corresponding conveying assembly to pass through after being snap connected.

[0035] Further, based on one embodiment of the above annealing furnace, the upper furnace cavity and the lower furnace cavity in snap connection are used, which facilitates disassembly and assembly of related structures and parts in the annealing furnace.

[0036] Optionally, the heating furnace cavity is provided with an infrared lamp assembly in the upper furnace cavity and / or the lower furnace cavity corresponding to the heating furnace cavity, and the infrared lamp assembly is configured to perform heating treatment on the battery piece.

[0037] and / or,

[0038] The light injection furnace cavity is provided with an LED lamp assembly in the upper furnace cavity and / or the lower furnace cavity corresponding to the light injection furnace cavity, and the LED lamp assembly is configured to perform light injection treatment on the battery piece. The LED lamp assembly is attached with a water cooling module.

[0039] and / or,

[0040] The cooling furnace cavity is provided with an air exchange assembly in the upper furnace cavity and / or the lower furnace cavity corresponding to the cooling furnace cavity, and the air exchange assembly includes an air inlet member and an air outlet member. The air inlet member is configured to introduce a gas at a predetermined temperature into the cooling furnace cavity to cool the battery piece, and the air outlet member is configured to extract the gas in the cooling furnace cavity.

[0041] Further, based on one embodiment of the above annealing furnace, by arranging the infrared lamp assembly or the LED lamp assembly or the air exchange assembly in the corresponding furnace cavity, the processing technology in the corresponding furnace section can be realized.

[0042] Optionally, at least one of the upper furnace cavity and the lower furnace cavity is further provided with a thermocouple for temperature measurement.

[0043] Further, based on one embodiment of the above annealing furnace, the temperature in the corresponding furnace section can be obtained in time to ensure the processing effect of the technology.

[0044] In a second aspect, the present application provides a battery piece processing device, comprising: a battery piece efficiency improving device further comprising a laser efficiency improving mechanism connected to the discharge end of the annealing furnace, and the laser efficiency improving mechanism is configured to perform laser treatment on the battery piece; the laser treatment mechanism comprises a feeding conveying assembly, a transfer assembly, a conveying platform, an upper electrode module, a laser module, a discharging conveying assembly, and an external power supply, wherein,

[0045] The feeding conveying assembly is configured to receive and convey the battery piece output from the annealing furnace;

[0046] The transfer assembly is used to carry the battery piece to be laser treated from the feeding conveying assembly to the conveying platform located at the feeding station;

[0047] The conveying platform is used to carry the battery piece to be laser treated to the laser station and carry the battery piece after laser treatment to the discharging station; the upper electrode module is located at the laser station, one electrode of the external power supply forms an electrical connection with the front electrode of the battery piece located at the laser station through the upper electrode module, and the other electrode of the external power supply forms an electrical connection with the back electrode of the battery piece located at the laser station through the conveying platform;

[0048] The external power source is used to apply a reverse voltage to the battery piece located at the laser station.

[0049] The laser module is located above the laser station, and is used to perform laser scanning on the battery piece after the external power source applies a reverse voltage to the battery piece located at the laser station. The transfer assembly is also used to carry the battery piece that has completed laser processing from the conveying platform to the unloading conveying assembly.

[0050] Optionally, the battery piece efficiency improving device comprises two laser efficiency improving mechanisms, and the feeding end of the second laser efficiency improving mechanism is connected to the discharging end of the first laser efficiency improving mechanism.

[0051] Further, based on the above-mentioned battery piece efficiency improving device, the two laser efficiency improving mechanisms arranged in sequence can realize continuous laser efficiency improving processing on the battery piece twice.

[0052] The additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0053] The disclosure of the present application will become more fully understood from the detailed description given herein below, and it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the scope of the present application. It should be understood that these drawings are for illustration only and are not intended to limit the scope of the present application in any way. Furthermore, like reference numerals are intended to represent similar components throughout this specification.

[0054] Figure 1 FIG. 1 is a structural schematic diagram of a battery piece efficiency improving device according to an embodiment of the present application;

[0055] Figure 2 FIG. 2 is a top view of an unloading and loading mechanism according to an embodiment of the present application;

[0056] Figure 3 FIG. 3 is a structural schematic diagram of a carrying assembly according to an embodiment of the present application;

[0057] Figure 4 FIG. 4 is a structural schematic diagram of a jacking assembly according to an embodiment of the present application;

[0058] Figure 5 FIG. 5 is a partial structural schematic diagram of a third conveying assembly according to an embodiment of the present application.

[0059] Explanation of Reference Numerals:

[0060] 1, first furnace section; 11, upper furnace chamber; 12, lower furnace chamber; 2, feeding and discharging mechanism; 21, third conveying assembly; 211, third conveying belt; 212, third driving mechanism; 22, bearing platform; 221, first area; 222, second area; 23, carrying assembly; 231, support; 232, carrying part; 24, transverse moving assembly; 241, slide rail; 242, support structure; 25, jacking assembly; 251, driving piece; 252, jacking structure; 3, second furnace section; 31, alarm element; 4, third furnace section; 5, laser efficiency improving mechanism; 6, Bernoulli chuck. DETAILED DESCRIPTION

[0061] Some embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0062] As described in the background, in actual production, when a broken piece accident occurs in the light section of the battery piece annealing furnace, the conveying and lightening and heating treatment of the battery piece annealing furnace need to be suspended, and even the conveying of the workstations before the battery piece annealing furnace needs to be stopped for cleaning and maintenance, which wastes a lot of time and affects the production efficiency of the battery piece.

[0063] Therefore, the present application creatively proposes an annealing furnace and a battery piece efficiency improving device. The annealing furnace comprises a first furnace section, a feeding and discharging mechanism and a second furnace section arranged in sequence along the conveying direction of the battery piece. When it is observed that a broken battery piece appears at the discharging end in the second furnace section, the second furnace section is stopped to facilitate the cleaning and maintenance of the second furnace section. At the same time, the feeding and discharging mechanism arranged between the first furnace section and the second furnace section continuously receives the battery pieces output by the first furnace section, so as to ensure that the first furnace section and the workstations before the first furnace section can continue to run. After the broken battery piece is cleaned, the second furnace section is restarted, and the feeding and discharging mechanism directly provides the battery pieces to the second furnace section, so that the second furnace section can quickly process the battery pieces, ensuring the production efficiency of the battery piece, that is, the running state of the remaining furnace sections is not affected when the second furnace section is stopped, and the battery pieces are quickly provided to the second furnace section after the second furnace section is restarted, finally realizing the improvement of the production efficiency of the battery piece.

[0064] The present application will be described in detail through specific embodiments.

[0065] Embodiment 1

[0066] Reference Figures 1 to 5As shown, the present application provides an annealing furnace, which comprises a first furnace section 1, an upper and lower material mechanism 2, a second furnace section 3 and a third furnace section 4 arranged in sequence along the conveying direction of the battery piece 6, wherein: the first furnace section 1 comprises at least one heating furnace cavity, which is configured to at least implement heating treatment on the battery piece 6; the second furnace section 3 comprises at least one light injection furnace cavity, which is configured to at least implement light injection treatment on the battery piece 6; the third furnace section 4 comprises at least one cooling furnace cavity, which is configured to implement cooling treatment on the battery piece 6; the upper and lower material mechanism 2 is arranged between the first furnace section 1 and the second furnace section 3, and is configured to receive the battery piece 6 from the first furnace section 1 and / or provide the battery piece 6 to the second furnace section 3;

[0067] A first conveying assembly is arranged in the second furnace section 3, and a second conveying assembly is arranged in the third furnace section 4, the first conveying assembly comprises a first conveying belt arranged in a preset direction and a first driving mechanism, the first driving mechanism is used to drive the first conveying belt to convey the battery piece 6, the second conveying assembly comprises a second conveying belt arranged in a preset direction and a second driving mechanism, the second driving mechanism is used to drive the second conveying belt to convey the battery piece 6, and the first conveying belt is respectively connected with the discharge end of the upper and lower material mechanism 2 and the second conveying belt;

[0068] The upper and lower material mechanism 2 comprises a third conveying assembly 21, the third conveying assembly 21 comprises a third conveying belt 211 arranged in a preset direction and a third driving mechanism 212, the third driving mechanism 212 is used to drive the third conveying belt 211 to convey the battery piece 6, and the third conveying belt 211 is respectively connected with the discharge end of the first furnace section 1 and the first conveying belt. More specifically, the third conveying assembly 21 can comprise a plurality of third conveying belts 211 connected in sequence, and each third conveying belt 211 is provided with a third driving mechanism 212. Exemplarily, the third driving mechanism 212 can comprise a bracket, rollers rotatably arranged at both ends of the bracket, a synchronous pulley structure and a servo motor, the third conveying belt 211 is sleeved on the rollers, and the servo motor drives the third conveying belt 211 to rotate through the synchronous pulley structure to convey the battery piece.

[0069] Wherein, referring to Figure 1 As shown, the outer structures of the second furnace section 3 and the third furnace section 4 are integrated, but there is a distinction inside, in order to facilitate the representation, the same dashed box is used to frame the second furnace section 3 and the third furnace section 4. At the same time, in order to facilitate the representation, Figure 1 A schematic view of the battery piece efficiency improving device after rotating 90 degrees in the clockwise direction.

[0070] It should be noted that in the present embodiment, the heating furnace cavity in the first furnace section 1 at least implements heating treatment on the battery piece 6, and the light injection furnace cavity in the second furnace section 3 at least implements light injection treatment on the battery piece 6; of course, in some other examples, the heating furnace cavity can also be additionally provided with a light irradiation module (such as a light irradiation member such as an LED lamp plate) and a cooling module (such as a fan, an air exchange mechanism, etc.) to additionally implement light injection or cooling treatment on the battery piece 6; the light injection furnace cavity can also be additionally provided with a heating module (such as an infrared lamp tube, a resistance wire heater, etc.) or a cooling module (as described above) to additionally implement heating or cooling treatment on the battery piece 6, and the specific treatment functions that can be achieved can be selected according to the actual process requirements.

[0071] In addition, the user can also set the heating furnace cavity in the first furnace section 1 to two or more, to implement continuous heating treatment on the high-speed conveyed battery piece 6; of course, the user can also set other types of furnace cavities in the first furnace section 1, such as adding a certain number of light injection furnace cavities, so as to realize the composite treatment of heating and light injection on the battery piece 6 in the first furnace section 1. Similarly, the light injection furnace cavity in the second furnace section 3 can also be set to two or more, to implement multiple light injection treatments on the battery piece 6, and other types of furnace cavities can also be set in the second furnace section 3, such as adding a certain number of heating furnace cavities.

[0072] In addition, in some cases, the third furnace section 3 can be omitted, for example: the battery piece is free and slowly cooled after light injection treatment, which has a lower risk of hidden cracks compared to a specially set third furnace section 3; or, if a laser efficiency improvement mechanism is set after the annealing furnace, the battery piece is applied with a reverse voltage and laser scanning at a certain temperature, which is beneficial to obtain better optimization of ohmic contact effect, and thus obtain higher power generation efficiency improvement.

[0073] In some examples, the first conveying assembly, the second conveying assembly and the third conveying assembly 21 are all belt conveying mechanisms. In order to adapt to the conveying requirements of the battery piece 6 at different processes, the conveying belts used by the first conveying belt and the second conveying belt can be selected from steel mesh belts or chain link mesh belts and other metal conveying belts, and the conveying belt used by the third conveying belt 211 can be a wear-resistant belt. In addition, the first driving mechanism and the second driving mechanism can each include a rack, a driving member, a roller, a carrier roller, a tensioning assembly, a brake, a backstop, a synchronous pulley and other structures. The roller is used to transmit power and / or change the running direction of the conveying belt. The carrier roller can support the conveying belt and the material arranged thereon, so that the conveying belt and the material run stably and / or transition between conveying belts of different shapes, such as from a groove type to a parallel type, so as to reduce the adhesive stress of the conveying belt. The tensioning assembly can be a screw tensioning assembly or a weight tensioning assembly, which can keep the conveying belt at a necessary tension to prevent the conveying belt from slipping on the roller and control the deflection of the conveying belt. The backstop or brake can prevent the conveying belt from reversing when the conveying belt is stopped under load. The driver can drive the conveying belt to run the battery piece through the synchronous pulley, or the driving end of the driver is directly connected to the roller, which can also drive the roller to rotate and in turn drive the conveying belt to run. The driver can be selected from common motors such as servo motors.

[0074] It can be understood that the first furnace section 1 is provided with a corresponding conveying assembly for inputting and outputting the battery piece 6 into the first furnace section 1.

[0075] Specifically, the first driving mechanism drives the first conveying belt to convey the battery piece 6, so as to receive the battery piece 6 at the feeding end of the second furnace section 3 and output the battery piece 6 at the discharging end of the second furnace section 3. The second driving mechanism drives the second conveying belt to convey the battery piece 6, so as to receive the battery piece 6 at the feeding end of the third furnace section 4 and output the battery piece 6 at the discharging end of the second furnace section 3. When it is observed that there is a damaged battery piece 6 in the second furnace section 3 and / or in the third furnace section 4 and / or at the discharging end of the third furnace section 4, the second furnace section 3 and the third furnace section 4 are stopped, so as to facilitate the cleaning and maintenance of the corresponding positions. At the same time, the third conveying belt 211 driven by the third driving mechanism 212 continuously receives the battery piece 6 output by the first furnace section 1, so as to ensure that the first furnace section 1 and the processes before the first furnace section 1 can continue to run. After the damaged battery piece 6 is cleaned, the second furnace section 3 and the third furnace section 4 are restarted, and the third conveying belt 211 of the feeding and discharging mechanism 2 directly provides the battery piece 6 to the second furnace section 3, so that the second furnace section 3 can quickly process the battery piece 6, thereby ensuring the production efficiency of the battery piece 6. That is, the running state of the remaining furnace sections is not affected when the second furnace section 3 and the third furnace section 4 are stopped, and the battery piece 6 is quickly provided to the second furnace section 3 and the third furnace section 4 after the second furnace section 3 and the third furnace section 4 are restarted, so as to ultimately improve the production efficiency of the battery piece 6.

[0076] It can be understood that the way of observing the second furnace section 3 and / or the third furnace section 4 and / or the discharge end of the third furnace section 4 includes manual and automatic detection. As an example but not limitation, in the embodiment, the detection of the broken battery piece 6 is realized by setting the cooperation between the corresponding structure and the detection element.

[0077] At least one of the second furnace section 3, the third furnace section 4 and the discharge end of the third furnace section 4 is provided with a detection element configured to detect whether the battery piece 6 passing through the detection element is a broken battery piece 6, and the detection element is electrically connected with an alarm element 31 configured to issue a prompt when the detection element detects a broken battery piece 6 in the corresponding furnace section.

[0078] In some examples, the user can set the detection element in the furnace section where the broken pieces are prone to occur in actual production or other corresponding positions to save costs while ensuring the detection effect.

[0079] It can be understood that, in order to improve the comprehensiveness of detection, in the embodiment, the second furnace section 3, the third furnace section 4 and the discharge end of the third furnace section 4 are all provided with detection elements.

[0080] In some examples, the detection element is a high-temperature-resistant photoelectric sensing element or a detection camera to ensure the detection accuracy of the detection element and reduce the possibility of false judgment of the detection element. The alarm element 31 can be an audible and visual alarm to improve the warning effect.

[0081] In addition, in order to cooperate with the detection element, the first conveying belt and the second conveying belt are both provided with at least one detection gap in the preset direction, the detection gap is arranged perpendicular to the conveying surface of the first conveying belt or the second conveying belt to pass the broken pieces of the battery piece 6, the detection element is arranged below the detection gap, and the detection end thereof is arranged opposite to the detection gap.

[0082] When all the furnace sections are in the running state, the battery piece 6 is always in the conveying state, and if the battery piece 6 is broken, the broken pieces will remain on the conveying surface. When the broken pieces flow through the detection gap, the broken pieces will fall through the detection gap. At this time, a collection platform can be arranged below to collect the broken pieces in time, so as to realize accurate detection of the broken battery piece 6.

[0083] In some examples, the feeding and discharging mechanism 2 is further configured to temporarily store the battery piece 6 received by the first furnace section 1 after the detection element detects the broken battery piece 6; and the feeding and discharging mechanism 2 is further configured to feed the temporarily stored battery piece 6 to the second furnace section 3 after cleaning the broken battery piece 6 in the second furnace section 3 and / or the third furnace section 4 and / or the discharge end of the third furnace section 4.

[0084] Specifically, after the second furnace section 3 and the third furnace section 4 are shut down, the battery pieces 6 are still continuously fed in the first furnace section 1, at this time, the battery pieces 6 output from the output end of the first furnace section 1 are continuously received by the feeding and discharging mechanism 2 and temporarily stored, so as to avoid the accumulation of the battery pieces 6 in the first furnace section 1, and at the same time, the battery pieces 6 processed by the first furnace section 1 can be timely input into the second furnace section 3, thereby greatly shortening the time for obtaining the battery pieces 6 after the second furnace section 3 is restarted.

[0085] Further, referring to Figure 2 , in some examples, the feeding and discharging mechanism 2 further includes a carrying platform 22 and a carrying assembly 23, wherein the carrying platform 22 is arranged at least one side of the third conveying belt 211 and is configured to carry the battery pieces 6; the carrying assembly 23 includes a support 231 and a carrying part 232 movable relative to the support 231, and the carrying part 232 is configured to carry the battery pieces 6 from the third conveying belt 211 to the carrying platform 22 according to the signal of the detection element.

[0086] It can be understood that in some cases, for example, the first furnace section 1 is shut down due to failure, or there are no or few battery pieces 6 on the carrying platform 22 due to other reasons, and the battery pieces 6 cannot be timely provided for the second furnace section 3, at this time, the battery pieces 6 from other places need to be called to timely supplement the battery pieces 6 to the carrying platform 22.

[0087] In order to distinguish the battery pieces 6 output from the first furnace section 1 and the battery pieces 6 supplemented from other places, and facilitate the supplement of the battery pieces 6 from other places to the carrying platform 22, referring to Figure 2 , a first area 221 and a second area 222 are arranged on the carrying platform 22, the first area 221 is used to place the battery pieces 6 received by the first furnace section 1, and the second area 222 is used to place the battery pieces 6 supplemented from other places, and the carrying part 232 carries the battery pieces 6 of the third conveying belt 211 to the first area 221 according to the signal of the detection element; at the same time, the carrying part 232 can also carry the battery pieces 6 of the first area 221 and the second area 222 to the first conveying belt through the switching device and other elements, so as to timely provide the battery pieces 6 for the second furnace section 3.

[0088] It can be understood that in order to increase the area of the storage area of the battery pieces 6, at least one carrying platform 22 can be arranged on each side of the width direction of the third conveying belt 211.

[0089] Further, referring to Figure 2 , Figure 3 and Figure 4As shown, in some examples, the carrying platform 22 is provided with a horizontal moving assembly 24, which includes a sliding rail 241 and a support structure 242 for placing the battery piece 6 and in sliding connection with the sliding rail 241 to move the support structure 242 with the battery piece 6 towards or away from the third conveying belt 211; and / or,

[0090] The carrying platform 22 is provided with a jacking assembly 25, which includes a driving member 251 and a jacking structure 252 connected with the driving end of the driving member 251, and the carrying platform 22 is provided with an avoiding hole for avoiding the jacking structure 252, and the driving member 251 is used to drive the jacking structure 252 to move in the vertical direction and jack up the battery piece 6 to a predetermined height.

[0091] In some examples, in order to facilitate the centralized transfer of the battery piece 6, the support structure 242 is a magazine for placing the battery piece 6. When the number of battery pieces 6 on the support structure 242 reaches the upper limit of the capacity, the support structure 242 can be manually moved relative to the sliding rail 241 to remove the battery piece 6. The removed battery piece 6 can be supplemented into other annealing furnaces, or temporarily stored in a storage structure such as a shelf for subsequent replenishment when the battery piece 6 is insufficient in the annealing furnace. In addition, when the battery piece 6 is provided to the second furnace section 3, if the battery piece 6 is insufficient, the battery piece 6 transported from other places can be placed on the support structure 242 to provide the battery piece 6 to the second furnace section 3 in time.

[0092] In addition, in order to facilitate the removal of the battery piece 6 and adjust the distance between the battery piece 6 on the jacking structure 252 and the carrying part 232, the jacking structure 252 can be driven by the driving member 251 to move in the vertical direction, and then the battery piece 6 is jacked up to a predetermined height, so that the worker removes the battery piece 6 or supplements the battery piece 6. In the present embodiment, the jacking structure 252 can be placed on the support structure 242, and the avoiding hole for avoiding the jacking structure is formed on the support structure 242 to improve the cooperation between the jacking structure 252 and the support structure 242. The jacking assembly 25 can also cooperate with the carrying assembly 23 to avoid the movement of the carrying part 232 in the vertical direction or shorten the movement path of the carrying part 232 in the vertical direction, thereby shortening the time spent by the carrying part 232 in carrying the battery piece 6 to the first area 221 and / or the second area 222. The driving member 251 can be an electric cylinder, a pneumatic cylinder or other driving source capable of linear driving.

[0093] In some examples, referring to Figure 2 , Figure 3 and Figure 5As shown, in order to improve the carrying amount of the battery piece 6 per unit time, the loading and unloading mechanism 2 includes at least two carrying assemblies 23, all of which are arranged in a preset direction, and the carrying assembly 23 includes a Bernoulli suction cup; wherein at least one carrying assembly 23; wherein at least one carrying assembly 23 is configured to carry the battery piece 6 on the third conveying belt 211 to the carrying platform 22, and at least one carrying assembly 23 is configured to carry the battery piece 6 on the carrying platform 22 to the third conveying belt 211.

[0094] Specifically, when the third conveying belt 211 starts to transport the battery piece 6, a predetermined position equal to the number of carrying assemblies 23 can be arranged on the third conveying belt 211, so that when all the battery pieces 6 can reach the predetermined position at the same time, the corresponding carrying assembly 23 starts to carry the battery piece 6 at the corresponding preset position. Alternatively, the distance between different predetermined positions can be controlled, so that the same carrying assembly 23 can carry multiple battery pieces 6 at the predetermined positions within a certain time. In addition, after the second furnace section 3 and the third furnace section 4 are restarted, according to the actual production situation, a corresponding number of carrying assemblies 23 are selected to carry the battery piece 6 on the carrying platform 22 to the third conveying belt 211.

[0095] In some examples, the heating furnace cavity, the light injection furnace cavity and the cooling furnace cavity include a top furnace cavity 11 and a bottom furnace cavity 12 that are connected by a snap fit, and after the top furnace cavity 11 and the bottom furnace cavity 12 are connected by a snap fit, a conveying channel is formed for the corresponding conveying assembly to pass through.

[0096] In some examples, the infrared lamp assembly is arranged in the corresponding top furnace cavity 11 and / or bottom furnace cavity 12 of the heating furnace cavity, and the infrared lamp assembly is configured to perform heating treatment on the battery piece 6; and / or, the LED lamp assembly is arranged in the corresponding top furnace cavity 11 and / or bottom furnace cavity 12 of the light injection furnace cavity, and the LED lamp assembly is configured to perform light injection treatment on the battery piece 6, and the LED lamp assembly is attached with a water cooling module; and / or, the air exchange assembly is arranged in the corresponding top furnace cavity 11 and / or bottom furnace cavity 12 of the cooling furnace cavity, and the air exchange assembly includes an air inlet member and an air outlet member, the air inlet member is configured to introduce a gas at a preset temperature into the cooling furnace cavity to cool the battery piece 6, and the air outlet member is configured to extract the gas in the cooling furnace cavity.

[0097] In some examples, at least one of the top furnace cavity 11 and the bottom furnace cavity 12 is also provided with a thermocouple 31 (such as the thermocouple 31 shown in FIG. Figure 1 In order to increase the redundancy of the temperature measurement element to improve the accuracy of the temperature measurement in the furnace section, the thermocouple 31 for temperature measurement can be arranged in the top furnace cavity 11 and the bottom furnace cavity 12 of the corresponding furnace section.

[0098] It can be understood that in order to improve the accuracy of temperature measurement in the furnace section, the redundancy of the temperature measurement element can be increased by arranging the thermocouple 31 for temperature measurement in the top furnace cavity 11 and the bottom furnace cavity 12 of the corresponding furnace section.

[0099] Embodiment 2

[0100] Referring to Figure 1 As shown in FIG. 1, the present application also provides a battery piece efficiency improving device, which comprises the annealing furnace as described above, and further comprises a laser efficiency improving mechanism 5 which is connected to the discharge end of the third furnace section 4, and the laser efficiency improving mechanism 5 is configured to implement laser treatment on the battery piece 6; the laser treatment mechanism comprises a feeding conveying assembly, a transfer assembly, a conveying platform, an upper electrode module, a laser module, a discharging conveying assembly, and an external power supply, wherein,

[0101] The feeding conveying assembly is configured to receive and convey the battery piece 6 output from the third furnace section 4; the transfer assembly is used to carry the battery piece 6 to be laser treated from the feeding conveying assembly to the conveying platform located at the feeding station; the conveying platform is used to carry the battery piece 6 to be laser treated and send it to the laser station, and send the battery piece 6 after laser treatment to the discharging station; the upper electrode module is located at the laser station, and one electrode of the external power supply forms an electrical connection with the front electrode of the battery piece 6 located at the laser station through the upper electrode module, and the other electrode of the external power supply forms an electrical connection with the back electrode of the battery piece 6 located at the laser station through the conveying platform.

[0102] The external power supply is used to apply a reverse voltage to the battery piece 6 located at the laser station.

[0103] The laser module is located above the laser station, and the laser module is used to perform laser scanning on the battery piece 6 after the external power supply applies a reverse voltage to the battery piece 6 located at the laser station; the transfer assembly is also used to carry the battery piece 6 after laser treatment from the conveying platform to the discharging conveying assembly.

[0104] Further, in some examples, the battery piece efficiency improving device comprises two laser efficiency improving mechanisms 5, and the feeding end of the second laser efficiency improving mechanism 5 is connected to the discharging end of the first laser efficiency improving mechanism 5, so that each battery piece 6 is subjected to twice laser efficiency improving treatment.

[0105] It can be understood that the user can set three or more laser efficiency improving mechanisms 5 according to needs to realize multiple laser efficiency improving treatment on the battery piece 6.

[0106] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0107] Furthermore, the terms "first", "second", etc. are used herein for descriptive purposes only and cannot be construed as indicating or implying relative importance or an indicated number of features. Thus, a feature defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0108] Although the embodiments of the present application have been shown and described above, it is to be understood that the above-described embodiments are merely exemplary and are not to be construed as limiting the present application, and those skilled in the art can make changes, modifications, substitutions and variations to the above-described embodiments within the scope of the present application.

Claims

1. An annealing furnace, characterized by, The annealing furnace comprises a first furnace section, an upper and lower material mechanism and a second furnace section arranged in sequence along the conveying direction of the battery sheet. The first furnace section comprises at least one heating furnace cavity configured to at least perform heating treatment on the battery sheet. The second furnace section comprises at least one light injection furnace cavity configured to at least perform light injection treatment on the battery sheet. The upper and lower material mechanism is arranged between the first furnace section and the second furnace section and is configured to receive the battery sheet from the first furnace section and / or provide the battery sheet to the second furnace section. The second furnace section is provided with a first conveying assembly comprising a first conveying belt arranged in a predetermined direction and a first driving mechanism for driving the first conveying belt to convey the battery sheet. The upper and lower material mechanism further comprises a third conveying assembly comprising a third conveying belt arranged in a predetermined direction and a third driving mechanism for driving the third conveying belt to convey the battery sheet, and the third conveying belt is respectively connected to the discharge end of the first furnace section and the first conveying belt.

2. The annealing furnace according to claim 1, characterized in that, The annealing furnace further comprises a third furnace section connected to the second furnace section, the third furnace section comprises at least one cooling furnace cavity configured to perform cooling treatment on the battery sheet, and the third furnace section is provided with a second conveying assembly comprising a second conveying belt arranged in a predetermined direction and a second driving mechanism for driving the second conveying belt to convey the battery sheet, and the first conveying belt is respectively connected to the discharge end of the upper and lower material mechanism and the second conveying belt.

3. The annealing furnace according to claim 2, characterized in that At least one of the second furnace section, the third furnace section and the discharge end of the third furnace section is provided with a detection element configured to detect whether the battery sheet passing through the detection element is a damaged battery sheet, and the detection element is electrically connected to an alarm element configured to issue a prompt when the detection element detects a damaged battery sheet in the corresponding furnace section.

4. The annealing furnace according to claim 3, characterized in that The upper and lower material mechanism is further configured to temporarily store the battery sheet received from the first furnace section when the detection element detects a damaged battery sheet, and the upper and lower material mechanism is further configured to load the temporarily stored battery sheet to the second furnace section after cleaning the damaged battery sheet in the second furnace section and / or the third furnace section and / or the discharge end of the third furnace section.

5. The annealing furnace of claim 3, wherein The first conveying belt and the second conveying belt are each provided with at least one detection gap in the predetermined direction, the detection gap is arranged perpendicular to the conveying surface of the first conveying belt or the second conveying belt to allow the fragments of the battery sheet to pass through, the detection element is arranged below the detection gap, and the detection end of the detection element is arranged opposite to the detection gap.

6. The annealing furnace of claim 3, wherein The detection element is a high-temperature-resistant photoelectric sensing element or a detection camera.

7. The annealing furnace of claim 3, wherein The upper and lower material mechanism further comprises a carrying platform and a carrying assembly, wherein: The carrying platform is arranged on at least one side of the third conveying belt and is configured to carry the battery sheet. The carrying assembly comprises a support, a carrying part movable relative to the support, and the carrying part is configured to carry the battery piece from the third conveying belt to the bearing platform according to the signal of the detection element.

8. The annealing furnace of claim 7, wherein The bearing platform is provided with a transverse moving assembly, which comprises a sliding rail and a support structure for placing the battery piece and is in sliding connection with the sliding rail, so that the support structure loaded with the battery piece is close to or away from the third conveying belt; and / or, The bearing platform is provided with a jacking assembly, which comprises a driving member and a jacking structure connected with the driving end of the driving member, and the bearing platform is provided with an avoiding hole for avoiding the jacking structure, and the driving member is used to drive the jacking structure to move in the vertical direction and lift the battery piece to a predetermined height.

9. The annealing furnace of claim 7, wherein The feeding and discharging mechanism comprises at least two carrying assemblies, all the carrying assemblies are arranged at intervals along the preset direction, and the carrying assembly comprises a Bernoulli suction cup; At least one of the carrying assemblies is configured to carry the battery piece on the third conveying belt to the bearing platform, and at least one of the carrying assemblies is configured to carry the battery piece on the bearing platform to the third conveying belt.

10. The annealing furnace of claim 2, wherein The heating furnace cavity, the light injection furnace cavity and the cooling furnace cavity each comprise an upper furnace cavity and a lower furnace cavity connected by buckling, and the upper furnace cavity and the lower furnace cavity form a conveying channel for the corresponding conveying assembly after buckling.

11. The annealing furnace of claim 10, wherein The corresponding upper furnace cavity and / or lower furnace cavity of the heating furnace cavity is provided with an infrared lamp assembly, which is configured to perform heating treatment on the battery piece; And / or, The corresponding upper furnace cavity and / or lower furnace cavity of the light injection furnace cavity is provided with an LED lamp assembly, which is configured to perform light injection treatment on the battery piece, and the LED lamp assembly is attached with a water cooling module; And / or, The corresponding upper furnace cavity and / or lower furnace cavity of the cooling furnace cavity is provided with an air exchange assembly, which comprises an air inlet member and an air outlet member, the air inlet member is configured to introduce a gas at a predetermined temperature into the cooling furnace cavity to cool the battery piece, and the air outlet member is configured to extract the gas in the cooling furnace cavity.

12. The annealing furnace of claim 10, wherein At least one of the upper furnace cavity and the lower furnace cavity is also provided with a thermocouple for temperature measurement.

13. A battery cell efficiency improving device comprising the annealing furnace according to any one of claims 1 to 12, characterized in that, The battery piece efficiency improving device further comprises a laser efficiency improving mechanism connected with the discharge end of the annealing furnace, and the laser efficiency improving mechanism is configured to perform laser treatment on the battery piece; the laser treatment mechanism comprises a feeding conveying assembly, a transfer assembly, a conveying platform, an upper electrode module, a laser module, a discharging conveying assembly and an external power supply, wherein The feeding conveying assembly is configured to receive and convey the battery piece output from the annealing furnace; The transfer assembly is used to carry the battery piece to be laser treated from the feeding conveying assembly to the conveying platform at the feeding station; The conveying platform is used to convey the battery piece to be laser treated to the laser treatment station; The conveying platform is used for carrying the battery piece to be laser processed and sending the battery piece to be laser processed to the laser station, and sending the battery piece after laser processing to the unloading station; the upper electrode module is located at the laser station, one electrode of the external power supply forms an electrical connection with the front electrode of the battery piece at the laser station through the upper electrode module, and the other electrode of the external power supply forms an electrical connection with the back electrode of the battery piece at the laser station through the conveying platform; The external power supply is used for applying a reverse voltage to the battery piece at the laser station; The laser module is located above the laser station, and is used for laser scanning of the battery piece after the external power supply applies a reverse voltage to the battery piece at the laser station; and the transfer assembly is further used for carrying the battery piece after laser processing from the conveying platform to the unloading conveying assembly.

14. The cell efficiency improving apparatus according to claim 13, characterized in that, The battery piece efficiency improving device comprises two laser efficiency improving mechanisms, and the feeding end of the second laser efficiency improving mechanism is connected with the discharging end of the first laser efficiency improving mechanism.

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