Battery Cell Group Powering for Low-EMI Battery Management
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Solution Overview
Problem
Existing battery management systems require components for voltage drop to supply the operating voltage, leading to potential electromagnetic interference, increased power consumption, and the need for additional components for voltage stabilization.
Innovation Solution
The battery apparatus groups battery cells into multiple groups, allowing the battery management system to select a group to supply the operating voltage directly to the system, eliminating the need for voltage drop components by connecting the appropriate battery cell group wires to the system's ground and voltage supply terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a power supply with voltage higher than operating voltage (e.g., 12V to 5V) is used to supply power to the battery management system, then power supply capability is improved, but electromagnetic interference occurs in the DC/DC converter
Solution Approach 1:
The patent extracts and removes the DC/DC converter from the power supply path by directly connecting battery cell groups to the operating voltage terminals, eliminating the source of electromagnetic interference while maintaining power supply capability
Solution Approach 2:
The patent introduces battery cell groups as intermediary elements between the power supply and operating device, selecting specific groups to provide the required operating voltage without needing voltage conversion components
2Stability of the object's composition
If a voltage lowering component (e.g., LDO regulator) is used to reduce voltage from power supply to operating voltage, then voltage stabilization is improved, but power consumption increases
Solution Approach 1:
The patent enables the battery system to self-regulate voltage by selecting appropriate battery cell groups that naturally provide the required operating voltage, eliminating the need for power-consuming voltage regulation components
Solution Approach 2:
The patent implements dynamic selection of battery cell groups based on their instantaneous voltage states, allowing the system to adaptively provide stable operating voltage without fixed voltage regulation hardware
3Power
If a voltage lowering component is used to reduce voltage from power supply to operating voltage, then voltage conversion is achieved, but additional components for voltage stabilization are required
Solution Approach 1:
The patent removes voltage lowering components and additional stabilization components from the system by directly utilizing battery cell groups as voltage sources, simplifying the overall device structure
Solution Approach 2:
The patent makes battery cell groups serve multiple functions: they provide both power supply and voltage stabilization by selecting groups with appropriate voltage characteristics, eliminating the need for separate voltage regulation components
Data Source
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AI summary
A battery apparatus including a first battery pack for providing a first voltage, a battery management system for managing the first battery pack, and a second battery pack for providing a second voltage lower than the first voltage is provided. The second battery pack includes a plurality of battery cells, and the battery management system selects a battery cell group including a predetermined number of battery cells from among the plurality of battery cells of the second battery pack. The selected battery cell group supplies an operating voltage to an operating device of the battery management system.