Discharge Control Device for Energy Storage Overheating Prevention
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Solution Overview
Problem
Energy storage devices, such as lithium ion batteries, face overheating issues due to unexpected usage forms and states, leading to degraded performance and inefficient charging and discharging, which existing techniques struggle to prevent effectively.
Innovation Solution
A discharge control device that includes a first determination unit to detect deviations in the status of an electric apparatus, initiating discharge in energy storage devices before overheating occurs, and a second determination unit to stop discharge when the status returns to a safe range or a stop command is received, using acceleration and shock sensors to predict potential accidents like collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional techniques cause electrical short-circuit between electrode and can to prevent overheating, then overheating is prevented, but device complexity increases and reliability decreases due to potential damage to energy storage devices
Solution Approach 1:
The discharge control device initiates discharge control before an accident actually occurs by detecting status changes that indicate potential accidents (such as abnormal acceleration or shock patterns). This preliminary action prevents overheating by activating discharge control in advance, avoiding the need for emergency short-circuiting that could damage the energy storage device.
Solution Approach 2:
The system applies preliminary anti-action by detecting status deviations that precede accidents and activating discharge control to counteract potential overheating before it occurs. This prevents the harmful effect of overheating without resorting to destructive short-circuiting, thereby maintaining device reliability.
2Temperature
If discharge control is initiated before accidents occur, then overheating is suppressed, but device complexity increases due to additional determination units and sensors
Solution Approach 1:
The discharge control device utilizes the existing status detection capabilities of the electric apparatus (such as acceleration sensors already present in vehicles for other purposes) to detect status changes indicating potential accidents. By repurposing existing sensors and status information for discharge control, the system avoids adding significant complexity while achieving effective overheating suppression.
Solution Approach 2:
The determination unit leverages status information that is already being monitored by the electric apparatus for its normal operation. By using this existing status data to trigger discharge control, the system enables self-service functionality without requiring entirely new detection mechanisms, thereby limiting the increase in device complexity.
3Reliability
If discharge control continuously operates to prevent overheating, then safety is improved, but energy efficiency decreases due to unnecessary discharge
Solution Approach 1:
The discharge control device dynamically adjusts its operation based on real-time status detection. Discharge control is activated only when status changes indicate a potential accident is occurring, and deactivated when the status returns to normal or a different safe status is detected. This dynamic control ensures safety while avoiding unnecessary continuous discharge that would waste energy.
Solution Approach 2:
The system employs periodic status monitoring and conditional discharge control activation. Rather than continuous discharge, the control operates periodically based on status changes, activating discharge control only during periods when status indicates potential accident risk, and deactivating when status returns to safe ranges. This periodic action maintains safety while minimizing energy loss.
Data Source
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AI summary
A discharge control device (100) for controlling discharge in an energy storage device disposed in an electric apparatus (1), wherein the discharge control device includes a first determination unit (120) adapted to determine whether or not an electric apparatus's status is being outside a predetermined first range and a discharge controller (160) adapted to start discharge in the energy storage device, when the first determination unit determines that the status of the electric apparatus is being outside the first range.