diff --git a/fys-common/src/main/java/com/fuyuanshen/utils/enums/NanoIdLengthEnum.java b/fys-common/src/main/java/com/fuyuanshen/utils/enums/NanoIdLengthEnum.java
new file mode 100644
index 0000000..944cfeb
--- /dev/null
+++ b/fys-common/src/main/java/com/fuyuanshen/utils/enums/NanoIdLengthEnum.java
@@ -0,0 +1,32 @@
+package com.fuyuanshen.utils.enums;
+
+/**
+ * @author: 默苍璃
+ * @date: 2025-06-2019:08
+ */
+/**
+ * 表示 NanoId 生成时使用的长度配置
+ */
+public enum NanoIdLengthEnum {
+
+    /**
+     * 默认设备类型 ID 长度
+     */
+    DEVICE_TYPE_ID(10),
+
+    /**
+     * 更长的唯一标识符，用于高并发场景
+     */
+    HIGH_CONCURRENCY(15);
+
+    private final int length;
+
+    NanoIdLengthEnum(int length) {
+        this.length = length;
+    }
+
+    public int getLength() {
+        return length;
+    }
+
+}
diff --git a/fys-system/src/main/java/com/fuyuanshen/modules/system/domain/dto/DeviceExcelImportDTO.java b/fys-system/src/main/java/com/fuyuanshen/modules/system/domain/dto/DeviceExcelImportDTO.java
index 440fc6d..a75c4de 100644
--- a/fys-system/src/main/java/com/fuyuanshen/modules/system/domain/dto/DeviceExcelImportDTO.java
+++ b/fys-system/src/main/java/com/fuyuanshen/modules/system/domain/dto/DeviceExcelImportDTO.java
@@ -5,6 +5,7 @@ import com.alibaba.excel.annotation.write.style.ColumnWidth;
 import com.alibaba.excel.annotation.write.style.ContentRowHeight;
 import com.alibaba.excel.annotation.write.style.HeadRowHeight;
 import com.alibaba.excel.converters.bytearray.ByteArrayImageConverter;
+import io.swagger.annotations.ApiModelProperty;
 import lombok.Data;
 import com.fuyuanshen.modules.system.converter.IgnoreFailedImageConverter;
 
@@ -43,6 +44,11 @@ public class DeviceExcelImportDTO {
     @ColumnWidth(20)
     private String deviceMac;
 
+    @ExcelProperty("设备IMEI")
+    @ColumnWidth(20)
+    @ApiModelProperty(value = "设备IMEI")
+    private String deviceImei;
+
     @ExcelProperty("设备SN")
     @ColumnWidth(20)
     private String deviceSn;
diff --git a/fys-system/src/main/java/com/fuyuanshen/modules/system/service/impl/DeviceServiceImpl.java b/fys-system/src/main/java/com/fuyuanshen/modules/system/service/impl/DeviceServiceImpl.java
index 256bc41..7066121 100644
--- a/fys-system/src/main/java/com/fuyuanshen/modules/system/service/impl/DeviceServiceImpl.java
+++ b/fys-system/src/main/java/com/fuyuanshen/modules/system/service/impl/DeviceServiceImpl.java
@@ -31,6 +31,7 @@ import com.fuyuanshen.modules.system.service.DeviceTypeGrantsService;
 import com.fuyuanshen.modules.system.service.UserService;
 import com.fuyuanshen.modules.utils.NanoId;
 import com.fuyuanshen.utils.*;
+import com.fuyuanshen.utils.enums.NanoIdLengthEnum;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -267,7 +268,7 @@ public class DeviceServiceImpl extends ServiceImpl<DeviceMapper, Device> impleme
             }
 
             // 自定义16位id
-            Long generatedId = NanoId.generate(16);
+            Long generatedId = NanoId.generate(NanoIdLengthEnum.HIGH_CONCURRENCY.getLength());
 
             // -- 记录分配历史
             DeviceAssignments deviceAssignments = new DeviceAssignments();
@@ -353,7 +354,7 @@ public class DeviceServiceImpl extends ServiceImpl<DeviceMapper, Device> impleme
             deviceMapper.update(updateDevice, wrapper);
 
             // 自定义16位id
-            Long generatedId = NanoId.generate(16);
+            Long generatedId = NanoId.generate(NanoIdLengthEnum.HIGH_CONCURRENCY.getLength());
             // -- 授权设备类型给客户
             // QueryWrapper<DeviceTypeGrants> deviceTypeGrantsQueryWrapper = new QueryWrapper<>();
             // Long count = deviceTypeGrantsMapper.selectCount(deviceTypeGrantsQueryWrapper);
@@ -384,7 +385,7 @@ public class DeviceServiceImpl extends ServiceImpl<DeviceMapper, Device> impleme
             // 查询设备类型
             DeviceType deviceType = deviceTypeMapper.selectById(device.getDeviceType());
             // SnowflakeGenerator snowflakeGenerator = new SnowflakeGenerator();
-            Long id = NanoId.generate(16);
+            Long id = NanoId.generate(NanoIdLengthEnum.HIGH_CONCURRENCY.getLength());
             deviceType.setId(id);
             deviceType.setCreateTime(timestamp);
             deviceType.setCreateBy(currentUser.getUsername());
diff --git a/fys-system/src/main/java/com/fuyuanshen/modules/system/service/impl/DeviceTypeServiceImpl.java b/fys-system/src/main/java/com/fuyuanshen/modules/system/service/impl/DeviceTypeServiceImpl.java
index b697415..11be835 100644
--- a/fys-system/src/main/java/com/fuyuanshen/modules/system/service/impl/DeviceTypeServiceImpl.java
+++ b/fys-system/src/main/java/com/fuyuanshen/modules/system/service/impl/DeviceTypeServiceImpl.java
@@ -6,6 +6,7 @@ import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.fuyuanshen.modules.system.domain.DeviceTypeGrants;
 import com.fuyuanshen.modules.system.mapper.DeviceTypeGrantsMapper;
 import com.fuyuanshen.modules.utils.NanoId;
+import com.fuyuanshen.utils.enums.NanoIdLengthEnum;
 import lombok.RequiredArgsConstructor;
 import com.fuyuanshen.modules.security.service.UserCacheManager;
 import com.fuyuanshen.modules.security.service.dto.JwtUserDto;
@@ -125,7 +126,7 @@ public class DeviceTypeServiceImpl extends ServiceImpl<DeviceTypeMapper, DeviceT
     @Override
     @Transactional(rollbackFor = Exception.class)
     public void create(DeviceType resources) {
-        Long deviceTypeId = NanoId.generate(16);
+        Long deviceTypeId = NanoId.generate(NanoIdLengthEnum.HIGH_CONCURRENCY.getLength());
         resources.setId(deviceTypeId);
         resources.setCustomerId(SecurityUtils.getCurrentUserId());
         deviceTypeMapper.insert(resources);
@@ -137,7 +138,6 @@ public class DeviceTypeServiceImpl extends ServiceImpl<DeviceTypeMapper, DeviceT
         deviceTypeGrants.setGrantorCustomerId(SecurityUtils.getCurrentUserId());
         deviceTypeGrants.setGrantedAt(new Date());
         deviceTypeGrantsMapper.insert(deviceTypeGrants);
-
     }