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Power battery temperature monitoring method and device, vehicle and storage medium

A technology for power batteries and vehicles, applied in the fields of vehicles, power battery temperature monitoring, and storage media, can solve problems such as loss and lag, and achieve the effect of improving accuracy, accurate judgment results, and reducing the probability of false alarms.

Active Publication Date: 2020-11-10
GUANGZHOU XIAOPENG MOTORS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] There are obvious problems in the existing technology. For example, the alarm time is usually when the temperature is too high, and there is a problem of hysteresis. At the same time, the temperature is too high and the alarm is too late to easily cause other losses.

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  • Power battery temperature monitoring method and device, vehicle and storage medium
  • Power battery temperature monitoring method and device, vehicle and storage medium
  • Power battery temperature monitoring method and device, vehicle and storage medium

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] It should be noted that the terms "first", "second", "third" and "fourth" in the specification and claims of the present invention are used to distinguish different objects, rather than to describe specific order. The terms "comprising" and "having" and any variations thereof in the embodiments of the present invention are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps ...

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Abstract

The embodiment of the invention relates to the field of power batteries, in particular to a power battery temperature monitoring method and device, a vehicle and a storage medium, and the method comprises the steps: obtaining a difference value delta(T) between the highest battery cell temperature Tmax and the lowest battery cell temperature Tmin in a power battery system according to a preset period; judging whether the difference value delta(T) meets a difference value alarm condition or not; when the difference value delta(T) meets a difference value alarm condition, obtaining a temperaturerise value Tu of the Tmax; judging whether a temperature rise value alarm condition is met or not according to the temperature rise value Tu and a preset temperature rise value threshold T2; when thetemperature rise value alarm condition is met, carrying out the temperature rise value condition alarm. According to the power battery temperature monitoring method provided by the embodiment of theinvention, whether the temperature of the power battery is abnormal or not can be judged in advance by continuously monitoring the temperature of the power battery, and various damages caused by abnormal judgment only when the temperature is too high are prevented. Through the two-stage judgment mode, the judgment result can be more accurate, the probability of false alarm is reduced, and the alarm accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a power battery temperature monitoring method and device, a vehicle, and a storage medium. Background technique [0002] At present, the power battery systems used in new energy vehicles mostly use temperature sensors in the batteries or battery modules for temperature monitoring, and rely on BMS (battery management system, battery management system) to monitor them. Classified fault alarms based on the difference. The BMS itself does not store historical data. Policy decisions usually only refer to short-term (for example, within 5 seconds) semaphores, and the temperature signal needs to reach a higher value, such as 50°C, to alarm. [0003] There are obvious problems in the prior art. For example, the alarm time is usually when the temperature is already too high, so there is a problem of hysteresis. At the same time, the temperature is too high and the alarm is too la...

Claims

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Application Information

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IPC IPC(8): B60L58/10B60L58/24H01M10/48
CPCB60L58/10B60L58/24H01M10/486Y02T10/70Y02E60/10
Inventor 郑立奇
Owner GUANGZHOU XIAOPENG MOTORS TECH CO LTD
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