CN113964408A - Process for utilizing and disassembling CTP battery pack monomer echelon - Google Patents
Process for utilizing and disassembling CTP battery pack monomer echelon Download PDFInfo
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- CN113964408A CN113964408A CN202111068588.0A CN202111068588A CN113964408A CN 113964408 A CN113964408 A CN 113964408A CN 202111068588 A CN202111068588 A CN 202111068588A CN 113964408 A CN113964408 A CN 113964408A
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- battery pack
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- monomers
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- 239000000178 monomer Substances 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000007710 freezing Methods 0.000 claims abstract description 19
- 230000008014 freezing Effects 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000853 adhesive Substances 0.000 claims abstract description 14
- 230000001070 adhesive effect Effects 0.000 claims abstract description 14
- 238000003801 milling Methods 0.000 claims description 9
- 239000003507 refrigerant Substances 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 2
- 239000003292 glue Substances 0.000 abstract description 3
- 239000000084 colloidal system Substances 0.000 description 10
- 238000001816 cooling Methods 0.000 description 10
- 230000008901 benefit Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/54—Reclaiming serviceable parts of waste accumulators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a CTP battery pack monomer echelon utilization disassembling process which comprises the steps of pretreating a CTP battery pack to remove mechanical connection among monomers, freezing the pretreated CTP battery pack, applying impact load to the frozen battery pack to separate the monomers from the battery pack, wiping surface moisture of the separated monomers, placing the separated monomers in a closed space with good heat conduction for temperature return, immersing an adhesive surface of the heated monomer in hot water at 60-65 ℃ for a period of time, and then peeling the adhesive from the monomers. The invention reduces time and difficulty for disassembling after freezing through pretreatment, reduces operation risk because circuit connection among all monomers is eliminated, adopts a heat conduction method of a closed box body to carry out non-air contact temperature return treatment on the frozen monomers, avoids scrapping of the monomers caused by a discharge loop formed by condensed water, and adopts a hot bath type glue removing method to facilitate stripping the glue which becomes soft and has low bonding strength from the monomers after hot bath.
Description
Technical Field
The invention belongs to the technical field of power battery recovery, and particularly relates to a technology for utilizing and disassembling a CTP battery pack monomer echelon.
Background
The power battery pack can be divided into two types according to the monomer composition mode: the first type is that a plurality of monomers form a module, and then a plurality of modules form a battery pack, which belongs to the traditional type of power battery packs; the second type is a battery Pack (Cell to Pack, no module power battery Pack, CTP for short) directly formed by a plurality of monomers, the intermediate link of a module is omitted, the energy density of the unit volume of the battery Pack is increased, and meanwhile, the manufacturing cost is also reduced, so that the battery Pack is a novel battery Pack which is advocated at present and is rising in batches.
In order to firmly mount a single body on a bottom shell of a battery pack and prevent the single body from being damaged when external forces such as bumping are applied, a layer of thick two-component adhesive is paved on the bottom shell of the conventional CTP battery pack. However, after several years of use, the battery pack is scrapped (i.e., the battery pack is out of service) within a specified time because the technical performance of the battery pack cannot meet the requirements of the power battery for the vehicle. The monomer in the retired battery pack can not meet the requirement on the performance of the monomer used on the electric automobile, but can be used in products such as street lamps and charger banks to realize gradient utilization. The CTP for carrying out echelon utilization is 3 ten thousand yuan higher than the selling price of non-echelon utilization (namely, renewable resource utilization) per ton, the value of the CTP for the enterprises is 1200 ten thousand yuan each year, and the benefit is increased month by month at present.
In order to realize the purpose of gradient utilization, the decommissioned CTP needs to be finely disassembled, and the appearance damage and the electrical property loss of a monomer in the disassembling process are reduced. The method for taking out the monomer can be various, such as freezing, heating, mechanical assistance, manual disassembly, solution soaking and the like, but the monomer cannot be guaranteed to be in good appearance and dimension and meet the requirements on the surface, and meanwhile, the battery cannot be guaranteed to have no harm to the electrical and technical performance. Due to the CTP battery pack after retirement, huge stepped utilization value exists. With coming of the retirement peak of the new energy electric automobile in the future, the potential value becomes more and more obvious. Therefore, it is necessary to research a disassembly process without damage to the monomer of the decommissioned CTP power battery pack.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art described above. Therefore, the invention provides a CTP battery pack monomer echelon utilization and disassembly process, achieves the purpose of echelon utilization, and can bring remarkable economic benefits to disassembly enterprises.
According to one aspect of the invention, a CTP battery pack monomer echelon utilization and disassembly process is provided, which comprises the following steps:
s1: pretreating the CTP battery pack to remove mechanical connection among monomers;
s2: freezing the pretreated CTP battery pack, and applying impact load to the frozen battery pack to separate the single body from the battery pack;
s3: wiping off surface moisture of the split monomer, and placing the monomer in a closed space with good heat conduction for temperature return;
s4: and immersing the adhesive surface of the monomer after the temperature is returned into hot water for a period of time, and then stripping the adhesive from the monomer.
In some embodiments of the invention, in step S1, the preprocessing includes: (1) removing an upper cover of the CTP battery pack; (2) disconnecting the high-voltage power supply, removing the high-voltage switch box, removing the BMS system, and removing a signal wire on the battery pack; (3) and milling the bus bars connecting the CTP battery packs with the monomers.
In some embodiments of the present invention, in step S1, the milling is performed by using a planer type milling machine.
In some embodiments of the present invention, the freezing is performed in a freezer using R507A refrigerant in step S2.
In some embodiments of the present invention, the battery pack is frozen in step S2 until the temperature of the battery pack reaches-30 to-35 ℃.
In some embodiments of the present invention, in step S2, the freezing time is 9 to 12 hours. The freezing time is determined according to the quality of the frozen object, the heat capacity of the frozen object, the temperature of the environment in the day, the existing heat preservation performance of the freezer and other factors.
In some embodiments of the present invention, in step S3, the time of the temperature returning is 6 to 8 hours.
In some embodiments of the present invention, in the step S4, the temperature of the hot water is 60-65 ℃.
In some embodiments of the present invention, in step S4, the immersion time in hot water is 5 to 8 minutes.
According to a preferred embodiment of the present invention, at least the following advantages are provided:
1. in order to rapidly disassemble the frozen battery pack at normal temperature, the CTP battery pack is pretreated in advance before being frozen so as to reduce the freezing and disassembling time, otherwise, if the time is too long, the temperature of the battery pack can rise back under the action of the ambient temperature, when the temperature rises back to a certain degree, the brittleness and toughness of the two-component adhesive are reduced, the disassembling difficulty is increased, and the damage-free disassembly cannot be effectively realized. In addition, exposure of the frozen cells to air for extended periods of time can produce large amounts of condensed water and can also cause irreversible performance damage to the cells. Therefore, the mechanical connection between the monomers is removed by pretreatment, the time and the difficulty are reduced for the disassembly after freezing, and simultaneously, the voltage is reduced and the operation risk is also reduced for the disassembly during freezing due to the elimination of the circuit connection between the monomers.
2. The invention adopts a method of hammering the shell of the battery pack to impact the monomer from the bottom shell. The CTP battery pack is pretreated in advance, so that a solid adhesive formed by two-component glue becomes the only connection between each monomer and the battery pack bottom shell, the toughness of the adhesive is reduced and the brittleness of the adhesive is obviously increased due to long-time low-temperature action in the colloid connection, and at the moment, the monomer can be easily separated from the battery pack bottom shell by using impact type load on the frozen battery pack.
3. The invention adopts the heat conduction method of the closed box body to carry out non-air contact temperature return treatment on the frozen monomer, thereby avoiding the rejection of the monomer caused by a discharge loop formed by condensed water. Due to the low temperature of the monomer, if the monomer is stored in the air, the monomer can quickly form a water film on the surface, particularly in the southern wet condition in summer, and in severe conditions, the monomer is just like water splashed on the monomer. The water film directly connects the anode and the cathode of the monomer to form a discharge loop, and the water film can discharge the monomer due to the electric quantity stored in the battery, so that the electric quantity stored in the monomer is reduced (the electric quantity of the monomer needs to keep a certain value, otherwise, over-discharge can be caused due to the excessively low electric quantity, and the monomer loses the value of gradient utilization), and the monomer loses the value of gradient utilization, so the phenomenon can cause harm to the gradient utilization and even become battery waste. The monomer is arranged in the cooling dispersion box or the cooling dispersion chamber, the temperature of the monomer can be gradually recovered under the action of heat conduction, and on the other hand, because the closed cooling dispersion box is isolated from air, the monomer cannot produce condensed water, so that the monomer cannot be damaged. When the temperature difference between the monomer and the environment temperature does not exist, the monomer is taken out from the box body, and the condensed water is not generated naturally.
4. The invention adopts a hot bath type degumming method to tear the colloid which becomes soft after hot bath and has low bonding strength from the monomer. Since the gel and monomer are already firmly standing together, it is not possible for the person to properly peel them off the monomer. If a milling machine is adopted to mill the colloid or a grinding machine is adopted to grind the colloid, practice proves that the two methods are not only slow, but also the colloid is removed, and the surface of the monomer is often scratched or even milled, so that the colloid is scrapped and cannot be utilized in a gradient manner. Therefore, the adhesive surface of the monomer is immersed in hot water, the adhesive strength between the colloid and the monomer is obviously reduced due to the heating action, the colloid per se is softened due to heating, at the moment, the colloid can be easily shoveled and torn from the monomer by manual operation and tools such as a scraper, and the surface of the monomer is intact.
Drawings
The invention is further described with reference to the following figures and examples, in which:
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
Example 1
A CTP battery pack monomer echelon utilization and disassembly process is disclosed, referring to FIG. 1, and the specific process comprises the following steps:
(1) and (3) constructing an ultra-low temperature freezer, wherein the freezing temperature of the freezer can be as low as-45 ℃ at least, and the selected refrigerant is R507A.
(2) Pretreatment: and (3) detaching the upper cover of the battery pack, disconnecting the high-voltage power supply, detaching the high-voltage switch box, detaching the BMS system, detaching the signal line on the battery pack, placing the CTP battery pack on a gantry milling machine, and milling the bus bar connecting the battery pack with each monomer.
(3) Low-temperature freezing and disassembling: sending the pretreated CTP battery pack to a freezer for low-temperature freezing, wherein the freezing time is determined according to the mass of a frozen object, the heat capacity of the frozen object, the ambient temperature of the day, the existing heat preservation performance of the freezer and other factors, generally speaking, the freezing time is between 9 and 12 hours, and when the overall temperature (namely the inside and the outside of the battery pack) of the battery pack reaches-30 to-35 ℃, the battery pack can be taken out for freezing and dismantling; the frozen battery pack is hammered, and the single battery pack can be easily separated from the bottom shell of the battery pack.
(4) And (3) sealing and temperature return: the monomer is conveyed into a special 'cooling dispersing box' made of metal materials which are closed and good in heat conduction, moisture on the surface of the monomer is wiped off by a dry towel, then a cover of the cooling dispersing box is covered, the monomer is completely isolated from air, and the temperature of the monomer is kept equal to the ambient temperature after 6-8 hours of temperature return.
The cooling boxes are made of aluminum plates with good heat dissipation, each cooling box is small in size, and the length, width and height of each cooling box are generally 0.6 m multiplied by 0.5 m multiplied by 0.4 m. The purpose is three: (1) the monomer to be cooled can be fully filled in a short time; (2) the cooling speed is improved due to small volume and high heat conductivity coefficient of the aluminum product; (3) the box body is light in weight and convenient to move and operate.
Before the monomer is placed, the dry cotton cloth is used for wiping off moisture on the surface of the monomer and then the monomer is placed, and after the monomer is placed, the cover of the cooling box is covered, so that the placing time is short, the air quantity contained in the box body after the monomer is placed is limited, the moisture produced by the box body is small, the monomer in the box cannot be damaged, and other remedial measures are not needed.
(5) Hot bath degumming: and (3) immersing the adhesive surface of the monomer into warm water with the water temperature of 60-65 ℃, keeping for 5-8 minutes, and shoveling and tearing the colloid from the monomer by means of tools such as a scraper by manual operation, wherein the surface of the monomer is intact.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
Claims (9)
1. A CTP battery pack monomer echelon utilization and disassembly process is characterized by comprising the following steps:
s1: pretreating the CTP battery pack to remove mechanical connection among monomers;
s2: freezing the pretreated CTP battery pack, and applying impact load to the frozen battery pack to separate the monomer from the battery pack;
s3: wiping off surface moisture of the split monomer, and placing the monomer in a closed space with good heat conduction for temperature return;
s4: and immersing the adhesive surface of the monomer after the temperature is returned into hot water for a period of time, and then stripping the adhesive from the monomer.
2. The stepwise utilization disassembly process for CTP battery pack cells as claimed in claim 1, wherein in step S1, said pretreatment comprises: (1) removing an upper cover of the CTP battery pack; (2) disconnecting the high-voltage power supply, removing the high-voltage switch box, removing the BMS system, and removing the signal wire on the battery pack; (3) and milling the bus bars connecting the CTP battery packs with the monomers.
3. The stepwise utilization and disassembly process for single CTP battery packs according to claim 2, wherein in step S1, the milling is performed by using a planer type milling machine.
4. The stepwise disassembling process of CTP battery pack cells according to claim 1, wherein in step S2, said freezing is performed in a freezer using R507A refrigerant.
5. The stepwise utilization and disassembly process for the CTP battery pack monomers as claimed in claim 1, wherein in step S2, the temperature of the battery pack is frozen until the overall temperature of the battery pack reaches-30 ℃ to-35 ℃.
6. The stepwise utilization and disassembly process for the CTP battery pack cells of claim 1, wherein in step S2, the freezing time is 9-12 hours.
7. The stepwise utilization and disassembly process for the CTP battery pack cells as claimed in claim 1, wherein in step S3, the time for the temperature return is 6-8 hours.
8. The stepwise utilization and disassembly process for the CTP battery pack cells as claimed in claim 1, wherein the temperature of the hot water in step S4 is 60-65 ℃.
9. The stepwise disassembling process for CTP battery pack cells according to claim 1, wherein in step S4, the immersion time in hot water is 5-8 minutes.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111068588.0A CN113964408B (en) | 2021-09-13 | 2021-09-13 | CTP battery pack monomer echelon utilization and disassembly process |
| PCT/CN2022/090531 WO2023035635A1 (en) | 2021-09-13 | 2022-04-29 | Disassembly process for ctp battery pack utilizing cells step-by-step |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111068588.0A CN113964408B (en) | 2021-09-13 | 2021-09-13 | CTP battery pack monomer echelon utilization and disassembly process |
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| Publication Number | Publication Date |
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| CN113964408A true CN113964408A (en) | 2022-01-21 |
| CN113964408B CN113964408B (en) | 2024-07-09 |
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| WO (1) | WO2023035635A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023035635A1 (en) * | 2021-09-13 | 2023-03-16 | 广东邦普循环科技有限公司 | Disassembly process for ctp battery pack utilizing cells step-by-step |
| WO2023240734A1 (en) * | 2022-06-17 | 2023-12-21 | 广东邦普循环科技有限公司 | New energy vehicle, and ctp traction battery pack and echelon disassembling method therefor |
| WO2024051100A1 (en) * | 2022-09-05 | 2024-03-14 | 广东邦普循环科技有限公司 | Battery pack disassembling method and device |
| WO2024124731A1 (en) * | 2022-12-14 | 2024-06-20 | 广东邦普循环科技有限公司 | Method for disassembling battery module |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118263555A (en) * | 2024-04-15 | 2024-06-28 | 山东汉大环境科技有限公司 | Disassembling mechanism and disassembling method for battery pack |
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| CN113964408B (en) * | 2021-09-13 | 2024-07-09 | 广东邦普循环科技有限公司 | CTP battery pack monomer echelon utilization and disassembly process |
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2021
- 2021-09-13 CN CN202111068588.0A patent/CN113964408B/en active Active
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2022
- 2022-04-29 WO PCT/CN2022/090531 patent/WO2023035635A1/en unknown
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| CN103138019A (en) * | 2013-01-28 | 2013-06-05 | 佛山市邦普循环科技有限公司 | Waste energy echelon utilization method of power battery for electric vehicle |
| CN109103535A (en) * | 2018-08-09 | 2018-12-28 | 深圳市伟创源科技有限公司 | A kind of disassembling method of automobile elevator primary cell mould group |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023035635A1 (en) * | 2021-09-13 | 2023-03-16 | 广东邦普循环科技有限公司 | Disassembly process for ctp battery pack utilizing cells step-by-step |
| WO2023240734A1 (en) * | 2022-06-17 | 2023-12-21 | 广东邦普循环科技有限公司 | New energy vehicle, and ctp traction battery pack and echelon disassembling method therefor |
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| WO2024124731A1 (en) * | 2022-12-14 | 2024-06-20 | 广东邦普循环科技有限公司 | Method for disassembling battery module |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023035635A1 (en) | 2023-03-16 |
| CN113964408B (en) | 2024-07-09 |
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