电池系统的HAZOP Part1

     NHTSA的“Automotive Electronics Reliability Research Program”项目里面有一个有关评估和分析车载里电池兄台那个危害的项目，采用了两种方法，里面有一些内容作为结果部分，值得我们参考下的。

1)危害与可操作性分析（HAZOP）Hazard and Operability Analysis 

2)系统理论过程分析（STAP）System Theoretic Process Analysis,

整个操作步骤，大家做这块的比较熟，直接从HAZOP的结果来看。

1）系统功能框图

这里采用了一个简图，来表征电池系统的功能，控制层次和内部组件的交互过程。其组件的交互。

电池系统的功能定义：

• 充电功能（包含快充、慢充和能量回收）Accepts and stores HV electrical energy from both on-board and off-board chargers Accepts and stores electrical energy from the vehicle systems during regenerative braking

• Delivers HV electrical energy to the vehicle's high-voltage DC bus

• Provides a HV connect/disconnect system between the battery pack and the rest of the vehicle

• Provides a high-voltage interlock safety system

• Provides thermal management of the battery cells

• Provides pressure equalization within the battery pack （与电子系统无关）

• Provides a battery pack protection against the environment and damage due to mechanical impact or thermal events（与电子系统无关）

• Provides management (estimation and control) of the battery pack state of charge (SOC)

• Balances battery cell voltage

• Monitors moisture condensation within the battery pack

备注：这个一般BMS没有这个功能，而且凝露和霜冻是在电池模组以及电子系统绝缘考虑的范畴

• Estimates battery state of health（NA）

备注：SOH不在功能安全

• Stores appropriate data（NA）

• 电流检测 Measures the electrical current into and out of the battery pack

• 绝缘检测 Monitors DC ground fault (HV Isolation) through high-voltage interlock

• Monitors battery pack voltage

备注：在这个更多的是把Pack的内测电压和外侧电压需要做分类

• 监控电流 Monitors battery pack current

• Monitors battery pack temperature

• Monitors battery pack condensation

• Detects ground faults

• Provides a control system for the management of the RESS and its interfaces

• Controls HV contactors

• Controls battery pack charging, on and off board

• Controls battery pack discharge (vehicle load management)

• Controls battery pack regenerative charging

• Manages faults (diagnostics)

• Communicates with other vehicle systems and allows communications between the components of the RESS for status signals, control signals, and diagnostics

小结：未完待续，我估计在假期里面我能更新完，在苏州的某个酒店里面，带娃累了把这个补完