CN102673402A - High-voltage protective system of electric automobile - Google Patents
High-voltage protective system of electric automobile Download PDFInfo
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- CN102673402A CN102673402A CN2012101666398A CN201210166639A CN102673402A CN 102673402 A CN102673402 A CN 102673402A CN 2012101666398 A CN2012101666398 A CN 2012101666398A CN 201210166639 A CN201210166639 A CN 201210166639A CN 102673402 A CN102673402 A CN 102673402A
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Abstract
The invention provides a high-voltage protective system of an electric automobile. The high-voltage protective system of the electric automobile comprises a whole automobile electronic control unit (ECU), a battery pack, a motor, a compressor, a heating resistor, a high-voltage management ECU and relays, wherein the port A of the output loop of the first relay is connected with the battery pack; the port B of the output loop of the first relay is connected with the motor; the output loop of the second relay is connected with the compressor and the port B of the output loop of the first relay; and the output loop of the third relay is connected with the heating resistor and the port B of the output loop of the first relay. In the high-voltage protective system of the electric automobile, the main power does not need to be cut off directly when any high-voltage system is in failure; when the common high-voltage power system is in failure, the failure system is subjected to high-voltage power supply cut-off and normal work of other high-voltage systems is not influenced; and the main power is cut off only when a motor driving system is in failure. The high-voltage system is protected by the relays and the relays are not damaged, so the high-voltage protective system of the electric automobile is convenient to use as compared with the fuse adopted by the traditional method.
Description
Technical field
The present invention relates to the high voltage protective technical field, particularly a kind of electronlmobil high voltage protective system.
Background technology
At present; Drive motor, electric machine controller, air-conditioning compressor and PTC heating resistor etc. that most of electronlmobils are equipped with all adopt high voltage power battery-powered; Electronlmobil in the process of moving; The sudden short circuit fault of any high pressure using electricity system all might cause Danger Electric shock risk to chaufeur or passenger; And the vehicle high-pressure system is caused damage even burning, therefore, become relay electrical automobile tradition three big core systems another greatly independently important system afterwards gradually to the research of the safety guard-safeguard strategy of electronlmobil high pressure using electricity system.
The design of high pressure using electricity system safety guard-safeguard strategy should meet the safety guard-safeguard to people and vehicle, also will consider the running condition that vehicle is actual simultaneously.The conventional electric automobile is when carrying out the high voltage protective system design; As long as wherein certain high pressure using electricity system occurs cutting off main power source immediately to guarantee member and vehicle safety after the fault such as short circuit; Though this protection strategy can maximized completion high voltage protective function; But but ignored the problem that the power supply of other high-pressure systems is interrupted simultaneously of whether being necessary; In proper working order such as other high pressure using electricity systems of electronlmobil, have only compressor to break down, current sensor shows that compressor current increases several times even tens of times suddenly; The design of safety guard-safeguard strategy can be interrupted the high voltage supply of compressor fully, and does not influence other high pressure using electricity system normal operation such as motor and controller.In addition, traditional approach adopts fuse that high-pressure system is protected, and after high-pressure system breaks down, plays the safety guard-safeguard effect though fuse fuses immediately, vehicle is worked on must change a new fuse again, and work is loaded down with trivial details concerning the car owner.
Summary of the invention
The present invention is intended to solve at least the technical matters that exists in the prior art, has proposed to special innovation a kind of electronlmobil high voltage protective system.
In order to realize above-mentioned purpose of the present invention; The invention provides a kind of electronlmobil high voltage protective system; Comprise car load ECU, battery pack, motor, compressor and heating resistor, it also comprises high pressure management ECU, and the signal input end of said high pressure management ECU links to each other with car load ECU; Said high pressure management ECU has first sensor signal input part, the second sensor signal input end and the 3rd sensor signal input end; Said first sensor signal input part links to each other with motor current sensor; The said second sensor signal input end links to each other with the compressor current sensor, and said the 3rd sensor signal input end links to each other with the heating resistor current sensor; Said high pressure management ECU has first signal output part, secondary signal mouth and the 3rd signal output part; Said first signal output part links to each other with the input circuit of first relay; Said secondary signal mouth links to each other with the input circuit of second relay; Said the 3rd signal output part links to each other with the input circuit of the 3rd relay; The A port of the output loop of said first relay connects battery pack; The B port of the output loop of said first relay connects motor; The output loop of said second relay connects the B port of the compressor and the first relay output loop, and the output loop of said the 3rd relay connects the B port of the output loop of the heating resistor and first relay, and said high pressure management ECU realizes the break-make of the high voltage supply of motor, compressor and heating resistor through the break-make of the output loop of first relay, second relay and the 3rd relay.
Electronlmobil high voltage protective of the present invention system just directly cuts off general supply as long as any high-pressure system is out of order; Cut off but after the general high voltage using electricity system is out of order, only this failure system is carried out high voltage supply, do not influence the normal operation of other high-pressure systems; Have only and when motor driven systems is out of order, just cut off general supply.The present invention adopts relay that high-pressure system is protected, and the disconnection of relay and adhesive are mainly triggered by the output voltage of the relevant pin of high pressure ECU, and relay itself can not damage, and compares with the fuse that traditional approach adopts, and uses convenient.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize through practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage obviously with are easily understood becoming the description of embodiment from combining figs, wherein:
Fig. 1 is the structural representation of electronlmobil high voltage protective of the present invention system;
Fig. 2 is the workflow diagram of electronlmobil high voltage protective of the present invention system.
The specific embodiment
Describe embodiments of the invention below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention; It will be appreciated that; Term " vertically ", " laterally ", " on ", the orientation of indications such as D score, " preceding ", " back ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward " or position relation be for based on orientation shown in the drawings or position relation; Only be to describe with simplifying for the ease of describing the present invention; Rather than the device or the element of indication or hint indication must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In description of the invention, unless otherwise prescribed and limit, need to prove; Term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be mechanical connection or electrical connection; Also can be the connection of two element internals, can be directly to link to each other, and also can link to each other indirectly through intermediary; For those of ordinary skill in the art, can understand the concrete implication of above-mentioned term as the case may be.
Fig. 1 is the structural representation of electronlmobil high voltage protective of the present invention system; Visible from figure; This electronlmobil high voltage protective system comprises car load ECU, battery pack, motor, compressor and heating resistor; This electronlmobil high voltage protective system also comprises high pressure management ECU, and its signal input end links to each other with car load ECU.This high pressure management ECU has first sensor signal input part, the second sensor signal input end and the 3rd sensor signal input end; The first sensor signal input part links to each other with motor current sensor; The second sensor signal input end links to each other with the compressor current sensor, and the 3rd sensor signal input end links to each other with the heating resistor current sensor.This high pressure management ECU also has first signal output part, secondary signal mouth and the 3rd signal output part; First signal output part links to each other with the input circuit of first relay; The secondary signal mouth links to each other with the input circuit of second relay; The 3rd signal output part links to each other with the input circuit of the 3rd relay; The A port of the output loop of first relay connects battery pack, and the B port of the output loop of first relay connects motor, and the output loop of second relay connects the B port of the compressor and the first relay output loop; The output loop of the 3rd relay connects the B port of the output loop of the heating resistor and first relay, and high pressure management ECU realizes the break-make of the high voltage supply of motor, compressor and heating resistor through the break-make of the output loop of first relay, second relay and the 3rd relay.
In this embodiment; The model of car load ECU is MC9S12XEP100; The model of high pressure management ECU is that 16 of S12C series is micro controller system, and the control that first signal output part, secondary signal mouth and the 3rd signal output part of high pressure management ECU receives internal clock signal is output signal sequentially, when first signal output part, secondary signal mouth and the 3rd signal output part of high pressure management ECU all need output signal; First signal output part is output signal at first; Then, the secondary signal mouth is output signal again, the 3rd signal output part final output signal.
In this embodiment, this electronlmobil high voltage protective system also comprises display instrument, and this display instrument links to each other with high pressure management ECU through the CAN communication line, is used to show the mode of operation of motor, compressor and heating resistor.
In Fig. 1, the pin 1 of high pressure management ECU is a signal input end, and the incoming signal of this pin 1 is the switching value signal, is 0V or 12V; And 12V is effective, and the pin 2 of high pressure management ECU and pin 3 are connected the negative electrode and the anode of external source respectively, in this embodiment, and the external source of employing 12V; The pin 4 of high pressure management ECU links to each other with display instrument through the CAN bus with pin 5, and the pin 8 of high pressure management ECU is the first sensor signal input part, and pin 7 is the second sensor signal input end; Pin 6 is the 3rd sensor signal input end, this pin 8, pin 7; The incoming signal of pin 6 is the switching value signal, be 0V or 12V, and 12V is effective.Pin 11 is first signal output part, and pin 10 is the secondary signal mouth, and pin 9 is the 3rd signal output part, this pin 11, and pin 10, the output signal of pin 9 is the switching value signal, be 0V or 12V, and 12V is effective.
The pin 1 of high pressure management ECU links to each other with car load ECU; The incoming signal of car load ECU is the key signal; Key has three states of ACC/ON/START, and the input voltage of high pressure management ECU pin 1 is 0V during two states of ACC/ON, and the input voltage of high pressure management ECU pin 1 is 12V during the START state.
When car load ECU input 0V; Be that high pressure management ECU pin 1 gets electric 0V, pin 11, pin 10, the pin 9 of high pressure management ECU send 0V voltage successively, i.e. the pin 11 of high pressure management ECU at first sends out 0V voltage; Then; The pin 10 of the high pressure management ECU 0V voltage of redispatching out, last, the pin 9 of high pressure management ECU sends out 0V voltage.The output loop of first relay, second relay, the 3rd relay is in off-state respectively, and motor, compressor and heating resistor can not be connected the high-tension current that battery pack provides, all cisco unity malfunction.
When car load ECU input 12V; The pin 1 that is high pressure management ECU gets electric 12V; The pin 11 of high pressure management ECU, pin 10, pin 9 send the 12V electricity successively, the input circuit two ends of first relay, second relay and the 3rd relay all produce the voltage of 12V, the equal adhesive of output loop of first relay, second relay and the 3rd relay; Then motor, compressor and heating resistor are connected the high-tension current that battery pack provides respectively, but and normal operation.
Adhesive and motor be in the course of the work respectively when the output loop of first relay, second relay and the 3rd relay; When motor current sensor detects electric current greater than the electric motor protecting electric current; The pin 8 input 12V voltages of high pressure management ECU, then high pressure management ECU pin 11 sends 0V voltage immediately, and the output loop of first relay breaks off; Cut off the battery pack main circuit power, all high pressure using electricity systems all can not be worked; When motor current sensor detects electric current less than protection current, high pressure management ECU pin 8 input 0V voltages, then high pressure management ECU pin 11 sends 12V voltage, the output loop adhesive of first relay, motor works on.
Adhesive and compressor be in the course of the work respectively when the output loop of first relay, second relay and the 3rd relay; When the compressor current sensor arrives electric current greater than the compressor protection electric current; The pin 7 input 12V voltages of high pressure management ECU, then high pressure management ECU pin 10 sends 0V voltage immediately, and the output loop of second relay breaks off; The compressor high-tension current is cut off, but other high pressure using electricity systems normal operation still; When the compressor current sensor arrives electric current less than protection current, high pressure management ECU pin 7 input 0V voltages, then high pressure management ECU pin 10 sends 12V voltage, the output loop adhesive of second relay, compressor works on.
Adhesive and heating resistor be in the course of the work respectively when the output loop of first relay, second relay and the 3rd relay; When the heating resistor current sensor senses arrives electric current greater than the heating resistor protection current; The pin 6 input 12V voltages of high pressure management ECU, then the pin 9 of high pressure management ECU sends 0V voltage immediately, and the output loop of the 3rd relay breaks off; The high-tension current of heating resistor is cut off, but other high pressure using electricity systems normal operation still; When the heating resistor current sensor senses arrives electric current less than protection current, high pressure management ECU pin 6 input 0V voltages, then the pin 9 of high pressure management ECU still sends 12V voltage, and the output loop of the 3rd relay breaks off adhesive, and heating resistor works on.
In this embodiment, when motor was not worked, whether motor connected high-tension current only by a pin 1 decision of high pressure management ECU, when pin 1 sends 12V voltage, and the then output loop adhesive of first relay, motor is connected high-tension current; When machine operation, whether motor connects high-tension current determine by pin 1 and the pin 8 of high pressure management ECU jointly, but is preferentially determined by pin 8; When pin 1 sends 12V voltage; If pin 8 sends 0V voltage, the first relay output loop breaks off, and motor breaks off high-tension current.
The same with the logic strategy of motor, when compressor was not worked, whether compressor connected high-tension current only by pin 1 decision of high pressure management ECU, but during compressor operating, mainly by high pressure management EUC pin 1 and pin 7 decisions, but preferentially by pin 7 decisions.
Equally, when heating resistor was not worked, whether heating resistor connected high-tension current only by a pin 1 decision of high pressure management ECU, but during compressor operating, mainly by high pressure management EUC pin 1 and pin 6 decisions, but preferentially by pin 6 decisions.
Fig. 2 is the workflow diagram of electronlmobil high voltage protective of the present invention system; Visible from figure; Motor current sensor detects current of electric and is transferred to the pin 8 of high pressure management ECU; Compressor current sensor compressor current also is transferred to the pin 7 that high pressure is managed ECU, and heating resistor current sensor senses heating resistor electric current also is transferred to the pin 6 of high pressure management ECU.When current of electric during greater than the electric motor protecting electric current, the output loop of first relay breaks off, the cut off high power supply, and all high pressure using electricity systems all can not be worked; When compressor current during greater than the compressor protection electric current, the output loop of second relay breaks off, and the high voltage supply of compressor cuts off, and motor and heating resistor still can be worked; When the electric current of heating resistor during greater than the heating resistor protection current, the output loop of the 3rd relay breaks off, and the high voltage supply of heating resistor cuts off, and motor and compressor still can be worked.When the electric current of all high pressure using electricity systems all is less than or equal to the cooresponding protection current of each system, the equal adhesive of the output loop of all relays, but the equal normal operation of all high-pressure systems.
The present invention considers that from demand two aspects of high-pressure security protection and the actual use of vehicle with two ranks of protection class of high pressure using electricity system, i.e. the protection of motor driven systems belongs to one-level, and the protection of compressor and heating resistor belongs to secondary.Electric current such as short circuit occurring when the first class of protection system increases situation suddenly, should cut off the battery pack main power source immediately, all high pressure consumers outages; When first class of protection system trouble free, and situation such as electric current increase suddenly such as short circuit appear in the second class protection system, cut off the second class protection system that breaks down, but guarantee first class of protection service system normal operation.
In the description of this specification sheets, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means the concrete characteristic, structure, material or the characteristics that combine this embodiment or example to describe and is contained at least one embodiment of the present invention or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete characteristic, structure, material or the characteristics of description can combine with suitable manner in any one or more embodiment or example.
Although illustrated and described embodiments of the invention; Those having ordinary skill in the art will appreciate that: under the situation that does not break away from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited claim and equivalent thereof.
Claims (6)
1. an electronlmobil high voltage protective system comprises car load ECU, battery pack, motor, compressor and heating resistor, it is characterized in that: also comprise high pressure management ECU, the signal input end of said high pressure management ECU links to each other with car load ECU;
Said high pressure management ECU has first sensor signal input part, the second sensor signal input end and the 3rd sensor signal input end; Said first sensor signal input part links to each other with motor current sensor; The said second sensor signal input end links to each other with the compressor current sensor, and said the 3rd sensor signal input end links to each other with the heating resistor current sensor;
Said high pressure management ECU has first signal output part, secondary signal mouth and the 3rd signal output part; Said first signal output part links to each other with the input circuit of first relay; Said secondary signal mouth links to each other with the input circuit of second relay; Said the 3rd signal output part links to each other with the input circuit of the 3rd relay; The A port of the output loop of said first relay connects battery pack; The B port of the output loop of said first relay connects motor; The output loop of said second relay connects the B port of the compressor and the first relay output loop, and the output loop of said the 3rd relay connects the B port of the output loop of the heating resistor and first relay, and said high pressure management ECU realizes the break-make of the high voltage supply of motor, compressor and heating resistor through the break-make of the output loop of first relay, second relay and the 3rd relay.
2. electronlmobil high voltage protective as claimed in claim 1 system; It is characterized in that: the control that first signal output part, secondary signal mouth and the 3rd signal output part of said high pressure management ECU receives internal clock signal is output signal sequentially; When first signal output part, secondary signal mouth and the 3rd signal output part of said high pressure management ECU all need output signal; Said first signal output part is output signal at first; Then, the secondary signal mouth is output signal again, said the 3rd signal output part final output signal.
3. according to claim 1 or claim 2 electronlmobil high voltage protective system, it is characterized in that: the model of said high pressure management ECU is S12C.
4. electronlmobil high voltage protective as claimed in claim 1 system, it is characterized in that: the model of said car load ECU is MC9S12XEP100.
5. electronlmobil high voltage protective as claimed in claim 1 system is characterized in that: also comprise display instrument, said display instrument links to each other with high pressure management ECU, is used to show the mode of operation of motor, compressor and heating resistor.
6. electronlmobil high voltage protective as claimed in claim 5 system is characterized in that: said display instrument links to each other through CAN communication line and high pressure management ECU.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210166639.8A CN102673402B (en) | 2012-05-25 | 2012-05-25 | High-voltage protective system of electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210166639.8A CN102673402B (en) | 2012-05-25 | 2012-05-25 | High-voltage protective system of electric automobile |
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| CN102673402A true CN102673402A (en) | 2012-09-19 |
| CN102673402B CN102673402B (en) | 2014-10-29 |
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| CN201210166639.8A Expired - Fee Related CN102673402B (en) | 2012-05-25 | 2012-05-25 | High-voltage protective system of electric automobile |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103568846A (en) * | 2013-10-30 | 2014-02-12 | 力帆实业(集团)股份有限公司 | High-voltage protection system and method for electric vehicle |
| CN103587420A (en) * | 2013-10-30 | 2014-02-19 | 三一重机有限公司 | Anti-impact electric system and engineering machine |
| CN109556231A (en) * | 2018-10-26 | 2019-04-02 | 珠海格力电器股份有限公司 | A kind of unit and its high voltage protective method |
| CN109696621A (en) * | 2017-10-20 | 2019-04-30 | 河南森源重工有限公司 | A kind of electric vehicle and its high voltage supply system and fault detection method |
| CN113970914A (en) * | 2021-09-29 | 2022-01-25 | 徐工集团工程机械股份有限公司科技分公司 | Loader power supply comprehensive management system and method |
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| CN113970914A (en) * | 2021-09-29 | 2022-01-25 | 徐工集团工程机械股份有限公司科技分公司 | Loader power supply comprehensive management system and method |
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| CN102673402B (en) | 2014-10-29 |
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Address after: 400037 Chongqing city Beibei District caijiagang Zhen Tong Xing Industrial Park Fengqi Road No. 16 Patentee after: Lifan Industry (Group) Co., Ltd. Address before: 400037 Chongqing District of Shapingba city on 60 Zhangjiawan Bridge Patentee before: Lifan Industry (Group) Co., Ltd. |
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Granted publication date: 20141029 Termination date: 20210525 |