Battery thermal runaway detection methods and devices

A detection method and thermal runaway technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of battery thermal runaway, easy heat accumulation, unevenness, etc., to avoid false positives, thermal runaway and diffusion detection Timely and precise, high-precision results

Inactive Publication Date: 2019-07-30
CH AUTO TECH CORP CO LTD
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Problems solved by technology

The power source of new energy vehicles is a large number of power batteries grouped together. The battery pack has a compact structure. During the high-rate charge and discharge process of the battery, the heat generated is large, and the heat is easy to accumulate and difficult to dissipate. Decrease, capacity attenuation, easy to cause battery thermal runaway accidents
As the ene

Method used

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  • Battery thermal runaway detection methods and devices
  • Battery thermal runaway detection methods and devices
  • Battery thermal runaway detection methods and devices

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Embodiment Construction

[0062] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0063] figure 1 It is a flowchart of a method for detecting battery thermal runaway according to an exemplary embodiment of the present disclosure. Such as figure 1 As shown, the method includes steps 101 to 103.

[0064] In step 101, voltage detection data of multiple voltage detection points in the battery and multiple temperature detection data of multiple temperature detection points in the battery are acquired. The voltage detection points in the battery can be set on each series module including multiple series cells. The number of voltage detection points is generally less than the number of temperature detection points, but there are not only one v...

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Abstract

The invention relates to battery thermal runaway detection methods and devices. The method comprises the steps of obtaining voltage detection data of a plurality of voltage detection points in a battery, and a plurality of pieces of temperature detection data of a plurality of temperature detection points in the battery; computing a temperature rising rate of the battery according to the pluralityof pieces of temperature detection data; and judging whether thermal runaway occurs in the battery or not according to the plurality of pieces of voltage detection data, the plurality of pieces of temperature detection data and the temperature rising rate. Through utilization of the technical scheme, the plurality of pieces of voltage detection data and the plurality of pieces of temperature detection data can be obtained according to the plurality of voltage detection points and temperature detection points set in the battery, the temperature rising rate of the battery is computed accordingto the temperature detection data, and whether the thermal runaway occurs in the battery or not is predicted through judgment of three aspects of the voltage detection data, the temperature detectiondata and the temperature rising rate. Through utilization of a multi-condition coupled method, battery thermal runaway and diffusion can be detected relatively timely and precisely under a plurality of working conditions.

Description

technical field [0001] The present disclosure relates to the field of battery safety, and in particular, to a method and device for detecting battery thermal runaway. Background technique [0002] With the increasing energy crisis and environmental pollution problems, energy-saving and environmentally friendly new energy vehicles have been rapidly developed. The power source of new energy vehicles is a large number of power batteries grouped together. The battery pack has a compact structure. During the high-rate charge and discharge process of the battery, the heat generated is large, and the heat is easy to accumulate and difficult to dissipate. Decrease and capacity attenuation can easily lead to battery thermal runaway accidents. As the energy storage unit of new energy vehicles, batteries are extremely powerful if their energy is released through combustion or explosion, which can easily cause casualties. At present, the method of improving the safety of new energy ve...

Claims

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Application Information

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IPC IPC(8): G01R31/382
CPCG01R31/382
Inventor 王克坚张雅琨
Owner CH AUTO TECH CORP CO LTD
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