CN202006766U - High-voltage control circuit for electric automobile - Google Patents

High-voltage control circuit for electric automobile Download PDF

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Publication number
CN202006766U
CN202006766U CN2011200480621U CN201120048062U CN202006766U CN 202006766 U CN202006766 U CN 202006766U CN 2011200480621 U CN2011200480621 U CN 2011200480621U CN 201120048062 U CN201120048062 U CN 201120048062U CN 202006766 U CN202006766 U CN 202006766U
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CN
China
Prior art keywords
contactless switch
discharge
switch
resistance
control circuit
Prior art date
Application number
CN2011200480621U
Other languages
Chinese (zh)
Inventor
王柯
宋俊俊
王超
Original Assignee
比亚迪股份有限公司
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Publication date
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Priority to CN2011200480621U priority Critical patent/CN202006766U/en
Application granted granted Critical
Publication of CN202006766U publication Critical patent/CN202006766U/en

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Abstract

The utility model provides a high-voltage control circuit for an electric automobile, which comprises a power battery, a positive-electrode contactor, a negative-electrode contactor, a precharge contactor, a precharge resistor, a motor driver with a precharge capacitor, and a rapid discharge circuit. The rapid discharge circuit comprises a discharge resistor and a discharge switch, wherein the discharge resistor is parallelly connected with the precharge capacitor after being serially connected with the discharge switch. When the circuit is cut off, the discharge switch is closed, the discharge resistor and the precharge capacitor form a discharge circuit so that the voltage of the precharge capacitor drops to be below safety voltage.

Description

A kind of electronlmobil high-voltage control circuit
Technical field
The utility model relates to the motor driven systems of electronlmobil, and more particularly, the utility model relates to the rapid discharge loop in the electronlmobil high-voltage control circuit.
Background technology
The motor driver of existing battery-driven car all comprises a pre-charging capacitor, needs timely high-tension current with pre-charging capacitor to bleed off after the car load outage, and its voltage is reduced to below the safety voltage.
Battery-driven car generally adopts as accompanying drawing 1 described high-voltage control circuit at present, comprise electrokinetic cell 10, anodal contactless switch KM1, negative pole contactless switch KM2, preliminary filling contactless switch KM3, preliminary filling resistance R1, the motor driver 20 that has pre-charging capacitor C, an end and electrokinetic cell 10 positive poles of anodal contactless switch KM1 join, the end of negative pole contactless switch KM2 and electrokinetic cell 10 negative poles join, the other end of anodal contactless switch KM1 and negative pole contactless switch KM2 joins with the motor driver 20 that has pre-charging capacitor C respectively, after preliminary filling resistance R1 and the preliminary filling contactless switch KM3 serial connection with anodal contactless switch KM1 and connect, at pre-charging capacitor C two ends and meet a discharging resistance R2, when battery-driven car quits work, anodal contactless switch and/or negative pole contactless switch disconnect, pre-charging capacitor C and discharging resistance R2 form a RC discharge loop, and the electric weight of pre-charging capacitor C consumes by discharging resistance R2.This discharge circuit is because power problems, need to use the resistance of big resistance, but the resistance that is to use big resistance can cause discharge time long, there is hidden danger in personal security, especially when car load bumps, if discharge circuit can not rapid discharge, voltage is dropped to rapidly below the safety voltage, will produce injury to passengers inside the car and rescue group.
One of scheme that overcomes the above problems is the resistance that reduces discharging resistance.But after reducing resistance, discharge current increases, the power boosting of resistance consumption.Because when the vehicle normal operation, this discharge circuit is worked always, and discharging resistance is consuming the electric energy of car load always, and has heating hidden danger on fire, this and require the principle of electronic overall height safety low energy consumption opposing at present.
Summary of the invention
The utility model is long discharge time at motor driver discharge circuit in the prior art, the high-power problem of resistance consumption, and it is fast to propose a kind of discharge time, the motor driver quick discharging circuit that consumed power is little.
The utility model provides a kind of electronlmobil high-voltage control circuit, comprise electrokinetic cell, anodal contactless switch, the negative pole contactless switch, the preliminary filling contactless switch, preliminary filling resistance, the motor driver that has pre-charging capacitor, one end and the power battery anode of described anodal contactless switch join, one end and the power battery cathode of described negative pole contactless switch join, the other end of described anodal contactless switch and negative pole contactless switch joins with the described motor driver that has pre-charging capacitor respectively, after described preliminary filling resistance and the preliminary filling contactless switch serial connection with described anodal contactless switch and connect, described control circuit also comprises the rapid discharge loop, described rapid discharge loop comprises discharge switch and discharging resistance, after described discharge switch is connected in series with described discharging resistance with described pre-charging capacitor and connect.
Further, described discharging resistance employing resistance is the resistance of 3K Ω-10K Ω.
Further, described discharge switch adopts normally closed contactor.
Further, described discharge switch comprises control end, and described control end is electrically connected with described motor driver.
Further, described anodal contactless switch, negative pole contactless switch, preliminary filling contactless switch are electrically connected with described motor driver respectively.
Technique scheme, by discharge switch control discharge loop, closed discharge switch when vehicle cuts off the power supply, pre-charging capacitor is discharged by discharging resistance; Disconnect discharge switch during vehicle operation, discharge loop quits work, and has saved the electric energy that car load consumes, and has shortened discharge time.
In conjunction with the drawings, read following detailed description, can further understand advantage of the present utility model, feature specific embodiment of the utility model.
Description of drawings
Accompanying drawing 1 is an electronlmobil high-voltage control circuit scheme drawing in the prior art.
Accompanying drawing 2 is the high-voltage control circuit scheme drawing of preferred embodiment of the present utility model.
The specific embodiment
Clearer for technical matters, technical scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
With reference to the accompanying drawings the specific embodiment of the present invention is elaborated, the utility model adopts high-voltage control circuit as shown in Figure 2, comprise electrokinetic cell 10, anodal contactless switch KM1, negative pole contactless switch KM2, preliminary filling contactless switch KM3, preliminary filling resistance R1, the motor driver 20 that has pre-charging capacitor C, the end of described anodal contactless switch KM1 and electrokinetic cell 10 positive poles join, the end of described negative pole contactless switch KM2 and electrokinetic cell 10 negative poles join, the other end of described anodal contactless switch KM1 and negative pole contactless switch KM2 joins with the described motor driver 20 that has pre-charging capacitor C respectively, after described preliminary filling resistance R1 and the preliminary filling contactless switch KM3 serial connection with described anodal contactless switch KM1 and connect, described rapid discharge loop comprises discharge switch KM4, after discharging resistance R2, discharge switch KM4 are connected in series with discharging resistance R2 with pre-charging capacitor C and connect.
Discharge switch KM4 preferably adopts normally closed contactor, and discharge switch KM4 was in disconnection when incoming signal was arranged; Discharge switch KM4 is in closure during the no signal input; It is the resistance of 3K Ω-10K Ω that discharging resistance R2 preferably adopts resistance; Discharge switch KM4 has control end, and described control end is electrically connected with motor driver 20, the break-make of motor driver 20 control discharge switch KM4; Anodal contactless switch KM1, negative pole contactless switch KM2, preliminary filling contactless switch KM3 are electrically connected with motor driver 20 respectively, the break-make of motor driver 20 control anodal contactless switch KM1, negative pole contactless switch KM2, preliminary filling contactless switch KM3.
When circuit powers on, motor driver 20 at first closed preliminary filling contactless switch KM3 and negative pole contactless switch KM2, electrokinetic cell 10 is pre-charging capacitor C charging, when pre-charging capacitor C both end voltage rises to when consistent with electrokinetic cell 10 motor driver 20 closed anodal contactless switch KM1, disconnect preliminary filling contactless switch KM3, the circuit normal operation, at this moment, motor driver 20 output signals, discharge switch KM4 disconnects, and discharging resistance R2 does not work.
During down circuitry, motor driver 20 disconnects anodal contactless switch KM1 and/or negative pole contactless switch KM2, and this moment, control circuit quit work, the output of motor driver 20 no signals, and normally closed contactor KM4 closure, pre-charging capacitor C is by discharging resistance R2 discharge.
Above embodiment, by discharge switch KM4 control discharge loop, discharge switch KM4 disconnects during the vehicle normal operation, and discharging resistance R2 does not work; When vehicle quits work, discharge switch KM4 closure, discharging resistance R2 work, the voltage of pre-charging capacitor C is descended rapidly, compared with prior art, above embodiment has reduced the power consumption of car load, has shortened discharge time, the voltage of high-voltage control circuit is reduced to below the safety voltage fast, improved the safety performance of car load.
The above only is the preferred embodiment of utility model, not in order to restriction the utility model, all any modifications of being done within spirit of the present utility model and principle, is equal to and replaces and improvement etc., all should be included within the protection domain of the present utility model.

Claims (5)

1. electronlmobil high-voltage control circuit, comprise electrokinetic cell, anodal contactless switch, the negative pole contactless switch, the preliminary filling contactless switch, preliminary filling resistance, the motor driver that has pre-charging capacitor, one end and the power battery anode of described anodal contactless switch join, one end and the power battery cathode of described negative pole contactless switch join, the other end of described anodal contactless switch and negative pole contactless switch joins with the described motor driver that has pre-charging capacitor respectively, after described preliminary filling resistance and the preliminary filling contactless switch serial connection with described anodal contactless switch and connect, it is characterized in that, described control circuit also comprises the rapid discharge loop, described rapid discharge loop comprises discharge switch and discharging resistance, after described discharge switch is connected in series with described discharging resistance with described pre-charging capacitor and connect.
2. electronlmobil high-voltage control circuit according to claim 1 is characterized in that, it is the resistance of 3K Ω-10K Ω that described discharging resistance adopts resistance.
3. electronlmobil high-voltage control circuit according to claim 1 is characterized in that, described discharge switch adopts normally closed contactor.
4. electronlmobil high-voltage control circuit according to claim 1 is characterized in that described discharge switch comprises control end, and described control end is electrically connected with described motor driver.
5. electronlmobil high-voltage control circuit according to claim 1 is characterized in that, described anodal contactless switch, negative pole contactless switch, preliminary filling contactless switch are electrically connected with described motor driver respectively.
CN2011200480621U 2011-02-25 2011-02-25 High-voltage control circuit for electric automobile CN202006766U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011200480621U CN202006766U (en) 2011-02-25 2011-02-25 High-voltage control circuit for electric automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011200480621U CN202006766U (en) 2011-02-25 2011-02-25 High-voltage control circuit for electric automobile

Publications (1)

Publication Number Publication Date
CN202006766U true CN202006766U (en) 2011-10-12

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CN2011200480621U CN202006766U (en) 2011-02-25 2011-02-25 High-voltage control circuit for electric automobile

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CN (1) CN202006766U (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102975628A (en) * 2012-12-20 2013-03-20 中通客车控股股份有限公司 High-voltage control system of electric automobile
CN103066583A (en) * 2012-12-13 2013-04-24 重庆长安汽车股份有限公司 Device and method of fast discharging of high-voltage direct-current bus
CN103072464A (en) * 2013-02-05 2013-05-01 安徽安凯汽车股份有限公司 High voltage system power-on and power-off control circuit of series hybrid vehicle and control method
CN103186109A (en) * 2011-12-31 2013-07-03 比亚迪股份有限公司 Control system for electric automobile and electric automobile with same
WO2013097830A1 (en) * 2011-12-31 2013-07-04 深圳市比亚迪汽车研发有限公司 High-power charging system for electric vehicle and control method therefor
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
CN103373296A (en) * 2012-04-30 2013-10-30 通用汽车环球科技运作有限责任公司 Passive high-voltage DC bus discharge circuit for a vehicle
CN103481785A (en) * 2013-09-24 2014-01-01 湖南南车时代电动汽车股份有限公司 Extended-range power system and double-voltage protection method thereof
WO2014206368A1 (en) * 2013-06-28 2014-12-31 Shenzhen Byd Auto R&D Company Limited Power system for electric vehicle, electric vehicle and method for charging power battery
CN104512269A (en) * 2013-09-27 2015-04-15 通用汽车环球科技运作有限责任公司 Distributed vehicle battery high-voltage bus systems and methods
CN104827986A (en) * 2014-04-09 2015-08-12 北汽福田汽车股份有限公司 Hybrid electric vehicle and switch protection device of high-voltage circuit thereof
CN105172608A (en) * 2015-08-03 2015-12-23 中通客车控股股份有限公司 Control circuit and method for power on and power off of electric automobile high-pressure system
CN105915041A (en) * 2016-07-04 2016-08-31 珠海格力电器股份有限公司 Charge bleed-off method, bleeder circuit and converter
CN106314169A (en) * 2016-08-04 2017-01-11 重庆长安汽车股份有限公司 High-voltage pre-charging control method and system and electric vehicle
CN107769359A (en) * 2017-11-24 2018-03-06 安徽维新能源技术有限公司 A kind of electric machine controller bus capacitor charge-discharge circuit
CN110275068A (en) * 2018-03-16 2019-09-24 广州小鹏汽车科技有限公司 A kind of capacitor capacitance detection method and equipment
CN111355271A (en) * 2018-12-21 2020-06-30 比亚迪股份有限公司 Vehicle, charging device, charging method, discharging method, and protection system

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103187762B (en) * 2011-12-31 2016-08-03 比亚迪股份有限公司 High-power charging system and control method thereof for electric automobile
CN103186109B (en) * 2011-12-31 2016-08-17 比亚迪股份有限公司 The control system of electric automobile and there is its electric automobile
CN103186109A (en) * 2011-12-31 2013-07-03 比亚迪股份有限公司 Control system for electric automobile and electric automobile with same
CN103187762A (en) * 2011-12-31 2013-07-03 比亚迪股份有限公司 High power charging system for electric car and control method thereof
WO2013097830A1 (en) * 2011-12-31 2013-07-04 深圳市比亚迪汽车研发有限公司 High-power charging system for electric vehicle and control method therefor
CN103373296A (en) * 2012-04-30 2013-10-30 通用汽车环球科技运作有限责任公司 Passive high-voltage DC bus discharge circuit for a vehicle
US9018865B2 (en) 2012-04-30 2015-04-28 GM Global Technology Operations LLC Passive high-voltage DC bus discharge circuit for a vehicle
CN103373296B (en) * 2012-04-30 2016-01-20 通用汽车环球科技运作有限责任公司 For the passive high voltage DC bus discharge of vehicle
CN103066583A (en) * 2012-12-13 2013-04-24 重庆长安汽车股份有限公司 Device and method of fast discharging of high-voltage direct-current bus
CN102975628A (en) * 2012-12-20 2013-03-20 中通客车控股股份有限公司 High-voltage control system of electric automobile
CN102975628B (en) * 2012-12-20 2015-07-08 中通客车控股股份有限公司 High-voltage control system of electric automobile
CN103072464A (en) * 2013-02-05 2013-05-01 安徽安凯汽车股份有限公司 High voltage system power-on and power-off control circuit of series hybrid vehicle and control method
CN103072464B (en) * 2013-02-05 2015-09-09 安徽安凯汽车股份有限公司 A kind of series hybrid electric vehicle high-pressure system power-on and power-off control circuit and control method
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
WO2014206368A1 (en) * 2013-06-28 2014-12-31 Shenzhen Byd Auto R&D Company Limited Power system for electric vehicle, electric vehicle and method for charging power battery
US10166882B2 (en) 2013-06-28 2019-01-01 Byd Company Limited Power system for electric vehicle
CN103481785A (en) * 2013-09-24 2014-01-01 湖南南车时代电动汽车股份有限公司 Extended-range power system and double-voltage protection method thereof
CN103481785B (en) * 2013-09-24 2016-05-11 湖南南车时代电动汽车股份有限公司 Extended-range dynamical system and two voltage protection method thereof
CN104512269A (en) * 2013-09-27 2015-04-15 通用汽车环球科技运作有限责任公司 Distributed vehicle battery high-voltage bus systems and methods
CN104827986B (en) * 2014-04-09 2017-03-15 北汽福田汽车股份有限公司 Hybrid vehicle and its switching protection of high-tension circuit
CN104827986A (en) * 2014-04-09 2015-08-12 北汽福田汽车股份有限公司 Hybrid electric vehicle and switch protection device of high-voltage circuit thereof
CN105172608B (en) * 2015-08-03 2017-09-29 中通客车控股股份有限公司 Electric control circuit and control method above and below a kind of electric automobile high-voltage system
CN105172608A (en) * 2015-08-03 2015-12-23 中通客车控股股份有限公司 Control circuit and method for power on and power off of electric automobile high-pressure system
CN105915041A (en) * 2016-07-04 2016-08-31 珠海格力电器股份有限公司 Charge bleed-off method, bleeder circuit and converter
CN106314169A (en) * 2016-08-04 2017-01-11 重庆长安汽车股份有限公司 High-voltage pre-charging control method and system and electric vehicle
CN107769359A (en) * 2017-11-24 2018-03-06 安徽维新能源技术有限公司 A kind of electric machine controller bus capacitor charge-discharge circuit
CN110275068A (en) * 2018-03-16 2019-09-24 广州小鹏汽车科技有限公司 A kind of capacitor capacitance detection method and equipment
CN111355271A (en) * 2018-12-21 2020-06-30 比亚迪股份有限公司 Vehicle, charging device, charging method, discharging method, and protection system

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Granted publication date: 20111012