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New energy group vehicle thermal runaway risk assessment method based on digital twinning

A new energy vehicle and risk assessment technology, applied in the field of thermal runaway risk assessment of new energy group vehicles, can solve the problem that the thermal runaway of power batteries cannot be quantitatively characterized, and achieve high real-time effects

Active Publication Date: 2022-03-25
BEIHANG UNIV
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  • Application Information

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Problems solved by technology

[0005] Aiming at the problem that the thermal runaway of single-vehicle power batteries of new energy vehicles cannot be quantified and characterized, this invention proposes a thermal runaway risk assessment method for new energy group vehicles based on digital twins

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  • New energy group vehicle thermal runaway risk assessment method based on digital twinning
  • New energy group vehicle thermal runaway risk assessment method based on digital twinning
  • New energy group vehicle thermal runaway risk assessment method based on digital twinning

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Embodiment Construction

[0047] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0048] The present invention from the workflow of the system level such as figure 1 shown. To realize this method, it needs to be composed of car-side battery, car-side BMS, cloud BMS, cloud battery model, battery pack database and cloud computing center. The digital twin technology of the present invention collects battery pack and battery cell data through the vehicle-mounted BMS, calculates various data of the battery and uploads it to the cloud through 5G, and the cloud calculates corresponding indicators through the received data. The cloud BMS obtains the correction data through calculation, and then modifies the cloud model battery data, and transmits the changed model data to the vehicle BMS. The model operation process is as follows figure 2 shown.

[0049] The method for evaluating thermal runaway of new energy group vehicles ...

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Abstract

The invention discloses a new energy group vehicle thermal runaway risk assessment method based on digital twinning. The method comprises the following steps: preprocessing battery data; establishing a new energy vehicle group; establishing a cloud battery model; extracting the thermal runaway probability information gain of the thermal runaway inducement; and performing thermal runaway early warning. According to the method, refined digital twinborn modeling of single vehicle thermal runaway can be realized, group digital twinborn modeling of vehicle group thermal runaway behaviors is realized, a probability sequence of thermal runaway in group vehicles is given, and thermal runaway early warning information and battery state information for single vehicles are provided for new energy vehicle manufacturers and battery manufacturers; the bicycle thermal runaway risk which cannot be quantitatively evaluated is converted into evaluation of the thermal runaway probability in the bicycle group, quantitative description of the bicycle thermal runaway probability is achieved, and prediction of the bicycle thermal runaway event and comprehensive management of the group thermal runaway risk are achieved.

Description

technical field [0001] The invention belongs to the field of vehicle-cloud collaborative battery management of intelligent networked vehicles, and specifically relates to a digital twin-based thermal runaway risk assessment method for vehicles in new energy groups. Background technique [0002] Long battery life and low energy consumption are the core key indicators of electric vehicles, and lithium-ion batteries with high specific energy and long life are excellent on-board energy storage systems to achieve this indicator. However, with the improvement of battery energy density and battery pack capacity and the complexity of the environment for new energy vehicles, due to the influence of factors such as poor manufacturing, thermal abuse, electrical abuse, and mechanical abuse, lithium-ion batteries led by thermal runaway System safety accidents occur from time to time, seriously threatening the safety of occupants and property, and restricting the further promotion and tec...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/30
CPCG06Q10/0635G06Q10/067G06Q50/40Y02T10/70
Inventor 杨世春荣健睿李强伟周思达闫啸宇周新岸
Owner BEIHANG UNIV
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