Power Storage Unit Control Device for Vehicle Backup Power
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Solution Overview
Problem
In vehicle power source systems, existing technologies fail to effectively control the discharge of power storage units, leading to unnecessary power consumption and risk of electric shock during maintenance when the main power source is removed or in an anomalous state.
Innovation Solution
A power storage unit control device that includes a discharging circuit, a control unit, and a switching unit to monitor voltages and switch between discharge permission and prohibition modes based on vehicle operation states, ensuring discharging only occurs when necessary and preventing discharge during vehicle operation stoppage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power storage unit is always placed in the discharge state when the output of the main power source drops, then the power storage unit can serve as a backup power source, but it will enter discharge state even during maintenance when the vehicle is stopped, causing unnecessary power consumption and risk of electric shock
Solution Approach 1:
The system dynamically adjusts the discharge state of the power storage unit based on real-time monitoring of the main power source output and vehicle operation status. When the vehicle is operating and the main power source output drops below a threshold, the power storage unit enters discharge state to provide backup power. When the vehicle is stopped (maintenance mode), the system prohibits discharge even if the main power source output is low, preventing unnecessary power consumption and safety hazards.
Solution Approach 2:
The control device changes the operational parameters of the power storage unit based on vehicle state. A key parameter change is the discharge permission flag: set to true during vehicle operation when main power source output drops, and set to false during vehicle stoppage regardless of main power source output level. This parameter change enables the system to respond appropriately to different operational contexts.
2Reliability
If the power storage unit discharges when the main power source output is low, then power supply continuity is maintained, but electric shock risk occurs during maintenance when the main power source is removed
Solution Approach 1:
The control device acts as an intermediary between the main power source monitoring system and the power storage unit discharge control. It monitors both the main power source output and the vehicle operation state, then mediates the discharge decision by introducing a discharge permission mechanism. This intermediary function ensures that discharge only occurs when both conditions are met: main power source output is insufficient AND vehicle is in operation mode, thereby eliminating electric shock risk during maintenance while maintaining power supply continuity during normal operation.
3Reliability
If the system monitors main power source output to control discharge, then backup power supply is enabled, but the system cannot distinguish between operational stoppage and maintenance removal
Solution Approach 1:
The control system segments the discharge control logic into two independent monitoring channels: one for main power source output level and another for vehicle operation state. By separating these monitoring functions, the system can independently evaluate each condition and combine them through logical AND operation to make discharge decisions. This segmentation enables the system to distinguish between operational stoppage (where discharge should be permitted if power is needed) and maintenance removal (where discharge should be prohibited), enhancing context recognition capability.
Data Source
AI summary
A power storage unit control device includes a discharging circuit that discharges from a power storage unit to a load, a control circuit that controls the discharging circuit, and a switching unit that executes a discharge prohibition mode in which discharge control of the discharging circuit by the control circuit is prohibited, if a stop signal based on an operation stopped state of a vehicle is received and a power source unit is greater than or equal to a predetermined voltage, and executes a discharge permission mode in which discharge control of the discharging circuit by the control circuit is permitted, if an operation signal based on the operating state of the vehicle is received and the power source unit is greater than or equal to the predetermined voltage.