The invention relates to the field of anti-theft technology, in particular to a battery car anti-theft
alarm device and a method, wherein the method comprises a power supply is connected, a
relay works, and a normally closed contact is in an off state, when motor car signals are sent, a horn of a
car alarm sounds, a build-in horn of the
car alarm also can sound, and a
light emitting diode flashes to alarm. A charging plug is pulled up from an A position (such as a three-core
coaxial line), a charging loop is
cut off, break-over
voltage on the two ends of the
light emitting diode disappears, the
light emitting diode changes into a non-conducting state from a conducting state, work current loops on the two ends of a
relay coil are
cut off, the normally closed contact returns to a
closed state, and an audible and visual alarm works. The battery car anti-theft
alarm device uses wired protection, uses cables to transport signals, alarms through sound and light, double warms on vision and auditory, and is intuitive and clear. A 36V-48V
low voltage direct current power supply which is changed from a 220V
alternating current power supply leads to the front of an electric car, thereby eliminating hidden trouble of leakage. The battery car anti-theft
alarm device and the method use special
circuit design, thereby leading motor cars to obtain multi-
azimuth protection.