Power battery thermal management system

Abstract

The invention discloses a power battery thermal management system, which mainly comprises power batteries, heat conducting devices, a liquid cooling plate, a control system and a heat dissipating device, wherein at least one group of heat conducting devices are arranged between the power batteries; each heat conducting device comprises a heat conducting graphite plate, a heat pipe embedded in the liquid cooling plate and fins; a heat conducting device mounting hole is disposed on the liquid cooling plate; a coolant flow channel is disposed in the liquid cooling plate; the rest part of the liquid cooling plate is filled with a phase change material; the liquid cooling plate is in communication with the heat dissipating device to form a heat dissipating circuit; the control system is configured to drive the coolant and control the circuit in which the coolant is located. The power battery thermal management system has high heat storage and heat dissipation efficiency, saves energy, improves the energy density of the battery pack, ensures that the power batteries are in a suitable temperature range in operation, and achieves the temperature consistency of the power batteries.

Description

technical field [0001] The invention relates to the technical field of thermal management, in particular to a thermal management system of a power battery. Background technique [0002] In 2016, the Society of Automotive Engineers of China released the "Technology Roadmap for Energy-Saving and New Energy Vehicles" (hereinafter referred to as the "Roadmap"), which outlined the blueprint for the development of my country's new energy vehicle technology in the next 15 years. The energy density of the power battery system of the components reaches 260W h / kg, and the energy density of the single cell reaches 350W h / kg. With the improvement of energy density, the power battery will release more heat during the working process, and the stability of the material will deteriorate, which will affect the performance and service life of the battery pack, and ultimately increase the cost of electric vehicles. [0003] A typical liquid-cooled heat dissipation method for power batteries is...

AI Technical Summary

Problems solved by technology

With the improvement of energy density, the power battery will release more heat during the working process, and the stability of the material will deteriorate, which will affect the performance and service life of the battery pack, and ultimately increase the use cost of electric vehicles

[0003] A typical liquid-cooled heat dissipation method for power batteries is that the liquid-cooled plate is arranged under the battery module. The heat conduction efficiency of the structure is low, and the temperature difference between the battery cells is increased at the same time, thereby reducing the discharge capacity of the battery pack and affecting the cruising range of the power battery

[0004] Patent authorization announcement number CN207250604U, the date of authorization announcement is April 17, 2018. The name of the invention is a thermal management component of the battery pack box. The application discloses a battery pack box based on liquid cooling and heat dissipation. The advantage is that the liquid cold plate is used to dissipate heat, but the heat conduction efficiency between the battery and the liquid cold plate is low, and the temperature distribution of the battery is uneven

[0005] Patent authorization announcement number CN204947037U, authorization announcement date January 6, 2016, the name of the invention is a battery water-cooled radiator, its shortcomings: 1, low heat dissipation efficiency and uniform heat dissipation; 2 completely rely on liquid cooling heat dissipation, can High consumption

Images