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Power battery thermal runaway early warning method and device and electric vehicle

A power battery and early warning device technology, applied in electric vehicles, battery/fuel cell control devices, electrical devices, etc., can solve problems such as power battery thermal runaway alarms, etc., to achieve comprehensive detection coverage and ensure safety.

Pending Publication Date: 2022-05-31
BEIJING ELECTRIC VEHICLE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the embodiment of the present invention is to provide a power battery thermal runaway warning method, device and electric vehicle, so as to solve the problem in the prior art that the power battery thermal runaway state cannot be alarmed in advance

Method used

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  • Power battery thermal runaway early warning method and device and electric vehicle
  • Power battery thermal runaway early warning method and device and electric vehicle

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Embodiment Construction

[0046] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0047] Aiming at the problem in the prior art that the thermal runaway state of the power battery cannot be alarmed in advance, the embodiments of the present invention provide a power battery thermal runaway warning method, device and electric vehicle.

[0048] like figure 1 As shown, an embodiment of the present invention provides a power battery thermal runaway warning method, including:

[0049] Step S11, monitoring the working sampling data of each cell in the power battery in real time;

[0050] In this step, the power battery thermal runaway early warning method can monitor the state of the power battery in real time by collecting other working sampling data such as battery voltage, battery temperature, and changes in battery inte...

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Abstract

The invention provides a power battery thermal runaway early warning method and device and an electric automobile, and relates to the technical field of electric automobile safety. The power battery thermal runaway early warning method comprises the steps that working sampling data of each battery cell in a power battery is monitored in real time; judging the thermal runaway state of the battery according to the working sampling data to obtain a judgment result; and when the judgment result is that the battery thermal runaway state exists, sending a thermal runaway early warning signal. According to the scheme, the problem battery cells of the vehicle in different states are recognized, an alarm is given in advance for thermal runaway, and the safety of the vehicle and personnel is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle safety, and in particular relates to a power battery thermal runaway warning method, device and electric vehicle. Background technique [0002] At present, electric vehicles on the market have frequent safety accidents caused by thermal runaway of power batteries, and the safety situation is very serious. According to the survey, the main reason for the thermal runaway of the battery is the internal short circuit of the power battery. Most of the thermal runaway events of the power battery occur in the stationary state after the vehicle is charged. At present, most of the battery temperature, battery state of charge and battery health are used. The state model, to analyze the thermal runaway of the battery, requires the battery management system to be in a working state, which cannot meet the needs of reporting alarm signals in the stationary state of the vehicle and the need for early wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00B60L58/10H01M10/42H01M10/48
CPCB60L3/0046B60L58/10H01M10/42H01M10/48Y02T10/70
Inventor 王晓婷张骞慧庞博贺中玮侯金钢梁海强
Owner BEIJING ELECTRIC VEHICLE
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