盒子 A 逐秒采样回路电流，云端或盒子 B 实时计算，动态分配每台充电桩的可用电流——总负荷始终不超变压器容量。两种方案、有网无网都能跑。Box A samples circuit currents every second; the cloud — or Box B when offline — allocates each charger's current in real time, keeping total load within the transformer capacity. Two plans, online or offline.
两只 DIN 导轨盒子，一套完整的充电负荷管理系统。Two DIN-rail boxes, one complete charging load-management system.
充电桩智能负荷管理（DLM）系统：盒子 A 逐秒采样电网进线、光伏与储能回路电流，云端或盒子 B 实时计算，动态分配每台充电桩的可用电流。A charging load-management (DLM) system: Box A samples grid, solar and storage circuits every second; the cloud or Box B computes and allocates each charger's available current in real time.
盒子 A（必配）＝采样 + 传输，接入 6 路 CT；盒子 B（选配）＝本地离线服务器，负责无网时的决策。均为 35 mm 标准导轨（DIN 导轨，IEC 60715）安装，A、B 分别只占 65 mm 与 100 mm 的导轨宽度，A 经一根 CAN 线为 B 供电并通信。Box A (required) = sampling + uplink, wired to 6 CTs; Box B (optional) = local offline server making decisions when the network is down. Both mount on 35 mm DIN rail (IEC 60715) and take only 65 mm and 100 mm of rail width; one CAN cable powers B and carries data.
变压器容量固定、想多装桩；站点网络不可靠、担心充电停摆；有光伏/储能、想优先消纳本地绿电——三个问题一次解决。Fixed transformer capacity but more chargers wanted; unreliable site networks that could stop charging; solar or storage whose local power should be used first — all three solved at once.
方案一（A + 云）适合网络稳定的站点；方案二（A + B + 云）在断网时由 B 本地接管，充电体验与在线一致。Plan 1 (A + cloud) suits sites with stable networks. Plan 2 (A + B + cloud) keeps charging unchanged when the network drops — Box B takes over locally.
8 个标准用例覆盖欧标/北美电网、RS485 电表与第二路电源（光伏/储能）。点选查看通道占用与接线要点。8 standard cases cover EU / North American grids, RS485 meters and a second source (solar or storage). Click a case to see channel usage and wiring notes.
住宅、小站点：只接 L1Homes and small sites: L1 only
参考电压只有一路，取自 A 自身供电线Single reference voltage from Box A supply
只有 2 路，无第三路；同一硬件的 2 通道配置2 channels only; same hardware, two-channel configuration
无 CT，经 RS485 读取电表；与 CT 并存时电表优先No CT; read over RS485; meter takes precedence when both exist
电网 L1 + 第二路电源 L1，各占一路Grid L1 + second source L1, one channel each
两组各 3 路，按来源分组Two groups of three, grouped by source
两组各 2 路，共 4 路Two channels per group, 4 in total
三相不接地 + 分相供电，此例以现场确认为准Three-phase ungrounded + split-phase supply; confirm on site
盒子 A 必配完成采样与上云；盒子 B 选配补上无网时的本地决策。Box A (required) handles sampling and cloud uplink; Box B (optional) adds local decisions when offline.
硬件规格与系统行为指标。Hardware specifications and system behaviour.
硬件规格Hardware
| 项目Item | 规格Specification |
|---|---|
| 采样通道Sampling channels | 6 路 CT：左组 3 路电网 / 右组 3 路光伏·储能6 CT inputs: left 3 for grid / right 3 for solar · storage |
| CT 接口CT connector | 3.5 mm 插孔，每通道一个3.5 mm jack, one per channel |
| 采样周期Sampling interval | ≤ 1 s≤ 1 s |
| 安装方式Mounting | 35 mm 标准导轨（DIN 导轨，IEC 60715）35 mm DIN rail (IEC 60715) |
| 外形尺寸Dimensions | 盒子 A：65 × 90 × 33 mm 盒子 B：100 × 100 × 40 mm 宽 × 高 × 深Box A: 65 × 90 × 33 mm Box B: 100 × 100 × 40 mm W × H × D |
| 工作温度Operating temperature | -30 ℃ ~ +50 ℃-30 °C to +50 °C |
| 防护等级Ingress protection | IP20（柜内安装）IP20 (inside enclosure) |
| 上行通信Uplink | 盒子 A：WiFi；盒子 B：WiFi + 以太网 LANBox A: WiFi; Box B: WiFi + Ethernet LAN |
| 盒间连接Inter-box link | CAN：一根线供电 + 通信CAN: one cable for power + data |
| 电表接入Meter input | P1 / RS485 电表P1 / RS485 meter |
| 桩侧通信Charger link | Modbus TCPModbus TCP |
| 数据安全Data security | TLS 1.3TLS 1.3 |
| 电网制式Grid compatibility | 欧标单相/三相、北美分相EU single/three-phase, NA split-phase |
系统行为指标System behaviour
| 项目Item | 规格Specification |
|---|---|
| 动态控制周期Dynamic control cycle | ≤ 5 s≤ 5 s |
| 断网接管（B 在位）Failover with Box B | ≤ 60 s，充电不中断≤ 60 s, charging continues |
| 回网回切Switch-back on recovery | 无扰回切，电流斜率 ≤ 2 A/sBumpless switch-back, current ramp ≤ 2 A/s |
| 断网（仅 A，无 B）Offline, Box A only | 各桩回落预置保守限值Chargers revert to preset conservative limits |
云平台开箱即用，无需自建服务器。The cloud platform works out of the box — no self-hosted servers required.
站点级负荷策略、时段与优先级在线配置，云端与盒子 B 同构下发Site-level policies, schedules and priorities configured online, delivered identically to Box B
多站点集中监控，实时状态与告警Central monitoring of all sites, live status and alarms
充电与用电曲线、负荷统计报表Charging and energy curves, load statistics and reports
按分时电价安排充电窗口，降低用电成本Schedule charging windows against time-of-use tariffs to cut energy cost
远程固件升级与设备档案管理Remote firmware updates and device records