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Device and method for simulating short circuit in battery

A technology of simulation device and simulation method, which is applied in the direction of measuring device, measuring electricity, and measuring electric variables, etc., can solve problems such as uncertain changes in battery parameters, limited adverse effects of batteries, internal failures of batteries, etc., and achieve the effect of ensuring structural integrity

Pending Publication Date: 2018-11-16
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The safety risks of battery use mainly come from two aspects, one is the influence of the external environment, and the other is the internal failure of the battery caused by internal defects of the battery or other factors; for the influence of the external environment, a number of regulations on battery safety have been formulated at home and abroad. The testing standard comprehensively considers the misuse and abuse conditions of the battery in the normal use and reasonably foreseeable range, and sets up different forms of safety test items such as extrusion, collision, drop and overcharge, covering the battery The safety risks that may be caused by the external environment during actual use; and the detection standards for internal faults caused by internal defects of the battery or other factors, because the existing technology is difficult to predict and discover in a timely and effective manner, and it is correspondingly difficult to repeat In fact, battery internal problems cause the greatest battery safety risk, and are also the main inducing factors in battery safety accidents. Many current lithium-ion battery safety accidents are related to internal battery defects or other factors. short circuit fault
[0003] The short-circuit inside the battery often occurs at a very small point inside the battery, and the adverse impact on the battery is limited in a short period of time, and the corresponding battery parameter changes are uncertain. How to predict and find the short-circuit inside the battery in time is an urgent problem in battery safety. A difficult point, although the existing environmental suitability tests such as acupuncture, extrusion, etc. will cause short circuit in the battery, but this severe method will cause serious damage to the battery, destroy the integrity of the battery, and the actual occurrence of short circuit in the battery The situation was very different when

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  • Device and method for simulating short circuit in battery
  • Device and method for simulating short circuit in battery
  • Device and method for simulating short circuit in battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A simulation device for internal short circuit in a battery:

[0035] Battery: including positive pole B+, separator B30 and negative pole B—

[0036] Heat-shrinkable film: PE (polyethylene) with a circular single-layer structure, embedded in the separator B30 and in contact with the battery electrodes, the cross-sectional area before shrinkage is 105% of the hole area of ​​the embedded separator;

[0037] Heating unit: microwave heating device;

[0038] Data collection unit: a charge and discharge tester connected to the battery through an induction device, and used to collect characteristic parameters of the battery body when the battery is heated and triggers an internal short circuit in the battery.

[0039] A method for simulating a short circuit in a battery based on a heat-shrinkable film, comprising the steps of:

[0040] (1) Set the battery state of charge (SOC) to 100%;

[0041] (2) heating the battery at a temperature range of 70-90°C,

[0042] And use th...

Embodiment 2

[0045] A simulation device for internal short circuit in a battery:

[0046] Battery: including positive pole B+, separator B30 and negative pole B—

[0047] Heat-shrinkable film: PVC (polyvinyl chloride) with a rectangular single-layer structure, embedded in the diaphragm B30 and in contact with the battery electrodes, the cross-sectional area before shrinkage is 105% of the hole area of ​​the embedded diaphragm;

[0048] Heating unit: laser heating device;

[0049] Data collection unit: a charge and discharge tester connected to the battery through an induction device, and used to collect characteristic parameters of the battery body when the battery is heated and triggers an internal short circuit in the battery.

[0050] A method for simulating a short circuit in a battery based on a heat-shrinkable film, comprising the steps of:

[0051] (1) Set the battery state of charge (SOC) to 50%;

[0052] (2) heating the battery at a temperature range of 70-90°C,

[0053] And u...

Embodiment 3

[0056] A simulation device for internal short circuit in a battery:

[0057] Battery: including positive pole B+, separator B30 and negative pole B—

[0058] Heat-shrinkable film: POF (polyolefin) with a rectangular double structure, embedded in the separator B30 and in contact with the battery electrodes, the cross-sectional area before shrinkage is 105% of the hole area of ​​the embedded separator;

[0059] Heating unit: infrared heating device;

[0060] Data collection unit: a charge and discharge tester connected to the battery through an induction device, and used to collect characteristic parameters of the battery body when the battery is heated and triggers an internal short circuit in the battery.

[0061] A method for simulating a short circuit in a battery based on a heat-shrinkable film, comprising the steps of:

[0062](1) Set the battery state of charge (SOC) to 80%;

[0063] (2) heating the battery at a temperature range of 70-90°C,

[0064] And use the charg...

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Abstract

The invention provides a device and method for simulating a short circuit in a battery. The device comprises a battery; a heat shrinkable film connected to the two poles of the battery in the batteryand shrinking when reaching a heat shrinking temperature; a heating unit for heating the battery to the heat shrinking temperature; and a data acquisition unit connected to the battery through a sensing device and configured to acquire a battery body characteristic parameter of the battery in a process of triggering the short circuit in the battery by heating. The device and method ensure the structural integrity of the battery before and after the triggering of the short circuit in the battery, can accurately capture the body characteristic change of the short circuit in the battery and the degree of damage after the short circuit in the battery, timely predicts and discovers the short circuit in the battery, and provides guarantee for safety device protection design and personnel protection.

Description

technical field [0001] The invention relates to a battery safety simulation device, in particular to a battery internal short circuit simulation device and simulation method. Background technique [0002] The safety risks of battery use mainly come from two aspects, one is the influence of the external environment, and the other is the internal failure of the battery caused by internal defects of the battery or other factors; for the influence of the external environment, a number of regulations on battery safety have been formulated at home and abroad. The testing standard comprehensively considers the misuse and abuse conditions of the battery in the normal use and reasonably foreseeable range, and sets up different forms of safety test items such as extrusion, collision, drop and overcharge, covering the battery The safety risks that may be caused by the external environment during actual use; and the detection standards for internal faults caused by internal defects of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02G01R31/36
CPCG01R31/3644G01R31/50
Inventor 王康康杨凯高飞张明杰耿萌萌范茂松刘皓赵录兴
Owner CHINA ELECTRIC POWER RES INST