Battery Formation Circuit With Auxiliary Voltage for Full Discharge
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Solution Overview
Problem
Existing battery formation apparatuses fail to ensure complete discharge of battery cells, leading to poor formation effects and inaccurate capacity detection due to insufficient input voltage for the DC-DC conversion module.
Innovation Solution
A battery formation apparatus with a control circuit that serially connects the low-voltage terminal of a DC-DC conversion module, the battery unit, and an additional power supply of the same polarity, increasing the input voltage to the DC-DC conversion module and allowing each battery cell to fully discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a battery unit discharges into the battery formation apparatus using only the first DC-DC conversion module, then the device complexity is reduced, but the input voltage to the DC-DC conversion module becomes insufficient, preventing complete discharge of battery cells
Solution Approach 1:
The additional power supply acts as an intermediary component that provides supplemental voltage during the discharge process. By introducing this intermediate voltage source, the system ensures that the input voltage to the DC-DC conversion module remains sufficient for complete battery cell discharge, thereby resolving the contradiction between discharge completeness and device complexity.
Solution Approach 2:
The control circuit dynamically switches between different circuit configurations based on the discharge state. During discharge, it serially connects the additional power supply with the battery unit to boost input voltage, while during charging, it uses only the first DC-DC conversion module. This dynamic reconfiguration allows the system to adapt to different operational requirements, ensuring complete discharge when needed while maintaining simplicity during charging.
2Manufacturing precision
If the additional power supply is serially connected during battery discharge, then the input voltage to the DC-DC conversion module increases enabling complete discharge, but the device complexity increases
Solution Approach 1:
The control circuit dynamically reconfigures the circuit topology based on operational mode. During discharge, it establishes a serial connection between the additional power supply and battery unit to ensure sufficient input voltage for precise formation. During charging, it reverts to a simpler configuration using only the first DC-DC conversion module. This dynamic approach enables high manufacturing precision during formation while minimizing device complexity during other operations.
Solution Approach 2:
The additional power supply is selectively activated only during discharge operations where precise voltage control is critical for formation quality. During charging operations, the system uses the standard DC-DC conversion module without the additional power supply. This localized application of enhanced functionality ensures high formation precision where needed while avoiding unnecessary complexity elsewhere in the system.
3Reliability
If the additional power supply is always connected during charging, then the voltage stability is improved, but the energy consumption increases
Solution Approach 1:
The control circuit dynamically determines when to activate the additional power supply based on the operational mode. During charging, it keeps the additional power supply disconnected to minimize energy consumption, using only the first DC-DC conversion module. During discharge, it activates the additional power supply to ensure stable and sufficient voltage input. This dynamic control strategy ensures charging stability when needed while minimizing energy consumption during charging operations.
Solution Approach 2:
The additional power supply is extracted from the charging circuit path during charging operations, leaving only the essential first DC-DC conversion module active. This selective removal of the additional power supply during charging eliminates unnecessary energy consumption while maintaining sufficient voltage stability for normal charging operations. The additional power supply is only reintroduced during discharge when its voltage-boosting function is critically needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances the battery formation effect and improves the accuracy of detected battery capacity by ensuring all battery cells can fully discharge, reducing energy consumption and formation costs.
Implementation Method 1
the first DC-DC conversion module is configured to: when a battery unit discharges into the battery formation apparatus, convert a first voltage input through the low-voltage terminal into a second voltage, and output the second voltage through the high-voltage terminal. The second voltage is greater than the first voltage.
Implementation Method 2
The polarity of the additional power supply is consistent with a polarity of the battery unit. The voltages output by the battery unit and the additional power supply are superposed and then input to the low-voltage terminal of the first DC-DC conversion module
Data Source
AI summary
A battery formation apparatus includes a DC-DC conversion module, an additional power supply, and a control circuit. Low-voltage and high-voltage terminals of the DC-DC conversion module are electrically connected to the control circuit and a DC bus, respectively. The DC-DC conversion module is configured to, when a battery unit discharges into the battery formation apparatus, convert a first voltage input into a second voltage greater than the first voltage, and output the second voltage. The additional power supply is electrically connected to the control circuit, and configured to output an additional voltage. The control circuit is electrically connected to the battery unit, the low-voltage terminal of the DC-DC conversion module, and the additional power supply. The control circuit is configured to serially connect the low-voltage terminal of the DC-DC conversion module, the battery unit, and the additional power supply when the battery unit discharges into the battery formation apparatus.