CN209088561U - A kind of charger output reverse-connection preventing circuit - Google Patents
A kind of charger output reverse-connection preventing circuit Download PDFInfo
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- CN209088561U CN209088561U CN201821641319.2U CN201821641319U CN209088561U CN 209088561 U CN209088561 U CN 209088561U CN 201821641319 U CN201821641319 U CN 201821641319U CN 209088561 U CN209088561 U CN 209088561U
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- output
- charger
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- reverse
- circuit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of charger output reverse-connection preventing circuit, it includes charger output module and battery pack, and battery pack both ends are provided with output plus terminal and output negative terminal；Charger output reverse-connection preventing circuit module is provided between charger output module and output plus terminal and output negative terminal；There is LED lamp alarm function when not generating heat while the utility model may be implemented anti-reverse and do not influence the delivery efficiency that charges, and being reversely connected；Finally charger can also be cut off in time to connect with battery, not damage any other component of charger major loop, avoid burning out battery pack when reversal connection.
Description
Technical field
The utility model belongs to protection circuit device technical field, and specially a kind of charger exports reverse-connection preventing circuit.
Background technique
Currently, the occupation rate in new energy electric motor vehicle market be it is increasing, battery charging safety also increasingly causes to consume
When the phenomenon that person payes attention to, most serious is that the polarity battery polar connected to it of charger output is opposite, charger is gently then damaged
Or battery, the heavy then serious safeties accident such as cause fire；
Existing charger reverse-connection preventing circuit is roughly divided into two kinds: one is charger output port install additional fuse,
When charger output polarity with battery polar phase simultaneously as electric current in the normal range fuse do not generate heat nor affect on it is normal
Charging output；When charger output polarity is opposite with battery polar, charging is cut off due to the excessive fuse wire of electric current
The connection of device and battery is to have the function that protection；This charger reverse-connection preventing circuit does not influence to charge when battery polar is correct
And only reverse-connection preventing circuit only needs a fuse, the cost of component is not high, but every primary by reversal connection, and fuse will fuse one
It is secondary, it needs to dismantle charger case and repairs, later period maintenance is at high cost；And the big current loop of fuse wire is charger
Main output loop, other components on main output loop, which are also possible to damage because of high current, (gently then damages component
Energy or service life), fail to play the role of protecting charger itself.
Second is installation device for power switching (such as high-power MOS, silicon-controlled, IGBT) on charger output loop
With the driving circuit and battery polar detection circuit of device for power switching, when battery polar detection circuit detection battery polar just
When true, control driving circuit opens the normal connection that device for power switching realizes charger output loop and battery；Work as battery pole
Property detection circuit detect battery reversal connection when, control driving circuit close device for power switching come cut off charger output loop with
Battery connection, to reach anti-reverse protective effect；This charger reverse-connection preventing circuit can not damage charger when battery is reversely connected
Any component, can realize anti-battery reverse connecting protection well, but this protection circuit needs device for power switching and its drive
Dynamic circuit, detection device and control device, cost are relatively high；And device for power switching seals in main charge back when working normally
Road, and switching device generally has conducting internal resistance, charge circuit high current flows through switching device, and switching power devices are because there is internal resistance
And potential difference is generated, so that device for power switching is generated heat, circuit designers must consider power device heat dissipation problem；Meanwhile power
The portion of energy of MOS switch dissipation, charger output is consumed by device for power switching fever, so reducing charging
The delivery efficiency of device.
Utility model content
The purpose of this utility model is in view of the above problems, providing a kind of charger output reverse-connection preventing circuit, it is able to achieve
There is LED lamp alarm function when not generating heat while anti-reverse and do not influence the delivery efficiency that charges, and being reversely connected；It can also finally cut in time
Disconnected charger is connect with battery, does not damage any other component of charger major loop, avoids burning out battery pack when reversal connection.
In order to achieve the above object, the technical solution adopted in the utility model is: a kind of charger output reverse-connection preventing circuit, it
Including charger output module and battery pack, the battery pack both ends are provided with output plus terminal and output negative terminal；It is described to fill
Charger output reverse-connection preventing circuit module is provided between electric appliance output module and output plus terminal and output negative terminal；It is described to fill
Electric appliance output reverse-connection preventing circuit module includes for the alarm display module of reminder alarm circuit reversal connection situation, for avoiding charging
Circuit Damage by Short Circuit and the overcurrent protection module of circuit components and when for avoiding reversal connection battery output reverse current inflow fill
The reversed water conservancy diversion module of electric appliance output module.
Further, the alarm display module includes current-limiting resistance R1 and indicator light LED1；The current-limiting resistance R1 with
Indicator light LED1 series connection；The overcurrent protection module is a self-recovery fuse F1；The self-recovery fuse F1 and alarm
Display module is connected in parallel on output charger output module anode and the sub- both ends of output plus terminal.
Further, the reversed water conservancy diversion module is a reversed water conservancy diversion diode D1；The reversed water conservancy diversion diode D1
Anode connect with output negative terminal, the cathode of the reversed water conservancy diversion diode D1 and export charger output module anode phase
Even.
The utility model has the beneficial effects that
1, when utility model device works, when charger output polarity is identical as battery polar, reverse-connection preventing circuit is not
It generates heat and does not influence the delivery efficiency that charges；This charger output reverse-connection preventing circuit should not influence normally when battery pack just connects
Charger output module and battery pack are disconnected in battery pack reversal connection, and have warning circuit to prompt to user by charging.
2, utility model device can cut off charger and electricity when charger output polarity is opposite with battery polar in time
Pond connection, does not damage any other component of charger major loop, and has LED prompt battery connection incorrect polarity；Deng reversal connection
After battery is removed by the user, charger can restore to work normally again.
3, in charger output short-circuit, reverse-connection preventing circuit can also cut off and connect with battery utility model device.
Detailed description of the invention
Fig. 1 is the electrical block diagram of the utility model.
Fig. 2 is that charger exports schematic illustration of the reverse-connection preventing circuit when battery pack just connects in the utility model.
Fig. 3 is that charger exports schematic illustration of the reverse-connection preventing circuit when battery pack is reversely connected in the utility model.
Fig. 4 is that charger exports reverse-connection preventing circuit module composition schematic diagram in the utility model.
Fig. 5 is the internal circuit configuration schematic diagram that charger exports reverse-connection preventing circuit module in the utility model.
Fig. 6 is that charger exports schematic illustration of the anti-reverse module when battery pack is reversely connected in the utility model.
In figure: R1 is current-limiting resistance；LED1 is indicator light；F1 is self-recovery fuse；D1 is reversed water conservancy diversion diode.
Specific embodiment
In order to enable those skilled in the art to better understand the technical solutions of the present invention, with reference to the accompanying drawing to this reality
Be described in detail with novel, the description of this part be only it is exemplary and explanatory, should not be to the protection scope of the utility model
There is any restriction effect.
As shown in figs 1 to 6, the specific structure of the utility model are as follows: a kind of charger output reverse-connection preventing circuit, it includes
Charger output module and battery pack, the battery pack both ends are provided with output plus terminal and output negative terminal；The charger
Charger output reverse-connection preventing circuit module is provided between output module and output plus terminal and output negative terminal；The charger
Output reverse-connection preventing circuit module includes for the alarm display module of reminder alarm circuit reversal connection situation, for avoiding charge circuit
Damage by Short Circuit and the overcurrent protection module of circuit components and battery output reverse current flows into charger when for avoiding reversal connection
The reversed water conservancy diversion module of output module.
Preferably, the alarm display module includes current-limiting resistance R1 and indicator light LED1；The current-limiting resistance R1 and finger
Show that lamp LED1 connects；The overcurrent protection module is a self-recovery fuse F1；The self-recovery fuse F1 and alarm are aobvious
Show wired in parallel at output charger output module anode and the sub- both ends of output plus terminal.
Preferably, the reversed water conservancy diversion module is a reversed water conservancy diversion diode D1；The reversed water conservancy diversion diode D1's
Anode is connect with output negative terminal, and the cathode of the reversed water conservancy diversion diode D1 is connected with output charger output module anode.
When device works, attached drawing 1 is seen, when charger output polarity is identical as battery polar, charge current loop is as schemed
In it is shown in solid；It is known that electric current can only be flowed to from potential height, potential is low, the potential UC1 of the output module anode in attached drawing 2
Greater than the potential UC2 of output module negative terminal, so charge current loop is UC1 -- > overcurrent protection module -- > output just
Terminal -- > battery positive UB1 -- > battery negative terminal UB2 -- > output negative terminal -- > UC2；Since overcurrent protection module is not having
Impedance is close to zero when more than its maximum current, so overcurrent protection module both ends potential difference is almost 0V, overcurrent protection module
It does not generate heat inside this circuit and does not influence delivery efficiency；Meanwhile alarm display module is taken from overcurrent protection module both ends
Electricity, at this time due to overcurrent protection module both ends potential difference be 0V, alarm display module obtain 0V voltage without light LED1 not into
Row alarm indication；But when charge circuit current anomaly (electric current excessive or output short-circuit), overcurrent protection module can increase sharply resistance
Value is to cut off the connection of charger output and battery-end, and the voltage of charger output at this time is substantially all in overcurrent protection module two
End, alarm display module directly take electricity from overcurrent protection module both ends and light LED1 and carry out alarm indication；
See attached drawing 1, when charger output polarity is identical as battery polar, reversed water conservancy diversion circuit is as shown in phantom in FIG.；
Since battery just connects, UB2 < UB1, and electric current can only flow to low potential from high potential, so reversed water conservancy diversion circuit does not have electric current
It flows through, reversed water conservancy diversion circuit does not work；
See attached drawing 6, when charger output polarity is opposite with battery polar, reversed water conservancy diversion circuit is as shown by the solid line in the drawings；
Since the anode potential UB2 of battery pack is greater than negative terminal potential UB1, so reverse battery water conservancy diversion circuit is UB2 -- > reversely lead
Flow module -- > overcurrent protection module -- > UB1；Reversed water conservancy diversion module is due to internal resistance very little, the reversed big electricity of reverse battery group output
Stream all directly arrives the negative terminal of battery pack again by reversed water conservancy diversion module to overcurrent protection module, and high current reversed in this way made rapidly
The resistance value for flowing protective module increases, and reversed water conservancy diversion loop current is reduced rapidly；Battery pack backward voltage is since circuit is by mistake simultaneously
Protective module cutting is flowed, all battery voltages are all applied to overcurrent protection module both ends, and alarm display module is from overcurrent protection
Module both ends take electricity and electricity LED1 carries out alarm indication;
See attached drawing 6, when charger output polarity is opposite with battery polar, charge current loop is as shown in phantom in FIG.；
Since the high current in reversed water conservancy diversion circuit makes overcurrent protection module resistance become infinitely great, the same of reversed water conservancy diversion circuit is being cut off
When, charge current loop has also been cut off, so charge current loop does not have electric current to flow through, has played protection battery pack and charger
The effect of itself.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.
Specific case used herein is expounded the principles of the present invention and embodiment, above example
Illustrate the method and its core concept for being merely used to help understand the utility model.The above is only the preferred of the utility model
Embodiment, it is noted that due to the finiteness of literal expression, and objectively there is unlimited specific structure, for this technology
For the those of ordinary skill in field, without departing from the principle of this utility model, several improvement, retouching can also be made
Or variation, above-mentioned technical characteristic can also be combined in the right way；These improve retouching, variation or combination, or not
It is improved that the conception and technical scheme of utility model are directly applied into other occasions, it is regarded as the protection of the utility model
Range.
Claims (3)
1. a kind of charger exports reverse-connection preventing circuit, it includes charger output module and battery pack, and the battery pack both ends are set
It is equipped with output plus terminal and output negative terminal；It is characterized in that, the charger output module and output plus terminal and output are negative
Charger output reverse-connection preventing circuit module is provided between terminal；The charger output reverse-connection preventing circuit module includes for mentioning
The alarm display module for warning circuit reversal connection situation of waking up, the overcurrent guarantor for avoiding charge circuit Damage by Short Circuit and circuit components
Shield module and for avoid reversal connection when battery output reverse current flow into charger output module reversed water conservancy diversion module.
2. a kind of charger according to claim 1 exports reverse-connection preventing circuit, which is characterized in that the alarm display module
Including current-limiting resistance R1 and indicator light LED1；The current-limiting resistance R1 connects with indicator light LED1；The overcurrent protection module is
One self-recovery fuse F1；The self-recovery fuse F1 and alarm display module are being connected in parallel on output charger output module just
Pole and the sub- both ends of output plus terminal.
3. a kind of charger according to claim 1 exports reverse-connection preventing circuit, which is characterized in that the reversed water conservancy diversion module
For a reversed water conservancy diversion diode D1；The anode of the reversed water conservancy diversion diode D1 is connect with output negative terminal, described reversely to lead
The cathode for flowing diode D1 is connected with output charger output module anode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821641319.2U CN209088561U (en) | 2018-10-10 | 2018-10-10 | A kind of charger output reverse-connection preventing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821641319.2U CN209088561U (en) | 2018-10-10 | 2018-10-10 | A kind of charger output reverse-connection preventing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209088561U true CN209088561U (en) | 2019-07-09 |
Family
ID=67118703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821641319.2U Active CN209088561U (en) | 2018-10-10 | 2018-10-10 | A kind of charger output reverse-connection preventing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209088561U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111123451A (en) * | 2019-12-10 | 2020-05-08 | 江苏通鼎宽带有限公司 | Electric distribution circuit, photoelectric integrated distribution unit and communication system cabinet |
| CN113866672A (en) * | 2021-08-31 | 2021-12-31 | 深圳市普兰斯通科技有限公司 | Abnormal state alarm circuit, device and method for charger |
-
2018
- 2018-10-10 CN CN201821641319.2U patent/CN209088561U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111123451A (en) * | 2019-12-10 | 2020-05-08 | 江苏通鼎宽带有限公司 | Electric distribution circuit, photoelectric integrated distribution unit and communication system cabinet |
| CN113866672A (en) * | 2021-08-31 | 2021-12-31 | 深圳市普兰斯通科技有限公司 | Abnormal state alarm circuit, device and method for charger |
| CN113866672B (en) * | 2021-08-31 | 2024-01-30 | 深圳市普兰斯通科技有限公司 | Abnormal state alarm circuit, device and method for charger |
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