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Dual-protection control circuit

A technology of control circuit and double protection, applied in emergency protection circuit devices, circuit devices, battery circuit devices, etc., can solve the problem of not being able to stimulate the secondary protection circuit for testing, to prevent production defects, improve the integrity of testing functions, and improve The effect of product safety

Inactive Publication Date: 2019-03-19
SUNWODA ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention proposes a double protection control circuit, aiming to solve the problem that only one protection circuit can be tested during the production and testing process of finished batteries, and the secondary protection circuit cannot be stimulated and tested

Method used

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Embodiment Construction

[0017] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0019] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but doe...

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Abstract

The invention discloses a dual-protection control circuit applied to a battery. The dual-protection control circuit comprises a battery positive connection end, a battery negative connection end, a first protection circuit and a second protection circuit. The first protection circuit and the second protection circuit are connected in parallel between the battery positive connection end and the battery negative connection end. The first protection circuit includes a first protection chip and a first control MOS tube group; and the first protection chip is configured to monitor a working value of the battery and is connected with the first control MOS tube group electrically. The second protection circuit includes a second protection chip and a second control MOS tube group; the second protection chip for monitoring the working value of the battery is connected with the second control MOS tube group electrically. According to the application, the primary protection and the secondary protection of the battery are controlled to work separately; and the integrity of the test function is comprehensively improved. When comprehensive testing and interception are carried out on a battery production test tend, a problem of the production failure of the second protection circuit is solved and the product safety is improved.

Description

technical field [0001] The invention relates to the field of mobile phone battery application design protection, in particular to a double protection control circuit. Background technique [0002] At present, fast charging technology for flagship mobile phones is standard, and the fast charging power of mobile phones reaches 20W. At the balance point of meeting the high-current fast charging technology and safety certification at the same time, the PARK protection circuit of the battery uses a double IC protection circuit on a large scale (because the double protection circuit uses MOS as a switching device, the total circuit internal resistance is small, and it can safely pass through large Current, the secondary protection uses IC to control, the protection function is comprehensive, and meets various safety certification requirements, the protection function is more complicated), but the protection parameter of the secondary protection IC is slightly higher than that of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/18H01M10/42
CPCH01M10/4257H02H7/18Y02E60/10
Inventor 贺明王民左其国刘辉虎
Owner SUNWODA ELECTRONICS
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