Battery Cover Plate Assembly With Mechanical Current Interruption
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Solution Overview
Problem
Existing battery management systems face challenges in accurately monitoring voltage and current, leading to potential overcharging and explosion risks due to sampling failures, especially during communication failures between charging piles and battery managers.
Innovation Solution
A battery cover plate assembly with a current interrupt apparatus that includes a score member and a flipping member, connected by air pressure to break an electrical connection between the inner and outer electrode terminals, ensuring safe interruption of charging and discharging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a battery management system uses voltage and current sampling methods to monitor battery status, then battery charging and discharging can be controlled, but sampling failures may cause overcharging and explosion risks
Solution Approach 1:
The patent replaces the electronic sampling and control system with a mechanical current interrupting system. When overcharging is detected or abnormal conditions occur, a mechanical structure (flipping member breaking a score) physically interrupts the current flow, eliminating reliance on continuous electronic monitoring and sampling accuracy.
Solution Approach 2:
The patent introduces an intermediate mechanical mechanism between the electrical components. The flipping member acts as an intermediary that translates electrical signals into mechanical action, which then physically breaks the circuit through the score, providing a fail-safe current interruption mechanism.
2Ease of operation
If communication between charging pile and battery manager is used for charging control, then charging can be managed remotely, but communication failures lead to loss of charging control
Solution Approach 1:
The battery system performs self-protection through the mechanical current interrupting mechanism. When abnormal conditions are detected, the system automatically triggers the flipping member to break the score and interrupt current flow, without requiring external communication or control, ensuring autonomous safety.
Solution Approach 2:
The patent prepares a mechanical fail-safe mechanism in advance that can independently interrupt current flow if communication fails or abnormal conditions occur. This pre-positioned mechanical system acts as a cushion against communication failures, ensuring charging control reliability without continuous external communication.
3Reliability
If a mechanical current interrupting structure is added to the battery assembly, then overcharging protection is improved, but device complexity increases
Solution Approach 1:
The patent merges the current interrupting mechanism with existing battery components. The flipping member and score are integrated into the battery housing or cover plate structure, and the mechanical linkage is combined with the electrode terminal connections, reducing the need for separate independent components.
Solution Approach 2:
The mechanical structure serves multiple functions: it provides structural support for the battery assembly, acts as the current carrying path, and functions as the current interrupting mechanism when the score is broken. This multi-functionality reduces the number of separate components 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
The solution effectively prevents overcharging by mechanically interrupting current flow under air pressure, enhancing safety and reliability in battery management systems.
Implementation Method 1
The flipping member is capable of acting under an effect of air pressure to break the score
Data Source
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AI summary
A battery cover plate assembly, a cell, a battery module, a power battery, and an electric vehicle are provided. The battery cover plate assembly includes a cover plate, an inner lead-out member, and an outer electrode terminal. The inner lead-out member and the outer electrode terminal are electrically connected by using a current interrupt apparatus. A flipping member of the current interrupt apparatus is electrically connected to the outer electrode terminal. A score member is electrically connected to the inner lead-out member. A score is formed on the score member and is electrically connected to the flipping member. The inner lead-out member is mounted on the cover plate through a cover plate insulator. The cover plate insulator has a first engagement portion engaged with the cover plate and a second engagement portion engaged with the inner lead-out member.