CN206293881U - A kind of short-circuit protection circuit of battery bag blower fan - Google Patents
A kind of short-circuit protection circuit of battery bag blower fan Download PDFInfo
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- CN206293881U CN206293881U CN201621263919.0U CN201621263919U CN206293881U CN 206293881 U CN206293881 U CN 206293881U CN 201621263919 U CN201621263919 U CN 201621263919U CN 206293881 U CN206293881 U CN 206293881U
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- blower fan
- battery bag
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Abstract
The utility model is applied to field of circuit technology, there is provided a kind of short-circuit protection circuit of battery bag blower fan.Compared to prior art; when there is short circuit in the battery bag blower fan in the utility model; first metal-oxide-semiconductor is turned on; second metal-oxide-semiconductor is turned off; the path of external power supply and battery bag blower fan is cut off; the supply voltage of battery bag blower fan is reduced to zero, protect battery bag blower fan, so as to protect battery management system to gather balance module；After the short trouble of battery bag blower fan is excluded, the shut-off of the first metal-oxide-semiconductor, the conducting of the second metal-oxide-semiconductor, service restoration.The short-circuit protection circuit of battery bag blower fan of the present utility model is when short trouble occurs in battery bag blower fan; battery bag blower fan can be protected, so that protect battery management system to gather balance module, when short trouble is excluded; the power supply to battery bag blower fan can automatically be recovered, product viscosity is improve.
Description
Technical field
The utility model belongs to field of circuit technology, more particularly to a kind of short-circuit protection circuit of battery bag blower fan.
Background technology
The blower fan of battery bag is the equipment for reducing battery bag operating temperature in battery bag.In the prior art, battery
The short circuit that the blower fan of bag does not have protection device, blower fan in short circuit will cause battery management system collection balance module insurance to be burnt
It is disconnected, cause the whole battery bag cannot normal work.When processing after sale, battery management system collection balance module will be changed, reburned
It is disconnected to change again, cost is improve, the service efficiency of battery bag is reduced, consume the substantial amounts of time of personnel after sale.
Utility model content
The utility model embodiment provides a kind of short-circuit protection circuit of battery bag blower fan, it is intended to solve in the prior art
The blower fan of battery bag does not have the problem of protection device in short circuit.
The utility model embodiment provides a kind of short-circuit protection circuit of battery bag blower fan, it is characterised in that described short
Road protection circuit includes：
First metal-oxide-semiconductor, the second metal-oxide-semiconductor, the first electric capacity, the second electric capacity, first resistor, second resistance, 3rd resistor and
Four resistance；
The source electrode of first metal-oxide-semiconductor respectively with external power supply, the first end of first electric capacity, the 4th resistance
First end is electrically connected with, the first end electric connection at grid the second end, the second resistance respectively with first electric capacity, leakage
Pole first end respectively with the first resistor, the second end of second electric capacity, the grid of second metal-oxide-semiconductor electrically connect
Connect；
The source electrode of second metal-oxide-semiconductor first end, the second end electricity of the 4th resistance respectively with second electric capacity
Property connection, drain electrode the second end respectively with the second resistance, the first end of the 3rd resistor, battery bag blower fan electrically connect
Connect；
Second end of the first resistor, the second end of the 3rd resistor are grounded respectively.
Knowable to above-mentioned the utility model embodiment, compared to prior art, when the battery bag blower fan in the utility model
When there is short circuit, the path of external power supply and battery bag blower fan has been cut off in the first metal-oxide-semiconductor conducting, the second metal-oxide-semiconductor shut-off, makes electricity
The supply voltage of pond bag blower fan is reduced to zero, protects battery bag blower fan, so as to protect battery management system to gather balance module；When
After the short trouble of battery bag blower fan is excluded, the shut-off of the first metal-oxide-semiconductor, the conducting of the second metal-oxide-semiconductor, service restoration.It is of the present utility model
The short-circuit protection circuit of battery bag blower fan can protect battery bag blower fan when short trouble occurs in battery bag blower fan, so as to protect
Shield battery management system collection balance module, when short trouble is excluded, can automatically recover the power supply to battery bag blower fan, improve
Product viscosity.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those skilled in the art, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit diagram of the short-circuit protection circuit of the battery bag blower fan that the utility model first embodiment is provided；
Fig. 2 is the circuit diagram of the short-circuit protection circuit of the battery bag blower fan that the utility model second embodiment is provided.
Specific embodiment
To enable utility model purpose, feature, the advantage of the utility model embodiment more obvious and understandable, under
Face will combine the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment be carried out clear, complete
Ground description, it is clear that described embodiment is only a part of embodiment of the utility model, and not all embodiments.Based on this
Embodiment in utility model, the every other reality that those skilled in the art are obtained under the premise of creative work is not made
Example is applied, the scope of the utility model protection is belonged to.
Fig. 1 is referred to, Fig. 1 is the electricity of the short-circuit protection circuit of the battery bag blower fan that the utility model first embodiment is provided
Lu Tu, for convenience of description, illustrate only the part related to the utility model embodiment.The battery bag blower fan of Fig. 1 examples
Short-circuit protection circuit, mainly includes：
First metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the first electric capacity C1, the second electric capacity C2, first resistor R1, second resistance R2,
3rd resistor R3 and the 4th resistance R4, wherein the first metal-oxide-semiconductor Q1 be P-channel metal-oxide-semiconductor, the second metal-oxide-semiconductor Q2 be P-channel metal-oxide-semiconductor.
The source electrode of the first metal-oxide-semiconductor Q1 respectively with external power supply, the first end of the first electric capacity C1, the first end of the 4th resistance R4
It is electrically connected with, grid the second end respectively with the first electric capacity C1, the first end of second resistance R2 are electrically connected with, drain electrode is respectively with the
The first end of one resistance R1, second end of the second electric capacity C2, the grid of the second metal-oxide-semiconductor Q2 are electrically connected with.
The second end electric connection of the source electrode of the second metal-oxide-semiconductor Q2 first end, the 4th resistance R4 respectively with the second electric capacity C2,
Drain electrode the second end, the first end of 3rd resistor R3, the electric connection of battery bag blower fan respectively with second resistance R2.
Second end of first resistor R1, second end of 3rd resistor R3 are grounded respectively.
In the present embodiment, external power supply is powered by the short-circuit protection circuit of battery bag blower fan to battery bag blower fan, when
When the external power supply is opened, due to the effect of C1, the grid output high level of Q1, Q1 shut-offs, because the grid of Q2 connects C2's
Second pole and the earth, by C2 and the collective effect on ground, the grid output low level of Q2, Q2 conductings.External power supply is passed sequentially through
R4, Q2 power to battery bag blower fan.
When short trouble occurs in battery bag blower fan, under short-circuit protection circuit is rapid with the voltage of battery bag blower fan junction
Drop, Q1 grids output low level, Q1 conductings, the conducting of Q1 makes Q2 grids be changed into high level, Q2 shut-offs, so as to cut off external
Power supply and the path of battery bag blower fan, make the supply voltage of battery bag blower fan be reduced to zero, protect battery bag blower fan.
After the short trouble of battery bag blower fan is excluded, on the voltage of short-circuit protection circuit and battery bag blower fan junction
Rise, Q1 grids output high level, Q1 shut-offs, the shut-off of Q1 makes Q2 grids be changed into low level, Q2 conductings, thus external power supply with
Turned between battery bag blower fan, external power supply is again for battery bag blower fan is powered.
The short-circuit protection circuit of the battery bag blower fan that the utility model embodiment is provided, compared to prior art, when this reality
When there is short circuit with the battery bag blower fan in new, the first metal-oxide-semiconductor conducting, the second metal-oxide-semiconductor shut-off has cut off external power supply with electricity
The path of pond bag blower fan, makes the supply voltage of battery bag blower fan be reduced to zero, battery bag blower fan is protected, so as to protect battery management
System acquisition balance module；After the short trouble of battery bag blower fan is excluded, the first metal-oxide-semiconductor shut-off, the second metal-oxide-semiconductor conducting is supplied
Electricity recovers.The short-circuit protection circuit of battery bag blower fan of the present utility model when there is short trouble in battery bag blower fan, Neng Goubao
Shield battery bag blower fan, so as to protect battery management system to gather balance module, when short trouble is excluded, can recover to electricity automatically
The power supply of pond bag blower fan, improves product viscosity.
On the basis of first embodiment, the utility model second embodiment provides the short-circuit protection electricity of battery bag blower fan
Road, refers to Fig. 2, for convenience of description, illustrate only the part related to the utility model embodiment.The battery of Fig. 2 examples
The short-circuit protection circuit of bag blower fan, is the expansion of the short-circuit protection circuit of the battery bag blower fan provided first embodiment, is compared
In first embodiment, the short-circuit protection circuit also includes：
First inductance L1, the second inductance L2, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5 and the 6th electric capacity C6.
The source electrode of the first metal-oxide-semiconductor Q1 is electrically connected with by the first inductance L1 with external power supply, the first end of the 4th electric capacity C4
First end with the first inductance L1 is electrically connected with, the second end ground connection of the 4th electric capacity C4, the first end and first of the 6th electric capacity C6
Second end of inductance L1 is electrically connected with, the second end ground connection of the 6th electric capacity C6.
The drain electrode of the second metal-oxide-semiconductor Q2 is electrically connected with by the second inductance L2 with battery bag blower fan, and the first of the second inductance L2
End is electrically connected with the first end of the 5th electric capacity C5, and the second end and the first end of the 3rd electric capacity C3 of the second inductance L2 electrically connect
Connect, second end of the 5th electric capacity C5, second end of the 3rd electric capacity C3 are grounded respectively.
The LC filter circuits being made up of the first inductance L1, the 4th electric capacity C4 and the 6th electric capacity C6, and by the second inductance
The 2nd LC filter circuits of L2, the 3rd electric capacity C3 and the 5th electric capacity C5 compositions, the electromagnetic interference that battery bag blower fan can be produced
Effectively suppressed.
Compared to first embodiment, the first electric capacity C1 in the short-circuit protection circuit can be, but not limited to from electrode electricity
Hold, the second electric capacity C2 can be, but not limited to select electrode capacitance.Because the capacity of electrode capacitance is bigger, external electricity can selected
Range of choice is wider during source.
The short-circuit protection circuit of the battery bag blower fan that the utility model embodiment is provided, compared to prior art, when this reality
When there is short circuit with the battery bag blower fan in new, the first metal-oxide-semiconductor conducting, the second metal-oxide-semiconductor shut-off has cut off external power supply with electricity
The path of pond bag blower fan, makes the supply voltage of battery bag blower fan be reduced to zero, battery bag blower fan is protected, so as to protect battery management
System acquisition balance module；After the short trouble of battery bag blower fan is excluded, the first metal-oxide-semiconductor shut-off, the second metal-oxide-semiconductor conducting is supplied
Electricity recovers.The short-circuit protection circuit of battery bag blower fan of the present utility model when there is short trouble in battery bag blower fan, Neng Goubao
Shield battery bag blower fan, so as to protect battery management system to gather balance module, when short trouble is excluded, can recover to electricity automatically
The power supply of pond bag blower fan, improves product viscosity.
In the above-described embodiments, the description to each embodiment all emphasizes particularly on different fields, and does not have the portion described in detail in certain embodiment
Point, may refer to the associated description of other embodiments.
It is more than the description of the short-circuit protection circuit to battery bag blower fan provided by the utility model, for this area
Technical staff, according to the thought of the utility model embodiment, will change in specific embodiments and applications,
To sum up, this specification content should not be construed as to limitation of the present utility model.
Claims (6)
1. a kind of short-circuit protection circuit of battery bag blower fan, it is characterised in that the short-circuit protection circuit includes：
First metal-oxide-semiconductor, the second metal-oxide-semiconductor, the first electric capacity, the second electric capacity, first resistor, second resistance, 3rd resistor and the 4th electricity
Resistance；
The source electrode of first metal-oxide-semiconductor respectively with external power supply, the first end of first electric capacity, the 4th resistance first
End is electrically connected with, the first end electric connection at grid the second end, the second resistance respectively with first electric capacity, drain electrode point
The grid of first end, the second end of second electric capacity, second metal-oxide-semiconductor not with the first resistor is electrically connected with；
The source electrode of second metal-oxide-semiconductor first end respectively with second electric capacity, the second end of the 4th resistance electrically connect
Connect, drain electrode the second end, the first end of the 3rd resistor, the electric connection of battery bag blower fan respectively with the second resistance；
Second end of the first resistor, the second end of the 3rd resistor are grounded respectively.
2. short-circuit protection circuit as claimed in claim 1, it is characterised in that the short-circuit protection circuit also includes：
First inductance；
The source electrode of first metal-oxide-semiconductor is electrically connected with the external power supply, specially：
The source electrode of first metal-oxide-semiconductor is electrically connected with by first inductance with the external power supply.
3. short-circuit protection circuit as claimed in claim 2, it is characterised in that the short-circuit protection circuit also includes：
4th electric capacity and the 6th electric capacity；
The first end of the 4th electric capacity is electrically connected with the first end of first inductance, the second termination of the 4th electric capacity
Ground；The first end of the 6th electric capacity is electrically connected with the second end of first inductance, the second termination of the 6th electric capacity
Ground.
4. short-circuit protection circuit as claimed in claim 1, it is characterised in that the short-circuit protection circuit also includes：
Second inductance；
The drain electrode of second metal-oxide-semiconductor is electrically connected with the battery bag blower fan, specially：
The drain electrode of second metal-oxide-semiconductor is electrically connected with by second inductance with the battery bag blower fan.
5. short-circuit protection circuit as claimed in claim 4, it is characterised in that the short-circuit protection circuit also includes：
3rd electric capacity and the 5th electric capacity；
The first end of the first end of second inductance and the 5th electric capacity is electrically connected with, the second end of second inductance with
The first end of the 3rd electric capacity is electrically connected with, and the second end of the 5th electric capacity, the second end of the 3rd electric capacity connect respectively
Ground.
6. the short-circuit protection circuit as described in any one of claim 1 to 5, it is characterised in that first electric capacity is electrode electricity
Hold and/or second electric capacity is electrode capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621263919.0U CN206293881U (en) | 2016-11-22 | 2016-11-22 | A kind of short-circuit protection circuit of battery bag blower fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621263919.0U CN206293881U (en) | 2016-11-22 | 2016-11-22 | A kind of short-circuit protection circuit of battery bag blower fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206293881U true CN206293881U (en) | 2017-06-30 |
Family
ID=59100339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621263919.0U Active CN206293881U (en) | 2016-11-22 | 2016-11-22 | A kind of short-circuit protection circuit of battery bag blower fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206293881U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110764006A (en) * | 2019-12-30 | 2020-02-07 | 杭州华塑加达网络科技有限公司 | Battery management system |
-
2016
- 2016-11-22 CN CN201621263919.0U patent/CN206293881U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110764006A (en) * | 2019-12-30 | 2020-02-07 | 杭州华塑加达网络科技有限公司 | Battery management system |
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| GR01 | Patent grant | ||
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Effective date of registration: 20180428 Granted publication date: 20170630 |
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| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20210428 Granted publication date: 20170630 |
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| PD01 | Discharge of preservation of patent | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20210428 Granted publication date: 20170630 |
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