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Online safety pre-warning method of power batteries for electric car based on cloud platform and battery management system

A battery management system and power battery technology, applied in electric vehicle charging technology, electric vehicles, battery/fuel cell control devices, etc., can solve problems such as large internal resistance difference, abnormal safety, safety accidents, etc., to prevent The effect of abnormal safety and strong practicability

Active Publication Date: 2018-09-21
SHANGHAI ENNEAGON ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, simply monitoring information such as voltage or temperature is not enough to predict the occurrence of security anomalies
When simply monitoring the voltage information, the voltage of the power battery is similar, but the difference in internal resistance is large, and safety abnormalities and even safety accidents may also occur
In addition, simply detecting the voltage and temperature of the power battery cannot cover all the possibilities of abnormal safety of the power battery. The method of early warning information is very important

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Temperature abnormality early warning method for charging and discharging exceeding current limit

[0031] The abnormal temperature warning of charging and discharging exceeding the limit current, collects the current, voltage, temperature and resistance information of the power battery single cell through the BMS, and detects the transient current, voltage and temperature values ​​​​of charging and discharging and their growth rates , as far as possible to ensure that the charging voltage or discharge voltage does not exceed the specified maximum or minimum limit voltage, and ensure that the temperature does not exceed the maximum value of the specified power battery normal temperature working range, so that the power battery can run healthily for a long time under normal working conditions .

[0032] When it is detected that the transient current value of charge and discharge does not exceed the maximum limit current value, if the charge and discharge voltage and temp...

Embodiment 2

[0035] Temperature abnormal early warning method for charging and discharging exceeding voltage limit

[0036] The temperature abnormality warning of charging and discharging exceeding the voltage limit is used to collect the current, voltage, temperature and internal resistance information of the single cell of the power battery through the BMS, and detect the transient current, voltage and temperature values ​​​​of charging and discharging and their growth. As far as possible, ensure that the charging current or discharging current does not exceed the specified maximum limit current, and ensure that the temperature does not exceed the specified maximum value of the normal temperature working range of the power battery, so that the power battery can run healthily for a long time under normal working conditions.

[0037] When it is detected that the charge and discharge voltage does not exceed the maximum or minimum limit voltage value, if the charge and discharge current and t...

Embodiment 3

[0041] Temperature abnormality early warning method in non-charging and discharging state

[0042] The above-mentioned abnormal temperature warning in the non-charging and discharging state collects information such as the temperature and internal resistance of the single cell of the power battery through the BMS, detects the transient temperature value and its growth rate, and ensures that the temperature does not exceed the specified limit as much as possible. The maximum value of the normal temperature working range of the power battery, so that the power battery can run healthily for a long time under normal working conditions.

[0043] When it is detected that the transient temperature value does not exceed the maximum value of the normal temperature operating range of the power battery, if the temperature growth rate is analyzed through the cloud platform, the temperature will not exceed its limit value within 10s, and the internal resistance of the battery is consistent....

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Abstract

The invention relates to an online safety pre-warning method of power batteries for an electric car based on a cloud platform and a battery management system. According to online safety pre-warning method, based on information such as the current, voltage, temperature and internal resistance, collected by the battery management system, of monomer battery cells of the power batteries and GPS information and the like, collected by a vehicle controller, of a power battery pack, a related safety model is built through analyzing and predicting of big data by the cloud platform; and real-time onlinesafety pre-warning prompting is conducted according to the manually set limiting conditions, and main safety pre-warning includes the following three aspects of temperature anomaly, phenomena of liquid leaking, ignition, explosion and the like, and position anomaly and stealing. Compared with the prior art, in the online safety pre-warning method, cloud calculation based on the big data and artificial intelligence is organically combined with the cloud platform and the battery management system which are built on the electric car, the influence factors of the safety anomaly are fully excavated and analyzed, the online pre-warning and protection functions are achieved, practicability is high, development of a pre-warning technology is greatly promoted, and operation reliability is greatlyimproved.

Description

[technical field] [0001] The invention relates to the field of safety early warning of power batteries for electric vehicles, in particular to an online safety early warning method for power batteries for electric vehicles based on a cloud platform and a battery management system. [Background technique] [0002] With the country's emphasis on new energy vehicles and lithium-ion power batteries, the production and sales of new energy vehicles (especially electric vehicles) have developed rapidly in recent years. However, with the explosive growth of electric vehicles, frequent safety accidents caused by power batteries have made people pay more and more attention to the safety of electric vehicles. [0003] The core components of electric vehicles are mainly three-electric systems, namely batteries, motors and electronic controls. The safety of electric vehicles is especially centered on the safety of power batteries. The safety of power batteries for electric vehicles mainl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18
CPCB60L2240/54B60L58/10Y02T10/70Y02T90/16
Inventor 张全生闵凡奇党国举周敦凡张绍乙张绍凡
Owner SHANGHAI ENNEAGON ENERGY TECH CO LTD
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