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Analysis of the organizational structure, basic functions and operating mechanism of the 602030 lipo battery management system
There are many articles introducing the 602030 lipo battery management system, which are highly technical and are basically incomprehensible to non-professional engineering and technical personnel. The following focuses on the word "management" to introduce the organizational structure, basic functions and operating mechanism of the 602030 lipo battery management system to popularize scientific knowledge in this area. 1. Understanding of the 602030 lipo battery management system (1) System: multiple individuals with certain functions are organized into a new unit according to certain requirements (rules). For example, multiple batteries are connected head to tail (or head to head, tail to tail) to form a new unit. (2) Management: activities to clean up and organize specific objects in an area according to a requirement and certain rules. For example, the factory cleans and organizes the items in the material warehouse according to certain requirements and rules. (3) 602030 lipo battery: an electrochemical storage device that provides electric energy for electric vehicles. (4) 602030 lipo battery management system: activities related to the management activities of the power system. 2. Organizational structure of the 602030 lipo battery management system (1) Minimum unit: refers to a battery cell. At present, there are three types of 602030 lipo battery cells: cylindrical, square, and flat. (2) Basic unit: A new battery pack is formed by connecting more than 3 single cells in parallel; (2) Module: A battery pack consisting of more than 3 basic units connected in series; (3) Battery pack: A box (usually made of metal) that encapsulates the battery pack (module) and is required to be dustproof, waterproof, and equipped with an interface. (4) 602030 lipo battery management system function box: An integrated circuit function box with current, voltage, temperature automatic measurement and communication modules. In layman's terms, the hardware structure and layout of the 602030 lipo battery of an electric vehicle that has been off the production line have been solidified. In other words, the 602030 lipo battery management system no longer manages the battery hardware structure and layout. 3. Basic management functions of the 602030 lipo battery management system The hardware structure and layout of the 602030 lipo battery of an electric vehicle and product design work have been introduced above, but what are its management functions? (1) Why do we need to manage the 602030 lipo battery pack (system)? The 602030 lipo battery pack (system) has two basic functions: one is charging, and the other is discharging. (a) Charging management: When can it be charged, when can it not be charged, is it fully charged? It cannot be overcharged, etc. (b) Discharging management: When can it be discharged, when can it not be discharged, is it fully discharged? Do not over-discharge, etc.; (c) The working environment temperature of the 602030 lipo battery pack (system) should be monitored, and overheating and smoke should be monitored. If a safety hazard occurs, an alarm should be issued. If a safety accident occurs, the preparatory facilities should be activated for processing. There are three levels of management functions: (i) For the working state of the 602030 lipo battery pack (system), the relevant changes should be measured; (ii) The dynamic value of the change of the relevant change should be analyzed and judged. If it exceeds the normal value, an alarm should be issued; (III) If the 602030 lipo battery pack (system) fails, relevant measures should be initiated, such as downgraded operation. 4. Mechanism of 602030 lipo battery management system (1) Understanding of mechanism (a) refers to the structure and operation principle of the machine; (b) the structure, function and relationship of the organism; (c) the process and mode of interaction between the organizations or parts of a working system. (2) Introduction to the mechanism of 602030 lipo battery management system ① Three basic state quantities of 602030 lipo battery pack (system): voltage, current, temperature (a) Voltage: Where there is electricity, there is an electric field. The electric field force at different positions in the electric field is different. Voltage is a measure of the ability of the electric field force to do work. Voltage is the driving force for the flow of electrons; (b) Current Under the drive of voltage, electrons flow from the negative electrode of the power source to the positive electrode. Current refers to the amount of charge that passes through the cross section of a conductor within 1 second; (c) Temperature: a physical quantity that indicates the degree of hotness or coldness of an object. (Note: The voltage, current and temperature of the battery are the basis for the top-level calculation and control logic of the battery management system) ②Measure the comprehensive state of the 602030 lipo battery pack (system): SOC and SOH (a) Remaining capacity (SOC): The full name is State of Charge, state of charge. It represents the ratio of the remaining capacity of the battery after a period of use or long-term storage to the capacity of its fully charged state, usually expressed as a percentage. Its value range is 0~1. When SOC=0, it means that the battery is fully discharged, and when SOC=1, it means that the battery is fully charged. (b) 602030 lipo battery health (SOH): that is, the percentage of the fully charged capacity of the battery relative to the rated capacity. The new battery is 100% and the completely scrapped battery is 0%. (3) Difficulties in the mechanism design of the 602030 lipo battery management system (a) How to measure voltage, current and temperature? There are corresponding sensor products for voltage, current, and temperature. The quality and accuracy of sensors from different manufacturers are different. The measurement error processing methods are different. Different manufacturers have their own unique technologies and processes. The basic principle is that automotive products must be selected. (b) Estimation of remaining power and 602030 lipo battery health? The theoretical model of remaining power and 602030 lipo battery health estimation is different for different manufacturers, and the estimation error processing is also different. Different manufacturers have their own unique technologies and processes in their products. The basic principle is to have their own characteristics and core competitiveness. 5. Tesla 602030 lipo battery Management System Function Box ① BMS adopts a master-slave architecture. The main controller (BMU) is responsible for high voltage, insulation detection, high voltage interlocking, contactor control, external communication and other functions; ② The controller (BMB) is responsible for single cell voltage and temperature detection, and reports to BMU; ③ BMU has a master-slave dual MCU design. The slave MCU can detect the working status of the main MCU and obtain control authority once it is found to be invalid.
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