A ptc heater and power battery heating and cooling device

Abstract

The invention discloses a PTC heater and a power battery heating and cooling device. The PTC heater comprises a shell as well as an integrated circuit board and a heater body inside, wherein the inner heater body comprises a PTC heating body, an aluminum structural part, a sealing ring and a sealing cover, wherein the aluminum structural part, the sealing ring and the sealing cover are combined to form a liquid pipeline; a first turbulent flow sheet is arranged on the aluminum structural part; the PTC heating body is laminated with the aluminum structural part; the power battery heating and cooling device mainly comprises the PTC heater, a water pump, a refrigerating fluid tank, a battery pack liquid cooling plate, a heat radiator as well as a compressor refrigeration system, wherein a battery heating circulation system and a battery cooling circulation system are formed. By adopting the PTC heater, the problem of power battery heat management can be effectively solved, a power battery can be both effectively cooled as a whole in a severe heat environment and effectively heated in a low-temperature environment, and good security and working properties of the battery can be ensured.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a PTC heater and a power battery heating and cooling device. Background technique [0002] With the development of science and technology, new energy uses power lithium batteries as the power source, and the working temperature range of power lithium batteries is generally 5 to 45°C. When charging and discharging power batteries in high temperature environments, due to untimely and uneven heat dissipation, it will As a result, the local temperature of the battery pack rises rapidly, causing serious accidents; and when the power battery is in a low-temperature environment, the charging and discharging performance of the battery is significantly attenuated, and even cannot work normally. Therefore, effective thermal protection of the power battery is an important condition to ensure the normal operation of the power battery. For example, in winter in the north, the power ba...

AI Technical Summary

Problems solved by technology

For example, when the power battery is working in a harsh thermal environment, it will be difficult to control the optimal working temperature of the battery if only relying on air cooling, and at the same time, it cannot guarantee the temperature consistency between the batteries, which will reduce the performance of the battery and shorten the life of the battery. shorten

In addition, the heating method of the power battery usually uses an electric heating film or a PTC heating plate directly installed on the surface of the battery for heating. This heating method has low heating efficiency and cannot guarantee the consistency of the temperature between the batteries.

Images