Feedback current control device and overhead working truck

Abstract

The invention relates to the technical field of engineering machinery, and discloses a feedback current control device and an overhead working truck. The feedback current control device comprises a feedback current capturing module, a first switch module and a control module, wherein the feedback current capturing module is located on a current capturing circuit and is used for capturing a feedback current; the first switch module is used for conducting or switching off the current capturing circuit; and the control module comprises a first receiving unit and a first control unit, and the first receiving unit is used for receiving a first voltage at one end of a driver on a power supply circuit, a second voltage at one end of a battery and the temperature of the battery, the first controlunit is used for executing the following operation according to the difference value of the first voltage and the second voltage and the temperature of the battery, under the condition that the difference value of the first voltage and the second voltage is greater than a preset voltage and the temperature of the battery is less than or equal to a preset temperature, the current capturing circuitis conducted by controlling the first switch module, and the feedback current is captured by the feedback current capturing module. According to the feedback current control device and the overhead working truck, the probability of lithium precipitation of the battery and the risk of thermal runaway of the battery can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a feedback current control device and an aerial work vehicle. Background technique [0002] Since electric drive aerial work vehicles (self-propelled) usually do not have mechanical friction brakes, the deceleration and parking of the aerial work vehicles rely on energy feedback regenerative braking technology. However, the regenerative braking technology has the following two characteristics: 1. The travel motor driver is both an inverter and a rectifier. When the aerial work vehicle decelerates or goes downhill, it converts kinetic energy into electrical energy, and then feeds the converted electrical energy back to the power Battery; 2. The deceleration and braking time of aerial work vehicles is usually short, and the maximum speed is usually about 6KM / H, and the instantaneous pulse feedback current generated by braking is usually relatively large. Therefore, f...

AI Technical Summary

Problems solved by technology

However, the power of the heating device is limited by various factors, and the temperature rise rate is usually around 10°C / h

When the temperature is low, the time required for heating is longer, which affects the use of equipment by customers

In addition, since aerial work vehicles usually work intermittently, the shutdown interval is long, and the battery temperature is difficult to maintain (the battery temperature cannot be guaranteed to be kept above 0°C during discharge), so this method is not effective and the user experience is poor. Existing technologies have very limited effect on reducing the risks of pulse charging at low temperatures

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