CTC battery system pressure detection device and use method thereof

Abstract

The invention discloses a CTC battery system pressure detection device and a use method thereof, and relates to the technical field of lithium ion battery system safety detection, and the CTC battery system pressure detection device comprises an upper cover with a bottom plate at the bottom, and a plurality of groups of strain gauge mechanisms. A creepage distance and an electrical gap from a battery to a battery pack upper cover or a passenger compartment floor are analyzed by collecting Z-direction deformation quantity of a CTC battery system upper cover in real time, the safety performance of the high CTC battery system and a whole vehicle is comprehensively judged by combining insulation resistance of the battery system, risks are reduced, and the safety of the battery system is improved through resistance of a metal resistance strain gauge detected by a battery management system. The maximum Z-direction deformation quantity of the upper cover structure of the CTC battery system is obtained, the insulation resistance value of the CTC battery system is measured through a battery management system, and safety ranges such as an electric gap, a creepage distance and insulation resistance between a charged part and an uncharged metal part in the system are obtained in combination with a voltage platform of the CTC battery system. The bearing condition of the battery system upper cover and the battery system insulation state are monitored in real time.

Description

Technical field [0001] The present invention belongs to the technical safety detection field of lithium ion battery system, and is specifically a CTC battery system pressure detecting device and the method of use. Background technique [0002] In 2019, the Department of Working in China issued the "New Energy Automobile Industry Development Plan (2021-12035)", which proposes that my country's new energy vehicle penetration will reach 25% in 2025, and this share is only 4.7% in 2019, 2020, my country's new energy The automotive sales of 1.367 million, the penetration rate is increased to 5.4%, in the context of the development of China's new energy vehicle market, the market size growth potential of the power battery system is huge, the technical optimization of the battery system and the application of new technology applications for improved electric vehicle economics Lightweight, there is a significant significance, November 2020, the State Council issued the "New Energy Automo...

AI Technical Summary

Problems solved by technology

[0004] As the structure of the passenger compartment floor, the upper cover of the battery pack will inevitably bear loads and cause Z-direction deformation. Since the upper cover of the battery pack or the floor of the passenger compartment is generally a metal part, the deformation will cause the creepage distance from the battery to the upper cover of the battery pack or the floor of the passenger compartment to be different from that of the The reduction of the electrical gap will easily lead to a decrease in the insulation resistance of the whole vehicle, and it will cause high-voltage leakage to threaten the safety of the occupants in the passenger compartment. Long-term exposure to Z-direction pressure will affect the cycle life of the battery and the service life of the vehicle if it is light, or cause liquid leakage from the battery cell, which will trigger thermal runaway and cause fire and explosion, which poses a great safety hazard

[0005] Based on the above-mentioned technical problems such as insulation, electric leakage, and battery cell leakage due to the deformation of the upper cover of the CTC battery system, there is no relevant solution, so it is urgent to find an effective solution to solve the above problems

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