CN203967966U - The DCDC power protecting circuit of electric automobile - Google Patents
The DCDC power protecting circuit of electric automobile Download PDFInfo
- Publication number
- CN203967966U CN203967966U CN201420390284.5U CN201420390284U CN203967966U CN 203967966 U CN203967966 U CN 203967966U CN 201420390284 U CN201420390284 U CN 201420390284U CN 203967966 U CN203967966 U CN 203967966U
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Abstract
The DCDC power protecting circuit that the utility model discloses a kind of electric automobile, comprising: diode, resistance, electric capacity, relay and control circuit; This diode is connected with this resistance, this diode is connected respectively power circuit input and power output end with the two ends of the series circuit of this resistance, this diode is in parallel with this relay with the series circuit of this resistance, the two ends of this relay connect respectively power circuit input and power output end, this electric capacity is in parallel with the input of this power circuit, and be connected with the series circuit of this resistance with this diode, this control circuit connects this power circuit control end and this Control end; Wherein, this control circuit is sampled to the voltage of this electric capacity, and according to an external command and sampled result, controls the break-make of this relay.
Description
Technical field
The utility model relates to electric vehicle engineering field, particularly a kind of DCDC power protecting circuit of electric automobile.
Background technology
Along with the development of electric automobile, for ensureing the power supply of electric automobile low voltage control system, electric automobile DCDC power supply has also obtained great development as the indispensable auxiliary products of electric automobile electric-control system.In prior art, mainly realized power conversion, by electrokinetic cell high pressure conversion, be the low pressure of electric-control system energy use, but the in the situation that of electric automobile frequent starting, can on high voltage supply bus, produce surge current and impact, cause the switching device between power supply buses and DCDC power supply to damage.Make electric-control system and switching device produce fault.
Utility model content
The purpose of this utility model is to provide a kind of DCDC power protecting circuit of electric automobile; to solve the electric automobile frequent starting in the situation that; can on high voltage supply bus, produce surge current impacts; cause the switching device between power supply buses and DCDC power supply to damage, make electric-control system and switching device produce the problem of fault.
The DCDC power protecting circuit of a kind of electric automobile of the utility model, comprising: diode, resistance, electric capacity, relay and control circuit; This diode is connected with this resistance, this diode is connected respectively power circuit input and power output end with the two ends of the series circuit of this resistance, this diode is in parallel with this relay with the series circuit of this resistance, the two ends of this relay connect respectively power circuit input and power output end, this electric capacity is in parallel with the input of this power circuit, and be connected with the series circuit of this resistance with this diode, this control circuit connects this power circuit control end and this Control end; Wherein, this control circuit is sampled to the voltage of this electric capacity, and according to an external command and sampled result, controls the break-make of this relay.
According to an embodiment of the DCDC power protecting circuit of a kind of electric automobile of the utility model, wherein, the anode of this diode is connected with this power output end.
According to an embodiment of the DCDC power protecting circuit of a kind of electric automobile of the utility model; wherein; as being appointed as start-up command in this outside that this control circuit is received; this control circuit is sampled to the voltage of this electric capacity; the voltage that this control circuit detects this electric capacity of sampling reaches a threshold voltage; this control circuit sends adhesive instruction to this relay, and after this relay adhesive, this control circuit sends enabled instruction to this power circuit.
According to an embodiment of the DCDC power protecting circuit of a kind of electric automobile of the utility model, wherein, this control circuit sends after adhesive instruction this relay, postpones 100mS and sends enabled instruction to this power circuit.
According to an embodiment of the DCDC power protecting circuit of a kind of electric automobile of the utility model; wherein, this control circuit receives after shutdown command, to this power circuit, sends halt instruction; after this power circuit stops, this control circuit sends open command to this relay.
According to an embodiment of the DCDC power protecting circuit of a kind of electric automobile of the utility model, wherein, this control circuit sends after halt instruction to this power circuit, postpones 100ms and sends open command to this relay.
According to an embodiment of the DCDC power protecting circuit of a kind of electric automobile of the utility model; wherein; the negative terminal of this power supply connects the negative input end of this power circuit; the anode of this power supply connects one end of series circuit and one end of this relay of this diode and this resistance; the positive input terminal of this power circuit connects the other end of series circuit and the other end of this relay of this diode and this resistance, and the two ends of this electric capacity connect respectively the positive-negative input end of this power circuit.
According to an embodiment of the DCDC power protecting circuit of a kind of electric automobile of the utility model, wherein, the control signal output of this control circuit connects the control signal input of this power circuit.
To sum up; the utility model is improved for the defect of above-mentioned conventional DCDC power supply; the DCDC power protecting circuit of electric automobile comprises the resistance R of surge current suppression, anti-reverse protection diode D, relay K and control circuit etc.; to input voltage sampling and switching on and shutting down instruction process, relay is sent to corresponding control command.By the control to relay, realize and suppress surge and anti-reverse protection.
Accompanying drawing explanation
Figure 1 shows that the principle signal of the DCDC power protecting circuit of the utility model electric automobile;
Figure 2 shows that the startup workflow diagram of the DCDC power protecting circuit of electric automobile;
Figure 3 shows that electric automobile DCDC power protecting circuit close workflow diagram.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the video intercom service system based on hybrid network of the present utility model is further described.
Figure 1 shows that the principle schematic of the DCDC power protecting circuit of the utility model electric automobile, as shown in Figure 1, the DCDC power protecting circuit of electric automobile comprises: diode D, resistance R, capacitor C, relay 5 and control circuit 2.
Shown in Fig. 1, diode D and resistance R are connected in series, and diode D is in parallel with relay 5 with the series circuit of resistance R.The series circuit of diode D and circuit R and relay 5, be connected between the anode of power supply 1 and the positive input terminal of power circuit 4, and the anode of diode D is connected with the anode of power supply 1.The two ends of capacitor C connect respectively positive input terminal and the negative input end of power circuit 4.The negative terminal of power supply 1 connects the negative input end of power circuit 4.Control circuit 2 connects the anode of capacitor C, with the voltage to capacitor C, samples.The first control signal output of control circuit 2 connects relay 5, and so that the action of relay 5 is controlled, the second control signal output of control circuit 2 connects power circuit 4, so that the action of power circuit 4 is controlled.
Wherein, the object that diode D is set is in order to prevent circuit reversal connection.And the object that resistance R is set is by the opening/closing time of control relay 5, in the time period that may have surge current, relay 5 is opened, make the flow through series circuit of resistance R and diode D of electric current, with surge current suppression, and in other periods, closed relay 5, make the electric current relay 5 of flowing through, the series circuit of resistance R and diode D is by short circuit.So, DCDC power protecting circuit can reach the effect that surge current impacts and prevents circuit reversal connection.
In addition, with reference to figure 1, an accessory power supply 3 can also be set, to power to control circuit 2 and relay 5.
Figure 2 shows that the startup workflow diagram of the DCDC power protecting circuit of electric automobile, the startup workflow of sketching the utility model DCDC power protecting circuit according to Fig. 1 and Fig. 2, specifically starts workflow and comprises:
Step 101, switch S 1 and S2 close, and power supply 1 is charged to capacitor C by diode D and resistance R;
Step 102, electric vehicle control system send start-up command to control circuit 2;
Step 103, control circuit 2 receive after outside start-up command, the voltage of 2 pairs of capacitor C of control circuit is sampled, with and judge whether the voltage of capacitor C reaches certain threshold value, for example, can judge whether capacitor C is full of, if electric capacity is full of, perform step 103, otherwise, repeat said process;
Step 104, control circuit 2 send adhesive instruction to relay 5, and relay 5 adhesives make power supply 1 to power circuit 4 power supplies, and resistance R and diode D are by short circuit;
Step 105, control circuit 2 postpone a period of time, for example, postpone 100ms, to power circuit 4, send enabled instruction;
Step 106, power circuit 4 start.
Figure 3 shows that electric automobile DCDC power protecting circuit close workflow diagram, the workflow of closing of sketching the utility model DCDC power protecting circuit according to Fig. 1 and Fig. 3, specifically close workflow and comprise:
Step 201, outside to control circuit 2 transmission shutdown commands;
Step 202, as control circuit 2 receives shutdown command, perform step 203, otherwise continue to receive shutdown command;
Step 203, control circuit 2 send halt instruction to power circuit 4, and power circuit 4 is stopped;
Step 204, control circuit 2 postpone a period of time, and for example 100ms, sends open command to relay 5, and control relay 5 disconnects;
Step 205, power circuit 4 stop.
The in the situation that of frequent starting, by DCDC power protecting circuit, the startup of the power circuit of whole electric automobile and shutdown process are all carried out above-mentioned process, effectively the impact of surge current suppression.
To sum up; the utility model is improved for the defect of above-mentioned conventional DCDC power supply; the DCDC power protecting circuit of electric automobile comprises the resistance R of surge current suppression, anti-reverse protection diode D, relay K and control circuit etc.; to input voltage sampling and switching on and shutting down instruction process, relay is sent to corresponding control command.By the control to relay, realize and suppress surge and anti-reverse protection.
The above-mentioned description for embodiment is for understanding and the application of those skilled in the art for this patent, those of ordinary skill in the art obviously can more easily make various modifications for example, and General Principle described herein are applied in other example and needn't pass through creative work.Therefore, this patent is not limited to the embodiment here, and those skilled in the art, according to the announcement of this patent, can obtain more embodiment, will not enumerate here.
Claims (8)
1. a DCDC power protecting circuit for electric automobile, is characterized in that, comprising: diode, resistance, electric capacity, relay and control circuit;
This diode is connected with this resistance, this diode is connected respectively power circuit input and power output end with the two ends of the series circuit of this resistance, this diode is in parallel with this relay with the series circuit of this resistance, the two ends of this relay connect respectively power circuit input and power output end, this electric capacity is in parallel with the input of this power circuit, and be connected with series circuit and this relay of this resistance with this diode, this control circuit connects this power circuit control end and this Control end;
Wherein, this control circuit is sampled to the voltage of this electric capacity, and according to an external command and sampled result, controls the break-make of this relay.
2. protective circuit as claimed in claim 1, is characterized in that, the anode of this diode is connected with this power output end.
3. protective circuit as claimed in claim 1; it is characterized in that; as being appointed as start-up command in this outside that this control circuit is received; this control circuit is sampled to the voltage of this electric capacity; the voltage that this control circuit detects this electric capacity of sampling reaches a threshold voltage; this control circuit sends adhesive instruction to this relay, and after this relay adhesive, this control circuit sends enabled instruction to this power circuit.
4. protective circuit as claimed in claim 3, is characterized in that, this control circuit sends after adhesive instruction this relay, postpones 100mS and sends enabled instruction to this power circuit.
5. protective circuit as claimed in claim 1, is characterized in that, this control circuit receives after shutdown command, to this power circuit, sends halt instruction, and after this power circuit stops, this control circuit sends open command to this relay.
6. protective circuit as claimed in claim 5, is characterized in that, this control circuit sends after halt instruction to this power circuit, postpones 100ms and sends open command to this relay.
7. protective circuit as claimed in claim 1; it is characterized in that; the negative terminal of this power supply connects the negative input end of this power circuit; the anode of this power supply connects one end of series circuit and one end of this relay of this diode and this resistance; the positive input terminal of this power circuit connects the other end of series circuit and the other end of this relay of this diode and this resistance, and the two ends of this electric capacity connect respectively the positive-negative input end of this power circuit.
8. protective circuit as claimed in claim 1, is characterized in that, the control signal output of this control circuit connects the control signal input of this power circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420390284.5U CN203967966U (en) | 2014-07-15 | 2014-07-15 | The DCDC power protecting circuit of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420390284.5U CN203967966U (en) | 2014-07-15 | 2014-07-15 | The DCDC power protecting circuit of electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203967966U true CN203967966U (en) | 2014-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420390284.5U Expired - Fee Related CN203967966U (en) | 2014-07-15 | 2014-07-15 | The DCDC power protecting circuit of electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203967966U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092362A (en) * | 2014-07-15 | 2014-10-08 | 中国兵器工业第二0八研究所 | DCDC power supply protection circuit of electric automobile |
| CN112019013A (en) * | 2020-09-01 | 2020-12-01 | 北京理工华创电动车技术有限公司 | High-power DCDC anti-impact reverse-connection-prevention slow starting circuit and control method |
-
2014
- 2014-07-15 CN CN201420390284.5U patent/CN203967966U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092362A (en) * | 2014-07-15 | 2014-10-08 | 中国兵器工业第二0八研究所 | DCDC power supply protection circuit of electric automobile |
| CN112019013A (en) * | 2020-09-01 | 2020-12-01 | 北京理工华创电动车技术有限公司 | High-power DCDC anti-impact reverse-connection-prevention slow starting circuit and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141126 Termination date: 20160715 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |