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One-piece pyrolysis connector and lithium-ion battery containing the connector

A technology of pyrolysis and connectors, which is applied to battery pack components, circuits, structural parts, etc., can solve the problems of thermal runaway of batteries, explosion-proof valves of square batteries leading away heat, etc., to prevent thermal runaway and heat accumulation , the effect of reducing complexity

Active Publication Date: 2021-06-11
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the square battery, the pouch battery has a more free shape design, but after the thermal runaway of the monomer, it is difficult to use the design similar to the explosion-proof valve of the square battery to guide the heat away, because the pouch battery breaks The place is random, and the heat generated will cause thermal runaway of the surrounding batteries one after another

Method used

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  • One-piece pyrolysis connector and lithium-ion battery containing the connector
  • One-piece pyrolysis connector and lithium-ion battery containing the connector
  • One-piece pyrolysis connector and lithium-ion battery containing the connector

Examples

Experimental program
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Effect test

Embodiment 1

[0047] 85% polyethylene carbonate, 10% potassium hydroxide and 5% acetylene black (30 nm) were used to make cube samples of size 30 mm.

Embodiment 2

[0049] 85% polypropylene carbonate, 10% potassium hydroxide and 5% carbon fiber (250nm in diameter, 2um in length) were used to make cube samples with a size of 30mm.

Embodiment 3

[0051] 80% polypropylene carbonate (25511-85-7, Sigma-Aldrich) and 15% sodium sulfate (Sigma-Aldrich) and 5% graphene and carbon nanotubes (the size of graphene is 2um, the average About 8 layers, the carbon nanotubes are multi-walled, with a diameter of 20 nm and a length of 400 nm) to make a cube sample with a size of 30 mm.

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Abstract

The invention discloses an integrated pyrolysis connector and a lithium ion battery containing the connector. The integrated pyrolysis connector includes a connecting plate and a supporting column fixed on one side of the connecting plate at intervals, and the top of the supporting column is fixed to the There are clamping columns, and insertion grooves are formed between adjacent clamping columns; conductive layers are provided on the top surface of the clamping columns and the inner wall of the insertion groove, and the clamping columns are made of pyrolytic materials , the pyrolysis material is mixed with thermosensitive resin and functional additives. The connector of the present invention consists of two parts: thermosensitive resin decomposed by pyrolysis and conductive layer. Among them, the conductive layer can realize the electrical connection with the tabs of the battery core, and the heat-sensitive resin can automatically decompose when the temperature of the battery core is too high, causing the conductive layer on the surface to collapse without producing an electrical connection, which can prevent further heat generation of the battery core. Out of control, greatly improving the safety performance of the battery.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to an integrated high temperature decomposition connector and a lithium ion battery containing the connector. Background technique [0002] In the past two decades, lithium-ion batteries have become the most important power source for new energy vehicles. In order to make it widely available, it is necessary to further reduce the cost of lithium-ion batteries while improving their performance. In addition, in order to improve the cruising range of electric vehicles, the industry is still pursuing higher energy density of lithium-ion batteries. [0003] In the design of battery packs and modules, the design of fuses for electrical connection between cells has always been a difficult point. When a problem occurs in a single cell, such as a micro-short circuit, if the electrical connection with the cell can be cut off in time, This can prevent further thermal runaway of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/503H01M50/581
CPCH01M50/50H01M50/572Y02E60/10H01M50/581H01M50/503H01M50/526H01M50/522H01M50/524
Inventor 程骞张雅蔡毅李晨
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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