Battery Module Safety Control via Forced Discharge
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Solution Overview
Problem
High-output, large-capacity battery systems used in electric vehicles and hybrid electric vehicles face safety risks due to abnormal operation of battery modules, which can lead to dangerous states if not addressed promptly, as charged energy can exacerbate negative reactions and pose hazards during vehicle movement.
Innovation Solution
A method is introduced to control battery module operations by connecting abnormally operated modules to energy-consuming loads, such as resistors, to forcibly discharge stored energy, thereby preventing harm to external devices and ensuring safety through a control unit that manages connections between battery modules and external circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If battery modules are charged to high capacity for electric vehicles, then energy storage capability is improved, but safety risk increases when abnormal operation occurs
Solution Approach 1:
The control unit monitors battery module parameters in advance and identifies abnormal operation conditions before they lead to dangerous states. When abnormal operation is detected, the system proactively connects the affected battery module to an energy consuming load to forcibly discharge stored energy, preventing the development of hazardous conditions rather than merely responding to failures after they occur.
Solution Approach 2:
An energy consuming load serves as an intermediary component between the battery module and the external environment. This intermediary provides a controlled pathway for energy discharge, allowing the system to safely dissipate excess energy from abnormally operated battery modules without directly exposing external devices or the vehicle to dangerous electrical conditions.
2Reliability
If battery modules are isolated during abnormal operation to prevent harm, then safety is improved, but charged energy cannot be discharged and may cause dangerous states
Solution Approach 1:
The energy consuming load acts as a mediator that enables controlled energy discharge while maintaining isolation from external devices. The control unit manages the connection between the abnormal battery module and this intermediary load, allowing energy to be safely dissipated through the load without exposing the vehicle's external systems to the harmful effects of the abnormal battery operation.
Solution Approach 2:
The system converts the harmful trapped energy in the abnormal battery module into a beneficial controlled discharge process. By connecting the abnormal module to the energy consuming load, the previously harmful stored energy is transformed into a controlled energy flow that dissipates safely through the load, turning a potential danger into a controlled energy management solution.
3Device complexity
If control circuit interrupts operation of abnormal battery modules, then device complexity is reduced, but safety cannot be ensured during vehicle movement
Solution Approach 1:
The control unit performs preliminary identification of abnormal battery modules through continuous parameter monitoring. When abnormal operation is detected, the system takes preliminary action by connecting the identified module to the energy consuming load before the abnormal condition can escalate to a dangerous state during vehicle movement, ensuring proactive safety management.
Solution Approach 2:
The energy consuming load serves as an intermediary that enables safety management without requiring complex isolation procedures. Instead of complicating the control circuit with multiple isolation mechanisms, the system uses this intermediary load to provide a straightforward controlled discharge pathway, maintaining relative simplicity while ensuring safety during dynamic vehicle operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively prevents abnormal battery modules from affecting external devices by forcibly discharging energy to consuming loads, enhancing the overall safety of the battery system and preventing accidents by managing abnormal operations within the battery system.
Implementation Method 1
connecting the abnormally operated battery module or the abnormally operated battery module assembly to the corresponding energy consuming load to forcibly discharge the charged energy
Data Source
AI summary
Disclosed herein are a method of controlling the operation of battery modules in a battery system, which includes two or more battery modules or battery module assemblies, wherein the battery system further includes energy consuming loads for consuming charged energy, and the method includes, when a specific battery module or a specific battery module assembly is abnormally operated, connecting the abnormally operated battery module or the abnormally operated battery module assembly to the corresponding energy consuming load to forcibly discharge the charged energy, and a battery system that is capable of performing the battery system control method.