CN102903580B - 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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- CN102903580B CN102903580B CN201210410251.8A CN201210410251A CN102903580B CN 102903580 B CN102903580 B CN 102903580B CN 201210410251 A CN201210410251 A CN 201210410251A CN 102903580 B CN102903580 B CN 102903580B
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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 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 solenoid loop connected by control switch, utilizes electromagnetic attraction to be connected with fixed contact by moving contact, thus car load electric appliance load and car load power supply is connected; Mechanical type, for be connected with fixed contact by moving contact with manpower operating switch handle, connects car load power supply.No matter be electromagnetic type or mechanical type battery main switch, its object is all that (short circuit, on fire etc.) can cut off car load power supply when vehicle circuitry breaks down, and avoids car load to burn as far as possible, the malignant event such as personal injury occurs.But existing battery main switch all needs people to operate, the very first time that can not occur in fault cuts off car load power supply automatically, when electrical equipment or circuit firm short circuit, spark is less, smell is less, affect less, driver is difficult to Timeliness coverage, after continuation short-circuit fire driver finds, operate electromagnetic power-supply general switch again or car load power supply disconnects late by mechanical type master switch, gently then burn short dot peripheral parts, if there are combustibles such as the interior trims such as carpet that car load will be caused to burn around short dot.The present vehicle circuitry report burnt on fire appears in the newspapers end repeatly.Current Transformer of the present invention gathers short circuit current, with main control chip automatic control electric magnetic coil, thus automatically cut off car load power supply in the very first time of short circuit, automatically cut off the function of car load power supply when making battery main switch have vehicle circuitry short circuit, substantially increase the fail safe of car load.
Summary of the invention
The object of the invention is the closed type battery main switch proposing a kind of automatic operation, this switch internal current sampling unit detects whether short circuit, automatically car load power supply is cut off when short circuit, mainly solving present master switch is all that car load power supply is cut off in manual operation, can not automatically cut off car load power supply in time and the vehicle that causes catches fire problem when short circuit.
The invention provides a kind of closed type battery main switch device, comprise housing (1); Current sampling unit, is connected with car load load; Main control chip (7); Moving contact (9) and fixed contact (10); Solenoid (13) is wrapped on iron core (15) and steel column (14), and wherein said solenoid (13) is powered by storage battery (12), and it is characterized in that: also comprise switch block, respectively with solenoid (13), main control chip (7) is connected; Current sampling unit is also connected with fixed contact and main control chip respectively;
The current signal of signal and current sampling unit that main control chip (7) gathers starting switch (2) is with control switch parts.
Further the present invention, also comprises spring 11, and the elastic force of spring makes dynamic and static contact be connected, storage battery by dynamic and static contact and current sampling unit to 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 are beyond preset value, then the conducting of main control chip (7) control switch parts makes solenoid (13) loop connect and produces electromagnetic attraction, steel column (14) drives moving contact (9) to move downward, moving contact (9) and fixed contact (10) disconnect, car load electric appliance load (3) power-off; If main control chip (7) collects the signal of starting switch (2), then main control chip (7) judges that this abnormal signal is starting current signal, now main control chip (7) still control switch parts remain open and be failure to actuate.
Further, switch block is preferably metal-oxide-semiconductor, and metal-oxide-semiconductor (8) drain electrode is connected with solenoid (13) control end; Metal-oxide-semiconductor (8) source electrode is connected with the negative pole of storage battery (12); Metal-oxide-semiconductor grid is connected with main control chip (7).Further, switch block is preferably transistor.
Further, current sampling unit is wherein preferably current transformer.
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 makes sound contact disconnect according to the signal gathered with control switch parts and realizes load power down.
Effective effect of the present invention is:
Automatically cut off the function of car load power supply when making battery main switch have vehicle circuitry short circuit, improve the fail safe of car load.
Accompanying drawing explanation
Fig. 1 is circuit theory of the present invention and structural representation.
Embodiment
Below in conjunction with embodiment, the present invention will be further described.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 by the voltage transitions of 12V, metal-oxide-semiconductor (8) drain electrode be connected with solenoid (13) control end; Metal-oxide-semiconductor (8) source electrode is connected with the negative pole of storage battery (12); Metal-oxide-semiconductor grid is connected with main control chip (7); Solenoid (13) power end is often connected with storage battery (12) positive pole; Solenoid (13) is wrapped on iron core (15); Connecting line between binding post (4) and fixed contact (10) is through current transformer (5);
Implement automatically to control to metal-oxide-semiconductor (8) after main control chip (7) gathers switching signal summation current transformer (5) current signal of starting switch (2) under the support of software.
During normality: moving contact (9) is connected with fixed contact (10) by the pulling force of spring (11), 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) controls metal-oxide-semiconductor (8) cut-off, solenoid (13) open circuit.
During short-circuit protection: when car load electric appliance load (3) is short-circuited, short circuit current is through current transformer (5), main control chip (7) collects the abnormal signal of current transformer (5), this abnormal signal and the data preset in software compare by main control chip (7), and gather the signal of starting switch (2), if starting switch (2) no signal and abnormal signal are beyond the data preset in software, then main control chip (7) controls metal-oxide-semiconductor (8) conducting, solenoid (13) loop is connected and is produced electromagnetic attraction, steel column (14) drives moving contact (9) to move downward, moving contact (9) and fixed contact (10) disconnect, car load electric appliance load (3) is without electricity, if main control chip (7) collects the signal of starting switch (2), then main control chip (7) sets the abnormal signal of current transformer (5) is in software starting current signal, now main control chip (7) still controls metal-oxide-semiconductor (8) cut-off, solenoid (13) still open circuit, (this state is to distinguish short circuit current or normal starting current in the connection of spring (11) maintenance moving contact (9) and fixed contact (10), 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 with fixed contact (10), and 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).When car load electric appliance load (3) is short-circuited, short circuit current is through current transformer (5), main control chip (7) collects the abnormal signal of current transformer (5), this abnormal signal and the data preset in software compare by main control chip (7), and gather the signal of starting switch (2), if starting switch (2) no signal and abnormal signal are beyond the data preset in software, then main control chip (7) controls metal-oxide-semiconductor (8) conducting, solenoid (13) loop is connected and is produced electromagnetic attraction, steel column (14) drives moving contact (9) to move downward, moving contact (9) and fixed contact (10) disconnect, car load electric appliance load (3) power-off.
Battery main switch of the present invention has and automatically detects automatic control function, and can cut off the electricity supply in the very first time, well solve existing master switch and need manual operation and the problem that the delay time at stop causes vehicle to catch fire, structure is simply suitable for large-scale promotion.
Claims (5)
1. a closed type battery main switch device, comprises housing (1); Current sampling unit, is connected with car load load; Main control chip (7); Moving contact (9) and fixed contact (10); Solenoid (13) is wrapped on iron core (15) and steel column (14), steel column is connected with moving contact, wherein said solenoid (13) is powered by storage battery (12), it is characterized in that: also comprise switch block, be connected with solenoid (13), main control chip (7) respectively; Current sampling unit is also connected with fixed contact and main control chip respectively;
Also comprise spring (11), the elastic force of spring makes dynamic and static contact be connected, storage battery by dynamic and static contact and current sampling unit to car load load supplying;
The current signal of signal and current sampling unit that main control chip (7) gathers starting switch (2) is with control switch parts;
Wherein, 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 are beyond preset value, then the conducting of main control chip (7) control switch parts makes solenoid (13) loop connect and produces electromagnetic attraction, steel column (14) drives moving contact (9) to move downward, moving contact (9) and fixed contact (10) disconnect, car load electric appliance load (3) power-off; If main control chip (7) collects the signal of starting switch (2), then main control chip (7) judges that this abnormal signal is starting current signal, now main control chip (7) still control switch parts remain open and be failure to actuate.
2. switching device according to claim 1, switch block is wherein metal-oxide-semiconductor, and metal-oxide-semiconductor (8) drain electrode is connected with solenoid (13) control end; Metal-oxide-semiconductor (8) source electrode is connected with the negative pole of storage battery (12); Metal-oxide-semiconductor grid is connected with main control chip (7).
3. switching device according to claim 1, current sampling unit is wherein current transformer.
4. switching device according to claim 1, switch block is wherein transistor.
5. an automatic power off method for automobile short circuit, is applicable to a kind of closed type battery main 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 makes sound contact disconnect according to the signal gathered with control switch parts and realizes load power down;
Wherein, starting switch (2) no signal collected when main control chip and abnormal current signal are beyond preset value;
Then the conducting of main control chip (7) control switch parts makes solenoid (13) loop connect and produces electromagnetic attraction, steel column (14) drives moving contact (9) to move downward, moving contact (9) and fixed contact (10) disconnect, car load electric appliance load (3) power-off.
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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN102903580A CN102903580A (en) | 2013-01-30 |
| CN102903580B true 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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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US11070049B2 (en) | 2017-11-08 | 2021-07-20 | Eaton Intelligent Power Limited | System, method, and apparatus for power distribution in an electric mobile application using a combined breaker and relay |
| 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 |
| CN111448731B (en) | 2017-11-08 | 2023-06-30 | 伊顿智能动力有限公司 | Power distribution unit and fuse management for electric mobile applications |
| EP3776779A2 (en) * | 2018-04-10 | 2021-02-17 | Eaton Intelligent Power Limited | System, method, and apparatus for power distribution in an electric mobile application using a combined breaker and relay |
| 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 |
| CN114175444A (en) | 2019-07-15 | 2022-03-11 | 伊顿智能动力有限公司 | Power distribution and circuit protection for mobile applications with high efficiency inverters |
| 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 |
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| CN1351399A (en) * | 2000-10-30 | 2002-05-29 | 钟汝祥 | Protecting switch for fire accident and electric destroy |
| CN102047368A (en) * | 2008-05-30 | 2011-05-04 | 矢崎总业株式会社 | Relay controller |
| CN202871721U (en) * | 2012-10-24 | 2013-04-10 | 安徽江淮汽车股份有限公司 | Normally closed power master switch device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010154621A (en) * | 2008-12-24 | 2010-07-08 | Sanyo Electric Co Ltd | Power supply device for vehicle |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1351399A (en) * | 2000-10-30 | 2002-05-29 | 钟汝祥 | Protecting switch for fire accident and electric destroy |
| CN102047368A (en) * | 2008-05-30 | 2011-05-04 | 矢崎总业株式会社 | Relay controller |
| CN202871721U (en) * | 2012-10-24 | 2013-04-10 | 安徽江淮汽车股份有限公司 | Normally closed power master switch device |
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| CN102903580A (en) | 2013-01-30 |
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| CB03 | Change of inventor or designer information |
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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Free format text: CORRECT: INVENTOR; FROM: WANG YIHAI HAN YONG CAI MIN ZHOU JIMAO WANG MINGMING TO: WANG YIHAI LI XIA HU YI HAN YONG CAI MIN |
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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 |