Composite Battery Tab Circuit for Smaller Protection Boards

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Solution Overview

Problem

The battery life of electronic devices is affected due to relatively small battery capacity, which is a result of the large size of the protection board required for effective overcurrent protection.

Innovation Solution

A battery design that includes a connecting member with two connecting tabs, where one tab is connected to form a composite tab, allowing for two parallel current loops with the protection board assembly, reducing the current magnitude in each loop and minimizing the protection board size, thereby increasing the battery capacity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the protection board size is increased to achieve effective overcurrent protection, then the protection effect is improved, but the battery capacity is reduced

Engineering Contradiction:

Improveovercurrent protection effectVSAvoidbattery capacity

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent divides the single current loop into two parallel current loops by adding a connecting member with two connecting tabs. This segmentation allows the protection board to be smaller while maintaining protection effectiveness, as each loop carries only portion of the total current.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a new structural dimension by adding the connecting member that creates parallel current paths. This dimensional change in the circuit topology enables current distribution across multiple paths, reducing the burden on the protection board.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Duration of action of moving object

If the protection board size is reduced to increase battery capacity, then the battery life is improved, but the overcurrent protection effect is weakened

Engineering Contradiction:

Improvebattery lifeVSAvoidovercurrent protection effect

Core Design Contradiction:

Duration of action of moving objectVSReliability

Solution Approach 1:

By segmenting the current path into two parallel loops, the patent enables the protection board to handle reduced current magnitude while maintaining adequate protection capability. This segmentation allows for a smaller protection board that still provides reliable protection.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the electrical parameter distribution by creating parallel current paths, which alters the current magnitude in each loop. This parameter change allows the protection board to be sized for lower current while the overall system maintains protection for the full battery capacity.

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If a single current loop configuration is used, then the structure is simple, but the protection board size must be large

Engineering Contradiction:

Improvestructure simplicityVSAvoidprotection board size

Core Design Contradiction:

Device complexityVSArea of stationary object

Solution Approach 1:

The patent segments the current loop into two parallel paths using a connecting member with two connecting tabs. This segmentation reduces the current magnitude in each individual loop, allowing for a smaller protection board while adding only minimal structural complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent merges the battery tabs with the connecting tabs to form composite tabs, creating an integrated structure. This merging approach maintains structural simplicity while enabling the parallel current path configuration that reduces protection board size.

Inventive Principle:

Principle #5Merging (Combining)

4Quantity of substance

If the battery accommodating size is increased, then the battery capacity is improved, but the protection board occupies more space

Engineering Contradiction:

Improvebattery capacityVSAvoidprotection board assembly volume

Core Design Contradiction:

Quantity of substanceVSVolume of stationary object

Solution Approach 1:

By segmenting the current into two parallel loops, the patent reduces the current handling requirement of the protection board, enabling a smaller protection board assembly volume. This frees up space that can be allocated to increasing battery capacity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent uses dimensional change in the circuit topology by introducing parallel current paths, which reduces the power handling requirements of the protection board. This dimensional restructuring allows for compact protection board design that accommodates larger battery cells.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS20250046966A1Battery and electronic device

Publication Date: 2025.02.06 ZHUHAI COSMX POWER CO LTD

AI summary

Provided are a battery and an electronic device. The battery includes a battery cell, a connecting member, and a protection board assembly. The battery cell includes a battery cell body and two tabs connected to the battery cell body. The connecting member includes two connecting tabs and a connecting portion connecting the two connecting tabs, where one of the connecting tabs is connected to and electrically conducted with one of the tabs, to form a composite tab; the composite tab and the other one of the tabs are both connected to the protection board assembly to form a first loop; and the other one of the connecting tabs and the other one of the tabs are both connected to the protection board assembly to form a second loop.