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A control method of a power battery thermal management system

A thermal management system and power battery technology, applied in battery temperature control, secondary batteries, circuits, etc., can solve problems such as energy waste, affecting battery operating efficiency and life, thermal management system operation lags behind power battery temperature changes, etc., to achieve ensure high efficiency

Inactive Publication Date: 2019-01-18
HANYU GRP CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the control methods adopted by most thermal management systems are passive control methods. When the temperature T of the power battery is higher than the start-up temperature T1, the thermal management system is turned on, and when the temperature T of the power battery is lower than the shutdown temperature T2, the thermal management system is turned off. Assess the heat consumption trend of the power battery. The operation of the thermal management system lags behind the temperature change of the power battery, resulting in energy waste. Even the temperature T of the power battery cannot be continuously stabilized within a suitable temperature range, which affects the operating efficiency and life of the battery.

Method used

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  • A control method of a power battery thermal management system
  • A control method of a power battery thermal management system
  • A control method of a power battery thermal management system

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Embodiment Construction

[0039] refer to figure 1 , a power battery thermal management system, including a heat exchanger 33, a water pump 32, an expansion tank 31, a power battery 10, a heater 34, a solenoid valve 35, a compressor 21, a condenser 22 and an evaporator 23, the heat exchange The device 33 includes a first passage and a second passage. The compressor 21, the condenser 22, the evaporator 23, the solenoid valve 35 and the first passage are connected through a refrigerant pipeline 201 to form a refrigerant circulation loop. The expansion tank 31, the water pump 32 , the second channel, the heater 34 and the traction battery 10 are connected through the coolant pipeline 301 to form a coolant circulation loop.

[0040] refer to figure 2 , a control method of a power battery thermal management system of the present invention, comprising the following steps:

[0041] Step S1: Detect the battery temperature T of the power storage battery 10, when the battery temperature T is greater than the ...

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Abstract

The invention discloses a control method of a power battery thermal management system, in the on and off conditions of the power battery thermal management system, the assessment and calculation of heat consumption trends are added, From the original passive control mode based only on the battery temperature T to the mode of actively evaluating the operating conditions of the power battery in advance, the battery thermal management can be more effectively and energy-saving, so as to ensure that the operation of the thermal management system does not lag behind the change of the battery temperature T too much, and to ensure the battery high efficiency and long life operation.

Description

technical field [0001] The invention relates to the technical field of power battery thermal management, in particular to a control method for a power battery thermal management system. Background technique [0002] As the power source of electric vehicles, the power battery has a large capacity and output power. When the power battery is running at a high rate and in an extreme environment, it will generate a lot of heat. If the heat cannot be dissipated in time, the temperature of the battery will rise rapidly. Excessive temperature will lead to a decrease in the cycle life of the battery, a serious decline in electrochemical performance, and even safety problems such as "thermal runaway". Therefore, it is essential to adopt a reasonable thermal management system and control method to improve the cycle life and safety of the power battery. [0003] At present, the control methods adopted by most thermal management systems are passive control methods. When the temperature...

Claims

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Application Information

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IPC IPC(8): H01M10/625H01M10/63
CPCH01M10/625H01M10/63Y02E60/10
Inventor 孙永贤
Owner HANYU GRP CO LTD
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