{
  "type": "formula",
  "id": "soc-soh",
  "slug": "soc-soh",
  "domain": "动力电池",
  "title": "SOC / SOH 与可用容量计算器：健康容量、剩余电量、还需补多少",
  "h1": "SOC / SOH 与可用容量计算器",
  "question": "SOH 85%、SOC 40% 的 100Ah 电池，实际还剩多少电？充到 90% 还要补多少？",
  "summary": "把 SOH（健康度）、SOC（剩余电量）与额定容量三者的关系算清楚：这块电池现在实际能装多少、还剩多少、要充到目标 SOC 还得补多少、衰减掉了多少。接车判断续航缩短类故障时最常用。",
  "keywords": "SOC计算,SOH计算,电池健康度,可用容量,容量衰减,剩余电量,充电还需多久,续航缩短",
  "updated": "2026-09-26",
  "source": {
    "title": "动力电池全面技术解析",
    "url": "/report-battery-technology.html"
  },
  "inputs": [
    {
      "id": "ah",
      "label": "额定容量（出厂）",
      "unit": "Ah",
      "default": "100",
      "step": "any",
      "hint": "铭牌容量"
    },
    {
      "id": "soh",
      "label": "SOH（健康度）",
      "unit": "%",
      "default": "85",
      "step": "any",
      "hint": "诊断仪读出的 SOH"
    },
    {
      "id": "soc",
      "label": "当前 SOC",
      "unit": "%",
      "default": "40",
      "step": "any",
      "hint": "诊断仪读出的 SOC"
    },
    {
      "id": "tgt",
      "label": "目标 SOC",
      "unit": "%",
      "default": "90",
      "step": "any",
      "hint": "打算充到多少"
    }
  ],
  "outputs": [
    {
      "id": "health",
      "label": "实际健康容量",
      "unit": "Ah",
      "expr": "ah*soh/100",
      "digits": 1
    },
    {
      "id": "left",
      "label": "当前剩余容量",
      "unit": "Ah",
      "expr": "ah*soh/100*soc/100",
      "digits": 1
    },
    {
      "id": "need",
      "label": "充到目标还需补入",
      "unit": "Ah",
      "expr": "ah*soh/100*(tgt-soc)/100",
      "digits": 1
    },
    {
      "id": "lost",
      "label": "相比出厂衰减掉",
      "unit": "Ah",
      "expr": "ah*(1-soh/100)",
      "digits": 1
    }
  ],
  "words": {
    "need": "＝ 健康容量 × (目标 − 当前) ÷ 100"
  },
  "formulas": [
    {
      "name": "健康容量",
      "expr": "实际容量 = 额定容量 × SOH ÷ 100",
      "note": "SOH 是『当前容量 / 出厂容量』——它缩的是满容量，不是当前电量"
    },
    {
      "name": "剩余容量",
      "expr": "剩余 = 额定 × SOH ÷ 100 × SOC ÷ 100",
      "note": "先按 SOH 打折，再按 SOC 打折，两个百分比要连乘"
    },
    {
      "name": "还需补入",
      "expr": "补入 = 额定 × SOH ÷ 100 × (目标 − 当前) ÷ 100",
      "note": "用来估算充电量，配合充电电流还能估算时间"
    },
    {
      "name": "容量衰减",
      "expr": "衰减 = 额定 × (1 − SOH ÷ 100)",
      "note": "判断这块电池还值不值得修"
    }
  ],
  "reference": {
    "key_label": "SOH",
    "title": "SOH 与 100Ah 电池的实际容量对照",
    "columns": [
      "实际健康容量",
      "衰减掉"
    ],
    "entries": [
      {
        "k": "100%",
        "cells": [
          "100 Ah",
          "0 Ah"
        ]
      },
      {
        "k": "95%",
        "cells": [
          "95 Ah",
          "5 Ah"
        ]
      },
      {
        "k": "90%",
        "cells": [
          "90 Ah",
          "10 Ah"
        ]
      },
      {
        "k": "85%",
        "cells": [
          "85 Ah",
          "15 Ah"
        ]
      },
      {
        "k": "80%",
        "cells": [
          "80 Ah",
          "20 Ah"
        ]
      },
      {
        "k": "70%",
        "cells": [
          "70 Ah",
          "30 Ah"
        ]
      }
    ],
    "note": "以 100Ah 额定容量为例，由本页公式算出，可自行验算。行业中常把 SOH 80% 视为动力电池的一个参考门槛，但该门槛不是国家标准强制值，判定更换仍以厂家标准与实测为准。"
  },
  "reading": [
    {
      "title": "SOH 和 SOC 缩的不是同一个东西",
      "text": "最常见的心算错误：把 100Ah、SOH 85%、SOC 40% 算成 100 × 40% = 40Ah。正确的是 100 × 85% × 40% = 34Ah——满容量已经被 SOH 砍掉了 15Ah，剩下的电量要在这个缩小的桶里再打四折。"
    },
    {
      "title": "续航缩短，先分清是哪种缩水",
      "text": "SOH 低说明电池整体老化；SOH 正常但实测续航短，更可能是压差大、温度不均或 BMS 估算偏差。两者的处理方式完全不同——前者评估更换，后者做均衡或校准。"
    },
    {
      "title": "算完还能顺手估充电时间",
      "text": "拿到『还需补入多少 Ah』之后，除以充电电流就是大致时间；也可以用本站的 <a href=\"/tools/c-rate.html\">C 倍率计算器</a> 换算成 C 倍率档位。"
    }
  ],
  "notes": [
    "公式为 SOC / SOH 的通用定义（取自本站《动力电池全面技术解析》术语表），不涉及厂家数据。",
    "SOH 是估算值，不同厂家的算法不同（容量法 / 内阻法 / 混合法），诊断仪读数之间有差异。",
    "本工具算的是电量，不含温度、内阻、老化对可用功率的影响；更换判定以厂家标准与实测为准。"
  ],
  "sourceUrl": "https://loudilaoshi.com/report-battery-technology.html",
  "canonical": "https://loudilaoshi.com/tools/soc-soh.html",
  "license": "转载或引用请注明作者「娄迪老师」与原文链接"
}