Wireless Battery Cell Monitoring for Wiring-Light Safety Sensing
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Solution Overview
Problem
Traditional battery management systems (BMS) face challenges in monitoring the temperature, voltage, and current of each battery cell due to complex wiring harnesses, high manufacturing costs, and reduced temperature monitoring points, leading to security risks in battery packs.
Innovation Solution
A wireless acquisition device is used to monitor the temperature, voltage, and current of each battery cell, along with atmospheric pressure and gas composition, utilizing a wireless acquisition side connected to each battery and a wireless reception side for edge data processing, transmitting data to a thermal management system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional wired BMS is used to monitor voltage, current and temperature of each battery cell, then monitoring coverage is achieved, but wiring harness complexity and manufacturing cost increase significantly
Solution Approach 1:
The patent replaces the traditional mechanical wired connection system with a wireless monitoring system. Each battery cell is equipped with a wireless sensor node that transmits voltage, current, and temperature data wirelessly to a central receiver, eliminating the need for complex wired harnesses while maintaining comprehensive monitoring coverage of all battery cells.
Solution Approach 2:
The monitoring system is divided into independent wireless sensor nodes, each responsible for monitoring a single battery cell. This segmentation allows each node to operate autonomously and transmit data independently, simplifying the overall system architecture and reducing wiring complexity compared to a centralized wired system.
2Ease of manufacture
If monitoring points for temperature are reduced to lower cost, then manufacturing cost decreases, but temperature monitoring comprehensiveness and safety deteriorate
Solution Approach 1:
The wireless sensor node is designed as a multi-functional integrated unit that simultaneously measures voltage, current, and temperature of each battery cell. This universal design allows comprehensive monitoring of all three parameters at every cell without requiring separate monitoring systems, thereby maintaining safety while controlling costs through a unified platform.
Solution Approach 2:
Each battery cell serves itself by having an integrated wireless sensor node attached directly to it, enabling the cell to autonomously monitor its own voltage, current, and temperature conditions. This self-service approach eliminates the need for extensive external wiring and manual monitoring setup, reducing manufacturing complexity while achieving complete monitoring coverage.
3Reliability
If more monitoring parameters (pressure and gas composition) are added to battery pack safety monitoring, then safety monitoring capability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges multiple monitoring functions (voltage, current, temperature, pressure, and gas composition sensing) into a single integrated wireless sensor node system. By combining these diverse sensing capabilities into one unified wireless platform, the system achieves comprehensive safety monitoring without proportionally increasing device complexity, as all sensors communicate through the same wireless interface and protocol.
Data Source
AI summary
Provided are wireless acquisition device and method for battery safety monitoring of a battery cluster. The device includes a wireless acquisition side, and a wireless reception side. The wireless acquisition side is fixedly arranged on a single battery in a battery module box, and both ends of the wireless acquisition side are electrically and respectively connected to a cathode and an anode of the single battery where the wireless acquisition side is located, and configured to acquire a temperature, a voltage and a current of a battery cell, an atmospheric pressure in the battery module box, and gas composition in a sealed space. The wireless reception side is configured to receive data collected by the wireless acquisition side through wireless transmission, perform edge data processing on the data, and then transmit the data to a battery thermal management system.