CN206498237U - A kind of direct-current charging post circuit - Google Patents
A kind of direct-current charging post circuit Download PDFInfo
- Publication number
- CN206498237U CN206498237U CN201720186798.2U CN201720186798U CN206498237U CN 206498237 U CN206498237 U CN 206498237U CN 201720186798 U CN201720186798 U CN 201720186798U CN 206498237 U CN206498237 U CN 206498237U
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- Prior art keywords
- thermistor
- rectifier bridge
- relay
- direct
- charging
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Abstract
A kind of direct-current charging post circuit, including thermistor, relay, rectifier bridge, contactor and charging inlet, one end of thermistor is connected with the live wire of AC network, the other end of thermistor is connected with an input of rectifier bridge, another input of rectifier bridge is connected with the zero line of AC network, the output end of rectifier bridge is connected by the main contacts of contactor with charging inlet, and the output end of rectifier bridge is also parallel with filter capacitor, the normally opened contact of relay is in parallel with thermistor, the coil of relay is in parallel with charging inlet, the utility model causes charging transient of starting shooting, thermistor can be by Inrush current restraining a to proper level, afterwards relay coil from charging inlet obtain it is electric after act, thermistor is cut from operating circuit, thermistor only works on startup, and do not access circuit during normal work then, the service life of thermistor was so both extended, ensure that it has sufficient cool time again, and then ensure that the charging safety of electric automobile.
Description
Technical field
The utility model is related to technical field of new energy, and in particular to a kind of direct-current charging post circuit.
Background technology
Electric automobile direct-current charging post has charging fast because of it, and high-power advantage obtains the extensive use of people.It is existing
The power of technology direct-current charging post is general between 2KW ~ 6KW, but can produce surge current to charging load in powered on moment,
Surge is also surging, is just above the transient overvoltage of normal voltage, refers generally to the short time occurred in power network as " wave "
High voltage caused by big electricity, surge current can damage the charging circuit and its part of electric automobile.
Utility model content
The utility model uses thermistor to solve the above mentioned problem of prior art presence there is provided one kind, can have
Effect suppresses the direct-current charging post circuit for the surge current that charging transient is produced.
To achieve the above object, the utility model provides a kind of direct-current charging post circuit, including thermistor, relay
Device, rectifier bridge, contactor and charging inlet, one end of the thermistor are connected with the live wire of AC network, thermistor
The other end is connected with an input of rectifier bridge, and another input of rectifier bridge is connected with the zero line of AC network, the rectification
The output end of bridge is connected by the main contacts of contactor with charging inlet, and the output end of rectifier bridge is also parallel with filter capacitor,
The normally opened contact of the relay is in parallel with thermistor, and coil and the charging inlet of the relay are in parallel.
As optimal technical scheme of the present utility model, the output end of the thermistor is also in series with fuse.
As optimal technical scheme of the present utility model, the direct-current charging post circuit also includes controller and electric energy meter,
The break-make that the controller is connected for control contactor with the auxiliary contact of contactor, the electric energy meter is transformer electric energy
Table, the mutual inductor of the electric energy meter is series at the input of rectifier bridge, and the communication terminal of electric energy meter uses RS485T communication cables
It is connected with controller.
Direct-current charging post circuit of the present utility model can reach following beneficial effect：
Direct-current charging post circuit of the present utility model, by including thermistor, relay, rectifier bridge, contactor and filling
Electrical interface, one end of the thermistor is connected with the live wire of AC network, the other end of thermistor and the one of rectifier bridge defeated
Enter end to be connected, another input of rectifier bridge is connected with the zero line of AC network, and the output end of the rectifier bridge passes through contactor
Main contacts be connected with charging inlet, and the output end of rectifier bridge is also parallel with filter capacitor, the normally opened contact of the relay
It is in parallel with thermistor, coil and the charging inlet of the relay are in parallel so that charging pile is in charging electric vehicle
Moment, thermistor can be by Inrush current restraining to a suitable level, the normal working voltage of charging inlet output afterwards, this
When relay coil from charging inlet obtain it is electric after act, cut thermistor short circuit and from operating circuit, such temperature-sensitive electricity
Resistance only works when product starts, and does not access circuit then when working properly, has so both extended the use longevity of thermistor
Life, ensures that it has sufficient cool time, and then ensure that the charging safety of electric automobile again.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
The structural representation for the example that Fig. 1 provides for the utility model direct-current charging post circuit.
In figure：FR, fuse, NTC, thermistor, K1, relay, UR, rectifier bridge, K2, contactor, C, filter capacitor.
The utility model purpose is realized, functional characteristics and advantage will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described further.In preferred embodiment
Cited such as " on ", " under ", "left", "right", only " centre " and " one " term, understanding for ease of narration, and be not used to
The enforceable scope of the utility model is limited, being altered or modified for its relativeness is changed under technology contents without essence, when also
It is considered as the enforceable category of the utility model.
The structural representation for the example that Fig. 1 provides for the utility model direct-current charging post circuit, as shown in figure 1, direct current
Charging pile circuit includes thermistor NTC, relay K1, rectifier bridge UR, contactor K2 and charging inlet, the thermistor
NTC one end is connected with the live wire of AC network, and the thermistor NTC other end is connected with a rectifier bridge UR input, whole
Stream bridge UR another input is connected with the zero line of AC network, and the output end of the rectifier bridge UR is touched by contactor K2 master
Point is connected with charging inlet, and rectifier bridge UR output end is also parallel with filter capacitor C, the normally opened contact of the relay K1 and
Thermistor NTC is in parallel, and the coil of the relay K1 is in parallel with charging inlet.
As shown in figure 1, the output end of the thermistor NTC is also in series with fuse FR, the direct-current charging post circuit
Also include controller and electric energy meter, the controller is connected with contactor K2 auxiliary contact for the logical of control contactor K2
Disconnected, the electric energy meter is mutual-inductor electric energy meter, and the mutual inductor of the electric energy meter is series at rectifier bridge UR input, electric energy meter
Communication terminal be connected using RS485T communication cables with controller.
In order to allow those skilled in the art to more fully understand and realize the technical solution of the utility model, brief description sheet
The implementation method of embodiment.
The thermistor NTC of a power-type is concatenated in charging pile major loop, can effectively suppress the booting moment that charges
When surge current, and after Inrush current restraining effect is completed, due to the continuous action by its electric current, power-type temperature-sensitive electricity
A very small degree will be declined by hindering NTC resistance, and the power that it is consumed can be ignored, will not be to normal work electricity
Stream is impacted, and is to suppress surge current protection electronic equipment so using the thermistor NTC of power-type in electric power loop
Exempt from destroyed the easiest and effective measures.
In addition, relay K1 coils from the charging load circuit that charging inlet is electric automobile obtain it is electric after act, by temperature-sensitive
Resistance NTC is cut from operating circuit, and such thermistor NTC only works when product starts, and when product normal work
Circuit is not accessed then.Thermistor NTC service life had so both been extended, has ensured that it has sufficient cool time again, can have been fitted
For the application scenario for needing to frequently switch on.
In actual use, thermistor NTC type selecting will consider following factor：
1st, maximum rated voltage and filter capacitor C values
Filter capacitor C size, which is determined, select more large-sized thermistor NTC.For the temperature-sensitive of some size
For resistance NTC, it is allowed to which the filter capacitor C of access size has strict demand, this value also has with maximum rated voltage
Close.In the application of charging pile electric current, surge charges because of electric capacity to be produced, therefore is generally connect with allowing under given voltage value
The capacitance entered assesses the ability that thermistor NTC bears surge current.Come for some specific thermistor NTC
Say, the ceiling capacity that can bear has determined that, can according to energy expenditure formula E=1/2 × CV2 of resistance in firstorder circuit
To find out, the capacitance of its access allowed and square being inversely proportional for rated voltage.In simple terms, it is exactly that input voltage is bigger,
Allow access maximum capacitor value just it is smaller, vice versa.
The specification of thermistor NTC products is generally defined allows the maximum capacitor value of access under 220Vac.Assuming that certain
The maximum rated voltage of application conditions is 420Vac, and filter capacitor C values are 200 μ F, can be converted into according to above-mentioned energy theorem
Equivalent capacitance value under 220Vac should be 200 × 4202/2202=729 μ F, must just select to permit under 220Vac so in type selecting
Perhaps access capacitance is more than 729 μ F model.
2nd, charging pile allows maximum starting current value and the long-term operating current being carried on thermistor NTC
The maximum starting current value that charging pile circuit allows determines thermistor NTC resistance.Assuming that source nominal is defeated
Enter for 220Vac, internal resistance is 1 Ω, it is allowed to maximum starting current be 60A, then the minimum resistance chosen in an initial condition is
Rmin=(220×1.414/60)-1=4.2(Ω).So far, meet condition thermistor NTC typically have it is one or more,
Now selected in the following way again.During product normal work, the electric current being carried in for a long time on thermistor NTC should be little
In electric current as defined in specifications.One is picked out in being more than 4.2 Ω multiple resistance from resistance according to this principle to be adapted to
Resistance.Certainly this is referred in the case of normal temperature.If the environment temperature of work is not normal temperature, it is necessary to by what is be mentioned below
Principle carries out thermistor NTC design of Reducing Rating.
Although the foregoing describing embodiment of the present utility model, those skilled in the art should manage
Solution, these are merely illustrative of, and can make various changes or modifications to present embodiment, without departing from original of the present utility model
Reason and essence, protection domain of the present utility model are only limited by the claims that follow.
Claims (3)
1. a kind of direct-current charging post circuit, it is characterised in that including thermistor, relay, rectifier bridge, contactor and charging
Mouthful, one end of the thermistor is connected with the live wire of AC network, the other end of thermistor and an input of rectifier bridge
It is connected, another input of rectifier bridge is connected with the zero line of AC network, the master that the output end of the rectifier bridge passes through contactor
Contact is connected with charging inlet, and the output end of rectifier bridge is also parallel with filter capacitor, normally opened contact and the heat of the relay
Quick resistance is in parallel, and coil and the charging inlet of the relay are in parallel.
2. according to the direct-current charging post circuit described in claim 1, it is characterised in that the output end of the thermistor is also connected
There is fuse.
3. according to the direct-current charging post circuit described in claim 1 or 2, it is characterised in that the direct-current charging post circuit is also wrapped
Include controller and electric energy meter, the break-make that the controller is connected for control contactor with the auxiliary contact of contactor, the electricity
Energy table is mutual-inductor electric energy meter, and the mutual inductor of the electric energy meter is series at the input of rectifier bridge, and the communication terminal of electric energy meter is adopted
It is connected with RS485T communication cables with controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720186798.2U CN206498237U (en) | 2017-02-28 | 2017-02-28 | A kind of direct-current charging post circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720186798.2U CN206498237U (en) | 2017-02-28 | 2017-02-28 | A kind of direct-current charging post circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206498237U true CN206498237U (en) | 2017-09-15 |
Family
ID=59806952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720186798.2U Expired - Fee Related CN206498237U (en) | 2017-02-28 | 2017-02-28 | A kind of direct-current charging post circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206498237U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108173266A (en) * | 2018-01-25 | 2018-06-15 | 北京航天发射技术研究所 | A kind of DC uninterrupted electric power system and method for supplying power to |
| CN110601562A (en) * | 2019-08-02 | 2019-12-20 | 中国电子科技集团公司第三十八研究所 | Novel power distribution system control device and strategy for rectification power supply and radar |
| CN112689794A (en) * | 2018-09-14 | 2021-04-20 | 高途乐公司 | Electrical connection between removable parts |
| CN113765080A (en) * | 2021-08-31 | 2021-12-07 | 长春捷翼汽车零部件有限公司 | Circuit, method, charging device and storage medium for suppressing power supply starting surge |
-
2017
- 2017-02-28 CN CN201720186798.2U patent/CN206498237U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108173266A (en) * | 2018-01-25 | 2018-06-15 | 北京航天发射技术研究所 | A kind of DC uninterrupted electric power system and method for supplying power to |
| CN112689794A (en) * | 2018-09-14 | 2021-04-20 | 高途乐公司 | Electrical connection between removable parts |
| US11601575B2 (en) | 2018-09-14 | 2023-03-07 | Gopro, Inc. | Electrical connectivity between detachable components |
| CN110601562A (en) * | 2019-08-02 | 2019-12-20 | 中国电子科技集团公司第三十八研究所 | Novel power distribution system control device and strategy for rectification power supply and radar |
| CN110601562B (en) * | 2019-08-02 | 2020-11-06 | 中国电子科技集团公司第三十八研究所 | Novel radar power distribution system control method |
| CN113765080A (en) * | 2021-08-31 | 2021-12-07 | 长春捷翼汽车零部件有限公司 | Circuit, method, charging device and storage medium for suppressing power supply starting surge |
| WO2023029962A1 (en) * | 2021-08-31 | 2023-03-09 | 长春捷翼汽车零部件有限公司 | Circuit and method for suppressing power supply starting surge, charging apparatus, and storage medium |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170915 Termination date: 20200228 |