CN101567651A - Electrical safety circuit in electric automobile - Google Patents
Electrical safety circuit in electric automobile Download PDFInfo
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- CN101567651A CN101567651A CNA2008100942958A CN200810094295A CN101567651A CN 101567651 A CN101567651 A CN 101567651A CN A2008100942958 A CNA2008100942958 A CN A2008100942958A CN 200810094295 A CN200810094295 A CN 200810094295A CN 101567651 A CN101567651 A CN 101567651A
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Abstract
The invention discloses an electrical safety circuit in an electric automobile. In the invention, a first solid-state relay controls the control end of an energizing delay relay and the control end of a second solid-state relay to be connected with a low-voltage power supply; at the same time, a normally closed contact and a normally open contact of the energizing delay relay are still in original states, and the second solid-state relay immediately controls the positive electrode of a high-voltage power supply to be connected with the normally closed contact of the energizing delay relay through a second fuse, thus the current from the positive electrode of the high-voltage power supply charges a filter capacitor through a charging resistor; after pre-set time intervals, the normally closed contact of the energizing delay relay is switched off, the normally open contact of the energizing delay relay is switched on, the filter capacitor stops charging, the high-voltage power supply directly transfers current to the positive electrode of a motor controller, and thus, the voltage at both ends of the motor controller rises step by step rather than achieves the maximum value immediately through the charging process of the filter capacitor. The damage of a motor caused by larger starting current is avoided, and the reliability of electrical safety protection is improved.
Description
Technical field
The present invention relates to the electrical safety technology, the electrical safety circuit in particularly a kind of electric automobile.
Background technology
Owing to have the higher a plurality of power parts of rated voltage in the pure electric automobile, thereby need the design electrical safety circuit that the power part of each high pressure is carried out safeguard protection.
Fig. 1 is the structural representation of the electrical safety circuit in existing a kind of electric automobile.As shown in Figure 1, this electrical safety circuit comprises: the first solid-state relay Y1, the first D.C. contactor Y2 and the first fuse RD1.
The first solid-state relay Y1, its normally opened contact is closure when the conducting of igniting lock core, controls the anodal conducting of control end and the low tension battery of the first D.C. contactor Y2.Wherein, low tension battery can be regarded low-tension supply as, its minus earth.
The first D.C. contactor Y2, its normally opened contact is closure when the anodal conducting of its control end and low tension battery, and the positive pole of control high voltage power battery is by the anodal conducting of the first fuse RD1 and electric machine controller.Wherein, the high voltage power battery is regarded high voltage source as, and negative pole links to each other with the negative pole of electric machine controller.
Need to prove that above-mentioned low pressure is meant any value in the range of nominal tension that satisfies low-voltage component operate as normal such as relay, for example 12V; Above-mentioned high pressure then is meant any value in the range of nominal tension that satisfies electric powered motor parts operate as normal, for example 288V.
Like this, the positive pole of electric machine controller and the voltage U a between the negative pole equal the voltage at high voltage power battery two ends, thus the running of starter motor.
In the above-mentioned electrical safety circuit; though the first fuse RD1 can play the effect of overcurrent protection, because when the input of relay Y2 and output are switched on; electric machine controller can receive immediately from the high voltage power battery than great start-up current, thereby bring damage to motor.And above-mentioned electrical safety circuit is only realized the safeguard protection to electric machine controller, and for the air-conditioning in the electric automobile, direct current (DC)/other high voltage power parts such as DC transducer, does not play any safeguard protection effect.
As seen, the electrical safety circuit in the existing electric automobile can damage motor, makes that the reliability of electric security protector is not high.
Summary of the invention
In view of this, the invention provides the electrical safety circuit in a kind of electric automobile, can improve the reliability of electric security protector.
Electrical safety circuit in a kind of electric automobile provided by the invention comprises: first solid-state relay, first D.C. contactor and first fuse, wherein,
Described electrical safety circuit also comprises: energization delay relay, second solid-state relay, second fuse, charging resistor, filter capacitor;
Described first solid-state relay, its normally opened contact is closure when the conducting of igniting lock core, controls the control end and the low-tension supply conducting of described energization delay relay and described second solid-state relay;
Described energization delay relay has a normally-closed contact and a normally opened contact, and when its control end and described low-tension supply conducting, normally-closed contact disconnects and the normally opened contact closure after the time interval that wait is preset;
Described normally-closed contact two ends connect the normally opened contact and the described charging resistor of described second solid-state relay respectively, during by described second fuse and its conducting, described high voltage source is charged to described filter capacitor by described charging resistor at the positive pole of its closure and high voltage source; The two ends of described filter capacitor link to each other with negative pole with the positive pole of the first high voltage power parts respectively;
Described normally opened contact two ends connect the control end of described low-tension supply and described first D.C. contactor respectively, control the control end and the described low-tension supply conducting of described first D.C. contactor when it is closed;
Described second solid-state relay, its normally opened contact is closure when its control end and described low-tension supply conducting, controls the normally-closed contact conducting of the positive pole of described high voltage source by described second fuse and described energization delay relay;
Described first D.C. contactor, its normally opened contact is closure when its control end and described low-tension supply conducting, and the positive pole of control high voltage source is by the anodal conducting of described first fuse and the described first high voltage power parts; The negative pole of described high voltage source links to each other with the negative pole of the described first high voltage power parts.
This circuit further comprises: second D.C. contactor, the 3rd fuse and the 4th fuse, wherein,
Described first solid-state relay, its normally opened contact is closure when the conducting of igniting lock core, further controls the control end and the described low-tension supply conducting of described second D.C. contactor;
Described second D.C. contactor, two normally opened contact is closure when its control end and described low-tension supply conducting, controls the anodal conducting of the positive pole of described high voltage source by described the 3rd fuse and the second high voltage power parts, the anodal conducting by described the 4th fuse and the 3rd high voltage power parts respectively; The negative pole of described second high voltage power parts and described the 3rd high voltage power parts all links to each other with the negative pole of described high voltage source.
Described low-tension supply is a low tension battery;
Described high voltage source is the high voltage power battery.
The described first high voltage power parts are electric machine controller;
The described second high voltage power parts are air-conditioning;
Described the 3rd high voltage power parts are direct current DC/DC transducer.
As seen from the above technical solution, the present invention is when the conducting of igniting lock core, first solid-state relay promptly can be controlled the control end and the low-tension supply conducting of the energization delay relay and second solid-state relay, at this moment, normally closed and the normally opened contact of energization delay relay still maintains the original state, the positive pole that second solid-state relay is then controlled high voltage source immediately is by the normally-closed contact conducting of second fuse with energization delay relay, thereby feasible electric current from high-voltage power cathode charges to filter capacitor via second fuse and charging resistor; Behind the Preset Time interval; the normally-closed contact of energization delay relay disconnects, the normally opened contact closure; make that filter capacitor stops to charge, directly carrying electric current by first fuse to the positive pole of electric machine controller by high voltage source; thereby the charging process by filter capacitor makes the voltage at electric machine controller two ends progressively rise rather than reaches maximum immediately; avoid motor because bigger starting current and impaired, and then improved the reliability of electric security protector.
And the electrical safety circuit among the present invention also can be set up second solid-state relay and corresponding fuse, thereby can realize the electric security protector to a plurality of high voltage power parts.
Description of drawings
Fig. 1 is the structural representation of the electrical safety circuit in existing a kind of electric automobile.
Fig. 2 is the structural representation of electrical safety circuit in the embodiment of the invention one.
Fig. 3 is the structural representation of electrical safety circuit in the embodiment of the invention two.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Fig. 2 is the structural representation of electrical safety circuit in the embodiment of the invention one.As shown in Figure 2, with the low-tension supply be low tension battery (for example, the 12V storage battery), high voltage source is that high voltage power battery (for example 288V electrokinetic cell) is example, electrical safety circuit in the present embodiment comprise with Fig. 1 in the identical first solid-state relay Y1, the first D.C. contactor Y2 and the first fuse RD1, and also comprise energization delay relay Y3, the second solid-state relay Y4, the second fuse RD2, charging resistor Rc, the filter capacitor Cd that is different from Fig. 1.
The first solid-state relay Y1, its normally opened contact is closure when the conducting of igniting lock core, control energization delay relay Y3 and the control end of the second solid-state relay Y4 and the anodal conducting of low tension battery.Wherein, the minus earth of low tension battery.
Energization delay relay Y3 has a normally-closed contact and a normally opened contact, and when the anodal conducting of its control end and low tension battery, normally-closed contact disconnects and the normally opened contact closure after the time interval that wait is earlier preset.
The normally-closed contact two ends of energization delay relay Y3 connect normally opened contact and the charging resistor Rc of the second solid-state relay Y4 respectively, when the positive pole of its closure and high voltage power battery passed through the second fuse RD2 and its conducting, the positive pole of high voltage power battery charged to filter capacitor Cd by charging resistor Rc; The two ends of filter capacitor Cd link to each other with negative pole with the positive pole of electric machine controller respectively.
The normally opened contact two ends of energization delay relay Y3 connect the positive pole of low tension battery and the control end of the first D.C. contactor Y2 respectively, control the anodal conducting of control end and the low tension battery of the first D.C. contactor Y2 when it is closed.
Relay Y4, its normally opened contact is closure when the anodal conducting of its control end and low tension battery, and the positive pole of control high voltage power battery is by the normally-closed contact conducting of the second fuse RD2 and energization delay relay Y3.
The first D.C. contactor Y2, it is often opened and touches closure when the anodal conducting of its control end and low tension battery, and the positive pole of control high voltage power battery is by the anodal conducting of the first fuse RD1 and electric machine controller; The negative pole of high voltage power battery links to each other with the negative pole of electric machine controller.
Like this, when the conducting of igniting lock core, the first solid-state relay Y1 promptly can control the anodal conducting of control end and the low tension battery of the energization delay relay Y3 and the second solid-state relay Y4, at this moment, normally closed and the normally opened contact of energization delay relay Y3 still maintains the original state, the positive pole that the second solid-state relay Y4 then controls the high voltage power battery immediately is by the normally-closed contact conducting of the second fuse RD2 with energization delay relay Y3, thereby the electric current of feasible positive pole from the high voltage power battery charges to filter capacitor Cd via the second fuse RD2 and charging resistor Rc; Behind the Preset Time interval, the normally-closed contact of energization delay relay Y3 disconnects, the normally opened contact closure, makes that filter capacitor Cd stops to charge, directly carrying electric current by the first fuse RD1 to the positive pole of electric machine controller by the positive pole of high voltage power battery.
As seen, the charging process of foregoing circuit by filter capacitor Cd make the voltage U a at electric machine controller two ends progressively rise rather than reach maximum immediately, thereby avoided motor because bigger starting current and impaired.And after directly by the high voltage power powered battery, filter capacitor Cd can also carry out filtering to electric current, to guarantee the stability of electric machine controller both end voltage Ua, further improves the reliability of electric security protector.
Fig. 3 is the structural representation of electrical safety circuit in the embodiment of the invention two.As shown in Figure 3, electrical safety circuit in the present embodiment also comprises except comprising structure as shown in Figure 2: the second D.C. contactor Y5, the 3rd fuse RD3 and the 4th fuse RD4.
The first solid-state relay Y1, its normally opened contact is closure when the conducting of igniting lock core, also controls the anodal conducting of control end and the low tension battery of the second D.C. contactor Y5.
The second D.C. contactor Y5, two normally opened contact is closure when the anodal conducting of its control end and low tension battery all, control the positive pole of high voltage power battery respectively by the anodal conducting of the 3rd fuse RD3 and air-conditioning, by the anodal conducting of the 4th fuse RD4 and DC/DC transducer, realize start-up control air-conditioning and DC/DC transducer.Wherein, the negative pole of air-conditioning and DC/DC transducer all links to each other with the negative pole of high voltage power battery.
As seen, the electrical safety circuit in the present embodiment has also been realized the electric security protector to other high voltage power parts in the electric automobile except realizing the safeguard protection to electric machine controller.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1, the electrical safety circuit in a kind of electric automobile comprises: first solid-state relay, first D.C. contactor and first fuse, wherein,
It is characterized in that,
Described electrical safety circuit also comprises: energization delay relay, second solid-state relay, second fuse, charging resistor, filter capacitor;
Described first solid-state relay, its normally opened contact is closure when the conducting of igniting lock core, controls the control end and the low-tension supply conducting of described energization delay relay and described second solid-state relay;
Described energization delay relay has a normally-closed contact and a normally opened contact, and when its control end and described low-tension supply conducting, normally-closed contact disconnects and the normally opened contact closure after the time interval that wait is preset;
Described normally-closed contact two ends connect the normally opened contact and the described charging resistor of described second solid-state relay respectively, during by described second fuse and its conducting, described high voltage source is charged to described filter capacitor by described charging resistor at the positive pole of its closure and high voltage source; The two ends of described filter capacitor link to each other with negative pole with the positive pole of the first high voltage power parts respectively;
Described normally opened contact two ends connect the control end of described low-tension supply and described first D.C. contactor respectively, control the control end and the described low-tension supply conducting of described first D.C. contactor when it is closed;
Described second solid-state relay, its normally opened contact is closure when its control end and described low-tension supply conducting, controls the normally-closed contact conducting of the positive pole of described high voltage source by described second fuse and described energization delay relay;
Described first D.C. contactor, its normally opened contact is closure when its control end and described low-tension supply conducting, and the positive pole of control high voltage source is by the anodal conducting of described first fuse and the described first high voltage power parts; The negative pole of described high voltage source links to each other with the negative pole of the described first high voltage power parts.
2, electrical safety circuit as claimed in claim 1 is characterized in that, this circuit further comprises: second D.C. contactor, the 3rd fuse and the 4th fuse, wherein,
Described first solid-state relay, its normally opened contact is closure when the conducting of igniting lock core, further controls the control end and the described low-tension supply conducting of described second D.C. contactor;
Described second D.C. contactor, two normally opened contact is closure when its control end and described low-tension supply conducting, controls the anodal conducting of the positive pole of described high voltage source by described the 3rd fuse and the second high voltage power parts, the anodal conducting by described the 4th fuse and the 3rd high voltage power parts respectively; The negative pole of described second high voltage power parts and described the 3rd high voltage power parts all links to each other with the negative pole of described high voltage source.
3, electrical safety circuit as claimed in claim 1 or 2 is characterized in that,
Described low-tension supply is a low tension battery;
Described high voltage source is the high voltage power battery.
4, electrical safety circuit as claimed in claim 3 is characterized in that,
The described first high voltage power parts are electric machine controller;
The described second high voltage power parts are air-conditioning;
Described the 3rd high voltage power parts are direct current DC/DC transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100942958A CN101567651B (en) | 2008-04-25 | 2008-04-25 | Electrical safety circuit in electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100942958A CN101567651B (en) | 2008-04-25 | 2008-04-25 | Electrical safety circuit in electric automobile |
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| CN101567651A true CN101567651A (en) | 2009-10-28 |
| CN101567651B CN101567651B (en) | 2010-09-15 |
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| CN2008100942958A Active CN101567651B (en) | 2008-04-25 | 2008-04-25 | Electrical safety circuit in electric automobile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201178A (en) * | 2010-03-23 | 2011-09-28 | 上海宝钢汽车检测修复有限公司 | Analog manipulation and control module for electrically driven vehicle |
| CN110857032A (en) * | 2018-08-24 | 2020-03-03 | 广州汽车集团股份有限公司 | Vehicle emergency power-off system and vehicle |
| CN112054790A (en) * | 2020-09-10 | 2020-12-08 | 湖南三一中型起重机械有限公司 | Time delay switch device, power supply system and control method of time delay switch device |
-
2008
- 2008-04-25 CN CN2008100942958A patent/CN101567651B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201178A (en) * | 2010-03-23 | 2011-09-28 | 上海宝钢汽车检测修复有限公司 | Analog manipulation and control module for electrically driven vehicle |
| CN102201178B (en) * | 2010-03-23 | 2013-03-27 | 上海宝钢汽车检测修复有限公司 | Analog manipulation and control module for electrically driven vehicle |
| CN110857032A (en) * | 2018-08-24 | 2020-03-03 | 广州汽车集团股份有限公司 | Vehicle emergency power-off system and vehicle |
| CN112054790A (en) * | 2020-09-10 | 2020-12-08 | 湖南三一中型起重机械有限公司 | Time delay switch device, power supply system and control method of time delay switch device |
| CN112054790B (en) * | 2020-09-10 | 2023-10-31 | 湖南三一中型起重机械有限公司 | Time delay switching device, power supply system and control method of time delay switching device |
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| CN101567651B (en) | 2010-09-15 |
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Effective date of registration: 20190829 Address after: 450016 Zhengzhou economic and Technological Development Zone, Henan Road, No. 1689 Patentee after: Hippocampus Motor Co., Ltd. Address before: 201201 Shanghai, East long avenue, No. 6111, Pudong New Area Road intersection Patentee before: Shanghai Haima Automobile Co., Ltd. |
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