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Intelligent heating control method for charging of battery pack in low-temperature case

A technology of intelligent heating and control methods, applied in battery/fuel cell control devices, secondary batteries, circuits, etc., can solve problems such as accelerated battery life decay, battery overheating, and difficult temperature control of heaters, and improve the level of safety protection , The temperature control is precise, and the effect of water and electricity separation is realized

Active Publication Date: 2019-05-28
DONGFENG LIUZHOU MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an intelligent heating control method for battery packs at low temperatures, which can solve the difficulties in protection after electric leakage in the prior art, the difficulty in replacing the heater after it is broken, the difficulty in controlling the temperature of the heater, and the excessive temperature of the heater It will cause the battery to overheat and the temperature difference between the inside and outside of the battery is large, which will lead to the problem of accelerated battery life decay

Method used

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  • Intelligent heating control method for charging of battery pack in low-temperature case
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Examples

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Effect test

Embodiment 1

[0050] figure 2The intelligent heating control method shown in the case of low temperature of the battery pack is implemented by using a battery pack heating system, which includes a battery pack 1 and a battery pack controller for judging the working state of the battery pack. The battery pack 1 is equipped with The heat conduction waterway 2, the water inlet end of the heat conduction waterway 2 is connected with the water outlet end of the water pump 3, the water inlet end of the water pump 3 is connected with the water outlet end of the water tank 5 through the heater 4, the water inlet end of the water tank 5 is connected with the water outlet end of the heat conduction waterway 2 Connection; one end of the battery in the battery pack 1 is connected to an output terminal of the vehicle charger 6 through the normally open contact of the first relay 9 and the normally open contact of the third relay 11 in turn, and the other end of the battery is connected through the secon...

Embodiment 2

[0086] figure 2 The intelligent heating control method shown in the case of low temperature of the battery pack is implemented by using a battery pack heating system, which includes a battery pack 1 and a battery pack controller for judging the working state of the battery pack. The battery pack 1 is equipped with The heat conduction waterway 2, the water inlet end of the heat conduction waterway 2 is connected with the water outlet end of the water pump 3, the water inlet end of the water pump 3 is connected with the water outlet end of the water tank 5 through the heater 4, the water inlet end of the water tank 5 is connected with the water outlet end of the heat conduction waterway 2 Connection; one end of the battery in the battery pack 1 is connected to an output terminal of the vehicle charger 6 through the normally open contact of the first relay 9 and the normally open contact of the third relay 11 in turn, and the other end of the battery is connected through the seco...

Embodiment 3

[0122] figure 2 The intelligent heating control method shown in the case of low temperature of the battery pack is implemented by using a battery pack heating system, which includes a battery pack 1 and a battery pack controller for judging the working state of the battery pack. The battery pack 1 is equipped with The heat conduction waterway 2, the water inlet end of the heat conduction waterway 2 is connected with the water outlet end of the water pump 3, the water inlet end of the water pump 3 is connected with the water outlet end of the water tank 5 through the heater 4, the water inlet end of the water tank 5 is connected with the water outlet end of the heat conduction waterway 2 Connection; one end of the battery in the battery pack 1 is connected to an output terminal of the vehicle charger 6 through the normally open contact of the first relay 9 and the normally open contact of the third relay 11 in turn, and the other end of the battery is connected through the seco...

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Abstract

The invention discloses an intelligent heating control method for charging of a battery pack in a low-temperature case, and relates to the technical field of manufacturing of an electric vehicle. Theintelligent heating control method comprises the following implementation steps: 1, determining whether application of a high voltage for charging is met or not; 2, determining whether the battery pack allows to be charged or heated or not; 3, determining whether the battery pack needs to be heated; or not 4, determining whether external charging equipment meets a heating requirement or not; 5, determining whether only heating is allowed or not; 6, determining whether to end heating or not. The invention can solve prior-art problems of difficulty in protection after electric leakage, difficulty in replacement after a heater has a failure, difficulty in control on a temperature of the heater and attenuation acceleration of a battery life, which are caused by battery overheating, and a largeinternal and external temperature difference of the battery due to the excessively high temperature of the heater.

Description

technical field [0001] The invention relates to the technical field of electric vehicle manufacturing, in particular to an intelligent heating control method for a battery pack at low temperature. Background technique [0002] The battery is charged slowly at low temperature, and the charging service life of the battery at low temperature decays faster than above 0°C, and it cannot be charged at extremely low temperature. In order to increase the charging speed of the battery and slow down the degradation of the battery, it is necessary to heat the battery pack. Currently commonly used battery heating schemes such as figure 1 Shown: [0003] A high-voltage resistance heater 15 is pasted on the cell casing, and the battery pack 1 is discharged to the heater, and the heater then heats the battery. This method of heating the battery pack has the following problems: [0004] 1. The use of direct resistance heaters for heating has extremely high requirements on the high-volta...

Claims

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Application Information

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IPC IPC(8): B60L58/27H01M10/615H01M10/625H01M10/633H01M10/635H01M10/6556H01M10/6567
CPCY02T10/70
Inventor 何佳健邹姚辉李东萍南银姬卢楚辉梁冬妮李强韦杰宏伍健丁磊
Owner DONGFENG LIUZHOU MOTOR
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