1. 核心问题与场景定义

在大型电池包热管理系统（BMS）中，准确获取全场温度分布是实现精细化控制和热失控预警的前提。然而，受限于成本、通信带宽和绝缘要求，实际工程中无法在每个电芯表面布置传感器。

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项目背景

本项目旨在设计一款基于 USB-C PD 输入 的 3S 18650 锂电池 UPS，支持 5A 大电流充放电。核心方案采用 HUSB238（PD 诱骗）搭配 BQ25798（Buck-Boost 充电管理）。

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I built a new AI scheduling tool Check it out here.

I built a new Serial number generator Check it out here.

I built a Modbus RTU CRC checker Check it out here.

• mcd = directional intensity (good for indicators).
• lm = total light output (good for illumination).
• lux = light on a surface.
• At 1 m, on-axis: lux ~ cd.
• A 180 mcd LED is an indicator, not a light source.
• Ring of 54 white LEDs at ~8.5 lm each -> ~459 lm total -> ~146 lux at 1 m on-axis (assuming wide spread). Usually run well below max for comfort and thermals.

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1) Frame structure (RTU)

Field	Size	Notes
Address	1 byte	Slave ID: 1…247 (0 = broadcast; 248–255 reserved).
Function code	1 byte	e.g., 0x03 Read Holding Regs; 0x06 Write Single Reg.
Data	0…252 B	Depends on function: start address, quantity, payload, byte count…
CRC-16	2 bytes	Little-endian on the wire: CRC low byte first, then high byte. Polynomial 0xA001, init 0xFFFF.

Framing by silence: ≥ 3.5 character times between frames; ≤ 1.5 character times between bytes within a frame.

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This MATLAB script demonstrates how to generate a DXF file containing a sinusoidal curve represented as a polyline with a controlled number of points. All units are in millimeters (mm).

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This MATLAB code simulates the initial velocity of a water rocket based on varying air-water ratios (\alpha) and internal air pressures (P), and visualizes the results in a 3D surface plot.

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This MATLAB script demonstrates how to visualize and customize 3D geometrical elements such as cuboids, cylinders, and arrows, often used to represent components in engineering setups like sensor assemblies.

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