Balancing control circuit of new energy electric vehicle

Abstract

The invention discloses a balancing control circuit of a new energy electric vehicle, comprising a storage battery, a singlechip, a voltage acquisition circuit, a current acquisition circuit and a temperature acquisition circuit, wherein the output end of the battery is electrically connected with the singlechip through an input end of the voltage acquisition circuit, an input end of the current acquisition circuit and an input end of the temperature acquisition circuit respectively. The balancing control circuit of a new energy electric vehicle can detect the charging voltage and the chargingcurrent of the storage battery, sends the voltage signals and current signals collected by the voltage acquisition circuit and the current acquisition circuit to the singlechip for processing, and can preferably control the charging voltage value and the charging current value of each battery module when the battery module is charged, by means of the equalizing circuit, so as to enable each battery module to be placed in a balanced charging environment, thereby prolonging the service life of the battery modules and reducing the cost of use.

Description

Technical field [0001] The invention belongs to the technical field of battery management circuits, and specifically relates to a new energy electric vehicle balance control circuit. Background technique [0002] At present, electric vehicle technology and hybrid vehicle technology are developing rapidly. The power source uses multiple battery modules connected in series to supply power to the vehicle. As a result, there are a large number of batteries, so the status and performance of their batteries are monitored. It is also more complicated. [0003] In the process of charging and discharging the battery, due to the changes in the physical characteristics of the battery, such as the excitation voltage and the change in the internal resistance of the battery, the consistency of each battery module is reduced, which will cause the deterioration or even damage of the battery pack performance, which greatly reduces the battery pack The service life of the battery module is within t...

AI Technical Summary

Problems solved by technology

[0002] At present, electric vehicle technology and hybrid electric vehicle technology are developing rapidly. The power source uses multiple battery modules connected in series to supply power for the vehicle. Therefore, there are a large number of batteries, so the monitoring of the state and performance of the batteries also more complicated

[0003] During the charging and discharging process of the battery, due to the change of the physical characteristics of the battery, such as the change of the activation voltage and the internal resistance of the battery, the consistency of each battery module is reduced, which will cause the performance of the battery pack to deteriorate or even be damaged, which greatly reduces the battery life. In the production of battery modules, due to the controllable difference range and the unequal voltage of each module, it brings many problems to the control of the battery system in the later period, and it is under unequal voltage conditions for a long time In this situation, the energy usage rate of the battery system in the later stage will drop sharply, and eventually the cruising range of the electric vehicle will drop sharply. In view of this situation, it is very necessary to develop a battery balancing system

Images