Battery Pack Sense-Resistor Circuit for Auto Protection Voltage Setting
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Solution Overview
Problem
The existing method of setting protection values for residential battery systems using a dual in-line package (DIP) switch is inconvenient and time-consuming, requiring on-site disassembly and assembly, which places high demands on installers.
Innovation Solution
A battery system with a processing circuit, constant current source, and multiple battery packs, each with sense resistors connected in series, allowing the voltage protection value to be determined without on-site adjustments by using a DIP switch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a DIP switch is used to set the protection value, then the protection value can be adjusted according to the number of battery modules, but the installation process becomes complex and time-consuming
Solution Approach 1:
The patent replaces the mechanical DIP switch system with an electronic sensing system. The sensing circuit automatically detects the number of battery modules connected and determines the protection value electronically, eliminating the need for manual mechanical switch adjustment during installation.
Solution Approach 2:
The system performs self-configuration by automatically detecting the battery module count through the sensing circuit and setting the appropriate protection value without requiring installer intervention. The system serves itself by autonomously determining its operational parameters based on the detected configuration.
2Adaptability or versatility
If a DIP switch is used for setting protection value, then the protection value can be customized, but the installation time is prolonged
Solution Approach 1:
The protection value determination is performed automatically upon connection without requiring preliminary manual configuration steps. The sensing circuit immediately detects the battery module count and configures the protection value, eliminating time-consuming pre-installation setup procedures.
Solution Approach 2:
The electronic sensing and automatic determination system replaces the manual mechanical switch configuration process, dramatically reducing the time required for protection value setting from minutes of manual switch adjustment to instantaneous electronic detection and configuration.
3Quantity of substance
If multiple battery modules are connected in series, then the system capacity increases, but the protection value determination becomes more complex
Solution Approach 1:
The sensing circuit automatically adapts to any number of battery modules connected in series by detecting the total voltage or current characteristics and determining the appropriate protection value without requiring complex external configuration or calculation by the installer.
Solution Approach 2:
The sensing circuit is designed to universally handle various configurations of battery modules by detecting the electrical characteristics and automatically determining the correct protection value, making the system adaptable to different capacities without requiring different determination methods.
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 system allows for quick and convenient setting of voltage protection values, improving safety and reducing labor costs by eliminating the need for on-site switch box adjustments.
Implementation Method 1
the sense resistors of the multiple battery packs are connected in series to form a branch and the branch is connected to two terminals of the constant current source. The processing circuit is connected to the two terminals of the constant current source, and is configured to acquire a voltage between the two terminals of the constant current source as a voltage protection value.
Implementation Method 2
Each of the multiple battery packs includes at least one sense resistor. The sense resistors of the multiple battery packs are connected in series to form a branch
Data Source
Figure 1
Figure 2~3
AI summary
The present application discloses a battery system and a power supply system. The battery system comprises a processing circuit, a constant current source and a plurality of battery packs; each battery pack comprises at least one sampling resistor; the sampling resistors of all the battery packs are connected in series across the constant current source; voltages across the constant current source can directly reflect corresponding voltage protection values when different numbers of battery packs are connected in series; the processing circuit is connected across the constant current source, and uses the voltage across the constant current source as a voltage protection value to compare same with a voltage after the plurality of battery packs are connected in series. According to the battery system provided by the present application, the voltage protection value is directly represented by means of the voltage across the constant current source, and there is no need for an installation worker to open a switch box on site to adjust the voltage protection value by means of a DIP switch, thereby achieving convenience and rapidness, improving the safety, and reducing personnel costs.