Battery Protection via Surface Pressure Sensing
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Solution Overview
Problem
Conventional battery protection methods fail to address safety hazards such as external forces and internal expansion due to heat, which can lead to battery damage or explosion, even when there is no current or voltage input/output.
Innovation Solution
Incorporating pressure sensors on the battery surface and a controller to detect pressure parameters and generate control instructions based on predefined threshold values, triggering alerts, sleep states, or permanent failure to protect the battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional current and voltage detection methods are used for battery protection, then the protection circuit can cut off charging or electricity supplying circuits when current or voltage limits are exceeded, but the battery remains vulnerable to damage from external forces and internal expansion due to heat
Solution Approach 1:
A pressure sensor is introduced as an intermediary detection element between the battery and the controller. The pressure sensor detects pressure changes on the battery surface caused by external forces or internal expansion, and transmits this information to the controller, which then triggers appropriate protection actions. This intermediary mechanism enables detection of harmful factors that were previously undetectable by conventional current and voltage sensors alone.
2Reliability
If pressure sensors are added to detect external forces and internal expansion, then the battery protection capability against physical damage is improved, but the device complexity increases
Solution Approach 1:
The pressure sensor serves multiple functions: it detects both external forces applied to the battery and internal expansion caused by heat. A single pressure sensor replaces what would otherwise require multiple separate detection mechanisms, thereby improving protection capability while minimizing the increase in device complexity.
Solution Approach 2:
The patent combines the pressure detection function with the existing battery protection control system. The pressure sensor is electrically connected to the controller, which integrates the pressure information with other battery parameters to make comprehensive protection decisions. This merging approach allows the new pressure detection capability to work synergistically with existing protection mechanisms.
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 effectively mitigates safety hazards by providing progressive protection levels, alerting users to potential issues, managing battery states, and preventing damage through controlled responses to pressure changes.
Implementation Method 1
at least one pressure sensor provided on a surface of the battery... The at least one pressure sensor samples a pressure parameter on the surface of the battery
Data Source
AI summary
An electronic apparatus is provided. The electronic apparatus includes: a battery; at least one pressure sensor provided on a surface of the battery; and a controller electrically connected with the at least one pressure sensor. The at least one pressure sensor samples a pressure parameter on the surface of the battery. The controller acquires the pressure parameter, detects a magnitude relation between the pressure parameter and a predefined threshold value, and generates a control instruction for protecting the battery based on the detected magnitude relation.