ems-core v1.0.0: Standard EMS platform core

Shared backend + frontend for multi-customer EMS deployments.
- 12 enterprise modules: quota, cost, charging, maintenance, analysis, etc.
- 120+ API endpoints, 37 database tables
- Customer config mechanism (CUSTOMER env var + YAML config)
- Collectors: Modbus TCP, MQTT, HTTP API, Sungrow iSolarCloud
- Frontend: React 19 + Ant Design + ECharts + Three.js
- Infrastructure: Redis cache, rate limiting, aggregation engine

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/app/models/device.py

@@ -0,0 +1,51 @@
+from sqlalchemy import Column, Integer, String, Float, Boolean, DateTime, ForeignKey, Text, JSON
+from sqlalchemy.sql import func
+from app.core.database import Base
+
+
+class DeviceType(Base):
+    __tablename__ = "device_types"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    code = Column(String(50), unique=True, nullable=False)  # pv_inverter, heat_pump, solar_thermal, battery, meter, sensor
+    name = Column(String(100), nullable=False)
+    icon = Column(String(100))
+    data_fields = Column(JSON)  # 该类型设备的数据字段定义
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+
+
+class DeviceGroup(Base):
+    __tablename__ = "device_groups"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    name = Column(String(100), nullable=False)
+    parent_id = Column(Integer, ForeignKey("device_groups.id"))
+    location = Column(String(200))
+    description = Column(Text)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+
+
+class Device(Base):
+    __tablename__ = "devices"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    name = Column(String(100), nullable=False)
+    code = Column(String(100), unique=True, nullable=False)  # 设备编号
+    device_type = Column(String(50), ForeignKey("device_types.code"), nullable=False)
+    group_id = Column(Integer, ForeignKey("device_groups.id"))
+    model = Column(String(100))  # 型号
+    manufacturer = Column(String(100))  # 厂商
+    serial_number = Column(String(100))  # 序列号
+    rated_power = Column(Float)  # 额定功率 kW
+    install_date = Column(DateTime(timezone=True))
+    location = Column(String(200))
+    protocol = Column(String(50))  # modbus_tcp, modbus_rtu, opc_ua, mqtt, http_api
+    connection_params = Column(JSON)  # 连接参数 (IP, port, slave_id, etc.)
+    collect_interval = Column(Integer, default=15)  # 采集间隔(秒)
+    category_id = Column(Integer, ForeignKey("energy_categories.id"))  # 分项类别
+    status = Column(String(20), default="offline")  # online, offline, alarm, maintenance
+    is_active = Column(Boolean, default=True)
+    metadata_ = Column("metadata", JSON)  # 扩展元数据
+    last_data_time = Column(DateTime(timezone=True))
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())