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Power battery overheating determination method, device, and vehicle having the same

A power battery and judging device technology, applied in the field of vehicles, can solve the problems of rising surface temperature, reducing the real-time performance and accuracy of judgment, and failing to protect battery reliability well, so as to improve real-time performance and accuracy, Prevents battery damage and ensures reliability

Inactive Publication Date: 2015-08-12
BEIJING BORGWARD AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it takes a certain amount of time for the temperature sensor to respond to the temperature to detect the increase in surface temperature caused by battery overheating, and when the internal heat of the battery cell is very large, it also takes a certain amount of time to transfer the heat to the battery surface, and there is no such thing in the related art The thermal load of the current is monitored in advance, and the current is not limited, so that it is impossible to prevent the battery from being damaged due to overheating inside the battery cell, which reduces the real-time and accuracy of judgment, and cannot protect the battery well and guarantee the battery. reliability

Method used

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  • Power battery overheating determination method, device, and vehicle having the same
  • Power battery overheating determination method, device, and vehicle having the same
  • Power battery overheating determination method, device, and vehicle having the same

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Embodiment Construction

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0029] In the present invention, unless otherwise clearly specified...

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Abstract

The invention discloses a power battery overheating determination method, a power battery overheating determination device, and a vehicle having the same. The power battery overheating determination method comprises the following steps: acquiring current value of a power battery in a predetermined time period; calculating thermal load value of the power battery according to the current value, and correcting the thermal load value; acquiring current temperature; determining the charging current limited value or the discharging current limited value of the power battery according to the corrected thermal load value and the current temperature; and carrying out the charging or discharging control of the power battery according to the charging current limited value or the discharging current limited value. The power battery overheating determination method is advantageous in that the thermal load value and the current temperature of the power battery can be calculated in a real-time manner, and therefore the charging or discharging control can be carried out by determining the current limited value of the power battery according to the thermal load value and the current temperature, the prevention object can be realized, the regular correction of the thermal load value of the battery can be realized, the real-time performance and the accurate performance of the determination can be improved, the battery can be well protected, and the reliability of the battery can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a method and device for judging overheating of a power battery and an automobile having the same. Background technique [0002] Power batteries such as lithium-ion power batteries have the characteristics of high specific energy, good cycle performance and low self-discharge, thus becoming the dominant power source of hybrid electric vehicles and electric vehicles. However, the temperature rise of the lithium-ion power battery itself poses a great threat to the safety of the battery, and also has a great impact on the performance of the battery, so it is also crucial to the thermal management of the battery. [0003] In the related art, the temperature of the battery is detected by a temperature sensor, so as to obtain the state of the battery to determine whether the battery is overheated, and then perform related thermal management. However, it takes a certain amount of time ...

Claims

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Application Information

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IPC IPC(8): G01R31/36H02J7/00
Inventor 李旭影乔贞美左从兵陈小江
Owner BEIJING BORGWARD AUTOMOBILE CO LTD
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