Add battery resources, bioyond_cell device registry, and fix file path resolution

unilabos/resources/battery/electrode_sheet.py

@@ -0,0 +1,67 @@
+"""
+电极片类定义
+Electrode Sheet Resource Classes
+"""
+
+from __future__ import annotations
+from typing import Any, Dict, Optional
+from pylabrobot.resources.resource import Resource
+
+
+class ElectrodeSheet(Resource):
+    """电极片类 - 用于纽扣电池组装"""
+    
+    def __init__(
+        self,
+        name: str,
+        size_x: float = 12.0,
+        size_y: float = 12.0,
+        size_z: float = 0.1,
+        category: str = "electrode_sheet",
+        electrode_type: str = "anode",  # "anode" 负极, "cathode" 正极, "separator" 隔膜
+        **kwargs
+    ):
+        """初始化电极片
+        
+        Args:
+            name: 电极片名称
+            size_x: X方向尺寸 (mm)
+            size_y: Y方向尺寸 (mm)
+            size_z: Z方向尺寸/厚度 (mm)
+            category: 类别
+            electrode_type: 电极类型
+        """
+        super().__init__(
+            name=name,
+            size_x=size_x,
+            size_y=size_y,
+            size_z=size_z,
+            category=category,
+            **kwargs
+        )
+        self._electrode_type = electrode_type
+        self._unilabos_state: Dict[str, Any] = {
+            "electrode_type": electrode_type,
+            "material": "",
+            "thickness": size_z,
+        }
+    
+    @property
+    def electrode_type(self) -> str:
+        """获取电极类型"""
+        return self._electrode_type
+    
+    def load_state(self, state: Dict[str, Any]) -> None:
+        """加载状态"""
+        super().load_state(state)
+        if isinstance(state, dict):
+            self._unilabos_state.update(state)
+    
+    def serialize_state(self) -> Dict[str, Any]:
+        """序列化状态"""
+        data = super().serialize_state()
+        data.update(self._unilabos_state)
+        return data
+
+
+