Battery Sealing Body Integrating Circuit Board and Charging Indicator
Solution Overview
Problem
Lithium-ion secondary batteries suffer from low energy density and capacity due to low space utilization in polymer battery cells, which is exacerbated by the need for separate packaging and connection with integrated circuit chips, leading to increased volume and cost.
Innovation Solution
A secondary electrochemical battery sealing body with a charging indicator that includes a negative electrode cap, a circuit board module, and an insulating washer, where the charging indicator is exposed through a notch in the cap and the washer allows light transmission, enabling visible charging status and optimizing space usage by integrating the circuit board within the battery case.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery cell top seal occupies a certain height of the polymer battery cell, then the sealing function is achieved, but the usable space inside the polymer battery cell is reduced
Solution Approach 1:
The sealing body integrates multiple components (negative electrode cap, circuit board module, insulating washer, charging indicator) into a single assembled unit that performs both sealing and additional functions (charging indication, circuit integration), thereby reducing the need for separate components and optimizing space utilization while maintaining reliable sealing
2Ease of manufacture
If the rechargeable batteries are packaged separately from the integrated circuit chips, then the manufacturing and assembly processes are simplified, but the product volume increases and cost increases
Solution Approach 1:
The circuit board module is integrated within the sealing body structure itself, combining the sealing function with the circuit board housing function. This eliminates the need for separate packaging of batteries and circuit chips, reducing overall product volume while maintaining manufacturing simplicity through modular assembly
Solution Approach 2:
The circuit board module is nested within the sealing body structure, with the circuit board housed inside the negative electrode cap assembly. This nested arrangement allows the circuit board to occupy space that would otherwise be structural, thereby reducing overall product volume without complicating the manufacturing process
3Ease of manufacture
If the rechargeable batteries are packaged separately from the integrated circuit chips, then the assembly process is simplified, but the number of peripheral components increases
Solution Approach 1:
The sealing body integrates multiple previously separate components (negative electrode cap, circuit board housing, insulating elements, charging indicator housing) into a single assembled unit, reducing the number of peripheral components while maintaining ease of manufacture through modular assembly of the integrated unit
4Illumination intensity
If the notch in the negative electrode cap is made deeper, then the charging indicator is more exposed and visible, but the structural integrity of the cap is reduced
Solution Approach 1:
The notch is designed with specific dimensional characteristics (certain height but not higher than the negative electrode cap) that provide sufficient light transmission for charging indicator visibility while maintaining adequate structural integrity of the cap. The local geometry is optimized to balance optical function with mechanical strength
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 solution enhances space utilization within the battery cell, improving energy density and capacity while providing a visible charging indicator for user feedback, thus addressing the limitations of existing battery designs.
Implementation Method 1
the insulating washer are made of a transparent light guiding material, so that light emitted by the charging indicator passes through the insulating washer, and the entire insulating washer is enabled to transmit the light
Data Source
Figure 1a~1c
Figure 2a~2b
Figure 2c
AI summary
Disclosed is a secondary electrochemical battery sealing body with a charge indicating lamp. The secondary electrochemical battery sealing body comprises: a cathode cap, a circuit board module and an insulating gasket. The cathode cap is located on the outermost side of the battery sealing body. The circuit board module is located on the inner side of the cathode cap and is connected to the cathode cap via a connecting member. The charge indicating lamp is arranged on the circuit board module at the position corresponding to an edge of the cathode cap. The part where the cathode cap is connected to the circuit board module is of a "C"-shaped annular structure. That is to say, a notch is formed in the edge of the cathode cap. The notch serves as a light-pervious port of the charge indicating lamp. The notch has a certain height which does not exceed the height of the cathode cap, and the position of the notch corresponds to the position of the charge indicating lamp on the circuit board module. The insulating gasket is a flexible and elastic annular insulating cushion layer, and is arranged in a gap between a battery housing, the circuit board module and the cathode cap. The insulating gasket further completely covers the light-pervious port of the charge indicating lamp to seal the cathode cap, the battery housing and the circuit board module, and the insulating gasket is made of a transparent light-transmitting material.