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Low-temperature protection system and method for battery of electric automobile

A technology for low-temperature protection and electric vehicles, applied in electric vehicles, secondary batteries, battery/fuel cell control devices, etc., can solve problems such as abnormal discharge of vehicles, and achieve the effect of meeting travel needs

Active Publication Date: 2018-09-04
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is used to solve the problem that vehicles cannot be normally discharged under extreme cold conditions, breaks the restriction of battery discharge prohibition in traditional extreme cold environments, and reduces the waiting time for heating to a certain extent, meeting the travel needs of users

Method used

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  • Low-temperature protection system and method for battery of electric automobile
  • Low-temperature protection system and method for battery of electric automobile

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Experimental program
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Embodiment Construction

[0025] The electric vehicle battery preheating system of the present invention uses the battery or charging equipment to provide a suitable heating current to realize the function of preheating before discharging or keeping warm after being fully charged under extremely cold temperature conditions.

[0026] This solution can make the electric vehicle use battery or charging equipment to supply power when the outside temperature is lower than -30℃, to heat the heating equipment in the battery pack, to preheat before completion of discharge or keep it warm after full charge, so as to ensure that the electric vehicle battery is in It can discharge normally under extreme cold temperature conditions. The specific technical solutions are as follows:

[0027] 1. Based on the existing charge and discharge strategy, design a new low temperature preheating strategy;

[0028] 2. Determine the heating temperature range according to the actual use environment of the electric vehicle;

[0029] 3. ...

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Abstract

The invention discloses a low-temperature protection system for a battery of an electric automobile. A temperature sensor for acquiring the temperature of an electric core is arranged in a battery system assembly and outputs a temperature signal to a battery management system; heating equipment for heating the electric core is arranged in the battery system assembly; a total negative line of a battery pack of the electric core is connected with a negative electrode of a discharge port through a related relay 3; a total positive line of the battery pack of the electric core is connected with apositive electrode of the discharge port through a related relay 2 and a related relay 4 which are connected in parallel; after being connected with a related relay 1 in series, the heating equipmentis connected with the two ends of the related relay 3 and the electric core; the battery management system outputs a drive signal to the related relay 1, the related relay 2, the related relay 3 and the related relay 4. The low-temperature protection system disclosed by the invention can realize the aim of normal discharge in an extreme cold environment through low-temperature preheating, better meets the travel needs of a user and is more realistic.

Description

Technical field [0001] The invention relates to the field of electric vehicles, in particular to the preheating technology of electric vehicle batteries in a low-temperature environment. Background technique [0002] In recent years, electric vehicles have developed in a blowout pattern. With the increasing market share, the sales area has become more and more extensive. Among them, there are many cities in the Northeast where the lowest temperature in winter reaches -30°C or less. During the use of electric vehicles, due to the influence of battery materials, discharge is prohibited in a low temperature environment below -30°C, which brings a lot of inconvenience to the user's travel in a low temperature environment. [0003] In the current low temperature environment, since the discharge of batteries below -30°C is prohibited, which completely deviates from the user's concept of fast and convenient travel. In order to prevent users from complaining, the only way to cancel the lau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/615H01M10/625H01M10/635B60L11/18
CPCB60L58/27H01M10/615H01M10/625H01M10/635Y02E60/10Y02T10/70Y02T90/40
Inventor 黄芳芳王恒吴亚东宋开通曾祥兵
Owner CHERY AUTOMOBILE CO LTD
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