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Temperature regulation system and control method for power battery

A power battery and temperature regulation technology, which is 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 achieves improved equilibrium efficiency, improved energy utilization rate, The effect of increasing power

Active Publication Date: 2021-05-18
SAIC MOTOR
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  • Summary
  • 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 regulation system and control method for power battery
  • Temperature regulation system and control method for power battery
  • Temperature regulation system and control method for power battery

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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Abstract

The present application discloses a temperature adjustment system for a power battery, comprising: a first cooling device, a second cooling device, a cooler, a liquid accumulator, a water pump, a first electronic three-way valve, a second electronic three-way valve, a third The electronic three-way valve, the fourth electronic three-way valve and the control device; when the power battery needs to be heated, the control device adjusts the connection state of the four electronic three-way valves, in the first cooling device, the second cooling device and the storage device. A passage is formed between the liquid containers, and the power battery is heated by the heat generated by the equalizing resistance and the solid state relay group, and the cooling treatment of the equalizing resistance and the solid state relay group is realized at the same time. Based on the temperature regulation system disclosed in the present application, the power battery can be heated without setting a PTC resistor, the energy utilization rate is improved, and the balance 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 Patents(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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