Battery cell simulator of power battery pack and corresponding BMS detection platform

Abstract

The present invention discloses a battery cell simulator of a power battery pack, which can simulate complex characteristics of a power battery in a dynamic state, high stability in a static state and a heavy-current charge and discharge capability. The battery cell simulators can be connected in series to work, and each pair of the battery cell simulators needs to isolate with each other, so as to meet the requirements of different detected objects. When the battery cell simulator is used for detecting a BMS, voltage and current outputted by the battery cell simulator is controlled by programming, thus a flexible and strict solution can be provided for test; in addition, the battery cell simulator can simulate a test condition in an extreme case, such as high inconsistency of high temperature or low temperature operation, heavy-current charge and discharge, battery pack capacity, SoC, and SOH, cannot cause permanent damage to equipment, and cannot cause safety hidden trouble; and the battery cell simulator is low in energy consumption, convenient in test, good in repeatability and can simulate a fault state.

Description

technical field [0001] The invention relates to a single battery simulator of a power battery pack and a BMS detection platform using the single battery simulator. Background technique [0002] In electric vehicles, BMS not only has diverse and complex functions, but also controls the use process of the battery pack. Its performance will directly affect the safety, efficiency, cycle life, and personal safety of the battery pack. [0003] Just because BMS bears such a heavy responsibility, it needs to be strictly tested in the development stage of BMS. At the same time, after the product design is formed, it still needs to be strictly tested in accordance with the relevant national testing standards. [0004] The existing BMS detection technology solutions generally have the following two types. One of the test schemes is to directly connect the BMS to the real battery pack, install it on the vehicle as a part of the battery pack, put the electric vehicle on the hub or in th...

AI Technical Summary

Problems solved by technology

However, using a real battery pack to simulate the complex working conditions of an electric vehicle, the power battery pack needs to operate at a power of several kilowatts or tens of kilowatts, so it needs to dissipate a lot of energy; and directly use a real battery pack to simulate various The detection of working conditions will not only cause permanent capacity loss to the power battery pack, but also have disadvantages such as long charge and discharge time, unsuitable for long-term repeated cycle tests, difficulty in simulating fault states, and poor repeatability and controllability.

Images