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Pre-charging control system for lithium battery assembly of industrial vehicle

A technology for industrial vehicles and control systems, applied in the field of lithium battery assembly pre-charge control systems for industrial vehicles, can solve problems such as damage to circuit components and failure of drive motor controllers to avoid energy shocks and ensure power supply security. Effect

Pending Publication Date: 2021-08-10
HANGCHA GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the start-up and power supply process of the power supply to the drive motor controller, there is often a large instantaneous current at the moment when the circuit between the power supply and the drive motor controller is connected, and the excessive instantaneous current tends to cause irreversible damage to the circuit devices. damage, resulting in the drive motor controller not working properly

Method used

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  • Pre-charging control system for lithium battery assembly of industrial vehicle

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Embodiment Construction

[0022] The drive motor controller in equipment such as industrial vehicles generally uses a key switch to control whether the drive motor controller and the power supply are directly connected or not.

[0023] Considering that the moment the contactor connected between the drive motor controller and the power supply is turned on from disconnection, a large instantaneous current will be generated, which can be as high as 2000A, which is easy to damage the contactor or even impact the drive motor controller internal circuit devices. Therefore, the corresponding pre-charging circuit can be configured for the contactor. After the key switch is inserted, the pre-charging circuit first charges the two ends of the contactor. The contactor can only be closed when the voltage difference between the two ends is small, so as to avoid driving The moment when the controller and the power supply are connected, the circuit device will be damaged due to excessive current.

[0024] However, t...

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Abstract

The invention discloses a pre-charging control system for a lithium battery assembly of an industrial vehicle. The pre-charging control system comprises: a driving motor controller and a power supply assembly, a driving motor contactor and a first pre-charging circuit which are connected between the power supply output end of the power supply assembly and the power supply input end of the driving motor controller; and a first switch and a second switch which are synchronously opened and closed. When the first switch is closed, the power supply assembly outputs power supply voltage; the second switch is connected with the power supply output end of the power supply assembly and the power-on pin of the logic card. When the first pre-charging circuit charges the two contact ends of the driving motor contactor by using the power supply voltage until the voltage difference value is small, the driving motor contactor is closed; and when the logic card power-on pin is powered off, the driving motor contactor is disconnected. The effect of synchronously controlling whether the power supply voltage of the power supply assembly is output or not and whether the driving motor contactor is switched off or not is achieved through the two-way switch, and the power supply safety of the driving motor controller is guaranteed.

Description

technical field [0001] The invention relates to the technical field of circuit devices, in particular to a pre-charging control system for an industrial vehicle lithium battery assembly. Background technique [0002] In industrial vehicles or other similar industrial equipment, the drive motor is one of the key components for the normal operation of the equipment. The start and stop of the driving motor is controlled by the driving motor controller; the driving motor controller is powered by the power supply. Generally, the power supply is connected with a key switch; when the key switch is closed, the power supply supplies power to the drive motor controller, and the drive motor controller starts to work normally; when the key switch is disconnected, the power supply supplies power to the drive motor. interruption. [0003] During the start-up and power supply process of the power supply to the drive motor controller, there is often a large instantaneous current at the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00
CPCB60L3/0084
Inventor 徐征宇关文杰
Owner HANGCHA GRP
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