208 lines
7.5 KiB
Python
208 lines
7.5 KiB
Python
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import struct
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import logging
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import binascii
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class Command30:
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def __init__(self):
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self.command = 0x30 # BMS状态信息命令
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def parse_30h_bms_status(self, data):
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"""
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解析30H BMS状态需求报文
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:param data: 完整的30H命令报文
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:return: 解析后的字典或None
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"""
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try:
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# 验证基本帧格式
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if len(data) < 14 or data[0:2] != b'JX' or data[2] != 0x30:
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logging.warning(f"30H命令帧格式不正确，原始报文: {binascii.hexlify(data)}")
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return None
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# 打印完整的原始报文以便调试
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print(f"完整原始报文: {binascii.hexlify(data)}")
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# 提取桩号
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pile_id_bytes = data[3:11]
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# 提取时间标识
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time_bytes = data[14:20]
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year = time_bytes[0] + 2000
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month, day, hour, minute, second = time_bytes[1:6]
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timestamp = f"{year:04d}-{month:02d}-{day:02d} {hour:02d}:{minute:02d}:{second:02d}"
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# 初始化解析索引
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current_index = 20
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# 解析电压需求
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voltage_request = struct.unpack("<H", data[current_index:current_index + 2])[0] / 10 # 0.1V
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current_index += 2
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# 解析电流需求
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current_request = struct.unpack("<H", data[current_index:current_index + 2])[0] / 10 # 0.1A
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current_index += 2
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# 解析充电模式
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charging_mode = data[current_index]
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current_index += 1
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# 解析最高单体电压
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max_cell_voltage = struct.unpack("<H", data[current_index:current_index + 2])[0] / 1000 # 0.001V
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current_index += 2
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# 解析最高单体电压所在电池组号
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max_cell_group = data[current_index]
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current_index += 1
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# 解析SOC
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soc = data[current_index]
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current_index += 1
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# 解析剩余充电时间
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remaining_charging_time = struct.unpack("<H", data[current_index:current_index + 2])[0]
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current_index += 2
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# 解析最高单体电压电池组编号
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max_voltage_group_number = data[current_index]
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current_index += 1
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# 解析最高动力蓄电池温度
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max_battery_temperature = data[current_index] - 50 # 偏移量-50
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current_index += 1
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# 解析最高温度检测点编号
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max_temperature_point = data[current_index]
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current_index += 1
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# 解析最低动力蓄电池温度
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min_battery_temperature = data[current_index] - 50 # 偏移量-50
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current_index += 1
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# 解析最低温度监测点编号
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min_temperature_point = data[current_index]
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current_index += 1
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# 解析告警信息
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warning_bytes = data[current_index]
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warnings = {
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"单体电压过高/过低": (warning_bytes & 0x03),
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"SOC过高/过低": ((warning_bytes >> 2) & 0x03),
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"充电过流": ((warning_bytes >> 4) & 0x03),
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"动力蓄电池温度过高": ((warning_bytes >> 6) & 0x03)
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}
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current_index += 1
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# 打印解析结果
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print("\n30H BMS状态需求报文解析结果:")
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print(f"桩号: {pile_id_bytes.hex()}")
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print(f"时间标识: {timestamp}")
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print(f"电压需求: {voltage_request}V")
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print(f"电流需求: {current_request}A")
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print(f"充电模式: {self.get_charging_mode_text(charging_mode)}")
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print(f"最高单体电压: {max_cell_voltage}V")
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print(f"最高单体电压所在电池组号: {max_cell_group}")
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print(f"SOC: {soc}%")
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print(f"剩余充电时间: {remaining_charging_time}分钟")
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print(f"最高单体电压电池组编号: {max_voltage_group_number}")
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print(f"最高动力蓄电池温度: {max_battery_temperature}°C")
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print(f"最高温度检测点编号: {max_temperature_point}")
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print(f"最低动力蓄电池温度: {min_battery_temperature}°C")
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print(f"最低温度监测点编号: {min_temperature_point}")
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print("告警信息:")
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for warning, level in warnings.items():
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print(f" {warning}: {self.get_warning_level_text(level)}")
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return {
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"pile_id": pile_id_bytes.hex(),
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"timestamp": timestamp,
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"voltage_request": voltage_request,
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"current_request": current_request,
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"charging_mode": self.get_charging_mode_text(charging_mode),
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"max_cell_voltage": max_cell_voltage,
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"max_cell_group": max_cell_group,
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"soc": soc,
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"remaining_charging_time": remaining_charging_time,
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"max_voltage_group_number": max_voltage_group_number,
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"max_battery_temperature": max_battery_temperature,
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"max_temperature_point": max_temperature_point,
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"min_battery_temperature": min_battery_temperature,
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"min_temperature_point": min_temperature_point,
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"warnings": {k: self.get_warning_level_text(v) for k, v in warnings.items()}
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}
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except Exception as e:
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logging.error(f"解析30H命令失败: {str(e)}")
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logging.error(f"原始报文: {binascii.hexlify(data)}")
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return None
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def get_charging_mode_text(self, mode):
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"""
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解析充电模式
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:param mode: 充电模式字节
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:return: 充电模式文本描述
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"""
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mode_map = {
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0x01: "恒流充电",
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0x02: "恒压充电",
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0x03: "涓流充电",
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0x04: "充电完成",
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0x05: "充电终止"
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}
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return mode_map.get(mode, f"未知模式 (0x{mode:02X})")
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def get_warning_level_text(self, level):
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"""
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解析告警级别
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:param level: 告警级别
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:return: 告警级别文本描述
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"""
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level_map = {
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0x00: "正常",
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0x01: "预警",
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0x02: "严重告警",
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0x03: "故障"
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}
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return level_map.get(level, f"未知级别 (0x{level:02X})")
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def process_30h_bms_status(self, data):
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"""
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处理30H BMS状态信息命令
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:param data: 完整的30H命令报文
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:return: 是否成功处理
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"""
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try:
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parsed_data = self.parse_30h_bms_status(data)
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if parsed_data is None:
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logging.warning("30H命令解析失败")
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return False
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# 记录BMS状态信息日志
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logging.info(
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f"收到桩号 {parsed_data['pile_id']} 的BMS状态信息: "
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f"SOC {parsed_data['soc']}%, "
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f"电压需求 {parsed_data['voltage_request']}V, "
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f"电流需求 {parsed_data['current_request']}A"
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)
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return True
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except Exception as e:
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logging.error(f"处理30H命令出错: {str(e)}")
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return False
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# 测试用例
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if __name__ == "__main__":
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# 30H命令测试报文
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test_30_data = bytes.fromhex(
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"4A 58 30 03 17 66 56 11 36 06 37 01 1C 00 19 01 09 0B 25 15 01 60 1B 8D 07 02 DA 07 A0 0F 4A C1 49 78 00 01 40 03 3C 05 00 10 64")
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parser = Command30()
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# 测试解析30H命令
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parser.process_30h_bms_status(test_30_data)
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