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WO2003077349A1 - Batterie aux ions de lithium rechargeable et procede de fabrication correspondant - Google Patents

Batterie aux ions de lithium rechargeable et procede de fabrication correspondant Download PDF

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Publication number
WO2003077349A1
WO2003077349A1 PCT/CN2003/000171 CN0300171W WO03077349A1 WO 2003077349 A1 WO2003077349 A1 WO 2003077349A1 CN 0300171 W CN0300171 W CN 0300171W WO 03077349 A1 WO03077349 A1 WO 03077349A1
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WO
WIPO (PCT)
Prior art keywords
positive
pole
negative
positive electrode
negative electrode
Prior art date
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Ceased
Application number
PCT/CN2003/000171
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English (en)
Chinese (zh)
Inventor
Yongming Ju
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Individual
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Individual
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Priority to AU2003221287A priority Critical patent/AU2003221287A1/en
Publication of WO2003077349A1 publication Critical patent/WO2003077349A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—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
    • 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • 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
    • 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
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy coatings
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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

Definitions

  • Lithium-ion power battery capable of being repeatedly charged and discharged and manufacturing method thereof
  • the present invention relates to an environmentally friendly battery that can be repeatedly charged and discharged, and more particularly, the present invention relates to a lithium ion power battery that can be repeatedly charged and discharged and a method for manufacturing the same.
  • an object of the present invention is to provide a lithium ion power battery capable of being repeatedly charged and discharged, which can solve the problem of high power charging and discharging of the lithium ion power battery.
  • the invention belongs to an environmentally-friendly battery that can be repeatedly charged and discharged.
  • the purpose is to hope that the positive and negative electrode tabs of the large-leaf tab and the separator, which have a unique design, have a multi-layered structure.
  • Negative electrode plates are arranged at regular intervals, and the electrode assembly is more sensitive to internal pressure, so it is more reliable and safer.
  • Safety valve, current collecting performance and heat dissipation performance are better. High-power repeated charge and discharge requirements, so as to achieve the wide application of lithium-ion power batteries.
  • the present invention provides a lithium-ion power battery that can be repeatedly charged and discharged.
  • Each single battery consists of a cover plate, a negative pole, a safety valve, a positive pole, a current collector plywood, an inner body, an electrolyte, a cylindrical shape or a square shape.
  • the shell is composed of the following features:
  • the positive and negative electrode groups that is, the positive electrode sheet, the negative electrode sheet and the separator together form an electrode assembly with a disc structure; the positive electrode post is connected to the positive electrode, and the negative electrode post It is connected to the negative electrode.
  • the positive electrode is made of aluminum foil of a certain thickness, and the positive electrode active material is evenly coated on both sides.
  • the negative electrode is made of copper foil of a certain thickness, and the negative electrode active material is evenly coated on both sides.
  • Unipolar ears or large-leaf multipolar ears with different intervals are shaped as long and narrow rectangular pieces (also known as flattened pieces).
  • Large-leaf monopoles and large-leaf multipolar ears are collectively referred to as large-leaf polar ears.
  • Large-leaf poles can be either raised or hidden, and the current is exported to the pole through the current collector splint; the positive pole has one or several pole poles, the negative pole has one or several pole poles, The number can be equal or different, and the diameters of the poles can be equal or different.
  • the present invention adopts a structure with large leaf poles that can reduce the current density, which can avoid the extremely harmful heat generated in the lithium ion power battery to the greatest extent.
  • the invention also provides a safety valve for a lithium ion power battery that can be repeatedly charged and discharged.
  • the compression spring is installed in the inner hole of the adjustment bolt, and the inner hole of the adjustment bolt is used to hold the compression spring and seal the steel ball. Stable, the compression spring can slide down vertically in the inner hole of the adjustment bolt, the sealing steel ball can slide down vertically in the inner hole of the adjustment bolt, and the outer diameter of the adjustment bolt is machined with a thread that matches the safety valve body; adjustment Bolts are processed with several vertical exhaust grooves, and exhaust holes are opened in the lower part of the exhaust groove; the compression spring is pressed on the upper part of the steel ball, and the lower hole of the sealed steel ball is trapped in the fluorine on the cover injection port. On the rubber ⁇ ; the pressure relief hole at the bottom of the safety valve communicates with the injection hole on the cover.
  • the invention also provides a lithium ion power battery proportion and its manufacturing method that can be repeatedly charged and discharged, including the following steps: batching- ⁇ coating (pulling)-slicing (if the tabs are directly cut, there is no Welding lugs)- ⁇ rolling- ⁇ making (welding) lugs- ⁇ winding (including casing and sealing)-filling- ⁇ forming into one ⁇ dividing.
  • the invention has a uniquely designed current collecting (current collecting) terminal, that is, an inner body formed by winding positive and negative electrodes of a large leaf tab and a diaphragm at the same time, which is more sensitive to internal pressure, and thus more reliable, safe and secure.
  • the current collecting plywood with better valve, current collecting performance and heat dissipation performance can solve the high-power repeated charging and discharging requirements of the lithium ion power battery, thereby realizing the wide application of the lithium ion power battery.
  • Figure 1-1 is a sectional view of a stacked lithium-ion power battery
  • Figure 1-2 shows a top view of a stacked lithium-ion power battery
  • Figures 1 A, 1 A-1, 1B, IB-1, 1 C, 1 C-1, 1D, 1D-1, 1E, and I E-1 represent the schematic diagrams of the large leaf pole ears on the pole pieces;
  • FIG. 2 is a cross-sectional view of a lithium ion power battery according to the present invention.
  • FIG. 3 and FIG. 4 are stacking methods of pole pieces in the lithium ion power battery of the present invention.
  • Figures 5 and 6 show the structure of a pressure spring type and a plate type safety valve, respectively.
  • each unit battery is composed of a cover plate 1, a negative pole 2, a safety valve 3, and a positive pole.
  • the outer shell 9, the negative pole 2 on the cover plate 1, the safety valve 3, and the positive pole 4 constitute the outer body of the lithium-ion power battery; multiple pairs of positive and negative electrode groups, the diaphragm, and the current collector plye constitute the inner body of the lithium-ion power battery
  • laminated body 7 also known as laminated body.
  • the structure and manufacturing process (method) of the laminated lithium-ion power battery are described below:
  • the laminated inner body 7 of a lithium-ion power battery is composed of one or more pairs of positive and negative electrode sheet groups and a separator.
  • the electrode assembly has a multi-layer structure, and the positive and negative electrode sheets are arranged at regular intervals.
  • the smallest lithium-ion power battery can consist of a pair of positive and negative electrode groups and a separator.
  • the positive electrode 1 3 is composed of an aluminum foil and a positive electrode active material (not shown in the figure).
  • the aluminum foil is a thin metal foil, and the positive electrode active material is evenly coated on both sides (either Lithium cobaltate, or lithium manganate or lithium nickelate, lithium nickel cobaltate).
  • the surface of the aluminum foil is usually smooth, but the aluminum foil with a rougher surface has better adhesion for coating active materials.
  • a suitable aluminum foil thickness ranges from 10 ⁇ m to 80 ⁇ m.
  • the optimal thickness of aluminum foil is 15 ⁇ m ⁇ 2 5 ⁇ m; when charging and discharging requirements are 2 C ⁇ 3 C or greater, other factors are excluded, and aluminum foil is used.
  • the optimal thickness is 20 ⁇ m to 4 5 ⁇ m or more.
  • Negative electrode 1 2 is composed of copper foil and negative electrode active material (not shown in the figure). Copper foil is a thin metal foil, and the negative electrode active material is evenly coated on both sides (either natural graphite, flake graphite, artificial Graphite or petroleum coke). The surface of the copper foil is usually smooth, but the copper foil with a rougher surface has better adhesion for coating active materials. The suitable thickness of copper foil is 6 ⁇ m ⁇ 50 ⁇ m.
  • the optimal thickness of copper foil is 8 ⁇ m ⁇ 20 ⁇ m; when charging and discharging requirements are 2 C ⁇ 3 C or greater, other influencing factors are excluded, and copper foil is selected
  • the optimal thickness is 15 ⁇ m ⁇ 3 5 ⁇ ⁇ or more.
  • the thickness of the metal foil is not only related to the area of the current collector, but also to the capacitance of each single pole piece.
  • the thickness of the metal foil with a larger capacitance should be slightly larger than that of the metal foil with a small capacitance. thick.
  • the metal foil should be as thin as possible in order to obtain a larger electrode sheet area when applying the same amount of active material, thereby obtaining better electrical properties.
  • the metal foil used for the positive electrode or the negative electrode can also be separately Use wire mesh or flat mesh metal foil.
  • the so-called flat mesh metal foil is formed by punching a number of fine small holes mechanically or chemically or by other methods on a thin aluminum or copper foil, and stretching it in the vertical and horizontal directions.
  • Active materials (excluding conductive agents, binders, and dispersants) of previous lithium-ion batteries accounted for about 90% of the total ingredients, and the remaining about 10% were conductive agents, binders, and dispersants.
  • the active material of the lithium ion power battery according to the present invention The amount has increased greatly regardless of the positive or negative electrode, which is about 93% to 95% or even higher.
  • the density of the positive electrode active material is 0.02 g to 0.06 g per square centimeter, when the area of the positive electrode piece is less than or equal to 1 0 0 O mmx 5 0 0 mm and greater than or equal to 1 0 0 mm x 5 0 0 m 2, the optimal density of the positive electrode active material per square centimeter is 0.
  • the density of the negative electrode active material per square centimeter is approximately 0. 0 1 ⁇ ⁇ 0. 0 3 8 .
  • the optimal density of the negative electrode active material per square centimeter is 0.04 g ⁇ 0. 0 2 1 g.
  • the main characteristics of lithium-ion power batteries should be suitable for power applications, and they must meet the requirements of high-power charge and discharge.
  • An important structure in the present invention is to use a large-area collector (current-collection) terminal, that is, a large leaf tab, which is more conducive to current conduction and heat dissipation, and can fully meet the requirements of high-power charge and discharge.
  • the current collecting (collecting) terminal is called a large leaf tab.
  • FIGS. 1A-1 and IB-1 it can be seen that there is a large leaf tab 1 1 on the positive electrode 13, and as shown in FIG. 1A and FIG.
  • large-leaf monopole ear there is only one large leaf tab 1 0 on the negative electrode 12, It is called a large-leaf monopole ear; as shown in Figures 1C and 1C-1, it can be seen that there are multiple large-leaf pole ears on the positive and negative plates, which are called large-leaf multipole ears. Large-leaf monopoles and large-leaf multipoles are collectively referred to as large-leaf poles.
  • Large leaf tabs should use a larger cross-sectional area as far as possible, that is, the tabs should be as wide and thick as possible, and the current collecting (collecting) path should be as short as possible, which is beneficial to the current. Export and cooling.
  • the positive and negative electrodes usually have only one large leaf tab; for a large-capacity lithium-ion power battery, there are several large leaf tabs.
  • large-leaf multipolar ears can better conduct and dissipate heat than large-leaf monopolar ears.
  • the large-leaf monopole ears can also be as shown in Figure ID and Figure ID-1.
  • the large-leaf pole ears of the positive and negative poles can be drawn from the side ends of the pole pieces in different directions.
  • the maximum width of the large leaf tabs from the side ends of the pole pieces in different directions can be the same as the side where the large leaf tabs are located, which is more conducive to the flow and heat dissipation of lithium ion power batteries.
  • the width of the large leaf monopoles must not be greater than the location of the large leaf tabs.
  • the side of the side is half (half) long.
  • the maximum height of the lobe poles is not greater than its own (lobe poles) width, preferably smaller than its width. The smaller the height of the lobe pole, the better.
  • the large-leaf multipole ears can be arbitrarily set at any position on the long or short sides of the positive and negative plates as required.
  • the centerline position should be located at about 1/4 or 3/4 of the side length of the laminated positive and negative plates as much as possible.
  • the inner edge line of the large leaf tab should be as close as possible to the center line of the side where the large leaf tab is located, but it must not obstruct the other tab's tab. Insulation measures must be taken to prevent short-circuiting with the other tab's tab.
  • the positive and negative electrodes of a laminated lithium-ion power battery are usually cut into rectangular pieces.
  • the best aspect ratio for rectangular tablets is 6.2: 3.8 or 6: 4.
  • the positive and negative electrode pieces can also be made into a circle or other desired shapes.
  • the dimensions of the positive and negative electrode sheets are different due to their process requirements. Since the active material of the positive electrode is much more expensive than the active material of the negative electrode, the length and width of the negative electrode sheet are slightly larger than the positive electrode sheet when cutting. This approach not only saves resources, but also gives full play to the material properties of the positive electrode.
  • the positive electrode 1 3 and the negative electrode 1 2 are usually directly cut into rectangular pieces with large leaf monopoles or large leaf multipoles.
  • the method of making large-leaf pole tabs can also be directly processed to form pole pieces by rolling or shearing.
  • the width of the large leaf tabs on the positive electrode 13 is the same as the width of the large leaf tabs on the negative electrode 12.
  • the width of the respective large leaf tabs on the positive and negative electrodes can also be unequal under special requirements.
  • the tab widths on the positive and negative electrodes should be equal.
  • the width of the large leaf tabs on the negative electrode 12 can be larger than the large leaf tabs on the positive electrode 1 3 Ear; in the case of high power discharge without fast high power charging, the positive electrode
  • the width of the large lobes on the negative electrode 12 may be greater than the width of the large lobes on the negative electrode 12.
  • connection between the lobe pole and the current collector can be a clear angle (that is, the connection is a right angle, an obtuse angle without an arc), or a smooth arc connection (that is, the connection has an R angle), as shown in Figure 1A.
  • the R in the connection of Figure 1A-1 not only has higher mechanical strength, but also helps to prevent the concentration of heat and cause the pole tabs or even the pole pieces to melt.
  • the positive and negative plates of lithium-ion power batteries use corresponding tabs, that is, when the positive electrode 1 3 uses large-leaf monopole ears, and the negative electrode 12 usually uses large-leaf monopole ears; the positive electrode 1 3 uses large-leaf multipoles.
  • the ears and the negative poles 1 2 should also adopt large leaf multipole ears.
  • the tabs on the positive and negative electrodes should be equivalent and the number should be equal.
  • large-leaf multipole ears can be used for the negative electrode, and large-leaf monopoles can be used for the positive pole; in the case of high-power discharge without fast high-power charging, Large-leaf multipole ears can be used for the positive pole, and large-leaf monopole ears can be used for the negative pole.
  • the manufacturing method of the tabs is whether the directly cut tabs 10/1 1 or the welded tabs are raised heads. It can be seen that the tabs are significantly higher than the active material coated on the tabs. The advantage is that it is convenient Scraping powder.
  • the large-leaf tabs shown in Figure ID and Figure 1D-1 are hidden-head style tabs.
  • This hidden-head-style large tabs 17/1 8 can make fuller use of lithium. Space inside the ion battery.
  • the form of the hidden head is exactly the opposite of that of the raised head.
  • the raised and hidden large leaf tabs can be on the long sides of the rectangular positive and negative tabs, or on the short sides of the positive and negative tabs. From the perspective of rationality, the large leaf tabs should be as positive and negative as possible. The long side of the pole piece.
  • the tabs can be fabricated by welding as shown in Figures 1B and 1B-1 (15/16).
  • the welding of several metal pieces not only increases the mechanical strength, improves the conductivity, but also improves the heat dissipation performance. Therefore, it is best to use welded large leaf poles to make large leaf poles.
  • Welds 1 4 must be firm.
  • Welding The advantage of the tab is that the cut pole piece has less burrs.
  • the positive electrode is made of aluminum, and the negative electrode is made of nickel or copper.
  • the shape of the large leaf tabs can be designed and processed into square, rectangular, semi-circular, trapezoidal or other shapes that facilitate flow and heat dissipation.
  • the best tab shape is a trapezoid with R rounded corners at the connection.
  • the basic function of the separator is to isolate the positive and negative electrodes, prevent the battery from short circuit, and adsorb and maintain the electrolyte.
  • the separator In addition to having good insulation properties, stable chemical and electrochemical properties, the separator must have a certain mechanical strength and high electrical conductivity. Therefore, porous polyolefin materials are the most suitable. In view of the characteristics that lithium-ion power batteries must be charged and discharged with high power, higher safety performance is required.
  • the lithium ion power battery involved in the present invention mainly uses a polyethylene separator having a microporous structure and a low current cut-off temperature of 15 to 80 ⁇ m.
  • the selection principle of the separator is as thin as possible, but when the area of the positive or negative electrode piece is less than or equal to 1
  • the optimal thickness of the separator is 20 ⁇ ⁇ ⁇ 4 0 ⁇ ⁇ ;
  • the optimal thickness of the separator is 40 ⁇ m or more.
  • the separator of the lithium ion power battery can also be directly coated with a slurry of a polyolefin-based material containing a reasonable amount of a pore-forming agent on the surface of the positive electrode sheet after rolling (the immersion method can also be used to immerse the positive electrode sheet in In the above slurry), the positive electrode sheet is put into a specific solvent to extract a pore-forming agent to form a satisfactory separator integrated with the positive electrode sheet.
  • the shape of the separator is generally consistent with the shape of the positive and negative electrode sheets. Because all positive
  • the area of 1 3 is slightly smaller than that of the negative electrode 12, so the positive electrode 1 3 is wrapped with a separator.
  • the separator is usually made into a bag shape 19 or a book shape 19-1 in order to fit or clamp the positive electrode 13.
  • the bag-shaped diaphragm can heat-seal three sides, or only the adjacent two sides; a diaphragm that only heat-seals adjacent two sides is easier to assemble.
  • the area of the separator is larger than the positive and negative electrodes in both length and width. Except for the ears, the separator 19/1 9-1 must completely surround the positive electrode 1 13 and not expose the edges to prevent short circuit.
  • the material of the lithium ion power battery pole is a metal material with excellent electrical conductivity and thermal conductivity. In addition to a certain strength, it must also have good heat dissipation performance.
  • the pole can be cylindrical or sheet-shaped to facilitate faster heat dissipation by lithium ion power.
  • the poles can be installed on any side surface of the lithium-ion power battery; according to different needs, the positive and negative poles can also be installed on different side surfaces of the lithium-ion power battery.
  • one positive pole and one negative pole of a lithium-ion power battery can meet the needs.
  • more poles of a larger-capacity lithium ion power battery can be installed, for example, two positive poles and two negative poles can be installed at the same time.
  • the number of positive and negative poles can be equal or different.
  • the number of positive and negative poles should be equal; in the case of fast high power charging without high power discharge, the number of negative poles can be equal to or greater than the number of positive poles The number of positive poles; in the case of high power discharge without fast high power charging, the number of positive poles can be equal to or greater than the number of negative poles.
  • the diameter of the pole can also be adjusted to meet the above needs.
  • the diameters of the positive and negative poles should be equal; in the case of fast high-power charging without high-power discharge, the negative pole
  • the diameter of the pole can be equal to or larger than the diameter of the positive pole; in the case of high power discharge without fast high power charging, the diameter of the positive pole can be equal to or larger than the diameter of the negative pole The diameter of the pole.
  • Lithium-ion power batteries use multiple electrolytes to accommodate wider temperature changes.
  • Multi-component electrolyte refers to a mixture of two or more solvents and lithium hexafluorophosphate.
  • the lithium-ion power battery uses:
  • LIPF 6 / EC DMC: EMC
  • the solvent ratio is 0.95-1.05: 0.95-1.05: 0.95-1.05; or (4).
  • the solvent ratio is 0.95 to 1.05: 0.95 to 1.05: 0.95 to 1.05: 0.95-1.05.
  • the lithium-ion power battery case according to the present invention is a part of a lithium-ion power battery, and is also called a battery case.
  • the cell case is also one of the positive and negative poles.
  • the cell case is also referred to as an electrode case.
  • the cell case of high-power lithium-ion power batteries should be avoided as much as possible.
  • the enclosure must be insulated from the pole. However, in special cases, the case can also become an electrode case.
  • the square case 9 of a lithium-ion power battery consists of several flat surfaces.
  • Lithium-ion power battery cell shells have higher airtightness requirements and higher strength, usually metal shells with a certain rigidity, such as stainless steel cell shells.
  • the cell shell of the lithium-ion power battery of the present invention can be either a metal shell, or made of polytetrafluoroethylene or polypropylene or other suitable plastics, and can be bonded or injection-molded. The safety performance is better than that of metal cells. shell.
  • the upper or side of the shell of the lithium-ion power battery is designed and processed with plug-in ports that are convenient for series and parallel connection, so that the batteries can be connected in series or in parallel to form a battery pack.
  • heat sinks (thermal bridges) 9-1 can be designed and processed on or inside the housing.
  • the cover of the lithium-ion power battery must match the battery case, and the airtightness is high.
  • the cover of the lithium-ion power battery can also be made of PTFE or polypropylene or any other strong acid-resistant plastic with a certain strength and injection molding.
  • the safety valve 3 of the lithium-ion power battery is very important. It is a safety device provided to prevent other accidents such as overcharging and short-circuiting. It can instantly remove the pressure exceeding the design.
  • the pressure relief hole at the bottom of the safety valve is also the injection port of the lithium-ion power battery.
  • the reset mechanism is shown in Figure 6-1, 6-2, 6-3, 6-4, 6-5, 6-6. They are as follows:
  • the structure of the pressure spring safety valve is shown in Figure 5 -1, 5-2.
  • the compression spring (spring) 2 5 is installed in the inner hole of the adjustment bolt 2 3.
  • the inner hole of the adjustment bolt is actually a compression spring, a cage of 'sealed steel ball 2 2', and the compression spring can be longitudinal in the inner hole of the adjustment bolt. It can move up and down without being able to swing laterally.
  • the sealing steel ball can also be moved up and down in the inner hole of the adjustment bolt without being able to swing horizontally.
  • the outer diameter of the adjustment bolt is machined with a thread that matches the safety valve body 21, so the adjustment bolt is installed on the safety valve body, and the height can be adjusted at will through the keyhole 27.
  • the keyhole also serves as an exhaust.
  • the adjusting bolt When the rotary adjusting bolt applies pressure to the compression spring, the sealing steel ball is fixed by the compression spring.
  • the adjusting bolt is processed with a plurality of vertical exhaust grooves 2 4.
  • the adjusting bolt can be rotated through the exhaust groove to rotate it, and an exhaust hole 2 8 is opened at the lower part of the exhaust groove.
  • the lowest layer is fluoro rubber ⁇ 26 or other corrosion-resistant aprons. It is pressed or attached to the liquid injection hole on the lid 1 of the lithium ion battery, and the sealed steel ball is trapped under fluoro rubber ⁇ 26 or other resistant materials. Corroded rubber pad.
  • the pressure relief hole on the bottom of the safety valve is in communication with the injection hole on the cover plate 1, so the pressure relief hole is the injection hole when the liquid is injected.
  • fluororubber or other corrosion-resistant rubber mats must have some elasticity, so that when the steel ball is pressed against the fluororubber or other corrosion-resistant rubber mats, the fluororubbers or other corrosion-resistant rubber mats will deform.
  • the injection hole can be sealed.
  • the compression spring with its bottom inner ring just snaps on the upper part of the sealing steel ball, and the lower part of the sealing steel ball is trapped on the fluoro rubber ring 26 or other corrosion-resistant rubber pad on the battery cover, which restrains the sealing steel ball from slipping. open.
  • the sealed steel ball automatically closes the injection port due to the pressure of the compression spring to keep the inside of the battery isolated from the external environment.
  • the structure of the tablet safety valve is shown in Figures 6-1 and 6-2.
  • the reverse bow spring 30 is installed on the lower part of the adjustment bolt 23, and the adjustment bolt is processed with a thread matching the safety valve body 21, so the adjustment bolt is installed on the safety valve body The bottom is pressed tightly on the anti-bow shrapnel. Turn the height adjustment bolt of the keyhole 8 to adjust the tension of the anti-bow spring.
  • the safety valve body is processed with a rectangular exhaust groove 3 1.
  • the anti-bend spring is installed in the rectangular groove and can not be rotated horizontally except that it can spring up and down.
  • the inner diameter of the lower part of the safety valve body is small, forming a cage, and the sealing steel balls 22 can be vertically moved down in the cage.
  • the anti-bow shrapnel is processed with a process assembling hole 3 3, which is crimped on the upper part of the steel ball to fix and seal the steel ball.
  • the lower hole of the sealed steel ball is trapped on the fluorine rubber ring or other corrosion-resistant rubber pad on the cover injection port, which not only fixes the sealed steel ball, but also seals the battery.
  • fluoro rubber ⁇ or other corrosion-resistant rubber pads must have a certain elasticity, so that when the steel ball is pressed against the fluoro rubber ⁇ or other corrosion-resistant rubber pads, the fluoro rubber ⁇ or other corrosion-resistant stock pads will deform.
  • the injection hole can be sealed.
  • the compression spring is pressed against the upper part of the sealed steel ball with the inner inner part of the bottom part, and the lower part of the sealed steel ball is trapped on the fluorine rubber on the battery cover ⁇ 2 6 or other corrosion-resistant rubber pads to restrain the sealed steel ball from slipping. open.
  • the sealed steel ball automatically closes the injection port due to the pressure of the compression spring to keep the inside of the battery isolated from the external environment.
  • the pressure inside the battery is greater than the set value, it will Automatically lift the sealed steel ball to release the pressure, and the gas will be immediately discharged from the pressure release hole 2 9 and escape along the exhaust groove 31 from the exhaust hole 3 2 and the key hole 2 7.
  • the pressure of the anti-bow spring is sufficient to compress the sealing steel ball again to seal the pressure relief hole.
  • the anti-bow shrapnel can be designed and processed into a flat-shaped anti-bow shrapnel.
  • the flat-shaped anti-bow shrapnel works like a half-moon anti-bow shrapnel.
  • the pressure of the tablet-type safety valve can also be adjusted by the screws 3 4 as shown in Figure 6-2.
  • the safety valve can also be designed with several vent holes 3 5 in the body.
  • the pressure relief hole 2 9 on the fluorine rubber ⁇ 2 6 is the communication hole with the liquid injection hole on the cover plate 1 and also communicates with the pressure relief hole on the bottom of the safety valve, so it is not marked separately.
  • the fluoro rubber ⁇ 26 may be replaced by any other suitable apron.
  • the anti-bow shrapnel can be designed and processed into a flat shape or a half-moon shaped anti-bow shrapnel as shown in Figure 6-1.
  • the working principle of the flat-shaped anti-bow shrapnel is the same as that of the half-moon anti-bow shrapnel.
  • the sealed steel ball 2 2 can be designed and processed into a ball 2 2-1 with a horizontal transverse groove, and fluoro rubber 2 6- One is clamped in the horizontal groove on the sealed steel ball 2 2-1.
  • the fluorine rubber ⁇ 2 6-1 seals the injection hole.
  • a fixed small handle 3 5 can also be processed thereon, and a compression spring or an anti-bow spring is sleeved on the fixed small handle.
  • the compression spring or reverse bow spring presses the sealing steel ball 2 2-1 and the fluoro rubber ⁇ , 6-1 tightly seals the injection hole.
  • the internal pressure is greater than the permissible value and the sealing steel ball 2> 2-1 is jacked up, the fluorine rubber ⁇ 2 6-1 is lifted upward at the same time, and the internal pressure is quickly removed.
  • the sealing steel ball 2 2 can also be designed and processed into a sealing head 2 2-2. Compared with the steel ball 2 2 or 2 2 1 1, the lower part of the sealing frustum protrudes into the injection hole, so the reset is more reliable.
  • the sealing frustum can also be processed with a fixed small handle 3 6, and a compression spring or a reverse bow spring is sleeved on the fixed small handle. When the internal pressure is less than the allowable value, the compression spring or reverse bow spring presses the sealing frustum 2 2-2. The pressure of the fluoro rubber ⁇ 2 6 deforms in the sealing frustum and tightly seals the injection hole. When the internal pressure is greater than the allowable value, the top sealing cone 2 2-2 is quickly released.
  • the sealing frustum can also be designed and processed into 2 2-3 with a horizontal horizontal groove on it, and the fluoro rubber ⁇ 2 6-1 is hooped in the horizontal horizontal groove on the sealing frustum 2 2-3.
  • the fluoro rubber ring 2 6-1 seals the injection hole.
  • the internal pressure is greater than the allowable value and the sealing cone 2 2-3 is lifted up, the fluorine rubber ⁇ 2 6-1 is lifted upward at the same time, and the internal pressure is quickly removed.
  • the sealing steel ball 2 2 or 2 2-1 or the sealing frustum 2 2-2, 2 2-3 can also be designed as a hollow sleeve, and the compression spring is inserted into a hollow sleeve with better guiding performance. in.
  • the safety valve and the pole should be installed on the same side surface of the lithium-ion battery case, but they can also be installed on different side surfaces as required.
  • safety valves and poles can be installed on any side surface of the lithium-ion power battery.
  • a large-capacity lithium-ion power battery can be installed with thousands of safety valves on the same side surface or on different side surfaces.
  • the medium for preparing the slurry includes NMP (N-fluorenyl-2-pyrrolidone) as the medium or water as the medium; the preparation methods include the wet method and the dry method.
  • NMP N-fluorenyl-2-pyrrolidone
  • the preparation methods include the wet method and the dry method.
  • the NMP medium is described first, and then the water medium is described.
  • the wet method is first described (there are also wet methods: sequential preparation method and mixed preparation method), and then the dry method is described. (Positive). It is described below:
  • NM P positive electrode.
  • P V D F, graphite (or acetylene black), and carbon black all need to be baked in an oven at about 120 ° C for about 2 to 3 hours.
  • Sequential preparation method After adding PVDF to NMP and stirring for about 3 to 4 hours, add conductive agent graphite (or acetylene black), carbon black and stir for about 0.5 to 1 hour, and finally add lithium cobaltate and stir for about 2.5 to 4 hours to become viscous. Pasty.
  • Sequential preparation method After adding CMC to water and stirring for about 3 to 4 hours, add SBR to it and stir for about 0.5 to 1 hour, then add conductive agent graphite (or acetylene black), carbon black and stir for about 0.5 to 1 hour, and finally add cobalt Lithium acid Mix for about 2.5 to 4 hours to form a thicker paste. Sieve out agglomerates and other impurities.
  • the preparation of the positive electrode must be slightly larger than the conductive agent.
  • N M P the medium.
  • P V D F should be baked in an oven at a temperature of about 120 ° C for 2 to 3 hours, while graphite needs to be baked at a temperature of 300 ° C to 500 ° C for 4 to 8 hours.
  • Sequential preparation method Add P V D F to N M P and stir for about 3 to 4 hours, then add the graphite that has been sifted through a 3 2 5 mesh sieve and shake it for about 3 to 4 hours to form a thick slurry.
  • Sequential preparation method Add CMC to water and stir for about 3 to 4 hours, then add SBR to it and stir for about 0.5 to 1 hour. Finally, add the graphite after baking and sieving through 300 mesh to stir for about 3 to 4 hours. Pasty.
  • Dry preparation Dry preparation of the positive electrode with N M P as the medium. Materials required: Materials required: P V D F 2.5% to 3.5%, lithium cobaltate 93% to 95%, conductive agent graphite 1.5% to 2 ° /. (Or acetylene black 0.8% ⁇ 1.
  • NM P is restricted by the particle size and particle size distribution of the foregoing substances, especially lithium cobaltate, so it is about the total amount of all the foregoing substances.
  • the particle size of the conductive agent must be equal to or smaller than the positive electrode material (lithium cobaltate, lithium manganate, lithium nickel cobaltate).
  • the active material used for the positive electrode of the lithium-ion power battery can also be lithium manganate, lithium nickelate, or lithium nickel cobaltate.
  • the preparation method is basically the same as the foregoing method using lithium cobaltate.
  • the particle size of the lithium ion battery positive electrode material can be selected in the range of 2 ⁇ m to 12 ⁇ m, but the optimal particle size should be 5 ⁇ m ⁇ 8 ⁇ m;
  • the particle size distribution of the cathode material must also be as narrow as possible. Taking 5 ⁇ m particle size as an example, too fine (less than 2 ⁇ ⁇ ) or too thick (more than 12 ⁇ m) powder The total is usually not more than 40%.
  • Cathode material lithium cobaltate, lithium manganate, lithium nickelate, or lithium nickel cobaltate
  • the preparation method in the range of m is the same except that the solid-liquid ratio is different.
  • the solid-liquid ratio of fine powders below 2 ⁇ m should be increased by 20% to 50% based on the original solid-liquid ratio, and the solid-liquid ratio of coarser powders above 12 ⁇ m should be based on the original solid-liquid ratio. Up to 10% ⁇ 30%.
  • the anode material graphite is screened by 300 mesh vibration, and the remaining ones on the Internet are usually not suitable for use.
  • the conductive agent involved in the present invention includes graphite, acetylene black, carbon black, etc .; except that graphite is used as a negative electrode material for high-temperature treatment (300 ° C ⁇ 500 ° C), the rest are dried.
  • the baking material can be placed in a vacuum box for vacuum treatment, without the need for high temperature treatment.
  • the production process of lithium-ion power battery is as follows: ingredients- ⁇ coating- ⁇ production- ⁇ rolling- ⁇ winding and assembly into the inner body (including casing, sealing)- ⁇ injection- ⁇ chemical formation- ⁇ volume .
  • Coating also known as drawing pulp.
  • the stirred positive electrode (or negative electrode) slurry is hook-coated on the metal foil current collector, pulled out by a roller knife, and baked into the oven. After baking, it will become a semi-finished current collecting piece. Care must be taken during coating to avoid scratches, exposed substrates, lightness and weight in the vertical and horizontal directions.
  • the temperature control is very important: the temperature of the preheating section should not be too high, usually the temperature is selected at 90 ° C or below, and the temperature of the intermediate temperature section is between 1 10 ° C ⁇ 1 3 0 ° Between C, ⁇ 1 0 ° C, the temperature in the high temperature section is 1 2 0 ° C ⁇ 1 40 ° C, ⁇ 10 ° C.
  • the temperature of the negative electrode slurry can be slightly higher than the temperature of the positive electrode slurry by about 10 to 15 ° C during coating and baking, and the temperature of the slurry using water as a medium can be higher than that of NMP as a medium.
  • the temperature of the slurry is slightly higher than about 10 ⁇ 15 ° C.
  • both the positive electrode and the negative electrode must enter the drying tunnel of the coating machine (also known as the puller) from the preheating section, and must not be inverted. If the slurry (especially the negative electrode slurry) first enters the high-temperature area of the coater and bakes suddenly at high temperature, the surface is dried quickly, and it is easy to form a dry shell, which is slightly wrinkled, which will form cracked fine lines. The slurry under the dry shell is sugar-smeared and forms a liquid film invisible to the naked eye between the metal foil.
  • the coating machine also known as the puller
  • the slurry is actually virtually attached to the surface of the metal foil, so it is easy to remove powder and even flakes ( (Ie, large pieces of active material fall off the metal foil), which seriously affects the electrical performance of lithium-ion power batteries.
  • Most of the current coating processes are single-sided coating, and then the other side is coated; however, double-sided coating can also be applied at the same time.
  • the positive and negative electrode sheets to which the present invention is applied may be coated with active materials on both sides of the metal foil, or may be coated with active materials only on one side of the metal foil.
  • pole pieces of the same polarity negative electrode and negative electrode, positive electrode and positive electrode
  • the back surface metallic surface without active material coating
  • the thickness of the metal foil used for single-sided coating must be thinner than the thickness of the aforementioned metal foil, which is about 1/2 to 1/3 of the thickness of the aforementioned metal foil.
  • Line speed control in the coating process is also important. Under the above temperature conditions, the linear speed can be adjusted within the range of 800mm ⁇ 5000mm per minute. The best linear speed is 1200mm ⁇ 35 00mm per minute.
  • high-pressure spraying can also be used. Under a certain pressure of the dry protective gas, the slurry is sprayed evenly on the metal foil from the high-speed nozzle, which not only has better adhesion, but also significantly increases the production capacity.
  • the thickness of the positive electrode before rolling is about 170 ⁇ ⁇ to 270 ⁇ m, and the thickness of the positive electrode after rolling is about 110 ⁇ ⁇ to 165 ⁇ ⁇ ; the thickness of the negative electrode before rolling is about 185 ⁇ m to 275 ⁇ m , 110 ⁇ ⁇ ⁇ 165 ⁇ ⁇ after rolling.
  • the optimal thickness of the positive electrode before rolling is 195 ⁇ ⁇ ⁇ 235 ⁇ ⁇ , and the optimal thickness of the positive electrode after rolling is 135 ⁇ ⁇ ⁇ 155 ⁇ m; the optimal thickness of the negative electrode before rolling is 220 ⁇ ⁇ ⁇ 250 ⁇ ⁇ , The optimal thickness after rolling is 135 ⁇ ⁇ ⁇ 155 ⁇ ⁇ .
  • Battery assembly When assembling, first put the positive electrode sheet into the clip of the bag-shaped separator 19 or the book-shaped separator 19-1, and then arrange the positive electrode tabs in parallel to one end of the inner body 7 and clamp it with a current collector plywood The negative electrode tabs are arranged neatly in parallel to the other end of the inner body, and are also clamped with a current collecting plywood.
  • the positive electrode sheet 1 3 and the negative electrode sheet 12 must be stacked and spaced apart, that is, a negative electrode sheet is stacked, then a positive electrode sheet is stacked, then a negative electrode sheet is stacked, and so on.
  • both sides of the outermost layer of the inner body are usually negative plates.
  • both sides of the outermost layer of the inner body may also be positive electrode sheets.
  • the positive pole 4 is connected to the positive piece 1 3
  • the negative pole 2 is connected to the negative piece 1 2.
  • the assembled inner body must be tightly wrapped with a diaphragm or clamped with a polyethylene or polypropylene frame.
  • the inner body of the assembled state is excluded.
  • the thickness of the separator 19 is excluded.
  • the distance between the positive electrode and the negative electrode must not be greater than 25 ⁇ m (the maximum gap between the positive electrode and the negative electrode-the thickness of the separator + 2 5 ⁇ m).
  • the positive electrode pole 4 is connected to the positive electrode sheet 1 3, and the negative electrode pole 2 is connected to the negative electrode sheet 12.
  • the surface of the current collecting plywood in contact with the tabs is processed with raised spines.
  • the coverage of the current collector plywood should be larger than the large leaf tab.
  • the method of clamping is also divided into perforated clamps and two-sided clamps.
  • the integrated current collector ply is cut on a solid metal into several wire grooves that can be compressed and can be springed off.
  • the pole ears are inserted into the wire grooves of the current collector ply A or D and fastened with metal bolts 5.
  • the split-type current collecting plywood B or C is connected in series by a plurality of independent metal pieces through a series rod 20, and clamps the tabs respectively and fastens them with metal bolts 5.
  • the integrated current collector plywood can be perforated or double-sided.
  • the split current collector plywood can also be perforated or double-sided. From efficiency As far as the effect is concerned, the efficiency and effect of the perforated clip are better than the two-sided clip.
  • the bolts In order to prevent the bolts connecting the pole ears and poles from loosening, the bolts need to be fixed with curing glue.
  • Inject fluid Before injection, the normal air in the inner cavity of the lithium ion power battery must be drawn out. Except for the moisture in the inner cavity, the inner cavity of the battery must be in a negative pressure state, and then an appropriate amount of electrolyte is injected from the safety valve port.
  • the injection volume of a lithium-ion power battery must be calculated based on its capacity. If the injection volume is too large, it will easily leak and cause the drum shell. If the injection volume is too small, it will easily cause the deterioration of the positive and negative electrode active materials.
  • the injection volume of lithium ion power battery is usually adjusted in the range of 0.1 5 Ah / g ⁇ 0.6 Ah / g; the optimal injection volume is 0.2 Ah / g ⁇ 0.3 5 Ah / g between.
  • the environmental control of the injection is very important, so the injection must be completed in the operation box or other environment that can meet the requirements. Because the pressure relief hole of the safety valve communicates with the liquid injection hole on the cover plate, the injection liquid is usually injected from the pressure relief hole of the safety valve; the liquid injection hole can also be processed on the housing or the cover plate separately.
  • the internal cavity of the lithium-ion power battery must be intentionally filled with solid substances or electrolyte. Depending on the capacity of the lithium-ion power battery, the cavity is about 1% to 10% of the total volume of the internal cavity.
  • the cavity can be filled with a protective gas.
  • Formation is the last key to battery production.
  • the formation principle of high-power lithium-ion batteries must be low current and low voltage. High current must never be formed. Higher voltage formation can fully activate the active materials on the positive and negative current collector substrates.
  • the formation process must be completed uninterrupted at one time, and cannot be stopped or stopped at will.
  • the formation curve should be smoothly connected, and the current should be controlled between 0. 0 1 C / 10 hours- ⁇ 0. 2 C / 5 hours- ⁇ 0. 0 5 C / 5 hours- ⁇ 0. 1 C / 4 hours- ⁇ 0.2 C / 1 hour, after the constant current is full, it will be switched to constant pressure to continue charging, so as to ensure sufficient one time.

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Abstract

Cette invention se rapporte à une batterie aux ions de lithium rechargeable, dont chaque élément d'accumulateur individuel est constitué par une plaque de revêtement, un pôle négatif, une valve de sécurité, un pôle positif, une solution d'électrolyte et un boîtier. Le pôle positif est connecté à l'électrode positive et le pôle négatif est connecté à l'électrode négative. Le substrat de l'électrode positive est choisi sous la forme d'une feuille d'aluminium d'une certaine épaisseur, recouverte d'un matériau actif positif sur les deux côtés. Le substrat de l'électrode négative est choisi sous la forme d'une feuille de cuivre d'une certaine épaisseur, recouverte d'un matériau actif négatif sur les deux côtés. Cette batterie se caractérise en ce que son corps intérieur est constitué par un ensemble électrode ayant une structure stratifiée multicouche composée d'une ou de plusieurs paires d'électrodes, une électrode positive, une électrode négative et un séparateur, dans l'ensemble électrode, la feuille de l'électrode positive et la feuille de l'électrode négative étant disposées séparément en séquence. La feuille de l'électrode positive ou la feuille de l'électrode négative est conçue sous la forme d'une feuille rectangulaire avec une seule languette à grande feuille ou de multiples languettes à grande feuille, avec écoulements de courant jusqu'aux pôles, grâce à une pince collectrice de courant. L'électrode positive possède un ou plusieurs pôles d'électrode et l'électrode négative possède un ou plusieurs pôles d'électrode. L'intensité du pôle positif peut être identique à celle du pôle négatif ou différent et le diamètre des pôles peut être identique ou différent.
PCT/CN2003/000171 2002-03-08 2003-03-07 Batterie aux ions de lithium rechargeable et procede de fabrication correspondant Ceased WO2003077349A1 (fr)

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CN02107211.6 2002-03-08
CNB021072116A CN1320684C (zh) 2002-03-08 2002-03-08 可反复充放电的锂离子动力电池及其制造方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011031963A1 (fr) * 2009-09-10 2011-03-17 Johnson Controls Technology Company Batterie secondaire
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US9153802B2 (en) 2010-02-25 2015-10-06 Johnson Controls Technology Company Secondary battery
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CN109449322A (zh) * 2018-12-21 2019-03-08 河南鼎能电子科技有限公司 一种具有超薄金属外壳的新型锂电池
WO2020214387A1 (fr) * 2019-04-15 2020-10-22 Robert Bosch Gmbh Bloc-batterie doté d'un système de gestion de pression comprenant un dispositif de compensation
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WO2025001892A1 (fr) * 2023-06-29 2025-01-02 东莞新能源科技有限公司 Ensemble électrode, dispositif électrochimique et dispositif électrique

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10261440A (ja) * 1997-03-19 1998-09-29 Hitachi Ltd リチウム二次電池とその製造方法および電池システム
JPH11154500A (ja) * 1997-11-21 1999-06-08 Japan Storage Battery Co Ltd 非水電解質二次電池
JPH11162446A (ja) * 1997-11-26 1999-06-18 Yuasa Corp 単位電池とこれを用いた蓄電池装置
EP1102342A2 (fr) * 1999-11-17 2001-05-23 Shin-Kobe Electric Machinery Co. Ltd Batterie cylindrique aux ions lithium
CN2433737Y (zh) * 2000-06-15 2001-06-06 华南理工大学 锂离子动力电池
CN2457746Y (zh) * 2000-12-13 2001-10-31 天津和平海湾电源集团有限公司 方型金属壳密封蓄电池

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999033135A1 (fr) * 1997-12-22 1999-07-01 Mitsubishi Denki Kabushiki Kaisha Fabrication d'un accumulateur electrique aux ions lithium
KR100675700B1 (ko) * 1999-08-10 2007-02-01 산요덴키가부시키가이샤 비수 전해액 이차 전지 및 그 제조 방법

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10261440A (ja) * 1997-03-19 1998-09-29 Hitachi Ltd リチウム二次電池とその製造方法および電池システム
JPH11154500A (ja) * 1997-11-21 1999-06-08 Japan Storage Battery Co Ltd 非水電解質二次電池
JPH11162446A (ja) * 1997-11-26 1999-06-18 Yuasa Corp 単位電池とこれを用いた蓄電池装置
EP1102342A2 (fr) * 1999-11-17 2001-05-23 Shin-Kobe Electric Machinery Co. Ltd Batterie cylindrique aux ions lithium
CN2433737Y (zh) * 2000-06-15 2001-06-06 华南理工大学 锂离子动力电池
CN2457746Y (zh) * 2000-12-13 2001-10-31 天津和平海湾电源集团有限公司 方型金属壳密封蓄电池

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011031963A1 (fr) * 2009-09-10 2011-03-17 Johnson Controls Technology Company Batterie secondaire
US10355264B2 (en) 2009-09-10 2019-07-16 Cps Technology Holdings Llc Secondary battery
US9153802B2 (en) 2010-02-25 2015-10-06 Johnson Controls Technology Company Secondary battery
WO2014037169A1 (fr) * 2012-09-05 2014-03-13 Robert Bosch Gmbh Cellule de stockage d'énergie électrique et procédé de production d'une cellule de stockage d'énergie électrique
CN104584275A (zh) * 2012-09-05 2015-04-29 罗伯特·博世有限公司 电能存储电池以及用于制造电能存储电池的方法
CN103730255A (zh) * 2013-12-26 2014-04-16 宁波海融电器有限公司 一种防泄漏电容器
CN106803563A (zh) * 2017-03-16 2017-06-06 华霆（合肥）动力技术有限公司 电池模组及焊接系统
CN108039427B (zh) * 2017-12-29 2023-12-22 上海奥威科技开发有限公司 一种装配简易的两头出方壳装置及其装配方法
CN108039427A (zh) * 2017-12-29 2018-05-15 上海奥威科技开发有限公司 一种装配简易的两头出方壳装置及其装配方法
CN109449322A (zh) * 2018-12-21 2019-03-08 河南鼎能电子科技有限公司 一种具有超薄金属外壳的新型锂电池
WO2020214387A1 (fr) * 2019-04-15 2020-10-22 Robert Bosch Gmbh Bloc-batterie doté d'un système de gestion de pression comprenant un dispositif de compensation
WO2020214386A1 (fr) * 2019-04-15 2020-10-22 Robert Bosch Gmbh Bloc-batterie doté d'un système de gestion de pression
US12142784B2 (en) 2019-04-15 2024-11-12 Robert Bosch Llc Battery pack with a pressure management system including a compensating device
US12381295B2 (en) 2019-04-15 2025-08-05 Robert Bosch Llc Battery pack with a pressure management system
CN112290169A (zh) * 2020-03-31 2021-01-29 蜂巢能源科技有限公司 锂离子电池注液装置及注液方法
CN116100256A (zh) * 2023-02-02 2023-05-12 马鞍山纳百川热交换器有限公司 基于ccd视觉定位的动力电池热交换器原材料切割方法
WO2025001892A1 (fr) * 2023-06-29 2025-01-02 东莞新能源科技有限公司 Ensemble électrode, dispositif électrochimique et dispositif électrique

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