Hybrid Battery Module with Current Limiting Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lithium batteries occupy a large volume in mobile devices, limiting usage time, while paper batteries have lower energy density and different charging/discharging abilities, making concurrent use challenging without damaging the device.
Innovation Solution
A battery module with a lithium battery as the primary source and a paper battery as an auxiliary source, connected in parallel with a current limiting circuit to restrict current flow according to thresholds, ensuring safe charging and discharging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a lithium battery with larger capacity is applied to extend usage time, then the usage time of the mobile device is improved, but the dimension of the mobile device will increase
Solution Approach 1:
The battery system is segmented into two distinct battery types: a lithium battery serving as the primary power source and a paper battery serving as the auxiliary power source. This segmentation allows the system to achieve extended usage time through the combined capacity of both batteries while maintaining a compact form factor, as the paper battery can be integrated into the device's existing structure without requiring a large volume increase.
2Quantity of substance
If the conventional parallel connection method is applied to connect lithium battery and paper battery, then the overall capacity is improved, but the paper battery will be damaged
Solution Approach 1:
A current limiting circuit is introduced as an intermediary component between the paper battery and the parallel connection system. This circuit actively monitors and regulates the current flowing to the paper battery, preventing excessive current that would cause damage. The intermediary circuit enables the system to safely utilize the combined capacity of both batteries while protecting the paper battery's integrity through active current management.
Solution Approach 2:
The system dynamically adjusts the operating parameters of the paper battery by implementing current limiting through the current limiting circuit. By controlling the current parameter to remain within safe thresholds, the system enables the paper battery to contribute to the overall capacity without exceeding its operational limits, thus preventing damage while maximizing utility.
3Volume of moving object
If a paper battery is used to reduce device volume, then the flexibility and disposability are improved, but the energy density is lower than lithium battery
Solution Approach 1:
The system merges the advantages of both battery types by combining the lithium battery's high energy density with the paper battery's flexibility and compact form factor. The lithium battery provides the majority of the energy capacity, while the paper battery supplements the total capacity and offers flexible integration options that can reduce overall device volume. Together, they create a hybrid power system that achieves both compactness and adequate energy supply.
Data Source
AI summary
A battery module including a connection terminal, a first battery, a second battery and a current limiting circuit is provided. The connection terminal serves as a power input terminal of the battery module during the charging of the battery module, and serves as a power output terminal of the battery module during the discharging of the battery module. The first battery is coupled to the connection terminal, and serves as a primary power source of a mobile device. The second battery serves as an auxiliary power source of the mobile device. The current limiting circuit is coupled between the second battery and the connection terminal, and restricts the magnitudes of the currents flowing into and out of the second battery according to a charging current threshold and a discharging current threshold.