CN204215007U - The contact detection device of high-voltage relay used for electric vehicle - Google Patents
The contact detection device of high-voltage relay used for electric vehicle Download PDFInfo
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- CN204215007U CN204215007U CN201420499665.7U CN201420499665U CN204215007U CN 204215007 U CN204215007 U CN 204215007U CN 201420499665 U CN201420499665 U CN 201420499665U CN 204215007 U CN204215007 U CN 204215007U
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Abstract
This application discloses a kind of contact detection device of high-voltage relay used for electric vehicle, comprising: microcontroller, test cell, collecting unit and converting unit; In this application, by being provided with test cell for tested contact, thus measuring current can be exported with the current value of the adaptation of circuits with tested contact to tested contact, and then when can detect the state of high-voltage relay contact, whether normally measure tested contact by the voltage gathering inspection leakage resistance; The application is obtained the digital signal of the current information of test tested contact self, and then generates testing result after can exporting measuring current by microcontroller to tested contact easily by collecting unit; Detected object due to the application is detected contact itself, and can real-time/detecting this tested contact as required, so can directly, in time, effectively carry out the detection of electric automobile high-voltage relay contact state.
Description
Technical field
The utility model relates to automobile automation field, particularly relates to a kind of contact detection device of high-voltage relay used for electric vehicle.
Background technology
CAN (Controller Area Network, controller local area network) is widely used in auto electronic control technology, for realizing the Inspect and control of automobile; Concrete, by CAN, can realize the timing of such as engine, oiling controls, acceleration, brake control the data communication in the electronic control systems such as the anti-lock brake system (ABS) of (ASC) and complexity between each unit.
In the electronic control system of electric automobile, high-voltage relay, as the automatic switch element with buffer action, can realize the control for circuit in multiple automobile.
In high-voltage relay, the quality of contact can affect the validity controlled automobile, that is, when the contact fault of high-voltage relay, the control of electronic control system can be caused to lose efficacy, thus cause the potential safety hazard of driving; For this reason, need effectively to detect the contact of high-voltage relay, to get rid of potential safety hazard.
In prior art, the contact detection method of high-voltage relay comprises, and when being connected by battery management system monitoring high pressure, curent change in loop, derives the whether adhesion of high-voltage relay contact.
Inventor finds through research, and in prior art, the mode of being monitored by battery management system just can only be detected when each startup, so do not possess real-time, can not find the fault of high-voltage relay contact in time; So there is the possibility losing efficacy or judged by accident.
Therefore, in prior art, need a kind of can in time and effectively carry out high-voltage relay contact detect mode.
Utility model content
In order to problem is not in time detected in the contact solving high-voltage relay existing in prior art, the utility model a kind of contact detection device of high-voltage relay used for electric vehicle is provided, comprising: microcontroller, test cell, collecting unit and converting unit;
Described test cell comprises: isolated DC/DC converter DC/DC, switching tube and inspection leakage resistance;
Described isolation DC/DC, for generating the measuring current with the adaptation of circuits of tested contact according to the steering order of described microcontroller; Described positive pole of isolating DC/DC is connected with the side of described tested contact after connecting with described switching tube; The opposite side of described tested contact is connected with described negative pole of isolating DC/DC after connecting with described inspection leakage resistance;
Described collecting unit comprises, and for the analog voltage signal of described inspection leakage resistance being converted to the digital to analog converter ADC module of digital signal, and the magnitude of voltage for the digital signal by ADC module is adjusted to the isolation module with described microcontroller adaptation;
Described converting unit is connected with controller local area network CAN, for after described microcontroller generates testing result according to described digital signal, described testing result is converted to the data meeting described CAN consensus standard.
Preferably, in the utility model embodiment, described microcontroller comprise for the described universal input/output interface of isolating DC/DC and being connected.
Preferably, in the utility model embodiment, described tested contact includes multiple, and each described tested contact is connected to corresponding test cell;
Described microcontroller comprises multiple universal input/output interface, and multiple universal input/output interface is connected with each described DC/DC that isolates respectively.
Preferably, in the utility model embodiment, described switching tube comprises diode.
Preferably, in the utility model embodiment, described converting unit comprises:
CAN transceiver.
Preferably, in the utility model embodiment, described microcontroller also comprises:
For described testing result being sent to the I2C interface of each controller in electric automobile, SCI interface or/and one in universal input/output interface or combination in any.
As can be seen from above-mentioned technical scheme, in this application, by being provided with test cell for tested contact, thus measuring current can be exported with the current value of the adaptation of circuits with tested contact to tested contact, and then when can detect the state of high-voltage relay contact, whether normally measure tested contact by the voltage gathering inspection leakage resistance; The application is obtained the digital signal of the current information of test tested contact self, and then generates testing result after can exporting measuring current by microcontroller to tested contact easily by collecting unit; Detected object due to the application is detected contact itself, and can real-time/detecting this tested contact as required, so can directly, in time, effectively carry out the detection of electric automobile high-voltage relay contact state.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the contact detection device of high-voltage relay used for electric vehicle described in the application;
Fig. 2 carries out for using the contact detection device of high-voltage relay used for electric vehicle described in the application the method flow schematic diagram detected.
Embodiment
The utility model scheme is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Can not directly and accurately technical matters to the detection of high-voltage relay contact in prior art in order to solve, provide a kind of contact detection device of high-voltage relay used for electric vehicle in this application, as shown in Figure 1, comprising: microcontroller 01, test cell 02, collecting unit 03 and converting unit 04;
Test cell 02 comprises isolation DC/DC23, switching tube 24 and inspection leakage resistance 25; Wherein, isolate DC/DC23 to be used for generating the measuring current with the adaptation of circuits of tested contact 22 according to the steering order of microcontroller 01; Isolation DC/DC23 positive pole connect with switching tube 24 after be connected with the side of tested contact 22; The opposite side of tested contact 22 is connected with the negative pole of isolation DC/DC23 after connecting with inspection leakage resistance 25;
Collecting unit 03 comprises, and for the analog voltage signal of inspection leakage resistance 25 being converted to the ADC module 31 of digital signal, and the magnitude of voltage for the digital signal by ADC module 31 is adjusted to the isolation module 32 with microcontroller 01 adaptation;
Converting unit 04 is connected with CAN, for after microcontroller 01 generates testing result according to digital signal, testing result is converted to the data meeting CAN consensus standard.
In detection mode in the prior art, curent change in loop when being connected by battery management system monitoring high pressure, derive the mode of high-voltage relay contact whether adhesion, just can only detect when each startup, so do not possess real-time, the fault of high-voltage relay contact can not be found in time, for this reason, in the application, by being directly the mode that tested contact builds test circuit, directly obtain the electric state information of tested contact, thus reach the object detecting tested contact in real time.
Concrete, in this application, in order to the break-make information of the tested contact 22 of acquisition that can be real-time, have employed as tested contact 22 builds the direct mode detected tested contact of test circuit, concrete, contact detection device in the application is according to the difference of the function of each unit, microcontroller 01 can be divided into, test cell 02, collecting unit 03 and this few part of converting unit 04, wherein microcontroller 01 is as control assembly, can by the software program setting of himself, or, the network datas such as the feedback data received by converting unit 04 generate steering order, in addition, microcontroller 01 can also carry out the process such as the computing preset to generate testing result according to the digital signal received.
After microcontroller 01 generates steering order, isolation DC/DC23 can export measuring current according to this steering order to tested contact 22; Because isolation DC/DC23 can play the effect of isolation, thus the relatively high pressure electric current at tested contact 22 place can be avoided for the impact of microcontroller 01 or possible damage.
In actual applications, tested contact 22 in high-voltage relay can include multiple, for this reason, isolation DC/DC23 also needs and multiple tested contacts 22 one_to_one corresponding, that is, each tested contact 22 isolates DC/DC23 to there being one, now, can connect by multiple universal input/output interfaces of microcontroller 01 are corresponding with multiple DC/DC23 of isolation respectively, measuring current can be exported respectively to each tested contact 22 to make multiple isolation DC/DC23.
Test cell 02 also comprises the switching tube 24 between positive pole and tested contact 22 being series at isolation DC/DC23, when switching tube 24 can prevent multiple tested contact from working simultaneously, mutually disturbs; In addition, test cell 02 also comprises the inspection leakage resistance 25 between negative pole and tested contact 22 being series at isolation DC/DC23, by gathering the magnitude of voltage of inspection leakage resistance 25, just can realize the detection to the electric current flowing through tested contact 22.In actual applications, switching tube 24 can be generally diode.
In order to the magnitude of voltage of inspection leakage resistance 25 is converted to available data message, in this application, also be provided with collecting unit 03, collecting unit 03 specifically comprises ADC module 31 and isolation module 32, after wherein ADC module 31 is connected with inspection leakage resistance 25, the analog voltage signal at inspection leakage resistance 25 two ends is converted to digital signal, then isolating through isolation module 32 pairs of digital signals/pressure regulation to be to generate and the digital signal of microcontroller 01 voltage adaptation, isolation module 32 is connected with microcontroller 01, therefore microcontroller 01 can receive the resistance information data of inspection leakage resistance 25, and then the ON/OFF state of tested contact 22 can be judged,
In order to realize remote network control, in this application, contact detection device also comprises converting unit 04, converting unit 04 is connected with controller local area network CAN, carry out the detection moment of tested contact 22 according to net control demand for microcontroller 01, after generating testing result with the digital signal of collecting unit 03, testing result is converted to the data meeting CAN consensus standard.Converting unit 04 can be specifically CAN transceiver, thus can realize the data interaction with other equipment in vehicle by CAN.
Further, in this application, microcontroller 01 can also include I2C interface, SCI interface or/and universal input/output interface, like this, by above-mentioned interface, just the testing result that microcontroller 01 generates can be sent in electric automobile in each controller.
In sum, in this application, by being provided with test cell for tested contact, thus measuring current can be exported with the current value of the adaptation of circuits with tested contact to tested contact, and then when can detect the state of high-voltage relay contact, whether normally measure tested contact by the voltage gathering inspection leakage resistance; The application is obtained the digital signal of the current information of test tested contact self, and then generates testing result after can exporting measuring current by microcontroller to tested contact easily by collecting unit; Detected object due to the application is detected contact itself, and can real-time/detecting this tested contact as required, so can directly, in time, effectively carry out the detection of electric automobile high-voltage relay contact state.
Use the contact detection device of high-voltage relay used for electric vehicle described in the application, the method carrying out detecting as shown in Figure 2, can comprise step:
S11, when high-voltage relay is in adhesive/off-state, to the measuring current of tested contact input with the adaptation of circuits of tested contact, and obtain the analog voltage signal of tested contact by examining leakage resistance; Measuring current generates according to the steering order of microcontroller by isolating DC/DC;
In detection mode in the prior art, curent change in loop when being connected by battery management system monitoring high pressure, derive the mode of high-voltage relay contact whether adhesion, just can only detect when each startup, so do not possess real-time, the fault of high-voltage relay contact can not be found in time, for this reason, in the application, by being directly the mode that tested contact builds test circuit, directly obtain the electric state information of tested contact, thus reach the object detecting tested contact in real time.
The microcontroller that the application uses, as control assembly, can be set, or the network datas such as the feedback data received by converting unit is generated steering order by the software program of himself; In addition, microcontroller can also carry out the process such as the computing preset to generate testing result according to the digital signal received.
After microcontroller generates steering order, isolation DC/DC can export measuring current according to this steering order to tested contact; Because isolation DC/DC can play the effect of isolation, thus the relatively high pressure electric current at tested contact place can be avoided for the impact of microcontroller or possible damage.
In actual applications, tested contact in high-voltage relay can include multiple, for this reason, isolation DC/DC also needs and multiple tested contacts one_to_one corresponding, that is, each tested contact isolates DC/DC to there being one, now, can connect by multiple universal input/output interfaces of microcontroller are corresponding with multiple DC/DC of isolation respectively, measuring current can be exported respectively to each tested contact to make multiple isolation DC/DC.
In the application, when the switching tube be series between the positive pole of isolation DC/DC and tested contact can prevent multiple tested contact from working simultaneously, mutually disturb; In addition, being series between the negative pole of isolation DC/DC and tested contact and being also provided with inspection leakage resistance, by gathering the magnitude of voltage of inspection leakage resistance, just can realize the detection to the electric current flowing through tested contact.In actual applications, switching tube generally can adopt diode.
S12, by inspection leakage resistance analog voltage signal be converted to digital signal; And the magnitude of voltage of digital signal is adjusted to microcontroller adaptation detect data;
In order to the magnitude of voltage of inspection leakage resistance is converted to available data message, in this application, also be provided with and the ADC module examined leakage resistance and be connected, the analog voltage signal at inspection leakage resistance two ends is converted to digital signal by ADC module, then through isolation module to digital signal isolate/pressure regulation to be to generate and the digital signal of microcontroller voltage adaptation, isolation module is connected with microcontroller, therefore microcontroller can receive the resistance information data of inspection leakage resistance, and then can judge the ON/OFF state of tested contact.
S13, microcontroller are according to detection data genaration testing result;
Because microcontroller self has data processing function, so the testing result of tested contact can be paired in next life according to detection data;
S14, testing result is converted to the data meeting CAN consensus standard, and is sent to CAN.
In order to realize remote network control, in this application, by the converting unit be connected with controller local area network CAN, testing result can also be converted to the data meeting CAN consensus standard; Concrete can be, microcontroller carries out the detection moment of tested contact according to net control demand, after generating testing result with the digital signal of collecting unit, by CAN transceiver, thus the data interaction with other equipment in vehicle can be realized by CAN.
Further, in this application, microcontroller can also include I2C interface, SCI interface or/and universal input/output interface, like this, by above-mentioned interface, just the testing result that microcontroller generates can be sent in electric automobile in each controller.
In sum, in this application, by being provided with test cell for tested contact, thus measuring current can be exported with the current value of the adaptation of circuits with tested contact to tested contact, thus when high-voltage relay is in adhesive/off-state, whether normally tested contact can be measured by the voltage gathering inspection leakage resistance; The application is obtained the digital signal of the current information of test tested contact self, and then generates testing result after can exporting measuring current by microcontroller to tested contact easily by collecting unit; Detected object due to the application is detected contact itself, and can real-time/detecting this tested contact as required, so can directly, in time, effectively carry out the detection of electric automobile high-voltage relay contact state.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For the device that embodiment provides, the method provided due to itself and embodiment is corresponding, so description is fairly simple, relevant part illustrates see method part.
To the above-mentioned explanation of provided embodiment, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle provided in this article and features of novelty.
Claims (6)
1. a contact detection device for high-voltage relay used for electric vehicle, is characterized in that, comprising: microcontroller, test cell, collecting unit and converting unit;
Described test cell comprises: isolated DC/DC converter DC/DC, switching tube and inspection leakage resistance;
Described isolation DC/DC, for generating the measuring current with the adaptation of circuits of tested contact according to the steering order of described microcontroller; Described positive pole of isolating DC/DC is connected with the side of described tested contact after connecting with described switching tube; The opposite side of described tested contact is connected with described negative pole of isolating DC/DC after connecting with described inspection leakage resistance;
Described collecting unit comprises, and for the analog voltage signal of described inspection leakage resistance being converted to the digital to analog converter ADC module of digital signal, and the magnitude of voltage for the digital signal by ADC module is adjusted to the isolation module with described microcontroller adaptation;
Described converting unit is connected with controller local area network CAN, for after described microcontroller generates testing result according to described digital signal, described testing result is converted to the data meeting described CAN consensus standard.
2. the contact detection device of high-voltage relay used for electric vehicle according to claim 1, is characterized in that,
Described microcontroller comprise for the described universal input/output interface of isolating DC/DC and being connected.
3. the contact detection device of high-voltage relay used for electric vehicle according to claim 2, is characterized in that,
Described tested contact includes multiple, and each described tested contact is connected to corresponding test cell;
Described microcontroller comprises multiple universal input/output interface, and multiple universal input/output interface is connected with each described DC/DC that isolates respectively.
4. the contact detection device of high-voltage relay used for electric vehicle according to claim 3, is characterized in that,
Described switching tube comprises diode.
5. the contact detection device of high-voltage relay used for electric vehicle according to claim 4, it is characterized in that, described converting unit comprises:
CAN transceiver.
6. the contact detection device of high-voltage relay used for electric vehicle according to claim 5, it is characterized in that, described microcontroller also comprises:
For described testing result being sent to the internal integrated circuit I2C interface of each controller in electric automobile, SCI interface or/and one in universal input/output interface or combination in any.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420499665.7U CN204215007U (en) | 2014-08-29 | 2014-08-29 | The contact detection device of high-voltage relay used for electric vehicle |
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| CN201420499665.7U CN204215007U (en) | 2014-08-29 | 2014-08-29 | The contact detection device of high-voltage relay used for electric vehicle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155603A (en) * | 2014-08-29 | 2014-11-19 | 一汽-大众汽车有限公司 | Contact detection device and method of high-voltage relay for electric vehicle |
| CN106771934A (en) * | 2017-02-10 | 2017-05-31 | 汽-大众汽车有限公司 | A kind of motor in electric automobile tests high-low pressure cable connecting device |
| CN108303641A (en) * | 2017-01-11 | 2018-07-20 | 上海埃而生电气股份有限公司 | High voltage connector state micro-current injects detection circuit and detection method and system |
-
2014
- 2014-08-29 CN CN201420499665.7U patent/CN204215007U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155603A (en) * | 2014-08-29 | 2014-11-19 | 一汽-大众汽车有限公司 | Contact detection device and method of high-voltage relay for electric vehicle |
| CN108303641A (en) * | 2017-01-11 | 2018-07-20 | 上海埃而生电气股份有限公司 | High voltage connector state micro-current injects detection circuit and detection method and system |
| CN106771934A (en) * | 2017-02-10 | 2017-05-31 | 汽-大众汽车有限公司 | A kind of motor in electric automobile tests high-low pressure cable connecting device |
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