Storage Battery Charge-Discharge Timing Based on Degradation Rate
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing charge/discharge control systems for storage batteries in hybrid electric vehicles fail to determine the optimal timing for control based on the degradation state of the battery, leading to inefficient battery life management.
Innovation Solution
A storage battery control device that includes a battery information acquisition unit, a degradation progression rate calculation unit, a limit value calculation unit, a battery use state estimation unit, a correction permission determination unit, and a limit value correction unit, which together determine the appropriate timing for charge/discharge control by assessing battery health and usage patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If charge/discharge control is performed based on degradation rate comparison with reference values, then battery life can be extended, but the control timing cannot be determined optimally because the period until degradation state is affected by control state changes is not considered
Solution Approach 1:
The patent calculates the degradation progression rate in advance by monitoring battery usage patterns, temperature history, and charge/discharge cycles over time. This preliminary degradation assessment enables the system to determine optimal control timing before the degradation state actually changes, resolving the timing uncertainty in conventional approaches
Solution Approach 2:
The system continuously monitors battery degradation progression and uses this feedback to adjust charge/discharge control timing dynamically. By comparing actual degradation rates against predicted rates, the controller optimizes control timing to extend battery life while accounting for the time lag between control actions and their effects on degradation
2Ease of manufacture
If conventional charge/discharge control is implemented without considering degradation progression rate, then control implementation is simple, but battery life is not maximized due to inappropriate control timing
Solution Approach 1:
The patent introduces degradation progression rate as a new control parameter that changes over time based on battery usage patterns, temperature history, and charge/discharge cycles. This dynamic parameter enables sophisticated battery life management while maintaining relatively simple control logic through standardized calculation methods and lookup tables
Data Source
Figure 1
Figure 2
Figure 3
AI summary
To perform charge/discharge control of a storage battery at an appropriate timing. In a battery controller 107, a battery information acquisition unit 201 acquires information on the storage battery. A degradation progression rate calculation unit 202 calculates a degradation progression rate of the storage battery based on the information acquired by the battery information acquisition unit 201. A limit value setting unit 203 sets a limit value for controlling charge/discharge of the storage battery based on the degradation progression rate calculated by the degradation progression rate calculation unit 202. A timing determination unit 204 determines a timing at which the limit value needs to be output based on the information acquired by the battery information acquisition unit 201. A limit value output unit 205 outputs the limit value to a host controller 112 based on the timing determined by the timing determination unit 204.