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Protection module with overcurrent quick response function

A protection module and fast-response technology, applied in battery overcurrent protection, emergency protection circuit devices for limiting overcurrent/overvoltage, safety/protection circuits, etc.

Inactive Publication Date: 2021-07-09
SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: Lithium battery safety standard UL2054 describes the LPS (Limited Power Source) standard. For the occasions where PTC overcurrent protection devices are used, the protection time required by LPS for PTC is 8A and less than 60s, while many mobile phone developers The development of fast charging technology above 6A has begun, but the existing PTC components cannot meet the requirements of LPS while charging and discharging at 6A

Method used

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  • Protection module with overcurrent quick response function
  • Protection module with overcurrent quick response function
  • Protection module with overcurrent quick response function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A protection module with fast response to overcurrent, such as figure 1 As shown, it includes overcurrent protection element 2, heating element 3 and substrate 1 from top to bottom, where:

[0070] The substrate 1 is a single-layer PCB, including first, second, and third pads 1a, 1b, and 1c on the substrate;

[0071]The overcurrent protection element 2 is a surface-mounted PTC element with a first electrode 2a and a second electrode 2b. The overcurrent protection element 2 is mounted on the surface of the substrate 1 by reflow soldering, and its first The electrode 2a is electrically connected to the first pad 1a on the substrate, and the second electrode 2b is electrically connected to the second pad 1b on the substrate;

[0072] The heating component 3 is composed of a section of copper-clad wire arranged on the PCB, and has a first electrode and a second electrode, which are respectively connected to the first pad 1a and the third pad 1c of the substrate 1 .

[007...

Embodiment 2

[0076] A protection module with fast response to overcurrent, such as figure 2 As shown, it includes an overcurrent protection element 14, an upper substrate 11a, a heating element 13 and a lower substrate 11b from top to bottom, wherein,

[0077] The upper and lower substrates 11a, 11b are printed circuit boards, and the upper surface of the upper substrate 11a is respectively provided with first, second, and third pads 12a, 12b, 12c of the upper substrate;

[0078] The heat-generating component is a heat-generating component 13 arranged on the lower substrate, consisting of a section of copper-clad wire, located on the upper surface of the lower substrate 11b, including the first and second electrodes 13a, 13b of the heating component, wherein the heating component 13 An electrode 13a is electrically connected to the first pad 12a of the upper substrate through the first PCB via hole 15a connected between the upper and lower substrates 11a and 11b, and the second electrode ...

Embodiment 3

[0082] A protection module with fast response to overcurrent, such as image 3 As shown, it includes upper substrate, overcurrent protection element, middle substrate, heating components and lower substrate from top to bottom, among which,

[0083] The upper, middle, and lower substrates are respectively composed of printed circuit boards to form the first, second, and third substrates 21a, 21b, and 21c, and there are three layers of substrates. The upper surface of the first substrate 21a is provided with the first substrate on the first substrate. , The second and third pads 22a, 22b, 22c are connected to the first pad 22a on the first substrate by the first PCB via hole 25a passing through the first, second and third substrates, The second PCB via hole 25b is connected to the second pad 22b on the first substrate;

[0084] The over-current protection element is an over-current protection element 24 arranged on the second substrate, which is an embedded PTC chip embedded on...

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Abstract

The invention discloses a protection module with an overcurrent quick response function. Theprotection module is connected with a protected circuit through bonding pads, is controlled by a control unit and comprises more than one layer of substrates, an overcurrent protection element and heating parts; the heating parts are arranged in at least partial areas of the substrates, and three bonding pads are arranged on the surface of at least one substrate; the overcurrent protection element comprises a first electrode and a second electrode which are electrically connected with the first bonding pad and the second bonding pad respectively. the heating part comprises a first electrode and a second electrode, wherein the first electrode is electrically connected with the first electrode of theovercurrent protection element and the first bonding pad, and the second electrode is electrically connected with the third bonding pad; and the third bonding pad is electrically connected with the control unit. When the current exceeds a certain threshold value, the control unit controls the heating part to be powered on and emit heat, so that the protection response time of the overcurrent protection element is shortened; when the current is below the threshold value, the overcurrent protection element does not generate false protection; and therefore, the over-current protection element can be quickly protected when the overcurrent protection element bears large current for charging and discharging.

Description

technical field [0001] The invention relates to a protection module with fast response to overcurrent. On the one hand, the overcurrent protection element can meet the charging and discharging service life of a large current, and on the other hand, it can meet the customer's requirements for fast response protection under current, and is no longer affected by The lithium battery safety standard UL2054 is about the constraints of the LPS standard. It complies with the current rapid development of 5G and users' dependence on fast charging. Background technique [0002] With the increasing popularity of smart phones and the rapid development of the 5G era, the charging and discharging current of mobile phones is getting larger and larger, and the actual carrying capacity of over-current protection components is becoming more and more demanding. Therefore, over-current protection components not only need to have over-current protection In addition to its functions, it also need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02H02J7/00
CPCH02H9/02H02J7/00304
Inventor 夏坤方勇范荣刘玉堂高道华吴国臣
Owner SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
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