Safety charging equipment for electric bicycle

Abstract

The invention discloses an electric bicycle safety charging device which comprises a controller, a charger and a temperature sensor, the charger and the temperature sensor are in communication connection with the controller, and the controller is in communication connection with a lithium battery of an electric bicycle so as to monitor the charging state of each battery cell in the lithium battery in real time. The charger is controlled to start or stop charging the lithium battery according to the monitoring result; the charger is in communication connection with the lithium battery, monitors the overall charging state of the lithium battery in real time, and limits the charging current and the charging voltage of the lithium battery according to a monitoring result; the temperature sensor is attached to the lithium battery and used for monitoring the battery temperature of the lithium battery in real time and feeding back the battery temperature to the controller, and the controller controls the charger to stop charging the lithium battery when judging that the temperature of the lithium battery is abnormal. Starting and stopping of the charger are controlled by monitoring the charging states of the whole lithium battery and the single battery cells, charging of the battery is stopped when the temperature of the battery is abnormal, and triple protection is provided for charging safety of the battery.

Description

technical field [0001] The invention relates to the technical field of electric bicycle charging safety, in particular to an electric bicycle safe charging device. Background technique [0002] At present, the electric bicycle chargers on the market have single functions. Some old-fashioned electric vehicle chargers provide constant voltage and constant current charging. After fully charged, the charger will continue to maintain a large current output, causing the battery of the electric vehicle to overcharge, resulting in abnormal battery temperature. , not only affects the service life of the battery, but also easily causes safety accidents such as battery explosion and spontaneous combustion of electric vehicles. In recent years, three-stage electric vehicle chargers have been widely used. Three-stage charging means that there are three stages of charging process from the beginning of charging to the end of charging. The first stage is constant current charging, the secon...

AI Technical Summary

Problems solved by technology

[0003] However, because the performance of different brands and types of electric vehicle batteries is usually different, various charging failures may still occur during the charging process. For example, lithium batteries are prone to charging failures due to overcharging of single cells. When a charging fault occurs, because the charger itself cannot communicate with the battery, it cannot obtain the charging status of the battery in time, and it does not have the function of identifying charging faults. Battery charging, resulting in continuous charging of the battery in a faulty state, which will affect the life of the battery in the slightest, and cause safety accidents such as spontaneous combustion of electric vehicles

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