CN102673402B - High-voltage protective system of electric automobile - Google Patents
High-voltage protective system of electric automobile Download PDFInfo
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- CN102673402B CN102673402B CN201210166639.8A CN201210166639A CN102673402B CN 102673402 B CN102673402 B CN 102673402B CN 201210166639 A CN201210166639 A CN 201210166639A CN 102673402 B CN102673402 B CN 102673402B
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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 high voltage protective technical field, particularly a kind of electric automobile high-voltage protection 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 one high-voltage power system all likely causes Danger Electric shock risk to chaufeur or passenger; and may make vehicle high-pressure system cause damage even to burn; therefore, the research for the Security Techniques of electric automobile high-voltage using electricity system becomes relay electrical automobile tradition three large core systems another greatly independently important system afterwards gradually.
The design of high-voltage power system Security Techniques should meet the safety guard-safeguard to people and vehicle, also will consider the running condition of vehicle reality simultaneously.Conventional electric automobile is when carrying out high voltage protective system, as long as wherein certain high-voltage power system occurs cutting off immediately main power source to guarantee member and vehicle safety after the faults such as short circuit, although this protection strategy can maximizedly complete 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, such as other high-voltage power systems of electronlmobil are working properly, only have compressor to break down, current sensor shows that compressor current increases suddenly even decades of times of several times, the design of Security Techniques can be interrupted the high voltage supply of compressor completely, and do not affect other high-voltage power systems such as motor controller, normally do not work.In addition, traditional approach adopts fuse to protect high-pressure system, after high-pressure system breaks down, though fuse fuses immediately, plays safety guard-safeguard effect, make vehicle work on and must again change a new fuse, and concerning car owner, work is loaded down with trivial details.
Summary of the invention
The present invention is intended at least solve the technical matters existing in prior art, has proposed to special innovation a kind of electric automobile high-voltage protection system.
In order to realize above-mentioned purpose of the present invention, the invention provides a kind of electric automobile high-voltage protection system, comprise car load ECU, battery pack, motor, compressor and heating resistor, it also comprises high pressure management ECU, and the control signal input end of described high pressure management ECU is connected with car load ECU, described high pressure management ECU has first sensor signal input part, the second sensor signal input end and the 3rd sensor signal input end, described first sensor signal input part is connected with motor current sensor, described the second sensor signal input end is connected with compressor current sensor, and described the 3rd sensor signal input end is connected with heating resistor current sensor, described high pressure management ECU has first signal mouth, secondary signal mouth and the 3rd signal output part, described first signal mouth is connected with the input circuit of the first relay, described secondary signal mouth is connected with the input circuit of the second relay, described the 3rd signal output part is connected with the input circuit of the 3rd relay, the A port of the output loop of described the first relay connects battery pack, the B port of the output loop of described the first relay connects motor, the output loop of described the second relay connects the B port of compressor and the first relay output loop, the output loop of described the 3rd relay connects the B port of the output loop of heating resistor and the first relay, described high pressure management ECU is by the first relay, the break-make of the output loop of the second relay and the 3rd relay realizes motor, the break-make of the high voltage supply of compressor and heating resistor.
Electric automobile high-voltage protection system of the present invention is not just directly to cut off general supply as long as any high-pressure system is out of order, but only this failure system is carried out to high voltage supply cut-out after general high voltage using electricity system is out of order, do not affect the normal work of other high-pressure systems; Only have and when motor driven systems is out of order, just cut off general supply.The present invention adopts relay to protect high-pressure system, 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 in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination obviously and is easily understood becoming the description of embodiment, wherein:
Fig. 1 is the structural representation of electric automobile high-voltage protection system of the present invention;
Fig. 2 is the workflow diagram of electric automobile high-voltage protection system of the present invention.
The specific embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining 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 " longitudinally ", " laterally ", " on ", orientation or the position relationship of the indication such as D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward " be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than indicate or imply that the device of indication or element must have specific orientation, with specific orientation, construct and operation, therefore can not be interpreted as limitation of the present invention.
In description of the invention, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be to be directly connected, and also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
Fig. 1 is the structural representation of electric automobile high-voltage protection system of the present invention; as seen from the figure; this electric automobile high-voltage protection system comprises car load ECU, battery pack, motor, compressor and heating resistor; this electric automobile high-voltage protection system also comprises high pressure management ECU, and its control signal input end is connected 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, first sensor signal input part is connected with motor current sensor, the second sensor signal input end is connected with compressor current sensor, and the 3rd sensor signal input end is connected with heating resistor current sensor.This high pressure management ECU also has first signal mouth, secondary signal mouth and the 3rd signal output part, first signal mouth is connected with the input circuit of the first relay, secondary signal mouth is connected with the input circuit of the second relay, the 3rd signal output part is connected with the input circuit of the 3rd relay, the A port of the output loop of the first relay connects battery pack, the B port of the output loop of the first relay connects motor, the output loop of the second relay connects the B port of compressor and the first relay output loop, the output loop of the 3rd relay connects the B port of the output loop of heating resistor and the first relay, ECU is by the first relay in high pressure management, the break-make of the output loop of the second relay and the 3rd relay realizes motor, the break-make of the high voltage supply of compressor and heating resistor.
In the present 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, the first signal mouth of high pressure management ECU, the control that secondary signal mouth and the 3rd signal output part are subject to internal clock signal is output signal sequentially, first signal mouth as high pressure management ECU, when secondary signal mouth and the 3rd signal output part all need output signal, first signal mouth is output signal first, then, secondary signal mouth is output signal again, the 3rd signal output part final output signal.
In the present embodiment, this electric automobile high-voltage protection system also comprises display instrument, and this display instrument is connected with high pressure management ECU by CAN communication line, for showing the mode of operation of motor, compressor and heating resistor.
In Fig. 1, the pin 1 of high pressure management ECU is control signal input end, the incoming signal of this pin 1 is switching value signal, for 0V or 12V, and 12V is effective, the pin 2 of high pressure management ECU and pin 3 are connected respectively negative electrode and the anode of external source, in the present embodiment, adopt the external source of 12V, the pin 4 of high pressure management ECU is connected with display instrument by CAN bus with pin 5, the pin 8 of high pressure management ECU is first sensor signal input part, 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 switching value signal, be 0V or 12V, and 12V is effective.Pin 11 is first signal mouth, and pin 10 is 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 switching value signal, be 0V or 12V, and 12V is effective.
The pin 1 of high pressure management ECU is connected with car load ECU, the incoming signal of car load ECU is key signal, key has tri-states of ACC/ON/START, and during two states of ACC/ON, the input voltage of high pressure management ECU pin 1 is 0V, and during START state, the input voltage of high pressure management ECU pin 1 is 12V.
When car load ECU input 0V, be that high pressure management ECU pin 1 obtains electric 0V, pin 11, pin 10, the pin 9 of high pressure management ECU send 0V voltage successively, first the pin 11 that is high pressure management ECU sends out 0V voltage, then, the pin 10 of high pressure management ECU sends out 0V voltage again, last, and the pin 9 of high pressure management ECU sends out 0V voltage.The output loop of the first relay, the second relay, the 3rd relay is respectively in off-state, 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 obtains electric 12V, the pin 11 of high pressure management ECU, pin 10, pin 9 send successively 12V electricity, the input circuit two ends of the first relay, the second relay and the 3rd relay all produce the voltage of 12V, the equal adhesive of output loop of the first relay, the second relay and the 3rd relay, motor, compressor and heating resistor are connected respectively the high-tension current that battery pack provides, and can normally work.
When the output loop of the first relay, the second relay and the 3rd relay, adhesive and motor be in the course of the work respectively, when motor current sensor detects electric current and is greater than electric motor protecting electric current, the pin 8 input 12V voltages of high pressure management ECU, high pressure management ECU pin 11 sends 0V voltage immediately, the output loop of the first relay disconnects, cut off battery pack main circuit power, all high-voltage power systems all can not be worked; When motor current sensor detects electric current and is less than protection current, high pressure management ECU pin 8 input 0V voltages, high pressure management ECU pin 11 sends 12V voltage, the output loop adhesive of the first relay, motor works on.
When the output loop of the first relay, the second relay and the 3rd relay, adhesive and compressor be in the course of the work respectively, when compressor current sensor detects electric current and is greater than compressor protection electric current, the pin 7 input 12V voltages of high pressure management ECU, high pressure management ECU pin 10 sends 0V voltage immediately, the output loop of the second relay disconnects, compressor high-tension current is cut off, and other high-voltage power systems still can normally be worked; When compressor current sensor detects electric current and is less than protection current, high pressure management ECU pin 7 input 0V voltages, high pressure management ECU pin 10 sends 12V voltage, the output loop adhesive of the second relay, compressor works on.
When the output loop of the first relay, the second relay and the 3rd relay, adhesive and heating resistor be in the course of the work respectively, when heating resistor current sensor detects electric current and is greater than heating resistor protection current, the pin 6 input 12V voltages of high pressure management ECU, the pin 9 of high pressure management ECU sends 0V voltage immediately, the output loop of the 3rd relay disconnects, the high-tension current of heating resistor is cut off, and other high-voltage power systems still can normally be worked; When heating resistor current sensor detects electric current and is less than protection current, high pressure management ECU pin 6 input 0V voltages, the pin 9 of high pressure management ECU still sends 12V voltage, and the output loop of the 3rd relay disconnects adhesive, and heating resistor works on.
In the present embodiment, when motor is not worked, whether motor connects high-tension current is only determined by the pin 1 of high pressure management ECU, when pin 1 sends 12V voltage, and the output loop adhesive of the first relay, motor is connected high-tension current; When machine operation, whether motor connects high-tension current is determined jointly by pin 1 and the pin 8 of high pressure management ECU, but preferentially by pin 8, is determined, when pin 1 sends 12V voltage, if pin 8 sends 0V voltage, the first relay output loop disconnects, and motor disconnects high-tension current.
The same with the logic strategy of motor, when compressor is not worked, whether compressor connects high-tension current is only determined by the pin 1 of high pressure management ECU, but during compressor operating, mainly by high pressure management EUC pin 1 and pin 7, is determined, but preferentially by pin 7, determined.
Equally, when heating resistor is not worked, whether heating resistor connects high-tension current is only determined by a pin 1 of high pressure management ECU, but during compressor operating, mainly by high pressure management EUC pin 1 and pin 6, is determined, but preferentially by pin 6, determined.
Pin 4 and the pin 5 of high pressure management ECU are CAN output pin, connect display instrument, and when pin 8, pin 7, the pin 6 of high pressure management ECU are inputted respectively 0V voltage, display instrument shows that the state of motor, compressor and heating resistor is normal; When pin 8, pin 7, pin 6 are inputted respectively 12V voltage, display instrument shows motor, compressor and heating resistor fault.
Fig. 2 is the workflow diagram of electric automobile high-voltage protection system of the present invention; as seen from the figure; motor current sensor detects current of electric and is transferred to the pin 8 of high pressure management ECU; compressor current sensor detects compressor current and is transferred to the pin 7 of high pressure management ECU, and heating resistor current sensor detects heating resistor electric current and is transferred to the pin 6 of high pressure management ECU.When current of electric is greater than electric motor protecting electric current, the output loop of the first relay disconnects, cut off high power supply, and all high-voltage power systems all can not be worked; When compressor current is greater than compressor protection electric current, the output loop of the second relay disconnects, 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 is greater than heating resistor protection current, the output loop of the 3rd relay disconnects, 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-voltage power systems is all less than or equal to protection current corresponding to each system, the equal adhesive of output loop of all relays, all high-pressure systems all can normally be worked.
The present invention is from the viewpoint of the demand two of high-pressure security protection and the actual use of vehicle, and by two ranks of the protection class of high-voltage power system, i.e. the protection of motor driven systems belongs to one-level, and the protection of compressor and heating resistor belongs to secondary.When the electric currents such as short circuit appear in first class of protection system, increase suddenly situation, should cut off immediately battery pack main power source, the power-off of all high pressure consumers; When first class of protection system trouble free, and there is the situations such as suddenly increases of the electric currents such as short circuit in second class protection system, and the second class protection system that cut-out is broken down guarantees that first class of protection service system can normally work.
In the description of this specification sheets, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations 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: in the situation that not departing 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 by claim and equivalent thereof.
Claims (6)
1. an electric automobile high-voltage protection system, comprises car load ECU, battery pack, motor, compressor and heating resistor, it is characterized in that: also comprise high pressure management ECU, the control signal input end of described high pressure management ECU is connected with car load ECU;
Described high pressure management ECU has first sensor signal input part, the second sensor signal input end and the 3rd sensor signal input end, described first sensor signal input part is connected with motor current sensor, described the second sensor signal input end is connected with compressor current sensor, and described the 3rd sensor signal input end is connected with heating resistor current sensor;
Described high pressure management ECU has first signal mouth, secondary signal mouth and the 3rd signal output part, described first signal mouth is connected with the input circuit of the first relay, described secondary signal mouth is connected with the input circuit of the second relay, described the 3rd signal output part is connected with the input circuit of the 3rd relay, the A port of the output loop of described the first relay connects battery pack, the B port of the output loop of described the first relay connects motor, the output loop of described the second relay connects the B port of compressor and the first relay output loop, the output loop of described the 3rd relay connects the B port of the output loop of heating resistor and the first relay, described high pressure management ECU is by the first relay, the break-make of the output loop of the second relay and the 3rd relay realizes motor, the break-make of the high voltage supply of compressor and heating resistor.
2. electric automobile high-voltage protection system as claimed in claim 1; it is characterized in that: the control that first signal mouth, secondary signal mouth and the 3rd signal output part of described high pressure management ECU is subject to internal clock signal is output signal sequentially; when first signal mouth, secondary signal mouth and the 3rd signal output part of described high pressure management ECU all need output signal; described first signal mouth is output signal first; then; secondary signal mouth is output signal again, described the 3rd signal output part final output signal.
3. electric automobile high-voltage protection system as claimed in claim 1 or 2, is characterized in that: the model of described high pressure management ECU is S12C.
4. electric automobile high-voltage protection system as claimed in claim 1, is characterized in that: the model of described car load ECU is MC9S12XEP100.
5. electric automobile high-voltage protection system as claimed in claim 1, is characterized in that: also comprise display instrument, described display instrument is connected with high pressure management ECU, for showing the mode of operation of motor, compressor and heating resistor.
6. electric automobile high-voltage protection system as claimed in claim 5, is characterized in that: described display instrument is connected with high pressure management ECU by CAN communication line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210166639.8A CN102673402B (en) | 2012-05-25 | 2012-05-25 | High-voltage protective system of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210166639.8A CN102673402B (en) | 2012-05-25 | 2012-05-25 | High-voltage protective system of electric automobile |
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| Publication Number | Publication Date |
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| CN102673402A CN102673402A (en) | 2012-09-19 |
| CN102673402B true 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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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103587420B (en) * | 2013-10-30 | 2016-05-25 | 三一重机有限公司 | Protecting against shock electrical system and engineering machinery |
| CN103568846B (en) * | 2013-10-30 | 2016-06-15 | 力帆实业(集团)股份有限公司 | High-voltage protective system of electric automobile and 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 |
| 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 |
| 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 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0787608A (en) * | 1993-09-16 | 1995-03-31 | Nippondenso Co Ltd | High voltage circuit breaker for electric automobile |
| JP4543781B2 (en) * | 2004-06-25 | 2010-09-15 | トヨタ自動車株式会社 | Power supply |
| JP2006217743A (en) * | 2005-02-04 | 2006-08-17 | Toyota Motor Corp | Electric load control device |
| CN101572332B (en) * | 2009-06-08 | 2012-03-28 | 奇瑞汽车股份有限公司 | Control system of high-voltage battery and control method thereof |
| CN102320246B (en) * | 2011-06-30 | 2013-05-22 | 奇瑞汽车股份有限公司 | Safety control system for air conditioner of electric vehicle and control method thereof |
| CN202685968U (en) * | 2012-05-25 | 2013-01-23 | 力帆实业(集团)股份有限公司 | Electric car high voltage protection system |
| CN102826017B (en) * | 2012-09-06 | 2015-02-11 | 浙江吉利汽车研究院有限公司杭州分公司 | High-voltage safety protection system of electromobile |
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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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