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Battery pack hot plug protection circuit and method

A protection circuit, hot-swap technology, applied in the field of electronics, can solve problems such as overvoltage, overcurrent, negative pressure, etc., achieve good switching speed and power consumption, reduce system costs, and facilitate component stocking.

Pending Publication Date: 2019-07-05
HANGZHOU BMSER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a battery pack hot-swappable protection circuit and protection method, which are used to solve the problems of overcurrent, overvoltage and negative pressure caused by the hot-swappable battery pack in the prior art

Method used

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  • Battery pack hot plug protection circuit and method
  • Battery pack hot plug protection circuit and method
  • Battery pack hot plug protection circuit and method

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Embodiment Construction

[0023] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made within the spirit and scope of the present invention.

[0024] In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

[0025] In the following paragraphs the invention is described more specifically by way of example with reference to the accompanying drawings. It should be noted that all the drawings are in simplified form and use inaccurate scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of t...

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Abstract

The invention provides a battery pack hot plug protection circuit and method. The battery pack comprises N series connected batteries, the positive pole of the kth battery is connected to the negativepole of the k+1th battery; the hot plug protection circuit comprises N branches, the kth branch corresponds to the positive pole of the kth battery, the Nth branch corresponds to the positive pole ofthe Nth battery, and each branch is connected in series with a switch tube; a first control signal controls the on and off of the respective switch tubes and changes in real time as each switch tubeis turned on and off, the difference between the first control signal and the voltage of the output end of each branch is divided to drive the on and off of the switch tubes on corresponding branches;the kth branch is preferentially turned on than the k+1th branch, and the kth branch is turned off slower than the k+1th branch, wherein k is greater than or equal to 1, and +1 is greater than k andless than or equal to N. The battery pack hot plug protection circuit and method completely suppress surge current and surge voltage and improve circuit performance.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a battery pack hot-swapping protection circuit and protection method. Background technique [0002] Due to the relatively low voltage and capacity of storage devices such as batteries and supercapacitors (for the convenience of explanation, batteries and battery packs are used below), it is difficult to use them directly in large systems. In practice, multiple batteries are often connected in series. Increase the voltage and connect multiple batteries in parallel to increase capacity. Due to the actual production process and the difference in the use environment, there are differences between each single battery. In order to safely and give full play to the performance of the battery pack, a battery management system must be equipped, and the battery management system and the battery pack are connected through a wire harness. In order to filter out the interference signal on...

Claims

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Application Information

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IPC IPC(8): H02H9/02H02H9/04
CPCH02H9/02H02H9/04
Inventor 奚淡基黎夏周逊伟
Owner HANGZHOU BMSER TECH
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