CN205523722U - A high pressure leakage protection circuit for electric automobile - Google Patents
A high pressure leakage protection circuit for electric automobile Download PDFInfo
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- CN205523722U CN205523722U CN201620336673.9U CN201620336673U CN205523722U CN 205523722 U CN205523722 U CN 205523722U CN 201620336673 U CN201620336673 U CN 201620336673U CN 205523722 U CN205523722 U CN 205523722U
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- electric automobile
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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Abstract
The utility model relates to a high pressure leakage protection circuit for electric automobile compares with prior art and has solved the high -pressure defect of revealing the protection and can't satisfying electric automobile use needs. The utility model discloses middle and high voltage detection module's input links to each other with the output by the monitoring subassembly, high pressure detection module's detection signal output part links to each other with the detection signal input part of FPGA module, the control signal output of FPGA module links to each other with the signal input part of high -pressure protective film piece, the CAN communication interface of FPGA module links to each other with communication module's CAN communication interface, does high pressure protective film piece concatenate at automobile body high voltage power supply and DC on DC power module's the transmission circuit. The utility model discloses can in time effectually detect the high pressure leaks to quick execute protection scheme when detecting high pressure leakage harm.
Description
Technical field
This utility model relates to high tension protection circuit technical field, a kind of high-pressure leakage protection circuit for electric automobile.
Background technology
At present for the most old a lot of shortcomings of security consideration of electric automobile, much it is also based on the safety approach of conventional fuel oil car design, does not combine the safety approach that some exclusive characteristics design of electric automobile are new.The particularly power resources of electric automobile use the battery of high-tension battery drive scheme, its voltage is generally higher than 200V, for using the electric motor car of high drive, high pressure is exactly a kind of new exclusive characteristic, tackle this characteristic to take in, once occur that high-pressure leakage will cause serious safety hazard or cause device damage.Especially because the design of car inner structure is intensive, during vehicle life-time service, original high voltage electrical isolation layer be likely to be due to screw come off, the many reasons such as insulating barrier disappearance, when resulting in high-pressure leakage, high-tension electricity is transmitted by between body fuselage, the transmission of the most non-primary circuit connected mode.This kind of high pressure is revealed extremely hazardous, it is most likely that driver is caused mortal injury.
The most effective high-pressure leakage protection scheme, only scheme being also based on detecting wire tension, use the response of this scheme system slower.Because when wire tension being detected, high pressure harm has created, and at this moment system the most just starts high-pressure leakage to be detected, adds system response time and operating time of protection, and such scheme protective capability is limited.And traditional high voltage protective scheme is only individually to excise high pressure, making equipment not work, can not notify that car load or other system there occurs high-pressure leakage fault timely and effectively, the high pressure monitoring not being suitable for electric automobile uses.Therefore, how to develop a kind of high pressure leakage monitoring device for electric automobile to have become as urgent need and solve the technical problem that.
Utility model content
The purpose of this utility model is the defect that cannot meet electric automobile use needs in order to solve the leakage protection of prior art mesohigh, it is provided that a kind of high-pressure leakage protection circuit for electric automobile solves the problems referred to above.
To achieve these goals, the technical solution of the utility model is as follows:
A kind of high-pressure leakage protection circuit for electric automobile, including monitored assembly, DC-DC power module, communication module and FPGA module, the outfan of car body high voltage power supply is connected with the input of DC-DC power module,
Also include high pressure detection module and high voltage protective module; the input of described high pressure detection module is connected with the outfan of monitored assembly; the detection signal output part of high pressure detection module is connected with the detection signal input part of FPGA module; the control signal outfan of FPGA module is connected with the control signal input of high voltage protective module; the CAN communication interface of FPGA module is connected with the CAN communication interface of communication module, and high voltage protective module is serially connected on the transmission circuit of car body high voltage power supply and DC-DC power module.
Described high pressure detection module includes storage capacitor C1 and stabilivolt D1, monitored assembly is sequentially connected in series storage capacitor C1, ground connection after divider resistance R4 and divider resistance R5, the negative pole of stabilivolt D1 is attempted by between divider resistance R4 and divider resistance R5, the plus earth of stabilivolt D1, the anode of optocoupler U1 is attempted by between divider resistance R4 and divider resistance R5, the negative electrode of optocoupler U1 passes through pull down resistor R6 ground connection, the colelctor electrode of optocoupler U1 meets power supply positive pole+OUT, the emitter stage of optocoupler U1 connects with the detection signal input part of FPGA module, one end of pull down resistor R7 is attempted by the emitter stage of optocoupler U1, the other end ground connection of pull down resistor R7.
Described high voltage protective module includes audion Q1 and insulated gate bipolar transistor Q2; the control signal outfan series resistor R1 of FPGA module is followed by the base stage of audion Q1; one end of resistance R2 is connected on the colelctor electrode of audion Q1; another termination power supply positive pole+OUT of resistance R2; the emitter stage of audion Q1 passes through resistance R3 ground connection; the canopy pole of insulated gate bipolar transistor Q2 is attempted by the emitter stage of audion Q1, and the collector and emitter of insulated gate bipolar transistor Q2 is serially connected on the positive pole transmission circuit of car body high voltage power supply and DC-DC power module.
The power source supply end of the power source supply end of described high pressure detection module, the power source supply end of high voltage protective module and communication module is all attempted by DC-DC power module.
Also including that DC-DC spare module, the input of DC-DC spare module are attempted by between monitored assembly and storage capacitor C1, the outfan of DC-DC spare module is attempted by the power source supply end of communication module and the power source supply end of FPGA module respectively.
Beneficial effect
A kind of high-pressure leakage protection circuit for electric automobile of the present utility model; high-pressure leakage compared with prior art can be detected timely and effectively; and quickly perform protection scheme detecting when high-pressure leakage endangers, the harm reducing, avoiding high-pressure leakage to bring.This utility model achieves quickly detection and the protection of high-pressure leakage, can protect the person and equipment safety when high-pressure leakage in time, enhance the stability of system, reduce system bulk.There is feature quick, safe and reliable, that volume is little.
Accompanying drawing explanation
Fig. 1 is circuit connection structure block diagram of the present utility model；
Fig. 2 is the circuit connection diagram of this utility model mesohigh protection module；
Fig. 3 is the circuit connection diagram of this utility model mesohigh detection module；
Fig. 4 is the flow chart of control method involved by this utility model；
Wherein, 1-high pressure detection module, 2-high voltage protective module, 3-DC-DC spare module, 4-DC-DC power module, 5-communication module, 6-FPGA module, the monitored assembly of 7-, 8-car body high voltage power supply.
Detailed description of the invention
By making, architectural feature of the present utility model and effect of being reached are had a better understanding and awareness, coordinate detailed description in order to preferred embodiment and accompanying drawing, be described as follows:
As shown in Figure 1; a kind of high-pressure leakage protection circuit for electric automobile described in the utility model; including monitored assembly 7, DC-DC power module 4, communication module 5 and FPGA module 6; monitored assembly 7 is the parts needing to carry out high-pressure leakage protection in actual application; controller such as electric automobile, naturally it is also possible to for other critical components.DC-DC power module 4 is the electric supply installation of protection circuit and monitored assembly 7; power supply supply is provided for it; the DC-DC power module 4 then car body high voltage power supply 8 from electric automobile receives electricity; the i.e. outfan of car body high voltage power supply 8 is connected with the input of DC-DC power module 4; by disconnecting the power path between DC-DC power module 4 and car body high voltage power supply 8, the high-tension electricity output of car load can be disconnected.Communication module 5 and FPGA module 6 are conventional module of the prior art, and communication module is for externally sending warning message, and FPGA module 6 is used for carrying out high pressure duration threshold contrast, to determine whether electric automobile produces high-pressure leakage.
High pressure detection module 1 is used for carrying out high pressure detection, and high voltage protective module 2 is for disconnecting high-tension electricity, protection electronic devices and components and the safety of driver and crew under there is high-pressure situations.The input of high pressure detection module 1 is connected with the outfan of monitored assembly 7, and the electric quantity data of monitored assembly 7 is directly passed to high pressure detection module 1.The detection signal output part of high pressure detection module 1 is connected with the detection signal input part of FPGA module 6, in order to prevent high-pressure electrostatic false alarm, the high-voltage signal that high pressure detection module 1 detects is issued FPGA module 6 and is carried out the contrast of high-pressure leakage time, if high pressure persistently produces the time and exceedes the threshold time in FPGA module 6, then illustrate that current high-pressure leakage is actual leakage；If high pressure persistently produces the time less than the threshold time in FPGA module 6, then illustrate that current high-pressure leakage is high-pressure electrostatic, it is not necessary to alert process.
As it is shown on figure 3, high pressure detection module 1 includes that storage capacitor C1 and stabilivolt D1, storage capacitor C1 are used for storing electricity, it is powered can also under powering-off state DC-DC spare module 3.Monitored assembly 7 is sequentially connected in series ground connection after storage capacitor C1, divider resistance R4 and divider resistance R5, the negative pole of stabilivolt D1 is attempted by between divider resistance R4 and divider resistance R5, the plus earth of stabilivolt D1, stabilivolt D1 is for when running into high-pressure leakage situation, the high pressure accepted from monitored assembly 7 on high pressure detection module 1 in the variation tendency slowly risen, when preventing monitored assembly 7 by high-pressure leakage, voltage steeply rises, and breaks the appearance of other components and parts situations.The anode of optocoupler U1 is attempted by between divider resistance R4 and divider resistance R5, and the voltage (high pressure) that monitored assembly 7 spreads out of reaches optocoupler U1 after divider resistance R4 and divider resistance R5 carries out dividing potential drop by its corresponding resistance value.The negative electrode of optocoupler U1 passes through pull down resistor R6 ground connection, and the colelctor electrode of optocoupler U1 meets power supply positive pole+OUT, and one end of pull down resistor R7 is attempted by the emitter stage of optocoupler U1, the other end ground connection of pull down resistor R7.The emitter stage of optocoupler U1 connects with the detection signal input part of FPGA module 6, when monitored assembly 7 power on positive pressure normal time, optocoupler U1 is not turned on, and optocoupler U1 does not sends signal to FPGA module 6；When on monitored assembly 7, voltage exceedes normal value, optocoupler U1 turns on, and optocoupler U1 does not sends high level signal to FPGA module 6, until FPGA module 6 carry out the high pressure persistent period examine after determine whether again to carry out to trigger high voltage protective module 2.
The control signal outfan of FPGA module 6 is connected with the control signal input of high voltage protective module 2; the CAN communication interface of FPGA module 6 is connected with the CAN communication interface of communication module 5; when FPGA module 6 is monitored after the high pressure persistent period exceedes its interior time threshold, then trigger high voltage protective module 2 and carry out circuit protection.High voltage protective module 2 is serially connected in car body high voltage power supply 8 with on the transmission circuit of DC-DC power module 4, disconnects the transmission circuit of car body high voltage power supply 8 and DC-DC power module 4, and triggers communication module 5 and externally report to the police.As in figure 2 it is shown, high voltage protective module 2 includes audion Q1 and insulated gate bipolar transistor Q2.The control signal outfan series resistor R1 of FPGA module 6 is followed by the base stage of audion Q1, and an end of resistance R2 is connected on the colelctor electrode of audion Q1, and another termination power supply positive pole+OUT of resistance R2, the emitter stage of audion Q1 passes through resistance R3 ground connection.The canopy pole of insulated gate bipolar transistor Q2 is attempted by the emitter stage of audion Q1, and the collector and emitter of insulated gate bipolar transistor Q2 is serially connected on the positive pole transmission circuit of car body high voltage power supply 8 and DC-DC power module 4.In normal state, when FPGA module 6 exports high level, audion Q1 turns on FPGA module 6, then audion Q1 also exports high level, now insulated gate bipolar transistor Q2 conducting, the power supply between car body high voltage power supply 8 with DC-DC power module 4 is connected conducting, and the running of whole equipment is normal.FPGA module 6 is under superpressure (high-pressure leakage) state, during FPGA module 6 output low level, audion Q1 ends, then audion Q1 also output low level, now insulated gate bipolar transistor Q2 cut-off, power supply between car body high voltage power supply 8 with DC-DC power module 4 is connected cut-off, and car body high voltage power supply 8 disconnects the high voltage supply to car load.
For the ease of the protection to other components and parts; the power source supply end of the power source supply end of high pressure detection module 1, the power source supply end of high voltage protective module 2 and communication module 5 is all attempted by DC-DC power module 4; when high-pressure leakage occurs, high pressure detection module 1, high voltage protective module 2 and communication module 5 self can be played a protective role.But while above components and parts are carried out power-off protection, communication module 5 or FPGA module 6 also power-off, it is impossible to guarantee the most externally to report to the police, therefore can also include DC-DC spare module 3 at this.The input of DC-DC spare module 3 is attempted by between monitored assembly 7 and storage capacitor C1, and the outfan of DC-DC spare module 3 is attempted by the power source supply end of communication module 5 and the power source supply end of FPGA module 6 respectively.When high-pressure leakage occurs, whole high voltage power supply is all off, the electricity supply DC-DC spare module 3 being now stored in storage capacitor C1, make to be powered to communication module 5 and FPGA module 6 under the DC-DC spare module 3 electric energy supply in a small amount of storage capacitor C1 so that warning message can externally export.
As shown in Figure 4, also provide for the control method of a kind of high-pressure leakage protection circuit for electric automobile at this, comprise the following steps:
The first step, high-pressure leakage is monitored.High pressure detection module 1 obtains the magnitude of voltage of monitored assembly 7 output in real time, changes into high pressure detection signal, and is transferred to FPGA module 6, determines whether high-pressure leakage truly for FPGA module 6.
Second step, threshold comparison.The persistent period receiving high pressure detection signal is contrasted by FPGA module 6 with the time threshold self preserved; if without departing from threshold value; the ofest short duration high pressure detection signal output simply electrostatic or other influences factor is then described; not high-pressure leakage, FPGA module 6 exports high level signal to high voltage protective module 2.Owing to FPGA module 6 exports high level signal to high voltage protective module 2, therefore high voltage protective module 2 is in the conduction state, and the power supply between car body high voltage power supply 8 and DC-DC power module 4 is in the conduction state.If beyond time threshold, then illustrating that current high pressure detection signal output is high-pressure leakage really, FPGA module 6, to high voltage protective module 2 output low level signal, triggers high voltage protective module 2 and carries out high pressure power-off insulation blocking.
3rd step, high-pressure leakage is protected.The audion Q1 of high voltage protective module 2 receives FPGA module 6 and transmits the low level signal of coming; audion Q1 open circuit causes insulated gate bipolar transistor Q2 open circuit; being disconnected by the positive pole transmission circuit of car body high voltage power supply 8 with DC-DC power module 4, now car load power supply disconnects.
4th step, the warning of leakage information.DC-DC spare module 3 obtains the storing electricity in storage capacitor C1, and power supply is supplied communication module 5 and FPGA module 6 by DC-DC spare module 3, and FPGA module 6 controls communication module 5 alert, it is provided that high-pressure leakage currently occurs in user.
Of the present utility model ultimate principle, principal character and of the present utility model advantage have more than been shown and described.Skilled person will appreciate that of the industry; this utility model is not restricted to the described embodiments; simply principle of the present utility model described in above-described embodiment and description; on the premise of without departing from this utility model spirit and scope, this utility model also has various changes and modifications, and these changes and improvements both fall within the range of claimed this utility model.The protection domain that this utility model requires is defined by appending claims and equivalent thereof.
Claims (5)
1. the high-pressure leakage protection circuit for electric automobile; including monitored assembly (7), DC-DC power module (4), communication module (5) and FPGA module (6); the outfan of car body high voltage power supply (8) is connected with the input of DC-DC power module (4)
It is characterized in that: also include high pressure detection module (1) and high voltage protective module (2), the input of described high pressure detection module (1) is connected with the outfan of monitored assembly (7), the detection signal output part of high pressure detection module (1) is connected with the detection signal input part of FPGA module (6), the control signal outfan of FPGA module (6) is connected with the control signal input of high voltage protective module (2), the CAN communication interface of FPGA module (6) is connected with the CAN communication interface of communication module (5), high voltage protective module (2) is serially connected on the transmission circuit of car body high voltage power supply (8) and DC-DC power module (4).
nullA kind of high-pressure leakage protection circuit for electric automobile the most according to claim 1，It is characterized in that: described high pressure detection module (1) includes storage capacitor C1 and stabilivolt D1，Monitored assembly (7) is sequentially connected in series storage capacitor C1、Ground connection after divider resistance R4 and divider resistance R5，The negative pole of stabilivolt D1 is attempted by between divider resistance R4 and divider resistance R5，The plus earth of stabilivolt D1，The anode of optocoupler U1 is attempted by between divider resistance R4 and divider resistance R5，The negative electrode of optocoupler U1 passes through pull down resistor R6 ground connection，The colelctor electrode of optocoupler U1 meets power supply positive pole+OUT，The emitter stage of optocoupler U1 connects with the detection signal input part of FPGA module (6)，One end of pull down resistor R7 is attempted by the emitter stage of optocoupler U1，The other end ground connection of pull down resistor R7.
A kind of high-pressure leakage protection circuit for electric automobile the most according to claim 1, it is characterized in that: described high voltage protective module (2) includes audion Q1 and insulated gate bipolar transistor Q2, the control signal outfan series resistor R1 of FPGA module (6) is followed by the base stage of audion Q1, one end of resistance R2 is connected on the colelctor electrode of audion Q1, another termination power supply positive pole+OUT of resistance R2, the emitter stage of audion Q1 passes through resistance R3 ground connection, the canopy pole of insulated gate bipolar transistor Q2 is attempted by the emitter stage of audion Q1, the collector and emitter of insulated gate bipolar transistor Q2 is serially connected on the positive pole transmission circuit of car body high voltage power supply (8) and DC-DC power module (4).
A kind of high-pressure leakage protection circuit for electric automobile the most according to claim 1, it is characterised in that: the power source supply end of the power source supply end of described high pressure detection module (1), the power source supply end of high voltage protective module (2) and communication module (5) is all attempted by DC-DC power module (4).
A kind of high-pressure leakage protection circuit for electric automobile the most according to claim 2; it is characterized in that: also include DC-DC spare module (3); the input of DC-DC spare module (3) is attempted by between monitored assembly (7) and storage capacitor C1, and the outfan of DC-DC spare module (3) is attempted by the power source supply end of communication module (5) and the power source supply end of FPGA module (6) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620336673.9U CN205523722U (en) | 2016-04-20 | 2016-04-20 | A high pressure leakage protection circuit for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620336673.9U CN205523722U (en) | 2016-04-20 | 2016-04-20 | A high pressure leakage protection circuit for electric automobile |
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| Publication Number | Publication Date |
|---|---|
| CN205523722U true CN205523722U (en) | 2016-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620336673.9U Withdrawn - After Issue CN205523722U (en) | 2016-04-20 | 2016-04-20 | A high pressure leakage protection circuit for electric automobile |
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| Country | Link |
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| CN (1) | CN205523722U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105730244A (en) * | 2016-04-20 | 2016-07-06 | 合肥巨一动力系统有限公司 | High-voltage leakage protection circuit for electronic vehicle and control method of high-voltage leakage protection circuit |
-
2016
- 2016-04-20 CN CN201620336673.9U patent/CN205523722U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105730244A (en) * | 2016-04-20 | 2016-07-06 | 合肥巨一动力系统有限公司 | High-voltage leakage protection circuit for electronic vehicle and control method of high-voltage leakage protection circuit |
| CN105730244B (en) * | 2016-04-20 | 2017-11-07 | 合肥巨一动力系统有限公司 | A kind of high-pressure leakage protection circuit and its control method for electric automobile |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160831 Effective date of abandoning: 20171107 |