Lithium ion battery module safety protection system

Abstract

The invention discloses a lithium ion battery module safety protection system. The system comprises a battery management system circuit board, a safety protection circuit, a plastic fastening member, a flame retardation air bag and static isolation pads, wherein the battery management system circuit board is separately connected with the safety protection circuit, an equalization circuit, lithium ion soft single electric cores, a temperature sensor, a current sensor and a voltage sensor, the safety protection circuit realizes on and off through an electronic switch, the plastic fastening member is arranged between the lithium ion soft single electric cores and a battery module casing, the flame retardation air bag is arranged between the plastic fastening member and the battery module casing, all the lithium ion soft single electric cores of the battery module are divided into multiple groups which are consistent in number, and the static isolation pads are respectively arranged between every two lithium ion soft single electric cores and are tightly connected with the two-side lithium ion soft single electric cores. The system is advantaged in that the safety protection function of the battery module can be realized under multiple conditions, such as over-current over-voltage protection, high low temperature protection, flame retardation protection, electrostatic protection and expansion protection.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery module safety protection, in particular to a lithium-ion battery module safety protection system. Background technique [0002] In recent years, environmental pollution and energy depletion have attracted increasing attention. With the continuous progress of new high-energy secondary battery technology, especially lithium-ion power battery technology, the development and development of electric vehicle technology represented by electric bicycles and electric vehicles Promotional applications are gaining more and more attention. [0003] The battery systems required by electric vehicle manufacturers tend to be integrated and high-energy, that is, to arrange as many batteries as possible in a limited space. Compared with lead-acid and nickel-metal hydride batteries, lithium-ion new high-energy secondary batteries have the characteristics of high specific energy, no environmental polluti...

AI Technical Summary

Problems solved by technology

[0004] Lithium-ion batteries are prone to overcurrent and overvoltage during charging and discharging. Lithium-ion batteries will generate heat during use. When the heat of the battery cannot be released in time, overtemperature will occur, resulting in overcurrent, overvoltage, overtemperature, etc. Security Risk

If the circuit cannot be cut off in time when over-current, over-voltage, or over-temperature occurs, there is a risk of damage to the battery and components, and in severe cases, combustion and explosion may occur

[0005] During the use of lithium-ion battery modules, extreme situations such as collisions, punctures, and short circuits may occur due to various abnormal reasons. If the contact with the outside air is not blocked in time, major accidents such as combustion and explosion may occur

[0006] When the non-insulator shell lithium-ion batteries (cells) are stacked in series, static electricity will be generated, and the number of lithium-ion batteries (cells) stacked in series will increase, and the electrostatic voltage will increase accordingly. When the static voltage exceeds the battery (cells) ) withstand voltage value, it will cause a short circuit between the battery (cell) electrode and the shell and damage the battery, and it may also cause electromagnetic interference to the battery system

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