摘要:
In a non-aqueous electrolyte secondary battery provided with a positive electrode 1, a negative electrode 2, and a non-aqueous electrolyte solution, a lithium-containing composite nickel oxide is used as a chief component of the positive electrode material for the positive electrode, a lithium-containing titanium oxide is used as a chief component of the negative electrode material for the negative electrode, and the solvent of the non-aqueous electrolyte solution contains a cyclic carbonic ester and a chain carbonic ester in such a manner that the cyclic carbonic ester and chain carbonic ester are contained in amounts of not less than 10% by volume of the whole solvent, respectively, and the total content of the cyclic carbonic ester and the chain carbonic ester is not less than 60% by volume of the whole solvent.
摘要:
The opening to be sealed in a battery is sealed with an electrical insulating sealant S by placing an electrical insulating sealing material C, including a first sealing material A that is soften by heat applied for sealing and a second sealing material B that is more difficult to soften by the heat applied for sealing than the first sealing material A, and by heating and successively cooling the electrical insulating sealing material C. The second sealing material B is in the form of a mesh. Thus, a sealed battery with few defectives such as a sealing failure and a short-circuit can be manufactured in a high yield rate.
摘要:
The present invention provides a lithium secondary battery using, as a lithium ion occluding agent for a negative electrode, a substantially amorphous oxide powder in which a product V·d of a total volume V in cm3/g of pores with a diameter of 100 nm or less and a true density d in g/cm3 measured by a helium displacement method is 0.1 through 0.5. Thus, the lithium secondary battery can attain an excellent charge-discharge cycle characteristic.
摘要翻译:本发明提供一种锂二次电池,其使用作为负极的锂离子吸留剂的基本上无定形的氧化物粉末,其中总体积V的产物Vd为cm3 / g,直径为100nm以下的孔 并且通过氦置换法测量的以g / cm 3表示的真密度d为0.1至0.5。 因此,锂二次电池可以获得良好的充放电循环特性。
摘要:
Provided is a novel lithium secondary battery comprising a positive electrode comprising a compound capable of occluding and discharging lithium, a negative electrode composed mainly of a carbon material which comprises a graphite as an only or as a principal component, a separator between said positive electrode and said negative electrode; and an electrolyte solution of an electrolyte solute dissolved in a solvent comprising at least one specific cyclic compound. The lithium secondary battery has a large capacity, small self-discharge rate and excellent cycle characteristics and high charge-discharge efficiency.
摘要:
A non-aqueous secondary cell is provided which is repeatedly chargeable and dischargeable. This cell comprises, as main components thereof, a negative electrode, a positive electrode, and a separator disposed between the negative and positive electrode and impregnated with an electrolyte. The negative electrode has lithium or lithium alloy as the active material. The positive electrode has manganese dioxide as the active material and contains Li.sub.2 MnO.sub.3.
摘要:
The positive electrode substrate exposed portions or the negative electrode substrate exposed portions, or both, of an electrode assembly is split into two groups, and therebetween is disposed an intermediate member made of a resin material and holding one or more connecting conductive members. Collector members for the substrate exposed portions split into two groups is electrically joined by a resistance welding method to the substrate exposed portions split into two groups, together with the connecting conductive member(s) of the intermediate member. The resin material portion of the intermediate member protrudes, in the extension direction of the substrate exposed portions split into two groups, beyond the ends of the substrate exposed portions split into two groups and the ends of the collector member to a prismatic outer can. This structure enables enhanced resistance between the substrate exposed portions and the collector member and curbs variation in the welding strength.
摘要:
By combining crimping fixing and laser welding, a collector attached to a substrate of an electrode assembly is fixed to a terminal. A negative electrode terminal 19A has a terminal portion formed on one side of a flange portion, and a cylindrical crimping member 19b on the other side. The cylindrical crimping member 19b is inserted through openings formed in a first insulating member, a sealing plate, a second insulating member, and a negative electrode collector 18a. The cylindrical crimping member 19b is crimped in a diameter-increasing direction, and is mechanically fixed in a countersunk hole 18c of the negative electrode collector 18a. A peripheral portion of a thin-walled portion 19d having a thickness smaller than those of other portions formed at the tip end portion of the cylindrical crimping member 19b is thoroughly adhered and welded by a high energy beam to the edge of the countersunk hole 18c.
摘要:
The present invention aims to provide a method for insulatively covering the side surfaces and bottom of a prismatic outer can in a simple manner. This can be realized by adopting the following configuration: a prismatic cell including a prismatic outer can having an opening at the top thereof; a sealing body for sealing the opening; and positive and negative electrode external terminals that are protruded from and insulated from the sealing body, wherein the prismatic outer can is covered on the side surfaces and entire bottom with a piece of folded insulation sheet. Preferably, the bottom of the prismatic outer can is covered with only one piece of the insulating sheet, and all edges of the insulating sheet is positioned above the bottom of the outer can.
摘要:
A prismatic secondary battery is provided with a negative/positive electrode collector (18), which are disposed on either one of a wound negative/positive electrode substrate exposed portion (15), and a negative/positive electrode collector receiving member (19) which is disposed on another surface. At least one of the negative/positive electrode collector has a recess portion (30) formed in part on a surface on the side not facing the negative/positive electrode substrate exposed portions so as to be thinner than the thickness of the other portion. Resistance welding is carried out in this recessed part, thereby a large welding nugget is formed between the negative/positive electrode exposed portion and the negative/positive electrode collector.
摘要:
A prismatic secondary battery includes a wound electrode assembly, a bottomed prismatic hollow outer body having a mouth and storing the wound electrode assembly, and a sealing plate including a gas release valve and sealing up the mouth. The wound electrode assembly is disposed in the outer body so that the winding axis direction of the wound electrode assembly is parallel to the bottom face of the outer body. A high-melting-point material having a higher melting point than the melting point of a material, constituting the outer body is disposed between both ends of the wound electrode assembly in the winding axis direction and a lateral face of the outer body facing the end of the wound electrode assembly in the winding axis direction.