CN202080273U - Energy management system of battery electric vehicle - Google Patents
Energy management system of battery electric vehicle Download PDFInfo
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- CN202080273U CN202080273U CN2011200888503U CN201120088850U CN202080273U CN 202080273 U CN202080273 U CN 202080273U CN 2011200888503 U CN2011200888503 U CN 2011200888503U CN 201120088850 U CN201120088850 U CN 201120088850U CN 202080273 U CN202080273 U CN 202080273U
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Abstract
The utility model discloses an energy management system of a battery electric vehicle. The energy management system comprises an Electronically Controlled Unit (ECU), a traction battery management system, a traction battery pack, a traction motor controller and a traction motor; the ECU is connected to the traction battery pack by the traction battery management system; the ECU is connected to the traction motor by the traction motor controller. The energy management system further comprises a vehicle-mounted charger; the ECU is connected with the vehicle-mounted charger; the vehicle-mounted charger is connected with the traction battery pack. According to the utility model, under a precondition that demands on basic technical characteristics (such as, dynamic property, driving stability, and the like) of the vehicle are met, the energy management system aims to realize flow of energy along the best route among the energy converting devices and to realize the highest energy utilization efficiency of the overall vehicle based on the characteristics of all parts and operation condition of the vehicle.
Description
Technical field
The utility model belongs to the pure electric automobile field, and specifically, the utility model relates to a kind of energy management system of pure electric automobile.
Background technology
At present, the basic structure of the energy supply system of electronlmobil mainly contains two kinds: a kind of is mixed power electric car (being the PLUG-IN electronlmobil), the energy source of this vehicle has three, i.e. the chemical power of the fuel that is provided by hot machine, closed-center system energy stored (can from electric network source, on-board engine/generator system or energy-recuperation system) and the automobile kinetic energy that reclaims.Another kind is the pure electric automobile with energy-recuperation system, and the energy source of this vehicle has two, and one is the power supply of electrical network, the kinetic energy when another is braking automobile, deceleration or descending.Compare with the mixed power electric car structure, pure electric automobile have non-pollutant discharge, simple in structure, efficient is high, low cost and other advantages.What the utility model was related is pure electric automobile, and its closed-center system is a storage battery.Because the entrained energy of storage battery is limited, also be very valuable, in order to realize utilizing to greatest extent energy, increase the continual mileage of automobile, just need effectively monitor and control the work of each energy conversion device, energy is reasonably distributed, to realize the optimal flow of pure electric automobile energy in energy system.
Summary of the invention
The purpose of this utility model provides a kind of energy management system of pure electric automobile, specifically be reasonably to distribute, coordinate and control by work capacity to each energy conversion device of pure electric automobile, it is mobile to realize that energy is pressed best route between each energy conversion device, makes the energy utilization efficiency of car load reach the highest.
For achieving the above object, the utility model adopts following technical scheme:
A kind of energy management system of pure electric automobile comprises energy management system ECU, traction battery management system, traction battery group, traction motor controller, traction electric machine; It is characterized in that:
Described energy management system ECU is connected to the traction battery group by the traction battery management system;
Described energy management system ECU is connected to described traction electric machine by described traction motor controller.
Described energy management system also further comprises the vehicle-mounted charge machine, and described energy management system ECU connects described vehicle-mounted charge machine, and described vehicle-mounted charge machine connects described traction battery group.
Described energy management system ECU also links to each other with the DC/DC circuit;
Described traction battery group links to each other in turn with DC/DC circuit, low tension battery, brake system;
Described DC/DC circuit, low tension battery are connected respectively to the low-voltage electrical apparatus system.
The input end of described energy management system ECU also receives travel condition of vehicle parameter and trailer reversing state parameter.
Described energy management system ECU is the key control unit of whole energy management system, it carries out reasoning and calculating to the state parameter that detects by predetermined algorithm, and send suitable control command to traction battery system, traction electric machine system etc., realize energy optimization management and control.
Described traction battery group is the main closed-center system of pure electric automobile, and its effect is to provide energy for the car load operation.The traction battery management system is the management and the control unit of traction battery group, and its main task is to keep the traction battery group functional, and optimizes the electrical property of battery pack, and sends the state parameter of battery pack to energy management system ECU.
The main effect of described traction electric machine is to provide power for the car load operation.Traction motor controller is the control and the administrative unit of traction electric machine; its main task is that the instruction control traction electric machine according to energy management system ECU is operated in motoring condition or generating state; and be protections such as traction electric machine provides overvoltage, overcurrent, excess temperature, overruns, overload, and send the running state parameter of traction electric machine system to energy management system ECU.
The main effect of described vehicle-mounted charge machine system is to be the charging of traction battery group, and guarantee charging current in desired scope, prevent battery pack overcharge, and when battery pack is full of electricity after, stop automatically charging.
The effect of described DC-DC is that the high-tension current with the traction battery group is converted to low tension, provides required electric energy to vehicle-mounted low pressure electrical appliance, and is the low tension battery charging.The effect of low tension battery is when DC-DC does not start work, is vehicle-mounted low pressure electrical appliance power supply, and when DC-DC was not enough to provide the required power of vehicle-mounted low pressure using electricity system, the auxiliary DC-DC of low tension battery powered.
Described low-voltage electrical apparatus system comprises each control unit, car light, compact electric apparatus etc., all is to provide power supply by low-voltage power supply system (being DC-DC and low tension battery).
Described brake system is directly actuated by energy management system ECU, and its working power is to be provided by low-voltage power supply system (being DC-DC and low tension battery).
Described air conditioner also is directly actuated by energy management system ECU, and its working power is to be provided by the traction battery group.
The utility model can improve the utilization ratio of car load energy; When car acceleration or climbing, can improve the tractive performance of vehicle simultaneously; Can prevent that also automobile low tension battery electric weight is low excessively, cause vehicle normally to start.
Description of drawings
Below, describe enforcement of the present invention in conjunction with the accompanying drawings in detail, wherein:
Fig. 1 is the structural representation of pure electric automobile energy management system;
Fig. 2 is a traction battery system architecture scheme drawing;
Fig. 3 is a traction electric machine system architecture scheme drawing;
Fig. 4 is a vehicle-mounted charge machine system architecture scheme drawing;
Fig. 5 is the low-voltage power supply system structural representation;
Fig. 6 is a DC/DC voltage transformation module structural representation.
The specific embodiment
The hardware of pure electric automobile energy management system of the present utility model is mainly by control unit, composition such as power element and a series of sensor, control unit refers to energy management system ECU, power element comprises traction battery group and management system thereof, traction electric machine and controller thereof, vehicle-mounted charge machine system, DC-DC and low tension battery, the low-voltage electrical apparatus system, brake system, air conditioner homenergic transfer device, sensor generally all is integrated in each energy conversion device, comprises voltage sensor, current sensor, temperature sensor, position transduser, speed sensor etc.The software of pure electric automobile energy management system mainly is that the detection signal to the feedback signal of energy conversion device and sensor carries out analyzing and processing, work capacity to each energy conversion device is optimized analysis, and send instruction to power element, energy is reasonably distributed between energy conversion device.
As shown in Figure 1, the pure electric automobile energy management system that the utility model provides comprises: energy management system ECU 1, traction battery group 2, traction battery management system 3, traction electric machine 4, traction motor controller 5, vehicle-mounted charge machine 6, DC-DC 7, low tension battery 8, low-voltage electrical apparatus system 9, brake system 10 and air conditioner 11, the pure electric automobile energy management system is according to the feedback signal of each power element and the detection signal of sensor, according to predetermined algorithm, work capacity to each energy conversion device is optimized analysis, and send instruction to power element, by the co-ordination of each power element, it is mobile to realize that energy is pressed best route between energy conversion device, make the energy utilization efficiency of car load reach the highest.
Below in conjunction with accompanying drawing, structure, effect and the principle of work of each power element in the energy management system is described in further detail.
As shown in Figure 1, energy management system ECU is the key control unit of energy management system, the control algorithm of energy management system and control policy write among the energy management system ECU, ECU is according to the signal of the state parameter that detects and each energy conversion device feedback, carry out reasoning and calculating by predetermined algorithm, and send rational control command, thereby realize the normal operation of energy management system to each energy conversion device.
As shown in Figure 2; the traction battery system is being collectively referred to as of traction battery group and management system thereof; the main task of traction battery system is that the operation for Full Vehicle System provides stable, failure-free energy; wherein the effect of traction battery management system is to keep the traction battery group functional; and optimize the electrical property of each battery and provide various protections for the traction battery group; specifically, can reduce following four aspects.
1, prevents battery pack overcharge.Between charge period, the traction battery management system needs parameters such as the voltage, temperature of each battery of continuous gauging battery pack, and parameters such as the voltage of the charge condition that obtains according to detection, battery, temperature, adjusts charge parameter, control the battery charger system, and make the state consistency of all batteries as far as possible.When process of charging finishes, in time stop charging, prevent any battery overcharge.
2, prevent the battery pack overdischarge.At interdischarge interval, the traction battery management system needs the discharge regime of monitoring battery, and the discharge process of control battery pack, before each battery deep discharge, stops discharge process, avoids the overdischarge of battery, makes electric energy reach optimal utilization.Simultaneously, in discharge process, the traction battery management system need keep the voltage of battery pack in normal scope.
3, temperature control and balance.The charging capacity of battery pack is responsive especially to temperature, therefore, battery management system need guarantee that each battery of battery pack has identical operating temperature, simultaneously, battery management system needs to measure in real time the temperature of each battery, and controls the temperature of each battery by heating and refrigeration modes.
4, the test of battery status.In order to keep the function admirable of traction battery group, battery management system needs monitoring battery status in real time.According to the residual capacity of prediction battery pack such as time of cell pressure, battery temperature, use, and according to the state parameter of battery, realize diagnosis, the failure analysis of battery, the performance perameter with battery pack offers energy management system ECU simultaneously.
As shown in Figure 3, the traction electric machine system is being collectively referred to as of traction electric machine and controller thereof, and the main task of traction electric machine system is for the car load operation provides required power, and the feedback that realizes braking energy.Wherein the effect of traction motor controller is to keep traction electric machine stable performance, working properly, and provides various protections for traction electric machine.When pure electric automobile acceleration, climbing or smooth running, traction motor controller is according to the instruction of energy management system ECU, and control inverter is operated in inverter mode, and then the control traction electric machine is operated in motoring condition; When pure electric automobile brake, descending or when running slowly, traction motor controller is according to the instruction of energy management system ECU, and control inverter is operated in the rectification pattern, and then the control traction electric machine is operated in generating state.Inverter generally all adopts the IGBT module; signals such as the voltage that traction motor controller obtains by sensor, electric current, temperature, rotating speed; realization is to the electric current of traction electric machine, the two feedback closed loops controls of rotating speed, and is protections such as traction electric machine provides overvoltage, overcurrent, excess temperature, overruns, overload.
As shown in Figure 4, vehicle-mounted charge machine system is being collectively referred to as of electrical network interface and vehicle-mounted charge machine, and the main task of vehicle-mounted charge machine system is to be the charging of traction battery group.Wherein the effect of vehicle-mounted charge machine is that the AC voltage conversion that electrical network is imported is to satisfy the vdc that batteries charging requires, and is the charging of traction battery group, and charging modes adopts constant current charge.The detailed process of vehicle-mounted charge machine voltage of transformation is that the alternating-current voltage/AC voltage that electrical network is imported is become vdc by rectification, filtering, becomes the vdc that satisfies the batteries charging requirement by the DC/DC voltage transformation module again.In addition, the process of charging of vehicle-mounted charge machine is controlled by the traction battery management system, battery management system is according to the various parameters of charge condition and battery, the charge parameter of control vehicle-mounted charge machine, make charging current in desired scope, and control vehicle-mounted charge machine stop charging after battery pack is full of electricity.
As shown in Figure 5, low-voltage power supply system is being collectively referred to as of DC-DC, low tension battery and battery management unit, the main task of low-voltage power supply system is to be vehicle-mounted low pressure electrical appliance power supply, wherein the effect of DC-DC is that the voltage transformation with the traction battery group is to satisfy the voltage that vehicle-mounted low-voltage electrical appliance requires, and to vehicle-mounted low-voltage electrical appliance power supply, and be the low tension battery charging.The voltage transformation process of DC/DC is controlled by the DC-DC control unit.The effect of low tension battery is when DC-DC does not start work, is vehicle-mounted low-voltage electrical appliance power supply, and when DC-DC was not enough to provide the required power of vehicle-mounted low pressure using electricity system, the auxiliary DC-DC of low tension battery powered.The effect of battery management unit is the electric weight abundance that keeps low tension battery, and its parameter such as voltage, electric current and temperature by the monitoring low tension battery is predicted the residual capacity of low tension battery.When the electric weight of low tension battery was not enough, the battery management unit was coordinated DC-DC work to energy management system ECU feedback information by energy management system ECU, charges to low tension battery.So just guaranteed that it is the low-voltage electrical appliance power supply that low tension battery has enough electric weight under situations such as car load startup, DC-DC do not work.
As shown in Figure 6, the DC/DC voltage transformation module is vehicle-mounted charge machine and the important component part of DC-DC, the effect of DC/DC voltage transformation module is that the vdc that will import becomes desired output dc voltage, its conversion process is that the vdc that will import becomes alternating-current voltage/AC voltage by inverter circuit, through voltage transformer boost or step-down after, by after rectification and the Filtering Processing output desired vdc.
Because the mode of operation of pure electric automobile has following several:
1. when acceleration, climbing or smooth running, the traction battery group drives traction electric machine work;
2. brake, descending or when running slowly, traction electric machine becomes the electrical generator feedback energy;
3. charge to the traction battery group by electrical network.
Below be pure electric automobile under these several mode of operations, the concrete exemplifying embodiment of energy management system provided by the utility model.
Embodiment one:
When the pure electric automobile climbing, when quickening operation, because the discharge current that the traction battery group can provide is limited, if the traction battery group can not satisfy car load operation desired power, can reduce the load of traction battery group by the electrical equipment of turning off increase travelling comforts such as air conditioner, to satisfy car load dynamic property demand.In the case, if the traction battery group can't satisfy car load operation desired power, can further reduce the load of traction battery group by DC-DC is temporarily quit work, to satisfy the temporary transient dynamic property demand of car load.At this moment, vehicle-mounted low-voltage electrical appliance is all powered by low tension battery, because the effect of battery management unit, low tension battery stores sufficient electric weight.When low tension battery is not enough to provide the required power of vehicle-mounted low pressure using electricity system, the work that should in time recover DC-DC.
Embodiment two:
When pure electric automobile brake, descending or when running slowly, traction motor controller control traction electric machine is operated in generating state, realizes the feedback of braking energy.Because reclaiming moment, the braking energy of pure electric automobile can not provide enough braking decelerations, so in pure electric automobile, braking energy reclaims and hydraulic brake system is common the existence.But, have only when the braking energy recovery has reached maximum braking potential but also can not satisfy brake request, hydraulic brake system is just started working.In the braking energy feedback process,, can continue to realize that to the low tension battery charging braking energy reclaims to greatest extent by DC-DC if the traction battery group is filled.
Embodiment three:
When electrical network charges to the traction battery group, can make DC-DC work, be the low tension battery charging simultaneously, when finishing to be implemented in process of charging, it is maximum that the pure electric automobile energy stored reaches.
Claims (3)
1. the energy management system of a pure electric automobile comprises energy management system ECU, traction battery management system, traction battery group, traction motor controller, traction electric machine; It is characterized in that:
Described energy management system ECU is connected to the traction battery group by the traction battery management system;
Described energy management system ECU is connected to described traction electric machine by described traction motor controller.
2. the energy management system of pure electric automobile according to claim 1 is characterized in that:
Described energy management system also further comprises the vehicle-mounted charge machine, and described energy management system ECU connects described vehicle-mounted charge machine, and described vehicle-mounted charge machine connects described traction battery group.
3. the energy management system of pure electric automobile according to claim 1 and 2 is characterized in that:
Described energy management system ECU also links to each other with the DC/DC circuit;
Described traction battery group links to each other in turn with DC/DC circuit, low tension battery, brake system;
Described DC/DC circuit, low tension battery are connected respectively to the low-voltage electrical apparatus system.
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| CN2011200888503U CN202080273U (en) | 2011-03-30 | 2011-03-30 | Energy management system of battery electric vehicle |
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| CN2011200888503U CN202080273U (en) | 2011-03-30 | 2011-03-30 | Energy management system of battery electric vehicle |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102723766A (en) * | 2012-06-04 | 2012-10-10 | 重庆小康工业集团股份有限公司 | Power storage range extender of electric vehicle |
| CN102923013A (en) * | 2012-11-01 | 2013-02-13 | 重庆长安汽车股份有限公司 | Discharge control method and system for new energy automobile |
| CN103674563A (en) * | 2012-08-31 | 2014-03-26 | 重庆长安汽车股份有限公司 | Integration testing method for analyzing energy flow of finished automobile |
| CN104228819A (en) * | 2014-09-30 | 2014-12-24 | 重庆长安汽车股份有限公司 | System and method for controlling DCDC of automotive 48V system |
| CN104290747A (en) * | 2014-03-17 | 2015-01-21 | 郑州宇通客车股份有限公司 | Composite power energy distributing method of hybrid vehicle |
| CN106891727A (en) * | 2015-12-18 | 2017-06-27 | 北汽福田汽车股份有限公司 | The electricity getting system of electric automobile, method and electric automobile |
| ES2640749A1 (en) * | 2016-05-02 | 2017-11-06 | Torrot Electric Europa, S.L. | System of management, diagnosis and interconnection of various batteries of propulsion of an electric vehicle (Machine-translation by Google Translate, not legally binding) |
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2011
- 2011-03-30 CN CN2011200888503U patent/CN202080273U/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723766A (en) * | 2012-06-04 | 2012-10-10 | 重庆小康工业集团股份有限公司 | Power storage range extender of electric vehicle |
| CN103674563A (en) * | 2012-08-31 | 2014-03-26 | 重庆长安汽车股份有限公司 | Integration testing method for analyzing energy flow of finished automobile |
| CN103674563B (en) * | 2012-08-31 | 2015-12-02 | 重庆长安汽车股份有限公司 | A kind of integration test method for car load Energy Flow Analysis |
| CN102923013A (en) * | 2012-11-01 | 2013-02-13 | 重庆长安汽车股份有限公司 | Discharge control method and system for new energy automobile |
| CN102923013B (en) * | 2012-11-01 | 2015-07-15 | 重庆长安汽车股份有限公司 | Discharge control method and system for new energy automobile |
| CN104290747B (en) * | 2014-03-17 | 2017-02-15 | 郑州宇通客车股份有限公司 | Composite power energy distributing method of hybrid vehicle |
| CN104290747A (en) * | 2014-03-17 | 2015-01-21 | 郑州宇通客车股份有限公司 | Composite power energy distributing method of hybrid vehicle |
| CN104228819A (en) * | 2014-09-30 | 2014-12-24 | 重庆长安汽车股份有限公司 | System and method for controlling DCDC of automotive 48V system |
| CN104228819B (en) * | 2014-09-30 | 2016-08-24 | 重庆长安汽车股份有限公司 | The DCDC control system of a kind of automobile 48V system and method |
| CN106891727A (en) * | 2015-12-18 | 2017-06-27 | 北汽福田汽车股份有限公司 | The electricity getting system of electric automobile, method and electric automobile |
| CN106891727B (en) * | 2015-12-18 | 2019-11-22 | 北京宝沃汽车有限公司 | Electricity getting system, method and the electric car of electric car |
| ES2640749A1 (en) * | 2016-05-02 | 2017-11-06 | Torrot Electric Europa, S.L. | System of management, diagnosis and interconnection of various batteries of propulsion of an electric vehicle (Machine-translation by Google Translate, not legally binding) |
| WO2017191339A1 (en) * | 2016-05-02 | 2017-11-09 | Torrot Electric Europa, S.L. | System for managing, identifying and interconnecting a plurality of propulsion batteries of an electric vehicle |
| WO2022257939A1 (en) * | 2021-06-07 | 2022-12-15 | 徐州徐工矿业机械有限公司 | Hybrid power system for mining dump truck |
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| C14 | Grant of patent or utility model | ||
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Assignee: Chongqing Changan New Energy Automotive Technology Co., Ltd. Assignor: Chongqing Changan Automobile Co., Ltd.|Chongqing Chang'an New Energy Automobile Co., Ltd. Contract record no.: 2018500000018 Denomination of utility model: Energy management system of battery electric vehicle Granted publication date: 20111221 License type: Exclusive License Record date: 20181121 |
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Effective date of registration: 20190103 Address after: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee after: Chongqing Changan New Energy Automotive Technology Co., Ltd. Address before: 400023, No. 260, Jianxin East Road, Jiangbei District, Chongqing Co-patentee before: Chongqing Chang'an New Energy Automobile Co., Ltd. Patentee before: Chongqing Changan Automobile Co., Ltd. |
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Granted publication date: 20111221 |
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| CX01 | Expiry of patent term |