Welding-free connector electrically connected with battery cell and lithium ion battery comprising same

A technology without welding and electrical connection, which is applied in the field of lithium-ion batteries. It can solve the problems of square battery explosion-proof valve leading away heat and battery thermal runaway, achieving good mechanical strength, preventing thermal runaway, and improving safety.

Active Publication Date: 2020-05-19
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

Method used

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  • Welding-free connector electrically connected with battery cell and lithium ion battery comprising same
  • Welding-free connector electrically connected with battery cell and lithium ion battery comprising same
  • Welding-free connector electrically connected with battery cell and lithium ion battery comprising same

Examples

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Embodiment 1

[0050] A cylindrical spline with a diameter of 25mm and a length of 80mm is made by mixing 90% polypropylene carbonate and 10% potassium hydroxide.

Embodiment 2

[0052] Using 95% polyethylene carbonate and 5% sodium carbonate to mix evenly, make a cylindrical spline with a diameter of 25mm and a length of 80mm.

Embodiment 3

[0054] Using 70% polycarbonate and 20% potassium hydroxide and 10% sodium sulfate. A cylindrical spline with a diameter of 25mm and a length of 80mm is made.

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Abstract

The invention discloses a welding-free connector electrically connected with a battery cell and a lithium ion battery. The welding-free connector comprises a current collecting bar, the current collecting bar is clamped with a connecting plate, the connecting plate comprises a back plate and clamping columns fixedly arranged on one side of the back plate at intervals, and a groove used for being clamped with the current collecting bar is formed between every two adjacent clamping columns; the periphery of the clamping column or the inner side wall of the groove is coated with a thermal decomposition material layer, and the thermal decomposition material layer is formed by compounding heat-sensitive resin and a modified material; and the back plate and the clamping columns are made of high-thermal-conductivity insulating materials. According to the invention, the electric connection connector assembly composed of the current collecting bar and the connecting plate connected with the current collecting bar in a matched manner is adopted, and has certain mechanical strength and good heat conduction capability at normal temperature. When a short circuit occurs, the heat-sensitive resinin the thermal decomposition material layer coated on the connecting plate is decomposed by heating, so that the pre-tightening force between the battery cell tab and the connecting sheet disappears,the connection between the battery cells is disconnected, the thermal runaway is prevented, and the safety of the battery is greatly improved.

Description

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Claims

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Application Information

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IPC IPC(8): H01M2/34H01M10/0525
CPCH01M10/0525H01M50/581Y02E60/10H01M50/105H01M50/503H01M50/517H01M50/522H01M50/526H01M50/572H01M50/557H01M50/162
Inventor 张雅程骞蔡毅李晨
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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