Abstract: The present application provides an electrolyte for lithium ion battery which comprising a mixture of organic solvents consisting of ethylene carbonate, ethyl methyl carbonate, dimethyl carbonate and carboxylate ester, wherein a mass ratio of ethylene carbonate, ethyl methyl carbonate, dimethyl carbonate and carboxylate ester is (20%-30%):(45%-55%):(10%-20%):(5%-15%); a mixture of additives consisting of vinylene carbonate, propane sultone, fluorinated ethylene carbonate and perfluorohexylsulfonyl fluoride; and a lithium salt. The electrolyte for lithium ion battery provided according to the present application has good wettability and high absorption rate. The present application also provides a lithium ion battery with high energy density, small internal resistance, good cycle performance and good charge and discharge performance.

Abstract: The present invention provides a steering wheel including a main body and a vehicle speed control module positioned on the main body. The vehicle speed control module includes a stator, a rotor coaxial to the stator and rotatable relative to the stator, and a first contact lever positioned on the rotor. The rotor includes a Hall element configured to detect a rotational position of the rotor, and generate a Hall signal according to the rotational position of the rotor. When the first contact lever is rotated in a counterclockwise direction relative to a first initial position, the rotor is driven by the first contact lever to rotate, the Hall element outputs a first Hall signal to a controller of a motor vehicle, and the controller controls the motor vehicle to move forward. The present invention further provides a motor vehicle having the steering wheel.

Abstract: A large capacity lithium-ion-battery pack includes an dielectric housing having receiving barrels; single lithium ion batteries each received in a receiving barrel and comprises an anode currency collector and a cathode currency collector; a dielectric cover member assembled to the housing; and a conductive connecting assembly. The conductive connecting assembly includes a number of upper contact plates embedded in the cover member and a number of lower contact plates embedded in the housing. A part of each upper contact plate protrude out of the cover member for electrically contacting the anode currency collector or the cathode currency collector of a single lithium battery, a part of each lower contact plate protrude out of the housing for electrically contacting the anode currency collector or the cathode currency of a corresponding single lithium battery, all of the single lithium ion batteries are in a series-parallel connection state through the conductive connecting assembly.

Abstract: A lithium iron phosphate power battery includes: a battery case; a battery cell in the battery case, including: a positive plate including a positive current collector and a positive active material formed thereon, the positive active material including lithium iron phosphate having a primary particle diameter of no more than 200 nm and a D50 of no more than 3 ?m, a mass content of the lithium iron phosphate in the positive active material being 93-96%, a solid content of the positive active material being 50-65%; a negative plate including a negative current collector and a negative active material formed thereon, the negative active material including a graphite having a D50 of 10-15 ?m, a mass content of the graphite in the negative active material being 92-95%, a solid content of the negative active material being 50-65%; a separator between the positive plate and the negative plate; and an electrolyte.

Abstract: A powertrain system includes an electric generator, a compressor, a water cooling module including a water pump, an electronic fan, a steering pump, a pneumatic module including an air pump, a transmission device, and an electric motor. The electric motor is configured to drive the electric generator, the compressor, the water pump, the electronic fan, the steering pump, and the air pump to work through the transmission device. The present invention further provides an electric vehicle with the powertrain system.

Abstract: A power battery system includes a number of parallel groups that being connected in series and a number of improved electrode boards. Each of the parallel groups comprising a number of single batteries connected in parallel. Each of the improved electrode boards being connected between two neighbored parallel groups. Each of the improved electrode boards includes a number of electrode contact plate, a conductive substrate, and a number of security devices. Each electrode contact plate connects two neighbored single batteries of two neighbored parallel groups in series. Each of the security devices corresponds to an electrode connection plate and electrically connects an electrode connection plate to the conductive substrate. Each of the security devices fuses when one of the single batteries of a parallel group occurs short circuit.

Abstract: A cap assembly (100, 200) for a lithium ion secondary battery (1000, 2000). The cap assembly includes a cap plate (30, 97), a leakproof film (20, 98), and a cap cover (10, 99). The cap plate (30, 97) includes a supporting portion (31, 971) and a safety film (32, 972). The safety film is positioned in the supporting portion (31, 971). The safety film (32, 972) defines safety grooves (33, 973). The safety film (32, 972) is capable of break down along the safety grooves (33, 973). The leakproof film (20, 98) is attached on the supporting portion (31, 971). The leakproof film (20, 98) is made of a material with high temperature resistance and elasticity properties. The cap cover (10, 99) is attached on the leakproof film (20, 98).