CN209329759U - A kind of non-on-board charger charging circuit - Google Patents
A kind of non-on-board charger charging circuit Download PDFInfo
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- CN209329759U CN209329759U CN201920221816.5U CN201920221816U CN209329759U CN 209329759 U CN209329759 U CN 209329759U CN 201920221816 U CN201920221816 U CN 201920221816U CN 209329759 U CN209329759 U CN 209329759U
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- charging
- direct current
- leadage circuit
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Abstract
The utility model discloses a kind of non-on-board charger charging circuit, including charge controller, charging module and the ac input circuit being electrically connected with charging module input side and the direct current output circuit being electrically connected with charging module outlet side；The direct current output circuit includes direct current energy meter, leadage circuit, insulating monitoring circuit and direct current output contactor；The leadage circuit includes bleeder resistance, leadage circuit switching device and the voltmeter for detecting bleeder resistance both end voltage and the ammeter for detecting electric current in leadage circuit；The direct current energy meter, voltmeter and ammeter are electrically connected with charge controller.By increasing measure voltage & current in leadage circuit, realizes and real time monitoring and effectively control are carried out to leadage circuit.
Description
Technical field
The utility model belongs to electric car charging technique field, in particular to a kind of non-on-board charger charging circuit.
Background technique
With popularizing for electric car, electric car non-on-board charger is also grown rapidly therewith.From national standard, industry
From the point of view of the publication successively of standard and company standard, illustrating the positive gradual perfection of the function of non-on-board charger, standard is unified gradually,
The problems such as deficiency that the knee occurred before avoiding mismatches, charging is interconnected, the low basic utilization rate that charges.The hair of new national standard
Cloth, has carried out emphasis discussion to safeguard protection etc., individually requires especially for leadage circuit.
As shown in connection with fig. 1, it is respectively provided with insulating monitoring circuit (IMD) in charging generator terminal and vehicle end, after power supply interface connection
Before closing a floodgate charging to K5, K6, the insulation inspection (containing charging cable) is responsible for inside charger by charger；The generator terminal that charges
IMD is disconnected by switch from charging DC loop, and during the charging process after K5, K6 combined floodgate, is responsible for by electric car whole
The insulation inspection of a system.After charger carries out IMD detection, it should release in time to charging output voltage, avoid charging
Stage generates voltge surge to cell load.After charging, charger should in time release to charging output voltage, avoid
Electric shock is caused to operator.Clearly stipulate that the parameter selection of leadage circuit should ensure that in charging connection in national standard
Power supply interface voltage is dropped into 60V DC or less in 1s after device disconnects.Although to the function of leadage circuit and performance in national standard
It is distinctly claimed, but different charging equipment design producers are also not quite similar to standard understanding, mentality of designing and implementation method
It is even more far from each other.
From the point of view of routine, electrically-charging equipment manufacturer preferentially select to release the design of relay and bleeder resistance composition leadage circuit
Mode, carries out the switching of leadage circuit by charge controller, but this mode lack the effective monitoring to leadage circuit with
And the feedback of deflated state.For example, in charging ending phase, due to being provided in national standard, charge main circuit current < 5A when, disconnect
K1K2 and vehicle end K5K6 in stake, original sampled point for detecting voltage on the outside of K1K2 will be unable to normally adopt the remnants on major loop
Voltage is unable to ensure in 1s and voltage is released to 60V hereinafter, in addition, if charging module is not because failure is shut down into all
Function may cause tight if putting into leadage circuit judgement is not added will cause to carry out continuing charging to bleeder resistance under extreme case
Weight consequence.
In addition, interior layout is compact in the existing charging charging cabinet for placing electrically-charging equipment, bleeder resistance is once because abnormal
And persistently put into direct current output major loop, it would be possible to burn bleeder resistance, or even cause entire electrically-charging equipment Internal cable
Burning, the accidents such as then cause whole stake on fire.
Utility model content
The utility model discloses a kind of non-on-board charger charging circuit, by increasing voltage and current inspection in leadage circuit
It surveys, it can be achieved that carrying out real time monitoring and effectively control to leadage circuit.
The utility model discloses a kind of non-on-board charger charging circuit, including charge controller, charging module, Yi Jiyu
The ac input circuit of charging module input side electrical connection and the direct current output circuit being electrically connected with charging module outlet side；It is described
Direct current output circuit includes direct current energy meter, leadage circuit, insulating monitoring circuit and direct current output contactor；It is characterized by:
The leadage circuit includes bleeder resistance, leadage circuit switching device and the voltage for detecting bleeder resistance both end voltage
Table and ammeter for detecting electric current in leadage circuit；The direct current energy meter, voltmeter and ammeter are and charge control
Device electrical connection.
As a preferred embodiment, which further includes the temperature for detecting bleeder resistance temperature
Sensor is spent, the temperature sensor is electrically connected with charge controller.
As a preferred embodiment, the leadage circuit switching device is contactor or relay with contact feedback function
Device.
As a preferred embodiment, other components of the bleeder resistance and charging circuit using heat-barrier material individually every
From arrangement.
As a preferred embodiment, the bleeder resistance placement region is also configured with cooling system.
As a preferred embodiment, the cooling system is at least one with radiator fan.
Compared with prior art, the utility model has the following beneficial effects:
(1) it is detected by voltage and current increased in leadage circuit, convenient for understanding the healthy shape of leadage circuit in real time
State, it is ensured that voltage is released to 60V hereinafter, while protecting leadage circuit in 1s, also protects the operation of entire charging circuit.Separately
Outside, the status change data of the leadage circuit of acquisition also has certain reference value to later period leadage circuit components selection.
(2) by carrying out voltage detecting to leadage circuit, it may also be combined with the current measurement criterion of direct current energy meter, so that letting out
The timing of electric discharge road switching is more reasonable, guarantees the safe and stable operation of entire charging circuit.Especially terminate rank in charging
Section, avoids because can not detect the residual voltage on major loop, be unable to ensure leadage circuit it is out of service when voltage whether
It releases to 60V or less bring security risk.In addition, can also control leadage circuit voltage by the voltage detecting value of feedback and exist
When dropping to 60V, switching device of releasing is cut off, immediately to avoid unnecessary delay.
(3) by increasing the temperature monitoring to bleeder resistance, convenient for understanding the temperature change of bleeder resistance in real time, if charging
When controller detects temperature anomaly, it can disconnect and release relay or stop charging module output, give warning in advance, while also to letting out
Electric discharge resistance type selecting has certain guidance meaning.
(4) there is the leadage circuit switching device of contact feedback function by selecting, in real time feed back to its operating status
Charge controller detects its operation conditions convenient for charge controller, grasps its performance.
(5) based on practical experience, bleeder resistance is individually isolated in charging cabinet, even if temperature anomaly is damaged, is only limitted to
Region at one do not influence All other routes or electrical component, avoids causing entire charging circuit to burn because of burning for bleeder resistance
Safety accident.
Detailed description of the invention
Fig. 1 is the charging circuit schematic diagram of non-on-board charger in the prior art；
Fig. 2 is the circuit connection diagram in the direct current output circuit of non-on-board charger in embodiment；
Fig. 3 is the control principle drawing of non-on-board charger in embodiment；
Fig. 4 is the multi-stage protection schematic diagram of non-on-board charger in embodiment；
Fig. 5 is bleeder resistance area of isolation schematic diagram in charging cabinet in embodiment.
Specific embodiment
The technical solution of the utility model is further illustrated with reference to the accompanying drawings and detailed description.
During the charging process, entire charging timing is usually integrally controlled by charge controller, is connected by obtaining point therewith
Other component parameters and state feedback, to judge and execute corresponding charging flow.It is tied after insulating monitoring with charging
Shu Hou is both needed to switching leadage circuit, and the parameter selection of leadage circuit should ensure that and guarantee electricity in 1s after putting into leadage circuit
Pressure falls below 60V.
The utility model is right in view of accident caused by failure of releasing in practical application on the basis of meeting national standard
Existing leadage circuit improves, and increases voltage, electric current and temperature detection device, further can also return to connection direct current output
The type selecting of the leadage circuit switching device on road is required.
Embodiment discloses a kind of charging circuit of non-on-board charger, mainly by charging major loop and charge control loop structure
At, wherein charge control loop mainly includes charge controller, and charging major loop mainly includes that sequentially connected exchange inputs back
Road, charging module and direct current output circuit.As shown in connection with fig. 2, direct current output circuit mainly includes direct current energy meter (WH3), melts
Disconnected device (FUSE), leadage circuit, insulating monitoring circuit (IMD), direct current output contactor (K1K2) and for voltage on the outside of K1K2
The high pressure sampling module (CY) of sampling.Leadage circuit mainly includes bleeder resistance, leadage circuit voltmeter (hereinafter referred to as voltage
Table), leadage circuit ammeter (hereinafter referred to as ammeter) and relay of releasing (3ZK).Wherein, direct current energy meter, voltmeter, electricity
Flow table and release relay with the charge controller connection communication in charge control loop, by relevant parameter detected value or itself
State feeds back to charge controller, and charge controller then issues corresponding control instruction according to feedback information.In addition, direct current energy
Table can also connect TCU (national grid and the exclusive module of south electric network, full name " charging control unit "), be mainly used for charging
It the start and stop of system, charging and is communicated with national electric car data center backstage.
As shown in connection with fig. 3, charge controller with direct current energy meter by communicating, it can be seen that voltage and current in output loop
Size judges the state of charging module, and combines the status information of the related device containing feedback contact, judges locating for charging flow
Stage.For example, putting into leadage circuit after insulation, K1K2 is disconnected after releasing, at this point, charge controller passes through K1K2's
Whether feedback contact can determine whether to release terminates.Charge controller obtains DC output circuit by communicating with direct current energy meter
Electric current and the inside K1K2 voltage, by control relay 2K come switching insulating monitoring circuit, by control relay 3ZK come switching
Leadage circuit.Charge controller also passes through the voltage and current that the voltage and current table in leadage circuit obtains and monitors leadage circuit
Situation.
It is designed based on foregoing circuit, after insulating monitoring, charge controller gets the straight of direct current energy meter detection
When flowing the current feedback in output circuit, and judging that average anode current is less than or equal to 2A, issues leadage circuit and put into operation finger
It enables, at this point, relay 3ZK closure, to respond the instruction, leadage circuit is connected to charging output loop and comes into operation.It was releasing
Cheng Zhong, by the voltage value Real-time Feedback at bleeder resistance both ends to charge controller, ammeter will be let out the voltmeter in leadage circuit
Also Real-time Feedback is to charge controller for current value in electric discharge road, and charge controller is according to feedback of voltage and current value control vent discharge
The switching on road.When charge controller is when judging that bleeder resistance both end voltage is less than 60V, the cutting of sending leadage circuit refers to immediately
It enables, relay 3ZK is disconnected, and leadage circuit stops working.In the process, the charge controller also recordable time released every time
Length counts, the ginseng to judge the performance superiority and inferiority of leadage circuit component, as later period components selection for follow-up data
It examines.In addition, the service life of leadage circuit component can also be judged according to the variation for time of releasing every time, for example, first
It is secondary in use, 500V, which releases, needs 1S to 60V, but with the aging of component, the time of releasing gradually more than 1S, at this point, may
Leadage circuit component need to be maintained or replaced.At the same time, the current value Real-time Feedback that ammeter will test is filled
Electric controller, to monitor the curent change in leadage circuit in real time.
According to the working principle of leadage circuit, after leadage circuit is put into, the voltage and current value in leadage circuit can be in finger
Number rapid decrease.During releasing, when the current value that charge controller receives ammeter feedback is basically unchanged or declines slow,
Judge that leadage circuit breaks down, then issue halt instruction, charging module is out of service, disconnects the relay in leadage circuit
3ZK。
Similarly, after charging, start leadage circuit.It releases it should be noted that starting after with insulating monitoring
Unlike circuit: after insulating monitoring, K1K2 is not turned off, and charging can be carried out by the voltage sample on the outside of K1K2 and is led back
The voltage detecting on road；And after charging, before K1K2 need to be disconnected first, and K1K2 is disconnected, the electric current in direct current output circuit is answered small
In 5A.After K1K2 is disconnected, will lead to can not be detected the voltage in charging major loop by high pressure sampling module, therefore,
In practical applications, to guarantee safety, time-delay closing is used generally according to experience to ensure voltage drop as low as 60V or less.For example,
In actual operation: voltage only just may be down to 60V hereinafter, having resulted in unnecessary prolong at this time with 0.1S by leadage circuit
When；Or due to leadage circuit aging, it cannot be still down to 60V after the delay 3S of design, there is some potential safety problems at this time.
The utility model just can solve the above problem, understanding promptly and accurately by increasing ammeter and voltmeter in bleed-off circuit
The working condition and charging major loop state of leadage circuit.
Charging control logic meets national standard, guarantees that charge controller program is stablized, it is ensured that motherboard hardware is normal.This reality
The output electric current of DC bus is detected by direct current energy meter before the insulating monitoring stage, insulating monitoring circuit investment with novel,
If forbidding putting into leadage circuit more than 2A.The utility model combination national standard enhances software to the switching timing requirements of leadage circuit
Defencive function is realized by increase to the voltage sample at bleeder resistance both ends, the current sample of leadage circuit to leadage circuit
Real time monitoring.During monitoring, once the relay that monitors to release should be off-state, and bleeder resistance both ends there are still
Any moment current value is greater than 2A in the voltage or leadage circuit of 60V or more, then hard stop is protected, and is reported and released
Fault.
Switching device (for example, relay, contactor) in charging circuit accomplishes not tripping, not malfunction, seeks to having
The relay or contactor that may cause safety problem increase feedback function.But the switching device in leadage circuit used at present
Be mostly with spring relay, do not have contact feedback function (state feedback).As a preferred embodiment, it in embodiment, releases
Relay or contactor replacement with contact feedback function can be selected in the switching device of circuit, for example, the LEV- of producer SCII
50-24D, charge controller can detect the health status (example of relay or contactor by its remote signalling detection function
Such as, if exist viscous glutinous), control charging module stops charging and when detecting that device occurs abnormal, and charging major loop stops
Work, and reporting fault.
As a preferred embodiment, at least one can also be increased in leadage circuit for detecting bleeder resistance temperature
Temperature sensor.Temperature sensor equally with charge controller communication connection, will test temperature data and feed back to charge control
Feedback temperature value is compared by device, charge controller with preset threshold temperature.Here threshold temperature may include it is multiple,
For example, issuing alarm command when being more than 150 degree of threshold temperature, when being more than 200 degree of threshold temperature, then directly issues and shut down
Instruction.In addition, the temperature data recorded by the temperature sensor and its variation, also have certain finger to the type selecting of bleeder resistance
Lead meaning.
In actual use, relay failure of releasing occurred, was also dropped in major loop always, bleeder resistance can be made to hold
Supervention heat, temperature rise to always nearly 400 DEG C, lead to cable burning around, can even fry after the accumulation of bleeder resistance internal energy
It splits.As shown in connection with fig. 5, meet above-mentioned software and hardware level protection on the basis of, the utility model can also further from
The integral structure layout of leadage circuit considers, burns being easy to appear in leadage circuit, bring the leadage circuit of fire incident into
Row isolation is designed with blocking.
As shown in connection with fig. 4, in the cabinet arrangement of charging cabinet, relay of releasing can be arranged in a relatively independent area
Domain, and cooling system is designed in this region, and other functional units (such as charging control unit, charge controller, gauge table
Meter, charging interface, human-computer interaction interface etc.) design other regions in the cabinet outside the region.Specifically, can be horizontal in cabinet
It is used as bleeder resistance placement region to interception a part, is greater than 10cm, the area away from other components or route around bleeder resistance
Domain can be located at the top of cabinet, may be alternatively located at middle part or lower part.Cooling system therein may include for being arranged in bleeder resistance
The heat-barrier material (for example, quartz sand keeping apart on one side by bleeder resistance fever most serious can be used) of surrounding, for being released
The radiator fan etc. of relay cooling is avoided because of cable or other elements burning caused by thermal current under extreme case, to guarantee
The normal work of other functional units.
In conclusion the voltage that the utility model is exported by the current value and voltmeter that export to direct current energy meter
Value, controls the switching of leadage circuit, the opportunity for the switching that guarantees to release；Pass through the output valve of ammeter and voltmeter, real time monitoring
The working condition of leadage circuit；In conjunction with the statistics to switching initial time of releasing, judgement is released the performance superiority and inferiority of parameter, thus right
The parameter type selecting of leadage circuit component has certain guidance meaning.By the way that temperature sensor is added, bleeder resistance can be obtained
Real-time temperature values.Further, also leadage circuit region individually can be isolated, prevented because under extreme case, bleeder resistance
The heat of generation influences the normal operation of other functional modules.
The preferable specific embodiment of the above, only the application, but the protection scope of the application is not limited thereto,
Within the technical scope of the present application, any changes or substitutions that can be easily thought of by anyone skilled in the art,
Should all it cover within the scope of protection of this application.Therefore, the protection scope of the application should be with scope of protection of the claims
Subject to.
Claims (6)
1. a kind of non-on-board charger charging circuit, including charge controller, charging module and with charging module input side electricity
The ac input circuit of connection and the direct current output circuit being electrically connected with charging module outlet side；The direct current output circuit includes
Direct current energy meter, leadage circuit, insulating monitoring circuit and direct current output contactor；It is characterized by: the leadage circuit includes
It bleeder resistance, leadage circuit switching device and voltmeter for detecting bleeder resistance both end voltage and releases for detecting
The ammeter of electric current in circuit；The direct current energy meter, voltmeter and ammeter are electrically connected with charge controller.
2. non-on-board charger charging circuit as described in claim 1, which is characterized in that further include for detecting bleeder resistance
The temperature sensor of temperature, the temperature sensor are electrically connected with charge controller.
3. non-on-board charger charging circuit as described in claim 1, which is characterized in that the leadage circuit switching device is
Contactor or relay with contact feedback function.
4. non-on-board charger charging circuit as described in claim 1, which is characterized in that the bleeder resistance and charging circuit
Other components arrangement is individually isolated using heat-barrier material.
5. non-on-board charger charging circuit as claimed in claim 4, which is characterized in that the bleeder resistance placement region is also
Configured with cooling system.
6. non-on-board charger charging circuit as claimed in claim 5, which is characterized in that the cooling system be at least one with
Radiator fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920221816.5U CN209329759U (en) | 2019-02-21 | 2019-02-21 | A kind of non-on-board charger charging circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920221816.5U CN209329759U (en) | 2019-02-21 | 2019-02-21 | A kind of non-on-board charger charging circuit |
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| Publication Number | Publication Date |
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| CN209329759U true CN209329759U (en) | 2019-08-30 |
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| CN201920221816.5U Active CN209329759U (en) | 2019-02-21 | 2019-02-21 | A kind of non-on-board charger charging circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112477669A (en) * | 2020-12-25 | 2021-03-12 | 深圳市永联科技股份有限公司 | Fault self-recognition protection method for charging module output key device |
-
2019
- 2019-02-21 CN CN201920221816.5U patent/CN209329759U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112477669A (en) * | 2020-12-25 | 2021-03-12 | 深圳市永联科技股份有限公司 | Fault self-recognition protection method for charging module output key device |
| CN112477669B (en) * | 2020-12-25 | 2022-04-26 | 深圳市永联科技股份有限公司 | Fault self-recognition protection method for charging module output key device |
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