Lithium battery electric bicycle knowledge popularization

Source: 2020 - 04 - 11 when hits: lithium battery electric bicycle knowledge popularization, the classification of electric bicycle 1. , depending on the type of battery electric bicycle can be divided into lead-acid battery electric bicycle and lithium ion battery electric bicycle. 2. Electric bicycle in driving way generally divided into wheel drive and the drive ( The central motor) Can be divided into the rear wheel drive, wheel drive and front-wheel drive. 3, batteries, placed balance and convenient place in the framework of the vehicle inclined tube or straight. Form a complete set of batteries at present basically economical lead-acid batteries. As for the size of the battery, the basic use of 48 v / 12 ah, 36 v / 10 - 24 v / 12 ah, 8 ah electric bicycle. Second, the electric bicycle type 1, a simple type: according to gb17761 - 1999 electric bikes general technical conditions, the electric bicycle ( FIG. 1) Usually in the motor power of 150 w - 180 w, especially shape is smooth, in 40 - the range of travel 50 kilometers, convenient operation, moderate price, more suitable for a long commuting distance, work and life have a certain number of mobile users. 2, the electric bicycle ( FIG. 2) General is in the simple increase fork device such as shock absorber, shock absorber, headlamps buffer, on the basis of its characteristics is the function is all ready, ride more comfortable, more convenient to use. 18650 strong light flashlight troubleshooting examples at present, various types of strong light flashlight has been widely used. One of the most popular is 18650 3. 7 v lithium ion battery, can be recharged by flashlight, its price is moderate, light stability, the light is simple, and most has the strong light, weak light, exposure, and other functions, a charge can use dozens of hours. By type 18650 torch lights, batteries, lamp, lamp back cover ( Switch) And the control circuit. I repair a lot of bright light hand lamp fault cases, has carried on the summary, the maintenance personnel for reference. 18650 lithium batteries and flashlights button ( Switch) Does not respond, the light is not bright: analysis and maintenance of control circuit, the wick and other abnormal failure phenomena are analyzed. First, turn on the lights, check the battery voltage is 3. 9v。 The battery voltage in the normal range. Then remove the wicking measurement, give the wick ( Not more than 3 v, otherwise it will burn out the wick) , the author is to use multimeter diode block to the wick, electric, wick can light up, the wick is normal. Only the back cover and control part, remove the lamp cover, wire connect the battery positive electrode directly with strong light shell, lit the lampwick, part of the normal control. On the back cover of this question should appear in the chimney, carefully check the rear cover of the lampshade, found the switch contact on the chimney has deformation, bad contact, with a long nose pliers correction, the light back to normal. After prolonged use, the lights went out and maintenance: according to the maintenance inspection, found that the wick heat dissipation is not good, long luminous overheating, lead to core needle closed, but not from the bonding pad, with a heat gun to blow down, and then in the wick daub thermal conductive silicone, its purpose is to pass the heat generated by the core, so core welding to return to its original position, have been used for more than three hours, and no longer wick, troubleshooting. Light only emit light of very weak, and should not be a flash to measure the battery voltage is within the normal range, control circuit has a problem. Remove the control chip, and the power supply. The output voltage is only 2. 4v。 Online shopping a driver or a control circuit board ( Including the postage) 'll buy a new flashlight to 20 yuan, 50 yuan, feel some not worth it. Think carefully, and the role of the control circuit: one is to prevent the battery voltage is too high, the breakdown the wick, complete the wick constant current power supply; Second, when the battery voltage is reduced to a certain extent, to cut off the output, the wick is no longer the power supply, in order to protect the 18650 battery is not affected by the output voltage is too high. Three is to complete light switch, weak light switch, emergency switch, and other functions.