CN111628228B - Preparation method of liquid lithium ion pole piece battery pack - Google Patents
Preparation method of liquid lithium ion pole piece battery pack Download PDFInfo
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- CN111628228B CN111628228B CN202010502227.1A CN202010502227A CN111628228B CN 111628228 B CN111628228 B CN 111628228B CN 202010502227 A CN202010502227 A CN 202010502227A CN 111628228 B CN111628228 B CN 111628228B
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- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application discloses a preparation method of a liquid lithium ion pole piece battery pack, which comprises the following steps: step 1, preparing a pole piece capacity unit; step 2, preparing a lithium ion pole piece battery pack to be injected with liquid for activation; step 3, injecting lithium ion electrolyte; step 4, activating; and 5, after activation, forming a filled type sealed packaging shell which is used for sealing and packaging the whole periphery of the outside of the battery pack and filling all the residual space in the battery pack through filled type sealed packaging, so as to isolate the battery pack from the external environment and fix the components of the battery pack, and thus obtaining the liquid lithium ion pole piece battery pack. Compared with the complicated traditional process route, the method simplifies the traditional battery pack manufacturing process into stacking, welding, liquid injection, activation and encapsulation, shortens the process route, improves the productivity, enables the preparation of the battery pack to be more easily controlled, simultaneously realizes the serial formation of the whole battery pack in the same environment, improves the consistency among single battery cells, and improves the battery pack performance.
Description
Technical Field
The application relates to the technical field of lithium batteries, in particular to a preparation method of a liquid lithium ion pole piece battery pack.
Background
Along with popularization and application of new energy automobiles and 5G technology, the intelligent society has moved into daily life of people, and the quantity demand of off-grid energy storage power sources is larger and the quality demand is higher and higher. The safety, service life and full life cost of the battery as an energy storage device are of great concern. The problems of leakage, ignition, attenuation, low energy density, high cost and the like of the liquid lithium ion battery are all important bottlenecks for application.
The final application of battery products, especially power supplies, energy storage power supplies, is battery packs. The preparation of the traditional battery PACK comprises the steps of firstly manufacturing single battery CELLs, injecting liquid, sealing, forming, packaging, aging, separating and selecting the single battery CELLs, then assembling the single battery CELLs into a module in series-parallel connection, and then assembling the module into a finished battery PACK (English CELL to MODULE to PACK, abbreviated as CTMTP; CELL to PACK, abbreviated as CTP). The manufacturing process is complex in steps, so that the consistency of finished batteries is poor, and a large number of connecting pieces are needed in the processes of forming modules and forming bags, so that the traditional battery bags have the defects of more components, high material consumption and energy consumption, low energy density and power density, poor consistency of single battery cells, short cycle life, complex and tedious preparation process, low production efficiency, high manufacturing cost and the like, and therefore, the technical threshold of production and preparation is high, and the industrial popularization is not facilitated.
Disclosure of Invention
Aiming at the defects of the prior art, the application aims to provide a preparation method of a liquid lithium ion pole piece battery pack.
The technical scheme for solving the technical problems is that the application provides a preparation method of a liquid lithium ion pole piece battery pack, which is characterized by comprising the following steps:
step 1, preparing a pole piece capacity unit;
step 2, preparing a lithium ion pole piece battery pack to be injected with liquid for activation: connecting the capacity unit cathode lug of one pole piece capacity unit with the capacity unit anode lug of the last or the next pole piece capacity unit, and further connecting all pole piece capacity units end to end in sequence to form a positive-negative connected serial structure; the positive electrode lug of the capacity unit of the first pole piece leads out the total positive electrode binding post of the battery pack; the capacity unit negative lug of the last pole piece capacity unit leads out the battery pack total negative connecting terminal; a multifunctional voltage acquisition wire harness is connected to a capacity unit positive electrode lug or a capacity unit negative electrode lug between two adjacent pole piece capacity units; the positive electrode lug of the capacity unit of the first pole piece capacity unit is connected with a multifunctional voltage acquisition wire harness, and the negative electrode lug of the capacity unit of the last pole piece capacity unit is connected with a multifunctional voltage acquisition wire harness; an insulating impermeable film is arranged between two adjacent pole piece capacity units, and each pole piece capacity unit is further separated to form an independent unit, so that a lithium ion pole piece battery pack to be activated by liquid injection is obtained;
step 3, liquid injection: connecting a battery pack total positive electrode wiring terminal with a positive electrode bus, and connecting a battery pack total negative electrode wiring terminal with a negative electrode bus; the multifunctional voltage acquisition wire harness, the positive electrode bus and the negative electrode bus are led out of a closed loop with controllable temperature and air pressure conditions; then sealing and introducing protective gas to form a sealed protective gas environment with controllable temperature and air pressure conditions, and injecting liquid into the sealed protective gas environment;
step 4, activating: the method comprises the steps of evacuating redundant electrolyte, connecting an external connector lug of a multifunctional voltage acquisition wire harness, an anode bus and a cathode bus with activating equipment, and activating in a closed protective gas environment with controllable temperature and air pressure conditions;
and 5, after activation, forming a filled type sealed packaging shell which is used for sealing and packaging the whole periphery of the outside of the battery pack and filling all the residual space in the battery pack through filled type sealed packaging, so as to isolate the battery pack from the external environment and fix the components of the battery pack, and thus obtaining the liquid lithium ion pole piece battery pack.
Compared with the prior art, the application has the beneficial effects that:
(1) Compared with the complicated traditional process route, the method simplifies the traditional battery pack manufacturing process into stacking, welding, liquid injection, activation and encapsulation, shortens the process route, improves the productivity, enables the preparation of the battery pack to be more easily controlled, simultaneously realizes the serial formation of the whole battery pack in the same environment, improves the consistency among single battery cells, and improves the battery pack performance.
(2) The traditional process is improved, the cell removal and the modularization of the liquid lithium ion pole piece battery pack are realized, and the energy density and the power density are improved.
(3) The application directly assembles the positive and negative electrode plates of the battery into the liquid lithium ion electrode plate battery pack (LITHIUM IONBATTERY POLE PIECE to PACK, abbreviated as LIB PTP), solves the problems of long process route, complex working procedure, low production efficiency, more consumption materials, large consumption of auxiliary raw materials and battery pack accessories, low energy density, high cost, long cycle life, large kilowatt-hour investment density, poor safety and the like in the traditional preparation process of the liquid lithium ion electrode plate battery pack, and has the remarkable advantages of short process route, less consumption materials, high efficiency, high yield, low manufacturing cost and the like.
Drawings
FIG. 1 is a schematic view of the inside of an overall structure of an embodiment of the present application;
fig. 2 is a schematic structural diagram of a stacking unit according to an embodiment of the application.
In the figure: 1. the battery pack is provided with a total positive electrode connecting terminal; 2. a battery pack total negative electrode connection terminal; 3. a filled hermetic package housing; 4. a pole piece capacity unit; 5. multifunctional voltage acquisition wiring harness; 6. positive electrode lugs of the capacity units; 7. a capacity unit negative electrode lug; 8. an insulating impermeable film; 41. a positive tab of the pole piece; 42. a positive plate; 43. a separation film; 44. a negative electrode sheet; 45. and a pole piece negative electrode lug.
Detailed Description
Specific examples of the present application are given below. The specific examples are provided only for further details of the present application and do not limit the scope of the claims.
The application provides a preparation method (short for method) of a liquid lithium ion pole piece battery pack, which is characterized by comprising the following steps:
step 1, preparing a pole piece capacity unit 4: after the positive plates 42, the negative plates 44 and the isolating films 43 are cut, the end parts of the positive plates 42 are pole piece positive lugs 41, the end parts of the negative plates 44 are pole piece negative lugs 45, and the isolating films 43 are adhered between the positive plates 42 and the negative plates 44, so that a stacking unit is obtained by stacking in this way; a plurality of stacking units are connected in parallel to form a pole piece capacity unit 4; according to the method, a plurality of pole piece capacity units 4 are obtained, and the capacity of each pole piece capacity unit 4 is the same;
the positive pole lugs 41 of all the stacking units of each pole piece capacity unit 4 are connected into a positive pole lug 6 of the capacity unit through an ultrasonic welding process, and the negative pole lugs 45 of all the pole pieces of each pole piece capacity unit 4 are connected into a negative pole lug 7 of the capacity unit through an ultrasonic welding process;
preferably, the positive tab 41 can be made of aluminum foil, microporous aluminum foil or aluminum net film; the positive electrode sheet 42 may be lithium cobaltate, lithium manganate, ternary lithium or lithium iron phosphate positive electrode sheet; the isolating membrane 43 can be a lithium ion permeable electron insulating microporous membrane such as PP, PE or PET; the negative electrode sheet 44 can be made of artificial graphite, natural graphite, mesocarbon microbeads, silicon-carbon composite material or lithium titanate negative electrode sheet; the tab negative electrode tab 45 may be copper foil, microporous copper foil or copper mesh film.
Step 2, preparing a lithium ion pole piece battery pack to be injected with liquid for activation: the capacity unit cathode lug 7 of one pole piece capacity unit 4 is connected with the capacity unit anode lug 6 of the last or the next pole piece capacity unit 4 through an ultrasonic welding process, so that all pole piece capacity units 4 are sequentially connected end to end one by one to form a positive-negative connected serial structure, and the output voltage level of a battery pack is improved; the positive electrode lug 6 of the capacity unit of the first pole piece capacity unit 4 is led out of the battery pack total positive electrode wiring terminal 1; the capacity unit negative electrode lug 7 of the last pole piece capacity unit 4 leads out the battery pack total negative electrode wiring terminal 2; a capacity unit positive electrode lug 6 or a capacity unit negative electrode lug 7 between two adjacent pole piece capacity units 4 is connected with a multifunctional voltage acquisition wire harness 5 through an ultrasonic welding process; the capacity unit positive electrode lug 6 of the first pole piece capacity unit 4 is connected with a multifunctional voltage acquisition wire harness 5 through an ultrasonic welding process, and the capacity unit negative electrode lug 7 of the last pole piece capacity unit 4 is connected with the multifunctional voltage acquisition wire harness 5 through an ultrasonic welding process; an insulating impermeable film 8 is arranged between two adjacent pole piece capacity units 4, so that each pole piece capacity unit 4 is separated independently to form an independent unit, and the electrolyte of each pole piece capacity unit 4 is ensured not to be communicated, so that a lithium ion pole piece battery pack to be activated by the electrolyte injection is obtained;
preferably, the insulating impermeable film 8 is PE, PET, PP, epoxy resin or mica sheet, and has a thickness of 0.1 mm-3 mm.
Step 3, liquid injection: clamping the lithium ion pole piece battery pack to be injected with the liquid obtained in the step 2 in a controllable airtight environment with controllable temperature, air pressure and other conditions so that the position of the lithium ion pole piece battery pack to be injected with the liquid is fixed; the battery pack total positive electrode binding post 1 is connected with a positive electrode bus through a welding fixing piece, and the battery pack total negative electrode binding post 2 is connected with a negative electrode bus through a welding fixing piece; the multifunctional voltage acquisition wire harness 5, the anode bus and the cathode bus are led out of the sealed environment with controllable conditions such as temperature, air pressure and the like for the external connector lug; then sealing and introducing protective gas such as nitrogen to form a sealed protective gas environment with controllable temperature, air pressure and other conditions, drying and injecting lithium ion electrolyte (firstly drying and then injecting the liquid, in the embodiment, soaking the dried lithium ion pole piece battery pack to be injected with the liquid into the lithium ion electrolyte for full infiltration);
step 4, activating: after the liquid injection is completed, the redundant electrolyte is emptied, the battery pack is clamped, the external connector lug of the multifunctional voltage acquisition wire harness 5, the positive electrode bus and the negative electrode bus is connected with the activating equipment, and high-voltage constant-current and constant-voltage sectional charge-discharge activation is carried out in a sealed protective gas environment (heating and pressurizing conditions in the embodiment) with controllable conditions such as temperature, air pressure and the like;
the activation conditions are: activating direct current voltage of 5V-1000V (preferably 5V-750V), temperature of 30-65 ℃ (preferably 45-60 ℃), air pressure of 150 kpa-250 kpa; the activation device can adopt an automatic adjustable constant-current constant-voltage direct-current power supply.
And 5, after activation, forming a filling type airtight packaging shell 3 for sealing all the periphery of the outside of the battery pack and filling all the residual space in the battery pack through filling type airtight packaging, so as to isolate the battery pack from the external environment and fix the components of the battery pack, and thus obtaining the liquid lithium ion pole piece battery pack.
Preferably, before the liquid is injected in the step 3, the to-be-injected liquid activated lithium ion pole piece battery pack obtained in the step 2 can be subjected to semi-filled airtight packaging, so that the risk of electrolyte intercommunication can be reduced by design; the semi-filled hermetic package is: of the four faces perpendicular to the insulating barrier film 8, at least one of the two faces without the capacity cell positive electrode tab 6 and the capacity cell negative electrode tab 7 is not subjected to the filled hermetic package for immersion of the electrolyte (i.e., at least one of the front and rear faces in fig. 1 is not subjected to the filled hermetic package); meanwhile, the battery pack total positive electrode binding post 1, the battery pack total negative electrode binding post 2 and the multifunctional voltage acquisition wire harness 5 are positioned through the airtight packaging surface, and an external binding post is reserved at the outer side of the airtight packaging surface.
When the semi-filled type sealed packaging is adopted, in the step 5, only the surface which is not subjected to the filled type sealed packaging is subjected to the filled type sealed packaging, and then the surface is combined with the semi-filled type sealed packaging to form a filled type sealed packaging shell 3; when the semi-filled type sealed packaging is not adopted, in the step 5, all the periphery of the outer part of the battery pack is sealed and filled with all the residual space in the battery pack through the filled type sealed packaging, so that the filled type sealed packaging shell 3 is formed, and meanwhile, the battery pack total positive electrode wiring terminal 1, the battery pack total negative electrode wiring terminal 2 and the multifunctional voltage acquisition wiring harness 5 are positioned through the filled type sealed packaging shell 3, and an external wiring lug is reserved at the outer side of the filled type sealed packaging shell 3.
The external connector lugs of the battery pack total positive electrode connecting terminal 1 and the battery pack total negative electrode connecting terminal 2 are respectively connected with the positive electrode bus and the negative electrode bus through welding fixing pieces.
Filling and sealing the outer periphery and the inner gap of the battery pack in a filling and sealing material filling and sealing mode in an injection solidification, foaming solidification or liquid injection solidification mode; the filling sealing material adopts PP, PE, PU, ABS or epoxy resin and other insulating heat-resistant, weather-resistant, solvent-resistant and flame-retardant polymer materials.
Preferably, the obtained liquid lithium ion pole piece battery pack is connected with an electric appliance and a battery management system to be manufactured into a charge-discharge energy storage power supply.
The application is applicable to the prior art where it is not described.
Claims (10)
1. The preparation method of the liquid lithium ion pole piece battery pack is characterized by comprising the following steps of:
step 1, preparing a pole piece capacity unit: after the positive plates, the negative plates and the isolating films are cut, the end parts of the positive plates are positive plate lugs, the end parts of the negative plates are negative plate lugs, and isolating films are arranged between the positive plates and the negative plates, so that a stacking unit is obtained by stacking in the mode; a plurality of stacking units are connected in parallel to form a pole piece capacity unit; obtaining a plurality of pole piece capacity units according to the method;
step 2, preparing a lithium ion pole piece battery pack to be injected with liquid for activation: connecting the capacity unit cathode lug of one pole piece capacity unit with the capacity unit anode lug of the last or the next pole piece capacity unit, and further connecting all pole piece capacity units end to end in sequence to form a positive-negative connected serial structure; the positive electrode lug of the capacity unit of the first pole piece leads out the total positive electrode binding post of the battery pack; the capacity unit negative lug of the last pole piece capacity unit leads out the battery pack total negative connecting terminal; a multifunctional voltage acquisition wire harness is connected to a capacity unit positive electrode lug or a capacity unit negative electrode lug between two adjacent pole piece capacity units; the positive electrode lug of the capacity unit of the first pole piece capacity unit is connected with a multifunctional voltage acquisition wire harness, and the negative electrode lug of the capacity unit of the last pole piece capacity unit is connected with a multifunctional voltage acquisition wire harness; an insulating impermeable film is arranged between two adjacent pole piece capacity units, and each pole piece capacity unit is further separated to form an independent unit, so that a lithium ion pole piece battery pack to be activated by liquid injection is obtained;
step 3, liquid injection: connecting a battery pack total positive electrode wiring terminal with a positive electrode bus, and connecting a battery pack total negative electrode wiring terminal with a negative electrode bus; the multifunctional voltage acquisition wire harness, the positive electrode bus and the negative electrode bus are led out of a closed loop with controllable temperature and air pressure conditions; then sealing and introducing protective gas to form a sealed protective gas environment with controllable temperature and air pressure conditions, and injecting liquid into the sealed protective gas environment;
step 4, activating: the method comprises the steps of evacuating redundant electrolyte, connecting an external connector lug of a multifunctional voltage acquisition wire harness, an anode bus and a cathode bus with activating equipment, and activating in a closed protective gas environment with controllable temperature and air pressure conditions;
step 5, after activation, forming a filled type airtight packaging shell which is used for sealing the whole periphery of the outside of the battery pack and filling all the residual space in the battery pack through filled type airtight packaging, so as to isolate the battery pack from the external environment and fix the components of the battery pack, and obtaining the liquid lithium ion pole piece battery pack;
the filling type airtight packaging is to fill and airtight package the outer periphery and the inner gap of the battery pack in a mode of injection solidification, foaming solidification or liquid injection solidification through filling sealing materials.
2. The method of manufacturing a liquid lithium ion battery pack according to claim 1, wherein positive tabs of all stacked units of each of the positive tab capacity units are connected to form a positive tab of a capacity unit, and negative tabs of all the negative tabs of each of the positive tab capacity units are connected to form a negative tab of a capacity unit.
3. The method for preparing the liquid lithium ion pole piece battery pack according to claim 2, wherein the pole piece positive electrode lug adopts aluminum foil, microporous aluminum foil or aluminum net film; the positive plate adopts lithium cobalt oxide, lithium manganate, ternary lithium or lithium iron phosphate positive plate; the isolating membrane adopts a PP, PE or PET lithium ion permeable electronic insulating microporous membrane; the negative electrode plate is made of artificial graphite, natural graphite, mesophase carbon microspheres, silicon-carbon composite materials or lithium titanate negative electrode plates; the negative electrode lug of the pole piece can adopt copper foil, microporous copper foil or copper net film.
4. The method for preparing the liquid lithium ion pole piece battery pack according to claim 1, wherein in the step 2, the insulating impermeable film is PE, PET, PP, epoxy resin or mica sheet, and the thickness is 0.1-3 mm.
5. The method for preparing the liquid lithium ion pole piece battery pack according to claim 1, wherein in the step 3, before the electrolyte is injected, the lithium ion pole piece battery pack to be activated by the electrolyte obtained in the step 2 is clamped in a sealable environment with controllable temperature and air pressure conditions, so that the position of the lithium ion pole piece battery pack to be activated by the electrolyte is fixed; connecting a battery pack total positive electrode wiring terminal with a positive electrode bus, and connecting a battery pack total negative electrode wiring terminal with a negative electrode bus; the multifunctional voltage acquisition wire harness, the positive electrode bus and the negative electrode bus are led out of a closed loop with controllable temperature and air pressure conditions; and then sealing and introducing protective gas to form a sealed protective gas environment with controllable temperature and pressure conditions, and drying the sealed protective gas environment.
6. The method for preparing a liquid lithium ion pole piece battery pack according to claim 1, wherein in step 4, after the surplus electrolyte is emptied, the battery pack is clamped, and the external connector connection activating device of the external connectors of the multifunctional voltage acquisition wire harness, the positive electrode bus and the negative electrode bus is subjected to high-voltage constant-current constant-voltage sectional charge and discharge activation in a heated and pressurized airtight protective gas environment.
7. The method for preparing a liquid lithium ion pole piece battery pack according to claim 1 or 6, wherein the activating conditions are: activating direct current voltage of 5V-1000V, temperature of 30-65 ℃ and air pressure of 150 kpa-250 kpa; the activation equipment adopts an automatic adjustable constant-current constant-voltage direct-current power supply.
8. The method for preparing the liquid lithium ion pole piece battery pack according to claim 1, which is characterized in that before the step 3, the liquid to be injected activated lithium ion pole piece battery pack obtained in the step 2 is subjected to semi-filled airtight packaging; the semi-filled hermetic package is: at least one of the two surfaces of the positive electrode lug of the capacity unit and the negative electrode lug of the capacity unit, which are perpendicular to the insulating impermeable film, is not subjected to filling type airtight packaging and is used for immersing electrolyte; meanwhile, the battery pack total positive electrode binding post, the battery pack total negative electrode binding post and the multifunctional voltage acquisition wire harness are positioned through the airtight packaging surface, and an external binding post is reserved at the outer side of the airtight packaging surface.
9. The method for preparing a liquid lithium ion pole piece battery pack according to claim 8, wherein when the semi-filled sealed packaging is adopted, only the surface which is not subjected to the filled sealed packaging is required to be subjected to the filled sealed packaging in the step 5, and then the surface is combined with the semi-filled sealed packaging to form a filled sealed packaging shell; when the semi-filled type sealed packaging is not adopted, in the step 5, all the periphery of the outer part of the battery pack is sealed and filled with all the residual space in the battery pack through the filled type sealed packaging, so that a filled type sealed packaging shell is formed, and meanwhile, the battery pack total positive electrode wiring terminal, the battery pack total negative electrode wiring terminal and the multifunctional voltage acquisition wiring harness are positioned through the filled type sealed packaging shell, and an external wiring lug is reserved at the outer side of the filled type sealed packaging shell.
10. The method for preparing a liquid lithium ion pole piece battery pack according to claim 1, 8 or 9, wherein the filling and sealing material is PP, PE, PU, ABS or epoxy resin.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010502227.1A CN111628228B (en) | 2020-06-04 | 2020-06-04 | Preparation method of liquid lithium ion pole piece battery pack |
| PCT/CN2021/098050 WO2021244595A1 (en) | 2020-06-04 | 2021-06-03 | Liquid lithium-ion electrode sheet battery pack, preparation method therefor, and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010502227.1A CN111628228B (en) | 2020-06-04 | 2020-06-04 | Preparation method of liquid lithium ion pole piece battery pack |
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| CN111628228B true CN111628228B (en) | 2023-10-03 |
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| WO2021244595A1 (en) * | 2020-06-04 | 2021-12-09 | 极安新能源科技（上海）有限公司 | Liquid lithium-ion electrode sheet battery pack, preparation method therefor, and application thereof |
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