CN106427583A - Protection and control method for high voltage in electric vehicle - Google Patents
Protection and control method for high voltage in electric vehicle Download PDFInfo
- Publication number
- CN106427583A CN106427583A CN201611024456.7A CN201611024456A CN106427583A CN 106427583 A CN106427583 A CN 106427583A CN 201611024456 A CN201611024456 A CN 201611024456A CN 106427583 A CN106427583 A CN 106427583A
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- Prior art keywords
- battery
- contactor
- always
- voltage
- trigger
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Classifications
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- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
-
- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/12—Recording operating variables ; Monitoring of operating variables
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a protection and control method for high voltage in an electric vehicle. The method comprises the following steps that 1, a battery management system reads the state of a battery total positive contactor and the non-battery end voltage values, between a battery high-voltage positive pole and a battery high-voltage negative pole on the vehicle-mounted high-voltage electric appliance side, of the battery total positive contactor and a battery total negative contactor, if the battery total positive contactor is switched off, the non-battery end voltage of the battery total positive contactor and the battery total negative contactor is in a rising process, and when the non-battery end voltage is larger than a set value, the battery total negative contactor and the battery total positive contactor are switched on for high-voltage protection and control; 2, power battery total charging current is read in the high-voltage protection process, and if the battery total charging current is kept smaller than a certain value for a certain time, it is judged that high-protection protection and control quits. According to the method, the safety of a high-voltage direct-current component applied in the electric vehicle is protected.
Description
Technical field
The present invention relates to a kind of electric automobile inner high voltage protects control method.
Background technology
With the development of electric vehicle industrialization, the security of electric automobile is also increasingly paid close attention to by people.Electronic
One important feature of automobile is exactly the in-car high tension loop equipped with the enough power performance of guarantee, and it is up to the voltage of more than 300V
Personal safety and the use safety of on-board high-voltage electrical appliance may be jeopardized, so for relatively conventional automobile, electric automobile is to it
Security performance and its protection are put forward higher requirement.
Practical structures according to electric automobile and circuit characteristic, the rational safeguard measure of design safety, it is to ensure that driver
Key with vehicle arrangement safe operation.
Invention entitled " high-voltage protective system of electric automobile and method ", the applying date are 2013-10-30, Application No.
201310529334.3 system disclosed in Chinese patent include：Battery pack structure, air bag, compressor, adding thermal resistance, electricity
Machine controller, car load ECU, the first switch being connected with car load ECU, second switch and the 3rd switch, such that it is able in car load ECU
When air bag is detected and opening, or when the operating voltage of electric automobile is less than default total voltage signal, or current of electric is more than
During electric motor protecting electric current, disconnect first switch；In the case of first switch closure, when car load ECU detects compressor current
During more than compressor protection electric current, disconnect second switch；In the case of first switch closure, when car load ECU detects heating
When resistor current is more than adding thermal resistance protective current, disconnect the 3rd switch, the method is used at battery and vehicle-mounted electrical circuit
The high voltage protective to electric automobile under channel status.
Content of the invention
It is an object of the invention to overcoming the shortcomings of prior art, provide a kind of can be in the state of battery always just disconnection
Under, by detecting battery always positive contactor and the battery always change of the non-battery terminal voltage value of negative contactor and battery charge
Change control the high pressure of electric automobile protected.
In order to achieve the above object, the technical solution used in the present invention is：
A kind of electric automobile inner high voltage protects control method, comprises the following steps：
(1) battery management system read battery always positive contactor state and battery always positive contactor is always born with battery and is contacted
Non-battery terminal voltage value between on-board high-voltage electrical appliance side battery high-voltage positive electrode and battery high voltage negative for the device, if battery is total just
Contactor disconnects, and battery always always bear the non-battery terminal voltage of contactor and be in uphill process by positive contactor and battery, and is more than
During setting value, then closure battery always bear contactor and battery always positive contactor to carry out high voltage protective control；
(2) during high voltage protective read the total charging current of electrokinetic cell, if the total charging current of battery continue 20 seconds-
It is less than 500mA value within 40 seconds, battery management system then gathers key signal, vehicle-mounted charge trigger, soon charging trigger,
If key signal be close, vehicle-mounted charge trigger is not enabled on, soon charging trigger be not enabled on, disconnect battery total just
Contactor always born by contactor and battery；If collection key signal, vehicle-mounted charge trigger, soon certain in charging trigger
One tunnel trigger is triggered, and the triggering of execution corresponding signal processes strategy, is opened or closed electricity according to the corresponding strategy that processes
Always contactor always born by positive contactor and battery to Chi.
Compared with prior art, the invention has the advantages that：Protected in electric automobile using the inventive method
The safety of application HVDC part.
Brief description
Fig. 1 is the high-voltage electrical apparatus schematic diagram of existing electric automobile；
Fig. 2 is a kind of control strategy flow chart of electric automobile inner high voltage protection control method of the present invention.
Specific embodiment
Describe the present invention with reference to specific embodiments and the drawings.
The inventive method is the side adopting on the basis of not changing the high-voltage electrical apparatus attachment structure of existing electric automobile
Method.The structure of this existing cell high voltage loop is as shown in Figure 1：The left side of battery high-voltage positive electrode and battery high voltage negative it
Between by circuit connecting wire be connected in series with electrokinetic cell 1 and always bear contactor 2, described battery high-voltage positive electrode is connected with
Two branch roads being arranged in parallel each other, a branch road is connected with always positive contactor 3, and another branch road is connected in series with preliminary filling
Electrical relay 4 and preliminary filling resistance, are connected by circuit between described battery high-voltage positive electrode and the right side of battery high voltage negative
Line is connected with on-board high-voltage electrical appliance.In figure A-B end is always to bear contactor, always positive contactor battery terminal voltage, and C-D end is always to bear
Contactor, always positive contactor non-battery terminal voltage.During in figure main contactor closure, the voltage at main contactor two ends is 12V, disconnects
When main contactor two ends voltage be 0V, always bear contactor, pre-charge-relay in the same manner.
The inventive method is to be in the protection to electric automobile high-voltage under off state in battery and vehicle-mounted electrical circuit.
A kind of electric automobile inner high voltage protection control method of the present invention, comprises the following steps：
(1) always positive contactor state (closure or disconnection) and battery always just contact battery management system reading battery
Non-battery end between on-board high-voltage electrical appliance side battery high-voltage positive electrode and battery high voltage negative for the contactor always born by device and battery
Magnitude of voltage, if battery always positive contactor disconnects, battery always always bear the non-battery terminal voltage of contactor and be in by positive contactor and battery
Uphill process, and during more than setting value (being generally chosen between the 80% to 90% of battery peak voltage), then close battery
Always bear contactor and battery always positive contactor to carry out high voltage protective control；
(2) during high voltage protective read the total charging current of electrokinetic cell, if the total charging current of battery continue 20 seconds-
It is less than 500mA value within 40 seconds, battery management system then gathers key signal, vehicle-mounted charge trigger, soon charging trigger,
If key signal be close, vehicle-mounted charge trigger is not enabled on, soon charging trigger be not enabled on, disconnect battery total just
Contactor always born by contactor and battery；If collection key signal, vehicle-mounted charge trigger, soon certain in charging trigger
One tunnel trigger is triggered, and the triggering of execution corresponding signal processes strategy, is opened or closed electricity according to the corresponding strategy that processes
Always contactor always born by positive contactor and battery to Chi.
Embodiment 1
(1) always positive contactor state (closure or disconnection) and battery always just contact battery management system reading battery
Non-battery end between on-board high-voltage electrical appliance side battery high-voltage positive electrode and battery high voltage negative for the contactor always born by device and battery
Magnitude of voltage, if battery always positive contactor disconnects, battery always always bear the non-battery terminal voltage of contactor and be in by positive contactor and battery
Uphill process, and more than battery peak voltage 80% when, then closure battery always bear contactor and battery always positive contactor with
Carry out high voltage protective control；
(2) read the total charging current of electrokinetic cell during high voltage protective, if the total charging current of battery continues 20 seconds
Less than 500mA value, battery management system then gathers key signal, vehicle-mounted charge trigger, soon charging trigger, if key
Spoon signal be close, vehicle-mounted charge trigger be not enabled on, soon charging trigger be not enabled on, then disconnect battery always just contact
Contactor always born by device and battery.
Can effective protection be under off state in battery and vehicle-mounted electrical circuit using this method, in electric automobile
The safety of application HVDC part.
Embodiment 2
(1) always positive contactor state (closure or disconnection) and battery always just contact battery management system reading battery
Non-battery end between on-board high-voltage electrical appliance side battery high-voltage positive electrode and battery high voltage negative for the contactor always born by device and battery
Magnitude of voltage, if battery always positive contactor disconnects, battery always always bear the non-battery terminal voltage of contactor and be in by positive contactor and battery
Uphill process, and more than battery peak voltage 90% when, then closure battery always bear contactor and battery always positive contactor with
Carry out high voltage protective control；
(2) read the total charging current of electrokinetic cell during high voltage protective, if the total charging current of battery continues 40 seconds
Less than 500mA value, battery management system then gathers key signal, vehicle-mounted charge trigger, soon charging trigger；If adopting
Collection key signal, vehicle-mounted charge trigger, soon a certain road trigger in charging trigger be triggered, execution is corresponding
The triggering of signal processes strategy, is opened or closed battery always positive contactor is always born with battery and contacted according to the corresponding strategy that processes
Device.
Battery and vehicle-mounted electrical circuit can be under channel status and effectively exit high voltage protective using this law, prevent
The loss of battery electric quantity.
Embodiment 3
(1) always positive contactor state (closure or disconnection) and battery always just contact battery management system reading battery
Non-battery end between on-board high-voltage electrical appliance side battery high-voltage positive electrode and battery high voltage negative for the contactor always born by device and battery
Magnitude of voltage, if battery always positive contactor disconnects, battery always always bear the non-battery terminal voltage of contactor and be in by positive contactor and battery
Uphill process, and more than battery peak voltage 85% when, then closure battery always bear contactor and battery always positive contactor with
Carry out high voltage protective control；
(2) read the total charging current of electrokinetic cell during high voltage protective, if the total charging current of battery continues 30 seconds
Less than 500mA value, battery management system then gathers key signal, vehicle-mounted charge trigger, soon charging trigger, if key
Spoon signal be close, vehicle-mounted charge trigger be not enabled on, soon charging trigger be not enabled on, then disconnect battery always just contact
Contactor always born by device and battery.
Can effective protection be under off state in battery and vehicle-mounted electrical circuit using this method, in electric automobile
The safety of application HVDC part.
Claims (1)
1. a kind of electric automobile inner high voltage protection control method is it is characterised in that comprise the following steps：
(1) battery management system read battery always positive contactor state and battery always positive contactor and battery are always born contactor and are existed
Non-battery terminal voltage value between on-board high-voltage electrical appliance side battery high-voltage positive electrode and battery high voltage negative, if battery always just contacts
Device disconnects, and battery always always bear the non-battery terminal voltage of contactor and be in uphill process by positive contactor and battery, and more than setting
During value, then closure battery always bear contactor and battery always positive contactor to carry out high voltage protective control；
(2) read the total charging current of electrokinetic cell during high voltage protective, if the total charging current of battery continues 20 seconds -40 seconds
Less than 500mA value, battery management system then gathers key signal, vehicle-mounted charge trigger, soon charging trigger, if key
Spoon signal be close, vehicle-mounted charge trigger be not enabled on, soon charging trigger be not enabled on, then disconnect battery always just contact
Contactor always born by device and battery；If collection key signal, vehicle-mounted charge trigger, the soon a certain road in charging trigger
Trigger is triggered, and the triggering of execution corresponding signal processes strategy, is opened or closed battery according to corresponding process strategy total
Contactor always born by positive contactor and battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611024456.7A CN106427583B (en) | 2016-11-17 | 2016-11-17 | High voltage protective control method in a kind of electric vehicle |
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| CN201611024456.7A CN106427583B (en) | 2016-11-17 | 2016-11-17 | High voltage protective control method in a kind of electric vehicle |
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| CN106427583A true CN106427583A (en) | 2017-02-22 |
| CN106427583B CN106427583B (en) | 2018-09-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109823285A (en) * | 2017-11-20 | 2019-05-31 | 河南森源重工有限公司 | Electric system, power-on and power-off control method and control system above and below electric automobile high-voltage |
| CN113885516A (en) * | 2021-10-26 | 2022-01-04 | 天津易鼎丰动力科技有限公司 | Automatic driving domain controller of electric tractor and control method thereof |
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| CN203078325U (en) * | 2012-12-31 | 2013-07-24 | 上海大郡动力控制技术有限公司 | Protection system for preventing master contactor of vehicle-mounted motor control system from losing effectiveness |
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2016
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| CN102514495A (en) * | 2011-12-26 | 2012-06-27 | 天津清源电动车辆有限责任公司 | Structure for high voltage safety protection system during collision of electric automobiles and method for same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109823285A (en) * | 2017-11-20 | 2019-05-31 | 河南森源重工有限公司 | Electric system, power-on and power-off control method and control system above and below electric automobile high-voltage |
| CN113885516A (en) * | 2021-10-26 | 2022-01-04 | 天津易鼎丰动力科技有限公司 | Automatic driving domain controller of electric tractor and control method thereof |
| CN113885516B (en) * | 2021-10-26 | 2023-09-26 | 天津易鼎丰动力科技有限公司 | Automatic driving domain controller of electric tractor and control method thereof |
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| Publication number | Publication date |
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| CN106427583B (en) | 2018-09-07 |
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