Integrated Circuit Board for Pouch Battery Temperature Sensing
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Solution Overview
Problem
The existing battery pack production processes are inefficient and costly due to the need for individual attachment of current interruption modules to each secondary battery, which can damage the pouch-type batteries and require additional insulation, complicating the assembly and increasing production time and costs, especially in large battery packs.
Innovation Solution
A circuit board for secondary batteries with integrated tab coupling portions, conductive plates, and a current interruption module that senses temperature and interrupts current, eliminating the need for separate attachment of current interruption modules to each battery and reducing the complexity of assembly by integrating the module onto the circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current interruption modules are individually attached to each secondary battery, then temperature sensing accuracy is improved, but production complexity and cost increase
Solution Approach 1:
The patent combines multiple current interruption modules and temperature sensing elements into a single integrated circuit board that serves multiple batteries simultaneously. This merging approach maintains temperature sensing accuracy for each battery while eliminating the need for individual module attachment, thereby reducing production complexity and cost.
Solution Approach 2:
The circuit board is designed as a universal platform that can simultaneously serve multiple secondary batteries with different configurations. The board integrates multiple TCO elements and temperature sensors that can monitor and protect multiple batteries through a single assembly process, enhancing both efficiency and accuracy.
2Measurement precision
If current interruption modules are individually attached to each secondary battery, then temperature sensing accuracy is improved, but production time increases
Solution Approach 1:
By merging multiple temperature sensing functions into a single circuit board assembly, the patent enables simultaneous attachment to multiple batteries in one operation. This eliminates repetitive individual attachment steps, significantly reducing production time while maintaining the ability to accurately sense temperature for each battery.
Solution Approach 2:
The circuit board is pre-configured with multiple TCO elements and temperature sensing elements in their final positions before attachment to the batteries. This preliminary preparation allows for rapid, bulk installation without requiring subsequent adjustments or individual positioning, thereby improving production efficiency.
3Measurement precision
If electrode tabs are bent to attach current interruption modules, then temperature sensing accuracy is improved, but battery damage risk increases
Solution Approach 1:
The patent introduces a dedicated circuit board as an intermediary component between the electrode tabs and the current interruption modules. This mediator provides a stable mounting platform that eliminates the need to bend electrode tabs, thereby reducing mechanical stress and damage risk to the batteries while maintaining accurate temperature sensing capability.
Solution Approach 2:
The circuit board structure is designed to cushion and distribute mechanical stresses before they can reach the delicate electrode tabs or battery components. By providing this protective intermediary layer, the system prevents damage that would otherwise occur during the attachment process.
4Measurement precision
If current interruption modules are attached close to secondary batteries, then temperature sensing accuracy is improved, but additional insulation requirements increase complexity
Solution Approach 1:
The circuit board is designed with uniform insulation properties across its entire surface, providing consistent electrical isolation between the TCO elements, temperature sensors, and battery components. This homogeneous insulation approach eliminates the need for additional localized insulation measures, simplifying the overall assembly while maintaining close proximity for accurate temperature sensing.
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 solution simplifies the production process, reduces costs, and enhances safety by allowing more accurate temperature sensing and current interruption, improving productivity and yield while preventing damage to batteries during assembly.
Implementation Method 1
a current interruption module having both ends respectively connected to the one pair of conductive plates, the current interruption module sensing a temperature of the secondary battery and interrupting a current according to the sensed temperature
Data Source
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AI summary
Disclosed is a circuit board for a secondary battery, which ensures an improved safety according to a temperature of the secondary battery, and a battery pack including the circuit board. The circuit board for a secondary battery, which is connected to at least one of a cathode tab and an anode tab of the secondary battery, includes a tab coupling portion connected to the cathode tab or the anode tab, a charging/discharging path connected to the tab coupling portion to give a path through which a charging current or a discharging current of the secondary battery flows, the charging/discharging path having at least one path cutting portion formed therein, one pair of conductive plates respectively attached to both ends of the path cutting portion, the conductive plates being at least partially bent, and a current interruption module having both ends respectively connected to the one pair of conductive plates, the current interruption module sensing a temperature of the secondary battery and interrupting a current according to the sensed temperature.