Battery Discharge Resistor Network for Chain Ignition Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery management systems lack effective methods to control discharge rate and heating to prevent chain ignition in battery swapping stations, which can occur when some batteries catch fire.
Innovation Solution
A battery management apparatus with multiple resistors connected in parallel, controlled by a controller that adjusts discharge rates and heating through switches based on battery abnormality signals and temperature information, allowing for selective discharge of abnormal batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a discharge resistor is used to control the discharge rate of a battery, then the discharge rate can be controlled, but the discharge rate cannot be adjusted without changing the resistance value of the discharge resistor
Solution Approach 1:
The patent divides a single discharge resistor into multiple resistors connected in parallel. Each resistor can be independently controlled by its own switch, allowing the system to segment the discharge path and provide adjustable discharge rates by selectively activating different resistors without requiring multiple separate resistor components.
Solution Approach 2:
The patent implements dynamic control of the discharge rate by using switches that can dynamically connect or disconnect individual resistors in parallel. This allows the discharge rate to be adjusted in real-time based on battery conditions (normal or abnormal states) without physically changing the resistor configuration, making the system adaptable to different operating conditions.
2Reliability
If the discharge rate is increased to prevent chain ignition of batteries, then safety is improved, but the system lacks flexible control over discharge rate adjustment
Solution Approach 1:
The patent incorporates a controller that monitors battery states (normal or abnormal conditions) and automatically adjusts the discharge rate by controlling the switches connected to the parallel resistors. When a battery is detected to be in an abnormal state, the controller can increase the discharge rate by activating additional resistors in parallel, providing feedback-based safety control that adapts to real-time battery conditions.
Solution Approach 2:
The patent changes the electrical parameters of the discharge circuit by altering which resistors are activated in parallel based on battery conditions. By changing the effective resistance value through selective switching of parallel resistors, the system can adjust the discharge rate parameter dynamically - increasing discharge rate for safety when batteries are abnormal, while maintaining flexibility for normal operation.
3Adaptability or versatility
If multiple resistors are used to control discharge rate, then discharge rate adjustability is improved, but the device structure becomes more complex
Solution Approach 1:
The patent merges multiple resistors into a parallel configuration that functions as a unified discharge circuit. Instead of using separate independent discharge circuits for each battery, the system combines multiple resistors and switches into an integrated parallel network that can be controlled collectively by a single controller, reducing overall system complexity while maintaining discharge rate adjustability.
Solution Approach 2:
The parallel resistor configuration serves multiple functions: it provides adjustable discharge rates for different battery conditions, enables safety control for preventing chain ignition, and can be controlled through a unified switch network. This multi-functional design reduces the need for separate components for each function, thereby reducing overall device complexity despite using multiple resistors.
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
The system effectively controls discharge rates and heating to prevent chain ignition, stabilizing battery operation and managing battery lifespan.
Implementation Method 1
A plurality of resistors R may be respectively connected to a plurality of batteries 10, 20, 30, 40, and 50... The plurality of resistors may be connected to one another in parallel
Data Source
AI summary
An aspect of the current disclosure includes a battery management apparatus including a plurality of resistors respectively connected to a plurality of batteries, respectively, a plurality of first switches configured to respectively connect the plurality of resistors to output terminals of the plurality of batteries, respectively, a plurality of second switches configured to connect the plurality of resistors to each other in parallel, and a controller configured to determine whether each of the plurality of batteries is abnormal, and control operations of the plurality of first switches and the plurality of second switches based on whether each battery of the plurality of batteries is abnormal.