CN202685968U - Electric car high voltage protection system - Google Patents

Electric car high voltage protection system Download PDF

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Publication number
CN202685968U
CN202685968U CN 201220238770 CN201220238770U CN202685968U CN 202685968 U CN202685968 U CN 202685968U CN 201220238770 CN201220238770 CN 201220238770 CN 201220238770 U CN201220238770 U CN 201220238770U CN 202685968 U CN202685968 U CN 202685968U
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China
Prior art keywords
relay
signal
high pressure
pressure management
management ecu
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Withdrawn - After Issue
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CN 201220238770
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Chinese (zh)
Inventor
隋毅
叶明�
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Lifan Technology Group Co Ltd
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Lifan Industry Group Co Ltd
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Priority to CN 201220238770 priority Critical patent/CN202685968U/en
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Publication of CN202685968U publication Critical patent/CN202685968U/en
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Abstract

The utility model provides an electric car high voltage protection system which comprises a finished automobile electronic control unit (ECU), a battery set, a motor, a compressor, a heating resistor, a high voltage management ECU and relays. An A end port of an output circuit of a first relay is connected with a battery set, a B end port of the output circuit of the first relay is connected with the motor, an output circuit of a second relay is connected wit the compressor and the B end port of the output circuit, and an output circuit of a third relay is connected with a heating resistor and the B end port of the output circuit of the first relay. The electric car high voltage protection system only cut off a high voltage power supply of a fault system when a general high voltage power system goes wrong instead of cutting off a total power supply when any high voltage system goes wrong. Normal working of other high voltage systems is not affected. When a motor driving system goes wrong, the total power supply goes wrong. The electric car high voltage protection system uses relays to protect high voltage systems to prevent the relay bodies from being damaged. Compared with a traditional method using a fuse, the electric car high voltage protection system is convenient to use.

Description

A kind of electric automobile high-voltage protection system
Technical field
The utility model relates to the 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 might cause Danger Electric shock risk to chaufeur or passenger; and may make the vehicle high-pressure system cause damage even burning; 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.The conventional electric automobile is when carrying out the 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 fault such as short circuit; although this protection strategy can maximizedly be finished the 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; working properly such as other high-voltage power systems of electronlmobil; only have compressor to break down; current sensor shows that compressor current increases suddenly several times even decades of times; the design of Security Techniques can be interrupted the high voltage supply of compressor fully, and does not affect other high-voltage power systems normal operations such as motor 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 again change a new fuse, and work is loaded down with trivial details concerning the car owner.
The utility model content
The utility model is intended to solve at least the technical matters that exists in the 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 utility model, the utility model 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 links to each other 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 links to each other with motor current sensor, described the second sensor signal input end links to each other with the compressor current sensor, and described the 3rd sensor signal input end links to each other with the heating resistor current sensor; Described high pressure management ECU has the first signal mouth, secondary signal mouth and the 3rd signal output part, described first signal mouth links to each other with the input circuit of the first relay, described secondary signal mouth links to each other with the input circuit of the second relay, described 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 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, and 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 utility model is not just directly to cut 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 affect the normal operation of other high-pressure systems; Only have and when motor driven systems is out of order, just cut off general supply.The utility model 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 utility model and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Description of drawings
Above-mentioned and/or additional aspect of the present utility model and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is the structural representation of the utility model electric automobile high-voltage protection system;
Fig. 2 is the workflow diagram of the utility model electric automobile high-voltage protection system.
The specific embodiment
The below describes embodiment of the present utility model in detail, and the example of described embodiment is shown in the drawings, and wherein identical or similar label represents identical or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " vertically ", " laterally ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only be for convenience of description the utility model and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.
In description of the present utility model, unless otherwise prescribed and limit, need to prove that 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 indirectly link to each other 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 the utility model electric automobile high-voltage protection system; 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 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 the first signal mouth, secondary signal mouth and the 3rd signal output part, the first signal mouth links to each other with the input circuit of the first relay, the secondary signal mouth links to each other with the input circuit of the 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 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, and ECU is by the first relay in the 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 subjected 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, the first signal mouth is output signal at first, then, the 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 links to each other with high pressure management ECU by the CAN communication line, is used for showing the mode of operation of motor, compressor and heating resistor.
In Fig. 1, the pin 1 of high pressure management ECU is the control signal input end, the incoming signal of this pin 1 is the switching value signal, be 0V or 12V, and 12V is effective, and the pin 2 of high pressure management ECU is connected negative electrode and the anode that connects respectively external source with pin, in the present embodiment, adopt the external source of 12V, the pin 4 of high pressure management ECU links to each other with display instrument by 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 are the switching value signal, be 0V or 12V, and 12V is effective.Pin 11 is the first signal mouth, 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, the pin 11 that is high pressure management ECU at first sends out 0V voltage, then, the pin 10 of high pressure management ECU sends out 0V voltage again, and is 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 in respectively 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 gets electric 12V, the pin 11 of high pressure management ECU, pin 10, pin 9 send successively the 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, then motor, compressor and heating resistor are connected respectively the high-tension current that battery pack provides, and can work.
Adhesive and motor be in the course of the work respectively when the output loop of the first relay, the 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, the output loop of the first relay disconnects, cut off the battery pack main circuit power, all high-voltage power 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 the first relay, motor works on.
Adhesive and compressor be in the course of the work respectively when the output loop of the first relay, the second relay and the 3rd relay, when the compressor current sensor detects 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, the output loop of the second relay disconnects, the compressor high-tension current is cut off, and other high-voltage power systems still can work; When the compressor current sensor detects 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 the second relay, compressor works on.
Adhesive and heating resistor be in the course of the work respectively when the output loop of the first relay, the second relay and the 3rd relay, when the heating resistor current sensor detects 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, 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 work; When the heating resistor current sensor detects 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 disconnects adhesive, and heating resistor works on.
In the present embodiment, when motor was not worked, whether motor connects high-tension current was only determined by the pin 1 of high pressure management ECU, when pin 1 sends 12V voltage, and the then 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 decisions, 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 was not worked, whether compressor connects high-tension current was only determined by the pin 1 of high pressure management ECU, but during compressor operating, was mainly determined by high pressure management EUC pin 1 and pin 7, but preferentially determined by pin 7.
Equally, when heating resistor was not worked, whether heating resistor connects high-tension current was only determined by the pin 1 of high pressure management ECU, but during compressor operating, was mainly determined by high pressure management EUC pin 1 and pin 6, but preferentially determined by pin 6.
Pin 4 and the pin 5 of high pressure management ECU be the CAN output pin, connect display instrument, and when the pin 8 of high pressure management ECU, pin 7, when pin 6 is inputted respectively 0V voltage, the state of display instrument demonstration motor, compressor and heating resistor is normal; When pin 8, pin 7, when pin 6 is inputted respectively 12V voltage, display instrument shows motor, compressor and heating resistor fault.
Fig. 2 is the workflow diagram of the utility model electric automobile high-voltage protection system; as seen from the figure; motor current sensor detects current of electric and is transferred to the pin 8 of high pressure management ECU; the compressor current sensor detects compressor current and is transferred to the pin 7 of high pressure management ECU, and the heating resistor current sensor detects the heating resistor electric current and 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 the first relay disconnects, the cut off high power supply, and all high-voltage power systems all can not be worked; When compressor current during greater than the 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 during greater than the 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 all is less than or equal to protection current corresponding to each system, the equal adhesive of the output loop of all relays, all high-pressure systems all can work.
The utility model 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-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.The electric current such as short circuit occurring when the first class of protection system increases suddenly situation, should cut off immediately the battery pack main power source, all high pressure consumers outages; When first class of protection system trouble free, and the situations such as suddenly increase of electric current such as short circuit appear in the second class protection system, cut off the second class protection system that breaks down, and guarantee that the first class of protection service system can 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 utility model or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple variation, modification, replacement and modification to these embodiment in the situation that does not break away from principle of the present utility model and aim, scope of the present utility model 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 links to each other 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 links to each other with motor current sensor, described the second sensor signal input end links to each other with the compressor current sensor, and described the 3rd sensor signal input end links to each other with the heating resistor current sensor;
Described high pressure management ECU has the first signal mouth, secondary signal mouth and the 3rd signal output part, described first signal mouth links to each other with the input circuit of the first relay, described secondary signal mouth links to each other with the input circuit of the second relay, described 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 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, and 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 subjected 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 at first; then; the 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, it 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 links to each other with high pressure management ECU, is used for the mode of operation of demonstration motor, compressor and heating resistor.
6. electric automobile high-voltage protection system as claimed in claim 5 is characterized in that: described display instrument links to each other by CAN communication line and high pressure management ECU.
CN 201220238770 2012-05-25 2012-05-25 Electric car high voltage protection system Withdrawn - After Issue CN202685968U (en)

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CN 201220238770 CN202685968U (en) 2012-05-25 2012-05-25 Electric car high voltage protection system

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Application Number Priority Date Filing Date Title
CN 201220238770 CN202685968U (en) 2012-05-25 2012-05-25 Electric car high voltage protection system

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102673402A (en) * 2012-05-25 2012-09-19 力帆实业(集团)股份有限公司 High-voltage protective system of electric automobile
CN103612567A (en) * 2013-11-22 2014-03-05 上海翼锐汽车科技有限公司 Electric vehicle high voltage safety protecting system and method
CN107776426A (en) * 2017-10-20 2018-03-09 成都雅骏新能源汽车科技股份有限公司 Power battery of electric vehicle energy stream monitoring system
CN112606692A (en) * 2020-12-28 2021-04-06 重庆大学 Electric automobile safety protection device and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102673402A (en) * 2012-05-25 2012-09-19 力帆实业(集团)股份有限公司 High-voltage protective system of electric automobile
CN103612567A (en) * 2013-11-22 2014-03-05 上海翼锐汽车科技有限公司 Electric vehicle high voltage safety protecting system and method
CN103612567B (en) * 2013-11-22 2015-12-09 上海翼锐汽车科技有限公司 A kind of High-voltage safety protection system of electromobile and method thereof
CN107776426A (en) * 2017-10-20 2018-03-09 成都雅骏新能源汽车科技股份有限公司 Power battery of electric vehicle energy stream monitoring system
CN112606692A (en) * 2020-12-28 2021-04-06 重庆大学 Electric automobile safety protection device and method

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