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Charger capable of preventing current from flowing backwards

A charger and anti-backflow technology, which is applied in the direction of current collectors, battery disconnect circuits, battery circuit devices, etc., can solve problems such as affecting life and damage to lithium batteries

Active Publication Date: 2022-05-20
上海迈相电源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the lithium battery is charging, if the charger is short-circuited, the charger will be disconnected from the lithium battery after a delay of ms from when the MCU detects the fault state to when the switch is turned off, so that the lithium battery is also in the ms state. Level short-circuit state, at this time, the lithium battery has a very large current flowing back into the charger, causing damage to the lithium battery, thereby affecting its life

Method used

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  • Charger capable of preventing current from flowing backwards
  • Charger capable of preventing current from flowing backwards
  • Charger capable of preventing current from flowing backwards

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Embodiment Construction

[0024] In order to make the purpose and technical solutions of the embodiments of the present invention more clear, the following will clearly and completely describe the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] The terms "first", "second", "third", "fourth", etc. (if any) in the present invention are used to distinguish between similar elements and do not necessarily describe a specific order or sequence sequence of time. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the subje...

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Abstract

The invention provides an anti-backflow current charger, which comprises an electric energy conversion circuit and a protection circuit, the protection circuit comprises a first switch, a second switch and a comparator, the first switch is connected in series with the output end of the electric energy conversion circuit, the input end of the comparator detects the current flowing through the first switch, and the output end of the comparator detects the current flowing through the second switch. The output end of the comparator is connected with the control end of the second switch, and when the current direction is reversed, the comparator controls the second switch to be switched on, the second switch enables the gate-source electrode of the first switch to be in short circuit, and the first switch is switched off. The anti-backflow current switching circuit provided by the invention can quickly respond, quickly turn off the switch at the output end of the charger, cut off the path of the backflow current flowing to the charger, and limit the magnitude of the backflow current within an acceptable range.

Description

technical field [0001] The invention relates to the technical field of battery charging, in particular to a charger for preventing backflow current. Background technique [0002] In the lithium battery charger, in order to ensure reliable charging and protect the lithium battery, a switch is usually added to the output of the charger for protection, and the control of the switch is usually realized by the MCU. After the MCU detects a fault state, it will go to the Turn off the switch. However, when the lithium battery is charging, if the charger is short-circuited, the charger will be disconnected from the lithium battery after a delay of ms from when the MCU detects the fault state to when the switch is turned off, so that the lithium battery is also in the ms state. At this time, the lithium battery has a very large current flowing back into the charger, causing damage to the lithium battery and affecting its life. Contents of the invention [0003] The invention provi...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02H3/18H02H3/087H02H7/18
CPCH02J7/0031H02J7/00304H02H3/18H02H3/087H02H3/003H02H7/18Y02E60/10
Inventor 杨永兵
Owner 上海迈相电源技术有限公司
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