Battery Pack Charging Interface for Li-Ion Retrofit Compatibility
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Solution Overview
Problem
Existing battery pack systems require significant modifications to wireless devices and charging devices to accommodate lithium-ion battery packs, which is not feasible with existing lead-acid battery pack systems.
Innovation Solution
A battery pack charging system that allows the use of lithium-ion battery packs without significant modification of related parts, utilizing a charging device, a battery pack, and a controller to share signals through PWM methods and CAN communication protocols, enabling efficient charge management and state information sharing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If lithium-ion battery packs are applied to existing wireless devices, then battery performance and energy density are improved, but significant modification of wireless devices and charging devices is required
Solution Approach 1:
A charging device is introduced as an intermediary component between the lithium-ion battery pack and the existing wireless device. The charging device includes a controller that generates standardized signals (first signal to battery pack, second signal to wireless device) to bridge the interface differences between lithium-ion batteries and existing lead-acid battery systems, enabling compatibility without modifying the wireless device structure
Solution Approach 2:
The charging device is designed with multi-functionality to handle both the battery pack interface and the wireless device interface. It can receive charging requests from the wireless device, communicate with the lithium-ion battery pack using PWM methods, and provide power management functions, thereby serving multiple purposes with a single device
2Ease of operation
If lead-acid battery pack systems are used, then existing wireless devices can operate without modification, but lithium-ion battery packs cannot be utilized
Solution Approach 1:
The system uses parameter changes in signal characteristics to accommodate different battery types. The charging device changes the parameters of control signals (PWM duty cycle, frequency, waveform patterns) based on the battery pack type detected, allowing the same hardware interface to work with both lead-acid and lithium-ion battery packs through software-controlled parameter adjustment
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
Enables the use of lithium-ion battery packs in existing lead-acid battery pack systems without significant modification, facilitating efficient charge management and state information sharing between the controller and battery pack, thus supporting seamless integration.
Implementation Method 1
The battery pack may generate the first signal based on the state of charge of the battery pack by a pulse width modulation (PWM) method.
Data Source
AI summary
Provided is a battery pack charging system including a charging device configured to receive a first signal from a battery pack and determine a charge condition of the battery pack based on the first signal; a battery pack configured to generate the first signal based on a state of charge of the battery pack and transmit the first signal to the charging device; and a controller configured to receive a second signal from the charging device and transmit the second signal to the battery pack.