CN102903580A - Normally-closed type power supply main switch device and automatic power off method of automatic short circuit - Google Patents
Normally-closed type power supply main switch device and automatic power off method of automatic short circuit Download PDFInfo
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- CN102903580A CN102903580A CN2012104102518A CN201210410251A CN102903580A CN 102903580 A CN102903580 A CN 102903580A CN 2012104102518 A CN2012104102518 A CN 2012104102518A CN 201210410251 A CN201210410251 A CN 201210410251A CN 102903580 A CN102903580 A CN 102903580A
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Abstract
The invention relates to a normally-closed type power supply main switch device which comprises a shell (1), a current sampling unit connected with an integral load, a main control chip (7), a movable contact (9) and a static contact (10), wherein a magnetic coil (13) is wound on an iron core (15) and a steel column (14), and the magnetic coil (13) is supplied with power by a storage battery (12). The normally-closed type power supply main switch device is characterized by also comprising switch parts respectively connected with the magnetic coil (13) and the main control chip (7); the current sampling unit is respectively connected with the static contact and the main control chip; and the main control chip (7) collects a signal of a start switch (2) and a current signal of the current sampling unit for controlling the switch parts.
Description
Technical field
The invention belongs to the automatic control technology field, relate to a kind of closed type battery main switch device.
Background technology
The battery main switch of automobile is divided into electromagnetic type and mechanical type, and electromagnetic type is that control switch is connected the solenoid loop, utilizes electromagnetic attraction that moving contact is connected with fixed contact, thereby with car load electric appliance load and car load power connection; Mechanical type is connected the car load power supply for manpower operating switch handle moving contact being connected with fixed contact.No matter be electromagnetic type or mechanical type battery main switch, its purpose all is that (short circuit, on fire etc.) can cut off the car load power supply when vehicle circuitry breaks down, and avoids the malignant events such as car load burns, personal injury to occur 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, with main control chip automatic control electric magnetic coil, thereby the very first time in short circuit is cut off the car load power supply automatically, automatically cuts off the function of car load power supply when making battery main switch 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 closed type battery main switch of automatic operation, whether short circuit is detected with current sampling unit in this switch inside, when short circuit, automatically cut off the car load power supply, mainly solve present master switch and all be manual operation and cut off the car load power supply, 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 closed type battery main switch device, comprise housing (1); Current sampling unit is connected with the car load load; Main control chip (7); Moving contact (9) and fixed contact (10); Solenoid (13) is wrapped on iron core (15) and the steel column (14), and wherein said solenoid (13) is by storage battery (12) power supply, and it is characterized in that: also comprise switch block, with solenoid (13), main control chip (7) is connected respectively; Current sampling unit also links to each other with fixed contact and main control chip respectively;
The signal of main control chip (7) collection starting switch (2) and the current signal of current sampling unit are with the control switch parts.
Further the present invention also comprises spring 11, and the elastic force of spring is connected dynamic and static contact, storage battery by dynamic and static contact and current sampling unit to the car load load supplying.
Further, when load short circuits, 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 the conducting of main control chip (7) control switch parts is connected solenoid (13) loop and is produced electromagnetic attraction, steel column (14) drives moving contact (9) and moves downward, moving contact (9) and fixed contact (10) disconnect, car load electric appliance load (3) outage; If main control chip (7) collects the signal of starting switch (2), then main control chip (7) judges that this abnormal signal is the starting current signal, and main control chip this moment (7) still control switch parts remains open and is failure to actuate.
Further, switch block is metal-oxide-semiconductor preferably, and metal-oxide-semiconductor (8) drain electrode is connected 13 with solenoid) the control end connection; Metal-oxide-semiconductor (8) source electrode is connected 12 with storage battery) negative pole connect; The metal-oxide-semiconductor grid is connected 7 with main control chip) connect.Further, switch block transistor preferably.
Further, wherein current sampling unit current transformer preferably.
In addition, the present invention also provides a kind of automatic power off method of automobile short circuit, is applicable to a kind of closed type power switch device, includes main control chip (7), current sampling unit, and switch block,
Main control chip gathers the signal of current sampling unit and starting switch (2); Main control chip disconnects the sound contact according to the signal that gathers with the control switch parts and realizes the load outage.
Effective effect of the present invention is:
Automatically cut off the function of car load power supply when making battery main switch 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 closed type battery main switch device, comprise housing (1), binding post (4), current transformer (5), power conversion chip (6), main control chip (7), metal-oxide-semiconductor (8), moving contact (9), fixed contact (10), spring (11), storage battery (12), solenoid (13), steel column (14), iron core (15), wherein power conversion chip (6) provides voltage for main control chip (7), can be the voltage of 5V with the voltage transitions of 12V, metal-oxide-semiconductor (8) drain electrode be connected 13 with solenoid) the control end connection; Metal-oxide-semiconductor (8) source electrode is connected 12 with storage battery) negative pole connect; The metal-oxide-semiconductor grid is connected 7 with main control chip) connect; Solenoid (13) power end often is connected with storage battery (12) positive pole; Solenoid (13) is wrapped on the iron core (15); Connecting line between binding post (4) and the fixed contact (10) passes current transformer (5);
Main control chip (7) is implemented automatically control to metal-oxide-semiconductor (8) after gathering switching signal summation current transformer (5) current signal of starting switch (2) under the support of software.
During normality: the pulling force of spring (11) is connected 10 with moving contact (9) with fixed contact) connect, storage battery (12) is powered to car load electric appliance load (3) by moving contact (9), fixed contact (10), current transformer (5) and binding post (4).Main control chip (7) control metal-oxide-semiconductor (8) cut-off, solenoid (13) opens circuit.
During short-circuit protection: 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 metal-oxide-semiconductor (8) conducting, solenoid (13) loop is connected and is produced electromagnetic attraction, steel column (14) drives moving contact (9) and moves downward, moving contact (9) and fixed contact (10) disconnect, and car load electric appliance load (3) is without electricity; 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), main control chip this moment (7) is still controlled metal-oxide-semiconductor (8) cut-off, solenoid (13) still opens circuit, spring (11) is kept moving contact (9) and is connected 10 with fixed contact) connection (this state is in order to distinguish short circuit current or normal starting current, because starting current is also very large, switch misoperation when avoiding starting).
Further concrete operation is as follows:
Under normal circumstances, under the pulling force effect of spring (11), moving contact (9) is connected 10 with fixed contact) connect, storage battery (12) is powered to car load electric appliance load (3) by moving contact (9), fixed contact (10), current transformer (5) and binding post (4).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 metal-oxide-semiconductor (8) conducting, solenoid (13) loop is connected and is produced electromagnetic attraction, steel column (14) drives moving contact (9) and moves downward, moving contact (9) and fixed contact (10) disconnect, car load electric appliance load (3) outage.
Battery main switch of the present invention has automatic detection automatic control function, can cut off the electricity supply in the very first time, has solved well that existing master switch needs manual operation and problem that the delay time at stop causes vehicle to catch fire, and is simple in structure suitable for large-scale promotion.
Claims (8)
1. a closed type battery main switch device comprises housing (1); Current sampling unit is connected with the car load load; Main control chip (7); Moving contact (9) and fixed contact (10); Solenoid (13) is wrapped on iron core (15) and the steel column (14), and wherein said solenoid (13) be is characterized in that: also comprise switch block, be connected with solenoid (13), main control chip (7) respectively by storage battery (12) power supply; Current sampling unit also links to each other with fixed contact and main control chip respectively;
The signal of main control chip (7) collection starting switch (2) and the current signal of current sampling unit are with the control switch parts.
2. switching device according to claim 1 also comprises spring (11), and the elastic force of spring is connected dynamic and static contact, storage battery by dynamic and static contact and current sampling unit to the car load load supplying.
3. switching device according to claim 1, when load short circuits, 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 the conducting of main control chip (7) control switch parts is connected solenoid (13) loop and is produced electromagnetic attraction, steel column (14) drives moving contact (9) and moves downward, moving contact (9) and fixed contact (10) disconnect, car load electric appliance load (3) outage; If main control chip (7) collects the signal of starting switch (2), then main control chip (7) judges that this abnormal signal is the starting current signal, and main control chip this moment (7) still control switch parts remains open and is failure to actuate.
4. switching device according to claim 1, switch block wherein is metal-oxide-semiconductor, metal-oxide-semiconductor (8) drain electrode is connected 13 with solenoid) the control end connection; Metal-oxide-semiconductor (8) source electrode is connected 12 with storage battery) negative pole connect; The metal-oxide-semiconductor grid is connected 7 with main control chip) connect.
5. switching device according to claim 1, current sampling unit wherein is current transformer.
6. switching device according to claim 1, switch block wherein is transistor.
7. the automatic power off method of an automobile short circuit is applicable to a kind of closed type power switch device, includes main control chip (7), current sampling unit, and switch block,
Main control chip gathers the signal of current sampling unit and starting switch (2);
Main control chip disconnects the sound contact according to the signal that gathers with the control switch parts and realizes the load outage.
8. the automatic power off method of automobile short circuit according to claim 7 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 the conducting of main control chip (7) control switch parts is connected solenoid (13) loop and is produced electromagnetic attraction, steel column (14) drives moving contact (9) and moves downward, moving contact (9) and fixed contact (10) disconnect, car load electric appliance load (3) outage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210410251.8A CN102903580B (en) | 2012-10-24 | 2012-10-24 | Normally-closed type power supply main switch device and automatic power off method of automatic short circuit |
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| CN201210410251.8A CN102903580B (en) | 2012-10-24 | 2012-10-24 | Normally-closed type power supply main switch device and automatic power off method of automatic short circuit |
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| CN102903580A true CN102903580A (en) | 2013-01-30 |
| CN102903580B CN102903580B (en) | 2015-06-10 |
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| CN201210410251.8A Active CN102903580B (en) | 2012-10-24 | 2012-10-24 | Normally-closed type power supply main switch device and automatic power off method of automatic short circuit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104091703A (en) * | 2014-07-17 | 2014-10-08 | 安徽江淮汽车股份有限公司 | Main switch of automotive power supply |
| WO2019197459A3 (en) * | 2018-04-10 | 2020-02-06 | Eaton Intelligent Power Limited | System, method, and apparatus for power distribution in an electric mobile application using a combined breaker and relay |
| US11050241B2 (en) | 2017-11-08 | 2021-06-29 | Eaton Intelligent Power Limited | Active current injection through a fuse for an electric mobile application |
| US11052784B2 (en) | 2017-11-08 | 2021-07-06 | Eaton Intelligent Power Limited | Power distribution unit and fuse management for an electric mobile application |
| US11108225B2 (en) | 2017-11-08 | 2021-08-31 | Eaton Intelligent Power Limited | System, method, and apparatus for power distribution in an electric mobile application using a combined breaker and relay |
| US11368031B2 (en) | 2017-11-08 | 2022-06-21 | Eaton Intelligent Power Limited | Power distribution and circuit protection for a mobile application having a high efficiency inverter |
| WO2023010530A1 (en) * | 2021-08-06 | 2023-02-09 | 深圳市华思旭科技有限公司 | Protection circuit, starting power supply device, and battery clip device |
| US11670937B2 (en) | 2019-02-22 | 2023-06-06 | Eaton Intelligent Power Limited | Coolant connector having a chamfered lip and fir tree axially aligned with at least one o-ring |
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| CN104091703A (en) * | 2014-07-17 | 2014-10-08 | 安徽江淮汽车股份有限公司 | Main switch of automotive power supply |
| CN104091703B (en) * | 2014-07-17 | 2015-12-30 | 安徽江淮汽车股份有限公司 | A kind of main switch for car power source |
| US11128124B2 (en) | 2017-11-08 | 2021-09-21 | Eaton Intelligent Power Limited | System, method, and apparatus for power distribution in an electric mobile application during run time using configurable electrical interface ports |
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| CN102903580B (en) | 2015-06-10 |
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Inventor after: Wang Yihai Inventor after: Li Xia Inventor after: Hu Die Inventor after: Han Yong Inventor after: Cai Min Inventor before: Wang Yihai Inventor before: Han Yong Inventor before: Cai Min Inventor before: Zhou Jimao Inventor before: Wang Mingming |
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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 |