Battery Cell Balancing Resistor for Thermal Energy Control
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Solution Overview
Problem
Existing battery management systems face challenges in efficiently and economically managing temperature and balancing battery cells in energy storage systems (ESS) due to complex energy control methods that lead to inefficiencies and environmental waste.
Innovation Solution
A battery management system (BMS) with a novel resistor design for current management, including laminated wire-type resistors and heat dissipation mechanisms, to stabilize temperature and balance battery cells by bypassing current and dissipating excess energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If passive balancing resistance is used to balance battery cells, then cell voltage balancing is achieved, but energy efficiency deteriorates due to energy waste as heat
Solution Approach 1:
The patent converts the harmful effect of resistive heating into a beneficial thermal management function. The balancing resistance is designed to dissipate heat that raises battery cell temperature, which is then utilized to heat batteries at low temperature, eliminating the need for separate heating devices and improving overall energy efficiency.
Solution Approach 2:
The balancing resistance performs dual functions: it balances cell voltages by dissipating excess energy from overcharged cells, and simultaneously serves as a heating source for batteries operating at low temperatures. This multi-functionality reduces the number of components needed and improves energy utilization efficiency.
2Productivity
If active balancing is performed simultaneously with passive balancing, then cell balancing speed is improved, but system complexity increases
Solution Approach 1:
The patent implements periodic switching between active balancing and passive balancing modes based on battery cell state monitoring. The control unit selectively activates active balancing when rapid equalization is needed and switches to passive balancing when cells are closer to equilibrium, optimizing both speed and energy efficiency while simplifying control logic.
3Reliability
If balancing resistance is used for active balancing, then cell voltage equalization is achieved, but economic efficiency deteriorates
Solution Approach 1:
The patent enables the balancing resistance to serve itself by utilizing the heat it generates for thermal management purposes. This self-service approach eliminates the need for separate heating components and reduces overall system cost, making the use of balancing resistance for active balancing more economically viable.
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 enables efficient, stable, and economical management of battery cells by maintaining optimal temperature ranges, reducing waste, and optimizing charging and discharging processes.
Implementation Method 1
a resistance means applied to a PCB in a laminated state as a current management means to consume or utilize current bypassed in a state in which the switch is on
Implementation Method 2
heat dissipation mechanisms, to stabilize temperature and balance battery cells
Data Source
AI summary
The present disclosure relates to a battery management system for energy control and, more specifically, to a battery management system for controlling energy by stably managing, using a new current management means, battery conditions that change due to internal or external factors during the charging and discharging process of a battery cell, so as to enable optimized charging and discharging of the battery cell.