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Battery pack relay protection circuit and protection method

A battery pack relay and protection circuit technology, applied in relays, circuits, electrical components, etc., can solve problems such as relay sintering and high safety hazards

Pending Publication Date: 2020-12-15
NEUSOFT REACH AUTOMOBILE TECH (SHENYANG) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the power supply of the battery pack relay is usually provided by the vehicle controller, when the external controller is abnormal or the line is virtual, the power supply changes instantaneously, the main positive relay and the main negative relay have the risk of being closed at the same time without being pre-charged. A large current flows through the high-voltage circuit instantaneously, which will cause the relay to be sintered and cannot be disconnected, which poses a high safety hazard

Method used

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  • Battery pack relay protection circuit and protection method
  • Battery pack relay protection circuit and protection method
  • Battery pack relay protection circuit and protection method

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Embodiment Construction

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0031] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

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Abstract

The invention provides a battery pack relay protection circuit and protection method, and relates to the technical field of battery pack power supply, the circuit comprises a relay control unit, a main positive relay, a power supply chip and a hardware protection unit; the relay control unit is connected with the main positive relay and is used for sending a first control signal to the main positive relay and detecting first abnormal state information of the main positive relay; the relay control unit is also connected with the power supply chip and is used for sending first abnormal state information to the power supply chip; the hardware protection unit is used for sending a delay signal to the power supply chip; the power supply chip is used for receiving an external signal and sendinga first power supply signal to the main positive relay based on the delay signal and the first abnormal state information. The circuit can control the closing time of the main positive relay, reducesthe risk that the main positive relay and the main negative relay are closed at the same time, solves a problem that a battery pack relay in the prior art is liable to be sintered, and achieves an effect of reducing the potential safety hazards.

Description

technical field [0001] The invention relates to the technical field of battery pack power supply, in particular to a battery pack relay protection circuit and protection method. Background technique [0002] The battery management system (Battery Management System, BMS) is the controller of the battery pack relay. Due to functional safety requirements, the power supply of the battery pack relay is usually provided by other controllers (such as the vehicle controller VehicleControl Unit, VCU). The relays in the battery pack generally include a main positive relay, a main negative relay and a pre-charge relay. [0003] Under normal circumstances, when the BMS controls the high-voltage power-on, the main negative relay and the pre-charging relay will be turned on in turn. After the pre-charging capacitor voltage is close to the power battery voltage, the main positive relay will be turned on in turn, and the pre-charging relay will be turned off. However, because the power sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H47/00H01H47/18
CPCH01H47/001H01H47/18
Inventor 陈明亮刘博
Owner NEUSOFT REACH AUTOMOBILE TECH (SHENYANG) CO LTD
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