55results about How to "Improve Laser Welding Performance" patented technology

A laser weldable PBT-series resin composition and a molded product thereof are provided, in which the composition is weldable uniformly and has high welding strength even when the composition comprises a polybutylene terephthalate (PBT) as a base. The laser weldable resin composition comprises 1 to 50 parts by weight of (B) an elastomer (such as a polystyrene-series thermoplastic elastomer or a polyester-series thermoplastic elastomer), 5 to 100 parts by weight of (C) a polycarbonate-series resin, 1 to 10 parts by weight of (D) a plasticizer (e.g., an aromatic polycarboxylic acid ester, and an acrylic plasticizer), and 0 to 100 parts by weight of (E) a filler or reinforcing agent (such as a glass fiber), relative to 100 parts by weight of (A) a polybutylene terephthalate-series resin (a homopolyester or a copolyester). The molded product prepared from the resin composition has a small light transmittance fluctuation range depending on sites to be irradiated of the molded product. Thus, the molded product can be bonded to a counter part article uniformly by a laser welding.

The invention discloses an aluminum alloy strip for an integrated battery cover plate and a preparing method of the aluminum alloy strip. The aluminum alloy strip comprises components including 1.2%-1.5% of Fe, 0.25%-0.5% of Mn, 0.05%-0.2% of Si, 0.005%-0.1% of Ti, smaller than or equal to 0.05% of Cu, smaller than or equal to 0.05% of Mg, smaller than or equal to 0.05% of Zn and the balance aluminum and inevitable impurities. Through component design and technology control, the characteristics that when an Al-Fe-Mn alloy is machined to a certain degree, softening happens, and a high laser absorbing rate and a low heat conductivity coefficient are achieved are utilized, during downstream manufacturing, the battery cover plate and an anti-explosion port are directly integrally punched and formed, annealing and welding are avoided, an anti-explosion sheet is uniform in thickness and stable in performance, the anti-explosion sheet and cover plate welding procedure and leakage, instable detonation pressure and other hidden danger caused by welding are reduced, and the preparing method of the aluminum alloy strip for the battery cover plate is novel.

A polyphenylene sulfide resin composition which comprises 100 parts by weight of a polyphenylene sulfide resin (A) and, compounded therewith, 1 to 100 parts by weight of glass fibers (B) having a single-fiber diameter of 12 μm or lager and has a crystallization temperature during cooling of 205° C. or lower. Also provided is a polyphenylene sulfide resin composition which comprises 100 parts by weight of a polyphenylene sulfide resin (A) and, compounded therewith, 1 to 100 parts by weight of glass fibers (B) having a single-fiber diameter of 10 to 12 μm, excluding 12 μm, has a crystallization temperature during cooling of 205° C. or lower and a chloroform-extractable content of 0.5 wt. % or lower, and gives a 2 mm-thick molded product which has a transmittance of 15% or higher for laser beam having a wavelength of 940 nm and a heat distortion temperature of 230° C. or higher under a load of 1.82 MPa.

A cell assembly (20) is formed by arranging an electrode body and electrolyte in an external case (12) having a through hole (41). A laser is applied to an annular portion (formed by Al or Al-based alloy) surrounding an opening end (41A) of the through hole (41) toward outside the case so as to form a welded base (45). A sealing film (54) is welded to the surface of the welded base directly or via a base film (52) welded in advance, so as to temporarily seal the through hole (41). The cell assembly (20) in the temporarily sealed state is subjected to initial charge and then a hole is opened through the film (54) so as to form a gas discharge passage for communication between inside and outside of the case (12), thereby discharging an excessive gas from the case (12) outside.

Provided is a 3000 series aluminium alloy plate which exhibits heat-dissipation characteristics applicable to large lithium ion battery containers, and which also exhibits excellent moulding properties, shape fixability, and laser welding properties. This aluminium alloy plate is a cold-rolled annealed material which has: a component composition including over 0.2 mass% but less than 1.4 mass% of Fe, 0.5-2.0 mass% of Mn, over 0.2 mass% but not more than 1.1 mass% of Si, 0.05-1.0 mass% of Cu, and less than 0.05 mass% of Mg, the remainder comprising Al and impurities; a conductivity of over 45% IACS; a metallographic structure in which the number of second phase particles having an equivalent circular diameter of at least 2 µm is less than 1800/mm2; a 0.2% proof stress of at least 30 MPa but less than 85 MPa; and an elongation value of at least 10%. Otherwise, this aluminium alloy plate is a cold-rolled material which has: a conductivity of over 45% IACS; a metallographic structure in which the number of second phase particles having an equivalent circular diameter of at least 2 µm is less than 1800/mm2; a 0.2% proof stress of at least 90 MPa but less than 180 MPa; and an elongation value of at least 3%.

The invention discloses a new energy power battery shell and cover aluminum alloy material preparing method, and relates to the technical field of new energy batteries. The method comprises the firststep of smelting, the second step of refining, drossing and online gas removal, the third step of semicontinuous casting, the fourth step of saw cutting, face milling and homogenizing, the fifth stepof rolling, the sixth step of annealing and the seventh step of cleaning, finishing and straightening. A new energy power battery shell and cover aluminum alloy is excellent in comprehensive performance; through integrity improvement and optimization on the aluminum alloy components and content and the preparing technology, the application performance of a prepared new energy power battery shell and cover product is obviously improved, substantive breakthrough is particularly achieved in the aspects of tensile strength, regulated non-proportion extension strength, percentage elongation after fracture, stability, punching performance and welding performance indexes, the application occasion and field are wide, and the active demand of the new energy market for high-performance power batterycover and shell products can be greatly met.

The invention relates to the field of automotive materials, in particular to a resin composition applicable to laser welding and with high metal texture and a preparation method thereof. The resin composition comprises, by weight, 100 parts of matrix resin, 0.05-5.0 parts of laser powder, 0.1-5.0 parts of metal pigment, 0.05-5.0 parts of pigment additive and 0.1-1.0 part of antioxidant. The preparation method includes: sufficiently mixing the matrix resin, the laser powder, the metal pigment, the pigment additive and the antioxidant in a low-speed mixer, feeding into a double-screw extruder through a metering device, performing screw conveying, shearing and mixing to allowing the materials to sufficiently melt and mix, and performing extrusion, drawing, cooling and grain-sized dicing to obtain the resin composition applicable to laser welding. The prepared resin composition with high metal texture can have excellent laser welding performance.

Provided is an aluminum alloy plate for a battery case which is excellent in moldability and laser weldability and shows little swelling deformation, even when temperature and pressure inside the case are increased after repetitive charging and discharging. The aluminum alloy plate is a plate material of an aluminum alloy comprising >1.0% and <1.5% Mn, >0.3% and <0.8% Mg, >0.3% and <0.6% Cu, 0.05-0.25% Si, 0.2-0.5% Fe and the balance being Al and impurities, wherein the relation: 3Cu(%) C22C 21/00 1 9 1 2003/10/17 1497051 2004/5/19 100500901 2009/6/17 2009/6/17 2009/6/17 Sumitomo Light Metal Industries, Co., Ltd. Japan Tanaka Hiroki Nagai Yasunori Ito Tomoyasu pan peikun jing zhiqiang 72003 Japan 2002/10/18 2002-303856 Japan 2003/7/15 2003-274451

The invention relates to a preparation method of a black flame-retardant PBT composite material capable of being welded by laser. The preparation method comprises the following steps: adding a raw material I into a main side feeding port of a double-screw extruder, adding a raw material II into a fourth section side feeding port of the double-screw extruder, extruding and granulating, controlling the rotating speed of a screw machine of the double-screw extruder to be 180-600 revolutions per minute and the extruding temperature of the double screws to be 235-275 DEG C, and preparing the black flame-retardant PBT composite material capable of being welded by laser; the length-diameter ratio of the twin-screw extruder is 40: 1; the raw material I is a mixture of 70-90 parts by mass of PBT resin A, 8-10 parts by mass of a flame retardant and 0.3-1.5 parts by mass of black powder, and the raw material II is a mixture of 10-20 parts by mass of PBT resin B and 0.2-3 parts by mass of potassium N-butylpiromate; the prepared black flame-retardant PBT composite material capable of being welded by laser has excellent laser welding capacity and good temperature resistance, is halogen-free and flame-retardant, meets the requirements of ROHS and Reach regulations, and can be used for producing black parts with flame-retardant requirements.

Provided is a 1000-series aluminum alloy plate which has high strength applicable to large-size lithium ion battery cases and also has excellent moldability and excellent laser weldability. An aluminum alloy plate produced from a DC cast slab. The aluminum alloy plate has such a chemical composition comprising 0.01 to 0.4 mass % of Si, 0.01 to 0.5 mass % of Fe, 0.002 to 0.3 mass % of Co and a remainder made up by Al and impurities, wherein the content of Cu, which is contained as an impurity, is limited to less than 0.2 mass %. The aluminum alloy plate has a metallic structure in which the number of second phase particles each having an equivalent circle diameter of 3 μm or more is 110 particles/mm² or more and less than 1000 particles/mm². A cold-rolled and annealed plate produced from the aluminum alloy plate has an elongation value of 30% or more.

The invention relates to a high-strength aluminum alloy used for a lithium ion battery shell and having excellent laser welding performance. The high-strength aluminum alloy comprises the components: 1.0-1.5 wt% of Mn, 0.2-1.0 wt% of Mg, 0.3-0.399 wt% of Cu, 0.251-0.4 wt% of Si, 0.2-0.6 wt% of Fe, less than 0.05 wt% of Ti, less than 0.005 wt% of B, and the balance Al and inevitable impurity elements, wherein Mn (wt%)+Mg (wt%)+Cu (wt%)>=1.8 wt%, and Mg (wt%)+Cu (wt%)+Si (wt%)<=1.4 wt%. Aluminum alloy sheet materials having the alloy components have excellent laser welding performance and good thinning-deep drawing formability, moreover, the tensile strength of an O-state sheet material is not less than 170 MPa, the tensile strength of an H1X-state sheet material is not less than 230 MPa, and the aluminum alloy sheet materials are suitable for manufacture of the lithium ion battery shell.

The invention discloses a polyamide composite material which comprises the following components in parts by weight: A) 20-80 parts of a compound of at least one polyamide E and at least one of polyamide I, polyamide II and polyamide III, wherein the content of amino terminal group in the polyamide E, the polyamide I, the polyamide II and the polyamide III is greater than the content of terminal carboxyl; and B) 0-35 parts of a filler. The polyamide composite material disclosed by the invention has the advantages of good laser welding effect and the like.

The invention discloses an aluminum alloy plate strip for a lithium battery cover plate and a preparation method of the aluminum alloy plate strip. The aluminum alloy plate strip comprises the following components of, in percentage by mass, 1.18 wt%-1.8 wt% of Fe, Mn less than or equal to 0.395 wt% 0.03 wt%-0.08 wt% of Ca, 0.1 wt%-0.3 wt% of Si and the balance Al and inevitable impurities, wherein Fe + Mn is less than 2 wt%, Fe/Mn is more than or equal to 2.5, Mn + Si is less than 0.6 wt%, and (Fe + Mn + Ca)/Si is more than or equal to 2.5. According to the aluminum alloy plate strip for the lithium battery cover plate and the preparation method of the aluminum alloy plate strip, the alloy has good mechanical performance, forming performance and laser welding performance at the same time, especially the performance stability of a material can be improved, and a prepared explosion-proof valve has stable explosion pressure.

The invention discloses an aluminum alloy material for new energy power battery shells and covers and application of the aluminum alloy material, and relates to the technical field of new energy batteries. The aluminum alloy material is composed of following element components including Si, Mg, Sr, Mn, Be, Zr, Sb, Er, Pr, Tb, Dy, B, Ga and Al. An aluminum alloy for the new energy power battery shells and covers is excellent in comprehensive performance; the components, content and preparation process of the aluminum alloy are overall improved and optimized, the application performance of prepared new energy power battery shell and cover products is improved remarkably, substantive breakthroughs are achieved especially on the index aspects of tensile strength, prescribed non-proportional extension strength, percentage elongation after fracture, stability, punching performance and welding performance, and the application occasion and field are wide; and the active demands of the new energy market for high-performance power battery cover and shell products can be greatly met.

The invention discloses a flame-retardant polyester composition which comprises the following components in parts by weight: 100 parts of polyester resin; 10 to 30 parts of an epoxy polymer; 10 to 45 parts of a flame retardant; and 10-500 ppm of tetrahydrofuran or derivatives thereof based on the total weight of the flame-retardant polyester composition. According to the flame-retardant polyester composition, the epoxy polymer and the tetrahydrofuran are compounded, so that the laser welding property of the flame-retardant polyester composition can be improved.

The invention discloses a preparation method of an aluminum alloy material for new energy power battery shells and covers, and relates to the technical field of new energy batteries. The preparation method comprises the following steps of 1) smelting; 2) refining, slagging off and online degassing; 3) semi-continuous casting; 4) sawing, milling and homogenizing; 5) rolling; 6) annealing; and 7) cleaning, finishing and straightening. The aluminum alloy for new energy power battery shells and covers has superior comprehensive performance. Through overall improvement and optimization of the aluminum alloy composition, content and preparation process, the application performance of produced new energy power battery shell and cover products is improved remarkably; substantive breakthrough is particularly achieved on the aspects of tensile strength, specified non-proportional extension strength, percentage elongation after fracture, stability, impact resistance and welding performance; the application occasion and field are wide; and the urgent demand of the new energy market for high-performance power battery cover and shell products can be met greatly.