CN114744303A - Soft packet of lithium battery power supply system of lithium iron phosphate - Google Patents

Soft packet of lithium battery power supply system of lithium iron phosphate Download PDF

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Publication number
CN114744303A
CN114744303A CN202210372961.XA CN202210372961A CN114744303A CN 114744303 A CN114744303 A CN 114744303A CN 202210372961 A CN202210372961 A CN 202210372961A CN 114744303 A CN114744303 A CN 114744303A
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CN
China
Prior art keywords
lithium
iron phosphate
battery
lithium iron
shell
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Pending
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CN202210372961.XA
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Chinese (zh)
Inventor
蒋仕平
代云飞
万志鹏
王大林
施晓渝
朱明海
董志成
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Huafu Jiangsu Lithium Electricity New Technology Co ltd
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Huafu Jiangsu Lithium Electricity New Technology Co ltd
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Priority to CN202210372961.XA priority Critical patent/CN114744303A/en
Publication of CN114744303A publication Critical patent/CN114744303A/en
Pending legal-status Critical Current

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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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or 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
    • H01M10/05—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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621—Binders
    • H01M4/622—Binders being polymers
    • H01M4/623—Binders being polymers fluorinated polymers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • 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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • 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
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/519—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • 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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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

The invention relates to a lithium iron phosphate soft package lithium battery power supply system which comprises a shell, wherein a lithium battery pack and a battery management system BMS are arranged in the shell, the lithium battery pack comprises a plurality of lithium iron phosphate power soft package lithium ion batteries which are arranged in a fitting mode and assembling plates, tabs of the lithium iron phosphate power soft package lithium ion batteries are sequentially connected in series through the assembling plates, a negative electrode of the lithium iron phosphate power soft package lithium ion battery positioned on the outermost side is electrically connected with the battery management system BMS, a positive electrode of the lithium iron phosphate power soft package lithium ion battery positioned on the other outermost side is electrically connected with a positive electrode wire of a charging interface wire harness and a positive electrode wire of a discharging interface wire harness, and negative electrode wires of the charging interface wire harness and the discharging interface wire harness are electrically connected with a via hole pad on the battery management system BMS. The invention has the characteristics of low temperature resistance, excellent low temperature starting performance, small temperature rise, strong power and higher safety performance, has the advantages of simple assembly process, high efficiency and low cost, and can realize real-time protection on the charge and discharge of the lithium battery.

Description

Soft packet of lithium battery power supply system of lithium iron phosphate
Technical Field
The invention relates to a lithium iron phosphate soft package lithium battery power supply system, and belongs to the technical field of lithium ion batteries.
Background
Currently, most electric wheelchairs use a ternary lithium ion battery as a power source. The ternary lithium ion battery has the advantages of high energy density, excellent low-temperature performance and the like, but has poor high-temperature performance and relatively poor safety. Compared with a ternary lithium ion battery, the lithium iron phosphate battery has low energy density and high safety performance, but the lithium iron phosphate battery is sensitive to temperature, so that the low-temperature performance of the lithium iron phosphate battery is poor, and the characteristic always restricts the application of the lithium iron phosphate battery in a low-temperature environment.
More importantly, the service life of the lithium iron phosphate power soft package lithium ion battery is longer than that of a lead-acid battery and a ternary lithium ion battery, the use cost can be saved, the lithium iron phosphate power soft package lithium ion battery can support large-current charging and discharging, the charging efficiency of the battery can be improved, the safety performance is high, and the high-temperature performance is excellent. However, the soft package power lithium ion battery has the disadvantages of frequent charging and discharging, or overcharge, overdischarge, short circuit, over-temperature and the like, and the using frequency of the soft package power lithium ion battery is greatly reduced, and certain potential safety hazards exist.
Disclosure of Invention
The invention provides a lithium iron phosphate soft package lithium battery power supply system applied to an electric wheelchair, which aims to overcome the defects and adopts the following specific technical scheme:
a lithium iron phosphate soft package lithium battery power supply system comprises a shell, a lithium battery pack and a battery management system BMS are arranged in the shell, the shell comprises a first shell and a second shell, the first shell is provided with a charging interface in a penetrating way, the second shell is provided with a discharge interface in a penetrating way, the lithium battery pack comprises a plurality of lithium iron phosphate power soft package lithium ion batteries which are arranged in a fitting way and an assembling plate, the tabs of the lithium iron phosphate power soft package lithium ion battery are sequentially connected in series through the assembling plate, the negative electrode of the lithium iron phosphate power soft package lithium ion battery positioned at the outermost side is used as the total negative electrode of the lithium battery pack and is electrically connected with the battery management system BMS, the positive electrode of the lithium iron phosphate power soft package lithium ion battery positioned at the outermost side is used as the total positive electrode of the lithium battery pack and is electrically connected with the charging interface and the positive electrode wire of the discharging interface wire harness, and negative wires of the charging interface and the discharging interface wire harness are electrically connected with a via hole welding disc on the battery management system BMS.
Further, soft packet of lithium ion battery's of lithium iron phosphate power electricity core includes anodal and negative pole, anodal LPF (lithium iron phosphate), SP (conductive carbon black), PVDF (polyvinylidene fluoride) and NMP (methyl pyrrolidone) of including, the mass ratio is 100, 4.34 and 133 in proper order, the negative pole includes negative pole carbon microballon, SP (conductive carbon black), PVDF (polyvinylidene fluoride), oxalic acid and NMP (methyl pyrrolidone), and the mass ratio is 100, 2.14, 4.81, 0.16 and 131 in proper order.
Furthermore, the first shell and the second shell are connected and fixed through self-tapping screws.
Furthermore, EVA foam is laid in the second shell and the first shell.
Furthermore, the second shell, the first shell and the EVA foam are made of flame-retardant materials.
Furthermore, a protective sleeve is coated outside the lithium battery pack.
Furthermore, the protective sleeve is made of epoxy resin materials.
Further, the first shell is provided with a handle, and the second shell is provided with a plurality of bulges.
Furthermore, the assembly plate is made of a PCB material, a copper-clad soldering tin layer is electroplated on the surface of the assembly plate, a plurality of pole ear holes are formed in the assembly plate, and pole ears of the lithium iron phosphate power soft package lithium ion battery penetrate through the pole ear holes and are welded on the copper-clad soldering tin layer in a bending mode.
The invention has the beneficial effects that:
according to the invention, the lithium iron phosphate power soft package lithium ion battery is used as a power supply, the service life of the lithium iron phosphate power soft package lithium ion battery is far longer than that of a ternary lithium ion battery, the use cost can be saved, and more importantly, the safety of the lithium iron phosphate power soft package lithium ion battery can be ensured.
The invention improves the battery core formula of the lithium iron phosphate power soft package lithium ion battery, overcomes the defect of poor low-temperature performance of the lithium iron phosphate battery, and enables the power supply system to resist low temperature.
The specification name of the battery management system BMS selected by the invention is XL 007-8S-3C3F-15A-V1.0, the real-time protection of the charging and discharging of the lithium battery can be realized, the overcharge, overdischarge, overcurrent, over-temperature and short circuit of the lithium battery can be prevented, and the battery management system BMS has the functions of prohibiting the charging and balancing at low temperature and has high intelligent degree.
Drawings
Figure 1 is an exploded view of the overall structure of the present invention,
FIG. 2 is a voltage current graph of a lithium battery of the invention after 1C discharge after standing at a temperature of 0 ℃ for 24 hours,
figure 3 is a voltage current graph of a lithium battery of the invention after standing for 18 hours at a temperature of-10C, 2C starting for 1 minute, 1C continuing discharge,
FIG. 4 is a voltage current graph of a lithium battery of the invention after 1C discharge on standing at a temperature of-20 ℃ for 24 hours,
in the figure: the method comprises the following steps of 1-lifting handle, 2-second shell, 3-charging interface, 4-lithium iron phosphate power soft package lithium ion battery, 5-battery management system BMS, 6-protective sleeve, 7-assembly plate, 8-first shell, 9-discharging interface and 10-EVA foam.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams each illustrating the basic structure of the present invention only in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1, the present invention includes a housing in which a lithium battery pack and a battery management system BMS5 are disposed. The shell includes first casing 8 and second casing 2, and first casing 8 and second casing 2 pass through self tapping screw connection fixed, make things convenient for opening and shutting of shell. The handle 1 is arranged on one side of the first shell 8, so that the lifting, moving and carrying of the invention are convenient. First casing 8 runs through and is provided with interface 3 that charges. Both sides of the second shell 2 are provided with a plurality of bulges, and the bulges can be aligned with the clamping grooves of the battery compartment in the electric wheelchair, so that the fixing effect is achieved, and the power supply is prevented from moving in the battery compartment. The second housing 2 is provided with a discharge port 9 therethrough. All laid the cotton 10 of 3mm thick EVA bubble in first casing 8 and the second casing 2, first casing 8, second casing 2 and the cotton 10 of EVA bubble all adopt fire-retardant material. In case of battery fire, the flame retardant material can avoid further expansion of fire to a certain extent, and the safety of the electric wheelchair is improved.
The lithium battery pack is sleeved with a protective sleeve 6, and the protective sleeve 6 is made of epoxy resin materials and plays an insulating role. Lithium cell group includes the soft packet of lithium iron phosphate power lithium ion battery 4 and the equipment board 7 that 8 laminating were arranged, and lithium iron phosphate power soft packet of lithium ion battery 4's utmost point ear is established ties in proper order through equipment board 7. The assembling plate 7 is made of a PCB material and is electroplated with a copper-clad soldering tin layer on the surface of the assembling plate 7, a plurality of pole ear holes are formed in the assembling plate 7, and pole ears of the lithium iron phosphate power soft-package lithium ion battery 4 penetrate through the pole ear holes and are welded on the copper-clad soldering tin layer in a bending mode. The negative pole of the soft packet of lithium iron phosphate power lithium ion battery 4 that is located outermost one side is connected with battery management system BMS5 electricity as the total negative pole electricity of lithium cell group, and the positive pole of the soft packet of lithium iron phosphate power lithium ion battery 4 that is located outermost opposite side is connected with the positive pole line electricity of interface 3 and the interface 9 pencil that discharges that charges as the total positive pole of lithium cell group, and the negative pole line of interface 3 and the interface 9 pencil that discharges is connected with the via hole pad electricity on the battery management system BMS5 that charges.
Lithium iron phosphate power soft packet of lithium ion battery 4's electric core includes anodal and negative pole, anodal LPF (lithium iron phosphate), SP (conductive carbon black), PVDF (polyvinylidene fluoride) and NMP (methyl pyrrolidone), and the mass ratio is 100, 4.34 and 133 in proper order, the negative pole includes negative pole carbon microballon, SP (conductive carbon black), PVDF (polyvinylidene fluoride), oxalic acid and NMP (methyl pyrrolidone), and the mass ratio is 100, 2.14, 4.81, 0.16 and 131 in proper order. As shown in fig. 2, 3 and 4, the invention improves the battery core formula of the lithium iron phosphate power soft package lithium ion battery, overcomes the defect of poor low-temperature performance of the lithium iron phosphate battery, and enables the power supply system of the invention to be resistant to low temperature.
After the power supply system is fully charged, standing for 24 hours at the temperature of minus 20 ℃, and stopping discharging until the voltage is 20V, the discharge rate is 1C, and the discharge capacity is more than or equal to 90 percent of the rated capacity; standing at 0 ℃ for 24 hours, stopping discharging until the voltage is 20V, the discharge rate is 1C, and the discharge capacity is more than or equal to 96% of the rated capacity; standing at-10 deg.C for 18 hr, stopping discharging to voltage of 20V, and discharging at 2C rate for 1 min until the discharge rate is 1C.
The specification of the battery management system BMS5 selects XL 007-8S-3C3F-15A-V1.0, so that the real-time protection of charging and discharging of the lithium battery can be realized, the lithium battery is prevented from being overcharged, overdischarged, overcurrent, over-temperature and short circuit of charging and discharging, and meanwhile, the battery management system BMS5 has the functions of prohibiting charging and balancing at low temperature and has high intelligent degree. When the ambient temperature is lower than-5 ℃, the power supply system prohibits charging, and when the ambient temperature is not lower than 0 ℃, the power supply system restores charging.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (9)

1. The utility model provides a soft packet of lithium ion battery power supply system of lithium iron phosphate, a serial communication port, which comprises an outer shell, be provided with lithium cell group and battery management system BMS (5) in the shell, the shell includes first casing (8) and second casing (2), first casing (8) are run through and are provided with interface (3) that charge, second casing (2) are run through and are provided with interface (9) that discharge, lithium cell group is including soft packet of lithium iron phosphate power lithium ion battery (4) and equipment board (7) that a plurality of laminating were arranged, the utmost point ear of soft packet of lithium iron phosphate power lithium ion battery (4) establishes ties in proper order through equipment board (7), and the negative pole that is located the soft packet of lithium iron phosphate power lithium ion battery (4) of outermost one side is connected with battery management system BMS (5) as the total negative pole of lithium cell group, and the total positive pole and the interface (3) and the interface that charge of lithium cell group and lithium that the positive pole that are located the soft packet of lithium iron phosphate power lithium ion battery (4) of outermost opposite side are connected as the lithium cell group And the positive wire of the wire harness of the discharging interface (9) is electrically connected, and the negative wires of the wire harnesses of the charging interface (3) and the discharging interface (9) are electrically connected with the via hole welding pad on the battery management system BMS (5).
2. The power supply system of the lithium iron phosphate soft-package lithium battery of claim 1, characterized in that: the electric core of soft packet of lithium ion battery (4) of lithium iron phosphate power includes anodal and negative pole, anodal LPF (lithium iron phosphate), SP (conductive carbon black), PVDF (polyvinylidene fluoride) and NMP (methyl pyrrolidone), and the mass ratio is 100, 4.34 and 133 in proper order, the negative pole includes negative pole carbon microballon, SP (conductive carbon black), PVDF (polyvinylidene fluoride), oxalic acid and NMP (methyl pyrrolidone), and the mass ratio is 100, 2.14, 4.81, 0.16 and 131 in proper order.
3. The power supply system of the lithium iron phosphate soft-package lithium battery of claim 1, characterized in that: the first shell (8) and the second shell (2) are connected and fixed through self-tapping screws.
4. The power supply system of the lithium iron phosphate soft-package lithium battery of claim 1, characterized in that: EVA foam (10) is laid in the second shell (2) and the first shell (8).
5. The lithium iron phosphate soft-package lithium battery power supply system of claim 4, characterized in that: the second shell (2), the first shell (8) and the EVA foam (10) are made of flame-retardant materials.
6. The power supply system of the lithium iron phosphate soft-package lithium battery of claim 1, characterized in that: and a protective cover (6) is coated outside the lithium battery pack.
7. The power supply system of the lithium iron phosphate soft-package lithium battery of claim 6, characterized in that: the protective sleeve (6) is made of epoxy resin materials.
8. The power supply system of the lithium iron phosphate soft-package lithium battery of claim 1, characterized in that: the first shell (8) is provided with a handle (1), and the second shell (2) is provided with a plurality of bulges.
9. The power supply system of the lithium iron phosphate soft-package lithium battery of claim 1, characterized in that: the assembling plate (7) is made of a PCB material, a copper-clad soldering tin layer is electroplated on the surface of the assembling plate (7), a plurality of pole ear holes are formed in the assembling plate (7), and pole ears of the lithium iron phosphate power soft package lithium ion battery (4) penetrate through the pole ear holes and are welded on the copper-clad soldering tin layer in a bending mode.
CN202210372961.XA 2022-04-08 2022-04-08 Soft packet of lithium battery power supply system of lithium iron phosphate Pending CN114744303A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210372961.XA CN114744303A (en) 2022-04-08 2022-04-08 Soft packet of lithium battery power supply system of lithium iron phosphate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210372961.XA CN114744303A (en) 2022-04-08 2022-04-08 Soft packet of lithium battery power supply system of lithium iron phosphate

Publications (1)

Publication Number Publication Date
CN114744303A true CN114744303A (en) 2022-07-12

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Family Applications (1)

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Country Status (1)

Country Link
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