CN107623478A - A kind of electric machine controller charge/discharge control circuit for meeting functional safety - Google Patents
A kind of electric machine controller charge/discharge control circuit for meeting functional safety Download PDFInfo
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- CN107623478A CN107623478A CN201711001286.5A CN201711001286A CN107623478A CN 107623478 A CN107623478 A CN 107623478A CN 201711001286 A CN201711001286 A CN 201711001286A CN 107623478 A CN107623478 A CN 107623478A
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- 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
- Y02T10/64—Electric machine technologies in electromobility
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of electric machine controller charge/discharge control circuit for meeting functional safety, including low pressure energy-storage module, low-pressure control module, high and low voltage isolation module and Switch Control Discharge module, wherein, the low-pressure control module output end is connected with high and low voltage isolation module input respectively with low pressure energy-storage module output end, the Switch Control Discharge module input is connected with high and low voltage isolation module output end and cell voltage respectively, the Switch Control Discharge module includes control unit, discharge cell and bus Support Capacitor, wherein, described control unit is in parallel with bus Support Capacitor after being connected with discharge cell, after the control power supply receives discharge signal, the electricity stored in bus Support Capacitor is released to below safe voltage by control discharge cell.Beneficial effects of the present invention are：Circuit is safer, and threat of the high-tension electricity to human pilot and operating personnel is eliminated；Electric discharge is more quick, reliable.
Description
Technical field
The present invention relates to electric machine controller electric discharge field, more particularly to a kind of electric machine controller electric discharge for meeting functional safety
Control circuit.
Background technology
New-energy electric vehicle is because its energy-saving and emission-reduction, pollution are small, to the clean highly beneficial of environment and air, noise is low,
Energy efficiency is high, enjoys market and the favor of consumers in general, and still, batteries of electric automobile voltage is generally all high-tension electricity, holds
Life easily to personnel threatens；The problem of generally we are in order to reduce controller input ripple and IGBT energy storage nearby, meeting
The larger electric capacity of one capacity is set inside controller, and electric capacity can store on electric machine controller after electricity compared with multi-charge,
If no related discharge circuit is difficult within a short period of time, rapidly to discharge substantial amounts of electric charge after power-off；It is existing frequently-used
Be exactly to be directly connected to a power resistor at the positive and negative both ends of bus, if only using a power resistor as discharging back
Road, the power of resistance and the demand of volume are larger, and certain electric energy can be not only lost by working long hours, and reduce in battery durable
Journey, it can also increase the heat of controller complete machine, controller power consumption and heating problem are all to motor caused by long-term, continuous discharge
Larger test, meanwhile, volume to controller and radiating all serve negative impact, and design band to us is many
Unfavorable factor.
And automobile function safety is by automobile industry, the strong interest of manufacturer, vehicle factor and consumer, automobile in recent years
Functional safety ISO26262 certifications also turn into the core competitiveness of major new high-tech industry.Wherein functional safety essence is control
Risk, injury is reduced, for disabler, takes safe measure to control risk.
Residual voltage can not be released to safety value immediately on bus capacitor after high voltage power supply power-off, may to after-sales service,
The life of the operating personnel such as test causes get an electric shock threat and a series of serious safety problems.
The content of the invention
To solve the problems of the prior art, the present invention provides a kind of electric machine controller control of discharge for meeting functional safety
Circuit, in terms of loss caused by electrion has the hidden danger for being possible to forget electric discharge and continuous discharge, it can effectively control and put
Electric operational failure, so as to effectively be protected to circuit and personal security aspect.
The present invention includes low pressure energy-storage module, low-pressure control module, high and low voltage isolation module and Switch Control Discharge module,
Wherein, the low-pressure control module output end and low pressure energy-storage module output end respectively with high and low voltage isolation module input phase
Even, the Switch Control Discharge module input is connected with high and low voltage isolation module output end and cell voltage respectively, described to open
Closing control discharge module includes control unit, discharge cell and bus Support Capacitor, wherein, described control unit and discharge cell
In parallel with bus Support Capacitor after series connection, after the control power supply receives discharge signal, bus is supported electricity by control discharge cell
The electricity stored in appearance is released to below safe voltage.
The present invention is further improved, and the high and low voltage isolation module is isolation optocoupler U2, the original of the isolation optocoupler U2
Side is connected with low pressure energy-storage module, low-pressure control module respectively, secondary and the Switch Control Discharge module of the isolation optocoupler U2
It is connected.
The present invention is further improved, and the Switch Control Discharge module also includes partial pressure unit, voltage regulation unit, wherein,
Described partial pressure unit one end is connected with the discharge cell and bus Support Capacitor one end of anode and parallel connection respectively, the partial pressure
Power pins of the unit other end respectively with voltage regulation unit one end, isolation optocoupler U2 are connected, the other end point of the voltage regulation unit
GND and discharge cell and the bus Support Capacitor other end in parallel are not connect.
The present invention is further improved, and the voltage regulation unit is electric capacity C1 and voltage-regulator diode D2 in parallel, wherein, it is described
Voltage-regulator diode negative pole connects partial pressure unit, and positive pole connects GND.
The present invention is further improved, and the partial pressure unit is the resistance of multiple series connection.
The present invention is further improved, and the discharge cell is power resistor R23, and described control unit is IGBT device,
Wherein, the gate pole of the IGBT connects the secondary of isolation optocoupler, the collector and emitter and power of the IGBT by resistance R1
Bus support resistance C2 both ends are attempted by after resistance R23 series connection.
The present invention is further improved, and the low pressure energy-storage module includes connected low-voltage power supply isolated location and energy storage list
Member, wherein, the input termination outer low pressure dc source of the low pressure energy-storage module, the low pressure energy-storage units connect isolation optocoupler
U2 pin 1, uninterrupted turn-on power is provided for isolation optocoupler primary side.
The present invention is further improved, and the low-pressure control module includes two-stage NPN switching tube Q5/Q2, wherein, two-stage
NPN switching tubes Q5/Q2 input termination electric discharge Enable Pins, output termination isolation optocoupler U2 pin 2.
Compared with prior art, the beneficial effects of the invention are as follows：Circuit is safer, by high-tension electricity to human pilot and behaviour
Make the threat of personnel to eliminating；Electric discharge is more quick, reliable, and the time can obtain control to a certain extent, can have
Low-voltage power supply or without low-voltage power supply in the case of quickly high-tension electricity is discharged into below 60V safe rangies, while and can expires
Electrion safe class ASIL A in sufficient ISO26262 functional safeties；Power consumption and caused heat caused by solving continuous discharge
The temperature rise test to controller is measured, relatively reduces the installing space of power resistor.
Brief description of the drawings
Fig. 1 is circuit structure block diagram of the present invention；
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
The present invention is described in further details with reference to the accompanying drawings and examples.
As shown in figure 1, the present invention includes low pressure energy-storage module, low-pressure control module, high and low voltage isolation module and switch control
Discharge module processed, wherein, the low-pressure control module output end and low pressure energy-storage module output end respectively with high and low voltage isolation mould
Block input is connected, the Switch Control Discharge module input respectively with high and low voltage isolation module output end and cell voltage phase
Even, the Switch Control Discharge module includes control unit, discharge cell and bus Support Capacitor, wherein, described control unit
In parallel with bus Support Capacitor after being connected with discharge cell, after the control power supply receives discharge signal, control discharge cell will
The electricity stored in bus Support Capacitor is released to below safe voltage.
This example, so that discharge circuit is relatively reliable, prevents discharge cell from holding by increasing control module to discharge cell
The temperature rise test of power consumption and caused heat caused by continuous electric discharge to controller, relatively reduce the installing space of discharge cell.
Electric discharge is more quick, reliable, and the time can obtain control to a certain extent, can meet the high pressure in ISO26262 functional safeties
Discharge safe class ASIL A.
As shown in Fig. 2 as one embodiment of the invention, the high and low voltage isolation module is isolation optocoupler U2, it is described every
Primary side from optocoupler U2 is connected with low pressure energy-storage module, low-pressure control module respectively, the secondary and switch of the isolation optocoupler U2
Control discharge module is connected.
By the setting of high and low voltage isolation module, the high-pressure side that low-voltage power supply side and BMS power can be efficiently separated, increased
Add the security of whole circuit.
The Switch Control Discharge module also includes partial pressure unit, voltage regulation unit, wherein, partial pressure unit one end difference
With anode and parallel connection discharge cell and bus Support Capacitor one end be connected, the partial pressure unit other end respectively with voltage stabilizing
Unit one end, isolation optocoupler U2 power pins are connected, and the other end of the voltage regulation unit connects GND and parallel connection respectively
Discharge cell and the bus Support Capacitor other end.
This example voltage regulation unit is in parallel electric capacity C1 and voltage-regulator diode D2, wherein, the voltage-regulator diode negative pole connects point
Unit is pressed, positive pole connects GND.Partial pressure unit is the resistance R3 of multiple series connection, is herein the simple technique of painting, the discharge cell
For power resistor R23.
Described control unit is preferably the IGBT device with high-voltage great-current characteristic, when controller voltage is up to 300V very
To being also suitable for more than 500V.Wherein, the gate pole of the IGBT connects the secondary of isolation optocoupler, the collection of the IGBT by resistance R1
Electrode and emitter stage are attempted by bus support resistance C2 both ends after being connected with power resistor R23.IGBT(Insulated Gate
Bipolar Transistor), insulated gate bipolar transistor, it is by BJT (double pole triode) and MOS (insulated-gate type fields
Effect pipe) composition compound full-control type voltage driven type power semiconductor, have MOSFET high input impedance and GTR concurrently
Low conduction voltage drop of both advantage.Certainly, if the voltage of controller can also select in below 300V, described control unit
With other switch controlleds.
Battery management system（BMS）High-tension electricity can pass through resistance R3（Or multiple resistant series）Partial pressure is carried out, wherein,
Resistance R3 selects larger valued resistor, then make it that the driving of discharge control switch pipe is good by voltage-regulator diode D2 voltage stabilizing
Stabilization is in certain value, so that voltage stabilization is opened in the range of required voltage in Q1, makes whole Switch Control Discharge module
Stability is more preferable, and electric discharge is relatively reliable.
This example low pressure energy-storage module includes connected low-voltage power supply isolated location and energy-storage units, wherein, the low pressure storage
The input termination outer low pressure dc source of energy module, the low pressure energy-storage units connect isolation optocoupler U2 pin 1, to isolate light
Coupling primary side provides uninterrupted turn-on power.The energy-storage units of this example are polar capacitor C5, and the low-voltage power supply isolated location is two
Pole pipe D1, low-tension supply are exported by diode D1 negative poles.
The purpose of this example polar capacitor C5 setting is：In the case where low pressure has electricity, polar capacitor C5 can carry out charging storage
Can, the electric discharge of short time is carried out after low-voltage power-off, turns on the isolation optocoupler U2 short time, the switching tube IGBT of rear class is in short-term
Between conducting carry out repid discharge.The time that the low-pressure side polar capacitor C5 power supplies of this example maintain can reach 5s, so as to ensure this
The on high-tension side discharge cell of example discharges in 4S.It is that this example meets one of emphasis of functional safety to set herein, so that this
Example electric discharge is more quick, reliable, and the time can obtain control to a certain extent, can have low-voltage power supply or without low-voltage power supply
In the case of quickly high-tension electricity is discharged into below 60V safe rangies.
This example low-pressure control module includes two-stage NPN switching tube Q5/Q2, wherein, two-stage NPN switching tube Q5/Q2 inputs
Connect electric discharge Enable Pin, output termination isolation optocoupler U2 pin 2, Q5 and Q2 grounded emitter.It is logical that the electric discharge of this example is enabled
Cross CPU to send, controller can also be directly set, electric discharge instruction is sent, so as to control whole circuit discharging.
The operation principle of this example is：CPU, which enables pin, can be given to one electric discharge enable signal of charge/discharge control circuit, then should
Logical transition processing is carried out by two-stage triode Q5 and Q2 after signal arrival low-pressure control module（Triode operation is in switch shape
State）, wherein meeting under the booster action of the low pressure energy-storage module of the power outage security electric discharge of functional safety, there is provided isolation optocoupler U2
Primary side power supply so that isolation optocoupler U2 can continue for control signal to be delivered to follow-up IGBT Q1 and power resistor R23, herein
IGBT be that switch controlled power resistor R23 is discharged, a large amount of electricity for storing high pressure lateral capacitance so after power-off
Lotus progress is quick, safe and reliable to be released to below safe voltage 60V, well below the most short standard of country in time control
3S grows.
Work-based logic：When low tension works, the storage capacitor C5 of side is controlled to be electrically charged rear storage energy, when low pressure is electrically disconnected
Afterwards, storage capacitor C5 is discharged over the ground by isolation optocoupler U2, and hardware controls isolation optocoupler U2 works at the appointed time, so as to for
IGBT is provided and is opened required voltage, when the storage capacitor energy of low-pressure side is not enough to maintain isolation optocoupler U2 work, high pressure
Side stops electric discharge.
After high-pressure side BMS power-off, in the case that low pressure do not power off, discharge control signal（Low level）Opened through two-stage NPN
After closing pipe Q5/Q2,（Q5 ends, Q2 conductings）To isolation optocoupler U2 2 pin, low-tension supply LVDC15V passes through one-way conduction two
Pole pipe D1 powers to 1 pin to isolation optocoupler U2, now, 2 pin low levels, turns on principle according to isolation optocoupler U2, now isolates light
Coupling U2 is turned on, and at the same time controlling switch Q1 will be turned on so that power resistor R23 starts to being stored in bus Support Capacitor C2
Electric charge release being discharged into below safety value 60V.
This example isolation optocoupler U2 secondary side（High-pressure side）Power supply mode difference have multiple schemes；Switching Power Supply power or
Then TVS voltage-stabiliser tubes mode power.This example circuit reliably gives in circuit discharge control switch also using voltage-stabiliser tube voltage stabilizing
It is that control unit provides stable driving voltage so that electric discharge is reliable, safety, while improves the security of system.
Circuit of the present invention is safer, and residual voltage can not be released to peace immediately on bus capacitor after high voltage power supply power-off
Total head, the life of the operating personnel such as after-sales service, test, which may be caused, to get an electric shock threatens to eliminating；And can meets simultaneously
Electrion safe class ASIL A in ISO26262 functional safeties；Power consumption and caused heat caused by solving continuous discharge
Temperature rise test to controller, relatively reduce the installing space of power resistor.
Embodiment described above is the better embodiment of the present invention, not limits the specific of the present invention with this
Practical range, the scope of the present invention includes being not limited to present embodiment, all equal according to the equivalence changes of the invention made
Within the scope of the present invention.
Claims (8)
- A kind of 1. electric machine controller charge/discharge control circuit for meeting functional safety, it is characterised in that：Including low pressure energy-storage module, low Control module, high and low voltage isolation module and Switch Control Discharge module are pressed, wherein, the low-pressure control module output end and low pressure Energy-storage module output end is connected with high and low voltage isolation module input respectively, the Switch Control Discharge module input respectively with High and low voltage isolation module output end is connected with cell voltage, and the Switch Control Discharge module includes control unit, discharge cell With bus Support Capacitor, wherein, described control unit is in parallel with bus Support Capacitor after being connected with discharge cell, it is described control electricity After source receives discharge signal, the electricity stored in bus Support Capacitor is released to below safe voltage by control discharge cell.
- 2. the electric machine controller charge/discharge control circuit according to claim 1 for meeting functional safety, it is characterised in that：It is described High and low voltage isolation module be isolation optocoupler U2, the isolation optocoupler U2 primary side respectively with low pressure energy-storage module, low voltage control mould Block is connected, and the secondary of the isolation optocoupler U2 is connected with Switch Control Discharge module.
- 3. the electric machine controller charge/discharge control circuit according to claim 2 for meeting functional safety, it is characterised in that：It is described Switch Control Discharge module also include partial pressure unit, voltage regulation unit, wherein, described partial pressure unit one end respectively with anode and Discharge cell and bus Support Capacitor one end in parallel is connected, the partial pressure unit other end respectively with voltage regulation unit one end, every Power pins from optocoupler U2 are connected, and the other end of the voltage regulation unit connects GND and discharge cell in parallel and mother respectively The line Support Capacitor other end.
- 4. the electric machine controller charge/discharge control circuit according to claim 3 for meeting functional safety, it is characterised in that：It is described Voltage regulation unit is electric capacity C1 and voltage-regulator diode D2 in parallel, wherein, the voltage-regulator diode negative pole connects partial pressure unit, and positive pole connects GND.
- 5. the electric machine controller charge/discharge control circuit according to claim 4 for meeting functional safety, it is characterised in that：It is described Partial pressure unit is the resistance of multiple series connection.
- 6. the electric machine controller charge/discharge control circuit according to claim 5 for meeting functional safety, it is characterised in that：It is described Discharge cell is power resistor R23, and described control unit is IGBT device, wherein, the gate pole of the IGBT is connect by resistance R1 The secondary of isolation optocoupler, the collector and emitter of the IGBT are attempted by bus support resistance after being connected with power resistor R23 C2 both ends.
- 7. the electric machine controller charge/discharge control circuit for meeting functional safety according to claim 2-6, it is characterised in that：Institute Stating low pressure energy-storage module includes connected low-voltage power supply isolated location and energy-storage units, wherein, the low pressure energy-storage module it is defeated Enter to terminate outer low pressure dc source, the low pressure energy-storage units connect isolation optocoupler U2 pin 1, provided for isolation optocoupler primary side Uninterrupted turn-on power.
- 8. the electric machine controller charge/discharge control circuit according to claim 7 for meeting functional safety, it is characterised in that：It is described Low-pressure control module includes two-stage NPN switching tube Q5/Q2, wherein, two-stage NPN switching tubes Q5/Q2 input termination electric discharge Enable Pins, Output termination isolation optocoupler U2 pin 2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711001286.5A CN107623478A (en) | 2017-10-24 | 2017-10-24 | A kind of electric machine controller charge/discharge control circuit for meeting functional safety |
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| CN201711001286.5A CN107623478A (en) | 2017-10-24 | 2017-10-24 | A kind of electric machine controller charge/discharge control circuit for meeting functional safety |
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| CN201711001286.5A Pending CN107623478A (en) | 2017-10-24 | 2017-10-24 | A kind of electric machine controller charge/discharge control circuit for meeting functional safety |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233721A (en) * | 2018-03-21 | 2018-06-29 | 精进电动科技股份有限公司 | A kind of low-voltage power supply circuit |
| CN108551255A (en) * | 2018-04-19 | 2018-09-18 | 北京新能源汽车股份有限公司 | Electric automobile and high-voltage system, high-voltage discharge circuit thereof |
| CN110871688A (en) * | 2019-11-06 | 2020-03-10 | 北京动力源新能源科技有限责任公司 | Motor controller, motor driving system and new energy automobile |
| CN114206656A (en) * | 2019-08-14 | 2022-03-18 | 纬湃科技有限责任公司 | Circuit arrangement for discharging at least one energy store charged to high voltage |
| CN118137815A (en) * | 2024-05-08 | 2024-06-04 | 成都天一国泰真空设备有限公司 | Quick discharge circuit for ACC power supply of radio frequency ion source |
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| CN104868708A (en) * | 2015-06-05 | 2015-08-26 | 卢雪明 | Power-on buffering and bus discharge circuit for frequency converter |
| CN105437981A (en) * | 2015-11-24 | 2016-03-30 | 安徽江淮汽车股份有限公司 | High-voltage discharge control system for vehicle |
| CN106585408A (en) * | 2016-12-14 | 2017-04-26 | 广东力科新能源有限公司 | Power management circuit for electric vehicle |
| CN207612217U (en) * | 2017-10-24 | 2018-07-13 | 深圳市大地和电气股份有限公司 | A kind of electric machine controller charge/discharge control circuit meeting functional safety |
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| CN104393586A (en) * | 2014-12-04 | 2015-03-04 | 安徽巨一自动化装备有限公司 | Capacitor active discharge circuit of motor controller for electric automobile |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233721A (en) * | 2018-03-21 | 2018-06-29 | 精进电动科技股份有限公司 | A kind of low-voltage power supply circuit |
| CN108551255A (en) * | 2018-04-19 | 2018-09-18 | 北京新能源汽车股份有限公司 | Electric automobile and high-voltage system, high-voltage discharge circuit thereof |
| CN114206656A (en) * | 2019-08-14 | 2022-03-18 | 纬湃科技有限责任公司 | Circuit arrangement for discharging at least one energy store charged to high voltage |
| CN110871688A (en) * | 2019-11-06 | 2020-03-10 | 北京动力源新能源科技有限责任公司 | Motor controller, motor driving system and new energy automobile |
| CN118137815A (en) * | 2024-05-08 | 2024-06-04 | 成都天一国泰真空设备有限公司 | Quick discharge circuit for ACC power supply of radio frequency ion source |
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