Cell Module Surge Current Suppression Circuit

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Solution Overview

Problem

Conventional cell modules produce surge currents exceeding 10 amperes when connected to electronic devices, causing overload and damage to electronic components during energy storage charging.

Innovation Solution

A cell module with a surge current suppressed and controlled circuit, comprising a discharge switching circuit with a transistor, capacitor, and protection integrated circuit, gradually increases current flow and cuts off excess current to prevent overload, using a transistor Q2, capacitor C21, resistor R21, and protection integrated circuit 3242.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the cell module begins to charge energy storage elements immediately upon coupling to the electronic device, then the charging response speed is improved, but surge current exceeding 10 amperes is generated causing component damage

Engineering Contradiction:

Improvecharging response speedVSAvoidsurge current

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary action by pre-configuring a discharge switching circuit with a transistor, capacitor, and protection integrated circuit that automatically activates upon coupling. This circuit performs current limiting and surge suppression actions before the main charging current flows, preventing the harmful surge current from reaching the electronic device while maintaining fast charging response.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The discharge switching circuit serves as an intermediary between the cell module and the electronic device's energy storage elements. This intermediary circuit includes a transistor Q2 controlled by a protection integrated circuit 3242, which mediates the current flow by gradually increasing it and cutting off excess current, thus protecting the electronic device from surge current while enabling efficient charging.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If conventional cell module charging circuit is used, then the device complexity is reduced, but electronic components are burnt down due to overload current

Engineering Contradiction:

Improvecharging circuit complexityVSAvoidcomponent safety

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The protection integrated circuit 3242 performs multiple functions simultaneously: it controls the discharge switching transistor Q2 to limit surge current, monitors charging status, and provides over-current protection. This multi-functional approach protects electronic components without significantly increasing overall device complexity, as a single integrated circuit handles multiple protection tasks.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS7715163B2Electronic system and cell module thereof

Publication Date: 2010.05.11 ASUSTEK COMPUTER INC

AI summary

An electronic system and a cell module thereof are provided. The electronic system includes an electronic device and a cell module. The cell module includes a cell, a discharge switching circuit, and a surge current suppressed and controlled circuit. The discharge switching circuit is coupled to the cell. The surge current suppressed and controlled circuit is used for controlling the discharge switching circuit, so that the current flowing from the cell into the electronic device gradually increases by the discharge switching circuit when the electronic device is coupled to the discharge switching circuit.