Lithium battery system and aerial work vehicle

Abstract

The invention relates to the technical field of engineering machinery, and discloses a lithium battery system and an aerial work vehicle. Lithium battery system includes: battery and feedback current control device. The feedback current control device includes: a first current capture device, which includes: a first feedback current capture module, used to capture the feedback current; a first switch module, used to turn on or unidirectionally cut off the main circuit; and a control module, Used to: receive the first voltage at one end of the driver on the main circuit, the second voltage at one end of the battery and the temperature of the battery; and the difference between the first voltage and the second voltage When the voltage is greater than the preset voltage and the temperature of the battery is less than or equal to the preset temperature, the main circuit is unidirectionally cut off by controlling the first switch module, so that the first current capture circuit on the first The feedback current capture module captures the feedback current. The invention can greatly reduce the probability of lithium precipitation in the battery and the risk of thermal runaway of the battery.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a lithium battery system 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, for the op...

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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