Battery Module Disconnection Circuit for Automatic Safe Isolation

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Solution Overview

Problem

Existing battery systems require manual safety disconnectors for safety during disassembly and repair, increasing complexity, cost, and volume, and lack efficient automatic module separation.

Innovation Solution

A battery system with a battery disconnection unit that includes a first main switch, precharge switch, and current sensor, controlled by a battery management system to automatically disconnect battery modules, eliminating the need for a manual safety disconnector and enhancing operational convenience and safety.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a manual safety disconnector is added to ensure safety during disassembly and repair, then safety is improved, but device complexity increases

Engineering Contradiction:
ImprovesafetyVSAvoiddevice complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The battery management system automatically controls the disconnection of battery modules through electronic switches based on operational status, eliminating the need for manual intervention and physical safety disconnectors. The system self-monitors and self-protects by detecting module states and autonomously isolating problematic modules.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces mechanical safety disconnectors with electronic control mechanisms. The battery management system uses electronic switches (main switches and precharge switches) controlled by the BMS to achieve disconnection, substituting mechanical physical disconnectors with electronic control systems that are more compact and controllable.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If a manual safety disconnector is added to ensure safety during disassembly and repair, then safety is improved, but manufacturing cost increases

Engineering Contradiction:
ImprovesafetyVSAvoidmanufacturing cost
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The battery management system automatically controls the disconnection of battery modules through electronic switches based on operational status, eliminating the need for manual intervention and physical safety disconnectors. The system self-monitors and self-protects by detecting module states and autonomously isolating problematic modules.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces mechanical safety disconnectors with electronic control mechanisms. The battery management system uses electronic switches (main switches and precharge switches) controlled by the BMS to achieve disconnection, substituting mechanical physical disconnectors with electronic control systems that are more compact and controllable.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If a manual safety disconnector is added to ensure safety during disassembly and repair, then safety is improved, but device volume increases

Engineering Contradiction:
ImprovesafetyVSAvoiddevice volume
Core Design Contradiction:
ReliabilityVSVolume of moving object

Solution Approach 1:

The battery management system automatically controls the disconnection of battery modules through electronic switches based on operational status, eliminating the need for manual intervention and physical safety disconnectors. The system self-monitors and self-protects by detecting module states and autonomously isolating problematic modules.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces mechanical safety disconnectors with electronic control mechanisms. The battery management system uses electronic switches (main switches and precharge switches) controlled by the BMS to achieve disconnection, substituting mechanical physical disconnectors with electronic control systems that are more compact and controllable.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

4Device complexity

If manual disconnection procedure is used, then device complexity is reduced, but ease of operation deteriorates

Engineering Contradiction:
Improvedevice complexityVSAvoidoperational convenience
Core Design Contradiction:
Device complexityVSEase of operation

Solution Approach 1:

The battery management system automatically controls the disconnection of battery modules through electronic switches based on operational status, eliminating the need for manual intervention and physical safety disconnectors. The system self-monitors and self-protects by detecting module states and autonomously isolating problematic modules.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces mechanical safety disconnectors with electronic control mechanisms. The battery management system uses electronic switches (main switches and precharge switches) controlled by the BMS to achieve disconnection, substituting mechanical physical disconnectors with electronic control systems that are more compact and controllable.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

5Device complexity

If manual disconnection procedure is used, then device complexity is reduced, but productivity deteriorates

Engineering Contradiction:
Improvedevice complexityVSAvoidmaintenance efficiency
Core Design Contradiction:
Device complexityVSProductivity

Solution Approach 1:

The battery management system automatically controls the disconnection of battery modules through electronic switches based on operational status, eliminating the need for manual intervention and physical safety disconnectors. The system self-monitors and self-protects by detecting module states and autonomously isolating problematic modules.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces mechanical safety disconnectors with electronic control mechanisms. The battery management system uses electronic switches (main switches and precharge switches) controlled by the BMS to achieve disconnection, substituting mechanical physical disconnectors with electronic control systems that are more compact and controllable.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS12046930B2Battery system
Publication Date: 2024.07.23 SAMSUNG SDI CO LTD
  • US12046930B2 patent drawing
  • US12046930B2 patent drawing

AI summary

A battery system includes: a first battery module including a plurality of first battery cells; a second battery module including a plurality of second battery cells; a battery disconnection unit connected between the first battery module and the second battery module, the battery disconnection unit including: a first main switch connected in series between the plurality of first battery cells and the plurality of second battery cells; and a precharge switch and a precharge resistor connected in series with each other and connected in parallel with the first main switch.