CN203198887U - High-voltage control circuit for electric car - Google Patents
High-voltage control circuit for electric car Download PDFInfo
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- CN203198887U CN203198887U CN 201320169331 CN201320169331U CN203198887U CN 203198887 U CN203198887 U CN 203198887U CN 201320169331 CN201320169331 CN 201320169331 CN 201320169331 U CN201320169331 U CN 201320169331U CN 203198887 U CN203198887 U CN 203198887U
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Abstract
The utility model discloses a high-voltage control circuit for an electric car. The high-voltage control circuit is characterized by comprising a quickly switched isolated type low leakage current electronic switch, a switch control module and a voltage collecting circuit, wherein the voltage collecting circuit comprises a voltage collecting control module and a voltage signal collecting resistor; the quickly switched isolated type low leakage current electronic switch is in digital communication connection with I/O (Input/Output) of the switch control module; the voltage signal collecting resistor R5 is in parallel connection with the quickly switched isolated type low leakage current electronic switch K1; the voltage collecting control module is in A/D (Analogy/Digital) communication connection with two ends of the voltage signal collecting resistor; the switching-on/off of the quickly switched isolated type low leakage current electronic switch is under the control of a control signal sent by the switch control module; and the voltage collecting circuit can dynamically monitor the voltages at the two ends of a large-capacity busbar supporting capacitor, so as to judge an insulating condition of a busbar, assess the service life of high-voltage electric equipment and alarm the high-voltage electric equipment under fault and abnormal conditions.
Description
Technical field
The utility model belongs to technical field of automotive electronics, relates to a kind of high-voltage control circuit for electric automobile; Relate in particular to a kind of motor driver rapid discharge and observation circuit; Be specially adapted to motor in electric automobile actuator intelligence rapid discharge and monitoring management control.
Background technology
Existing electric automobile high-voltage consumer quick discharging circuit comprises main power source battery B1, main positive contactless switch S1, main negative contactless switch S2, pre-charge circuit, high pressure consumer P as shown in Figure 1; Main positive contactless switch S1 coupled in series is between main power source anode and high pressure consumer P; Main negative contactless switch S2 coupled in series is between main power source battery cathode and high pressure consumer P; High pressure consumer P is connected between the positive negative wire of high voltage dc bus; The large current of the positive level output of main power source battery is transported on the high voltage dc bus positive polar through main positive contactless switch S1, and electric current is got back to the negative level of battery through high pressure consumer, high voltage dc bus negative level line and main negative contactless switch S2.At main positive contactless switch two ends pre-charge circuit in parallel; Pre-charge circuit comprises precharge contactless switch S3, a high-performance pre-charge resistance R1; Precharge contactless switch S3 and a high-performance pre-charge resistance R1 are connected in series; High pressure consumer P inside comprises the high-capacity bus Support Capacitor C1 RC discharge loop in parallel with high-performance discharging resistance R2, after the outage of high pressure consumer, need quickly the electric weight of its storage to be released, 2 pairs of capacitor C of resistance R 1 are carried out continuous discharge, this discharge is in when working long hours state, must use large resistance and high-power resistor, but use the discharging resistance meeting guiding discharge overlong time of large resistance, personal security is caused a hidden trouble, waste simultaneously energy, worsen the heat radiation of high pressure consumer.
Known patent ZL201120048062.1, a kind of high-voltage control circuit for electric automobile; Disclose a kind of optimal design circuit to existing structure, as shown in Figure 2, contactless switch S4 and high-performance discharging resistance R2 coupled in series are in the RC discharge loop, and when capacitor C 1 needed discharge, closed contactless switch S4 connected discharge loop.Although this device conserve energy, but owing to having adopted the contactless switch of mechanical action, limited switch service life, reduced speed of response, improved cost of product, being in when operation that electric capacity is released can not monitor state, can not worsen by the early warning bus insulation, when device breaks down or system can not in time send alarm message when abnormal condition occurring.
The dynamic monitoring sparking voltage also is the technical scheme that those skilled in the art seek always in high-voltage control circuit.
Summary of the invention
The utility model discloses a kind of high-voltage control circuit for electric automobile, can not monitor to solve prior art mesohigh consumer rapid discharge, can not the early warning bus insulation worsen, when device breaks down or system can not in time send alarm message when abnormal condition occurring; Because discharge circuit is in the state of working long hours, use large resistance and high-power resistor guiding discharge overlong time, personal security is caused a hidden trouble waste energy, the problems such as high pressure consumer heat radiation deterioration.
The utility model comprises main power source battery B1, main positive contactless switch S1, main negative contactless switch S2, pre-charge circuit; High pressure consumer inside comprises the high-capacity bus Support Capacitor C1 RC discharge loop in parallel with high-performance discharging resistance R2; Main positive contactless switch S1 coupled in series is between the RC discharge loop of main power source anode and high pressure consumer; Main negative contactless switch S2 coupled in series is between the RC discharge loop of main power source battery cathode and high pressure consumer; At main positive contactless switch two ends pre-charge circuit in parallel; Pre-charge circuit comprises precharge contactless switch S3, high-performance pre-charge resistance R1; Precharge contactless switch S3 and high-performance pre-charge resistance R1 are connected in series; It is characterized in that: also comprise the isolated form low-leakage current electronic switch, switch control module, the voltage collection circuit that switch at a high speed; Voltage collection circuit comprises voltage acquisition control module, voltage signal acquisition resistance R 5; The isolated form low-leakage current electronic switch that switches at a high speed is connected with switch control module I/O digital communication; Voltage signal acquisition resistance R 5 is in parallel with the isolated form low-leakage current electronic switch K1 that switches at a high speed; The voltage acquisition control module is connected with collection resistance R 5 ends A/D digital-to-analogue communication.The closed and disconnected of high-speed isolated type low-leakage current electronic switch is controlled by the control signal that switch control module sends, the voltage collection circuit capable of dynamic is monitored high-capacity bus Support Capacitor C1 both end voltage, and then judge the insulation situation of bus and the service life of assessment high pressure consumer, and under fault and error state, can report to the police to the high pressure consumer.
The RC discharge loop that the utility model high pressure consumer inside comprises also comprises the current limliting divider resistance; Current limliting divider resistance and voltage signal acquisition resistance R 5 coupled in series, in parallel with the isolated form low-leakage current electronic switch K1 that switches at a high speed after current limliting divider resistance, 5 series connection of voltage signal acquisition resistance R.Because discharge circuit has sealed in the current limliting divider resistance, although discharge circuit is in running order all the time, working current has dropped to below 1 milliampere, and worker's consumption reduces greatly, and heat dissipation capacity descends.
Current limliting divider resistance quantity of the present utility model is 1-40, discharging resistance resistance 10 K Ω-30K Ω.
The isolated form low-leakage current electronic switch K1 switching speed that high speed of the present utility model is switched is less than or equal to 1KHz.
Good effect of the present utility model is: discharge circuit is owing to having sealed in the current limliting divider resistance, although discharge circuit is in running order all the time, but working current has dropped to below 1 milliampere, it is the decline of heat dissipation capacity that worker's consumption reduces the benefit of bringing greatly, with respect to the discharging resistance that must use large resistance in traditional discharge circuit scheme, can make the resistance of discharging resistance R2 be reduced to 10 K Ω-30K Ω in the utility model, and then the work efficiency of discharge circuit is promoted greatly, can shorten discharge time fastest in 20 seconds.Increased the isolated form low-leakage current electronic switch that can switch at a high speed and voltage collection circuit capable of dynamic monitoring electric capacity both end voltage, and then judged the service life of the insulation situation of bus and assessment motor driver and under fault and error state, can report to the police by motor driver.
Description of drawings
Fig. 1 is existing electric automobile high-voltage consumer quick discharging circuit.
Fig. 2 is known a kind of high-voltage control circuit for electric automobile.
Fig. 3 is the utility model high-voltage control circuit for electric automobile.
Among the figure: B1 main power source battery, C1 electric capacity, K1 isolated form low-leakage current electronic switch, M1 voltage acquisition control module, M2 switch control module, P high pressure consumer, R1 pre-charge resistance, R2 discharging resistance, R3 current limliting divider resistance,
R4 current limliting divider resistance, R5 voltage signal acquisition resistance, the positive contactless switch of S1 master, the negative contactless switch of S2 master, S3 precharge contactless switch.
The specific embodiment
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.
The utility model the first embodiment comprises that main power source battery B1, main positive contactless switch S1, main negative contactless switch S2, pre-charge circuit, high pressure consumer P, switching speed equal high speed switching isolated form low-leakage current electronic switch K1, current limliting divider resistance R3, current limliting divider resistance R4, switch control module M2, the voltage collection circuit of 1KHz as shown in Figure 3.Main positive contactless switch S1 coupled in series is between main power source battery B1 positive pole and high pressure consumer P; Main negative contactless switch S2 coupled in series is between main power source battery B1 negative pole and high pressure consumer P; At main positive contactless switch S1 two ends pre-charge circuit in parallel.
Pre-charge circuit comprises precharge contactless switch S3, a high-performance pre-charge resistance R1; Precharge contactless switch S3 and high-performance pre-charge resistance R1 are connected in series.
Voltage collection circuit comprises voltage signal acquisition resistance R 5, voltage acquisition control module M1; Voltage acquisition control module M1 is connected with collection resistance R 5 ends A/D digital-to-analogue communication.
High pressure consumer P is a motor driver; Motor driver inside comprises the high-capacity bus Support Capacitor C1 RC discharge loop in parallel with the high-performance discharging resistance R2 of resistance 10K Ω; And comprise switch control module M2; Current limliting divider resistance R3 and current limliting divider resistance R4 and voltage signal acquisition resistance R 5 coupled in series; It is in parallel with the isolated form low-leakage current electronic switch K1 that switches at a high speed after current limliting divider resistance R3 and current limliting divider resistance R4 connect with voltage signal acquisition resistance R 5; Because discharge circuit has sealed in the current limliting divider resistance, although discharge circuit is in running order all the time, working current has dropped to below 1 milliampere, and worker's consumption reduces greatly, and heat dissipation capacity descends.
The isolated form low-leakage current electronic switch K1 that switches at a high speed is connected by the I/O digital communication with switch control module M2; The closed and disconnected of high-speed isolated type low-leakage current electronic switch K1 is controlled by the control signal that the switch control module M2 of high pressure consumer P sends, the voltage collection circuit capable of dynamic is monitored high-capacity bus Support Capacitor C1 both end voltage, and then judge the insulation situation of bus and the service life of assessment high pressure consumer, and under fault and error state, can report to the police to high pressure consumer P.
Circuit control working process:
The main positive contactless switch S1 of vehicle high voltage power supply control, main negative contactless switch S2, precharge contactless switch S3 are also by vehicle CAN communication bus and motor driver collaborative work.After motor driver powers on, discharge switch K1 is defaulted as off-state, motor driver accesses high tension supply through behind the pre-charge process, the voltage at bus Support Capacitor C1 two ends is the voltage of dc bus, by bus Support Capacitor C1, discharging resistance R2, current limliting divider resistance R3 and R4, the voltage at bus Support Capacitor C1 two ends can be measured in the loop that voltage signal acquisition resistance R 5 forms, motor driver enters the voltage measurement pattern, can be according to discharging resistance R2 after by voltage collection circuit voltage signal acquisition resistance R 5 both end voltage being measured, the ratio of current limliting divider resistance R3 and R4 calculates the voltage at bus Support Capacitor C1 two ends.This voltage value signal offers motor driver and is used for electric machine control when vehicle works; after the voltage at bus Support Capacitor C1 two ends occurs unusually; motor driver can be learnt by in time monitoring of voltage collecting device; enter immediately the emergency protection pattern, and send failure alarm signal by the vehicle CAN communication bus.
When closing vehicle, motor driver sends the closed discharge switch K1 of control signal, this moment, circuit form became the RC discharge loop that is comprised of bus Support Capacitor C1, discharging resistance R2, discharge switch K1, because discharging resistance R2 resistance is less, the electric weight of the upper storage of bus Support Capacitor C1 can be released by discharging resistance R2 fast speed, and can be controlled in 20 seconds discharge time the soonest.In whole discharge process, motor driver enters the dynamic monitoring pattern, every t1(100 millisecond ~ 100 second) time, motor driver can be by calculating through after t1 section discharge time, the computing value Uc of bus Support Capacitor C1 both end voltage, motor driver disconnects discharge switch K1, enters the voltage measurement state, can actual measurement bus Support Capacitor C1 both end voltage obtain actual value Ut, as Ut〉during Uc+ △ U (△ U is the discrepancy adjustment amount that sets).The velocity of discharge of proof bus Support Capacitor C1 is crossed slow or not discharge, motor driver enters fault-alarming state, send fault alarm information by the vehicle CAN communication bus, when Ut＜Uc-△ U, the velocity of discharge of proof bus Support Capacitor C1 is too fast, except the discharge loop of electric discharge device, certainly also has other loop that electric capacity is discharged, the dc bus class of insulation that is connected to as can be known on the motor driver descends, and has caused partly electric leakage.Motor driver enters fault-alarming state, send dc bus class of insulation abnormal alarm information by the vehicle CAN communication bus, when Uc-△ U＜Ut＜Uc+ △ U, the velocity of discharge of proof bus Support Capacitor C1 is normal, electric discharge device is working properly, motor driver sends the closed discharge switch K1 of control signal bus Support Capacitor C1 is continued discharge, this process repeated once every the t1 time, until the actual value Ut of bus Support Capacitor C1 both end voltage reaches below the safety voltage, motor driver disconnects discharge switch K1, go forward side by side into the shutdown state, this moment is by bus Support Capacitor C1, discharging resistance R2, current limliting divider resistance R3 and R4, the loop that voltage signal acquisition resistance R 5 forms still exists, and with continuing the upper remaining electric weight of bus Support Capacitor C1 is discharged.
The utility model the second embodiment and the first embodiment do not exist together and be: the switching speed of switching at a high speed isolated form low-leakage current electronic switch equals 0.1Hz; Current limliting divider resistance quantity is 40, and each current limliting divider resistance resistance is 10 K Ω.
Claims (4)
1. a high-voltage control circuit for electric automobile comprises main power source battery, main positive contactless switch (S1), main negative contactless switch (S2), pre-charge circuit, high pressure consumer; Main positive contactless switch (S1) coupled in series is between main power source anode and high pressure consumer; Main negative contactless switch (S2) coupled in series is between main power source battery cathode and high pressure consumer; At main positive contactless switch two ends pre-charge circuit in parallel; Pre-charge circuit comprises precharge contactless switch (S3), high-performance pre-charge resistance (R1); Precharge contactless switch (S3) is connected in series with high-performance pre-charge resistance (R1); High pressure consumer inside comprises high-capacity bus Support Capacitor (C1) the RC discharge loop in parallel with high-performance resistance (R2); It is characterized in that: also comprise the isolated form low-leakage current electronic switch, switch control module, the voltage collection circuit that switch at a high speed; Voltage collection circuit comprises voltage acquisition control module, voltage signal acquisition resistance (R5); The isolated form low-leakage current electronic switch that switches at a high speed is connected with switch control module I/O digital communication; Voltage signal acquisition resistance (R5) is in parallel with the isolated form low-leakage current electronic switch (K1) that switches at a high speed; The voltage acquisition control module is connected with voltage signal acquisition resistance (R5) ends A/D digital-to-analogue communication; The closed and disconnected of high-speed isolated type low-leakage current electronic switch is controlled by the control signal that switch control module sends.
2. a kind of high-voltage control circuit for electric automobile according to claim 1, it is characterized in that: the RC discharge loop that high pressure consumer inside comprises also comprises the current limliting divider resistance; Current limliting divider resistance and voltage signal acquisition resistance (R5) coupled in series, in parallel with the isolated form low-leakage current electronic switch (K1) that switches at a high speed after current limliting divider resistance, voltage signal acquisition resistance (R5) series connection.
3. a kind of high-voltage control circuit for electric automobile according to claim 2, it is characterized in that: current limliting divider resistance quantity is 1-40, discharging resistance resistance 10 K Ω-30K Ω.
4. a kind of high-voltage control circuit for electric automobile according to claim 1 is characterized in that: isolated form low-leakage current electronic switch (K1) switching speed of switching at a high speed is less than or equal to 1KHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320169331 CN203198887U (en) | 2013-04-08 | 2013-04-08 | High-voltage control circuit for electric car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320169331 CN203198887U (en) | 2013-04-08 | 2013-04-08 | High-voltage control circuit for electric car |
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| Publication Number | Publication Date |
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| CN203198887U true CN203198887U (en) | 2013-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320169331 Withdrawn - After Issue CN203198887U (en) | 2013-04-08 | 2013-04-08 | High-voltage control circuit for electric car |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103192777A (en) * | 2013-04-08 | 2013-07-10 | 富奥汽车零部件股份有限公司 | High-voltage control circuit of electric automobile |
| CN105811388A (en) * | 2016-03-15 | 2016-07-27 | 北京新能源汽车股份有限公司 | High-voltage discharge method and circuit used for motor controller, and electric vehicle equipped with circuit |
| CN109119974A (en) * | 2018-09-27 | 2019-01-01 | 东莞市广荣电子制品有限公司 | A kind of circuit of the static leakage current of reduction for EPS power supply |
-
2013
- 2013-04-08 CN CN 201320169331 patent/CN203198887U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103192777A (en) * | 2013-04-08 | 2013-07-10 | 富奥汽车零部件股份有限公司 | High-voltage control circuit of electric automobile |
| CN103192777B (en) * | 2013-04-08 | 2015-05-13 | 富奥汽车零部件股份有限公司 | High-voltage control circuit of electric automobile |
| CN105811388A (en) * | 2016-03-15 | 2016-07-27 | 北京新能源汽车股份有限公司 | High-voltage discharge method and circuit used for motor controller, and electric vehicle equipped with circuit |
| CN109119974A (en) * | 2018-09-27 | 2019-01-01 | 东莞市广荣电子制品有限公司 | A kind of circuit of the static leakage current of reduction for EPS power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130918 Effective date of abandoning: 20150513 |
|
| RGAV | Abandon patent right to avoid regrant |