Low-Voltage Lithium Battery PCB for Cable-Free Connections
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Solution Overview
Problem
Existing low-voltage lithium batteries face issues with unreasonable structure and low stability, making industrialization difficult.
Innovation Solution
A low-voltage lithium battery design featuring a circuit assembly with a PCB, conductive caps, and copper rings for electrical connections, along with a simplified internal structure and protective elements, enabling stable voltage output and same-port charge/discharge functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a voltage drop circuit board is used to convert high voltage to low voltage, then voltage conversion is achieved, but structural complexity increases and electrical stability decreases
Solution Approach 1:
The patent merges the voltage drop circuit, charging circuit, and control circuit into a single integrated circuit board that serves multiple functions simultaneously. This integration reduces the number of separate components and connections needed, thereby simplifying the overall structure while maintaining voltage conversion capability and improving electrical stability through unified circuit design.
Solution Approach 2:
The circuit board is designed with multi-functionality, serving as both a voltage drop circuit for converting high voltage to low voltage and a charging circuit for battery management. This universal design eliminates the need for separate dedicated circuits, reducing structural complexity while achieving adaptability for different operational modes.
2Ease of operation
If conductive cables are used for internal connections, then electrical connections are established, but reliability decreases due to potential connection issues
Solution Approach 1:
The patent extracts and eliminates conductive cables from the internal connection system by implementing direct soldered connections between the circuit board and battery terminals. This removal of intermediate cable components eliminates potential connection failure points, thereby improving reliability while maintaining ease of electrical connection establishment through direct bonding.
3Ease of manufacture
If a detailed assembly structure is not disclosed, then manufacturing flexibility is maintained, but industrialization becomes difficult
Solution Approach 1:
The patent segments the battery assembly into distinct modular components including the circuit board assembly, battery cells, housing, and protective elements. Each segment is designed with standardized interfaces and clear assembly sequences, enabling flexible manufacturing while facilitating efficient large-scale production through modular assembly processes.
Data Source
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AI summary
The present application relates to a low-voltage lithium battery, including a circuit assembly, a middle plastic frame, a wound battery core assembly, a metal housing and an insulating sheath, wherein the circuit assembly includes a PCB, an outer conductive cap and an inner conductive cap, a front surface of the PCB is provided with a positive copper ring and a negative copper ring, the positive copper ring is electrically connected with the outer conductive cap, the negative copper ring is electrically connected with the metal housing, a back surface of the PCB is provided with a high-voltage input copper ring, the high-voltage input copper ring is electrically connected with the inner conductive cap, a positive tab of the wound battery core assembly is electrically connected with the inner conductive cap, and a negative tab is electrically connected with the metal housing. By arranging the positive copper ring, the negative copper ring and the high-voltage input copper ring on the PCB, circuit connection of the wound battery core assembly and the PCB and circuit connection of a low-voltage output element and the PCB are realized, conductive cables are avoided, stability of an electrical performance is higher, an internal connection structure of the lithium battery is simplified, safety is higher, and industrialization can be realized.