Multifunctional current collector for grouping lithium ion batteries

A technology of lithium-ion batteries and current collectors, which is applied to battery pack components, secondary batteries, circuits, etc., and can solve problems such as current limiting, battery heat production drop, and temperature drop

Pending Publication Date: 2022-03-22
HUIZHOU JUDING ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical result described in this patented technology helps prevent damage caused from overheating or even burning up certain components inside an electric vehicle's power supply unit (PDU). This results in better performance for its own equipment while also improving safety measures during use.

Problems solved by technology

Technological Problem addressed in this patents relating to secondary batteries such as lith ion batteries include the potential safety hazards associated with excessively hot currents from external sources like accidental ones causing damage through rapid discharge. Current methods involve adding protective devices at regular intervals until they become less safe after being charged into the battery's charging cycle. However, even without any significant risk of failure, some battery banks still experience thermal runway leading to catastrophic events.

Method used

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  • Multifunctional current collector for grouping lithium ion batteries
  • Multifunctional current collector for grouping lithium ion batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Take crystalline polymer materials, conductive materials and necessary auxiliary materials, mix and melt in proportion to form positive temperature coefficient resistance materials, and load them into the printer;

[0023] (2) spraying the resistance material on the current collector according to the designed pattern, and then covering and pressing the first electrode onto the resistance material to form the first electrode;

[0024] (3) Install the current sensor on the current collector according to the requirements of the current sensor.

Embodiment 2

[0026] (1) Take crystalline polymer materials, conductive materials and necessary auxiliary materials, mix and melt in proportion to form positive temperature coefficient resistance materials;

[0027] (2) compressing the resistance material between two metal foils to obtain a positive temperature coefficient thermistor;

[0028] (3) Solder wires on the thermistor, and then connect them to each other to form a series-parallel relationship;

[0029] (4) Install the current sensor on the current collector according to the requirements of the current sensor.

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PUM

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Abstract

The invention discloses a multifunctional current collector for grouping lithium ion batteries, which has the first function that when one single battery in a battery pack is subjected to internal short circuit caused by lithium dendrites, the internal short circuit cannot form an external short circuit loop of other batteries connected in parallel with the single battery in the battery pack; therefore, corresponding thermal runaway diffusion and battery pack fire are avoided; the second function of the current collecting piece is that when an internal short circuit fault occurs, the fault is reported to a battery management system immediately, so that the battery can be maintained in time. The current collector is composed of a conductive terminal for connecting battery electrodes, a positive temperature coefficient (PTC) conductive material, a bus electrode and an abnormal condition sensor, can be directly used for parallel connection and series connection of a plurality of single batteries, and has the advantages that the cost is low, and the safety performance of the lithium ion battery is remarkably improved.

Description

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Claims

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Application Information

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Owner HUIZHOU JUDING ELECTRONICS CO LTD
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