EV systems › High-voltage battery system › Principle
系统说明 · T00610871

 System description系统说明

Description说明
The high-voltage battery system is an important energy source for the vehicle and an important link between the battery pack and the electric vehicle. Collect, process, and store important information (SOC, temperature, voltage, current, insulation resistance, etc.) during the operation of the battery pack in real time, and exchange information with external devices to solve key issues such as the safety, availability, ease of use, and service life of the battery pack. The main function is to improve the utilization rate of the battery, prevent the battery from overcharging and over-discharging, extend the service life of the battery, and monitor the status of the battery.动力电池系统是车辆的重要能量来源、是连接电池组箱和电动汽车的重要纽带。实时采集、处理、存储电池组箱运行过程中的重要信息(SOC、温度、电压、电流、绝缘电阻等)，与外部设备进行信息交换，从而解决电池组的安全性、可用性、易用性、使用寿命等关键问题。主要作用是为了能够提高电池的利用率，防止电池出现过度充电和过度放电，延长电池的使用寿命，监控电池的状态等。
composition组成
1. The high-voltage battery system consists of battery pack, battery management system (BMS), high and low voltage wiring harness, thermal management part and structural parts.动力电池系统由电池组箱、电池管理系统(BMS)、高低压线束、热管理部分和结构件等组成。
2. The battery pack mainly contains main positive relay, main negative relay, precharge relay, precharge resistor, DC fast charge relay (the battery-swapping version is inside the high-voltage distribution box), current sensor, main fuse, battery module, etc.电池组箱主要包含主正继电器、主负继电器、预充继电器、预充电阻、快充继电器(换电版车型在高压配电盒里面)、电流传感器、主保险、电池模组等。
3. The battery management system (BMS) mainly includes the main board BMC, slave board CMC, sensors and wiring harnesses.电池管理系统(BMS)主要包含主板BMC、从板CMC、传感器及线束等。
4. High and low voltage wiring harnesses mainly include various high and low connectors and connector terminals.高低压线束主要包含各种高低连接器和接插件端子等。
5. The thermal management part mainly includes heating part, cooling part, pipelines and temperature sensors, etc.热管理部分主要包含加热部分、冷却部分、管路及温度传感器等。
6. Structural parts mainly include installation parts, seals, metal parts and box parts.结构件主要包含安装件、密封件、金属件和箱体部分等。
Function功能
1. The high-voltage battery system provides the switching on and off of high-voltage circuits, and has functions such as high-voltage safety management, high-voltage charging management, and fault protection.动力电池系统提供高压回路的接通和切断，具有高压电安全管理、高压电充电管理、故障保护等功能。
2. High-voltage power safety management: including collision power outage, high-voltage system loop insulation, high-voltage interlock (HVIL) detection and processing, etc.高压电安全管理：包括碰撞断电、高压系统回路绝缘、高压互锁检测与处理等。
3. High-voltage power-on management: Start the vehicle, the vehicle starts self-test. After the self-test is completed and there are no faults, a command is sent to the battery management system (BMS). The battery management system (BMS) controls the pre-charge relay and the main negative relay to close; the high-voltage power is transmitted to the high-voltage appliance through the main fuse pre-charge relay and pre-charge resistor, and the high-voltage power enters pre-charge; when the difference between the pre-charge voltage and the battery voltage is less than the set threshold, the battery management system (BMS) controls the main positive relay to close, and the vehicle high-voltage power-on is completed.高压电上电管理：启动车辆，车辆开始自检，自检完成无故障后发出命令给电池管理系统(BMS)，电池管理系统(BMS)控制预充继电器、主负继电器闭合；高压电经主保险预充继电器、预充电阻传递给高压用电器，高压电进入预充电；当预充电电压与电池电压的压差小于设定阈值时，电池管理系统(BMS)控制主正继电器闭合，整车高压上电完成。
4. Fault protection: including protection against overcurrent, overtemperature, overvoltage, undervoltage, leakage current and other faults.故障保护：包括对过流、过温、过压、欠压、漏电流等故障进行保护。