Master-slave type whole vehicle electric energy management system and method and electric vehicle

The invention provides a master-slave type whole vehicle electric energy management system and method and an electric vehicle. The master-slave type whole vehicle electric energy management system comprises a master control module, a slave control module, a power battery, a low-voltage storage battery, a high-voltage load, a low-voltage load, a direct-current converter and a low-voltage load controller. The main control module obtains high-voltage use load power and a motion driving power request of the vehicle; the slave control module estimates the electric power of the low-voltage load and feeds back the estimation result and the state information of the low-voltage storage battery to the master control module; the main control module estimates the electric energy demand of the whole vehicle according to the electric power of the low-voltage load, the use power of the high-voltage load and the motion driving power request of the vehicle, and selects to carry out power limitation or closing ...

Electroplating blank surface treatment method of magnesium alloy rolling product

The invention discloses an electroplating blank surface treatment method of a magnesium alloy rolling product, comprising the following steps of: carrying out oil wax removal on the magnesium alloy rolling product; carrying out acidic activation treatment on the magnesium alloy rolling product subjected to oil wax removal by using an acid solution of ammonium bifluoride or acid solutions of sodium salts; carrying out alkaline activation treatment on the magnesium alloy rolling product by using alkaline activators of potassium pyrophosphate, sodium hydroxide and sodium citrate; carrying out acidic activation treatment on the magnesium alloy rolling product by using acid solutions of ammonium bifluoride, hydrofluoric acid and phosphoric acid; and carrying out neutralization treatment on themagnesium alloy rolling product by using neutralizing solutions of ammonium bifluoride and sodium hypophosphite. By adopting the method, bottom layer nickel or copper which has sufficient binding force ...

Method for processing surface of magnesium alloy

This invention discloses a surface treatment method for Mg-based material. The method comprises: (1) performing micro-arc oxidation treatment on Mg or Mg alloy work piece as the anode in a Cl--free alkaline micro-arc oxidation electrolyte; (2) activating; (3) performing preliminary chemical plating of Ni; (4) performing chemical plating of Ni; (5) performing thermal treatment. The micro-arc oxidation treatment comprises: (1) applying a positive pulse with an average current density of 5-20 A/dm2 until the voltage is automatically elevated to a critical value, and applying a constant working voltage of 50-80 V (total time = 5-30 min); (2) applying a positive pulse of 30-300 V and a negative pulse of 0-200 V with an average current density of 0.5-15 A/dm2 (total time = 10-60 min). The activation comprises: (1) performing anode alkaline coarsening treatment for 3-10 min; (2) performing surface activation treatment; (3) performing cathode alkaline electrification reduction activation treatment ...

Experimental apparatus for determining runway lawn protection-slope impact-proof performance

Intelligent charging method and system for low-voltage storage battery of vehicle

The invention discloses an intelligent charging method and system for a low-voltage storage battery of a vehicle. According to vehicle state information, whether the low-voltage storage battery of the vehicle is lack of electricity or not and whether the vehicle meets charging conditions of the low-voltage storage battery or not are determined; determining the in-out state of the vehicle; and when the low-voltage storage battery is lack of electricity and the vehicle meets the electricity supplementing condition, controlling a high-voltage system of the vehicle to directly supplement electricity to the low-voltage storage battery according to the in-out garage state of the vehicle, or sending electricity supplementing request information to a preset mobile terminal. Implementation scenes of automatic charging of the low-voltage storage battery of the vehicle are distinguished, the high-voltage system is directly controlled to automatically charge the low-voltage storage battery when the ...

Electroplating blank surface treatment method of magnesium alloy rolling product

The invention discloses an electroplating blank surface treatment method of a magnesium alloy rolling product, comprising the following steps of: carrying out oil wax removal on the magnesium alloy rolling product; carrying out acidic activation treatment on the magnesium alloy rolling product subjected to oil wax removal by using an acid solution of ammonium bifluoride or acid solutions of sodium salts; carrying out alkaline activation treatment on the magnesium alloy rolling product by using alkaline activators of potassium pyrophosphate, sodium hydroxide and sodium citrate; carrying out acidic activation treatment on the magnesium alloy rolling product by using acid solutions of ammonium bifluoride, hydrofluoric acid and phosphoric acid; and carrying out neutralization treatment on the magnesium alloy rolling product by using neutralizing solutions of ammonium bifluoride and sodium hypophosphite. By adopting the method, bottom layer nickel or copper which has sufficient binding force ...

Method for processing surface of magnesium alloy

This invention discloses a surface treatment method for Mg-based material. The method comprises: (1) performing micro-arc oxidation treatment on Mg or Mg alloy work piece as the anode in a Cl--free alkaline micro-arc oxidation electrolyte; (2) activating; (3) performing preliminary chemical plating of Ni; (4) performing chemical plating of Ni; (5) performing thermal treatment. The micro-arc oxidation treatment comprises: (1) applying a positive pulse with an average current density of 5-20 A/dm2 until the voltage is automatically elevated to a critical value, and applying a constant working voltage of 50-80 V (total time = 5-30 min); (2) applying a positive pulse of 30-300 V and a negative pulse of 0-200 V with an average current density of 0.5-15 A/dm2 (total time = 10-60 min). The activation comprises: (1) performing anode alkaline coarsening treatment for 3-10 min; (2) performing surface activation treatment; (3) performing cathode alkaline electrification reduction activation treatment ...

Torque distribution method, device and equipment for double-electric-drive-axle automobile and readable storage medium

The invention provides a double-electric-drive-axle automobile torque distribution method, device and equipment and a readable storage medium. The method comprises the steps that the driving state of the automobile is determined based on the absolute value of the rotating speed difference value between an intermediate axle motor and a rear axle motor, a constant speed cruise switching signal, the absolute value of the first wheel speed difference value between front wheels and the absolute value of the second wheel speed difference value between rear wheels; comparing the judgment factor corresponding to the driving state with a threshold value corresponding to the driving state to obtain a comparison result; and distributing the torque of the middle axle motor and the torque of the rear axle motor based on a torque distribution strategy corresponding to the comparison result. According to the method, the driving state of the automobile is determined firstly, then the torque of the middle ...

Method for determining runway lawn slope impact-resistance

A method for determining washout-resisting ability of turf slope protection on river channel includes preparing vegetative cover model, erecting and debugging determination device, washing out vegetative cover model, applying washout water stream in simulating to actual water flow-speed in river channel to wash out vegetative cover mode to obtain shearing stress valve when turf slope protection isdamaged.