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Temperature adjusting system of power battery and control method thereof

A power battery and temperature regulation technology, applied in battery/fuel cell control devices, secondary batteries, circuits, etc., can solve the problems of increasing system cost and low energy utilization rate, and achieve improved balance efficiency, energy utilization rate, The effect of increasing power

Active Publication Date: 2020-09-29
SAIC MOTOR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this processing method has the problem of low energy utilization, and additional PTC resistance is required, which increases the system cost

Method used

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  • Temperature adjusting system of power battery and control method thereof
  • Temperature adjusting system of power battery and control method thereof
  • Temperature adjusting system of power battery and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0062] As an implementation, the control device compares the temperature of the power battery with the preset high temperature threshold and low temperature threshold, and if the temperature of the power battery is higher than the preset high temperature threshold, it is determined that the power battery needs to be cooled. If the temperature is lower than the preset low temperature threshold, it is determined that the power battery needs to be heated. Certainly, the control device may also use other methods to determine whether to perform heating or cooling treatment on the power battery.

[0063] Step S103: When the control device determines that the power battery needs to be heated, it controls the opening of the first port and the third port of the first electronic three-way valve 601 and the closing of the second port, and controls the opening of the second electronic three-way valve 602. The second port and the third port are opened, the first port is closed, the first p...

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PUM

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Abstract

The invention discloses a temperature adjusting system of a power battery. The temperature adjusting system comprises a first cooling device, a second cooling device, a cooler, a liquid storage device, a water pump, a first electronic three-way valve, a second electronic three-way valve, a third electronic three-way valve, a fourth electronic three-way valve and a control device. When the power battery needs to be subjected to heating treatment, the control device adjusts the communication states of the four electronic three-way valves to form a passage among the first cooling device, the second cooling device and the liquid storage device; and heat generated by the balance resistor and the solid-state relay set is used for heating the power battery, and meanwhile, cooling treatment on thebalance resistor and the solid-state relay set is achieved. Based on the temperature adjusting system disclosed by the invention, the heating treatment of the power battery is realized on the premiseof not arranging a PTC resistor, so that the energy utilization rate is improved, and the equalization efficiency of the power battery is improved.

Description

technical field [0001] The present application belongs to the technical field of automobile batteries, and in particular relates to a power battery temperature regulation system and a control method thereof. Background technique [0002] With the popularization of electric vehicles, users have higher and higher requirements on the power performance and battery life of vehicles. The power batteries in electric vehicles usually use lithium batteries. The electrochemical activity of lithium batteries is reduced in low temperature environments, and their energy and power densities are greatly reduced. Therefore, it is necessary to design a heating system for the power battery to ensure that the power battery still has good performance at low temperatures. [0003] At present, for the heating system of the power battery of an electric vehicle, a PTC resistor (positive temperature coefficient thermistor) is usually used to directly heat the power battery. However, this processi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/615H01M10/613H01M10/625H01M10/6567H01M10/6568H01M10/667B60L58/26B60L58/27
CPCH01M10/613H01M10/615H01M10/625H01M10/6567H01M10/6568H01M10/667Y02E60/10Y02T10/70
Inventor 陆珂伟王林李骥赵小巍
Owner SAIC MOTOR
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