CN202013853U - High-voltage relay service life prolonging protective circuit for electric automobile - Google Patents
High-voltage relay service life prolonging protective circuit for electric automobile Download PDFInfo
- Publication number
- CN202013853U CN202013853U CN2010206776422U CN201020677642U CN202013853U CN 202013853 U CN202013853 U CN 202013853U CN 2010206776422 U CN2010206776422 U CN 2010206776422U CN 201020677642 U CN201020677642 U CN 201020677642U CN 202013853 U CN202013853 U CN 202013853U
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to a high-voltage relay service life prolonging protective circuit for an electric automobile. A first end of a normally open contact of a high-voltage relay (J) is connected with an external high-voltage power supply; a second end of the normally open contact of the high-voltage relay (J) is connected with electricity load equipment of the automobile. The protective circuit is characterized in that high-voltage relay service life prolonging protective circuit for the electric automobile comprises a pre-charging module (1) and a power resistor (R1) which are connected in serial, wherein the pre-charging module (1) comprises a pre-charging relay, a transistor and a singlechip microcomputer controller. Compared with the prior art, the protective circuit has the advantages that with the arrangement of the low power pre-charging relay, the high voltage transistor and the simple controller, the protection of the high-voltage relay in a battery management system can be realized; the protective circuit has a simple structure; when the protective circuit is used in a practical circuit, the high-voltage relay is not easy to generate an electric arc in the contact closing process; therefore, the high-voltage relay contact can be protected, and the service life of the high-voltage relay is prolonged.
Description
Technical field
The utility model relates to a kind of used for electric vehicle high-voltage relay life-span prolongation protective circuit.
Background technology
21 century, the new-energy automobile development is a very popular research topic, and the power of new-energy automobile mainly comes from the storage battery that carries with car at present, and it has the high-voltage large current characteristic when exporting as power source; So new-energy automobile is carried out power source output control reliability to be required very high, generally only relying on electronic devices and components is to guarantee its reliability, what at present it is controlled employing is high-voltage relay, high-voltage relay have reliability height, carrying load ability strong, be easy to plurality of advantages such as control and on new-energy automobile, be used widely; But also there are some problems in it, mainly is that the hybrid power new-energy automobile itself has a lot of capacitive controller and load, can regard these capacitive controllers or load as a very large electric capacity; So, when high-voltage relay carries out adhesive,, have a strong impact on the useful life of contact and high-voltage relay because the high-voltage large current and the load effect of storage battery output can produce electric arc on high-voltage relay adhesive contact.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of when the high-voltage relay adhesive at above-mentioned prior art; on the high-voltage relay contact, be difficult for producing electric arc; thereby protected the high-voltage relay contact, prolonged the high-voltage relay used for electric vehicle high-voltage relay life-span prolongation protective circuit in useful life.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: this used for electric vehicle high-voltage relay life-span prolongs protective circuit, first end of the normally opened contact of described high-voltage relay links to each other with external high voltage power supply, second end of the normally opened contact of described high-voltage relay links to each other with the electricity consumption load equipment of automobile, it is characterized in that: the described used for electric vehicle high-voltage relay life-span prolongs protective circuit and comprises pre-charge module and the power resistor that is serially connected, wherein said pre-charge module comprises pre-charge-relay, transistor, current-limiting resistance, voltage stabilizing didoe, the protection diode, electric capacity, protective resistance and singlechip controller, first end of the normally-closed contact of described pre-charge-relay links to each other with first end of the normally opened contact of described high-voltage relay, second end of the normally-closed contact of described pre-charge-relay links to each other with described transistor drain, described transistorized source electrode links to each other with first end of described power resistor, and second end of described power resistor links to each other with second end of the normally opened contact of described high-voltage relay; Described transistorized grid connects a protective resistance and links to each other with the signal output part of described singlechip controller, first end of described current-limiting resistance links to each other with described transistor drain, second end of described current-limiting resistance links to each other with the anode of described protection diode, the negative electrode of described protection diode links to each other with the power input of described singlechip controller, the negative electrode of described voltage stabilizing didoe also links to each other with the power input of described singlechip controller, and the two ends of described electric capacity are attached between the power input and ground of described singlechip controller; The anode of described voltage stabilizing didoe also links to each other with first end of described power resistor.
Compared with prior art, advantage of the present utility model is: by low power pre-charge-relay is set, withstand voltage high transistor and simple control circuit can realize in the battery management system to the protection of high-voltage relay.The utility model circuit structure is simple; pre-charge module is made a simple integration module, in side circuit, use, can make high-voltage relay in closing of contact process, be difficult for producing electric arc; thereby protected the high-voltage relay contact, prolonged high-voltage relay useful life.
Description of drawings
Fig. 1 is the structural representation that the used for electric vehicle high-voltage relay life-span prolongs protective circuit among the utility model embodiment.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
The used for electric vehicle high-voltage relay life-span as shown in Figure 1 prolongs protective circuit, first end of the normally opened contact of wherein protected high-voltage relay J links to each other with external high voltage power supply, second end of the normally opened contact of high pressure relay J device links to each other with the electricity consumption load equipment of automobile, the described used for electric vehicle high-voltage relay life-span prolongs protective circuit and comprises pre-charge module 1 and the power resistor R1 that is serially connected, wherein said pre-charge module 1 comprises pre-charge-relay J1, transistor Q1, current-limiting resistance R2, voltage stabilizing didoe D2, protection diode D1, capacitor C, protective resistance R3 and singlechip controller U1, first end of the normally-closed contact of described pre-charge-relay J1 links to each other with first end of the normally opened contact of described high-voltage relay J, second end of the normally-closed contact of described pre-charge-relay J1 links to each other with the drain electrode of described transistor Q1, the source electrode of described transistor Q1 links to each other with first end of described power resistor R1, and second end of described power resistor R1 links to each other with second end of the normally opened contact of described high-voltage relay J; The grid of described transistor Q1 connects a protective resistance R3 and links to each other with the signal output part of described singlechip controller U1, first end of described current-limiting resistance R2 links to each other with the drain electrode of described transistor Q1, second end of described current-limiting resistance R2 links to each other with the anode of described protection diode D1, the negative electrode of described protection diode D1 links to each other with the power input of described singlechip controller U1, the negative electrode of described voltage stabilizing didoe D2 also links to each other with the power input of described singlechip controller U1, and the two ends of described capacitor C are attached between the power input and ground of described singlechip controller U1; The anode of described voltage stabilizing didoe D2 also links to each other with first end of described power resistor R1.
The operation principle that the above-mentioned used for electric vehicle high-voltage relay life-span prolongs protective circuit is as follows:
At first adhesive of pre-charge-relay J1 when external high-tension battery is connected, this moment is not because transistor Q1 has conducting.Electric current does not flow through in the passage of protected high-voltage relay J, and the adhesive of high-voltage relay contact is safe.After the high-voltage relay adhesive, high-tension battery provides a stable voltage VCC for singlechip controller U1 through current-limiting resistance R2 and voltage stabilizing didoe D2, because external load electric capacity has just begun charging, so equivalence and ground connection, singlechip controller U1 obtains beginning according to setting program output pulse behind the electricity, the control that transistor Q1 is subjected to duty ratio increases gradually by electric current, and the voltage at load capacitance two ends raises gradually.Transistor Q1 conducting fully when nearly finishing to charging, the voltage of the voltage of battery side and load capacitance is almost equal at this moment.Because the voltage on both sides is almost suitable, so singlechip controller two ends VCC voltage can not be kept, forces singlechip controller to quit work at last, thereby cut off transistor Q1 automatically.This moment is because the voltage of load capacitance is identical with the high-tension battery magnitude of voltage; like this in protected high-voltage relay J adhesive; because there is not too high voltage difference in both sides; thereby can there be spark and big electric current when contacting yet, so just can realize protecting the purpose of high-voltage relay J.
Claims (1)
1. a used for electric vehicle high-voltage relay life-span prolongs protective circuit, first end of the normally opened contact of described high-voltage relay (J) links to each other with external high voltage power supply, second end of the normally opened contact of described high pressure relay (J) device links to each other with the electricity consumption load equipment of automobile, it is characterized in that: the described used for electric vehicle high-voltage relay life-span prolongs protective circuit and comprises pre-charge module (1) and the power resistor (R1) that is serially connected, wherein said pre-charge module comprises pre-charge-relay (J1), transistor (Q1), current-limiting resistance (R2), voltage stabilizing didoe (D2), protection diode (D1), electric capacity (C), protective resistance (R3) and singlechip controller (U1), first end of the normally-closed contact of described pre-charge-relay (J1) links to each other with first end of the normally opened contact of described high-voltage relay (J), second end of the normally-closed contact of described pre-charge-relay (J1) links to each other with the drain electrode of described transistor (Q1), the source electrode of described transistor (Q1) links to each other with first end of described power resistor (R1), and second end of described power resistor (R1) links to each other with second end of the normally opened contact of described high-voltage relay (J); The grid of described transistor (Q1) connects a protective resistance (R3) and links to each other with the signal output part of described singlechip controller (U1), first end of described current-limiting resistance (R2) links to each other with the drain electrode of described transistor (Q1), second end of described current-limiting resistance (R2) links to each other with the anode of described protection diode (D1), the negative electrode of described protection diode (D1) links to each other with the power input of described singlechip controller (U1), the negative electrode of described voltage stabilizing didoe (D2) also links to each other with the power input of described singlechip controller (U1), and the two ends of described electric capacity (C) are attached between the power input and ground of described singlechip controller (U1); The anode of described voltage stabilizing didoe (D2) also links to each other with first end of described power resistor (R1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206776422U CN202013853U (en) | 2010-12-13 | 2010-12-13 | High-voltage relay service life prolonging protective circuit for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206776422U CN202013853U (en) | 2010-12-13 | 2010-12-13 | High-voltage relay service life prolonging protective circuit for electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202013853U true CN202013853U (en) | 2011-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206776422U Expired - Fee Related CN202013853U (en) | 2010-12-13 | 2010-12-13 | High-voltage relay service life prolonging protective circuit for electric automobile |
Country Status (1)
| Country | Link |
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| CN (1) | CN202013853U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104442404A (en) * | 2014-11-05 | 2015-03-25 | 苏州汇川技术有限公司 | High-voltage bin contactor control system of electomobile and control method thereof |
| CN104941958A (en) * | 2014-03-25 | 2015-09-30 | 中国科学院空间科学与应用研究中心 | On-track pollution cleaning device used for Langmuir probe sensing instrument |
-
2010
- 2010-12-13 CN CN2010206776422U patent/CN202013853U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104941958A (en) * | 2014-03-25 | 2015-09-30 | 中国科学院空间科学与应用研究中心 | On-track pollution cleaning device used for Langmuir probe sensing instrument |
| CN104442404A (en) * | 2014-11-05 | 2015-03-25 | 苏州汇川技术有限公司 | High-voltage bin contactor control system of electomobile and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111019 Termination date: 20151213 |
|
| EXPY | Termination of patent right or utility model |