Dual circulation-based power battery pack thermal management system

Abstract

The invention discloses a dual circulation-based power battery pack thermal management system. The dual circulation-based power battery pack thermal management system comprises a battery pack thermalmanagement system (BMS), a thermal management controller, a compressor, a PTC heater A and a PTC heater B, wherein one end of the battery pack BMS is connected with a battery pack water inlet temperature sensor, the other end of the battery pack BMS is connected with a battery pack water outlet temperature sensor, one side of the battery pack water inlet temperature sensor is connected with a three-way converter valve B, one side of a three-way converter valve A is connected with a cooler, the other side of the three-way converter valve A is connected with a battery heat sink, the compressor is connected with one side of the battery heat sink, one side of the compressor is connected with an electric water pump A, the other side of the compressor is connected with the cooler, and the PTC heater B is connected with one side of the electric water pump A. With the dual circulation-based power battery pack thermal management system, the problem of heating and cooling of a battery pack is solved, and the energy consumption of the compressor can be reduced to the greatest extent by introduction of dual circulation in a cooling working condition.

Description

technical field [0001] The invention relates to the technical field of thermal management of electric vehicles, in particular to a power battery pack thermal management system based on double cycles. Background technique [0002] Electric vehicle thermal management technology has a short history and is an emerging technology. Lithium-ion batteries are widely used in the batteries of electric vehicles, passenger cars or commercial vehicles. Lithium-ion batteries are highly sensitive to temperature, and the optimum operating temperature range for lithium-ion batteries is between 15°C and 30°C. It cannot be charged and discharged normally below 0°C or above 45°C. In order to allow the battery to work normally at a wider temperature, the currently commonly used technology is to install a heating film and air duct in the battery module. This technology has the shortcomings of uneven heating temperature, which leads to excessive temperature difference of the battery core, compl...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a power battery pack heat management system based on double circulation, which solves the problem of heating and cooling the water-cooled battery pack, and introduces double circulation in the cooling condition to minimize the energy consumption of the compressor

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