What are the potential safety hazard lithium battery?

Source: 2020 - 04 - 02 shine forth hits: 1 times the safety of lithium-ion batteries method. Security method 1: software BMS board maintenance, remote security monitoring the current domestic battery manufacturing level less than Japan and South Korea the consistency of the precision of the battery itself has certain security risks. If the only pure hardware BMS board maintenance, such electronic components likely to fail. Once the BMS failure, safety accidents will occur. The perfect solution is to participate in the remote data transmission module, data interconnection of key electrical components, complete vehicles including lithium battery charge and discharge data. Through headquarters data monitoring, forecast the battery failure mode, in advance to inform the user, provide rapid service, eliminate safety hidden trouble. 2. Safety method 2: improved structure, ensure the safety of the lithium battery compared with electric cars, electric bicycle lithium battery using the environment worse. Vehicle shock absorption function is poor; Riding a bicycle is chaos; Vehicles often placed in the outdoor, battery will directly exposed to the outside, the wind, rain, day. Haobo independently designed a completely sealed, breathable, monotonous waterproof structure, internal use high thermal conductivity silicone resin filling. In addition, the battery and BMS board are seismic grade, to further strengthen the function of waterproof and moistureproof. Together to achieve each battery temperature between target on both ends of the battery, ensure the consistency of the battery, and then walk the whole battery life. 3, safety method 3: two-way handshake confirmation circuit, ensure the battery don't mess with the electric bikes on the market basically is the output of straight-through, abuse of batteries provide convenience for the user. If the lithium-ion batteries used in lead-acid car, namely sell lithium lead; Or as a test drive treasure for lead-acid car test drive; Maintenance personnel also use lead-acid controller or charger to replace defective lithium electric car controller and charger. These are lead-acid battery era legacy of bad habits. Once the lithium battery is abused in lead-acid car, because there are a EABS reverse charge in the lead-acid controller, and do not agree with lithium battery under-voltage point, will cause potential safety hazard to the lithium battery. Perfect countermeasures is, BMS between controller and lithium battery, should increase before BMS and charger two-way handshake to identify the circuit, as long as they don't match each other, lithium battery can charge and discharge circuit, closed, are not allowed to break the law, illegal charger, controller discharge reducing lithium battery safety caused by external factors. 4. Lithium battery safety method 4: PGR motor to prevent EABS reverse charge the rechargeable lithium-ion batteries for lead-acid battery is a very good advantage, but for the lithium battery, it has become a safety hazard. Lithium battery charge against what's the harm? We have introduced the principle of lithium battery charging, lithium ion to escape from the positive, through membrane and the electrolyte into the porous graphite anode. Assuming that lithium ions move fast enough, mobile number too much, will be on the surface of the negative that lithium dendrite, accumulated to a certain degree will explode the membrane short circuit. The rechargeable lithium ion in the process of the influence of the number and speed of the mobile elements, first is the environment temperature and the charging current. Although the function of the lithium electric car has eliminated the EABS, but will still exist in the process of slope sliding and trudge reverse charging current: hub direct-drive motor at low speed in the existing lithium is widely used in the operation of the electric bicycle. The motor is a motor in the process of mountaineering, high-speed taxi on slopes become a generator. When the motor speed over additional rotational speed, reverse charging the electromotive force of the voltage will be higher than the battery voltage, power back to the battery, the faster the vehicle drop, induction to the greater the back emf, that is to say, the reverse the greater the current when charging.