Battery Cell Balance Display for Post-Stop Voltage Variation
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Solution Overview
Problem
Operators of working machines are not able to recognize when balance processing is executed after the machine has stopped, leading to confusion as the processing occurs despite the machine being idle.
Innovation Solution
A control device with a power storage unit, balance processing unit, and control unit that executes balance processing when the load stops and generates a state image to indicate the degree of voltage variation, allowing operators to recognize the processing is occurring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If balance processing is executed after the load stops to reduce voltage variation, then battery cell balance is improved, but operator awareness and system transparency deteriorate
Solution Approach 1:
The control unit generates a state image displaying the degree of voltage variation among battery cells and outputs it to a display unit. This provides visual feedback to the operator about the balance processing state, resolving the information loss while maintaining the voltage balancing function.
Solution Approach 2:
A state image serves as an intermediary between the balance processing system and the operator. The image visually represents the voltage variation degree, bridging the gap between the technical processing and human understanding, thereby preventing information loss.
2Stability of the object's composition
If balance processing is executed after the load stops, then battery cell variation is reduced, but operator confusion increases due to lack of recognition
Solution Approach 1:
The display unit presents visual feedback showing the voltage variation degree among battery cells. This allows the operator to understand what is happening in the system, eliminating confusion while preserving the voltage stabilization function.
Solution Approach 2:
The state image uses visual representation (potentially with color variations) to indicate the degree of voltage variation. This makes the abstract electrical state comprehensible to the operator, improving ease of operation while maintaining battery cell stability.
Data Source
AI summary
A control device includes a power storage unit, a balance processing unit, and a control unit. The power storage unit includes a plurality of battery cells, and supplies power to a load. In a case where the load stops, the balance processing unit can execute balance processing of reducing variation in the voltage of each of the plurality of battery cells according to the degree of the variation in the voltage. The control unit generates, for display, a state image indicating the state of the variation according to the degree of the variation.