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Backflow-prevention short-circuit protection system and method

A short-circuit protection and anti-backfeed technology, which is applied to emergency protection circuit devices, emergency protection devices with automatic disconnection, circuit devices, etc., and can solve problems such as current backfeed

Pending Publication Date: 2022-04-29
东风汽车有限公司东风日产乘用车公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to provide an anti-backfeed short-circuit protection system and method, aiming to solve the technical problem of current backfeed due to output short circuit or undervoltage in the prior art

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  • Backflow-prevention short-circuit protection system and method
  • Backflow-prevention short-circuit protection system and method
  • Backflow-prevention short-circuit protection system and method

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Embodiment Construction

[0056] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0058] refer to figure 1 , figure 1 It is a structural schematic diagram of the first embodiment of the anti-backfeed short-circuit protection system of the present invention.

[0059] In this embodiment, the anti-backfeed short circuit protection system includes: a first voltage detection circuit 10, a second voltage detection circuit 20, and a control circuit 30;

[0060] Wherein, the first voltage detection circuit 10 is connected to the voltage output circuit and the control circuit 30, the second voltage detection circuit 20 is connected to the load circuit and the control circuit 30 respectively, and the contr...

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Abstract

The invention discloses an anti-backflow short-circuit protection system and method. The anti-backflow short-circuit protection system detects first voltage output by a voltage output circuit through a first voltage detection circuit and outputs the first voltage to a control circuit; the second voltage detection circuit detects a second voltage of the input end of the load circuit and outputs the second voltage to the control circuit; the control circuit judges whether current backflow occurs or not according to the first voltage and the second voltage; and when the current flows backwards, a cut-off output signal is output to the voltage output circuit to control the voltage output circuit to stop outputting. The first voltage output by the voltage output circuit and the second voltage input into the load circuit are detected, whether current backflow occurs is judged according to the first voltage and the second voltage, and when current backflow occurs, the voltage output circuit is controlled to stop outputting. And the voltage output loop stops working to protect the voltage output circuit and the load circuit.

Description

technical field [0001] The invention relates to the technical field of circuit protection, in particular to an anti-backfeed short-circuit protection system and method. Background technique [0002] In new energy vehicles, it is necessary to convert high-voltage electricity into low-voltage electricity. DCDC power converters are usually used as voltage conversion components. The converted low-voltage electricity can supply power for low-voltage batteries and vehicle low-voltage loads. It is a very important power device. [0003] At present, the circuits used in many DCDC power converters have the risk of short circuit or undervoltage during use. When the DCDC power converter has an output short circuit or undervoltage, it will cause the current in the low-voltage battery at the load end to flow back into the DCDC power converter. , not only cause damage to the DCDC power converter, but also cause damage to the low-voltage battery. In severe cases, thermal runaway events wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/12H02H3/00H02H3/18
CPCH02H7/1213H02H3/003H02H3/18
Inventor 杨文东廖宏伟兰金鑫赵思迪黄照昆
Owner 东风汽车有限公司东风日产乘用车公司
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