Electrode Post Insulation Assembly for Battery Pressure Relief
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Solution Overview
Problem
Conventional methods for alleviating internal pressure in electrochemical devices, such as batteries, through pressure relief grooves or valves are cumbersome, increase material costs, and reduce energy density.
Innovation Solution
An electrochemical device with an insulation assembly that includes insulators with different melting points, creating a pressure relief channel upon thermal runaway, eliminating the need for laser drilling and pressure relief valves, and enhancing production efficiency and energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure relief groove or pressure relief hole is created on the battery housing by laser drilling, then the internal pressure of the battery can be relieved, but the production efficiency is impaired and manufacturing complexity increases
Solution Approach 1:
The patent pre-forms recessed portions and through-holes in the housing during the molding process, before the battery is assembled. This preliminary action eliminates the need for subsequent laser drilling operations, thereby maintaining production efficiency while ensuring pressure relief capability is built into the structure from the outset
Solution Approach 2:
The patent changes the physical parameters of the housing by incorporating recessed portions and through-holes with specific dimensions and positions during molding. These parameter changes enable pressure relief functionality without requiring additional manufacturing steps, thus resolving the contradiction between reliability and productivity
2Reliability
If a pressure relief valve is disposed at the pressure relief groove or hole, then the internal pressure can be controlled, but material cost increases and workspace is occupied reducing energy density
Solution Approach 1:
The patent merges the pressure relief valve with the housing structure by forming the recessed portions and through-holes directly in the housing during molding. This integration eliminates the need for separate pressure relief valve components, reducing material usage and increasing energy density while maintaining pressure control capability
Solution Approach 2:
The housing structure is designed to serve multiple functions: it provides structural containment and simultaneously incorporates pressure relief functionality through the recessed portions and through-holes. This multi-functionality eliminates the need for dedicated pressure relief components, thereby improving energy density without sacrificing pressure control
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 insulation assembly effectively manages thermal runaway by reducing gas pressure without additional manufacturing steps, saving costs and improving energy density.
Implementation Method 1
The first insulator is able to be melted when a temperature in the accommodation cavity rises to a first threshold, and generate, under an action of a gas pressure in the accommodation cavity, a pressure relief channel that communicates the accommodation cavity to an outside of the housing
Data Source
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AI summary
This application relates to an electrochemical device (100) and an electronic device. A first sidewall of a housing includes a first wall face (141) and a second wall face (142) The first sidewall (141) includes a penetrative mounting hole (11) . An insulation assembly(20) (20) is snugly connected to the first wall face (141) or the second wall face (142) . A first insulator of the insulation assembly(20) (20) includes a penetrative first through-hole (211) . The first through-hole (211) communicates with the mounting hole (11) . A first part of an electrode post (30) is snugly connected to an end face of the insulation assembly(20) (20) , and the end face is oriented away from the first sidewall (14) . One end of a second part of the electrode post (30) is connected to an end face of the first part(31), and the end face is oriented toward the first sidewall (14) . Another end of the second part(32) is disposed in the mounting hole (11) and the first through-hole(211) . When a temperature in an accommodation cavity (12) rises to a first threshold, the first insulator(21) is melted and generates, under an action of a gas pressure in the accommodation cavity(12) of the housing(10), a pressure relief channel that communicates the accommodation cavity(12) to the outside of the housing(10). The electrochemical device(100) of this application is a simple in the manufacturing process, and improves production efficiency. The insulation assembly(20)(20) serves functions of both insulation and pressure relief, thereby not only reducing the material cost, but also improving the energy density of the electrochemical device(100).