Battery Pack Discharge Capacity Updating for Load State Control
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Solution Overview
Problem
Existing battery packs face issues where the provided discharge capacity parameter does not accurately reflect the actual discharge capacity, leading to either overloading or underutilization, affecting the battery life and performance.
Innovation Solution
A battery pack with a control unit that dynamically updates and transmits the discharge capacity parameter based on real-time electrical parameters, ensuring the power tool operates within the battery's capacity, preventing overload and optimizing discharge performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery pack transmits a parameter representing discharge capacity to the power tool, then the power tool can operate according to the battery pack's capacity, but if the parameter does not accurately reflect the actual discharge capacity, the battery pack may operate in an overloaded state or cannot exert optimal power supply capacity
Solution Approach 1:
The control unit continuously monitors the actual discharge capacity of the battery pack and dynamically updates the transmitted parameter based on real-time battery status. This feedback mechanism ensures the parameter accurately reflects the actual discharge capacity, preventing overloaded operation while maximizing power supply capability.
Solution Approach 2:
The discharge capacity parameter is transformed from a static value to a dynamic parameter that automatically adjusts according to the battery pack's actual state. The control unit modifies the transmitted parameter in real-time based on discharge progress, temperature, and other operational factors, ensuring optimal power tool performance throughout the battery's discharge cycle.
2Adaptability or versatility
If the battery pack provides a fixed discharge capacity parameter, then the device complexity is reduced, but the battery pack cannot adapt to changing discharge conditions, affecting service life and performance
Solution Approach 1:
The control unit implements a feedback loop that continuously monitors battery parameters such as voltage, current, and temperature, and dynamically adjusts the discharge capacity parameter transmitted to the power tool. This enables the battery pack to adapt to changing discharge conditions while maintaining manageable system complexity through integrated control circuitry.
Data Source
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AI summary
A battery pack includes a plurality of cells, a first detection unit configured to detect a first electrical parameter of a cell, a second detection unit configured to detect a second electrical parameter of a cell group, a storage unit at least configured to store a third electrical parameter of the cell, and a control unit at least electrically connected to the first detection unit, the second detection unit, and the storage unit. The control unit is configured to acquire the first electrical parameter, the second electrical parameter, and the third electrical parameter of the cell, dynamically adjust a discharge capacity parameter of the battery pack based on the third electrical parameter of the cell, the first electrical parameter, and the second electrical parameter, and transmit the discharge capacity parameter to a load end connected to the battery pack to enable the load to adjust the current operating state based on the discharge capacity parameter. The dynamic update of the discharge capacity parameter of the battery pack may enable the load to adjust the operating state timely in different discharge capacities of the battery pack so that the battery pack constantly supplies power to the load within the range of the power supply capacity of the battery pack, guaranteeing the life of the battery pack and the discharge performance of the battery pack.