CN201523211U - Power circuit of finished electric automobile controller - Google Patents
Power circuit of finished electric automobile controller Download PDFInfo
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- CN201523211U CN201523211U CN2009201882210U CN200920188221U CN201523211U CN 201523211 U CN201523211 U CN 201523211U CN 2009201882210 U CN2009201882210 U CN 2009201882210U CN 200920188221 U CN200920188221 U CN 200920188221U CN 201523211 U CN201523211 U CN 201523211U
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- 230000005669 field effect Effects 0.000 claims description 49
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
The utility model relates to a power circuit of a finished electric automobile controller, which is connected with an anode of a storage battery, and the cathode of the storage battery is grounded; the power circuit adopts a chip LT4356. The powerful chip LT4356 is applied to a power input end of the controller, has the capacities of overcurrent protection and surge voltage limit, and provides safety assurance and firm front end protection for a crucial downstream component; the continuous working can be realized when in cold starting due to wide input voltage range of 4V to 80V, and the output is adjusted onto voltage defined by a user. In addition, the chip LT4356 also has protection capability of power input reverse connection so as to protect the load of important circuits from being damaged.
Description
Technical field
The utility model relates to vehicle electric field, especially a kind of power circuit of vehicle control unit of electric vehicle.
Background technology
At present, the electronic product of using on the automobile becomes increasingly complex, and Vehicular accumulator cell has surge and peak current, must protect Vehicle Controller to avoid these transient effect, otherwise controller may break down, and brings about great losses.Because the electronics complexity of electric automobile is higher, the problems referred to above are more outstanding on electric automobile, the reliability of entire car controller is most important to the traffic safety of automobile, and the stability of power circuit and the reliability basis of controller functional reliability often.
Power module requires to have anti-surge and peak current, power supply reverse connecting protection, power supply overvoltage protection, noise suppressed and heat radiation require ability.The defective that existing technology exists is as follows: the series connection rectifier diode power loss of (1) anti-power supply reversal connection is big; (2) prevent that the reaction speed of surge current bypass clamping diode is slow, can't stand long spike, clamping ability is low; (3) when key switch is got to the OFF position, some controller continues electricly in order to keep controller, increases lock-up relay in the controller outside, and this scheme has improved cost, has reduced the reliability of system.In addition, because electronic power components is more in the electric motor car, electromagnetic interference is a problem that is difficult to solution.
The utility model content
The purpose of this utility model is to provide a kind of power circuit that can suppress surge and peak current, have the vehicle control unit of electric vehicle of power supply reverse connecting protection and power supply overvoltage protection function.
For achieving the above object, the utility model has adopted following technical scheme: a kind of power circuit of vehicle control unit of electric vehicle, this power circuit is connected on the power input of entire car controller, power circuit links to each other with the positive pole of storage battery, the minus earth of storage battery, described power circuit adopts chip LT4356.
As shown from the above technical solution, the utility model has been used powerful chip LT4356 at the controller power source input, and this chip has overcurrent protection, the surge voltage limitation capability.Chip LT4356 provides firm front-end protection to the vital downstream components that ensures safety, and the wide input voltage range of its 4V to 80V can be realized continuous operation when cold start, and output is adjusted on the user-defined voltage.In addition, chip LT4356 also has power supply input reverse connecting protection ability, protects important circuit load to avoid damaging.
Description of drawings
Fig. 1, the 2nd, circuit diagram of the present utility model;
Fig. 3 is the internal circuit diagram of Fig. 1 chips LT4356.
Embodiment
A kind of power circuit of vehicle control unit of electric vehicle, this power circuit is connected on the power input of entire car controller, and power circuit links to each other with the positive pole of storage battery 1, the minus earth of storage battery 1, described power circuit adopts chip LT4356, as shown in Figure 1.
In conjunction with Fig. 1, described chip LT4356 comprises low resistance R0, the positive pole of the termination storage battery 1 of low resistance R0, the drain electrode of another termination P type field effect transistor Q1, the two ends of low resistance R0 also connect VCC and the SNS pin of chip LT4356 respectively, the grid of described P type field effect transistor Q1 is the end of connecting resistance R1 respectively, the positive pole of voltage stabilizing didoe D1, the other end ground connection of resistance R 1, the negative pole of voltage stabilizing didoe D1 links to each other with the source electrode of P type field effect transistor, the source electrode of P type field effect transistor Q1 connects the drain electrode of N type field effect transistor, the grid of N type field effect transistor Q2 connects the GATE pin of chip LT4356 by resistance R 2, the source electrode of N type field effect transistor Q2 links to each other with an end of resistance R 3, resistance R 3 links to each other with the FB pin of chip LT4356 and an end of resistance R 4 respectively, the other end ground connection of resistance R 4.
In conjunction with Fig. 1, the negative pole of storage battery 1 is connected with ground on the vehicle body, and entire car controller links to each other with the positive pole of storage battery 1.The electric current of storage battery 1 at first passes through the current detection circuit of entire car controller power circuit, thereby it is to measure input current indirectly by the pressure drop that detects low resistance R0, and the pressure drop of low resistance R0 is that two PIN pin-VCC pins through chip LT4356 obtain with the detection of SNS pin.Under normal situation, promptly the both positive and negative polarity at storage battery 1 does not have reversal connection, and circuit does not have under the situation that overvoltage, over-current phenomenon avoidance produce, electric current will flow through P type field effect transistor Q1, N type field effect transistor Q2.The low level signal of storage battery 1 is added to the grid of P type field effect transistor Q1, P type field effect transistor Q1 conducting by resistance R 1.Do not have overvoltage at circuit, under the situation of overcurrent, the GATE pin of chip LT4356 output high level process resistance R 2 is added in the gate terminal of N type field effect transistor Q2, N type field effect transistor Q2 conducting.The current flowing of storage battery 1 is through the field effect transistor Q2 of N type.The voltage of N type field effect transistor Q2 source terminal is collected by the FB pin of chip LT4356 by the bleeder circuit of resistance R 3 and resistance R 4.
In conjunction with Fig. 1,3, chip LT4356 has following function:
The first, over-voltage protecting function.Burning voltage is by the ratio decision of the resistance of two resistance R 3 of the FB pin that is connected to chip LT4356, R4, and in the utility model, the resistance of resistance R 3, R4 is respectively 110K and 5.6K, and burning voltage is calculated as follows: 1.25V * 115.6/5.6=25.8V.Common selection is the rated voltage that is set to be lower than slightly downstream components.Electric motor car entire car controller maximum input voltage higher limit is for allowing two battery feed input value, i.e. 27V.If when the supply voltage of input was higher than 25.8V a little, the condenser voltage of timer will rise on the slope.If export-restriction situation duration long enough, the timer pin is that the TMR pin has reached first voltage threshold 1.25V, FLT pin step-down so, circuit sends early alert downstream, show and be about to power loss, in case reach 1.35V (second failure thresholding), timer just turn-offs field effect transistor Q2.
The second, overcurrent protection function.Cross flow restriction and be made up of the resistance low resistance R0 that is 12 milliohms and the 50mV current sense amplifier of chip LT4356 inside, the electric current computing formula of restriction is as follows: 50mv/12m Q=4.1A, so current limit is 4 amperes.When overcurrent condition occurring, the active fault current limiting loop is stabilized in 50 millivolts with the voltage on the low resistance R0, starts timer simultaneously.If overload situations continues, then turn-off field effect transistor Q2, allow its cooling a period of time connect again.Chip LT4356 is Control current not only, also monitors drain-source voltage Vds, and timer is regulated by drain-source voltage Vds at interval, and pressure reduction is high more, and timer is short more at interval.So just can keep the total energy loss among the field effect transistor Q2 almost constant between age at failure, and keep field effect transistor to work in the safety operation area, current limliting is not only protected field effect transistor, also protects the upstream fuse, and circuit just can recover from overload automatically.
The 3rd, power supply input reverse protection function.Put upside down if be input to the electric power polarity of entire car controller, when not having reverse-voltage protection, can cause very big infringement the entire car controller device.The input of chip LT4356 can be born the voltage up to-30V, and it can driving N type field effect transistor, and the diode of N type field effect transistor inside can be blocked the reverse voltage loop, thereby the situation of avoiding damaging device takes place.Isolate the diode scheme with series connection in major loop and compare advantage of the present utility model: during the entire car controller operate as normal, the power loss of field effect transistor is little more a lot of than diode.
In conjunction with Fig. 1,2, the OUT pin of described chip LT4356 connects the input of LC filter circuit that can two-way filtering high-frequency interferencing signal by node A, the LC filter circuit is with reference to prior art, the output of LC filter circuit connects the drain electrode of P type field effect transistor Q5 by Node B, voltage stabilizing didoe D2 is connected across between the drain and gate of P type field effect transistor Q5, voltage stabilizing didoe D2 just, negative pole connects P type field effect transistor Q5 grid respectively, drain electrode, the source electrode of P type field effect transistor Q5 is as the output of power circuit, promptly powers to power supply such as external equipment such as entire car controller or through after the transformation by node C.One termination ignition switch of resistance R 5, the base stage of another termination triode Q3 of resistance R 5, be connected across between the base stage and emitter of triode Q3 after resistance R 6 and capacitor C 1 are in parallel, the collector electrode of the collector connecting transistor Q4 of triode Q3, the grid of one termination P type field effect transistor Q5 of resistance R 7, the other end of resistance R 7 is connected on triode Q3, between the collector electrode of Q4, triode Q3, the grounded emitter of Q4, resistance R 8, be connected across after capacitor C 2 parallel connections between the base stage and emitter of triode Q2, the end of the base stage connecting resistance R9 of triode Q2, resistance R 9 connects a pin of single-chip microcomputer, resistance R 9 output single-chip microcomputer inhibit signals, described single-chip microcomputer is the entire car controller master chip.
After the electric current process LC filter circuit filtering in conjunction with Fig. 1,2 storage batterys 1, flow into Node B, the function of circuit shown in Figure 3 is to realize controlling powering on and power down of entire car controller by control single chip computer.At first the electric current of storage battery 1 must make the grid place of P type field effect transistor Q5 get low level signal if want to circulate through P type field effect transistor Q5.When car load starts for the first time, when ignition switch is got to ignition location, high level signal is loaded into the base stage of triode Q3 through resistance R 5, thereby make triode Q3 conducting, after the triode Q3 conducting, low level signal is loaded into the grid of P type field effect transistor Q5 through resistance R 7, thereby makes P type field effect transistor Q5 conducting, electric current flows through, single-chip microcomputer with and peripheral circuit begin.Simultaneously, a pin output high level signal of single-chip microcomputer is opened triode Q4, low level signal is through triode Q4, resistance R 7 also is carried in the grid of P type field effect transistor Q5, even at this moment the driver knocks ignition switch down the position of OFF shelves, P type field effect transistor Q5 still can conducting, thereby the power down function of entire car controller can be controlled by the program of single-chip microcomputer.
In sum, core of the present utility model is to adopt chip LT4356 and peripheral circuit in the input of power supply, when having surge voltage to produce, and after the FB pin of chip LT4356 detects voltage, the field effect transistor of turn-offing forward conduction by chip LT4356; When having over-current phenomenon avoidance to take place, current sensor senses is also turn-offed field effect transistor by chip LT4356 to electric current.Under the circuit normal operating conditions, the internal resistance of field effect transistor is very little, and power loss is more much lower than rectifier diode.
Claims (4)
1. the power circuit of a vehicle control unit of electric vehicle, it is characterized in that: this power circuit is connected on the power input of entire car controller, power circuit links to each other with the positive pole of storage battery (1), the minus earth of storage battery (1), and described power circuit adopts chip LT4356.
2. the power circuit of vehicle control unit of electric vehicle according to claim 1, it is characterized in that: described chip LT4356 comprises low resistance R0, the positive pole of the termination storage battery of low resistance R0, the drain electrode of another termination P type field effect transistor Q1, the two ends of low resistance R0 also connect VCC and the SNS pin of chip LT4356 respectively, the grid of described P type field effect transistor Q1 is the end of connecting resistance R1 respectively, the positive pole of voltage stabilizing didoe D1, the other end ground connection of resistance R 1, the negative pole of voltage stabilizing didoe D1 links to each other with the source electrode of P type field effect transistor, the source electrode of P type field effect transistor Q1 connects the drain electrode of N type field effect transistor, the grid of N type field effect transistor Q2 connects the GATE pin of chip LT4356 by resistance R 2, the source electrode of N type field effect transistor Q2 links to each other with an end of resistance R 3, resistance R 3 links to each other with the FB pin of chip LT4356 and an end of resistance R 4 respectively, the other end ground connection of resistance R 4.
3. the power circuit of vehicle control unit of electric vehicle according to claim 1, it is characterized in that: the OUT pin of described chip LT4356 connects the input of LC filter circuit, the drain electrode of the output termination P type field effect transistor Q5 of LC filter circuit, voltage stabilizing didoe D2 is connected across between the drain and gate of P type field effect transistor Q5, voltage stabilizing didoe D2 just, negative pole connects P type field effect transistor Q5 grid respectively, drain electrode, the source electrode of P type field effect transistor Q5 is as the output of power circuit, one termination ignition switch of resistance R 5, the base stage of another termination triode Q3 of resistance R 5, be connected across between the base stage and emitter of triode Q3 after resistance R 6 and capacitor C 1 are in parallel, the collector electrode of the collector connecting transistor Q4 of triode Q3, the grid of one termination P type field effect transistor Q5 of resistance R 7, the other end of resistance R 7 is connected on triode Q3, between the collector electrode of Q4, triode Q3, the grounded emitter of Q4, resistance R 8, be connected across after capacitor C 2 parallel connections between the base stage and emitter of triode Q2, the end of the base stage connecting resistance R9 of triode Q2, resistance R 9 output single-chip microcomputer inhibit signals.
4. the power circuit of vehicle control unit of electric vehicle according to claim 3, it is characterized in that: described single-chip microcomputer is the entire car controller master chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201882210U CN201523211U (en) | 2009-10-13 | 2009-10-13 | Power circuit of finished electric automobile controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201882210U CN201523211U (en) | 2009-10-13 | 2009-10-13 | Power circuit of finished electric automobile controller |
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| CN201523211U true CN201523211U (en) | 2010-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009201882210U Expired - Lifetime CN201523211U (en) | 2009-10-13 | 2009-10-13 | Power circuit of finished electric automobile controller |
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| CN (1) | CN201523211U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102673421A (en) * | 2012-05-16 | 2012-09-19 | 奇瑞汽车股份有限公司 | Method for switching sleep mode and wakeup mode of electric vehicle control unit and realization circuit thereof |
| CN104062928A (en) * | 2013-03-21 | 2014-09-24 | 陈言平 | Power supply circuit of electric vehicle controller |
| CN104143906A (en) * | 2014-07-28 | 2014-11-12 | 武汉中元通信股份有限公司 | Medium-power power source module for mobile wireless communication device |
| CN104571433A (en) * | 2013-10-21 | 2015-04-29 | 北京计算机技术及应用研究所 | Vehicular computer power supply and surge voltage suppression method thereof |
| CN104638897A (en) * | 2015-03-09 | 2015-05-20 | 浪潮集团有限公司 | Device with anti-surge function and filter function |
| CN109274064A (en) * | 2018-11-13 | 2019-01-25 | 福建北峰通信科技股份有限公司 | A kind of power protecting circuit |
| CN109677338A (en) * | 2018-12-26 | 2019-04-26 | 贵州凯星液力传动机械有限公司 | A kind of delay cut-off control circuit |
| CN110072737A (en) * | 2016-12-16 | 2019-07-30 | 日立汽车系统株式会社 | On-vehicle control apparatus |
| CN110712607A (en) * | 2019-10-29 | 2020-01-21 | 一汽解放汽车有限公司 | Acceleration and angular velocity measuring system for vehicle |
| CN111095763A (en) * | 2017-09-15 | 2020-05-01 | 日立汽车系统株式会社 | Electronic control device |
-
2009
- 2009-10-13 CN CN2009201882210U patent/CN201523211U/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102673421B (en) * | 2012-05-16 | 2014-12-10 | 奇瑞汽车股份有限公司 | Method for switching sleep mode and wakeup mode of electric vehicle control unit and realization circuit thereof |
| CN102673421A (en) * | 2012-05-16 | 2012-09-19 | 奇瑞汽车股份有限公司 | Method for switching sleep mode and wakeup mode of electric vehicle control unit and realization circuit thereof |
| CN104062928A (en) * | 2013-03-21 | 2014-09-24 | 陈言平 | Power supply circuit of electric vehicle controller |
| CN104062928B (en) * | 2013-03-21 | 2015-12-02 | 陈言平 | Vehicle control unit of electric vehicle power circuit |
| CN104571433A (en) * | 2013-10-21 | 2015-04-29 | 北京计算机技术及应用研究所 | Vehicular computer power supply and surge voltage suppression method thereof |
| CN104571433B (en) * | 2013-10-21 | 2018-04-20 | 北京计算机技术及应用研究所 | A kind of vehicle computing electromechanical source and its surging voltage suppressing method |
| CN104143906A (en) * | 2014-07-28 | 2014-11-12 | 武汉中元通信股份有限公司 | Medium-power power source module for mobile wireless communication device |
| CN104638897A (en) * | 2015-03-09 | 2015-05-20 | 浪潮集团有限公司 | Device with anti-surge function and filter function |
| CN110072737A (en) * | 2016-12-16 | 2019-07-30 | 日立汽车系统株式会社 | On-vehicle control apparatus |
| CN111095763A (en) * | 2017-09-15 | 2020-05-01 | 日立汽车系统株式会社 | Electronic control device |
| CN111095763B (en) * | 2017-09-15 | 2021-06-04 | 日立安斯泰莫株式会社 | Electronic control device |
| DE112018005166B4 (en) | 2017-09-15 | 2021-10-28 | Hitachi Automotive Systems, Ltd. | Electronic control unit |
| CN109274064A (en) * | 2018-11-13 | 2019-01-25 | 福建北峰通信科技股份有限公司 | A kind of power protecting circuit |
| CN109677338A (en) * | 2018-12-26 | 2019-04-26 | 贵州凯星液力传动机械有限公司 | A kind of delay cut-off control circuit |
| CN110712607A (en) * | 2019-10-29 | 2020-01-21 | 一汽解放汽车有限公司 | Acceleration and angular velocity measuring system for vehicle |
| CN110712607B (en) * | 2019-10-29 | 2020-12-29 | 一汽解放汽车有限公司 | Acceleration and angular velocity measuring system for vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: WUHU RUICHANG ELECTRICAL SYSTEM CO., LTD. Assignor: Saic Chery Automobile Co., Ltd. Contract record no.: 2011340000177 Denomination of utility model: Power circuit of finished electric automobile controller Granted publication date: 20100707 License type: Exclusive License Record date: 20110726 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100707 |
|
| CX01 | Expiry of patent term |