CN207612217U - A kind of electric machine controller charge/discharge control circuit meeting functional safety - Google Patents
A kind of electric machine controller charge/discharge control circuit meeting functional safety Download PDFInfo
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- CN207612217U CN207612217U CN201721380419.XU CN201721380419U CN207612217U CN 207612217 U CN207612217 U CN 207612217U CN 201721380419 U CN201721380419 U CN 201721380419U CN 207612217 U CN207612217 U CN 207612217U
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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 utility model provides a kind of electric machine controller charge/discharge control circuit 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 busbar Support Capacitor, wherein, described control unit is in parallel with busbar Support Capacitor after connecting with discharge cell, after the control power supply receives discharge signal, the electricity stored in busbar Support Capacitor is released to safe voltage or less by control discharge cell.The beneficial effects of the utility model are：Circuit is safer, and high-voltage electricity eliminates the threat of driver and operating personnel；Electric discharge is more quickly, reliably.
Description
Technical field
The present invention relates to electric machine controller electric discharge field more particularly to a kind of electric machine controller electric discharges meeting functional safety
Control circuit.
Background technology
New-energy electric vehicle is highly beneficial to the cleaning of environment and air because its energy-saving and emission-reduction, pollution are small, low noise,
Energy efficiency is high, receives market and the favor of consumers in general, and still, batteries of electric automobile voltage is usually all high-voltage electricity, holds
Easily threaten to the life of personnel；The problem of usually we are in order to reduce controller input ripple and IGBT energy storage nearby, meeting
The larger capacitance of one capacity is set inside controller, and capacitance can be stored after electric machine controller powers on compared with multi-charge,
If no related discharge circuit is difficult within a short period of time, rapidly to discharge a large amount of 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 busbar, 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 can also increase the heat of controller complete machine, and controller power consumption and heating problem are all to motor caused by long-term, continuous discharge
Larger test, meanwhile, volume and heat dissipation to controller all play negative impact, many to our design band
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 become the core competitiveness of major new high-tech industry.Wherein functional safety essence is control
Risk reduces injury, for disabler, safe measure is taken 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.
Invention content
To solve the problems of the prior art, the present invention provides a kind of electric machine controller control of discharge meeting functional safety
Circuit can be controlled effectively and be put in terms of the loss caused by electrion has the hidden danger for being possible to forget electric discharge and continuous discharge
Electric operational failure, to carry out effective protection to circuit and personnel safety 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
It includes control unit, discharge cell and busbar Support Capacitor to close control discharge module, wherein described control unit and discharge cell
In parallel with busbar Support Capacitor after series connection, after the control power supply receives discharge signal, busbar is supported electricity by control discharge cell
The electricity stored in appearance is released to safe voltage or less.
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 side 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 further includes partial pressure unit, voltage regulation unit, wherein
Described partial pressure unit one end is connected with the discharge cell and busbar Support Capacitor one end of anode and parallel connection respectively, the partial pressure
The unit other end is connected with the power pins of voltage regulation unit one end, isolation optocoupler U2 respectively, the other end point of the voltage regulation unit
The discharge cell and the busbar Support Capacitor other end of battery cathode and parallel connection are not connect.
The present invention is further improved, and the voltage regulation unit is the capacitance C1 and zener diode D2 of parallel connection, wherein described
Zener diode cathode connects partial pressure unit, and anode connects battery cathode.
The present invention is further improved, and the partial pressure unit is multiple concatenated resistance.
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 side of isolation optocoupler, the collector and emitter and power of the IGBT by resistance R1
The both ends busbar support resistance C2 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 of the low pressure energy-storage module terminates outer low pressure DC power supply, and the low pressure energy-storage module connects isolation optocoupler
The pin 1 of U2 provides uninterrupted turn-on power for isolation optocoupler primary side.
The present invention is further improved, and the low-pressure control module includes two-stage NPN switching tubes Q5/Q2, wherein two-stage
NPN switching tubes Q5/Q2 input termination electric discharge Enable Pins, the pin 2 of output termination isolation optocoupler U2.
Compared with prior art, the beneficial effects of the invention are as follows：Circuit is safer, by high-voltage electricity to driver and behaviour
Make the threat of personnel to eliminating；More quickly, reliably, the time can obtain control to a certain extent, can have for electric discharge
Low-voltage power supply or without low-voltage power supply in the case of quickly high-voltage electricity is discharged into 60V or less safe rangies, while can expire again
Electrion safe class ASIL A in sufficient ISO26262 functional safeties；The heat of power consumption and generation caused by solving continuous discharge
It measures and test is risen to the temperature of controller, relatively reduce the installation space of power resistor.
Description of the drawings
Fig. 1 is circuit structure block diagram of the present invention；
Fig. 2 is circuit diagram of the present invention.
Specific implementation mode
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 terminal be 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 busbar Support Capacitor, wherein described control unit
In parallel with busbar Support Capacitor after connecting with discharge cell, after the control power supply receives discharge signal, control discharge cell will
The electricity stored in busbar Support Capacitor is released to safe voltage or less.
This example prevents discharge cell from holding by increasing control module to discharge cell to keep discharge circuit relatively reliable
Power consumption caused by continuous electric discharge and the heat of generation rise test to the temperature of controller, relatively reduce the installation space of discharge cell.
More quickly, reliably, the time can obtain control to a certain extent, can meet the high pressure in ISO26262 functional safeties for electric discharge
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, secondary side and the switch of the isolation optocoupler U2
Discharge module is controlled to be 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, be increased
Add the safety of entire circuit.
The Switch Control Discharge module further includes partial pressure unit, voltage regulation unit, wherein partial pressure unit one end difference
With anode and parallel connection discharge cell and busbar Support Capacitor one end be connected, the partial pressure unit other end respectively with voltage stabilizing
Unit one end, the power pins of isolation optocoupler U2 are connected, and the other end of the voltage regulation unit connects battery cathode and parallel connection respectively
Discharge cell and the busbar Support Capacitor other end.
This example voltage regulation unit is in parallel capacitance C1 and zener diode D2, wherein the zener diode cathode connects point
Unit, anode is pressed to connect battery cathode.Partial pressure unit is multiple concatenated resistance R3, 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 500V or more.Wherein, the gate pole of the IGBT connects the secondary side of isolation optocoupler by resistance R1, the IGBT's
Collector and emitter is attempted by the both ends busbar support resistance C2 after connecting with power resistor R23.IGBT(Insulated Gate
Bipolar Transistor), insulated gate bipolar transistor is by BJT (double pole triode) and (the insulated-gate type fields MOS
Effect pipe) composition compound full-control type voltage driven type power semiconductor, have the high input impedance and GTR of MOSFET concurrently
Advantage of both low conduction voltage drop.Certainly, if the voltage of controller in 300V hereinafter, described control unit can also be selected
Other switch controlleds.
The high-voltage electricity of battery management system (BMS) can be divided by resistance R3 (or multiple resistance are connected), wherein
Resistance R3 selects larger valued resistor, makes the driving of discharge control switch pipe good using the voltage stabilizing of zener diode D2
Stablize in certain value, to open within the scope of required voltage voltage stabilization in Q1, makes entire 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 of energy module terminates outer low pressure DC power supply, and the low pressure energy-storage module connects the pin 1 of isolation optocoupler U2, for light is isolated
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 cathode.
The purpose of setting of this example polar capacitor C5 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, so that the isolation optocoupler U2 short time is connected, 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, to ensure this
The on high-tension side discharge cell of example discharges in 4S.Setting is that this example meets one of emphasis of functional safety herein, to make this
Example electric discharge more quickly, it is reliable, 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-voltage electricity is discharged into 60V or less safe rangies.
This example low-pressure control module includes two-stage NPN switching tubes Q5/Q2, wherein two-stage NPN switching tube Q5/Q2 input terminals
Connect electric discharge Enable Pin, the pin 2 of output termination isolation optocoupler U2, the emitter ground connection of Q5 and Q2.It is logical that the electric discharge of this example is enabled
It crosses CPU to send out, controller can also be directly set, electric discharge instruction is sent out, to control entire 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
By the processing of two-stage triode Q5 and Q2 progress logical transition, (triode operation is in switch shape after signal arrival low-pressure control module
State), wherein meeting under the booster action of the low pressure energy-storage module of the power outage security electric discharge of functional safety, it is former to provide isolation optocoupler U2
Side power supply so that isolation optocoupler U2, which can continue that signal will be controlled, is transmitted to subsequent IGBT Q1 and power resistor R23, herein
IGBT is that switch controlled power resistor R23 discharges, a large amount of charges for storing high pressure lateral capacitance in this way after power-off
It carries out quick, safe and reliable being released to safe voltage 60V hereinafter, well below the most short standard 3S of country in time control
It is long.
Work-based logic：When low tension works, the storage capacitor C5 for controlling side is 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, to for
Required voltage is opened in IGBT offers, when the storage capacitor energy of low-pressure side is not enough to maintain isolation optocoupler U2 work, high pressure
Side stops electric discharge.
High-pressure side BMS power-off after, low pressure do not power off in the case of, discharge control signal (low level) is opened through two-stage NPN
After closing pipe Q5/Q2, (Q5 ends, Q2 conductings) arrives 2 feet of isolation optocoupler U2, and low-tension supply LVDC15V passes through one-way conduction two
Pole pipe D1 powers to 1 foot to isolation optocoupler U2, at this point, 2 foot low levels, are connected principle according to isolation optocoupler U2, light is isolated at this time
Coupling U2 conductings, at the same time controlling switch Q1 will be connected so that power resistor R23 starts to being stored in busbar Support Capacitor C2
Charge release being discharged into safety value 60V or less.
The power supply mode difference of the secondary side (high-pressure side) of this example isolation optocoupler U2 has 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, safe, while improving the safety 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, may cause to get an electric shock to the life of the operating personnel such as after-sales service, test threatens to eliminating；It can meet again simultaneously
Electrion safe class ASIL A in ISO26262 functional safeties；The heat of power consumption and generation caused by solving continuous discharge
It measures and test is risen to the temperature of controller, relatively reduce the installation space of power resistor.
The specific implementation mode of the 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 equivalence changes made by the present invention
Within the scope of the present invention.
Claims (8)
1. a kind of electric machine controller charge/discharge control circuit meeting functional safety, it is characterised in that：Including low pressure energy-storage module, low
Press 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 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 busbar Support Capacitor, wherein described control unit is in parallel with busbar Support Capacitor after connecting with discharge cell, the control electricity
After source receives discharge signal, the electricity stored in busbar Support Capacitor is released to safe voltage or less 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 side 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 further includes partial pressure unit, voltage regulation unit, wherein described partial pressure unit one end respectively with anode and
Discharge cell and busbar 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 meets discharge cell and the mother of battery cathode and parallel connection 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 the capacitance C1 and zener diode D2 of parallel connection, wherein the zener diode cathode connects partial pressure unit, and anode connects
Battery cathode.
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 multiple concatenated resistance.
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 side of isolation optocoupler, the collector and emitter of the IGBT are attempted by busbar support resistance after connecting with power resistor R23
The both ends C2.
7. meeting the electric machine controller charge/discharge control circuit of functional safety, feature according to claim 2-6 any one of them
It is：The low pressure energy-storage module includes connected low-voltage power supply isolated location and energy-storage units, wherein the low pressure energy storage mould
The input of block terminates outer low pressure DC power supply, and the low pressure energy-storage module connects the pin 1 of isolation optocoupler U2, is that isolation optocoupler is former
Side provides 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 tubes Q5/Q2, wherein two-stage NPN switching tubes Q5/Q2 input termination electric discharge Enable Pins,
The pin 2 of output termination isolation optocoupler U2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721380419.XU CN207612217U (en) | 2017-10-24 | 2017-10-24 | A kind of electric machine controller charge/discharge control circuit meeting functional safety |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721380419.XU CN207612217U (en) | 2017-10-24 | 2017-10-24 | A kind of electric machine controller charge/discharge control circuit meeting functional safety |
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| Publication Number | Publication Date |
|---|---|
| CN207612217U true CN207612217U (en) | 2018-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721380419.XU Active CN207612217U (en) | 2017-10-24 | 2017-10-24 | A kind of electric machine controller charge/discharge control circuit meeting functional safety |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107623478A (en) * | 2017-10-24 | 2018-01-23 | 深圳市大地和电气股份有限公司 | A kind of electric machine controller charge/discharge control circuit for meeting functional safety |
| CN111262268A (en) * | 2018-11-30 | 2020-06-09 | 比亚迪股份有限公司 | Electric automobile and discharge device and method thereof |
-
2017
- 2017-10-24 CN CN201721380419.XU patent/CN207612217U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107623478A (en) * | 2017-10-24 | 2018-01-23 | 深圳市大地和电气股份有限公司 | A kind of electric machine controller charge/discharge control circuit for meeting functional safety |
| CN111262268A (en) * | 2018-11-30 | 2020-06-09 | 比亚迪股份有限公司 | Electric automobile and discharge device and method thereof |
| CN111262268B (en) * | 2018-11-30 | 2021-09-21 | 比亚迪股份有限公司 | Electric automobile and discharge device and method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191227 Address after: 563000 Guizhou new energy automobile industrial park, Nanguan sub district office, southern New District, Zunyi City, Guizhou Province Patentee after: ZUNYI DADIHE ELECTRIC CO., LTD. Address before: 518000 building 7, building J, Dongjiang science and Technology Park, Tong family community, Gongming office, Guangming District, Shenzhen, Guangdong Patentee before: SHENZHEN GREATLAND ELECTRICS INC. |
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| TR01 | Transfer of patent right |