Battery Management Unit Charge Limiting for Storage Safety
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Solution Overview
Problem
Information handling systems with rechargeable batteries face degradation and safety issues when shipped fully charged, and manual processes to limit charging are error-prone and resource-intensive.
Innovation Solution
An automated battery management system (BMU) limits the rechargeable battery's charge to a specified percentage during storage and shipping by controlling voltage, using a BMU controller and driver code to enforce a charge limit until the system is powered on by the end user, after which it allows full charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual processes are used to limit battery charging during storage and shipping, then battery safety and longevity are improved, but labor resources increase and error rates worsen
Solution Approach 1:
The battery management system automatically monitors and limits battery charging during storage and shipping without requiring manual intervention. The system self-manages the charging limitation process through automated detection of storage/shipping states and enforcement of charge limits, eliminating the need for manual processes while maintaining battery safety.
Solution Approach 2:
The patent replaces manual mechanical processes (physically disconnecting chargers, monitoring battery levels) with an automated electronic control system. The BMU controller and associated software automatically enforce charging limits by controlling power delivery to the battery, substituting human labor with electronic automation.
2Ease of operation
If batteries are shipped fully charged, then device readiness is improved, but safety risks and battery degradation worsen
Solution Approach 1:
The system dynamically changes the battery charge parameter based on the operational state. During storage and shipping states, the system enforces a charge limit (e.g., 60-80% capacity) to reduce safety risks. When the system transitions to active use, the charge limit is removed or increased, allowing the battery to charge to full capacity for optimal device readiness.
Solution Approach 2:
The charging limitation is not static but dynamic, changing based on the system's operational state. The BMU controller continuously monitors whether the system is in storage, shipping, or active use mode and adjusts the charging behavior accordingly. This dynamic approach allows the system to balance safety during transit with readiness during use.
3Productivity
If automated battery management systems are implemented, then manual intervention is eliminated, but system complexity increases
Solution Approach 1:
The battery management system integrates multiple functions into a single unified controller. The BMU controller handles both normal charging operations and storage/shipping charge limitation, along with state detection and power management. This multi-functional integration reduces the need for separate dedicated components for each function, managing complexity through consolidation.
Solution Approach 2:
The system introduces a battery management unit (BMU) as an intermediary layer between the power source and the battery. This BMU acts as a mediator that intelligently controls power flow, enforces charge limits when needed, and manages the transition between different operational states. The intermediary handles the complexity of decision-making, keeping the overall system architecture manageable.
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
This solution protects battery longevity, reduces safety risks, and eliminates the need for manual intervention, ensuring batteries are not fully charged during storage and shipping while allowing full capacity charging upon user activation.
Implementation Method 1
the BMU controller to limit the voltage received by a portable battery such that a percentage value charge of the portable battery does not exceed a first set percentage value charge limit
Data Source
AI summary
An information handling system operating a BMU controller may include a rechargeable battery, a BMU controller to determine battery charge percentage value, a memory device for storage of an internal data record indicating a first power-on setting, and the controller operatively coupled to the memory memory device and the rechargeable battery. The controller executing machine-readable executable code instructions to determine that the main memory contains no internal data record indicating a first power-on event and to limit the voltage received by the rechargeable battery such that percentage value of the charge of the rechargeable battery does not exceed a set percentage value charge limit during storage and shipment of the information handling system. The controller also receiving machine-readable executable code instructions operable to record an internal data record in the memory device indicating a first power-on event when the processor and main memory of the information handling system are next powered on from an off state and upon storing the internal data record indicating a first power-on setting to remove the set percentage value charge limit and allow the rechargeable battery to charge to full capacity.