Safety type battery box for electric automobile

Abstract

The invention discloses a safety type battery box for an electric automobile. The safety type battery box comprises a BMS (Battery Management System) voltage acquisition port, a BMS relay control port and multiple battery pack units, wherein the multiple battery pack units are respectively connected between the BMS voltage acquisition port and the BMS relay control port; each battery pack unit comprises a first relay, a second relay and a battery cell; the first relays and the second relays are connected in parallel; the battery cells are respectively connected with the first relays and the second relays. In such a way, according to the safety type battery box disclosed by the invention, the problem that a system cannot work because a certain battery in serial connection is in an open circuit is avoided, a situation that the electric automobile cannot drive because a certain battery cell is in the open circuit during running is solved, a motor of the electric automobile still can work normally for a certain time although the total voltage of the batteries is lack of the voltage of one battery, and an emergency braking situation cannot be caused, so that the life and the property of a driver are ensured.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a safe battery box for electric vehicles. Background technique [0002] In the electric vehicle industry, because there are many batteries connected in series and parallel in the battery box, and the number of batteries is too large, the existing battery instability factors will increase accordingly. Open circuit situation, at this time, the discharge circuit of the entire battery pack and the external system is open, and the electric vehicle will not be able to continue driving. Contents of the invention [0003] The technical problem mainly solved by the present invention is to provide a safe battery box for electric vehicles, which avoids the problem that the system cannot work due to the open circuit of a certain battery in the series connection, and solves the problem that the electric vehicle cannot continue driving due to an open circuit of a battery cell during driving....

AI Technical Summary

Problems solved by technology

[0003] The technical problem mainly solved by the present invention is to provide a safe battery box for electric vehicles, which avoids the problem that the system cannot work due to the open circuit of a certain battery in the series connection, and solves the problem that the electric vehicle cannot continue driving due to an open circuit of a battery cell during driving. If the situation occurs, although the total voltage of the battery will reduce the voltage of one battery at this time, the motor of the electric vehicle can still work normally for a certain period of time, and there will be no emergency braking, so that the life and property of the driver are protected.

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