CN104149627A - Electric appliance starting protecting device for electric vehicle - Google Patents
Electric appliance starting protecting device for electric vehicle Download PDFInfo
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- CN104149627A CN104149627A CN201410424697.5A CN201410424697A CN104149627A CN 104149627 A CN104149627 A CN 104149627A CN 201410424697 A CN201410424697 A CN 201410424697A CN 104149627 A CN104149627 A CN 104149627A
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Abstract
The invention provides an electric appliance starting protecting device for an electric vehicle. The protecting device comprises a starting circuit and a protecting circuit, wherein the starting circuit comprises an input end, a load end and a main current limiting resistor, and the main current limiting resistor is arranged between the input end and the load end; the input end is connected with a power battery, and the load end is connected with a power electric appliance part; the protecting circuit and the starting circuit are connected in parallel; the protecting circuit is connected to a control system of the electric vehicle. The protecting circuit comprising a damage judging loop and an overcurrent feedback loop can be scientifically and reasonably selected to be applied to and carried on the electric vehicle according to actual conditions, the power electric appliance system is protected, and meanwhile, the overall reliability of the electric vehicle is improved.
Description
Technical field
The present invention relates to electronlmobil electric system, be specifically related to a kind of appliance starting fender guard for electronlmobil.
Background technology
Along with the energy and environmental problem become the focus of concern in the world, the electrokinetic cell of usining becomes one of main direction of automobile industry development as the electronlmobil of propulsion source because of the feature of its environment-protecting clean.In the startup moment of the high-power electric appliance electricity of electronlmobil, starting current is very large, (relevant with DC terminal capacitance size in load end, according to load capacitance, vary in size, starting current can reach 500A～2000A.) such instantaneous large-current may cause the contact of high-voltage relay to be burnt, or affect to a great extent the electric capacity life-span in load.For preventing that battery-driven car from starting the heavy current impact of moment, need to when starting, to starting current, be limited, this limit procedure is called precharge.
At present, pre-charge process only relies on a high-power resistance (being pre-charge resistance) to realize, but in actual application, once pre-charge resistance exceeds design objective (as peak power, precharge time etc.) work, just the as easy as rolling off a log damage of pre-charge resistance.And the control system of automobile after it damages because obtaining the current state of pre-charge resistance, also just cannot clearly determine whether and damage.Therefore after pre-charge resistance damages, by starting the defencive function of moment, the whole reliability of system being reduced because losing, affect to a certain extent driving safety.
Summary of the invention
In view of this, the invention provides a kind of appliance starting fender guard for electronlmobil, be intended to can the mode of operation of main current-limiting resistance (pre-charge resistance in corresponding background technology) be monitored and be fed back.
The technical solution used in the present invention is specially: a kind of appliance starting fender guard for electronlmobil, and comprise and start loop and protection loop, wherein:
Described startup loop comprises input end, load end and main current-limiting resistance, and described main current-limiting resistance is placed between described input end and described load end; Described input end is connected with electrokinetic cell, and described load end is connected with power electric component;
Described protection loop is in parallel with described startup loop.
Described protection loop is for damaging determination circuit, and resistance is judged in the damage that described damage determination circuit is placed between described input end and described load end, and described damage judges that the resistance value of resistance is greater than the resistance value of described main current-limiting resistance.
Described protection loop is overcurrent backfeed loop; described overcurrent backfeed loop is Zener diode, optocoupler current-limiting resistance and the optocoupler being placed between described input end and described load end; described Zener diode, described optocoupler current-limiting resistance and the light-emitting diode in described optocoupler are connected successively; the isolation end of described optocoupler is connected with described control system, and described control system is by the overcurrent whether of main current-limiting resistance described in protection monitor loop.
Described protection loop comprises damages determination circuit and overcurrent backfeed loop, and described damage determination circuit and described overcurrent backfeed loop are in parallel with described startup loop respectively, wherein:
Resistance is judged in the damage that described damage determination circuit is placed between described input end and described load end, and described damage judges that the resistance value of resistance is greater than the resistance value of described main current-limiting resistance;
Described overcurrent backfeed loop is Zener diode, optocoupler current-limiting resistance and the optocoupler being placed between described input end and described load end; described Zener diode, described optocoupler current-limiting resistance and the light-emitting diode in described optocoupler are connected successively; the isolation end of described optocoupler is connected with described control system, and whether described control system opens circuit by main current-limiting resistance described in protection monitor loop.
The resistance value of described main current-limiting resistance is 20-200 Ω.
Described damage judges that the resistance value of resistance is 1-4M Ω.
The beneficial effect that the present invention produces is:
Appliance starting fender guard for electronlmobil of the present invention has increased the feedback function of current-limiting resistance mode of operation to main current-limiting resistance; can in the working process of power electrical equipment, to control system, report main current-limiting resistance whether to be operated in normal operation interval in real time, and can after main current-limiting resistance damages, be convenient to control system fault verification.And according to actual conditions, can select damage determination circuit and/or overcurrent backfeed loop to apply scientifically and rationally and be equipped on electronlmobil, protect whole power electric system, promote the global reliability of electronlmobil.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, can more completely understand better the present invention.Accompanying drawing described herein is used to provide a further understanding of the present invention, and embodiment and explanation thereof are used for explaining the present invention, does not form inappropriate limitation of the present invention.
Fig. 1 is the circuit theory schematic diagram two (whether monitor main current-limiting resistance opens circuit) of a kind of appliance starting fender guard for electronlmobil of the present invention;
Fig. 2 is the circuit theory schematic diagram one (monitor main current-limiting resistance whether overcurrent) of a kind of appliance starting fender guard for electronlmobil of the present invention;
Fig. 3 is the circuit theory schematic diagram three (whether monitor main current-limiting resistance opens circuit and overcurrent simultaneously) of a kind of appliance starting fender guard for electronlmobil of the present invention.
In figure: 1, mouth 2, load end 3, isolation end.
The specific embodiment
Below in conjunction with drawings and Examples, technical scheme of the present invention is described in further detail.
A kind of appliance starting fender guard for electronlmobil as shown in Figure 1, comprises and starts loop and the protection loop in parallel with starting loop, wherein:
Start loop comprise input end 1, load end 2 and be placed in input end and load end between main current-limiting resistance, input end 1 is connected with electrokinetic cell, and load end 2 is connected with power electric component;
Can there be following three kinds of forms in protection loop:
The protection loop of the first form is damage determination circuit as shown in Figure 1, damaging determination circuit is that damage is judged between resistance access input end 1 and load end 2, and damage and judge that the resistance value of resistance is far longer than the resistance value of described main current-limiting resistance, the resistance value of general main current-limiting resistance is 20-200 Ω, and damage, judge that the resistance value of resistance can reach 1-4M Ω, because main current-limiting resistance and damage judge that resistance is as being connected in parallel and damaging and judge that resistance is greater than thousands of times of main current-limiting resistance resistances, when main current-limiting resistance is intact, resistance after two resistance equivalences in parallel approximates the resistance of main current-limiting resistance, when main current-limiting resistance damages, the resistance after two resistance equivalences in parallel approximates damages the resistance of judging resistance, therefore by the variation of resistance size, can judge whether main current-limiting resistance damages.
The protection loop of the second form is overcurrent backfeed loop as shown in Figure 2; overcurrent backfeed loop is Zener diode, optocoupler current-limiting resistance and the optocoupler being placed between input end 1 and load end 2; Zener diode, optocoupler current-limiting resistance and the light-emitting diode in optocoupler are connected successively; the isolation end of optocoupler is connected with the control system of electronlmobil, and control system is by the overcurrent whether of main current-limiting resistance described in protection monitor loop.
The protection loop of the third form as shown in Figure 3, is that above-mentioned damage determination circuit and overcurrent backfeed loop is integrated, and described damage determination circuit and described overcurrent backfeed loop are in parallel with described startup loop respectively; In this case, the workflow of appliance starting fender guard is as follows:
First, main current-limiting resistance is mainly the electric current passing through to load from battery starting loop energising moment restriction, thereby makes load terminal voltage reach gradually the effect that scheduled voltage plays semiconductor element in protective relay contact, load end electric capacity and load.The resistance of main current-limiting resistance looks application scenario from power and the different values of system requirements are different, and general resistance value is within the scope of 20-200 Ω, and power is within the scope of 30-100W.
Control system of electric automobile is in electrifying startup moment, whether main current-limiting resistance works in normality threshold will be monitored, once control system detects main current-limiting resistance overcurrent, control system can take the methods such as failure record, fault prompting or system re-power automatically to avoid the damage of the main current-limiting resistance that overcurrent causes by force, specifically, by regulating the breakdown reverse voltage value of Zener diode and the resistance of optocoupler current-limiting resistance in overcurrent backfeed loop that the alarm threshold value that overcurrent is reported to the police is set.When the magnitude of voltage at main current-limiting resistance two ends surpasses the threshold value of setting, Zener diode reverse breakdown, light-emitting diode conducting in optocoupler, the signal of isolation end is sent to control system, thus, whether control system can detect current-limiting resistance by overcurrent backfeed loop and in normal range, work.
Appliance starting fender guard of the present invention by by starting protection, damage to judge, three of overcurrent list Kuis independently at least two of subfunction to carry out function integrated; protected the power electrical equipment of electronlmobil, improved damage the maintenance efficiency of the vehicle failure causing because of main current-limiting resistance simultaneously.
As mentioned above, embodiments of the invention are explained, obviously, as long as do not depart from fact inventive point of the present invention and effect, the distortion that will be readily apparent to persons skilled in the art, within being all included in protection scope of the present invention yet.
Claims (6)
1. for an appliance starting fender guard for electronlmobil, it is characterized in that, comprise and start loop and protection loop, wherein:
Described startup loop comprises input end, load end and main current-limiting resistance, and described main current-limiting resistance is placed between described input end and described load end; Described input end is connected with electrokinetic cell, and described load end is connected with power electric component;
Described protection loop is in parallel with described startup loop.
2. the appliance starting fender guard for electronlmobil according to claim 1; it is characterized in that; described protection loop is for damaging determination circuit; resistance is judged in the damage that described damage determination circuit is placed between described input end and described load end, and described damage judges that the resistance value of resistance is greater than the resistance value of described main current-limiting resistance.
3. the appliance starting fender guard for electronlmobil according to claim 1; it is characterized in that; described protection loop is overcurrent backfeed loop; described overcurrent backfeed loop is Zener diode, optocoupler current-limiting resistance and the optocoupler being placed between described input end and described load end; described Zener diode, described optocoupler current-limiting resistance and the light-emitting diode in described optocoupler are connected successively; the isolation end of described optocoupler is connected with described control system, and described control system is by the overcurrent whether of main current-limiting resistance described in protection monitor loop.
4. the appliance starting fender guard for electronlmobil according to claim 1; it is characterized in that; described protection loop comprises damages determination circuit and overcurrent backfeed loop, and described damage determination circuit and described overcurrent backfeed loop are in parallel with described startup loop respectively, wherein:
Resistance is judged in the damage that described damage determination circuit is placed between described input end and described load end, and described damage judges that the resistance value of resistance is greater than the resistance value of described main current-limiting resistance;
Described overcurrent backfeed loop is Zener diode, optocoupler current-limiting resistance and the optocoupler being placed between described input end and described load end; described Zener diode, described optocoupler current-limiting resistance and the light-emitting diode in described optocoupler are connected successively; the isolation end of described optocoupler is connected with described control system, and whether described control system opens circuit by main current-limiting resistance described in protection monitor loop.
5. the appliance starting fender guard for electronlmobil according to claim 1, is characterized in that, the resistance value of described main current-limiting resistance is 20-200 Ω.
6. according to the appliance starting fender guard for electronlmobil described in claim 2 or 4, it is characterized in that, described damage judges that the resistance value of resistance is 1-4M Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410424697.5A CN104149627B (en) | 2014-08-26 | 2014-08-26 | A kind of appliance starting protection device for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410424697.5A CN104149627B (en) | 2014-08-26 | 2014-08-26 | A kind of appliance starting protection device for electric automobile |
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| Publication Number | Publication Date |
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| CN104149627A true CN104149627A (en) | 2014-11-19 |
| CN104149627B CN104149627B (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410424697.5A Active CN104149627B (en) | 2014-08-26 | 2014-08-26 | A kind of appliance starting protection device for electric automobile |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5635804A (en) * | 1994-10-03 | 1997-06-03 | Honda Giken Kogyo Kabushiki Kaisha | Power supply apparatus and method for an electric vehicle |
| US5877601A (en) * | 1996-04-26 | 1999-03-02 | Hitachi, Ltd. | Control system for electric vehicle and control method therefor in which an inverter relay is controlled at the time of its re-closing after being disconnected |
| CN202094799U (en) * | 2011-05-30 | 2011-12-28 | 广州键程汽车用品有限公司 | Automobile rectifier |
| CN202413466U (en) * | 2011-12-05 | 2012-09-05 | 郑州宇通客车股份有限公司 | High-voltage distribution box for pure electric vehicle |
| CN102904206A (en) * | 2012-11-12 | 2013-01-30 | 重庆长安汽车股份有限公司 | Precharging safety protection circuit and system thereof |
-
2014
- 2014-08-26 CN CN201410424697.5A patent/CN104149627B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5635804A (en) * | 1994-10-03 | 1997-06-03 | Honda Giken Kogyo Kabushiki Kaisha | Power supply apparatus and method for an electric vehicle |
| US5877601A (en) * | 1996-04-26 | 1999-03-02 | Hitachi, Ltd. | Control system for electric vehicle and control method therefor in which an inverter relay is controlled at the time of its re-closing after being disconnected |
| CN202094799U (en) * | 2011-05-30 | 2011-12-28 | 广州键程汽车用品有限公司 | Automobile rectifier |
| CN202413466U (en) * | 2011-12-05 | 2012-09-05 | 郑州宇通客车股份有限公司 | High-voltage distribution box for pure electric vehicle |
| CN102904206A (en) * | 2012-11-12 | 2013-01-30 | 重庆长安汽车股份有限公司 | Precharging safety protection circuit and system thereof |
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| Publication number | Publication date |
|---|---|
| CN104149627B (en) | 2016-11-23 |
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