CN107706970A - A kind of circuit of charger overvoltage protection - Google Patents
A kind of circuit of charger overvoltage protection Download PDFInfo
- Publication number
- CN107706970A CN107706970A CN201710900621.9A CN201710900621A CN107706970A CN 107706970 A CN107706970 A CN 107706970A CN 201710900621 A CN201710900621 A CN 201710900621A CN 107706970 A CN107706970 A CN 107706970A
- Authority
- CN
- China
- Prior art keywords
- circuit
- input voltage
- charger
- relay
- overvoltage protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003750 conditioning effect Effects 0.000 claims abstract description 11
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- H02J7/0026—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention provides a kind of circuit of charger overvoltage protection, and the circuit includes：Main relay, its coiler part couple with input voltage, and contact part couples with output end；Preliminary filling relay, it is normally-closed contact that it, which gets an electric shock, and its coiler part couples with input voltage, and it, which gets an electric shock, is coupled to the subsequent conditioning circuit of charger.After input voltage excessively inputs protection setting electrical voltage point, relay completely disconnects input voltage so as to be really achieved the purpose of input voltage protection with circuit below.
Description
Technical field
The present invention relates to a kind of circuit of charger overvoltage protection.
Background technology
Because input voltage shakiness causes overtension or client to misplug (such as in terms of the situation of my houses market feedback
220VAC chargers are inserted on 380VAC power supplys) and the machine ratio of damage is very high.
Overvoltage protection is all closing machine to electric automobile battery charger typically in input 265VAC or so in the market
Output voltage, allow machine shutdown.As shown in Figure 1：And after input overvoltage protection, because input relay J1 is in parallel pre-
Charging resistor R2 presence, so while machine upkeep shuts down, but due to the presence circuit of main relay preliminary filling resistance in parallel
Below or can be by too high voltages, still can will many main devices such as circuit element such as power tube, input filter capacitor below
Part damages and causes machine not work.It is also that comparison is more commercially to damage the machine reprocessed because input voltage is too high, in order to
Further product reliability is improved, it is necessary to design the charger that a completion enough reaches input overvoltage protection.
The content of the invention
In view of the shortcomings of the prior art, it is a primary object of the present invention to propose a kind of circuit of charger overvoltage protection.
It is mainly characterized in that relay completely breaks input voltage and circuit below after input voltage excessively inputs protection setting electrical voltage point
Open so as to be really achieved the purpose of input voltage protection.
According to above-mentioned purpose, the present invention provides a kind of circuit of charger overvoltage protection, and the circuit includes：Main relay
Device, its coiler part couple with input voltage, and contact part couples with output end；Preliminary filling relay, its electric shock is normally-closed contact,
Its coiler part couples with input voltage, and it, which gets an electric shock, is coupled to the subsequent conditioning circuit of charger.
In one embodiment, the subsequent conditioning circuit includes pre-charge resistance.
In one embodiment, the subsequent conditioning circuit also includes：With the charging capacitor of pre-charge resistance coupling.
In one embodiment, the coiler part of the main relay is coupled by triode and input voltage.
In one embodiment, the circuit also includes：With the operational amplifier of preliminary filling relay coil part coupling.
A kind of circuit of charger overvoltage protection provided by the invention, preliminary filling is added using the charger of modular structure technique
Electrical relay J1, this relay use normally-closed contact, and when inputting over-pressed, relay disconnects, while main relay J2 also disconnects this
When input voltage will not be added to relay subsequent conditioning circuit, so being added to 380VAC even if specified input 220V will not also cause to charge
The damage of machine, so as to truly prevent circuit due to overvoltage and damage.
Brief description of the drawings
Fig. 1 shows a kind of circuit diagram of the circuit one side of electric automobile battery charger overvoltage protection in the market.
Fig. 2 shows a kind of circuit diagram of the circuit one side of charger overvoltage protection of the present invention.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the present invention, below in conjunction with of the invention real
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described implementation
Example is only part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area
The every other embodiment that art personnel are obtained under the premise of creative work is not made, it should all belong to what the present invention protected
Scope.
Fig. 1 is refer to, Fig. 1 shows that the present invention provides a kind of circuit of charger overvoltage protection, and the circuit includes：It is main
Relay, its coiler part couple with input voltage, and contact part couples with output end；Preliminary filling relay, it gets an electric shock to be normally closed
Contact, its coiler part couple with input voltage, and it, which gets an electric shock, is coupled to the subsequent conditioning circuit of charger.
In one embodiment, the subsequent conditioning circuit includes pre-charge resistance.
In one embodiment, the subsequent conditioning circuit also includes：With the charging capacitor of pre-charge resistance coupling.
In one embodiment, the coiler part of the main relay is coupled by triode and input voltage.
In one embodiment, the circuit also includes：With the operational amplifier of preliminary filling relay coil part coupling.
When charging normal, when being pre-charged electric on just, normally closed relay is connected pre-charge resistance R32R33 and filled to main capacitance C1
Electricity, now complete machine power supply, which starts, powers by the offer of the pin normally-closed contact of main relay 2,4, is powered after power activation by DC+.
1 pin after excessively 3 pin is filled after the U5A 2 pin electric capacity electricity 4 seconds or so and goes out low level, Q3 current collections extremely high level, now main relay
Device J2 adhesives charger, which enters, to be charged normal.
When input voltage overvoltage, amplifier U4 1 pin is low level, and U5 2 pin are dragged down into rear Q3 colelctor electrodes level by X2
Drag down, main relay disconnects.Q3 colelctor electrode level, which is dragged down Q4 base stages by X1 after dragging down, simultaneously causes pre-charge-relay same
When disconnect.Now main relay contacts reset 2,4 pin conducting complete machine power supply and continue to start the upper process of repetition.
In addition, although the present specification is described in terms of embodiments, not each embodiment is only only comprising one
Vertical technical scheme, this narrating mode of specification only for clarity, those skilled in the art should using specification as
One entirety, the technical solutions in the various embodiments may also be suitably combined, formed it will be appreciated by those skilled in the art that its
His embodiment.
Claims (5)
1. a kind of circuit of charger overvoltage protection, it is characterised in that the circuit includes：
Main relay, its coiler part couple with input voltage, and contact part couples with output end；
Preliminary filling relay, it is normally-closed contact that it, which gets an electric shock, and its coiler part couples with input voltage, and its electric shock is coupled to charger
Subsequent conditioning circuit.
2. circuit as claimed in claim 1, it is characterised in that the subsequent conditioning circuit includes pre-charge resistance.
3. circuit as claimed in claim 2, it is characterised in that the subsequent conditioning circuit also includes：With the pre-charge resistance coupling
The charging capacitor connect.
4. circuit as claimed in claim 1, it is characterised in that the coiler part of the main relay passes through triode and input
Voltage couples.
5. circuit as claimed in claim 1, it is characterised in that the circuit also includes：
With the operational amplifier of preliminary filling relay coil part coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710900621.9A CN107706970A (en) | 2017-09-28 | 2017-09-28 | A kind of circuit of charger overvoltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710900621.9A CN107706970A (en) | 2017-09-28 | 2017-09-28 | A kind of circuit of charger overvoltage protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107706970A true CN107706970A (en) | 2018-02-16 |
Family
ID=61175283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710900621.9A Pending CN107706970A (en) | 2017-09-28 | 2017-09-28 | A kind of circuit of charger overvoltage protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107706970A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553551A (en) * | 2003-06-06 | 2004-12-08 | 中兴通讯股份有限公司 | AC inputting high-voltage protector |
| CN103390879A (en) * | 2012-05-10 | 2013-11-13 | 中兴通讯股份有限公司 | Alternating current power supply input high voltage protection device |
| CN103795050A (en) * | 2012-10-31 | 2014-05-14 | 中兴通讯股份有限公司 | High-voltage protection circuit, high-voltage protection method and power supply |
| CN204615371U (en) * | 2015-04-07 | 2015-09-02 | 深圳市今朝时代新能源技术有限公司 | A kind of interchange inputs high voltage protection circuit |
-
2017
- 2017-09-28 CN CN201710900621.9A patent/CN107706970A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553551A (en) * | 2003-06-06 | 2004-12-08 | 中兴通讯股份有限公司 | AC inputting high-voltage protector |
| CN103390879A (en) * | 2012-05-10 | 2013-11-13 | 中兴通讯股份有限公司 | Alternating current power supply input high voltage protection device |
| CN103795050A (en) * | 2012-10-31 | 2014-05-14 | 中兴通讯股份有限公司 | High-voltage protection circuit, high-voltage protection method and power supply |
| CN204615371U (en) * | 2015-04-07 | 2015-09-02 | 深圳市今朝时代新能源技术有限公司 | A kind of interchange inputs high voltage protection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180216 |