CN110890593A - Preparation method of lithium ion low-voltage power supply for commercial vehicle - Google Patents
Preparation method of lithium ion low-voltage power supply for commercial vehicle Download PDFInfo
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- CN110890593A CN110890593A CN201911178722.5A CN201911178722A CN110890593A CN 110890593 A CN110890593 A CN 110890593A CN 201911178722 A CN201911178722 A CN 201911178722A CN 110890593 A CN110890593 A CN 110890593A
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 115
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 115
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 239000000178 monomer Substances 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000004382 potting Methods 0.000 claims abstract description 13
- 239000000565 sealant Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 239000000853 adhesive Substances 0.000 claims abstract description 7
- 230000001070 adhesive effect Effects 0.000 claims abstract description 7
- 238000010248 power generation Methods 0.000 claims description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 229910052744 lithium Inorganic materials 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 4
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910021389 graphene Inorganic materials 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 9
- 229910052751 metal Inorganic materials 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 8
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229940085991 phosphate ion Drugs 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
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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
-
- 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
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6571—Resistive heaters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
-
- 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 & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Materials Engineering (AREA)
- Automation & Control Theory (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a preparation method of a lithium ion low-voltage power supply for a commercial vehicle. The process is as follows: attaching a heating film to the surfaces of the lithium ion battery monomers, connecting a plurality of lithium ion battery monomers in parallel to form a lithium ion battery module, and connecting a plurality of lithium ion battery modules in series to form a lithium ion battery module fixed in the box body; pouring the electronic pouring sealant into the box body until the electronic pouring sealant completely covers the lithium ion battery module; the controller, the temperature sensor and the switch are fixed on the inner surface of the cover plate, then the controller is connected with the lithium ion battery module in parallel and then connected with the positive pole column and the negative pole column on the cover plate, the heating film is connected with the switch in series and then connected with the heating module outside the box body, and finally the cover plate is connected with the box body in a sealing mode. The lithium ion battery module is fixed in the box body through the potting adhesive, so that the lithium ion battery module has a vibration-proof function, can prevent the battery module and a metal connector between the battery modules from cracking or falling off, has a vibration-proof function, and can meet the use requirements of the whole vehicle under all working conditions.
Description
Technical Field
The invention belongs to the technical field of low-voltage power supply of automobiles, and particularly relates to a preparation method of a lithium ion low-voltage power supply for a commercial automobile, which is particularly suitable for meeting the starting and parking power supply capacities of the whole automobile under different working conditions, different environmental requirements and parking conditions of the commercial automobile.
Background
With the development of new energy automobiles, the application of lithium ion batteries to automobiles becomes the mainstream. The lithium ion low voltage power supply mainly comprises 12V, 24V, 36V, 48V and the like. The common characteristics of the low-voltage power supply are light weight, long endurance, long service life, energy conservation and environmental protection, wherein the 12V lithium ion low-voltage power supply is already in an application stage on a car, the 24V, 36V and 48V lithium ion low-voltage power supplies are already applied to the field of electric bicycles and are mature, but the 24V lithium ion low-voltage power supply is only in a development and small-batch verification stage in the field of low-voltage power supplies of commercial vehicles, and the wide application is not started yet. The 24V lead-acid storage battery which is the mainstream in the market has some problems when being used as a 24V low-voltage power supply of a commercial vehicle. When the commercial vehicle low-voltage power supply is used, along with the vibration of different working conditions of the whole vehicle, the small units in the power supply and the whole power supply are cracked or fall off, so that the small units in the power supply are stressed unevenly, and the small units in the power supply are short-circuited by serious people; the physical distribution commercial truck has large span in a geographical area with changed use environment, and the ignition of the whole truck fails in a very low temperature environment in the market, so that the normal operation of the truck is influenced; when the whole vehicle is in forced stop operation and has a rest, a user adopts a parking air conditioner to obtain cold air for energy conservation and cost reduction, but the power supply time of a 24V lead-acid storage battery of the whole vehicle is only 30 minutes per month, so that the user cannot meet the user requirement, and a self-mounted diesel generator in the market supplies power for the cold air conditioner when the whole vehicle is parked, but the self-mounted diesel generator has potential safety hazards and is additionally provided with an air conditioning copper pipe, so that the service life is short; meanwhile, the current vehicle battery is generally fixed in a bolt mode, the shock resistance is poor, and in the running process of the vehicle, the battery modules connected in series and parallel are easy to crack, and the safety performance is poor.
Disclosure of Invention
The invention aims to solve the defects of the background technology, provides a preparation method of a lithium ion low-voltage power supply for a commercial vehicle, and solves the problems that the whole vehicle cannot be started normally at a lower environmental temperature and the inside of the power supply is cracked or falls off due to the vibration of the whole vehicle.
The technical scheme adopted by the invention is as follows: a preparation method of a lithium ion low-voltage power supply for a commercial vehicle comprises the following steps:
and 3, fixing the controller, the temperature sensor and the switch on the inner surface of the cover plate, then connecting the controller and the lithium ion battery module in parallel, respectively connecting the anode and the cathode of the lithium ion battery module with the anode post and the cathode post on the cover plate, connecting the heating film and the switch in series and then connecting the heating film and the switch to the heating module outside the box body, and finally connecting the cover plate and the box body in a sealing manner to form the low-voltage power supply.
Furthermore, the thickness of the electronic pouring sealant covered on the surface of the lithium ion battery module is 5 mm-50 mm.
Furthermore, the vacuum degree of the vacuum pumping is-0.08 MPa to-0.05 MPa.
Further, the vacuumizing time is 5-10 min.
Further, the temperature of the high-temperature environment is 60-80 ℃,
further, the time for placing the lithium ion battery module in a high-temperature environment is 6-10 h.
Further, the lithium ion battery monomer is a lithium titanate battery monomer, or a lithium iron phosphate battery monomer, or a lithium manganate battery monomer.
Further, the heating film is a graphene sheet.
Further, the power generation module is a solar panel.
Further, the temperature detection module is a temperature sensor.
The invention has the beneficial effects that:
1. the invention ensures that the lithium ion low-voltage power supply has low internal resistance and can discharge at extremely low temperature, and ensures that the commercial vehicle starts in the environment of extremely low temperature of minus 35 ℃; the conventional discharge depth capacity of the battery is 90-95%, and the power supply time of the commercial vehicle for parking the cold air conditioner at the temperature of 35 ℃ is ensured to be more than 3 h; according to the glue filling process in the preparation method, all parts of the lithium ion low-voltage power supply form a whole body and have certain buffering protection on vibration, the connection of all parts in the power supply is not affected when the commercial vehicle runs under all working conditions, and the use under all working conditions of the whole vehicle can be met.
2. The lithium ion low-voltage power supply adopts the glue pouring process of electronic pouring glue, the lithium ion battery modules are poured and sealed and fixed in the box body, so that the lithium ion low-voltage power supply has the vibration-proof function, the solidified glue has certain elasticity and is not easy to age, the heat dissipation of the battery is not influenced, the cracking or falling of the battery modules and the metal connecting bodies between the modules are prevented, the vibration-damping effect is realized, and the use under the full working condition of the whole vehicle can be met.
3. According to the invention, the heating film is arranged on the lithium ion battery module, and the heating film can be controlled by the controller and the power generation module to generate heat to heat the battery module at a lower temperature, so that the problem that the battery cannot be started due to insufficient power supply in the extremely low temperature environment of the power supply of the commercial vehicle at present is solved, meanwhile, the influence of battery charging on the service life of the battery at a lower environmental temperature can be avoided, and the service life of the power supply is prolonged.
Drawings
FIG. 1 is a flow chart of the preparation process of the lithium ion low-voltage power supply of the invention
Fig. 2 is an exploded view of the lithium ion low voltage power supply of the present invention.
Fig. 3 is a schematic diagram of the heating of the lithium ion battery module of the present invention.
Fig. 4 is a diagram of the low-temperature discharge performance of the lithium ion low-voltage power supply of the invention.
FIG. 5 is a schematic diagram of the rotating speed of the lithium ion low-voltage power supply when the whole vehicle starts at low temperature.
FIG. 6 is a schematic current diagram of the lithium ion low-voltage power supply during low-temperature vehicle starting.
Fig. 7 is a graph of the vibration resistance of the lithium ion low voltage power supply of the present invention.
Fig. 8 is a parking performance diagram of the lithium ion low voltage power supply of the present invention.
In the figure: 1-a box body; 2-cover plate; 3-a lithium ion battery module; 4-a controller; 5-a temperature detection module; 6-a switch; 7-heating the film; 8-power generation module.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the present invention provides a method for preparing a lithium ion low voltage power supply for a commercial vehicle, comprising the steps of:
the method comprises the following steps: firstly, selecting a 3C-15C power type lithium ion battery monomer, attaching a heating film 7 to the surface of the lithium ion battery monomer, wherein the anode and the cathode of the heating film are arranged on the same side of the lithium ion battery monomer, so that the heating film is convenient to electrically connect; then selecting a metal connecting piece with a shape required by design, and connecting 2 or more lithium ion battery monomers in parallel to form a lithium ion battery module meeting the capacity requirement; and then connecting 7-10 lithium ion battery modules in series through metal connecting pieces, and connecting wires to the positive and negative electrodes of the battery according to the sequence of +/- … +/-899 +/-to form the lithium ion battery module 3 and then fixing the lithium ion battery module in the box body 1.
Step two: pouring the electronic pouring sealant onto the fixed lithium ion battery module 3 by adopting a potting process, controlling the potting thickness to be 5-50 mm, vacuumizing the potted sample piece with the vacuum degree of-0.08 MPa to-0.05 MPa, keeping the vacuum degree in an environment of 60-80 ℃ for 6-10 h until the thickness meets the requirement, and curing the electronic pouring sealant to form a potting layer which is elastic and does not influence the heat dissipation of the battery, thereby avoiding the phenomena of cracking, falling off and the like of the battery module and a connecting piece between the modules under the full working condition.
Step three: fix controller 4, switch 6 and temperature sensor 5 respectively at 2 internal surfaces of apron, electricity generation module 8 is fixed at 2 external surfaces of apron, and lithium ion battery module 3, controller 4, temperature sensor 5, switch 6, heating film 7 and electricity generation module 8 are connected according to corresponding relation of connection adoption wire or connecting piece, and the relation of connection that corresponds is: the output end of the temperature detection module 5 is connected with the input end of the controller 4, the controller 4 is connected with the lithium ion battery module 3 in parallel, the heating film 7, the switch 6 and the power generation module 8 are sequentially connected in series to form a heating loop, and the control end of the controller 4 is connected with the control end of the switch 6. And finally, sealing the box body 1 and the cover plate 2 to form the ion low-voltage power supply, wherein the sealing grade reaches IP67, and the explosion diagram of the ion low-voltage power supply is shown in figure 2.
The lithium ion low-voltage power supply prepared by the method has the working voltage of 20V-29V and the electric quantity of 1.5 KWh-4 KWh, has the capability of discharging at a large rate in a low-temperature environment, further ensures that the starting function of a commercial truck is not limited by a use area, and can completely meet the starting capability of the use area of the whole truck above-35 ℃.
When the prepared lithium ion low-voltage power supply is applied to a commercial vehicle, as shown in fig. 3, the controller controls the switch of the heating circuit, when the controller detects that the ambient temperature (namely the surface temperature of the lithium ion battery) is greater than 0 ℃ through the temperature detection module, the control switch is switched off, when the ambient temperature is less than or equal to 0 ℃, the control switch is switched on, the heating circuit forms a passage, the power generation module generates power by absorbing sunlight and supplies power to the heating film, so that heat is generated, and the lithium ion battery module is heated.
In the above scheme, the lithium ion battery monomer is a lithium titanate battery monomer or a lithium iron phosphate battery monomer or a lithium manganate battery monomer. The lithium ion battery monomer is a lithium ion battery with the working voltage of 2.4V-3.7V; the discharge rate of the lithium ion battery monomer is required to be 3-15C; the lithium ion battery monomer can be stored for more than 24 hours at the ambient temperature of minus 40 ℃ to 60 ℃ and can be discharged for more than 5s at 5C to 8C.
Example 1:
attaching a heating film on the surface of a lithium titanate battery monomer, connecting 4 lithium ion battery monomers of 2.4V in parallel to form a lithium ion battery module of 0.36KWh, connecting 10 lithium ion battery modules in series by adopting a direct-discharge metal connecting piece to form a lithium ion battery module 2, and fixing the lithium ion battery module 2 in a box body; the switch is connected in series between the heating film and the power generation module. Pouring the prepared electronic pouring sealant into the box body by a potting method until the electronic pouring sealant liquid surface is 8mm higher than the highest surface of the lithium ion battery module, controlling the surface pouring thickness to be 5 mm-8 mm, and controlling the thickness of the metal connecting piece to be 35 mm-40 mm, so that the lithium ion battery module and the outer box are integrated on the premise of ensuring that the heat dissipation of the battery is not influenced. And then placing the cast box body into a vacuum oven for vacuumizing, wherein the vacuum degree is-0.08 Mpa, keeping the vacuum degree for 5-10 min, opening the vacuum oven to check that the thickness meets the requirement, then placing the box body into a vacuum oven at 60 ℃ for 10h, and curing and forming the box body, wherein the vacuum degree is-0.05 Mpa. After solidification, the controller 3, the temperature sensor and the switch are fixed in the cover plate and electrically connected according to the connection relationship, and finally the box body and the cover plate are sealed, wherein the sealing grade reaches IP67, and a 3.6KWh lithium ion low-voltage power supply is formed.
Example 2:
connecting 3 lithium iron phosphate ion battery monomers of 3.2V in parallel to form a lithium ion battery module of 0.45KWh, connecting 8 lithium ion battery modules in series by adopting a triangular connecting piece to form a lithium ion battery module 2, and fixing the lithium ion battery module 2 in a box body; pouring the prepared electronic pouring sealant into the box body by a potting method until the surface of the electronic pouring sealant is 15mm higher than the highest surface of the lithium ion battery module 2, controlling the surface pouring thickness to be 10-15 mm, and controlling the thickness of the metal connecting piece to be 45-50 mm, so that the lithium ion battery module and the box body are integrated on the premise of ensuring that the heat dissipation of the battery is not influenced; and then placing the cast box body into a vacuum oven for vacuumizing, wherein the vacuum degree is-0.08 Mpa, keeping the vacuum degree for 5-10 min, opening the vacuum oven to check that the thickness meets the requirement, then placing the box body into a vacuum oven at 80 ℃ for keeping the vacuum degree for 6h, and curing and forming the box body at the vacuum degree of-0.05 Mpa. After solidification, the controller 3, the temperature sensor and the switch are fixed in the cover plate and electrically connected according to the connection relationship, and finally the box body and the cover plate are sealed, wherein the sealing grade reaches IP67, and a 3.6KWh lithium ion low-voltage power supply is formed.
Example 3:
connecting 2 3.65V ternary lithium battery monomers in parallel to form a 0.51KWh lithium ion battery module, connecting 7 lithium ion battery modules in series by adopting a soft connection type connecting piece to form a lithium ion battery module 2, and fixing the lithium ion battery module 2 in a box body; pouring the prepared electronic pouring sealant into the box body by a potting method until the surface of the electronic pouring sealant is 8mm higher than the highest surface of the lithium ion battery module 2, controlling the surface pouring thickness to be 5 mm-8 mm, and controlling the thickness of the metal connecting piece to be 30 mm-35 mm, so that the lithium ion battery module and the box body are integrated on the premise of ensuring that the heat dissipation of the battery is not influenced. And then placing the cast box body into a vacuum oven for vacuumizing, wherein the vacuum degree is-0.08 Mpa, keeping the vacuum degree for 5-10 min, opening the vacuum oven to check that the thickness meets the requirement, then placing the box body into a vacuum oven at 60 ℃ for 10h, and curing and forming the box body, wherein the vacuum degree is-0.05 Mpa. After solidification, the controller 3, the temperature sensor and the switch are fixed in the cover plate and electrically connected according to the connection relationship, and finally the box body and the cover plate are sealed, wherein the sealing grade reaches IP67, and a 3.6KWh lithium ion low-voltage power supply is formed.
After the lithium ion low-voltage power supplies prepared in the first embodiment, the second embodiment and the third embodiment are tested, the ultralow temperature discharge performance can reach-40 ℃, and the figure is shown in figure 4; the starting capability of the extremely low temperature reaches-35 ℃, as shown in figure 5 and figure 6; after the vibration resistance reaches 5G acceleration/30 Hz frequency and vibrates for 8 hours, the starting of the whole vehicle can be met, and the internal parts of the power supply do not crack or fall off, as shown in figure 7; under the environment of 37 ℃, the power supply capacity of the parking cold air conditioner reaches more than 3h, and the figure is 8.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. A preparation method of a lithium ion low-voltage power supply for a commercial vehicle is characterized by comprising the following steps: the method comprises the following steps:
step 1, attaching a heating film to the surfaces of lithium ion battery monomers, connecting a plurality of lithium ion battery monomers attached with the heating film in parallel to form a lithium ion battery module, connecting a plurality of lithium ion battery modules in series to form a lithium ion battery module, fixing the lithium ion battery module in a box body, and leading out a connecting wire of a positive electrode and a negative electrode of the lithium ion battery module and a connecting wire of the heating film;
step 2, pouring the electronic potting adhesive into the box body until the electronic potting adhesive completely covers the lithium ion battery module, placing the poured box body in a vacuum environment for vacuumizing, and placing the vacuumized box body in a high-temperature environment for a period of time to solidify the electronic potting adhesive;
and 3, fixing the controller, the temperature sensor and the switch on the inner surface of the cover plate, then connecting the controller and the lithium ion battery module in parallel, respectively connecting the anode and the cathode of the lithium ion battery module with the anode post and the cathode post on the cover plate, connecting the heating film and the switch in series and then connecting the heating film and the switch to the heating module outside the box body, and finally connecting the cover plate and the box body in a sealing manner to form the low-voltage power supply.
2. The method for manufacturing a lithium ion low voltage power supply for commercial vehicles according to claim 1, wherein: the thickness of the electronic pouring sealant covered on the surface of the lithium ion battery module is 5-50 mm.
3. The method for manufacturing a lithium ion low voltage power supply for commercial vehicles according to claim 1, wherein: the vacuum degree of the vacuum pumping is-0.08 MPa to-0.05 MPa.
4. The method for manufacturing a lithium ion low voltage power supply for commercial vehicles according to claim 1, wherein: the vacuumizing time is 5-10 min.
5. The method for manufacturing a lithium ion low voltage power supply for commercial vehicles according to claim 1, wherein: the temperature of the high-temperature environment is 60-80 ℃.
6. The method for manufacturing a lithium ion low voltage power supply for commercial vehicles according to claim 1, wherein: the time for placing the lithium ion battery module in a high-temperature environment is 6-10 h.
7. The method for manufacturing a lithium ion low voltage power supply for commercial vehicles according to claim 1, wherein: the lithium ion battery monomer is a lithium titanate battery monomer or a lithium iron phosphate battery monomer or a lithium manganate battery monomer.
8. The method for manufacturing a lithium ion low voltage power supply for commercial vehicles according to claim 1, wherein: the heating film is a graphene sheet.
9. The method for manufacturing a lithium ion low voltage power supply for commercial vehicles according to claim 1, wherein: the power generation module is a solar panel.
10. The method for manufacturing a lithium ion low voltage power supply for commercial vehicles according to claim 1, wherein: the temperature detection module is a temperature sensor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911178722.5A CN110890593A (en) | 2019-11-27 | 2019-11-27 | Preparation method of lithium ion low-voltage power supply for commercial vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911178722.5A CN110890593A (en) | 2019-11-27 | 2019-11-27 | Preparation method of lithium ion low-voltage power supply for commercial vehicle |
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| CN110890593A true CN110890593A (en) | 2020-03-17 |
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| CN201911178722.5A Pending CN110890593A (en) | 2019-11-27 | 2019-11-27 | Preparation method of lithium ion low-voltage power supply for commercial vehicle |
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Cited By (1)
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| WO2024244212A1 (en) * | 2023-05-26 | 2024-12-05 | 阳光电源股份有限公司 | Energy storage module and sealing structure thereof |
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