CN207638558U - A kind of wide-voltage range translation circuit of DC Module - Google Patents
A kind of wide-voltage range translation circuit of DC Module Download PDFInfo
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- CN207638558U CN207638558U CN201721331857.7U CN201721331857U CN207638558U CN 207638558 U CN207638558 U CN 207638558U CN 201721331857 U CN201721331857 U CN 201721331857U CN 207638558 U CN207638558 U CN 207638558U
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Abstract
A kind of wide-voltage range translation circuit of DC Module, including two groups of isolation DC/DC converter units, AC relay K1/K2, discharge circuit and counnter attack diode D；Relay K1 and contact a is disconnected, is attracted with contact b, and relay K2 and contact c is disconnected, and two groups of isolation DC/DC converter units are exported with cascade；Relay K1 and contact a is attracted, is disconnected with contact b, and relay K2 and contact c is attracted, and two groups of isolation DC/DC converter units are exported with parallel form；Discharge circuit is composed in series by resistance R and switching tube S, and the positive terminal connection of DC/DC converter units is isolated with one of which for discharge circuit upper end, and the lower end of discharge circuit is connected with another group of negative pole end that DC/DC converter units are isolated；When switching tube S conductings, discharge circuit work, when switching tube S is turned off, discharge circuit stops；Width funtion output area can be achieved, solve switching group contact current shock problem, it is at low cost.
Description
Technical field
The utility model belongs to voltage transformation technical field, more particularly to the wide-voltage range transformation electricity of a kind of DC Module
Road.
Background technology
The electric vehicle charging voltage of different manufacturers production currently on the market is not quite similar, the chargeable range one of pony car
As be 200~500Vdc, and the chargeable range of mini-bus and bus is generally 400~800Vdc.In addition, due to manufacturer
There is respective rechargeable standard, even if same type of electric vehicle, charging voltage may also be different.
In order to meet the charging voltage requirement of a variety of electric vehicles, a variety of wide-voltage range outputs are derived in the market
Charging module.A copy of it Publication No.【CN206195615U】Patent in propose a kind of transforming circuit, it includes multiple
DC/DC converter units and switching group complete the serial or parallel connection of DC/DC output ends by the action of switching group, to meet wide electricity
Press the purpose of output.But along with the closure of switching group and disconnection in connection in series-parallel handoff procedure, on the one hand, cut in switching group
There are rush of current for switching group contact during changing, and another aspect switching group is in band direct current handoff procedure to its electrical characteristic
And cost requirement is higher.
Invention content
In order to overcome the above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a kind of Width funtion of DC Module
Range conversion circuit can also solve switching group contact current shock problem, simultaneously while realizing Width funtion output area
Also switch hardware cost can be reduced.
To achieve the above object, the technical solution adopted in the utility model is：
A kind of wide-voltage range translation circuit of DC Module, by two groups of isolation DC/DC converter units, AC relays
K1/K2, discharge circuit and counnter attack diode D compositions；
Every group of isolation DC/DC converter unit has independent voltage output ability, and voltage output range is 200~500V.
Therefore, two groups of isolation DC/DC converter unit connection in series-parallel combinations, which can meet, wants 200~1000V of Width funtion output area
It asks.
The AC relay K1 is double-contact relay, and contact is respectively contact a and contact b.AC relay K2
For single-contact relay, contact is contact c.AC relay K1 and contact a is disconnected, is attracted with contact b, AC relay K2
It is disconnected with contact c, two groups of DC/DC units are exported with cascade；AC relay K1 and contact a is attracted, is disconnected with contact b,
AC relay K2 and contact c is attracted, and two groups of DC/DC units are exported with parallel form.
The discharge circuit is composed in series by resistance R and switching tube MOSFET (S), the upper end of discharge circuit and wherein one
The positive terminal connection of group isolation DC/DC converter units, the cathode that DC/DC converter units are isolated with another group in the lower end of discharge circuit
End connection；When switching tube S is connected, discharge circuit work carries out, and when switching tube S is turned off, discharge circuit work stops.
The counnter attack diode D connects after being located at discharge circuit with the positive terminal of first group of DC/DC unit.
When two groups of isolation DC/DC converter unit output ends are connected with parallel form, if single DC/DC converter units are defeated
When going out voltage beyond its output voltage limit, two groups of isolation DC/DC converter units are out of service, while discharge loop starts fortune
Row discharges the voltage of output end on discharge resistance R, when DC/DC converter units output end voltage to be isolated is close to no-voltage,
Discharge circuit is out of service, and relay K1, K2 switches to series connection, two groups of DC/DC converter unit weights by parallel connection at this time
It is new to start operation to command voltage.Similarly, when two groups of DC/DC output ends are coupled in series, if individually isolation DC/DC becomes
When changing unit output voltage less than series voltage lower limit, two groups of isolation DC/DC converter units are out of service, while discharge loop opens
Dynamic operation, the voltage of output end is released on discharge resistance R, when obstructing DC/DC units output end voltage close to no-voltage,
Discharge circuit is out of service, and relay K1, K2 switches to parallel connection by series connection at this time, and two groups of isolation DC/DC transformation are single
Member restarting is run to command voltage.
The utility model has the beneficial effects that：
Under the premise of same Width funtion output area, which only needs two-way that DC/DC converter units and two are isolated
Group relay forms, and simplifies circuit structure, while reducing switching group cost using AC relay, it is reliable to improve switch motion
Property.Discharge circuit plays the release to counnter attack diode front end electric flux when connection in series-parallel switching action occurs, it is ensured that relay
No-voltage is attracted or disconnects, and protective relay contact non-impact current generates.The introducing of counnter attack diode ensures output simultaneously
End energy cannot be filled by counter, protective separation DC/DC converter unit circuit reliably workings.
Description of the drawings
Fig. 1 is the circuit topological structure figure of the Width funtion output area of the utility model.
Fig. 2 is that the connection in series-parallel of the utility model wide-voltage range output instructs decision flow chart.
Fig. 3 is the specific implementation flow chart of the utility model wide-voltage range output.
Fig. 4 is the utility model charging each modular electrical connection diagram of pile body.
Specific implementation mode
The structural principle of the utility model and operation principle are described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, the Width funtion output area circuit includes two groups of isolation DC/DC converter units, AC relay K1/
K2, discharge circuit and counnter attack diode D compositions.Wherein every group of isolation DC/DC converter unit has independent voltage output ability,
Voltage output range is 200~500V.Therefore, two groups of isolation DC/DC converter unit serial or parallel connections combinations can meet wide electricity
Press the requirement of 200~1000V of output area.AC relay K1 is double-contact relay, and contact is respectively contact a and contact b.
AC relay K2 is single-contact relay, and contact is contact c.Relay K1 and contact a is disconnected, is attracted with contact b, relay
K2 and contact c is disconnected, and two groups of DC/DC units are exported with cascade；Relay K1 and contact a is attracted, is disconnected with contact b, after
Electric appliance K2 and contact c is attracted, and two groups of isolation DC/DC converter units are exported with parallel form.Discharge circuit is by resistance R and switching tube
S is composed in series, and the upper end of discharge circuit is isolated the positive terminal connection of DC/DC converter units with one of which, under discharge circuit
End is connect with the negative pole end of another group of DC/DC unit.When switching tube S is connected, discharge circuit work carries out, when switching tube S is closed
When disconnected, discharge circuit work stops.DC/DC converter units are isolated in counnter attack diode D after discharge circuit with one of which
Positive terminal is connected.Wherein, switching tube S can also select other switching devices except switching tube S.
Fig. 2 show isolation DC/DC converter unit connection in series-parallel instruction decision flow chart.First determine whether current system conditions,
If system is currently at operating status, judge reality output port voltage whether meet isolation DC/DC converter units series connection or
Operation threshold voltage in parallel.If system is in standby, whether decision instruction voltage meets isolation DC/DC converter units
Serial or parallel connection runs thresholding.Then the result that will determine that out is compared with previous bat judging result, if front and back two clap string simultaneously
Connection instruction is inconsistent, then will shut down and identify set, terminates after carrying out connection in series-parallel instruction backup；If front and back two clap connection in series-parallel instruction one
It causes, then continues to execute other functions.
Fig. 3 show the specific implementation flow that isolation DC/DC converter units realize wide-voltage range output.First determine whether as
Shutdown switching in Fig. 2 descriptions identifies whether set, if set is completed, system-down and electric discharge are executed by control unit
Action, until detecting output end voltage close to judging that electric discharge terminates when zero just now, if shutting down switching mark does not complete set, directly
Binding beam；If electric discharge is not finished, system-down and discharging action are continued to execute；Further according to the serial or parallel connection judged in Fig. 2
The corresponding actuating of relay logic of instruction execution, if instruction in parallel is effective, relay K1 and contact a is attracted, relay K2 with
Contact c is attracted, if instruction ignore in parallel, is disconnected with relay K1 and contact b actuations, relay K2 and contact c, is waited for relay
It will be shut down after the completion of action and switch mark reset, then by initiating machine order under control unit, complete the charging to load.
Fig. 4 show the DC power supplier piece electrical connection diagram.Including isolation DC/DC converter units,
Two groups of isolation DC/DC converter units, relay switch unit, electric discharge and counnter attack unit and control unit.Control unit is real-time
The actual output voltage of acquisition isolation DC/DC converter units, according to issuing the information such as command voltage and operating status, comprehensive descision
Isolation DC/DC converter unit start and stop instructions and the actuating of relay order of relay switch unit are issued afterwards, are finally completed two groups
The serial or parallel connection operation of DC/DC converter unit output ends is isolated.
The above only expresses the implementation of the utility model, and description is more detailed and specific, but can not manage
The limitation of pairs of the utility model patent range is solved, as long as technical side obtained in the form of equivalent substitutions or equivalent transformations
Case shall fall within the scope of the present invention.
Claims (2)
1. a kind of wide-voltage range translation circuit of DC Module, which is characterized in that including two groups of isolation DC/DC converter units,
AC relay K1/K2, discharge circuit and counnter attack diode D；
The AC relay K1 is double-contact relay, and contact is respectively contact a and contact b；AC relay K2 is single
Contact relay, contact are contact c；AC relay K1 and contact a is disconnected, is attracted with contact b, AC relay K2 and contact
C is disconnected, and two groups of isolation DC/DC converter units are exported with cascade；AC relay K1 and contact a is attracted, is disconnected with contact b
It opens, AC relay K2 and contact c is attracted, and two groups of isolation DC/DC converter units are exported with parallel form；
The discharge circuit is composed in series by resistance R and switching tube S, and DC/DC is isolated with one of which in the upper end of discharge circuit
The positive terminal of converter unit connects, and the lower end of discharge circuit is connected with another group of negative pole end that DC/DC converter units are isolated；When opening
When closing pipe S conductings, discharge circuit works, and when switching tube S is turned off, discharge circuit is stopped；
The counnter attack diode D connects after being located at discharge circuit with first group of positive terminal that DC/DC converter units are isolated.
2. a kind of wide-voltage range translation circuit of DC Module according to claim 1, which is characterized in that described is every
Group isolation DC/DC converter units can independently carry out voltage output, and voltage output range is 200~500V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721331857.7U CN207638558U (en) | 2017-10-17 | 2017-10-17 | A kind of wide-voltage range translation circuit of DC Module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721331857.7U CN207638558U (en) | 2017-10-17 | 2017-10-17 | A kind of wide-voltage range translation circuit of DC Module |
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| Publication Number | Publication Date |
|---|---|
| CN207638558U true CN207638558U (en) | 2018-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721331857.7U Active CN207638558U (en) | 2017-10-17 | 2017-10-17 | A kind of wide-voltage range translation circuit of DC Module |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110149041A (en) * | 2019-05-24 | 2019-08-20 | 西安特锐德智能充电科技有限公司 | A kind of serial and parallel switching circuit and its control method |
| CN110798073A (en) * | 2019-10-22 | 2020-02-14 | 深圳航天科技创新研究院 | Wide voltage range output current feed converter |
| CN111865085A (en) * | 2020-07-30 | 2020-10-30 | 中车株洲电力机车研究所有限公司 | Control method and control device of combined isolated converter |
| CN114301271A (en) * | 2021-07-05 | 2022-04-08 | 华为数字能源技术有限公司 | Power conversion system and control method |
| WO2023070379A1 (en) * | 2021-10-27 | 2023-05-04 | 宁德时代新能源科技股份有限公司 | Series-parallel switching method and apparatus, power conversion circuit and electronic device |
| WO2023193764A1 (en) * | 2022-04-07 | 2023-10-12 | 深圳英飞源技术有限公司 | Power conversion circuit and control method |
-
2017
- 2017-10-17 CN CN201721331857.7U patent/CN207638558U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110149041A (en) * | 2019-05-24 | 2019-08-20 | 西安特锐德智能充电科技有限公司 | A kind of serial and parallel switching circuit and its control method |
| CN110798073A (en) * | 2019-10-22 | 2020-02-14 | 深圳航天科技创新研究院 | Wide voltage range output current feed converter |
| CN111865085A (en) * | 2020-07-30 | 2020-10-30 | 中车株洲电力机车研究所有限公司 | Control method and control device of combined isolated converter |
| CN114301271A (en) * | 2021-07-05 | 2022-04-08 | 华为数字能源技术有限公司 | Power conversion system and control method |
| CN114301271B (en) * | 2021-07-05 | 2024-03-01 | 华为数字能源技术有限公司 | Power conversion system and control method |
| WO2023070379A1 (en) * | 2021-10-27 | 2023-05-04 | 宁德时代新能源科技股份有限公司 | Series-parallel switching method and apparatus, power conversion circuit and electronic device |
| EP4270760A4 (en) * | 2021-10-27 | 2024-03-13 | Contemporary Amperex Technology Co Ltd | Series-parallel switching method and apparatus, power conversion circuit and electronic device |
| WO2023193764A1 (en) * | 2022-04-07 | 2023-10-12 | 深圳英飞源技术有限公司 | Power conversion circuit and control method |
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