Battery Cycle Counting via State Detection
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Solution Overview
Problem
Existing information processing devices with embedded secondary battery packs face challenges in evenly deteriorating and replacing batteries, as existing methods do not effectively determine the number of charge/discharge cycles for each battery pack, leading to uneven degradation.
Innovation Solution
An information processing device with a charge/discharge execution unit that selects a secondary battery pack based on detected charge/discharge cycles by monitoring fully-charged, intermediate, and near-zero states, allowing for equalization of battery degradation by determining the number of cycles through specific detection points and calculating an average value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If preferential charge/discharge is applied to the first battery, then the first battery is preferentially charged and discharged, but the first battery deteriorates more as compared with other batteries
Solution Approach 1:
The control unit pre-determines the number of charge/discharge cycles for each battery pack before actual operation. By establishing cycle allocation in advance based on total expected cycles and battery capacity ratios, the system prevents uneven deterioration before it occurs, ensuring all batteries reach similar degradation levels by the end of their service life
Solution Approach 2:
The system dynamically adjusts charge/discharge cycle allocation parameters based on battery capacity ratios. By changing the distribution parameters according to each battery's capacity characteristics, the control unit ensures that batteries with different capacities undergo proportional cycling, preventing any single battery from being overused and deteriorating faster than others
2Ease of operation
If the information processing device is an embedded device with embedded secondary battery packs, then the secondary battery packs cannot easily be removed and mounted, but it is desired in view of simple maintenance that the plurality of secondary battery packs become deteriorated at as close to the same level as possible
Solution Approach 1:
The control unit continuously monitors the number of charge/discharge cycles for each battery pack and uses this feedback information to adjust cycle allocation. By counting actual cycles and comparing them against target distributions, the system dynamically balances usage across all embedded batteries, ensuring they deteriorate at similar rates without requiring physical removal or manual intervention
Solution Approach 2:
The system pre-calculates the ideal cycle distribution among embedded batteries based on their capacities before operation begins. This preliminary allocation plan guides the control unit in distributing charge/discharge cycles evenly across all batteries, ensuring uniform deterioration and extending overall system lifespan without requiring complex maintenance operations
3Measurement precision
If the number of charge/discharge cycles is grasped by converting the observed voltage and current values into the number of cycles, then the CPU converts observed voltage and current values, but the specific method of determining the number of times of charge/discharge is not disclosed
Solution Approach 1:
The control unit autonomously counts charge/discharge cycles by monitoring its own control actions. Each time the control unit executes a charge or discharge operation, it increments the cycle counter for the affected battery pack. This self-service approach eliminates the need for complex external measurement systems or sophisticated algorithms to convert voltage and current data, providing accurate cycle counts through simple, direct counting of control operations
Data Source
AI summary
Provided is an information processing device capable of easily determining the number of times of charge/discharge of each of a plurality of secondary battery packs, the information processing device including a charge/discharge execution unit (21, 22, 23) having the following configuration. That is, the charge/discharge execution unit (21, 22, 23) determines the number of times of charge/discharge of each of a plurality of secondary battery packs (11, 12, 13) based on: the number of times a fully-charged state of the secondary battery pack is detected when the charge to the secondary battery pack is executed; the number of times an intermediate state in which the remaining capacity of the secondary battery pack becomes equal to a predetermined value between the maximum remaining capacity value in the fully-charged state and a remaining capacity of zero is detected when the discharge from the secondary battery pack is executed; and the number of times a remaining capacity near-zero state in which the remaining capacity of the secondary battery pack becomes equal to a near-zero value closer to the remaining capacity of zero than the predetermined value is detected when the discharge from the secondary battery pack is executed.