Battery, motor and electronic control technology are the core technologies of electric vehicles. Because the use of these three technologies is required for every electric vehicle and directly affects the cruising range and acceleration time of the vehicle. Among them, the most important function in electronic control is the battery management system (BMS). Three-electric technology on electric vehicles: battery, motor, and electronic control technology are the core technologies of electric vehicles. Because the use of these three technologies is required for every electric vehicle and directly affects the cruising range and acceleration time of the vehicle. These three technologies are the wooden barrels that make up the electric car. Any one of them has a short board, which will directly affect the performance of the vehicle. The effects of batteries and motors on the performance of electric vehicles in the three-electric technology are more obvious. For example, the power level of the motor directly affects the power performance of the vehicle, and the energy storage of the pure electric vehicle battery is closely related to the cruising range of the vehicle. But what is the specific technical application in the electric vehicle for the electronic control technology in the three-electric system? Why do you think about the battery and the motor and have a place in the three-electric system? The most important function in electronic control is the battery management system (BMS). If there is no such system, the charging, discharging and service life of the power battery will be greatly reduced. If the battery is compared to a team of soldiers, the BMS system is the staff and generals of this group of soldiers, so that the electric vehicle can achieve twice the result with half the effort in practical applications. effect. If you want to understand the "general" on the electric car, you should first start with the soldiers below. The BMS system is mainly applied to secondary batteries, especially for the current mainstream electric new energy vehicles using lithium ion batteries. Regardless of which lithium-ion battery is used in the vehicle, the power battery is composed of a small battery cell in a series or parallel manner to form a battery pack, and then the battery pack finally constitutes a power battery unit of the vehicle. In the battery pack, the real energy storage function is every small battery cell in the battery pack, such as the 18650 lithium-ion battery used by Tesla. In fact, the figure represents that each battery cell has a diameter of 18mm and a length. It is 65mm. And an 85kW? The battery pack of the h version of the Tesla Model S consists of nearly 7,000 18650 lithium batteries. There are so many battery cells in a car, and each small battery cell is manufactured separately. Because of the electrochemical characteristics of the battery, there is a difference in the consistency of energy storage between each battery. problem. When charging, it is charging a car from a charging port. How to ensure that each battery is fully charged without causing damage to the battery due to overcharging is one of the problems that the BMS system has to solve. Usually, the BMS system has to determine how to manage the battery pack through two parts, that is, the detection module and the ortho-acid control module. Tesla's battery management module The implementation of the detection module is relatively simple, mainly by collecting the parameter information of the battery during use, such as temperature, elegance of each battery cell, current, elegance of the battery pack, current, and the like. These data play a vital role in the management of the battery packs. It can be said that without the data of these battery states as a support, the system management of the battery cannot be discussed. Based on the collected data, the BMS system will allocate how to charge the battery according to the actual situation of each battery cell, and which battery cell is full can stop charging it. In the process of use, the state of each battery is determined by state estimation, and the SOC (State Of Charge), SOP (State Of Power), SOH (State of Health), and equalization and thermal management are implemented. Reasonable use of batteries. Observing the law When the communication interruption or control abnormality occurs in the system, observe whether each module of the system has an alarm, whether there is an alarm icon on the display screen, and then check the obtained phenomenon one by one. The fault recurrence method has different faults in different conditions of the vehicle. When conditions permit, the fault is reproduced under the same conditions as much as possible, and the problem is confirmed. Exclusion occurs when the system is similar to the phenomenon of interference, should be removed one by one the various components in the system, to determine which portions of an impact on the system. Replacement method When a module experiences abnormalities such as temperature, voltage, and control, the module position of the same number of strings is exchanged to diagnose a module problem or a harness problem. Environmental Inspection Method When the system fails, if the system cannot be displayed, we should not rush to consider it in depth, because we often ignore some details. First of all, we should look at the obvious things: if there is no power? Is the switch turned on? Are all the connections connected? Perhaps the root of the problem lies in it. Program upgrade method When the new program is burned, an unclear fault occurs, resulting in abnormal system control. The previous version of the program can be burned to compare and analyze the fault. Data analysis method When the BMS is controlled or related to faults, the BMS stored data can be analyzed to analyze the contents of the message in the CAN bus. Waterproof Membrane Switch,Custom Membrane Switches,Membrane Touch Switch,Waterproof Flexible Membrane Switches CIXI MEMBRANE SWITCH FACTORY , https://www.cnjunma.com
