CN101916888A - Intelligent charging equalization method and device of power battery for hybrid power vehicle and pure electric vehicle - Google Patents

Intelligent charging equalization method and device of power battery for hybrid power vehicle and pure electric vehicle Download PDF

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Publication number
CN101916888A
CN101916888A CN2010102531007A CN201010253100A CN101916888A CN 101916888 A CN101916888 A CN 101916888A CN 2010102531007 A CN2010102531007 A CN 2010102531007A CN 201010253100 A CN201010253100 A CN 201010253100A CN 101916888 A CN101916888 A CN 101916888A
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CN
China
Prior art keywords
cell
electrokinetic cell
power battery
power
charging
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Pending
Application number
CN2010102531007A
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Chinese (zh)
Inventor
孙江明
徐志刚
王燕兵
赵铁鹏
王刚
张铭
谢世荣
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Shanghai Zhongke Shenjiang Electric Vehicle Co Ltd
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Shanghai Zhongke Shenjiang Electric Vehicle Co Ltd
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Publication date
Application filed by Shanghai Zhongke Shenjiang Electric Vehicle Co Ltd filed Critical Shanghai Zhongke Shenjiang Electric Vehicle Co Ltd
Priority to CN2010102531007A priority Critical patent/CN101916888A/en
Publication of CN101916888A publication Critical patent/CN101916888A/en
Pending legal-status Critical Current

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention relates to intelligent charging equalization method and device of a power battery for a hybrid power vehicle and a pure electric vehicle. The method comprises the following steps of: (1) controlling a charger to charge the power battery when forecasting that the equalized charging needs to be carried out on the power battery by using a power battery management system; (2) when charging the power battery by using the charger, collecting the single voltage of each single power battery by using the power battery management system until the single voltage of at least one single battery reaches the maximum value; and (3) controlling the charger to stop charging the power battery and controlling a charging equalizer to start to carry out singly equalized charging on each single battery until the battery is fully charged by using the power battery management system. The invention also provides a relevant device. The intelligent charging equalization method has the advantages of unique conception and ingenious design and can rapidly, effectively and conveniently realize equalized charging maintenance to the power battery; and the device has concise structure and is suitable for large-scale generalization and application.

Description

Hybrid power and pure electric automobile electrokinetic cell intelligent charging equalization method and device
Technical field
The present invention relates to the automobile dynamic system technical field, particularly hybrid power and pure electric automobile are used the power battery technology field, specifically are a kind of hybrid power and pure electric automobile intelligent charging equalization methods and the devices with electrokinetic cell.
Background technology
Hybrid power and pure electric automobile have increased high voltage power battery system, motor and key components and parts such as electric machine controller, entire car controller on the basis of orthodox car.Wherein, the high voltage power battery system is made up of battery management system, heat management system and several series connected battery, the property relationship of high voltage power battery system is to the performance of car load, and consistency of the performance of high voltage power battery and battery cell, performance, heat management system etc. are relevant.
The high voltage power power brick is made up of several series connected battery, because the property of there are differences in the battery manufacture process; In the use, be subjected to the influence of environment, will increase the inconsistency of battery, thereby reduce the operating efficiency of battery, shorten the life-span of battery.
For prolonging the life-span of high-tension battery bag, increase battery efficiency, after the high voltage power power brick is used a period of time, need do the equalization charging to each single battery.
Existing battery balancedization charge maintenance generally adopts energy transfer method or energy consumption method, its basic principle is the monomer voltage that battery management system detects each battery cell, if voltage difference surpasses the scope that allows between battery cell, management system control relay or metal-oxide-semiconductor, control discharge resistance or electric capacity are connected with the battery cell that needs equalization, thereby realize energy consumption or transfer to battery cell, reach the purpose of battery cell equalization, but this battery cell equalization method cost height, need to consume certain energy, increased the difficulty of Machine Design and battery system heat management.
Therefore, expect a kind of battery balancedization method and apparatus, can effectively realize equalization charge maintenance fast easily electrokinetic cell.
Summary of the invention
The objective of the invention is to have overcome above-mentioned shortcoming of the prior art, a kind of hybrid power and pure electric automobile intelligent charging equalization methods and device with electrokinetic cell are provided, this method design is unique, design ingenious, can effectively realize equalization charge maintenance fast easily to electrokinetic cell, and apparatus structure is succinct, is suitable for large-scale promotion application.
To achieve these goals,, provide a kind of hybrid power and pure electric automobile intelligent charging equalization methods, be characterized in, comprised step with electrokinetic cell in a first aspect of the present invention:
(1) predict electrokinetic cell by power battery management system and need carry out equalization when charging, the control charger charges to described electrokinetic cell;
(2) described charger charges to described electrokinetic cell, and simultaneously described power battery management system is gathered the monomer voltage of each cell of described electrokinetic cell, reaches peak until the monomer voltage value of at least one described cell;
(3) described power-supply management system is controlled described charger and is stopped described electrokinetic cell is charged, and the control charge equalizer begins each described cell is carried out the monomer equalizing charge, until being full of.
Preferably, in step (1), described power battery management system predicts described electrokinetic cell by following steps need carry out the equalization charging: described power battery management system is gathered the described monomer voltage of described cell, judge whether the voltage difference between the described cell surpasses set point, if described voltage difference surpasses set point, then described power battery management system predicts that described electrokinetic cell need carry out the equalization charging.
Preferably, described cell is the lithium ion single battery, and described peak is 3.6 volts.
Preferably, described power battery management system is controlled described charger and described charge equalizer respectively by relay.
In a second aspect of the present invention, a kind of hybrid power and the pure electric automobile intelligent charging balancer with electrokinetic cell is provided, be characterized in, comprise power battery management system, at least one monomer battery voltage acquisition elements, charger and at least one charge equalizer, described power battery management system is connected with described monomer battery voltage acquisition elements, described charger and described charge equalizer circuit respectively.
Preferably, described hybrid power and pure electric automobile also comprise relay with the intelligent charging balancer of electrokinetic cell, and described power battery management system is connected with described charge equalizer circuit with described charger respectively by described relay.
Preferably, the number of described charge equalizer equals the number of the cell of electrokinetic cell.
Preferably, the number of described monomer battery voltage acquisition elements equals the number of the cell of electrokinetic cell.
Beneficial effect of the present invention is specific as follows:
1, the present invention charges to electrokinetic cell with charger earlier, when the monomer voltage of cell reaches peak, change into charge equalizer and charging, thereby when the startup charge equalizer carries out equalizing charge to cell, the cell that has reached peak when the monomer voltage of cell will no longer charge, and the monomer voltage of cell does not reach the cell of peak with equalizing charge, monomer voltage until this cell reaches maximum, thereby the equalization that realizes cell is safeguarded and charging, design is unique, design ingenious, can effectively realize equalization charge maintenance fast easily, be suitable for large-scale promotion application electrokinetic cell.
2, hybrid power of the present invention and pure electric automobile comprise power battery management system, at least one monomer battery voltage acquisition elements, charger and at least one charge equalizer with the intelligent charging balancer of electrokinetic cell, simple for structure, can effectively realize equalization charge maintenance fast easily, be suitable for large-scale promotion application electrokinetic cell.
Description of drawings
Fig. 1 is the structure connection diagram of a specific embodiment of the present invention.
Fig. 2 is the structure connection diagram of another specific embodiment of the present invention.
Embodiment
In order more to be expressly understood technology contents of the present invention, describe in detail especially exemplified by following examples, its purpose only is better to understand content of the present invention and unrestricted protection scope of the present invention.
See also shown in Fig. 1-2, hybrid power of the present invention and pure electric automobile comprise power battery management system, at least one monomer battery voltage acquisition elements (not shown), charger and at least one charge equalizer with the intelligent charging balancer of electrokinetic cell, and described power battery management system is connected with described monomer battery voltage acquisition elements, described charger and described charge equalizer circuit respectively.
Described power battery management system can be controlled described charger and described charge equalizer by any suitable element, in specific embodiments of the invention, described hybrid power and pure electric automobile also comprise relay with the intelligent charging balancer of electrokinetic cell, and described power battery management system is connected with described charge equalizer circuit with described charger respectively by described relay.
The number of described charge equalizer can be any, and preferably, the number of described charge equalizer equals the number of the cell of electrokinetic cell.See also shown in Figure 1ly, in a specific embodiment of the present invention, the number of described cell is 1, and the number of described charge equalizer is 1.See also shown in Figure 2ly, in another specific embodiment of the present invention, the number of described cell is N (N does not all illustrate greater than 5), and the number of described charge equalizer also be that N is individual, from charge equalizer 1 to charge equalizer N (all not illustrating).
The number of described monomer battery voltage acquisition elements can be any, and preferably, the number of described monomer battery voltage acquisition elements equals the number of the cell of electrokinetic cell.For example, in a specific embodiment of the present invention, the number of described cell is 1, and the number of described monomer battery voltage acquisition elements is 1.In another specific embodiment of the present invention, the number of described cell is N (N does not all illustrate greater than 5), and the number of described monomer battery voltage acquisition elements also is a N (not shown).
When the present invention uses, charger is connected to electrokinetic cell, charge equalizer and cell connect one to one, and monomer battery voltage acquisition elements and cell connect one to one.
Power battery management system has equalization charging forecast function, power battery management system is responsible for predicting whether electrokinetic cell needs to carry out the equalization charging, need carry out equalization when charging when predicting electrokinetic cell, power battery management system sends equalization charging request.
Electrokinetic cell equalization charge step is as follows:
(1) predict electrokinetic cell by power battery management system and need carry out equalization when charging, by relay, thereby the control charger charges to described electrokinetic cell;
(2) described charger charges to described electrokinetic cell, and simultaneously described power battery management system is gathered the monomer voltage of each cell of described electrokinetic cell, reaches peak until the monomer voltage value of at least one described cell;
(3) described power-supply management system is connected with the charging of electrokinetic cell by relay cut-out charger, thereby controlling described charger stops described electrokinetic cell is charged, and begin each described cell is carried out the monomer equalizing charge by relay control charge equalizer, until being full of.
Described power battery management system can predict described electrokinetic cell by following steps need carry out the equalization charging: described power battery management system is gathered the described monomer voltage of described cell, judge whether the voltage difference between the described cell surpasses set point, if described voltage difference surpasses set point, then described power battery management system predicts that described electrokinetic cell need carry out the equalization charging.
Described cell can be any suitable battery.Preferably, described cell is the lithium ion single battery, and described peak is 3.6 volts.
Adopt the present invention, with charger electrokinetic cell charged earlier, when the monomer voltage of cell is charged to maximum, with charge equalizer to power battery charging.Like this, when the startup charge equalizer carries out equalizing charge to cell, when having reached peaked cell, the monomer voltage of cell will no longer charge, and the monomer voltage of cell does not reach peaked cell with equalizing charge, monomer voltage until cell reaches maximum, thereby the equalization that realizes battery cell is safeguarded and charging.
The present invention realizes the equalization of lithium-ion-power cell is safeguarded that this charging method portfolio effect is obvious that the time is quick, and is convenient and reliable, do not need to control the charging interval of charge equalizer, reduces to overcharge risk by to the overcharging of lithium-ion-power cell.
In the present invention, each cell has a cover equalizing circuit, at least two cell series connection, the direct voltages of organizing of output simultaneously more, realized the equalizing charge of a plurality of series connection cells, make that the terminal voltage of each cell raises synchronously in the electrokinetic cell, sufficient simultaneously, avoided owing to the different phenomenons of overcharging that cause of each cell characteristic, improve the actual capacity and the useful life of electrokinetic cell, according to the target equalizing voltage of electrokinetic cell setting and the maximum voltage difference charging of balance, switch charger or charge equalizer by relay.The present invention can guarantee that the voltage difference between each cell is no more than the scope of a certain setting, improves unbalanced between the electrokinetic cell, reduces the maintenance and the replacing of cell.
To sum up, hybrid power of the present invention and pure electric automobile are unique with the intelligent charging equalization methods design of electrokinetic cell, design ingenious, can the effective fast equalization charge maintenance that realize easily electrokinetic cell, and apparatus structure is succinct, is suitable for large-scale promotion application.
In this specification, the present invention is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.

Claims (8)

1. hybrid power and pure electric automobile is characterized in that with the intelligent charging equalization methods of electrokinetic cell, comprise step:
(1) predict electrokinetic cell by power battery management system and need carry out equalization when charging, the control charger charges to described electrokinetic cell;
(2) described charger charges to described electrokinetic cell, and simultaneously described power battery management system is gathered the monomer voltage of each cell of described electrokinetic cell, reaches peak until the monomer voltage value of at least one described cell;
(3) described power-supply management system is controlled described charger and is stopped described electrokinetic cell is charged, and the control charge equalizer begins each described cell is carried out the monomer equalizing charge, until being full of.
2. hybrid power according to claim 1 and the pure electric automobile intelligent charging equalization methods of electrokinetic cell, it is characterized in that, in step (1), described power battery management system predicts described electrokinetic cell by following steps need carry out the equalization charging: described power battery management system is gathered the described monomer voltage of described cell, judge whether the voltage difference between the described cell surpasses set point, if described voltage difference surpasses set point, then described power battery management system predicts that described electrokinetic cell need carry out the equalization charging.
3. hybrid power according to claim 1 and pure electric automobile is characterized in that with the intelligent charging equalization methods of electrokinetic cell described cell is the lithium ion single battery, and described peak is 3.6 volts.
4. hybrid power according to claim 1 and pure electric automobile is characterized in that with the intelligent charging equalization methods of electrokinetic cell described power battery management system is controlled described charger and described charge equalizer respectively by relay.
5. hybrid power and pure electric automobile are with the intelligent charging balancer of electrokinetic cell, it is characterized in that, comprise power battery management system, at least one monomer battery voltage acquisition elements, charger and at least one charge equalizer, described power battery management system is connected with described monomer battery voltage acquisition elements, described charger and described charge equalizer circuit respectively.
6. hybrid power according to claim 5 and the pure electric automobile intelligent charging balancer of electrokinetic cell, it is characterized in that, described hybrid power and pure electric automobile also comprise relay with the intelligent charging balancer of electrokinetic cell, and described power battery management system is connected with described charge equalizer circuit with described charger respectively by described relay.
7. hybrid power according to claim 5 and pure electric automobile is characterized in that with the intelligent charging balancer of electrokinetic cell the number of described charge equalizer equals the number of the cell of electrokinetic cell.
8. hybrid power according to claim 5 and pure electric automobile is characterized in that with the intelligent charging balancer of electrokinetic cell the number of described monomer battery voltage acquisition elements equals the number of the cell of electrokinetic cell.
CN2010102531007A 2010-08-13 2010-08-13 Intelligent charging equalization method and device of power battery for hybrid power vehicle and pure electric vehicle Pending CN101916888A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102420342A (en) * 2011-11-21 2012-04-18 淄博国利新电源科技有限公司 Pure electric vehicle power supply life-prolonging rapid charging method and control system thereof
CN102709981A (en) * 2012-06-07 2012-10-03 广州益维电动汽车有限公司 Energy-lossless equalizing charging device for series lithium ion battery pack
CN104539017A (en) * 2014-12-31 2015-04-22 深圳先进技术研究院 Power battery pack balancing system and method
CN107870304A (en) * 2017-11-09 2018-04-03 郑州云海信息技术有限公司 A kind of method and device of monitoring BBU batteries balance

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1481059A (en) * 2002-12-26 2004-03-10 北京机电研究所 Equipment for managing accumulator battery of motive power utilized in electric automobile

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1481059A (en) * 2002-12-26 2004-03-10 北京机电研究所 Equipment for managing accumulator battery of motive power utilized in electric automobile

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102420342A (en) * 2011-11-21 2012-04-18 淄博国利新电源科技有限公司 Pure electric vehicle power supply life-prolonging rapid charging method and control system thereof
CN102709981A (en) * 2012-06-07 2012-10-03 广州益维电动汽车有限公司 Energy-lossless equalizing charging device for series lithium ion battery pack
CN104539017A (en) * 2014-12-31 2015-04-22 深圳先进技术研究院 Power battery pack balancing system and method
CN107870304A (en) * 2017-11-09 2018-04-03 郑州云海信息技术有限公司 A kind of method and device of monitoring BBU batteries balance

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Application publication date: 20101215