Battery Parallel Control Circuit for Busbar Overcurrent Limiting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In battery parallel systems, high currents on connection lines between batteries and busbars lead to overcurrent operations, reducing the service life and reliability of energy storage batteries.
Innovation Solution
A control circuit with an acquisition unit, control unit, and current-limiting circuit is introduced between batteries and busbars to monitor and adjust currents, ensuring they remain within a preset threshold, thereby preventing overcurrent conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If batteries operate in parallel to increase total energy storage capacity, then the energy storage capacity increases, but the current on connection lines becomes too high causing overcurrent operation
Solution Approach 1:
The patent introduces a current-limiting circuit as an intermediary component between the battery and busbar. This circuit includes switching elements and control units that actively regulate the current flow, preventing excessive current from reaching the battery while still allowing the parallel configuration to provide increased energy storage capacity.
Solution Approach 2:
The patent dynamically changes the electrical parameters (current limits) based on real-time monitoring. The control unit adjusts the current threshold parameters adaptively, allowing the system to optimize between energy storage utilization and battery protection depending on operating conditions such as charging/discharging states and temperature.
2Productivity
If high current flows through connection lines in battery parallel systems, then energy transmission efficiency increases, but the service life of batteries decreases due to overcurrent operation
Solution Approach 1:
The patent implements a feedback control mechanism where sensors continuously monitor the current flowing through the connection lines and battery parameters. The control unit receives this feedback and dynamically adjusts the current-limiting circuit's switching elements to maintain current within safe thresholds, thereby protecting battery service life while maximizing allowable energy transmission.
Solution Approach 2:
The current-limiting circuit employs dynamic switching elements (such as MOSFETs or IGBTs) that can rapidly adjust their resistance characteristics in real-time. This dynamic adjustment allows the system to optimize current flow for energy transmission efficiency while preventing overcurrent conditions that would reduce battery service life.
3Device complexity
If no current limiting control is implemented, then the circuit structure remains simple, but the battery operates in overcurrent state resulting in short service life
Solution Approach 1:
The patent segments the current path into controllable sections by inserting the current-limiting circuit with switching elements. This segmentation allows independent control of current flow in different parts of the circuit, enabling protection of the battery while maintaining relatively simple overall system architecture through modular design.
Data Source
AI summary
Provided are a control circuit (100), a circuit board assembly, and a battery (200) parallel system. The control circuit (100) is disposed between a battery (200) and a busbar (300), and the control circuit (100) comprises an acquisition unit (1), a control unit (2), and a current-limiting circuit (3). The control unit (2) is used to start timing when the current of a positive electrode of the battery (200) is greater than a preset threshold, and after the duration of the voltage of the positive electrode of the battery (200) greater than a first preset threshold is greater than a preset time, reduces the current of the positive electrode of the battery (200) by means of controlling the current-limiting circuit (3), until the current of the positive electrode of the battery (200) is less than or equal to the preset threshold.