Temperature protection control circuit for discharge cables in electric forklifts

CN224427120UActive Publication Date: 2026-06-30ANHUI HELI CO LTD
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Patent Information

Application Number
CN202521273090.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-06-20
Publication Date
2026-06-30
Estimated Expiration
2035-06-20

AI Technical Summary

Technical Problem

When electric forklifts are fully loaded, the temperature of the discharge cable rises, which can easily lead to wire fatigue and melting, especially in the high temperatures of summer, posing a fire risk. Current technology lacks effective temperature detection and protection measures.

Method used

Thermistors are installed at the positive and negative terminals of the discharge cable. The temperature signal is converted into an electrical signal by a temperature controller, which controls the relay to switch the vehicle controller to slow speed limit or braking mode. An alarm unit is also provided to remind the operator, thus achieving temperature protection for the discharge cable.

Benefits of technology

It effectively extends the service life of the discharge circuit, reduces the risk of fire, improves driving safety, and reduces the possibility of property damage and personal injury.

✦ Generated by Eureka AI based on patent content.

Smart Images

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    Figure CN224427120U_ABST
Patent Text Reader

Abstract

This utility model discloses a temperature protection control circuit for a discharge cable in an electric forklift. The positive terminal of the battery is connected to the VCC port of the temperature controller, the key port of the vehicle controller, and the VCC port of the vehicle controller via a key switch. The signal input terminal of the temperature controller is connected to the signal output terminal of the temperature sensing unit. A coil of a first relay is connected to a first signal output port of the temperature controller. The two ends of the switch of the first relay are connected to the key port and the brake port PE0 of the vehicle controller, respectively. A coil of a second relay is connected to a second signal output port of the temperature controller. The two ends of the switch of the second relay are connected to the key port and the speed limiting port PE1 of the vehicle controller, respectively. The signal output terminal of the vehicle controller is connected to the signal input terminal of the motor. This utility model protects the discharge cable from overheating by downshifting and speed limiting of the vehicle and by stopping the vehicle, ultimately extending the service life of the discharge circuit.
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