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
  • H01M10/058—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
  • 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
  • H01M50/202—Casings or frames around the primary casing of a single cell or a single battery
• • 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
  • H01M10/42—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
  • 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
  • H01M50/147—Lids or covers
  • H01M50/148—Lids or covers characterised by their shape
  • H01M50/15—Lids or covers characterised by their shape for prismatic 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
  • 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
  • H01M50/147—Lids or covers
  • H01M50/155—Lids or covers characterised by the material
  • H01M50/16—Organic material
• • 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
  • H01M50/183—Sealing members
  • H01M50/184—Sealing members characterised by their shape or structure
• • 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
  • H01M50/183—Sealing members
  • H01M50/186—Sealing members characterised by the disposition of the sealing members
• • 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
  • H01M50/183—Sealing members
  • H01M50/19—Sealing members characterised by the material
  • H01M50/191—Inorganic material
• • 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
  • H01M50/247—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
• • 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
  • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. 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
  • 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
• • 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
• • 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
  • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
  • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
  • H01M50/627—Filling ports
  • H01M50/636—Closing or sealing filling ports, e.g. using lids
  • H01M50/645—Plugs
• • 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
• • 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

• This invention relates to relates to lithium secondary batteries. Particularly, it relates to enclosures for lithium ion secondary batteries.
• the lithium ion secondary battery has gradually been replacing traditional alkaline secondary batteries such as the nickel cadmium battery and the nickel hydrogen battery as it has a large specific energy, high working voltage, low self-discharging rate, long cycling life, and is non-polluting. It is widely used in modern mobile electronic and communications equipment, such as cell phones, notebook computers, portable computers, personal digital assistants (PDA), video cameras, digital cameras, portable DVD/VCD and MP3 players.
• PDA personal digital assistants
• the commercial lithium ion battery pack is comprised of a metal shell and cover holding the electrode core and electrolyte, as well as other accessories such as the protection circuit and a plastic outer shell. There are several disadvantages to this type of battery pack.
• An object or this invention is to provide lithium ion secondary batteries that are light with a high energy density.
• Another object of this invention is to provide lithium ion secondary batteries with a simple structure and are easy and inexpensive to manufacture.
• the present invention relates to lithium ion secondary batteries that have an enclosure with an electrode core compartment for holding the electrode core and a separate protection circuit compartment for holding the protection circuits, electrode core, protection circuits, electrolyte, and terminal leads connecting the electrodes in the electrode core with the circuits in the protection circuit.
• the enclosure is made of non ⁇ conducting material such as plastic.
• An advantage of this invention is that the lithium ion batteries that are embodiments of this invention have a simple structure, are easy and inexpensive to manufacture.
• Another advantage of this invention is that lithium ion batteries that are embodiments of this invention are light and have a high energy density. Description of Drawings
• Fig. 1 is a view of a lithium ion secondary battery that is an embodiment of this invention.
• FIG. 2 is a structural view of an enclosure of a lithium ion secondary battery that is an embodiment of this invention.
• FIG. 3 is a structural view of an electrode core of a lithium ion secondary battery that is an embodiment of this invention.
• FIG. 4(a) is a structural view of a cover of a lithium ion secondary battery that is an embodiment of this invention.
• Fig. 4(b) is structure view of another cover of a lithium ion secondary battery that is an embodiment of this invention.
• Fig. 5 is a diagram of a cross-section of an enclosure shell and cover of a lithium ion secondary battery that is an embodiment of this invention.
• (1) is the electrode core compartment
• (2) is the protection circuit compartment
• (3), (3') and (4), (4') are the terminal leads for the positive and negative electrodes
• (5) is the injection opening
• (6) is the cover for said electrode core compartment
• (7) is the cover for said protection circuit compartment
• (8) is the electrode core
• (9) is the protrusion of a cover
• (10) is the corresponding groove for the protrusion
• the presently preferred embodiments of the lithium ion secondary batteries of this invention include an enclosure that has a compartment (first compartment or protection circuit core compartment) for holding the protection circuit, another separate compartment (second compartment or electrode core compartment) for holding the electrode core, and the electrolyte.
• the enclosure may have one or more enclosure covers. These covers encase the enclosure and the compartments and, preferably, seal the compartments.
• the enclosure has two covers, one covers the electrode compartment (second cover) and another covers the protection circuit compartment (first cover).
• the materials for the enclosure can all be made of materials that are electrically non-conducting, such as plastic.
• the first, second, third and fourth conducting materials can be one or more materials selected from the following: polythene, polypropylene, polyetherimide, perfluoro alkoxy alkane, polyamide, and polycarbonate.
• the enclosure cover and the enclosure are mated and sealed by a groove and protrusion method. That is, the enclosure has grooves or protrusions while the enclosure cover has corresponding protrusions or grooves such that when the enclosure is covered by the enclosure cover, the protrusion or protrusions are inserted into said groove or grooves.
• the electrode core compartment and protection circuit compartment have separate second and first covers
• the second cover and the electrode core compartment are mated and sealed by a groove and protrusion method.
• the first cover and the protection circuit compartment are also mated and sealed by a groove and protrusion method.
• the electrode core compartment with its cover is completely sealed.
• the preferred welding methods include: ultrasonic welding and high frequency welding.
• the first compartment and its cover can be connected by many different means. Examples of the means for connections are: mechanical connection, welding, or gluing.
• the preferred methods are ultrasonic welding, high frequency welding, or using an adhesive.
• a pressure relief valve can be formed, either on the cover, or on one or more of the compartments.
• the protection circuits can include the protection circuit boards that are commonly used in lithium ion secondary batteries to prevent over-charging or over-discharging. It can also contain components to cut-off or switch the circuit to prevent overheating or high currents.
• the protection circuits are connected to the contact tabs for the positive and negative electrodes.
• Electrode cores can be used.
• One embodiment uses an electrode core fabricated by winding and stacking the positive electrode plate, separator membrane, and negative electrode plate in successive layers.
• the positive electrode and negative electrode plates connect to the positive tab and negative tab that can generate inductive currents respectively.
• the electrode core is electrically connected to the protection circuit.
• the positive and negative electrode tabs of the electrode cores are then electrically connected to the positive and negative electrode plates of the protection circuit by the terminal leads for the positive and negative electrodes.
• An injection hole (injection opening) for injecting the electrolyte can be located in the electrode core compartment or the cover for the compartment.
• the sealing for the injection hole can use the same sealing mechanism that is customarily used for metal enclosures.
• an injection opening sealer can be used.
• This injection sealer can be a metal rivet, metal bead or a non-conducting rivet such as a plastic rivet.
• the material for said non-conducting rivet can be one or more of the following non-conducting material: polythene, polypropylene, polyetherimide, perfluoro alkoxy alkane, polyamide, and polycarbonate.
• Embodiments of this invention with its non-conducting enclosure provide many advantages over the traditional enclosure that include both a metal shell and a plastic shell. It has a simple structure. This type of non-conducting enclosure replaces the metal shell and the supplementary features needed for the protection of electrode cores in traditional batteries. This significantly saves battery space and weight and increases the energy density of the batteries.
• the technology to fabricate the non-conducting enclosures of this invention is greatly simplified. Simple technology such as injection molding can be used to fabricate the non-conducting enclosure.
• processes needed for enclosures with metal components, such as canning, placing separation rings, and laser welding are no longer needed.
• the use of non-conducting enclosure also improves the safety of the battery. Additional features, such as the pressure relief safety feature can be added anywhere on the enclosure easily with little or no increase in costs. [32] In addition, these embodiments also reduce the number of welding spots needed for the battery. This lowers the internal resistance and improves the high current discharge performance of the battery. [33] The following further describe the fabrication method and structure of a preferred embodiment of this invention that is illustrated in Figures 1 through 5. [34] In this embodiment, the lithium ion electrode core (8) is fabricated by a conventional method of stacking the positive electrode plate, the separation membrane, and the negative electrode plate in successive layers. The lithium ion electrode core is then placed into the electrode core compartment of the enclosure with terminal leads for the positive and negative electrodes.
• the positive and negative electrode tabs (12) and (14) of electrode core (8) are then connected by welding to the terminal leads (3), (4) for the positive and negative electrodes in electrode core compartment (1).
• the electrode core compartment is then covered with the plastic cover (6) for the electrode core compartment with its protrusion (9) inserted into its corresponding groove (10) on said electrode core compartment.
• the electrode core compartment with its cover is completely sealed by ultrasonic welding. Electrolyte is injected through the injection hole or opening (5). After injection, a plastic rivet is used to seal the injection hole (5) to complete the assembly of the electrode core compartment.
• the contact pieces for the positive and negative electrodes of the protection circuit is connected to the conductive ends of the terminal leads (3'), (4') of the positive and negative electrodes in the protection circuit compartment (2) by welding.
• the protection circuit compartment (2) is then covered and welded to its plastic cover (7) to complete the assembly of the protection circuit compartment.
• the assembled lithium ion secondary battery as shown in Figure 1 is then ready for charging.
• the non-conductive center portion of the terminal lead can be of the same material as the compartments and it can be easily fused into place during the manufacturing process of the battery.
• the direct cut method is to directly precut slots between the compartments. Sealant is first added to the slot, the terminal lead is inserted into the pre-cut slot, and sealant again is added to the slot.
• the location of the pre-cut slot may be selectively designed.
• the terminal lead is a flat strip and the flat strip is placed in a pre-cut slot flat between the compartments.
• the terminal lead used in the preferred embodiments can be a conductive strip, a wire strand, or a solid wire.
• the terminal lead is a solid round wire stamped flat on both ends to provide contact surfaces.
• the round terminal lead can be put into place by either the pre-fabrication method or the direct cut method.
• One advantage of using a round solid wire is that it can maintain better seal in a vibration-prone environment.
• the terminal lead is not in a straight line connecting the two compartments. In one embodiment, it is placed in an "s" waveform manner. In yet another embodiment, it is placed in an "L” manner. In both cases, the seal can be better maintained than a straight line terminal lead placement.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Materials Engineering (AREA)
• Inorganic Chemistry (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Life Sciences & Earth Sciences (AREA)
• Computer Hardware Design (AREA)
• Biophysics (AREA)
• Secondary Cells (AREA)
• Connection Of Batteries Or Terminals (AREA)
• Sealing Battery Cases Or Jackets (AREA)
• Filling, Topping-Up Batteries (AREA)
• Steroid Compounds (AREA)
• Inorganic Compounds Of Heavy Metals (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

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• 2004
  • 2004-11-18 CN CNU2004200955584U patent/CN2772044Y/zh not_active Expired - Lifetime
• 2005
  • 2005-11-15 US US11/273,755 patent/US7851083B2/en active Active
  • 2005-11-16 AT AT05808323T patent/ATE437451T1/de not_active IP Right Cessation
  • 2005-11-16 KR KR1020077005703A patent/KR100864750B1/ko not_active Expired - Lifetime
  • 2005-11-16 DE DE602005015612T patent/DE602005015612D1/de not_active Expired - Lifetime
  • 2005-11-16 JP JP2007540478A patent/JP5073498B2/ja not_active Expired - Lifetime
  • 2005-11-16 EP EP05808323A patent/EP1812979B1/en not_active Expired - Lifetime
  • 2005-11-16 WO PCT/CN2005/001932 patent/WO2006053494A1/en not_active Ceased

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