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Detection system and probability assessment method for chain explosion of lithium ion battery pack

A lithium-ion battery pack and detection system technology, which is applied in the fields of material explosiveness, measurement devices, data processing applications, etc., can solve the problems of lack of safety evaluation methods, and achieve the effect of improving safety

Active Publication Date: 2017-05-24
BEIJING INSTITUTE OF TECHNOLOGYGY +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing relevant lithium-ion battery standards put forward high requirements for single lithium-ion batteries, but there is almost no safety assessment method for lithium-ion batteries after grouping.

Method used

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  • Detection system and probability assessment method for chain explosion of lithium ion battery pack
  • Detection system and probability assessment method for chain explosion of lithium ion battery pack
  • Detection system and probability assessment method for chain explosion of lithium ion battery pack

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Embodiment 1

[0050] This embodiment is used to illustrate the method for evaluating the probability of cascading explosions of lithium-ion battery packs and the detection system for cascading explosions of lithium-ion battery packs of the present invention.

[0051] The detection system includes: an explosion-proof box, a battery clamping device, a real-time detection device, a real-time receiving device, a working condition device, a pressure sensor, a synchronous controller and a high-speed camera.

[0052] The battery clamping device is installed in the explosion-proof box for clamping the lithium-ion battery pack to be tested.

[0053] The real-time detection device includes a temperature sensor and a thermal imager for detecting the temperature of each single cell in the lithium-ion battery pack, and a strain gauge for detecting the deformation of each single cell. The temperature sensor and the strain gauge The slice is placed at the center of the surface closest to the body center o...

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Abstract

The invention provides a detection system and a probability assessment method for chain explosion of a lithium ion battery pack. The probability assessment method comprises the following steps: (1) determining a relational expression of the explosion probability YT and temperature T of a single battery; (2) determining a relational expression of the explosion probability YN and deformation N of the single battery; (3) obtaining an expression of the total probability Y of the single battery under different temperatures and deformations according to step (1) and step (2); and (4) detecting the temperature and deformation of each single battery in the lithium ion battery pack, calculating the explosion probability of each single battery according to the expression of Y, and determining the chain explosion probability of the lithium ion battery pack to be the highest explosion probability of the single batteries. The detection system and the probability assessment method for chain explosion of the lithium ion battery pack can be used for detecting the real-time chain explosion probabilities of the lithium ion battery pack under different working conditions and clinical conditions for chain explosion reaction, thereby realizing pertinent safety prevention and control.

Description

technical field [0001] The invention belongs to the field of safety performance detection of battery packs, and in particular relates to a probability evaluation method for chain explosions of lithium-ion battery packs and a detection system for chain explosions of lithium-ion battery packs. Background technique [0002] Lithium-ion battery is a kind of "green battery" with very good development prospects at present. Compared with other batteries, lithium-ion battery has the advantages of high energy storage efficiency and long service life. Lithium-ion batteries are widely used in electric vehicles, portable devices, energy storage, aerospace and other fields due to their significant advantages such as high working voltage, large specific energy, small size, and fast charging and discharging. [0003] However, due to its high energy density and the use of an organic flammable electrolyte system, lithium-ion batteries will cause thermal runaway under certain conditions when ...

Claims

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Application Information

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IPC IPC(8): G01N25/54G01D21/02G06Q10/06
CPCG01D21/02G01N25/54G06Q10/06395
Inventor 朱艳丽齐创高飞焦清介王松岑杨凯
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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