Battery Connection Switching Circuit With Diode-Based Rectification
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Solution Overview
Problem
Existing electric circuits for electric vehicles require a complex configuration of many switches to manage storage cell units, making them cumbersome and prone to failures.
Innovation Solution
An electric circuit with diodes and contactors that rectify currents and switch battery connections between parallel and series configurations, simplifying the configuration and reducing the number of mechanical switches, thereby minimizing the risk of failures and allowing efficient use of power from multiple batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If many switches are used to appropriately switch a plurality of storage cell units, then the battery system can efficiently manage charging and discharging, but the configuration becomes complicated
Solution Approach 1:
The patent combines multiple switch functions into a single connection switching device that can simultaneously control the connection state between first and second batteries and between batteries and the load, thereby reducing configuration complexity while maintaining full battery management capability
Solution Approach 2:
The connection switching device is designed to perform multiple functions: switching batteries between series and parallel connections, controlling charge/discharge paths, and managing power flow to the load, eliminating the need for separate switches for each function
2Productivity
If many switches are used to switch storage cell units, then efficient power management is achieved, but the number of mechanical components increases leading to higher failure risk
Solution Approach 1:
Multiple switch functions are merged into a single connection switching device, reducing the total number of mechanical components while maintaining efficient power management capability across all battery units
Solution Approach 2:
The patent replaces traditional mechanical switches with a connection switching device that uses minimal mechanical components, thereby maintaining switching functionality while significantly reducing the number of potential failure points
3Power
If storage cell units are connected in series during discharging, then higher voltage is obtained, but the connection configuration becomes more complex
Solution Approach 1:
The connection switching device dynamically reconfigures battery connections based on operational mode: connecting batteries in series during discharging to maximize voltage output, and in parallel during charging to optimize current distribution, with automatic switching between configurations
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
The solution enables a simpler configuration for using power from multiple batteries, reducing the likelihood of mechanical switch failures and efficiently managing battery connections during charging and discharging.
Implementation Method 1
a first rectifier configured to rectify a current flowing between a first pole terminal of the power supply and a first pole terminal of the first battery
Implementation Method 2
a second rectifier configured to rectify a current being different from the current and flowing between the first pole terminal of the power supply and a first pole terminal of the second battery
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An electric circuit switches connection among a plurality of storage cell units including a first storage cell unit and a second storage cell unit, a load of the plurality of storage cell units, and a power supply supplying power to the plurality of storage cell units. The electric circuit includes: a first rectifier configured to rectify a current flowing between a first pole terminal of the power supply and a first pole terminal of the first storage cell unit with homopolarity as polarity of the first pole terminal of the power supply; a second rectifier configured to rectify a current being different from the current and flowing between the first pole terminal of the power supply and a first pole terminal of the second storage cell unit with homopolarity as the polarity of the first pole terminal of the power supply; and a connection switching device configured to connect the plurality of storage cell units in series between the first pole terminal of the first storage cell unit and the first pole terminal of the second storage cell unit and release the series connection of the plurality of storage cell units during a period in which the power supply supplies power to the plurality of storage cell units.