High-low-temperature simulation system and method used for simulating thermistor detection

Abstract

The invention provides a high-low-temperature simulation system used for simulating thermistor detection. The system includes an upper computer, a communication module, a main control module, a plurality of relay switches and a plurality of resistors in one-to-one correspondence with the plurality of relay switches, wherein the upper computer is connected with the main control module through the communication module; the main control module is connected with the plurality of relay switches; and the plurality of resistors are connected in sequence, and the relay switches are connected to two ends of the resistors in parallel. The invention also includes a method used for simulating thermistor detection, a resistance value can be preset according to temperature required by testing, and when the switches are switched, a temperature signal changes instantly, thereby solving the problem that temperature change time is long, and improving the speed of a high-low-temperature protection test; neither heating nor refrigeration is needed, thereby solving the problem of large energy consumption; and passive resistors are adopted, so high temperature is not generated actually, thereby solving the problem of high temperature scalding risks.

Description

technical field [0001] The invention relates to the field of temperature protection testing of lithium battery packs, in particular to a high and low temperature simulation system and method for simulating thermistor detection. Background technique [0002] Due to the electrochemical activity of lithium batteries and high energy density, in order to use lithium batteries safely, users will configure corresponding BMS (Battery Management System, battery management system) for power management and safety protection. Both safety protection and power management are related to temperature. Common BMSs use thermistors (NTC) as temperature sensors for detection. BMSs for power batteries and new energy vehicle batteries generally have a large number of temperature acquisition channels. To ensure safety High and low temperature protection tests are required for each channel. The current test is to use a constant temperature bath to conduct temperature protection tests on the BSM. Th...

AI Technical Summary

Problems solved by technology

[0003] 1. It takes a long time to change the temperature, and the operation is inconvenient, which is not conducive to rapid batch testing;

[0004] 2. Whether it is heating or cooling, it takes a lot of energy;

[0005] 3. Large volume, high temperature, there is a risk of burns

Images