CN109669128A - Comprehensive safety detection device - Google Patents
Comprehensive safety detection device Download PDFInfo
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- CN109669128A CN109669128A CN201710946733.8A CN201710946733A CN109669128A CN 109669128 A CN109669128 A CN 109669128A CN 201710946733 A CN201710946733 A CN 201710946733A CN 109669128 A CN109669128 A CN 109669128A
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- 238000001514 detection method Methods 0.000 title claims abstract description 72
- 238000009413 insulation Methods 0.000 claims abstract description 30
- 238000012544 monitoring process Methods 0.000 claims abstract description 22
- 238000004891 communication Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000003708 edge detection Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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Abstract
A kind of comprehensive safety detection device includes positive relay, cathode relay, balanced bridge circuit module, resistive module and MCU module.The both ends of positive relay are respectively provided with the first gathering line and the second gathering line；The both ends of cathode relay are respectively provided with third gathering line and the 4th gathering line；Balanced bridge circuit module is connected between positive relay and cathode relay；Resistive module is connected between positive relay and cathode relay；And MCU module is connect with resistive module, to carry out short-circuit detecting, Insulation monitoring or adhesion detection.
Description
Technical field
It is espespecially a kind of to apply in BMS (battery management system) safety detection the present invention relates to comprehensive safety detection device
Comprehensive safety detection device.
Background technique
For situation now, the environmental pollution of energy crisis and conventional fuel oil car is more serious, is with battery thus
The new energy vehicle of kinetic energy will be needing for future.But since new energy vehicle is also in Rapid development stage, many security risks are past
Toward effectively being prevented not yet, for example, battery high pressure and vehicle body Insulation monitoring and high pressure power-on and power-off when relay adhesion examine
It surveys.The Insulation monitoring of new energy vehicle is generally divided into two kinds, and one kind being integrated in mainboard, is gone to be responsible for sampling calculating by BMS.Other one
Kind is the insulation module using third party producer.It is also independent for detecting widespread practice in this problem in high pressure power-on and power-off adhesion
An external circuit on relay, or the relay with adhesion detection, either any mode requires external
Many modules or plug-in many circuits, it is expensive, and the producer of each detection module is also respectively to have feature, is difficult to accomplish
It is perfectly combined with BMS.
In general, existing technical solution is although provided with various Insulation monitorings and power-on and power-off adhesion detects, but according to
So there are problems that including disadvantage as described below and:
1, the existing BMS in part is often integrated in insulation detecting circuit on mainboard for cost consideration, onboard in this way
Though scheme can reduce cost, finally or going the problem of calculating, bringing by the AD sampling CPU of BMS is once CPU loses
Effect, all safety detections fail.
2, existing onboard Insulation monitoring is tended not to meet bus free voltage and be appointed due to the limitation of circuit design
The detection of meaning insulation resistance value, this will cause circuit board to have multiple versions and be unfavorable for production and the maintenance in later period.
3, there is upper and lower electrical relay there is no power-on and power-off adhesion detection is carried out to relay in many existing BMS
The BMS of adhesion detection is also most of using going to realize in one S relay of parallel connection outside and detection circuit, insulate and two kinds of adhesion
Discrete detection part has often led to the complexity for increasing and being routed of high-voltaghe compartment inner part, in addition, when actually detected
Also do not reach uniformity, it is necessary to have BMS do multiple repairing weld or repeatedly communicated with standalone module could complete detection.
4, existing Insulation monitoring needs a high pressure that could work, so can only after the power-up could be to battery and vehicle body
Do detection of electrical leakage, it is assumed that rear class line electrical leakage is serious, and unpredictalbe personal safety will be occurred by powering on rashly, also has certainly and passes through
Injection high-frequency signal goes down detection in the situation of lower electricity.
5, the existing BMS using relay control power loop is there is no effective detection is done to short circuit, although trying
It is just powered on after carrying out relevant short circuit and detection of electrical leakage to vehicle when vehicle.
Therefore, how to provide it is a kind of can carry out simultaneously short-circuit detecting, Insulation monitoring or adhesion detection, and can by flexibly
CAN communication passes to the comprehensive safety detection device of BMS or VCU, as each dealer project urgently to be resolved.
Summary of the invention
In view of the disadvantages of the prior art, the main object of the present invention, that is, be to provide a kind of can carry out short circuit simultaneously
Detection, Insulation monitoring or adhesion detection, and the comprehensive safety detection dress of BMS or VCU can be passed to by flexible CAN communication
It sets.
In order to achieve the above object and other purposes, the present invention provides a kind of comprehensive safety detection device, including anode after
Electric appliance, cathode relay, balanced bridge circuit module, resistive module and MCU module.The both ends of positive relay are respectively provided with
One gathering line and the second gathering line；The both ends of cathode relay are respectively provided with third gathering line and the 4th gathering line；Balance
Bridge circuit module is connected between positive relay and cathode relay；Resistive module is connected across positive relay and cathode relay
The both ends of device；And MCU module is connect with resistive module, to carry out short-circuit detecting, Insulation monitoring or adhesion detection.
In one embodiment, comprehensive safety detection device is to carry out short-circuit detecting or exhausted in the case where high pressure does not power on
Edge detection.
In one embodiment, comprehensive safety detection device is transmitted to external device (ED) with CAN network, RS485 or RS232 and is believed
Breath.
In one embodiment, external device (ED) includes BCU, VCU or BMS.
In one embodiment, power-up state of the MCU module also to monitor BMS.
In one embodiment, information includes the testing result of short-circuit detecting, Insulation monitoring or adhesion detection.
Compared to the prior art, due to comprehensive safety detection device of the invention by MCU module and positive relay,
First to the 4th gathering line included by cathode relay carries out adhesion detection, and passes through MCU module and positive relay, bears
Pole relay, balanced bridge circuit module and resistive module carry out Insulation monitoring or short-circuit detecting, in other words, synthesis of the invention
Safety detection device can carry out short-circuit detecting, Insulation monitoring or adhesion detection simultaneously.In addition, comprehensive safety of the invention detects dress
Information can also be transmitted to BCU, VCU or other equipment flexibly with the various communication modes such as CAN network, RS485 or RS232 by setting,
Substantially overcome possessed problem in the prior art.
Detailed description of the invention
Fig. 1 is the insulation detecting circuit configuration diagram of the comprehensive safety detection device of one embodiment of the invention；
Fig. 2 is the short-circuit detecting and the signal of adhesion detection circuit framework of the comprehensive safety detection device of one embodiment of the invention
Scheme (by taking positive relay portion parallel circuit as an example)；
Fig. 3 is the overhaul flow chart of the comprehensive safety detection device of one embodiment of the invention.
Symbol description:
1 comprehensive safety detection device
10 positive relays
11 cathode relays
12 balanced bridge circuit modules
13 resistive modules
14 MCU modules
S1~S4 step
Specific embodiment
Illustrate embodiments of the present invention by particular specific embodiment below, those skilled in the art can be by this theory
Other advantages and efficacy of the present invention can be easily understood for the bright revealed content of book.The present invention also can be different specific by other
Embodiment is implemented or is applied.
Fig. 1 and Fig. 2 is please referred to, Fig. 1 is the insulation detecting circuit frame of the comprehensive safety detection device of one embodiment of the invention
Structure schematic diagram, Fig. 2 are that the short-circuit detecting of the comprehensive safety detection device of one embodiment of the invention and adhesion detection circuit framework show
It is intended to (by taking positive relay portion parallel circuit as an example).As shown, comprehensive safety detection device 1 of the invention, including anode after
Electric appliance 10, cathode relay 11, balanced bridge circuit module 12, resistive module 13 and MCU module 14.
The both ends of positive relay 10 are respectively provided with the first gathering line and the second gathering line；The both ends of cathode relay 11
It is respectively provided with third gathering line and the 4th gathering line；Balanced bridge circuit module 12 is connected to positive relay 10 and cathode relay
Between device 11；Resistive module 13 is connected across the both ends of positive relay 10 and cathode relay 11；And MCU module 14 and resistance
Module 13 connects, to carry out short-circuit detecting, Insulation monitoring or adhesion detection.
Specifically, comprehensive safety detection device 1 of the invention uses a kind of concentration hardware, synchronous protective design,
Insulation monitoring and the hardware circuit design of power-on and power-off adhesion detection are in one apparatus.In one embodiment, positive relay 10,
Cathode relay 11 is in BMU control bus.After high pressure on BCU, MCU module 14 starts to insulate to battery and car body
Detection, specifically, MCU module 14 is to calculate insulation resistance value R.Comprehensive safety detection device 1 by CAN network, RS485 or
Actual insulation performance R value is sent to BCU by the various communication modes such as RS232, BCU according to all security feature and battery without
Fault detection determines the actuation of positive relay 10 and cathode relay 11.BCU should be positive relay 10, cathode simultaneously
The attracting state of relay 11 tells comprehensive safety detection device 1 by CAN network.
In one embodiment, the first to the 4th gathering line to carry out adhesion detection of comprehensive safety detection device 1 point
It is not connected across the both ends of positive relay 10 and cathode relay 11.Enable the first gathering line, the second gathering line, third gathering line and
The voltage of 4th gathering line is respectively V1, V2, V3 and V4, then MCU module 14 only needs to sample this 4 voltage values respectively.If
Otherwise V1=V2 can be determined that then can be determined that for positive relay 10 be attracting state at this time as off-state.Similarly bear
Pole relay 11 is also that identical differentiation if V3=V4 can be determined that for cathode relay 11 be attracting state at this time, no
It then can be determined that as off-state.
In one embodiment, comprehensive safety detection device 1 can make PACK and vehicle body in the case where high pressure does not power on
Insulation monitoring and short-circuit detecting are connected across the both ends of positive relay 10 and cathode relay 11 using a biggish resistance,
Whether logical MCU module 14 goes control resistance access, the circuit of a high impedance is simulated in this way, circuit is allowed to have a faint electric current
It flows through.MCU module 14 can the unusual insulation characterisitic in accurate detection circuit and short by balanced bridge circuit module 12 in this way
Road situation.
In one embodiment, comprehensive safety detection device 1 is transmitted to external device (ED) with CAN network, RS485 or RS232 and is believed
Breath, furthermore, external device (ED) includes BCU, VCU or BMS.
In one embodiment, MCU module 14 also can be used to monitor the power-up state of BMS.
Referring to Fig. 3, Fig. 3 is the overhaul flow chart of the comprehensive safety detection device of one embodiment of the invention.As shown,
In one embodiment, MCU module 14 can sequentially carry out step S1 short-circuit detecting, S2 Insulation monitoring and S3 adhesion detection, and
Step S4 is with CAN network, RS485 or RS232, respectively to BCU, VCU or BMS transmitting short-circuit detecting, Insulation monitoring or adhesion inspection
The testing result of survey.
In conclusion due to comprehensive safety detection device of the invention by MCU module and positive relay, cathode after
First to the 4th gathering line included by electric appliance carries out adhesion detection, and passes through MCU module and positive relay, cathode relay
Device, balanced bridge circuit module and resistive module carry out Insulation monitoring or short-circuit detecting, in other words, comprehensive safety inspection of the invention
Short-circuit detecting, Insulation monitoring or adhesion detection can be carried out simultaneously by surveying device.In addition, comprehensive safety detection device of the invention can also
Flexibly with the various communication modes such as CAN network, RS485 or RS232, information is transmitted to BCU, VCU or other equipment, abundant gram
Possessed problem in the prior art is taken.
By the description of the above preferred embodiment, one skilled in the art is of the invention when can more understand
Feature and spirit, only above-described embodiment only illustrates the principle of the present invention and its effect, rather than to limit the present invention.Therefore,
The modification and change without departing from spirit of the invention, and interest field Ying Ruquan of the invention that any pair of above-described embodiment carries out
Listed by sharp claim.
Claims (6)
1. a kind of comprehensive safety detection device, which is characterized in that the comprehensive safety detection device includes:
The both ends of positive relay, the anode relay are respectively provided with the first gathering line and the second gathering line；
Cathode relay, the both ends of the cathode relay are respectively provided with third gathering line and the 4th gathering line；
Balanced bridge circuit module is connected between the positive relay and the cathode relay；
Resistive module is connected across the both ends of the positive relay and the cathode relay；And
Microcontroller is connect with the resistive module, to carry out short-circuit detecting, Insulation monitoring or adhesion detection.
2. comprehensive safety detection device as described in claim 1, which is characterized in that the comprehensive safety detection device is in height
In the case that pressure does not power on, the short-circuit detecting or the Insulation monitoring are carried out.
3. comprehensive safety detection device as described in claim 1, which is characterized in that the comprehensive safety detection device is with local
It controls network, serial communication and transmits information to external device (ED).
4. comprehensive safety detection device as claimed in claim 3, which is characterized in that the external device (ED) includes battery management system
System controller, entire car controller or other electronic control units.
5. comprehensive safety detection device as claimed in claim 4, which is characterized in that the micro-control unit is also to monitor
State the power-up state of battery management system.
6. comprehensive safety detection device as claimed in claim 3, which is characterized in that the information include the short-circuit detecting,
The Insulation monitoring or the testing result of adhesion detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710946733.8A CN109669128A (en) | 2017-10-12 | 2017-10-12 | Comprehensive safety detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710946733.8A CN109669128A (en) | 2017-10-12 | 2017-10-12 | Comprehensive safety detection device |
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| CN109669128A true CN109669128A (en) | 2019-04-23 |
Family
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| CN201710946733.8A Withdrawn CN109669128A (en) | 2017-10-12 | 2017-10-12 | Comprehensive safety detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022135554A1 (en) * | 2020-12-25 | 2022-06-30 | 中国第一汽车股份有限公司 | Detection method for vehicle high-voltage circuit, device, vehicle, and storage medium |
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Application publication date: 20190423 |