CN203666410U - High-voltage system protection device of hybrid electric vehicle - Google Patents
High-voltage system protection device of hybrid electric vehicle Download PDFInfo
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- CN203666410U CN203666410U CN201320866073.XU CN201320866073U CN203666410U CN 203666410 U CN203666410 U CN 203666410U CN 201320866073 U CN201320866073 U CN 201320866073U CN 203666410 U CN203666410 U CN 203666410U
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Abstract
A high-voltage system protection device of a hybrid electric vehicle comprises a high-voltage battery, a driving motor, a high-voltage junction box, a current sensor, a signal processing module, a comparator, a driving module, a high-voltage relay and a power resistor; when the high-voltage circuit breaker is used, a current sensor is used for instantly collecting current signals in a high-voltage circuit formed by the high-voltage junction box and the high-voltage battery, the collected current signals are sequentially processed by the signal processing module, the comparator and the driving module, and the high-voltage relay is controlled to be closed or closed according to the processing result so as to determine whether the power resistor is involved in the high-voltage circuit formed by the high-voltage junction box and the high-voltage battery, so that the high-voltage accessory is prevented from being damaged due to frequent reversing of bus current, a vehicle high-voltage system is effectively protected, and the high-voltage accessory is not required to be stopped. Therefore, the design can effectively protect the high-voltage system of the vehicle under the condition of not influencing the dynamic property of the whole vehicle.
Description
Technical field
The utility model relates to a kind of high-pressure system fender guard; relate in particular to a kind of hybrid electric vehicle high-pressure system fender guard; belong to electric automobile high-voltage safety method protection field, be specifically applicable to, in the situation that not affecting car load dynamic property, effectively protect vehicle high-pressure system.
Background technology
At present, hybrid vehicle and pure electric automobile are generally all provided with the high pressure annexes such as electric hydraulic power-assisted steering, electric air-conditioning, electric air compressor, DC/DC conv, and these high pressure annex collectives are connected in the positive and negative end of high-tension battery in parallel with the form of high pressure distribution box without protectors and drive motor.In each high pressure annex loop, be provided with the high-tension fuse of certain specification, to guarantee that the safety of high pressure annex when overcurrent condition occurs in high pressure annex loop.
Drive motor both can be used as direct motor drive Vehicle Driving Cycle, also can be used as electrical generator generating and produced power storage in high-tension battery.But due to the complexity of Vehicle Driving Cycle road conditions, motor need to frequently switch between electric model and power generation mode, this will cause the frequent commutation of motor high tension loop median generatrix electric current, cause bus current to change greatly, and due in whole high-pressure system, high pressure annex and motor belong to relation in parallel, once the immediate current that motor produces is larger, exceed the absorption power of high-tension battery, part current potential must flow to high pressure annex loop, cause high-tension fuse in high pressure annex loop to burn because of overcurrent, high pressure annex will quit work, thereby affect vehicle safe driving.
Chinese patent Granted publication number is CN202042798U; Granted publication day is that the utility model patent on November 16th, 2011 discloses a kind of high-voltage power distribution system for electric automobiles; in this high tension distribution system; multiple high pressure annexes are connected in the positive and negative end of high-tension battery in parallel with the form of high pressure distribution box without protectors and drive motor with regard to collective; as air-conditioning compressor, power-assisted steering device, air compressor, DC/DC conv etc., and on each high pressure annex, be in series with a current fuse to carry out overcurrent protection.There is previously described defect in this high tension distribution system,, to affect car load dynamic property as sacrifice, could protect vehicle high-pressure system equally.
Summary of the invention
The purpose of this utility model be overcome in prior art, exist to affect car load dynamic property as sacrifice; could protect defect and the problem of vehicle high-pressure system, a kind of hybrid electric vehicle high-pressure system fender guard that does not affect car load dynamic property and just can effectively protect vehicle high-pressure system is provided.
For realizing above object, technical solution of the present utility model is: a kind of hybrid electric vehicle high-pressure system fender guard, comprise high-tension battery, drive motor and high pressure distribution box without protectors, described drive motor, high pressure distribution box without protectors are connected in the positive and negative end of high-tension battery in parallel, and in high pressure distribution box without protectors, are provided with multiple high pressure annexes that are connected in parallel;
Described fender guard also comprises current sensor, signal processing module, comparator, driver module, high-voltage relay and power resistor;
Described current sensor, power resistor are connected in the high tension loop that high pressure distribution box without protectors, high-tension battery form, and power resistor is between current sensor, high pressure distribution box without protectors; The signal output part of described current sensor is connected with one end of the low pressure control port of high-voltage relay successively after signal processing module, comparator, driver module, the other end of low pressure control port and the positive pole of power supply of high-voltage relay are connected, and the high input voltage output port of high-voltage relay is connected with the two ends of power resistor respectively.
Described power supply is 24V low potential source.
Described signal processing module comprises to be processed resistance, No. two processing resistance for No. one and processes electric capacity No. one, described one end of processing resistance, No. two processing resistance for No. is all connected with the signal output part of current sensor, process the other end ground connection of resistance No. one, the one end of processing the other end of resistance and the input end of comparator, a processing electric capacity for No. two is connected, and processes the other end ground connection of electric capacity No. one.
Described driver module comprises driving resistance, No. two driving resistance and drives aerotron No. one, described one end of resistance and the mouth of comparator of driving for No. is connected, drive for No. one the other end of resistance to drive one end of resistance, the base stage of a driving aerotron to be connected with No. two, drive the other end ground connection of resistance No. two, drive the grounded emitter of aerotron No. one, drive for No. one one end of the collecting electrode of aerotron and the low pressure control port of high-voltage relay to be connected, the other end of low pressure control port and the positive pole of power supply of high-voltage relay are connected.
Described high pressure annex comprises DC/DC conv, electric hydraulic power-assisted steering device, electric air-conditioning, electric air compressor, all the other electronic annexes, and correspondingly on each high pressure annex is in series with a high-tension fuse.
Compared with prior art, the beneficial effects of the utility model are:
1, in a kind of hybrid electric vehicle high-pressure system of the utility model fender guard at existing high-tension battery, high pressure distribution box without protectors, on the basis of drive motor, set up current sensor, signal processing module, comparator, driver module, high-voltage relay and power resistor, when use, by current sensor to high pressure distribution box without protectors, current signal in the high tension loop that high-tension battery forms carries out instantaneous acquiring, the current signal collecting is successively through signal processing module, comparator, after driver module is processed, closed according to result control high-voltage relay or close again, thereby determine whether power resistor participates in high pressure distribution box without protectors, in the high tension loop that high-tension battery forms, if power resistor participates in, can share voltage, thereby effectively reduce high pressure distribution box without protectors, electric current in the high tension loop that high-tension battery forms, guarantee that high pressure annex can not damage because of the frequent commutation of bus current, effectively protection vehicle high-pressure system, and need not stop high pressure annex, if power resistor does not participate in, illustrate that the electric current in the high tension loop that high pressure distribution box without protectors, high-tension battery form is less, can not cause obstruction to the normal operation of high pressure annex, high pressure annex also can not stop.Therefore, the utility model can, in the situation that not affecting car load dynamic property, effectively be protected vehicle high-pressure system.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of Fig. 1 mesohigh distribution box without protectors.
In figure: high-tension battery 1, drive motor 2, high pressure distribution box without protectors 3, high pressure annex 30, DC/DC conv 31, electric hydraulic power-assisted steering device 32, electric air-conditioning 33, electric air compressor 34, all the other electronic annexes 35, high-tension fuse 36, current sensor 4, signal processing module 5, process resistance 51 No. one, process resistance 52 No. two, process electric capacity 53 No. one, comparator 6, driver module 7, drive resistance 71 No. one, drive resistance 72 No. two, drive aerotron 73 No. one, high-voltage relay 8, power resistor 9, power supply 10.
The specific embodiment
Below in conjunction with accompanying drawing explanation and the specific embodiment, the utility model is described in further detail.
Referring to figure 1 – Fig. 2, a kind of hybrid electric vehicle high-pressure system fender guard, comprise high-tension battery 1, drive motor 2 and high pressure distribution box without protectors 3, described drive motor 2, high pressure distribution box without protectors 3 are connected in the positive and negative end of high-tension battery 1 in parallel, and in high pressure distribution box without protectors 3, are provided with multiple high pressure annexes 30 that are connected in parallel;
Described fender guard also comprises current sensor 4, signal processing module 5, comparator 6, driver module 7, high-voltage relay 8 and power resistor 9;
Described current sensor 4, power resistor 9 are connected in the high tension loop that high pressure distribution box without protectors 3, high-tension battery 1 form, and power resistor 9 is between current sensor 4, high pressure distribution box without protectors 3; The signal output part of described current sensor 4 is connected with one end of the low pressure control port of high-voltage relay 8 successively after signal processing module 5, comparator 6, driver module 7, the other end of the low pressure control port of high-voltage relay 8 is connected with the positive pole of power supply 10, and the high input voltage output port of high-voltage relay 8 is connected with the two ends of power resistor 9 respectively.
Described power supply 10 is 24V low potential source.
Described signal processing module 5 comprises to be processed resistance 51 for No. one, processes resistance 52 and a processing electric capacity 53 for No. two, the one end of describedly process resistance 51 for No. one, processing resistance 52 for No. two is all connected with the signal output part of current sensor 4, process the other end ground connection of resistance 51 No. one, the one end of processing the other end of resistance 52 and the input end of comparator 6, a processing electric capacity 53 for No. two is connected, and processes the other end ground connection of electric capacity 53 No. one.
Described driver module 7 comprises driving resistance 71 No. one, drive resistance 72 for No. two and drive aerotron 73 No. one, the described one end of resistance 71 that drives for No. is connected with the mouth of comparator 6, drive one end of the other end and No. two driving resistance 72 of resistance 71 for No. one, drive for No. one the base stage of aerotron 73 to be connected, drive the other end ground connection of resistance 72 No. two, drive the grounded emitter of aerotron 73 No. one, drive for No. one one end of the collecting electrode of aerotron 73 and the low pressure control port of high-voltage relay 8 to be connected, the other end of the low pressure control port of high-voltage relay 8 is connected with the positive pole of power supply 10.
Described high pressure annex 30 comprises DC/DC conv 31, electric hydraulic power-assisted steering device 32, electric air-conditioning 33, electric air compressor 34, all the other electronic annexes 35, and correspondingly on each high pressure annex 30 is in series with a high-tension fuse 36.
A using method for above-mentioned hybrid electric vehicle high-pressure system fender guard, described using method comprises the following steps:
First high-voltage relay 8 is set to closure state, now power resistor 9 is at high pressure distribution box without protectors 3, in the high tension loop that high-tension battery 1 forms, do not participate in work, again by current sensor 4 to high pressure distribution box without protectors 3, current signal in the high tension loop that high-tension battery 1 forms gathers, and the current signal collecting is passed to signal processing module 5, by signal processing module 5, current signal is processed into voltage signal again, and pass to comparator 6, then by comparator 6, the voltage signal receiving and VREF (Voltage Reference) are compared, and comparative result is passed to driver module 7, again by driver module 7 closed or disconnection according to comparative result control high-voltage relay 8:
In the time that voltage signal is more than or equal to VREF (Voltage Reference), driver module 7 is controlled high-voltage relay 8 and is disconnected, and now, participation work in the high tension loop that power resistor 9 forms at high pressure distribution box without protectors 3, high-tension battery 1, to reduce the electric current in high tension loop;
In the time that voltage signal is less than VREF (Voltage Reference), driver module 7 is controlled high-voltage relay 8 and is continued closure, in the high tension loop that power resistor 9 forms at high pressure distribution box without protectors 3, high-tension battery 1, does not participate in work.
Principle of the present utility model is described as follows:
1, the control background of high-voltage relay:
Drive motor and high pressure distribution box without protectors are also connected in the positive and negative end of high-tension battery, described drive motor both can carry out electric model and drive vehicle, also can carry out power generation mode and produce electric energy, due to the complexity of car load driving cycle, drive motor, in Vehicle Driving Cycle process, switches frequently between electric model and power generation mode.When drive motor is during in drive pattern, be equivalent to a load, in parallel with high pressure distribution box without protectors, provide electric energy work by high-tension battery; When drive motor is during in power generation mode, be equivalent to a power supply, now high-tension battery is equivalent to a load, absorbs the electric energy that storing driver electric power generation produces, simultaneously again for the high pressure annex in high pressure distribution box without protectors provides electric energy.This frequent switching between electric model and power generation mode of motor, can cause the frequent commutation of motor high tension loop median generatrix electric current, cause bus current to change greatly, and high pressure annex and motor are relations in parallel, once the immediate current that motor produces is larger, exceed the absorption power of high-tension battery, part current potential must flow to high pressure annex loop, cause high-tension fuse in high pressure annex loop to burn because of overcurrent, high pressure annex quits work, and affects vehicle safe driving.For solving this defect, the design solves the problem of high-pressure and overflowing by the closed or disconnection of high-voltage relay, and does not need to stop the work of high pressure annex, and particular case is as follows:
Current sensor can collect the current signal in the high tension loop that any time consists of high pressure distribution box without protectors, high-tension battery, and this signal is exported to signal processing module, by signal processing module, this current signal being carried out to signal processing is converted to after voltage signal, export to again comparator, comparator compares the voltage signal receiving and the VREF (Voltage Reference) that can demarcate, and comparative result is exported to driver module.Because the mouth of driver module, the positive pole of 24V power supply are connected to the two ends of high-voltage relay low pressure control port, so driver module can be according to the information obtaining from comparator, control closure and the disconnection of high-voltage relay low-voltage control circuit, thereby control closure and the disconnection of high-voltage relay high-voltage output end.
2, the closure of high-voltage relay:
Generally, high-voltage relay closure, the high tension loop that high pressure distribution box without protectors, high-tension battery form is: the high potential relay – of high-tension battery positive utmost point – electricity stream sensor – high pressure separated time box – high-tension battery negative pole.
3, the disconnection of high-voltage relay:
The current value collecting when current sensor is during higher than the maximum trouble free service electric current of high pressure distribution box without protectors inner high voltage annex (result by comparator comparison shows), driver module is by according to the result of comparator comparison, disconnect high-voltage relay, now, the high tension loop that high pressure distribution box without protectors, high-tension battery form is: the positive utmost point – electricity of high-tension battery stream sensor – power electricity resistance – high pressure separated time box – high-tension battery negative pole.Now, because power resistor is linked in the high tension loop that high pressure distribution box without protectors, high-tension battery form, share part voltage, effectively reduce the electric current in the high tension loop that high pressure distribution box without protectors and high-tension battery form, guarantee the impact that high pressure annex is not brought by the frequent commutation of motor bus current.In addition, in whole protection process, do not need to stop high pressure annex, do not affect the tractive performance of car load completely.
4, high pressure annex:
In high pressure distribution box without protectors, mainly comprise multiple DC/DC convs that are connected in parallel, electric hydraulic power-assisted steering device, electric air-conditioning, electric air compressor, all the other electronic annexes, and correspondingly on each high pressure annex be in series with a high-tension fuse to guarantee the trouble free service of corresponding high pressure annex.
Embodiment 1:
A kind of hybrid electric vehicle high-pressure system fender guard, comprises high-tension battery 1, drive motor 2, high pressure distribution box without protectors 3, current sensor 4, signal processing module 5, comparator 6, driver module 7, high-voltage relay 8 and power resistor 9; Described drive motor 2, high pressure distribution box without protectors 3 are connected in the positive and negative end of high-tension battery 1 in parallel, in high pressure distribution box without protectors 3, be provided with multiple high pressure annexes 30 that are connected in parallel, these high pressure annexes 30 comprise DC/DC conv 31, electric hydraulic power-assisted steering device 32, electric air-conditioning 33, electric air compressor 34, all the other electronic annexes 35, and correspondingly on each high pressure annex 30 are in series with a high-tension fuse 36;
Described current sensor 4, power resistor 9 are connected in the high tension loop that high pressure distribution box without protectors 3, high-tension battery 1 form, and power resistor 9 is between current sensor 4, high pressure distribution box without protectors 3; The signal output part of described current sensor 4 is connected with one end of the low pressure control port of high-voltage relay 8 successively after signal processing module 5, comparator 6, driver module 7, the other end of the low pressure control port of high-voltage relay 8 and power supply 10(24V low potential source) positive pole be connected, the high input voltage output port of high-voltage relay 8 is connected with the two ends of power resistor 9 respectively;
Described signal processing module 5 comprises to be processed resistance 51 for No. one, processes resistance 52 and a processing electric capacity 53 for No. two, the one end of describedly process resistance 51 for No. one, processing resistance 52 for No. two is all connected with the signal output part of current sensor 4, process the other end ground connection of resistance 51 No. one, the one end of processing the other end of resistance 52 and the input end of comparator 6, a processing electric capacity 53 for No. two is connected, and processes the other end ground connection of electric capacity 53 No. one;
Described driver module 7 comprises driving resistance 71 No. one, drive resistance 72 for No. two and drive aerotron 73 No. one, the described one end of resistance 71 that drives for No. is connected with the mouth of comparator 6, drive one end of the other end and No. two driving resistance 72 of resistance 71 for No. one, drive for No. one the base stage of aerotron 73 to be connected, drive the other end ground connection of resistance 72 No. two, drive the grounded emitter of aerotron 73 No. one, drive for No. one one end of the collecting electrode of aerotron 73 and the low pressure control port of high-voltage relay 8 to be connected, the other end of the low pressure control port of high-voltage relay 8 and power supply 10(24V low potential source) positive pole be connected.
A using method for above-mentioned hybrid electric vehicle high-pressure system fender guard, described using method comprises the following steps:
First high-voltage relay 8 is set to closure state, now power resistor 9 is at high pressure distribution box without protectors 3, in the high tension loop that high-tension battery 1 forms, do not participate in work, again by current sensor 4 to high pressure distribution box without protectors 3, current signal in the high tension loop that high-tension battery 1 forms gathers, and the current signal collecting is passed to signal processing module 5, by signal processing module 5, current signal is processed into voltage signal again, and pass to comparator 6, then by comparator 6, the voltage signal receiving and VREF (Voltage Reference) are compared, and comparative result is passed to driver module 7, again by driver module 7 closed or disconnection according to comparative result control high-voltage relay 8:
In the time that voltage signal is more than or equal to VREF (Voltage Reference), driver module 7 is controlled high-voltage relay 8 and is disconnected, now, participation work in the high tension loop that power resistor 9 forms at high pressure distribution box without protectors 3, high-tension battery 1, consume electric energy, reduce the electric current in loop, effectively protect whole high-pressure system, thereby guarantee car load safety traffic;
In the time that voltage signal is less than VREF (Voltage Reference), driver module 7 is controlled high-voltage relay 8 and is continued closure, in the high tension loop that power resistor 9 forms at high pressure distribution box without protectors 3, high-tension battery 1, does not participate in work, does not affect car load tractive performance.
Claims (5)
1. a hybrid electric vehicle high-pressure system fender guard; comprise high-tension battery (1), drive motor (2) and high pressure distribution box without protectors (3); described drive motor (2), high pressure distribution box without protectors (3) are connected in the positive and negative end of high-tension battery (1) in parallel; and in high pressure distribution box without protectors (3), be provided with multiple high pressure annexes (30) that are connected in parallel, it is characterized in that:
Described fender guard also comprises current sensor (4), signal processing module (5), comparator (6), driver module (7), high-voltage relay (8) and power resistor (9);
Described current sensor (4), power resistor (9) are connected in the high tension loop that high pressure distribution box without protectors (3), high-tension battery (1) form, and power resistor (9) is positioned between current sensor (4), high pressure distribution box without protectors (3); The signal output part of described current sensor (4) is connected with one end of the low pressure control port of high-voltage relay (8) successively after signal processing module (5), comparator (6), driver module (7), the other end of the low pressure control port of high-voltage relay (8) is connected with the positive pole of power supply (10), and the high input voltage output port of high-voltage relay (8) is connected with the two ends of power resistor (9) respectively.
2. a kind of hybrid electric vehicle high-pressure system fender guard according to claim 1, is characterized in that: described power supply (10) is 24V low potential source.
3. a kind of hybrid electric vehicle high-pressure system fender guard according to claim 1 and 2, it is characterized in that: described signal processing module (5) comprises processes resistance (51) No. one, process resistance (52) for No. two and process electric capacity (53) with No. one, process resistance (51) described No. one, the one end of processing resistance (52) for No. two is all connected with the signal output part of current sensor (4), process the other end ground connection of resistance (51) No. one, process the other end of resistance (52) and the input end of comparator (6) No. two, the one end of processing electric capacity (53) for No. one is connected, process the other end ground connection of electric capacity (53) No. one.
4. a kind of hybrid electric vehicle high-pressure system fender guard according to claim 1 and 2, it is characterized in that: described driver module (7) comprises a driving resistance (71), drive for No. two resistance (72) to drive aerotron (73) with No. one, the described one end of resistance (71) that drives for No. is connected with the mouth of comparator (6), drive one end of the other end and No. two driving resistance (72) of resistance (71) for No. one, drive for No. one the base stage of aerotron (73) to be connected, drive the other end ground connection of resistance (72) No. two, drive the grounded emitter of aerotron (73) No. one, drive for No. one the collecting electrode of aerotron (73) to be connected with one end of the low pressure control port of high-voltage relay (8), the other end of the low pressure control port of high-voltage relay (8) is connected with the positive pole of power supply (10).
5. a kind of hybrid electric vehicle high-pressure system fender guard according to claim 1 and 2; it is characterized in that: described high pressure annex (30) comprises DC/DC conv (31), electric hydraulic power-assisted steering device (32), electric air-conditioning (33), electric air compressor (34), all the other electronic annexes (35), and on each high pressure annex (30) the corresponding high-tension fuse (36) that is in series with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320866073.XU CN203666410U (en) | 2013-12-26 | 2013-12-26 | High-voltage system protection device of hybrid electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320866073.XU CN203666410U (en) | 2013-12-26 | 2013-12-26 | High-voltage system protection device of hybrid electric vehicle |
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| CN203666410U true CN203666410U (en) | 2014-06-25 |
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| CN201320866073.XU Expired - Lifetime CN203666410U (en) | 2013-12-26 | 2013-12-26 | High-voltage system protection device of hybrid electric vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103660955A (en) * | 2013-12-26 | 2014-03-26 | 东风商用车有限公司 | High-voltage system protection device of hybrid electric vehicle and use method thereof |
| CN110857031A (en) * | 2018-08-07 | 2020-03-03 | 通用汽车环球科技运作有限责任公司 | Electrical system with high voltage system locking function |
-
2013
- 2013-12-26 CN CN201320866073.XU patent/CN203666410U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103660955A (en) * | 2013-12-26 | 2014-03-26 | 东风商用车有限公司 | High-voltage system protection device of hybrid electric vehicle and use method thereof |
| CN103660955B (en) * | 2013-12-26 | 2015-10-14 | 东风商用车有限公司 | High-voltage system protection device of hybrid electric vehicle and use method thereof |
| CN110857031A (en) * | 2018-08-07 | 2020-03-03 | 通用汽车环球科技运作有限责任公司 | Electrical system with high voltage system locking function |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20140625 Effective date of abandoning: 20151014 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |