CN110053514A - Electric vehicle and its high-voltage control circuit - Google Patents
Electric vehicle and its high-voltage control circuit Download PDFInfo
- Publication number
- CN110053514A CN110053514A CN201910174701.XA CN201910174701A CN110053514A CN 110053514 A CN110053514 A CN 110053514A CN 201910174701 A CN201910174701 A CN 201910174701A CN 110053514 A CN110053514 A CN 110053514A
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- Prior art keywords
- relay
- master
- control
- control terminal
- main negative
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
This application discloses a kind of electric vehicle and its high-voltage control circuit, which includes: power battery, which passes through main positive relay respectively and main negative relay is electrically connected to load；And battery management system, the battery management system are electrically connected the control terminal of control terminal and main negative relay in the positive relay of the master；The electric vehicle further includes controller, the controller is electrically connected to the control terminal of the positive relay of the master and/or the control terminal of main negative relay, the controller can obtain the status information of the positive relay of the master and/or main negative relay, and issue control signal to the control terminal of the control terminal of the positive relay of the master and/or main negative relay according to the status information.According to the above technical scheme, when battery management system failure cannot make to lead positive relay and/or main negative relay normally disconnects, can use controller disconnects the positive relay of winner and/or main negative relay in time.
Description
Technical field
This application involves electric vehicle fields, more specifically to a kind of electric vehicle and its high-tension circuit.
Background technique
In electric vehicle, the electrical system around power battery is one of the core system of electric vehicle.In electric vehicle
Battery management system BMS is provided in, for being managed to power battery.For example, BMS can control the master of power battery
The on off operating mode of positive relay and main negative relay, with realize electric vehicle power on and lower electricity.
However, in the actual moving process of electric vehicle, BMS inevitably trouble or failure the case where.
If necessary to which the failure of BMS occurs under electric vehicle system when electricity, then BMS can not send the positive relay of master and main negative relay
Open command to can not make to lead positive relay and lead negative relay to disconnect in time, and then causes system normally lower electric.
In view of this, how to improve the reliability of the high-voltage control circuit of electric vehicle, become what this field needed to solve
Technical problem.
Summary of the invention
In view of this, present applicant proposes the solution of a kind of electric vehicle and its high-voltage control circuit, so that electronic
The high-voltage control circuit of vehicle has good reliability.
According to the application, a kind of high-voltage control circuit of electric vehicle is proposed, which includes: power electric
Pond, which passes through main positive relay respectively and main negative relay is electricly connected in load；And battery management system, the electricity
Pond management system is electrically connected the control terminal of control terminal and main negative relay in the positive relay of the master；The electric vehicle
It further include controller, the controller is electrically connected to the control terminal of the positive relay of the master and/or the control terminal of main negative relay,
The controller can obtain the status information of the positive relay of the master and/or main negative relay, and according to the status information and
The control terminal of control terminal and/or main negative relay to the positive relay of the master issues control signal.
Preferably, when the controller receives lower electric signal, the shape of the positive relay of the master and/or main negative relay is acquired
State information, if the positive relay of the master and/or main negative relay disconnect not in time, the controller is to the positive relay of the master
The control terminal of device and/or the control terminal of main negative relay issue the control signal disconnected.
Preferably, in the controller lower electric signal is received and after scheduled time threshold value, if the positive relay of the master
Device and/or main negative relay do not disconnect, then control terminal and/or main negative relay of the controller to the positive relay of the master
Control terminal issues the control signal disconnected.
Preferably, the scheduled time threshold value is 1-5 seconds, further preferably 1-2 seconds.
Preferably, which includes low voltage control relay, which is normally closed relay,
And it is connected in the control loop of the control terminal of the positive relay of the master and/or leads the control loop of the control terminal of negative relay
In, the control terminal of the low voltage control relay is electrically connected with the controller.
Preferably, the control terminal of positive, the described positive relay of master of the low-tension supply of the battery management system and described
Low voltage control relay is sequentially connected in series and is grounded, to form the control loop of the control terminal of the positive relay of the master.
Preferably, the control terminal and the low pressure of the anode of the low-tension supply of the battery management system, main negative relay
Control relay is sequentially connected in series and is grounded, to form the control loop of the control terminal of the negative relay of the master.
Preferably, the control terminal of the control relay is electrically connected with the low-tension supply of the controller.
According to the another aspect of the application, electric vehicle is additionally provided, which has above-mentioned high-voltage control circuit,
The electric vehicle is preferably hybrid electric vehicle or pure electric vehicle.
According to the technical solution of the application, when occur battery management system failure be unable to control the main positive relay of cutting and/
Or when the case where master's negative relay, using as the controller of Redundancy Design, main positive relay and/or main negative relay can control
The cutting of device, to improve the reliability of the high-voltage control circuit of electric vehicle.
Other features and advantage are by the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present application, the schematic reality of the application
Mode and its explanation are applied for explaining the application.In the accompanying drawings:
Fig. 1 is the schematic diagram according to the high-voltage control circuit of the electric vehicle of the application preferred embodiment；
Fig. 2 is the circuit diagram for indicating the control terminal of controller and main positive relay and main negative relay.
Specific embodiment
The technical solution of the application is described in detail below with reference to the accompanying drawings and in conjunction with embodiment.
As shown in Figure 1, including: power battery according to the high-voltage control circuit of the electric vehicle of the application preferred embodiment
10, which is electrically connected to load 30 by main positive relay 21 and main negative relay 22 respectively；With battery management system
Unite BMS, and battery management system BMS is electrically connected the control of control terminal and main negative relay 22 in the positive relay 21 of the master
End processed；The electric vehicle further includes controller 40, wherein the controller 40 is electrically connected to the control of the positive relay 21 of the master
The control terminal of end processed and/or main negative relay 22, the controller 40 can obtain the positive relay 21 of the master and/or it is main it is negative after
The status information of electric appliance 22, and negative relay to the control terminal of the positive relay 21 of the master and/or is led according to the status information
22 control terminal issues control signal.
In traditional high-voltage control circuit, power battery 10 is connected to load 30 by main positive relay 21 in anode
The one end of (can be various vehicle-mounted power loads) is connected to the other end of load 30 in cathode by main negative relay 22, from
And form high tension loop.Main positive relay 21 and main negative relay 22 are the key devices for controlling high tension loop and being switched on or switched off,
The main relay is controlled by battery management system BMS.When receiving power on signal, battery management system BMS to it is main just after
Electric appliance 21 issues the control signal connected with the control terminal of main negative relay 22, to make to lead positive relay 21 and main negative relay
22 connect；When receiving lower electric signal, control terminal hair of the battery management system BMS to the positive relay 21 of master and main negative relay 22
The control signal disconnected out, to make to lead positive relay 21 and the main negative disconnection of relay 22.
And if can not make leading positive relay 21 and main negative relay 22 just when battery management system BMS breaks down
Often it is switched on or switched off, especially if when can not normally disconnect, serious safety problem can be brought.
In order to solve this problem, in the technical solution of the application, the controller as redundant safety scheme is increased
The control of 40 couples of masters positive relay 21 and main negative relay 22.Specifically, controller 40 can know main positive relay in real time
21 and main negative relay 22 work state information, such as known by detection system voltage, or directly extract relay
Contact position information and know.Meanwhile controller 40 be electrically connected to the positive relay 21 of the master control terminal and/or it is main negative after
The control terminal of electric appliance 22, therefore, controller 40 being capable of controls according to above-mentioned work state information and to the positive relay 21 of the master
The control terminal of end processed and/or main negative relay 22 issues control signal.
Especially, if controller knows that main positive relay 21 and main negative relay 22 should be disconnected but cannot be disconnected,
The control signal disconnected can be issued to the control terminal of the positive relay 21 of the master and/or the control terminal of main negative relay 22, from
And the control of the positive relay 21 of the master and main negative relay 22 is made not depend solely on battery management system BMS.
Controller 40 can be individual controller, can also be with entire car controller VCU or electronic control unit ECU.Control
The selection of device 40 processed or integrating for functional module, can select according to specific operating condition.
Under preferable case, electric vehicle generates lower electric signal according to the operation of driver, which can pass to
Controller 40.After electric signal under acquisition, usual battery management system BMS directly disconnect main positive relay 21 and/or it is main it is negative after
Electric appliance 22.Meanwhile controller 40 can acquire the current working status of main positive relay 21 and/or main negative relay 22.If
Due to battery management system BMS failure, the main positive relay 21 of the discovery of controller 40 and/or main negative relay 22 disconnect not in time
When, then controller 40 can be issued independently of the control terminal of control terminal and/or main negative relay 22 to the positive relay 21 of the master
The control signal of disconnection.
In the technical solution of the application, alternative scheme of the controller 40 as redundant safety, therefore relay positive for master
Device 21 and/or main negative relay 22 still depend on battery management system BMS.In order to avoid with battery management system BMS
Conflict, under preferable case, lower electric signal is received in the controller 40 and after scheduled time threshold value, if the master is just
Relay 21 and/or main negative relay 22 do not disconnect, then control terminal from the controller 40 to the positive relay 21 of the master and/or
The control terminal of main negative relay 22 issues the control signal disconnected.In other words, to battery management system BMS to the positive relay of master
21 and/or the grace time managed of main negative relay 22, in the case where battery management system BMS is determined and is failed, then by
Controller 40 in time manages the positive relay of master 21 and/or main negative relay 22.
Preferably, the scheduled time threshold value is 1-5 seconds, further preferably 1-2 seconds.
Controller 40 can realize the control of above-mentioned main relay in several ways, usually automatically controlled mode.Fig. 2
It is shown a kind of preferred embodiment, as shown in Fig. 2, shown high-voltage control circuit includes low voltage control relay 50, this is low
Voltage-controlled relay processed 50 be normally closed relay, and be connected on the positive relay 21 of the master control terminal control loop neutralize/
Or in the control loop of the control terminal of main negative relay 22, the control terminal of the low voltage control relay 50 and the controller 40
Electrical connection.Low voltage control relay 50 is since for normally closed relay, reliability is relatively strong, while type selecting is comparatively held
Easily.The preferred embodiment can simplify power on, lower electric current journey, facilitate reduce failure rate, guarantee vehicle safety.
In this embodiment, the low voltage control relay 50 controlled by controller VCU is using normally closed relay, normal
It does not need to control in upper and lower electric process, is in closed state always.
And working as battery management system BMS can not be such that the positive relay 21 of winner and/or main negative relay 22 disconnects, and under occurring
When electrical anomaly, controller 40 can just issue control signal to low voltage control relay 50.Specifically, if controller VCU is passed through
Spending one section of predetermined time does not receive the feedback information that main positive relay and/or main negative relay have disconnected, then controller is to low
Voltage-controlled relay processed 50 issues the instruction disconnected, so that high tension loop and power battery disconnect, guarantees electricity safety under vehicle.Together
When, state by normally closed is converted to danger that is normally opened, therefore avoiding high-tension circuit from powering on again to low voltage control relay 50 upon opening
Danger.
In the preferred embodiment of the application, battery management system and controller are formed together to the positive relay of master and master
Two sets of control loops of negative relay.As shown in Fig. 2, positive, the described master of the low-tension supply of the battery management system just after
The control terminal of electric appliance 21 and the low voltage control relay 50 are sequentially connected in series and are grounded, to form the positive relay of the master
The control loop of 21 control terminal.The anode of the low-tension supply of the battery management system, main negative relay 22 control terminal and
The low voltage control relay 50 is sequentially connected in series and is grounded, to form the control of the control terminal of the negative relay 22 of the master
Circuit.
As low voltage control relay 50, control terminal is electrically connected with the low-tension supply of the controller 40, although in figure
For 12V low-tension supply, but the application is without being limited thereto, or the low-tension supply of other types vehicle.
Main positive relay cannot be effectively managed when above in the application for battery management system BMS failure or failure
And/or the solution of main negative relay is described in detail.
As can be seen from the above description, according to the preferred embodiment of the application, when battery management system BMS failure, energy
Enough effectively cut off high-tension circuit.Therefore, the technical solution of presently filed embodiment security reliability with higher.
In addition, the electric vehicle has above-mentioned high-voltage control circuit present invention also provides electric vehicle.Foregoing circuit vehicle
Preferably hybrid electric vehicle or pure electric vehicle.
The preferred embodiment of the application is described in detail above, still, during the application is not limited to the above embodiment
Detail a variety of simple variants can be carried out to the technical solution of the application in the range of the technology design of the application, this
A little simple variants belong to the protection scope of the application.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the application to it is various can
No further explanation will be given for the combination of energy.
In addition, any combination can also be carried out between a variety of different embodiments of the application, as long as it is without prejudice to originally
The thought of application, it should also be regarded as the disclosure of the present invention.
Claims (9)
1. the high-voltage control circuit of electric vehicle, the high-voltage control circuit include:
Power battery (10), the power battery (10) are electrically connected to by main positive relay (21) and main negative relay (22) respectively
It loads (30)；With
Battery management system (BMS), the battery management system (BMS) are electrically connected in the control of the positive relay of the master (21)
The control terminal at end and main negative relay (22)；It is characterized in that, the electric vehicle further includes controller (40), wherein
The controller (40) is electrically connected to the control terminal of the positive relay of the master (21) and/or the control of main negative relay (22)
End, the controller (40) can obtain the status information of the positive relay of the master (21) and/or main negative relay (22), and root
Control is issued to the control terminal of the control terminal of the positive relay of the master (21) and/or main negative relay (22) according to the status information
Signal.
2. high-voltage control circuit according to claim 1, which is characterized in that the controller (40) is receiving lower electric signal
When, the status information of the positive relay of the master (21) and/or main negative relay (22) is acquired, if the positive relay of the master (21)
And/or main negative relay (22) disconnects not in time, then control terminal from the controller (40) to the positive relay of the master (21) and/
Or the control terminal of main negative relay (22) issues the control signal disconnected.
3. high-voltage control circuit according to claim 2, which is characterized in that receive lower electric signal in the controller (40)
And after scheduled time threshold value, if the positive relay of the master (21) and/or main negative relay (22) do not disconnect, the control
Device (40) processed issues the control disconnected to the control terminal of the positive relay of the master (21) and/or the control terminal of main negative relay (22)
Signal.
4. high-voltage control circuit according to claim 3, which is characterized in that the scheduled time threshold value is 1-5 seconds, into one
Step preferably 1-2 seconds.
5. high-voltage control circuit described in any one of -4 according to claim 1, which is characterized in that the high-voltage control circuit packet
Low voltage control relay (50) are included, which is normally closed relay, and is connected on the positive relay of the master
In the control loop of the control terminal of device (21) and/or in the control loop of the control terminal of main negative relay (22), the low pressure control
The control terminal of relay (50) processed is electrically connected with the controller (40).
6. high-voltage control circuit according to claim 5, which is characterized in that the low-tension supply of the battery management system
The control terminal and the low voltage control relay (50) of positive, the described positive relay of master (21) are sequentially connected in series and are grounded, from
And form the control loop of the control terminal of the positive relay of the master (21).
7. high-voltage control circuit according to claim 5, which is characterized in that the low-tension supply of the battery management system
Anode, the control terminal of main negative relay (22) and the low voltage control relay (50) are sequentially connected in series and are grounded, thus shape
At the control loop of the control terminal of the negative relay of the master (22).
8. high-voltage control circuit according to claim 5, which is characterized in that the control of the low voltage control relay (50)
End is electrically connected with the low-tension supply of the controller (40).
9. electric vehicle, which is characterized in that the electric vehicle has high voltage control electricity described in any one of claim 1-8
Road, the electric vehicle are preferably hybrid electric vehicle or pure electric vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910174701.XA CN110053514A (en) | 2019-03-08 | 2019-03-08 | Electric vehicle and its high-voltage control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910174701.XA CN110053514A (en) | 2019-03-08 | 2019-03-08 | Electric vehicle and its high-voltage control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110053514A true CN110053514A (en) | 2019-07-26 |
Family
ID=67316772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910174701.XA Pending CN110053514A (en) | 2019-03-08 | 2019-03-08 | Electric vehicle and its high-voltage control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110053514A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110949132A (en) * | 2019-11-08 | 2020-04-03 | 宝能(广州)汽车研究院有限公司 | Power battery system, control method thereof and vehicle |
| CN111907330A (en) * | 2020-07-15 | 2020-11-10 | 东风汽车股份有限公司 | Control method of main and negative relays of large integrated architecture of pure electric vehicle under communication fault |
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| CN105270181A (en) * | 2014-06-25 | 2016-01-27 | 广州汽车集团股份有限公司 | Intermediate relay control device, and control method thereof, and high-voltage power-down control method |
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| CN109094370A (en) * | 2017-06-20 | 2018-12-28 | 荣成华泰汽车有限公司 | The fault protection system of electric car |
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2019
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| JP2001078310A (en) * | 1999-09-08 | 2001-03-23 | Hitachi Ltd | Controller of electric vehicle and contactor control method |
| CN105270181A (en) * | 2014-06-25 | 2016-01-27 | 广州汽车集团股份有限公司 | Intermediate relay control device, and control method thereof, and high-voltage power-down control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110949132A (en) * | 2019-11-08 | 2020-04-03 | 宝能(广州)汽车研究院有限公司 | Power battery system, control method thereof and vehicle |
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Application publication date: 20190726 |