Parallel Battery Pack Wake-Up Control via Isolated Signal Transmission
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Solution Overview
Problem
Existing wake-up methods for parallel battery packs are cumbersome, prone to device burnout, and do not satisfy application scenarios where load output terminals are faulty, especially when multiple groups of battery packs are used in parallel.
Innovation Solution
A system and method for wake-up control of parallel battery packs, where a first battery pack receives a trigger signal to output a driving signal, which is processed and transmitted to a second battery pack to wake up its control unit, utilizing signal processing units with driving and isolation elements to ensure safe and reliable activation of all packs in parallel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing wake-up method using power terminal output is used, then the system is simple and reliable, but it cannot satisfy application scenarios where load output terminals are faulty and may cause device burnout
Solution Approach 1:
The patent introduces an isolated signal transmission mechanism as an intermediary between battery packs. The isolation elements (optical isolators or magnetic isolators) act as mediators that transmit wake-up signals while electrically isolating the circuits, preventing fault propagation and device burnout while maintaining signal transmission capability across different electrical potential domains.
Solution Approach 2:
The patent replaces the traditional electrical signal transmission through power terminals with an isolated signal transmission system using optical or magnetic coupling. This substitution eliminates direct electrical connection for signal transmission, preventing harmful electrical faults from propagating while maintaining the wake-up function.
2Reliability
If multiple physical buttons are used for wake-up in single PACK systems, then the system is reliable, but the operation becomes cumbersome and inconvenient
Solution Approach 1:
The patent merges the wake-up control of multiple battery packs into a unified system where a single trigger signal can wake up one battery pack, which then automatically transmits the signal to other parallel-connected battery packs through the isolated signal lines. This combining of control functions reduces the number of physical buttons needed while maintaining reliable wake-up capability across all packs.
Solution Approach 2:
The patent implements a self-service mechanism where the first battery pack that receives the trigger signal automatically generates and transmits wake-up signals to other battery packs through the isolated signal transmission system. This eliminates the need for manual operation on each individual pack, as the system serves itself by propagating the wake-up signal automatically.
3Ease of manufacture
If the wake-up signal is transmitted through power lines, then the implementation is simple, but the risk of device burnout or equipment damage increases when load output terminals have faults
Solution Approach 1:
The patent introduces isolation elements as intermediaries between the power lines and the battery pack control circuits. These isolators transmit the wake-up signal while blocking harmful electrical faults, maintaining the simplicity of power line transmission while eliminating the burnout risk through electrical isolation.
Solution Approach 2:
The patent segments the signal transmission path into isolated sections using optical or magnetic isolators. This segmentation separates the high-voltage power domain from the low-voltage control domain, allowing simple power line transmission for wake-up signals while preventing harmful factors from crossing between domains.
Data Source
AI summary
A system for wake-up control of parallel battery packs includes a first battery pack and a second battery pack connected in parallel. The first battery pack includes a first control unit, and the second battery pack includes a second control unit. The first battery pack is configured to receive a first trigger signal to wake up the first control unit. The first control unit of the first battery pack is configured to output a first driving signal after being woken up. The second battery pack is configured to receive a second driving signal sent from the first battery pack, and transmit the processed second driving signal to the second control unit of the second battery pack, to wake up the second control unit of the second battery pack. The second driving signal is output after the first driving signal is processed by the first battery pack.