Battery Verification Module Using One-Wire Protocol for Authenticity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional battery verification methods fail to distinguish non-original batteries from original ones, leading to potential safety hazards due to overcharge, as they cannot differentiate batteries with resistors of the same resistance.
Innovation Solution
An electrical apparatus with a battery verification module that includes a verification circuit and identification resistor, where the type information of the battery module is obtained by reading the voltage level on a coupled terminal, and a verification signal is transmitted using a one-wire protocol to verify the battery module, preventing damage from unverified batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pull-down resistor is used in the battery for voltage division and battery identification, then the battery verification module can read the voltage to distinguish battery labels, but non-original batteries with the same resistance value cannot be distinguished from original batteries, leading to safety hazards
Solution Approach 1:
The patent changes the verification parameter from resistance value to communication response characteristics. The verification circuit uses a one-wire protocol to exchange verification requests and responses between the battery verification module and the battery module, allowing identification based on communication behavior rather than static resistance values. This resolves the inability to distinguish batteries with identical resistance values.
Solution Approach 2:
The patent introduces a verification circuit as an intermediary component between the battery verification module and the battery module. This verification circuit includes a coupled path with coupled terminals that enables bidirectional communication through the one-wire protocol, facilitating reliable verification without direct connection between the verification module and battery terminals.
2Loss of information
If the battery verification module reads voltage level to obtain type information, then battery type can be identified, but verification of actual battery authenticity and safety cannot be ensured
Solution Approach 1:
The patent implements a feedback mechanism through the one-wire communication protocol. The battery verification module sends a verification request to the verification circuit, and the verification circuit responds with a verification signal containing authentication information. This bidirectional feedback loop enables reliable authenticity verification beyond simple type identification.
Solution Approach 2:
The patent replaces the passive voltage division method with an active communication-based verification system. Instead of relying solely on voltage level reading, the system uses digital communication protocols to exchange verification data, providing more reliable and comprehensive battery authentication.
3Device complexity
If conventional voltage division method is used for battery verification, then the circuit structure is simple, but the verification capability is insufficient to prevent damage from unverified batteries
Solution Approach 1:
The patent makes the verification circuit multi-functional by enabling it to perform both voltage level reading and bidirectional communication verification through the same coupled path. The one-wire protocol allows the verification circuit to serve multiple purposes: type identification, authenticity verification, and safety protection, eliminating the need for separate verification circuits.
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
Effectively identifies the type information of the battery module, preventing damage to the electrical apparatus by distinguishing original from non-original batteries and ensuring safe charging.
Implementation Method 1
the voltage on the terminal DT is equal to the voltage obtained by dividing the voltage V1 according to the resistances of the pull-up resistor RPU and the pull-down resistor RPL
Data Source
AI summary
An electrical apparatus including a battery module and a battery verification module is disclosed. The battery module has a verification circuit and an identification resistor. When the battery module is connected to the battery verification module, the battery verification module obtains a type information of the battery module according to the voltage level on a coupled point between a reference resistor and the identification resistor. The battery verification module transmits a verification request to the verification circuit to allow the verification circuit to transmit a verification signal to the battery verification module through a coupled path between the reference resistor and the identification resistor. The reference resistor is built in the battery verification module.