Battery Logic Circuit Access Control via Voltage Sampling
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Solution Overview
Problem
In rechargeable battery systems, different components such as chargers and devices can apply varying voltage levels, leading to interference or damage when accessing the logic circuit, and communication collisions occur when both attempt access simultaneously.
Innovation Solution
A method involving high and low side switches, along with pull-up and pull-down resistances, is used to control access to the logic circuit, allowing components to safely interact by sampling voltage levels and applying bias voltages to prevent interference and collisions, utilizing a single wire communication protocol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple components (charger and device) access the logic circuit simultaneously, then communication functionality is improved, but voltage interference and circuit damage occur
Solution Approach 1:
The system performs preliminary actions by setting switches to normally open or closed states and applying pull-up or pull-down resistances before communication occurs. This preliminary configuration establishes a default voltage state that prevents interference when multiple components attempt to access the logic circuit simultaneously.
Solution Approach 2:
The patent introduces intermediary elements including switches and resistances that mediate between multiple components and the logic circuit. These intermediaries control voltage levels and current flow, allowing multiple components to access the circuit without direct conflicting connections that would cause voltage interference.
2Productivity
If both components attempt to access the logic circuit at the same time, then communication efficiency is improved, but communication collisions occur
Solution Approach 1:
The system uses feedback mechanisms where components monitor the state of the logic circuit and adjust their access timing accordingly. The switches and resistances provide feedback about the current voltage state, allowing components to coordinate their access and avoid collisions while maintaining communication efficiency.
3Adaptability or versatility
If different voltage levels are applied to the logic circuit, then component flexibility is improved, but circuit damage risk increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting voltage levels through switches and resistances. The system can change the electrical parameters (voltage, current) based on which component is accessing the logic circuit, allowing different voltage levels to be applied safely without causing circuit damage.
Data Source
AI summary
A method and apparatus for controlling access to a logic circuit in a battery by one or more components connected to the battery includes the components initially providing no voltage to a data contact, and sampling a voltage level at the data contact to determine if another component is presently connected to the logic circuit. When the sampled voltage indicates no other component is presently accessing the logic circuit, the component applies a voltage to the logic circuit via the data contact and access the logic circuit. When the sampled voltage indicates that a prior-connected component is connected to the battery, the component uses a voltage level provided by the prior-connected component to access the logic circuit.