CN102891470A - Vehicle circuit protection device and protection method of vehicle circuit - Google Patents
Vehicle circuit protection device and protection method of vehicle circuit Download PDFInfo
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- CN102891470A CN102891470A CN201210411935XA CN201210411935A CN102891470A CN 102891470 A CN102891470 A CN 102891470A CN 201210411935X A CN201210411935X A CN 201210411935XA CN 201210411935 A CN201210411935 A CN 201210411935A CN 102891470 A CN102891470 A CN 102891470A
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Abstract
A vehicle circuit protection device comprises a shell (1), a circuit sampling unit, a main control unit, a fixed bolt (10) and a safety piece (11), wherein the circuit sampling unit is arranged on a power line of a whole vehicle electrical equipment load (3), and the safety piece is normally connected with a storage battery (12), and can be used for supplying power for a whole vehicle by the fixed bolt (10). The vehicle circuit protection device is characterized by further comprising a relay (8) which is respectively connected with a main control chip (7) and the fixed bolt (10), wherein the current sampling unit is further respectively connected with the fixed bolt (10) and the main control chip, and the main control chip (7) can be used for collecting a switch signal of a starting switch (2) and a current signal of the current sampling unit so as to control the action of the relay (8).
Description
Technical field
The invention belongs to the automatic control technology field, relate to a kind of circuit protective device.
Background technology
On a lot of automobiles electromagnetic power-supply general switch or mechanical type battery main switch are housed now, its purpose all is that (short circuit, on fire etc.) can cut off the car load power supply when vehicle circuitry breaks down, avoids the malignant events generations such as car load burns, personal injury as far as possible.But existing battery main switch all needs the people to operate, can not automatically cut off the car load power supply in the very first time that fault occurs, spark is less when electrical equipment or the firm short circuit of circuit, smell is less, affect less, the driver is difficult in time find, it is late with the disconnection of car load power supply to operate electromagnetic power-supply general switch or mechanical type master switch after continuing short-circuit fire driver discovery again, gently then burns short dot parts on every side, if having the interior trims such as combustibles such as carpet will cause that car load burns around the short dot.The present vehicle circuitry report that the burns on fire end that appears in the newspapers repeatly.Current Transformer of the present invention gathers short circuit current, use the main control chip automatic control relay, short circuit current is amplified, shorten the short circuit response time, the very first time in short circuit is cut off the car load power supply automatically, automatically, in time cut off the function of car load power supply when making this device have the vehicle circuitry short circuit, the fail safe that has greatly improved car load.
Summary of the invention
The objective of the invention is to propose a kind of circuit protective device that can in time respond of automatic operation; this installs inner Current Transformer and detects whether short circuit; when short circuit, short circuit current is amplified; shorten the short circuit response time; automatically, cut off timely the car load power supply; mainly solve present master switch and all be manual operation and cut off the car load power supply, or the car insurance response time is slow, when short circuit, can not in time automatically cut off the car load power supply and the vehicle that the causes problem of catching fire.
The invention provides a kind of circuit protective device, comprise housing (1); Current sampling unit, it places on the power line of car load electric appliance load (3); Main control unit; Set bolt (10) and safety plate (11), wherein safety plate often is connected with storage battery (12), and be that car load electric appliance load (3) is powered by set bolt (10); Characterized by further comprising: relay (8), connect respectively main control chip (7) and set bolt (10), current sampling unit also links to each other with set bolt (10) and main control chip respectively;
Main control chip (7) gathers the switching signal of starting switch (2) and the current signal of current sampling unit moves with control relay (8).
Further, when car load electric appliance load (3) short circuit, current sampling unit collects abnormal signal and sends to main control chip (7), main control chip gathers the signal of starting switch (2) simultaneously, if starting switch (2) no signal and abnormal current signal have exceeded preset value, then main control chip (7) control relay (8) action, safety plate (11), set bolt (10), relay (8) contact and current-limiting resistance (9) form the loop over the ground, this loop produces short circuit current and makes in time fusing of safety plate (11), car load load outage; If main control chip (7) collects the signal of starting switch (2), then abnormal signal is the starting current signal, and main control chip this moment (7) still control relay (8) is failure to actuate.
Further, wherein the preferred current transformer of current sampling unit.
The present invention also provides a kind of guard method of automobile circuit, be applicable to a kind of circuit protective device, include main control chip (7), current sampling unit, and relay (8), set bolt (10) and safety plate (11), wherein safety plate often is connected with storage battery (12), and be car load electric appliance load (3) power supply by set bolt (10), described method comprises: the signal of main control chip collection current sampling unit and starting switch (2); Main control chip moves with control relay according to the signal that gathers, and makes safety plate fusing and realization load outage.
Further the method: starting switch (2) no signal and the abnormal current signal that collect when main control chip have exceeded preset value; Then main control chip (7) control relay adhesive makes safety plate fusing so that car load electric appliance load (3) outage.
Effective effect of the present invention is:
Automatically, in time cut off the function of car load power supply when making this device have the vehicle circuitry short circuit, the fail safe that has improved car load.
Description of drawings
Fig. 1 is circuit theory of the present invention and structural representation.
Embodiment
The present invention will be further described below in conjunction with embodiment.As shown in Figure 1:
A kind of circuit protective device, comprise housing (1), binding post (4), current transformer (5), power conversion chip (6), main control chip (7), relay (8), current-limiting resistance (9), set bolt (10), safety plate (11), wherein power conversion chip (6) provides voltage for main control chip (7), can be the voltage of 5V with the voltage transitions of 12V; Safety plate (11) often is connected with storage battery (12), and is connected with car load electric appliance load (3) by set bolt (10), binding post (4); The control termination main control chip (7) of relay (8), the tip side of relay (8) are connected and fixed respectively bolt (10) and current-limiting resistance (9), and by current-limiting resistance (9) ground connection; Connecting line between binding post (4) and the set bolt (10) passes current transformer (5);
Main control chip (7) is implemented automatically control to relay (8) after gathering switching signal summation current transformer (5) current signal of starting switch (2) under the support of software.
During normality: storage battery (12) is powered to car load electric appliance load (3) by safety plate (11), set bolt (10), current transformer (5) and binding post (4).Not adhesive of main control chip (7) control relay (8).
During short circuit: car load electric appliance load (3) is when being short-circuited, short circuit current is through current transformer (5), main control chip (7) collects the abnormal signal of current transformer (5), main control chip (7) compares this abnormal signal and the data that are set in advance in the software, and the signal of collection starting switch (2), if starting switch (2) no signal and abnormal signal have exceeded the data that are set in advance in the software, then main control chip (7) control relay (8) adhesive, safety plate (11), set bolt (10), relay (8) contact and current-limiting resistance (9) form the loop over the ground, this loop produces short circuit current and makes in time fusing of safety plate (11), and car load electric appliance load (3) is without electricity after safety plate (11) fusing; If main control chip (7) collects the signal of starting switch (2), then to set the abnormal signal of current transformer (5) in software be the starting current signal to main control chip (7), (this state is in order to distinguish short circuit current or normal starting current to the still not adhesive of control relay (8) of main control chip (7) this moment, because starting current is also very large, switch misoperation when avoiding starting).
Details in the concrete operations is as follows:
Under normal circumstances, storage battery (12) is powered to car load electric appliance load (3) by safety plate (11), set bolt (10), current transformer (5) and binding post (4).Not adhesive of main control chip (7) control relay (8).Car load electric appliance load (3) is when being short-circuited, short circuit current is through current transformer (5), main control chip (7) collects the abnormal signal of current transformer (5), main control chip (7) compares this abnormal signal and the data that are set in advance in the software, and the signal of collection starting switch (2), if starting switch (2) no signal and abnormal signal have exceeded the data that are set in advance in the software, then main control chip (7) control relay (8) adhesive, safety plate (11) forms short circuit over the ground, this short circuit current makes in time fusing of safety plate (11), and car load electric appliance load (3) is without electricity after safety plate (11) fusing.
Circuit protective device of the present invention has automatic detection automatic control function; short circuit current can be amplified; shorten the short circuit response time; can cut off the electricity supply in the very first time; solved well that existing master switch needs manual operation and delay time at stop or car insurance response time are slow; the problem that causes vehicle to catch fire, simple in structure, cost is low, and is suitable for large-scale promotion.
Claims (5)
1. a circuit protective device comprises housing (1); Current sampling unit, it places on the power line of car load electric appliance load (3); Main control chip; Set bolt (10) and safety plate (11), wherein safety plate often is connected with storage battery (12), and be that car load electric appliance load (3) is powered by set bolt (10); Characterized by further comprising: relay (8), connect respectively main control chip (7) and set bolt (10), current sampling unit also links to each other with set bolt (10) and main control chip respectively;
Main control chip (7) gathers the switching signal of starting switch (2) and the current signal of current sampling unit moves with control relay (8).
2. circuit protective device according to claim 1, when car load electric appliance load (3) short circuit, current sampling unit collects abnormal signal and sends to main control chip (7), main control chip gathers the signal of starting switch (2) simultaneously, if starting switch (2) no signal and abnormal current signal have exceeded preset value, then main control chip (7) control relay (8) action, safety plate (11), set bolt (10), relay (8) contact and current-limiting resistance (9) form the loop over the ground, large many of the short circuit current that produces during short-circuit current ratio car load electric appliance load (3) short circuit that this loop produces, to shorten the short circuit response time, make in time fusing of safety plate (11), the outage of car load electric appliance load; If main control chip (7) collects the signal of starting switch (2), then abnormal signal is the starting current signal, and main control chip this moment (7) still control relay (8) is failure to actuate.
3. circuit protective device according to claim 1, current sampling unit wherein is current transformer.
4. the guard method of an automobile circuit; be applicable to a kind of circuit protective device; include main control chip (7); current sampling unit; and relay (8), set bolt (10) and safety plate (11), wherein safety plate often is connected with storage battery (12); and be that car load electric appliance load (3) is powered by set bolt (10), described method comprises:
Main control chip gathers the signal of current sampling unit and starting switch (2);
Main control chip moves with control relay according to the signal that gathers, and makes safety plate fusing and realization load outage.
5. the guard method of automobile circuit according to claim 4 is characterized in that,
Starting switch (2) no signal and the abnormal current signal that collect when main control chip have exceeded preset value;
Then main control chip (7) control relay adhesive makes safety plate fusing so that car load electric appliance load (3) outage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210411935.XA CN102891470B (en) | 2012-10-24 | 2012-10-24 | Vehicle circuit protection device and protection method of vehicle circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210411935.XA CN102891470B (en) | 2012-10-24 | 2012-10-24 | Vehicle circuit protection device and protection method of vehicle circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102891470A true CN102891470A (en) | 2013-01-23 |
| CN102891470B CN102891470B (en) | 2015-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210411935.XA Active CN102891470B (en) | 2012-10-24 | 2012-10-24 | Vehicle circuit protection device and protection method of vehicle circuit |
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| CN (1) | CN102891470B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020097543A1 (en) * | 2001-01-25 | 2002-07-25 | Dialog Semiconductor Gmbh | Charge/discharge protection circuit for a rechargeable battery |
| CN1972066A (en) * | 2005-11-23 | 2007-05-30 | 明基电通股份有限公司 | Charging protection circuit |
| CN1976156A (en) * | 2005-11-10 | 2007-06-06 | 力特保险丝有限公司 | Self-repairing circuit protection apparatus |
| CN202004422U (en) * | 2011-04-21 | 2011-10-05 | 李海兵 | Fireproof automatic breaker for automobiles |
| CN202888787U (en) * | 2012-10-24 | 2013-04-17 | 安徽江淮汽车股份有限公司 | Automobile circuit protection device |
-
2012
- 2012-10-24 CN CN201210411935.XA patent/CN102891470B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020097543A1 (en) * | 2001-01-25 | 2002-07-25 | Dialog Semiconductor Gmbh | Charge/discharge protection circuit for a rechargeable battery |
| CN1976156A (en) * | 2005-11-10 | 2007-06-06 | 力特保险丝有限公司 | Self-repairing circuit protection apparatus |
| CN1972066A (en) * | 2005-11-23 | 2007-05-30 | 明基电通股份有限公司 | Charging protection circuit |
| CN202004422U (en) * | 2011-04-21 | 2011-10-05 | 李海兵 | Fireproof automatic breaker for automobiles |
| CN202888787U (en) * | 2012-10-24 | 2013-04-17 | 安徽江淮汽车股份有限公司 | Automobile circuit protection device |
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| Publication number | Publication date |
|---|---|
| CN102891470B (en) | 2015-03-04 |
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Address after: Hefei City, Anhui Province, 230022 East Road No. 176 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: Hefei City, Anhui Province, 230022 East Road No. 176 Patentee before: Anhui Jianghuai Automobile Co., Ltd. |
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Address after: 230601 No. 99 Ziyun Road, Hefei Economic and Technological Development Zone, Anhui Province Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230022 No. 176 Dongliu Road, Hefei City, Anhui Province Patentee before: Anhui Jianghuai Automobile Group Limited by Share Ltd |
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