Float Charging Controller for Battery Life Extension
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Solution Overview
Problem
Conventional battery charging methods often lead to overcharging, which can damage energy storage devices, and existing systems fail to maximize the operational life of energy storage systems in welding-type power supplies.
Innovation Solution
A hybrid welding-type power system that includes an engine-driven electric generator and an energy storage device, with a controller managing the charging process using sensors to monitor parameters like voltage, temperature, and discharge cycles, employing a float charger to maintain the battery at a full capacity without overcharging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional battery charging methods are used, then charging speed is improved, but overcharging occurs which damages the energy storage device
Solution Approach 1:
The controller continuously monitors the charge level of the energy storage device and adjusts the charging current accordingly. When the battery reaches full charge, the controller automatically reduces or stops the charging current to prevent overcharging, thus resolving the contradiction between fast charging and device safety
Solution Approach 2:
The charging system dynamically adjusts its operation mode based on real-time battery status. The controller modifies charging parameters (current, voltage) during the charging process to optimize both charging speed and battery protection, transitioning from constant current charging to tapered charging as the battery approaches full capacity
2Duration of action of stationary object
If float charging is implemented to prevent overcharging, then energy storage device lifetime is extended, but charging control complexity increases
Solution Approach 1:
The energy storage device itself provides feedback signals (voltage, current, temperature) that the controller uses to automatically adjust charging parameters. The system serves itself by using the battery's own characteristics to determine when to modify or stop charging, reducing the need for external monitoring complexity
Solution Approach 2:
The controller changes charging parameters (current magnitude, voltage level) based on detected battery state. By dynamically adjusting these parameters rather than using fixed charging rates, the system extends battery life while keeping the control logic relatively simple through parameter modulation
3Measurement precision
If multiple sensors are added to monitor charge level parameters, then charging precision is improved, but system complexity and cost increase
Solution Approach 1:
The controller performs multiple functions using the same sensor inputs: it monitors charge level, detects temperature, measures current, and tracks voltage simultaneously. This multi-functional approach allows precise charge level detection without adding separate dedicated sensors for each parameter, reducing overall system complexity
Solution Approach 2:
The patent combines multiple measurement functions (voltage sensing, current sensing, temperature monitoring) into a single integrated controller unit. By merging these functions rather than using separate standalone sensors and controllers, the system achieves high measurement precision while minimizing the number of discrete components
Data Source
AI summary
A welding-type power system that includes an engine configured to drive an electric generator to provide a first power output. In addition to the electric generator, the system includes an energy storage system to provide a second power output. The system includes energy storage devices and charging devices that are used to charge the energy storage devices. A controller is configured to control the charging devices to provide charging power output to the energy storage devices based on the parameters related to the charge level of the energy storage devices. The controller, using data received from sensors and charge measurement devices, determines the respective charge level for each energy storage device; compares the respective charge levels to one or more threshold charge levels; and controls the charging devices to provide a charging power output to the energy storage devices with a charge level that is below a threshold charge level.