CN111151555A - Pyrolysis equipment and heat treatment method of battery assembly - Google Patents
Pyrolysis equipment and heat treatment method of battery assembly Download PDFInfo
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- CN111151555A CN111151555A CN202010046382.7A CN202010046382A CN111151555A CN 111151555 A CN111151555 A CN 111151555A CN 202010046382 A CN202010046382 A CN 202010046382A CN 111151555 A CN111151555 A CN 111151555A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 90
- 238000000197 pyrolysis Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000005022 packaging material Substances 0.000 claims abstract description 27
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 239000002912 waste gas Substances 0.000 claims abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims description 36
- 239000007789 gas Substances 0.000 claims description 14
- 238000009423 ventilation Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 6
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 9
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 229910021419 crystalline silicon Inorganic materials 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 239000000326 ultraviolet stabilizing agent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B2101/00—Type of solid waste
- B09B2101/02—Gases or liquids enclosed in discarded articles, e.g. aerosol cans or cooling systems of refrigerators
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Abstract
The invention discloses pyrolysis equipment and a heat treatment method of a battery pack, which are used for carrying out pyrolysis treatment on a packaging material of the battery pack, wherein the pyrolysis equipment comprises the following components: a pyrolysis furnace; the conveying device comprises a conveying belt for conveying the battery component, and the conveying belt extends from the inlet of the pyrolysis furnace to the outlet of the pyrolysis furnace; the heating device comprises a heating pipe and a heating cover, wherein the heating pipe is used for heating the battery component on the conveying belt, and the heating cover covers one side of the heating pipe, which is far away from the conveying belt; and the air interchangers are arranged at intervals along the conveying direction of the conveying belt, each air interchanger is arranged to be capable of introducing nitrogen or air towards the battery pack so as to generate a pyrolysis reaction with the packaging material of the battery pack, and the waste gas generated by the pyrolysis reaction of the packaging material in the heating cover is led out. According to the technical scheme provided by the invention, the packaging material of the battery component is removed in a pyrolysis manner, the time consumption is short, and the recovery treatment efficiency is high.
Description
Technical Field
The invention belongs to the technical field of environmental protection of waste material recycling treatment, and particularly relates to pyrolysis equipment and a heat treatment method of a battery pack.
Background
EVA (ethylene-vinyl acetate copolymer) is the most common material in the solar cell packaging process at present, and is mainly prepared by adding various additives such as an ultraviolet absorbent, an ultraviolet stabilizer, an antioxidant, a cross-linking agent and the like into an EVA base material. EVA is classified into a conventional type and a fast curing type (also called a fast curing type) according to the difference of added cross-linking agents, and the main difference is that the time required for curing is different. The EVA can generate cross-linking reaction in the curing process to form a network structure of blue and green fibers, and has good sealing effect on the solar cell.
However, how to remove the EVA in the recycling link after the waste crystalline silicon solar panel is scrapped achieves effective separation of the glass, the solar panel and the back panel so as to carry out classified recycling, and research is less. At present, the EVA is usually dissolved and separated by using an organic solvent, but the treatment in a dissolving and separating mode takes a long time, about 7-10 days, and has high cost, and the organic solvent is easy to volatilize and easily causes harm to the environment.
Disclosure of Invention
In view of the above, the present invention is directed to a pyrolysis apparatus and a thermal treatment method for a battery assembly, so as to solve the problem in the prior art that the discarded solar cell panel is difficult to recycle.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a pyrolysis device for carrying out pyrolysis treatment on a packaging material of a battery assembly, which is characterized by comprising:
a pyrolysis furnace;
a conveyor comprising a conveyor belt for conveying battery components, the conveyor belt extending from an inlet of the pyrolysis furnace to an outlet of the pyrolysis furnace;
the heating device comprises a heating pipe and a heating cover, the heating pipe is used for heating the battery component on the conveying belt, and the heating cover covers one side of the heating pipe, which is far away from the conveying belt;
breather follows the direction of delivery interval of conveyer belt is provided with a plurality ofly breather, every breather sets up to can the orientation battery pack lets in nitrogen gas or air in order to with battery pack's packaging material produces the pyrolytic reaction, and will in the heating mantle by the waste gas that packaging material pyrolytic reaction produced is derived.
Preferably, breather is including the inner tube that can heat conduction and cover the outer tube in the inner tube outside, the one end of inner tube stretches into in the heating mantle with the waste gas in the heating mantle is derived, the outer tube with space intercommunication between the inner tube has intake pipe and outlet duct, the intake pipe to the outer tube with space input nitrogen gas or air between the inner tube, the outlet duct will the outer tube with gas orientation between the inner tube battery pack derives.
Preferably, the ventilation device further comprises a plurality of air passing discs arranged around the inner pipe, and the air passing discs are positioned in the space between the inner pipe and the outer pipe and are arranged at intervals along the axial direction of the inner pipe; wherein, a plurality of openings are arranged on each air passing disc.
Preferably, a plurality of air passing discs are fixed on the inner pipe in a tight fit mode;
or a plurality of clamping grooves are formed in the outer surface of the inner pipe at intervals along the axial direction, and the air passing discs are clamped in the clamping grooves respectively.
Preferably, the openings on the air passing disc are provided with at least two circles around the inner pipe, and the openings of two adjacent circles are arranged in a staggered manner.
Preferably, the upper and lower sides of the upper layer conveyor belt for conveying the battery assembly of the conveyor belt are respectively provided with the heating device.
Preferably, along the conveying direction of the conveying belt, a temperature rising part, a constant temperature part and a temperature reducing part are sequentially arranged in the pyrolysis furnace;
in the temperature raising section, a heating temperature of the heating device increases in a conveying direction of the conveyor belt;
in the constant temperature section, a heating temperature of the heating device is kept constant;
in the cooling portion, the heating temperature of the heating device is reduced along the conveying direction of the conveying belt.
Preferably, the inside cooling portion that is located of still being provided with of pyrolysis oven just is close to cooling portion downstream of the cooling portion the export of pyrolysis oven, cooling portion is provided with cooling device, the conveyer belt will battery pack carries to the cooling portion cooling.
Preferably, the conveying device further comprises a driving roller and a driven roller, and the conveying belt is supported and operated by the driving roller and the driven roller; wherein the content of the first and second substances,
the conveying belt is a steel belt, and a supporting roller for supporting the lower conveying belt is arranged at the bottom side of the lower conveying belt of the conveying belt;
and/or the conveying device further comprises pressing rollers which are respectively arranged close to the driving roller and the driven roller, and the pressing rollers are pressed on the outer side of the conveying belt to increase the wrap angle of the conveying belt on the driving roller and the driven roller;
and/or the conveying device further comprises a tension wheel attached to the inner side of the conveying belt to tension the conveying belt;
and/or the conveying device further comprises a guide plate and a guide wheel, wherein the guide plate is positioned on the lower side of the lower layer conveying belt of the conveying belt to guide the conveying belt, and the guide wheel is positioned on the inner side of the conveying belt to press the conveying belt on the guide plate;
and/or the conveying device further comprises a support rod supported on the lower surface of the upper layer conveying belt of the conveying belt, and the support rod extends along the conveying direction of the conveying belt.
According to another aspect of the present invention, there is also provided a battery assembly heat treatment method, the method including:
conveying the battery assembly to be pyrolyzed from an inlet of the pyrolysis furnace to an outlet of the pyrolysis furnace by a conveying belt;
in the conveying process of the battery assembly, the heating device in the pyrolysis furnace heats the battery assembly, the ventilation device leads nitrogen or air towards the battery assembly to generate pyrolysis reaction with the packaging material of the battery assembly, and the waste gas generated by the pyrolysis reaction of the packaging material is led out.
According to the technical scheme provided by the invention, the packaging material (usually EVA) of the battery component is removed in a pyrolysis treatment mode, so that the effective separation of the battery panel and the packaging material is realized, the scrapped waste crystalline silicon solar panel can be recycled, the time for removing the packaging material in the pyrolysis mode is short, and the recycling treatment efficiency is high.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic view showing the construction of a pyrolysis apparatus according to an embodiment of the present invention;
FIG. 2 is a front view of the pyrolysis apparatus shown in FIG. 1;
FIG. 3 is a schematic structural view of a conveying device;
FIG. 4 is an enlarged view of a portion of FIG. 3;
FIG. 5 is a front view of the delivery device shown in FIG. 3;
FIG. 6 is a schematic structural view of a conveying apparatus according to another embodiment of the present invention;
FIG. 7 is a schematic structural view of a heating apparatus;
FIG. 8 is a schematic view of the structure of the cooling device;
FIG. 9 is a schematic view of the ventilator;
fig. 10 is a schematic view of the ventilation device in fig. 9 with the outer tube removed;
FIG. 11 is a schematic structural view of a gas passing disk;
fig. 12 is a schematic structural view of the inner tube.
Description of reference numerals:
1-a pyrolysis furnace; 11-a temperature raising unit; 12-a constant temperature part; 13-a cooling part; 14-a cooling section; 2-a conveying device; 21-a conveyor belt; 22-a drive roll; 23-a driven roller; 24-a pressure roller; 25-a tension roller; 251-an elastic force application part; 26-a guide roll; 27-a guide plate; 28-a support bar; 29-supporting rolls; 3-a heating device; 31-heating tube; 32-a heating mantle; 4-a cooling device; 41-cooling cover; 42-a cooling fan; 5-a ventilation device; 51-an outer tube; 52-inner tube; 521-an air inlet; 522-air outlet; 53-inlet pipe; 54-air outlet pipe; 55-air passing disk.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may also be otherwise oriented, such as by rotation through 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly.
The present invention provides a pyrolysis apparatus for performing pyrolysis treatment of a packaging material of a battery module, as shown in fig. 1 and 2, the pyrolysis apparatus including:
a pyrolysis furnace 1 (only the frame of the pyrolysis furnace is shown in the figure);
a conveyor 2, the conveyor 2 comprising a conveyor belt 21 for conveying battery components, the conveyor belt 21 extending from an inlet of the pyrolysis furnace 1 to an outlet of the pyrolysis furnace 1;
the heating device 3 comprises a heating pipe 31 for heating the battery components on the conveying belt 21 and a heating cover 32 covering one side of the heating pipe 31, which is far away from the conveying belt 21;
According to the technical scheme provided by the invention, the packaging material (usually EVA) of the battery component is removed in a pyrolysis treatment mode, so that the effective separation of the battery panel and the packaging material is realized, and the waste crystalline silicon solar panel can be recycled after being scrapped. And the time consumption for removing the packaging material by a pyrolysis mode is short, and the recovery treatment efficiency is high.
In a preferred embodiment of the present invention, a plurality of heating devices 3 are arranged in sequence along the conveying direction of the conveyor belt 21. And preferably, the heating devices 3 are respectively provided on the upper and lower sides of the upper layer conveyor belt for conveying the battery modules of the conveyor belt 21.
The specific structure of the heating device 3 is shown in fig. 7, and includes a heating mantle 32 and a plurality of heating pipes 31 located in the heating mantle 32, wherein two opposite sides of the heating mantle 32 are bent toward the conveyor belt 21, and two opposite ends of each heating pipe 31 are respectively mounted on two opposite sides of the heating mantle 32.
The ventilation device 5 is provided with a gas introduction pipe and a gas discharge pipe which are communicated with the inside of the heating cover 32 above the conveyor belt 21, so as to introduce new nitrogen or air into the heating cover 32 and discharge the waste gas generated by pyrolysis.
Specifically, as shown in fig. 9 and 10, the ventilation device 5 includes an inner tube 52 capable of conducting heat and an outer tube 51 sleeved outside the inner tube 52, and an air inlet 521 at one end of the inner tube 52 is communicated to the heating mantle 32 of the heating device 3 to supply the exhaust gas in the heating mantle 32. As shown in fig. 9 and 12, an air inlet 521 and an air outlet 522 are respectively formed at two ends of the inner tube 52, a flange is disposed at the air inlet 521, and the inner tube 52 may be fixed on an opening of the heating mantle 32 through the flange to communicate with the inside of the heating mantle 32; an air inlet pipe 53 and an air outlet pipe 54 are communicated with the space between the outer pipe 51 and the inner pipe 52, the air inlet pipe 53 is used for inputting nitrogen or air into the space between the outer pipe 51 and the inner pipe 52, and the air outlet pipe 54 (which can be further connected with a pipeline communicated with the interior of the heating cover 32) is used for guiding the gas between the outer pipe 51 and the inner pipe 52 out towards the battery components on the conveying belt 21. More specifically, the air inlet pipe 53 is disposed at one end of the outer pipe 51 far from the heating cover 32 and is respectively provided with air inlet pipes 53 at opposite sides of the outer pipe 51; the outlet pipe 54 is provided at one end of the outer pipe 51 adjacent to the heating mantle 32 and the outlet pipes 53 are provided at opposite sides of the outer pipe 51, respectively.
The inner pipe 52 is configured to conduct heat, and can conduct heat generated by the exhaust gas flowing through the inner pipe 52 to the newly introduced gas between the inner pipe 52 and the outer pipe 51, so as to increase the temperature of the newly introduced nitrogen or air, which is beneficial to increasing the speed of the pyrolysis reaction.
In addition, as shown in fig. 10, the ventilation device 3 further includes a plurality of air passing disks 55 disposed around the inner tube 52, the plurality of air passing disks 55 being located in a space between the inner tube 52 and the outer tube 51 and being arranged at intervals in the axial direction of the inner tube 52; wherein, be provided with a plurality of trompils on every gas disk 55 for the gas between inner tube 52 and outer tube 51 flows through gas disk 55, and the speed of flow slows down and can carry out the heat exchange with the waste gas in inner tube 52 better, can make gaseous intensive mixing moreover, so that heat distribution is even.
Further, a plurality of air passing discs 55 may be fixed to the inner tube 52 by a tight fit. A plurality of slots may be formed in the outer surface of the inner tube 52 at intervals in the axial direction, and the plurality of air passing disks 55 may be respectively fixed in the slots.
The openings in the air-over plate 55 may be arranged in a variety of ways. Preferably, as shown in fig. 11, the opening of each air passing disk 55 is provided with at least two circles around the inner tube 52, and the openings of two adjacent circles are arranged in a staggered manner.
In the present embodiment, as shown in fig. 1 and 2, a temperature raising unit 11, a constant temperature unit 12, and a temperature lowering unit 13 are provided in this order inside the pyrolysis furnace 1 along the conveying direction of the conveyor belt 21;
in the temperature increasing section 11, the heating temperature of the heating device 3 increases in the conveying direction of the conveyor belt 21;
in the constant temperature section 12, the heating temperature of the heating device 3 is kept constant;
in the temperature lowering section 13, the heating temperature of the heating device 3 is lowered in the conveying direction of the conveyor belt 21.
Specifically, in the process that battery pack was carried by conveyer belt 21 from the entry of pyrolysis oven 1 inwards, battery pack passes through heating up portion 11 in proper order, constant temperature portion 12, cooling portion 13, battery pack rises gradually at heating up portion 11 temperature, the temperature remains invariable after reaching constant temperature portion 12, battery pack's packaging material carries out the most effective pyrolytic reaction this moment, when carrying to cooling portion 13, most pyrolysis of battery pack's packaging material finishes, the temperature reduces gradually in cooling portion 13's transportation process, prepare for going out the stove.
In order to effectively carry out the pyrolysis reaction of the battery assembly in the conveying process, the lengths of the temperature rising part 11, the constant temperature part 12 and the temperature reducing part 13 and the temperatures of the temperature rising part 11, the constant temperature part 12 and the temperature reducing part 13 can be adjusted according to actual conditions, and the conveying speed of the conveying belt 21 can be adjusted, wherein the slower the conveying speed of the conveying belt 21 is, the more sufficient the pyrolysis of the battery assembly is relative to the condition that the conveying speed is high.
In addition, a cooling part 14 located at the downstream of the temperature lowering part 13 and close to the outlet of the pyrolysis furnace 1 is further provided in the pyrolysis furnace 1, a cooling device is provided in the cooling part 14, and the battery pack is conveyed to the cooling part 14 by the conveyor belt 21, cooled and then sent out of the pyrolysis furnace 1.
Wherein, the cooling device 4 can be cooled by air cooling or water cooling. In the present embodiment, the cooling device 4 cools the battery pack by air cooling, and specifically, as shown in fig. 8, the cooling device 4 includes a cooling cover 41 and a cooling fan 42 provided on the cooling cover 41 and blowing air to the battery pack.
Next, the conveying device 2 for conveying the battery pack in the present embodiment will be described in detail.
Since the conveying device 2 conveys the battery pieces in the pyrolysis furnace 1, the conveying device 2 needs to meet the environmental requirement of high temperature resistance.
The concrete structure of the conveying device 2 is shown in fig. 3-6, the conveying device 2 comprises a conveying belt 21, a driving roller 22 and a driven roller 23, the driving roller 22 is driven by a driving device to rotate, and the conveying belt 21 is supported by the driving roller 22 and the driven roller 23 to run; the conveyor belt 21 is a steel belt having a high temperature resistance.
Since the steel belt is made of steel material, and is resistant to high temperature, but is heavier than a general conveyor belt, in order to avoid the lower layer conveyor belt of the conveyor belt 21 from seriously falling down in the actual design, a support roller 29 (as shown in fig. 6) for supporting the lower layer conveyor belt is provided on the bottom side of the lower layer conveyor belt of the conveyor belt 21 to support the lower layer conveyor belt, and a plurality of support rollers 29 are provided at intervals along the extending direction of the lower layer conveyor belt.
Preferably, as shown in fig. 3 and 4, the conveying device 2 further includes a pressing roller 24 disposed adjacent to the driving roller 22 and the driven roller 23, respectively, and the pressing roller 24 presses against the outer side of the conveying belt 21 to increase the wrap angle of the conveying belt 21 on the driving roller 22 and the driven roller 23, so that the contact area of the conveying belt 21 with the driving roller 22 and the driven roller 23, respectively, can be increased to prevent the conveying belt 21 from slipping during conveying.
Preferably, the conveying device 2 further includes a tension wheel 25 attached to the inner side of the conveying belt 21 to tension the conveying belt 21. By providing the tensioning wheel 25, the conveyor belt 21 can be prevented from running down or loosening, so that the bending of the heavy steel belt can be prevented, and the damage of the bent steel belt to the conveyed battery piece can be avoided. Preferably, the number of the tension pulleys 25 is two, and the two tension pulleys 25 are symmetrically arranged, so that the tension stress of the conveying belt 21 can be ensured to be uniform, and the bending and slipping of the steel conveying belt can be further avoided.
More preferably, the conveying device 2 may further include an elastic applying portion 251 corresponding to the tension wheel 25, as shown in fig. 6, the elastic applying portion 251 is disposed at an outer side edge of the corresponding tension wheel 25, and the tension degree of the conveying belt 21 is changed by the elastic applying portion 251 acting on the corresponding tension wheel 25 to change the position of the tension wheel 25.
Preferably, the conveying device 2 may further include a guide plate 27 and a guide wheel 26, the guide plate 27 is located at the lower side of the lower layer of the conveying belt 21 to guide the conveying belt 21, and the guide wheel 26 is located at the inner side of the conveying belt 21 to press the conveying belt 21 against the guide plate 27. Specifically, as shown in fig. 3 and 4, guide plates 27 are respectively provided at opposite ends of the lower layer conveyor belt of the conveyor belt 21 (of course, the guide plates 27 may be provided at other positions), stopper portions for stopping the deviation of the conveyor belt 21 are provided at opposite sides of the guide plates 27 to prevent the deviation of the conveyor belt, guide wheels 27 are provided at positions close to the guide plates 27 inside the conveyor belt 21, the guide wheels 7 are pressed against the lower layer conveyor belt to make the lower layer conveyor belt adhere to the guide plates 27, and the slipping or deviating conveyor belt 21 can be corrected under the supporting and guiding effects of the guide plates 27.
In addition, the conveying device further comprises a support rod 28 supported on the lower surface of the upper layer conveying belt of the conveying belt 21, as shown in fig. 6, the support rod 28 extends along the conveying direction of the conveying belt 21, and can support the upper layer conveying belt of the conveying belt 21 to prevent the conveyed battery pack from being damaged due to the underswing or bending of the upper layer conveying belt.
The conveying device 2 provided in the embodiment conveys the battery pieces through the steel belt, meets the conveying requirement of a high-temperature environment, and enables the conveying belt 21 to stably run through the arrangement of the supporting roller 29, the supporting rod 28, the guide plate 27 and the tensioning wheel 25, so that the effective conveying of the battery assembly is ensured.
According to another aspect of the present invention, there is also provided a heat treatment method for a battery assembly, the method including:
conveying the battery assembly to be pyrolyzed from the inlet of the pyrolysis furnace 1 to the outlet of the pyrolysis furnace 1 by the conveyor belt 21;
in the conveying process of the battery assembly, the heating device 3 in the pyrolysis furnace heats the battery assembly, the ventilation device 5 introduces nitrogen or air towards the battery assembly to generate pyrolysis reaction with the packaging material of the battery assembly, and the waste gas generated by the pyrolysis reaction of the packaging material is led out.
The method for heat treatment of a battery assembly may be performed by using the pyrolysis device, and the specific process of performing the method for heat treatment of the battery assembly by using the pyrolysis device is described above, and is not described herein again.
It should be understood by those of ordinary skill in the art that the specific constructions and processes illustrated in the foregoing detailed description are exemplary only, and are not limiting. Furthermore, the various features shown above can be combined in various possible ways to form new solutions, or other modifications, by a person skilled in the art, all falling within the scope of the present invention.
Claims (10)
1. A pyrolysis apparatus for performing pyrolysis treatment of a packaging material of a battery assembly, comprising:
a pyrolysis furnace;
a conveyor comprising a conveyor belt for conveying battery components, the conveyor belt extending from an inlet of the pyrolysis furnace to an outlet of the pyrolysis furnace;
the heating device comprises a heating pipe and a heating cover, the heating pipe is used for heating the battery component on the conveying belt, and the heating cover covers one side of the heating pipe, which is far away from the conveying belt;
breather follows the direction of delivery interval of conveyer belt is provided with a plurality ofly breather, every breather sets up to can the orientation battery pack lets in nitrogen gas or air in order to with battery pack's packaging material produces the pyrolytic reaction, and will in the heating mantle by the waste gas that packaging material pyrolytic reaction produced is derived.
2. The pyrolysis apparatus of claim 1, wherein the ventilation device comprises an inner tube capable of conducting heat and an outer tube sleeved outside the inner tube, one end of the inner tube extends into the heating hood to guide out waste gas in the heating hood, a space between the outer tube and the inner tube is communicated with an air inlet tube and an air outlet tube, the air inlet tube inputs nitrogen or air into the space between the outer tube and the inner tube, and the air outlet tube guides out gas between the outer tube and the inner tube towards the battery assembly.
3. The pyrolysis apparatus of claim 2, wherein the air interchanger further comprises a plurality of air passing disks disposed around the inner tube, the plurality of air passing disks being located in a space between the inner tube and the outer tube and being arranged at intervals in an axial direction of the inner tube; wherein, a plurality of openings are arranged on each air passing disc.
4. The pyrolysis apparatus of claim 3, wherein the plurality of gas passing disks are fixed on the inner tube by means of tight fit;
or a plurality of clamping grooves are formed in the outer surface of the inner pipe at intervals along the axial direction, and the air passing discs are clamped in the clamping grooves respectively.
5. The pyrolysis apparatus of claim 3, wherein the openings in the gas passing tray are provided in at least two circles around the inner pipe, and the openings of two adjacent circles are staggered.
6. The pyrolysis apparatus according to claim 1, wherein upper and lower sides of an upper layer conveyor belt of the conveyor belt for conveying the cell assembly are provided with the heating devices, respectively.
7. The pyrolysis apparatus according to claim 1, wherein a temperature raising portion, a constant temperature portion, and a temperature lowering portion are provided in this order inside the pyrolysis furnace in a conveying direction of the conveyor belt;
in the temperature raising section, a heating temperature of the heating device increases in a conveying direction of the conveyor belt;
in the constant temperature section, a heating temperature of the heating device is kept constant;
in the cooling portion, the heating temperature of the heating device is reduced along the conveying direction of the conveying belt.
8. The pyrolysis apparatus according to claim 7, wherein a cooling portion is further provided inside the pyrolysis furnace downstream of the temperature reduction portion and near an outlet of the pyrolysis furnace, the cooling portion is provided with a cooling device, and the conveyor belt conveys the battery assembly to the cooling portion for cooling.
9. The pyrolysis apparatus of any one of claims 1 to 8, wherein the conveying device further comprises a driving roller and a driven roller, and the conveying belt is supported and operated by the driving roller and the driven roller; wherein the content of the first and second substances,
the conveying belt is a steel belt, and a supporting roller for supporting the lower conveying belt is arranged at the bottom side of the lower conveying belt of the conveying belt;
and/or the conveying device further comprises pressing rollers which are respectively arranged close to the driving roller and the driven roller, and the pressing rollers are pressed on the outer side of the conveying belt to increase the wrap angle of the conveying belt on the driving roller and the driven roller;
and/or the conveying device further comprises a tension wheel attached to the inner side of the conveying belt to tension the conveying belt;
and/or the conveying device further comprises a guide plate and a guide wheel, wherein the guide plate is positioned on the lower side of the lower layer conveying belt of the conveying belt to guide the conveying belt, and the guide wheel is positioned on the inner side of the conveying belt to press the conveying belt on the guide plate;
and/or the conveying device further comprises a support rod supported on the lower surface of the upper layer conveying belt of the conveying belt, and the support rod extends along the conveying direction of the conveying belt.
10. A method of thermally treating a battery assembly, the method comprising:
conveying the battery assembly to be pyrolyzed from an inlet of the pyrolysis furnace to an outlet of the pyrolysis furnace by a conveying belt;
in the conveying process of the battery assembly, the heating device in the pyrolysis furnace heats the battery assembly, the ventilation device leads nitrogen or air towards the battery assembly to generate pyrolysis reaction with the packaging material of the battery assembly, and the waste gas generated by the pyrolysis reaction of the packaging material is led out.
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