Heat exchanger with built-in PTC heating element

Abstract

The invention belongs to the technical field of new energy electric vehicle accessories, and particularly relates to a heat exchanger with a built-in PTC heating element. The heat exchanger is characterized in that the middle of a rectangular heat exchange plate (1) is divided into an upper cavity (1-3), a hollow cavity (1-4), and a lower cavity (1-5) by a first interval (1-1) and a second interval (1-2); a heat-conductive silicone pad (6) is arranged on the side surface of the heat exchange plate (1); the heat-conductive silicone pad (6) is pressed on a battery module (7); the PTC heating element (2) is arranged in the upper cavity (1-3) and / or the lower cavity (1-5); a lead wire (4) passes through the head of the upper cavity (1-3) and / or the lower cavity (1-5) and is connected with thePTC heating element; a flow channel cavity (5) is set in the hollow cavity (1-4); a water nozzle (3) passes through the head of the intermediate cavity (1-4) and is in communication with the flow channel cavity (5). According to the invention, the two-way heat exchange problems of low temperature rise rate of a cell, heating and cooling in a cold environment are solved by the way that the flow channel cavity is in the middle and the PTC heating element is on the upper or lower end.

Description

technical field [0001] The invention belongs to the technical field of new energy electric vehicle accessories, and in particular relates to a heat exchanger with a built-in PTC heating element, in particular to a heat exchanger structure of a novel lithium-ion soft pack battery module. Background technique [0002] Lithium-ion power batteries have been widely used in the field of new energy electric vehicles. At present, during the use of the user, it is inevitable to encounter severe cold weather, and even work for a long time under extremely cold temperature conditions. The ambient temperature of the battery is low, which has a great impact on the battery life and charge and discharge capacity. . Therefore, in the actual use of the battery, how to quickly and effectively heat the battery to a temperature level that can work normally has always been a key issue in our technical research. [0003] Existing PTC heaters are usually mixed with cooling devices and applied to ...

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Problems solved by technology

[0004] In view of the above technical problems, the present invention provides a structure in which the cooling liquid is in the middle and the heating PTC is on both sides, so that the structure is simple, the arrangement is convenient, and the cooling efficiency is high. The problem of difficult heating and low temperature rise rate of lithium batteries in the existing technology has greatly improved the ability of the battery to adapt to low temperature and cold environments. Through the invention and transformation of the same part, the two-way function of heating and cooling the battery has been realized.

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