Battery Switch Circuit for Middle Voltage Extraction
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Solution Overview
Problem
Conventional power supply devices with multiple battery devices connected in series face issues with short-circuiting and circuit breakage when extracting DC voltage from a battery device at the middle position, due to the fixed grounding of one battery device, leading to potential short-circuiting of its positive and negative poles.
Innovation Solution
A power supply device with multiple battery devices, each equipped with first and second switch circuits and a control circuit, allowing selective connection and bypassing of battery devices to prevent short-circuiting, enabling the extraction of DC voltage from a battery device at the middle position without causing short-circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a battery device at the middle position is used to extract DC voltage in a series-connected battery system with fixed grounding, then DC voltage extraction is enabled, but short-circuiting occurs between the positive and negative poles of the grounded battery device
Solution Approach 1:
The patent applies dynamics by making the grounding connection movable rather than fixed. The switching circuit dynamically changes which battery device is connected to ground based on the extraction position, allowing any battery device to serve as the grounding point. This resolves the contradiction by enabling DC voltage extraction from middle-position battery devices without causing short-circuits, as the grounding connection adapts to the extraction requirements.
Solution Approach 2:
The switching circuit acts as an intermediary between the battery devices and the ground connection. It mediates the connection by selectively grounding different battery devices based on which DC voltage needs to be extracted, preventing direct short-circuiting while enabling versatile voltage extraction. The switching circuit translates the extraction request into appropriate grounding configuration.
2Adaptability or versatility
If taps are connected to battery devices at both ends and middle position to extract multiple DC voltages, then voltage extraction flexibility is improved, but circuit breakage or firing is caused due to short-circuiting
Solution Approach 1:
The switching circuit dynamically reconfigures the grounding connection based on which battery device needs to be extracted. When a middle-position battery device is selected for extraction, the switching circuit moves the ground connection to that device, preventing short-circuits between positive and negative poles. This dynamic adaptation enables multiple DC voltage extraction without causing harmful short-circuiting effects.
Solution Approach 2:
The switching circuit performs preliminary action by pre-configuring the grounding connection before voltage extraction begins. It anticipates which battery device will be extracted and grounds that device in advance, preventing the short-circuiting condition from occurring. This preliminary configuration avoids circuit breakage and firing by eliminating the harmful short-circuit path before it can form.
3Device complexity
If a fixed battery device is grounded in a series battery system, then circuit simplicity is maintained, but the battery device near ground experiences short-circuiting when middle position extraction is performed
Solution Approach 1:
The patent accepts increased circuit complexity by introducing switching circuits that dynamically change the grounding connection. This dynamic grounding capability prevents short-circuiting between positive and negative poles of the grounded battery device, resolving the reliability issue. The switching circuit adds complexity but enables safe voltage extraction from any battery device in the series connection.
Solution Approach 2:
The switching circuit provides multi-functionality by enabling the system to ground any battery device in the series connection, not just a fixed one. This universal grounding capability allows the system to adapt to different extraction requirements while preventing short-circuits. The added complexity enables the circuit to serve multiple grounding configurations, improving reliability.
Data Source
AI summary
A plurality of required DC voltages are outputted. A power supply device includes: a first switch circuit corresponding to the plurality of battery devices, and that includes a switch for connecting a negative pole terminal, by which negative pole terminals of the battery devices are connected, and a first switch for connecting a positive pole terminal, by which positive pole terminals of the battery devices are connected, and a switch for bypassing, by which the battery devices are bypassed; and a second switch circuit corresponding to the plurality of battery devices, and that includes a second switch for connecting a positive pole terminal, by which positive pole terminals of the battery devices are connected, and a switch for connecting, by which the negative pole terminals of the battery devices are connected to a positive pole terminal of the other battery device.