CN110015143B - Lithium battery system, lithium battery system management method and application - Google Patents
Lithium battery system, lithium battery system management method and application Download PDFInfo
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- CN110015143B CN110015143B CN201810218627.2A CN201810218627A CN110015143B CN 110015143 B CN110015143 B CN 110015143B CN 201810218627 A CN201810218627 A CN 201810218627A CN 110015143 B CN110015143 B CN 110015143B
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- lithium battery
- power switch
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
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- Mechanical Engineering (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a lithium battery system, a lithium battery system management method and application. The lithium battery system includes: the battery management system comprises a lithium battery pack and a battery management system, wherein the lithium battery pack consists of more than one lithium battery cell, and a fusing mechanism is connected in series with the positive electrode end of the lithium battery pack; the negative end of the lithium battery pack is respectively connected with the first power switch and the second power switch in series, and a power resistor is also connected between the negative end of the lithium battery pack and the second power switch in series; the battery management system is also respectively connected with the lithium battery pack, the first power switch and the second power switch. The lithium battery system provided by the invention can directly replace a lead-acid battery, does not need to change the hardware such as a circuit of the motor control system of the original electric vehicle, does not need to change other structures of the electric vehicle, and can be directly connected with the motor control systems of various models.
Description
Technical Field
The invention particularly relates to a lithium battery system, a lithium battery system management method and application.
Background
In the face of increasingly severe energy situation and social environmental protection pressure, the lithium electric forklift is considered as one of the inevitable choices for transformation and upgrading of the electric forklift industry by people. Because the lithium battery and the lead-acid battery are power batteries of two different systems, and the battery principles are different, when the lead-acid battery of the electric vehicle is converted into the lithium ion battery, the management method of the electric vehicle also needs to be changed:
1) the traditional forklift uses a lead-acid battery pack which is not provided with a battery management system, so that a communication interface does not exist between a motor controller and the lead-acid battery pack;
2) when the lithium battery pack is used as a power supply of the conventional electric forklift, the lithium battery pack is provided with a BMS (battery management system), the BMS and a motor control system of a vehicle are communicated in a CAN (controller area network) mode, a standard CAN2.0B communication protocol is followed, an electric control system collects the state of charge (SOC) and fault information of the battery, measures such as power limitation and battery disconnection are implemented according to a formulated management mechanism, and the safety of the whole vehicle is ensured.
Disclosure of Invention
The invention mainly aims to provide a lithium battery system, a lithium battery system management method and application, so as to overcome the defects of the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:
an embodiment of the present invention provides a lithium battery system, including: the battery management system comprises a lithium battery pack and a battery management system, wherein the lithium battery pack consists of more than one lithium battery cell, and a fusing mechanism is connected in series with the positive electrode end of the lithium battery pack; the negative end of the lithium battery pack is respectively connected with the first power switch and the second power switch in series, and a power resistor is also connected between the negative end of the lithium battery pack and the second power switch in series; the battery management system is also respectively connected with the lithium battery pack, the first power switch and the second power switch and can at least control the on or off states of the first power switch and the second power switch.
The embodiment of the invention also provides a lithium battery system management method, which comprises the following steps:
providing the lithium battery system, and connecting a positive electrode end and a negative electrode end of the lithium battery system with load equipment;
the lithium battery system can be at least in the following two states:
state 1: the first power switch is closed; the second power switch is turned off;
state 2: the first power switch is turned off and the second power switch is kept off.
The embodiment of the invention also provides application of the lithium battery system or the management method of the lithium battery system replacing the lead-acid battery in the field of electric energy vehicles.
The embodiment of the invention also provides an electric energy vehicle with double power supplies, which comprises an electric energy vehicle body, a motor control system and the lithium battery system.
Compared with the prior art, the invention has the advantages that: the lithium battery system provided by the invention has a simple structure, can be used for directly replacing a lead-acid battery, does not need to change hardware such as a circuit and the like of a motor control system of an original electric vehicle, and does not need to change other structures of the electric vehicle.
Drawings
Fig. 1 is a schematic structural diagram of a lithium battery system according to an exemplary embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a method for managing a lithium battery system according to an exemplary embodiment of the present invention.
Detailed Description
In view of the deficiencies in the prior art, the inventors of the present invention have made extensive studies and extensive practices to provide technical solutions of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.
An embodiment of the present invention provides a lithium battery system, including: the battery management system comprises a lithium battery pack and a battery management system, wherein the lithium battery pack consists of more than one lithium battery cell, and a fusing mechanism is connected in series with the positive electrode end of the lithium battery pack; the negative end of the lithium battery pack is respectively connected with the first power switch and the second power switch in series, and a power resistor is also connected between the negative end of the lithium battery pack and the second power switch in series; the battery management system is also respectively connected with the lithium battery pack, the first power switch and the second power switch and can at least control the on or off states of the first power switch and the second power switch.
The embodiment of the invention also provides a lithium battery system management method, which comprises the following steps:
providing the lithium battery system, and connecting a positive electrode end and a negative electrode end of the lithium battery system with load equipment;
the lithium battery system can be at least in the following two states:
state 1: the first power switch is closed; the second power switch is turned off;
state 2: the first power switch is turned off and the second power switch is kept off;
1) the BMS monitors the voltage of each lithium cell in the lithium battery pack and the charging/discharging current of the lithium battery pack in real time, and calculates the SOC (state of charge) of the lithium battery pack;
2) when the lithium battery system is normally charged/discharged and the SOC is more than SOC1(SOC1 is a certain SOC value set according to specific conditions), the lithium battery system is in a state 1;
3) the BMS regulates the lithium battery system to enter a state 2 under at least any one of overvoltage/undervoltage, overcurrent and short circuit in the charging/discharging process of the lithium battery pack;
4) during the discharging process, when the SOC < SOC1 or the voltage Vi of any single lithium battery cell is lower than V1 (the set voltage value of the single lithium battery cell V1, which may be set according to specific situations) or the total voltage V of the lithium battery pack is lower than V2(V2 is a certain set voltage value):
a) when the discharge current I is always less than I1(I1 is a specific current value which can be set according to specific conditions), the system discharges normally until the discharge is finished;
b) when discharge current I > I1:
i) closing the second power switch, then opening the first power switch, and keeping for t seconds; thereafter entering state 1; counting the operation times, and marking as N;
ii) when the SOC > SOC1 or the voltage Vi of any lithium battery cell is higher than V1 or the total voltage V of the lithium battery pack is higher than V2, clearing the count N;
iii) when N ═ m, the lithium battery system enters state 2 and remains until other conditions cause the system to enter state 1, such as human intervention, timing, or detection of a charger, etc.
The embodiment of the invention also provides application of the lithium battery system or the management method of the lithium battery system replacing the lead-acid battery in the field of electric energy vehicles.
The embodiment of the invention also provides an electric energy vehicle with double power supplies, which comprises an electric energy vehicle body, a motor control system and the lithium battery system.
Further, the motor control system is directly connected with the lithium battery system.
The technical solution, the implementation process and the principle thereof will be further explained with reference to the drawings.
Referring to fig. 1, a lithium battery system includes: the battery pack comprises a lithium battery pack 1 consisting of more than one lithium battery cell and a battery management system 6, wherein a fuse 2 (namely a fusing mechanism) is connected in series with the positive terminal of the lithium battery pack 1; the negative end of the lithium battery pack 1 is respectively connected with the first power switch 5 and the second power switch 3 in series, and a power resistor 4 is also connected between the negative end of the lithium battery pack and the second power switch 3 in series; the battery management system 6 is further connected to the lithium battery pack 1, the first power switch 5, and the second power switch 3, respectively, and is capable of controlling at least a closed state or an open state of the first power switch and the second power switch.
Referring to fig. 2, when a lead-acid battery is directly replaced by a lithium battery system, a positive terminal and a negative terminal of the lithium battery system are connected to a load device;
the lithium battery system can be at least in the following two states:
state 1: the first power switch is closed; the second power switch is turned off;
state 2: the first power switch is turned off and the second power switch is kept off;
1) the BMS monitors the voltage of each lithium cell in the lithium battery pack and the charging/discharging current of the lithium battery pack in real time, and calculates the SOC of the lithium battery pack;
2) under the state that the battery is normally charged/discharged and the SOC is more than 20%, the lithium battery system is in a state 1;
3) the BMS regulates the lithium battery system to enter a state 2 under at least any one of overvoltage/undervoltage, overcurrent and short circuit in the charging/discharging process of the lithium battery pack;
4) during the discharging process, when the SOC is less than 20%, or the voltage Vi of any lithium battery cell is lower than 2.9V, or the total voltage V of the lithium battery pack is lower than 48V:
a) when the discharge current I is always less than 30A, the system normally discharges until the discharge is finished;
b) when the discharge current I > 30A:
i) the second power switch is closed firstly, then the first power switch is opened, and the time is kept for 10 seconds; thereafter entering state 1; counting the operation times, and marking as N;
ii) when the SOC is more than 20% or the voltage Vi of any lithium battery cell is higher than 2.9V or the total voltage V of the lithium battery pack is higher than 48V, clearing the count N;
iii) when N is 3, the lithium battery system enters state 2 and remains until other conditions cause the system to enter state 1, such as human intervention, timing, or detection of a charger, etc.
The lithium battery system provided by the invention has a simple structure, can be used for directly replacing a lead-acid battery, does not need to change hardware such as a circuit and the like of a motor control system of an original electric vehicle, and does not need to change other structures of the electric vehicle.
It should be understood that the above-mentioned embodiments are merely illustrative of the technical concepts and features of the present invention, which are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and therefore, the protection scope of the present invention is not limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (3)
1. The dual-power electric energy vehicle is characterized by comprising an electric vehicle energy vehicle body, a motor control system, a lead-acid battery and a lithium battery system, wherein the motor control system can be directly connected with the lead-acid battery or the lithium battery system;
the lithium battery system comprises a lithium battery pack and a battery management system, wherein the lithium battery pack consists of more than one lithium battery cell, and a fusing mechanism is connected in series with the positive electrode end of the lithium battery pack; the negative end of the lithium battery pack is respectively connected with the first power switch and the second power switch in series, and a power resistor is also connected between the negative end of the lithium battery pack and the second power switch in series; the battery management system is also respectively connected with the lithium battery pack, the first power switch and the second power switch;
the lithium battery system can be at least in the following two states:
state 1: the first power switch is closed; the second power switch is turned off;
state 2: the first power switch is turned off and the second power switch is kept off.
2. The dual-power-supply electric power vehicle according to claim 1, characterized in that: when the lithium battery system is used for directly replacing a lead-acid battery, connecting a positive electrode end and a negative electrode end of the lithium battery system with load equipment;
the lithium battery system can be at least in the following two states:
state 1: the first power switch is closed; the second power switch is turned off;
state 2: the first power switch is turned off and the second power switch is kept off.
3. The dual-power-supply electric power vehicle according to claim 1, characterized in that: when a lithium battery system is used to directly replace a lead-acid battery, the working process of the lithium battery system at least comprises:
1) the battery management system monitors the voltage of each lithium cell in the lithium battery pack and the charging/discharging current of the lithium battery pack in real time and calculates the SOC of the lithium battery pack;
2) under the state that the battery is normally charged/discharged and the SOC is more than 20%, the lithium battery system is in a state 1;
3) the battery management system regulates the lithium battery system to enter a state 2 under at least any one of overvoltage/undervoltage, overcurrent and short circuit in the charging/discharging process of the lithium battery pack;
4) during the discharging process, when the SOC is less than 20%, or the voltage Vi of any lithium battery cell is lower than 2.9V, or the total voltage V of the lithium battery pack is lower than 48V:
a) when the discharge current I is always less than 30A, the system normally discharges until the discharge is finished;
b) when the discharge current I > 30A:
i) the second power switch is closed firstly, then the first power switch is opened, and the time is kept for 10 seconds; thereafter entering state 1; counting the operation times, and marking as N;
ii) when the SOC is more than 20% or the voltage Vi of any lithium battery cell is higher than 2.9V or the total voltage V of the lithium battery pack is higher than 48V, clearing the count N;
iii) when N =3, the lithium battery system enters state 2 and remains until a specified condition causes the system to enter state 1, the specified condition including human intervention, timing, or detection of a charger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810218627.2A CN110015143B (en) | 2018-03-16 | 2018-03-16 | Lithium battery system, lithium battery system management method and application |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810218627.2A CN110015143B (en) | 2018-03-16 | 2018-03-16 | Lithium battery system, lithium battery system management method and application |
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| CN110015143A CN110015143A (en) | 2019-07-16 |
| CN110015143B true CN110015143B (en) | 2021-01-19 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065153A (en) * | 2014-05-07 | 2014-09-24 | 上海浩锐动力科技有限公司 | Dual-power coupling device and hybrid-power electric automobile with same |
| CN106114252A (en) * | 2016-06-21 | 2016-11-16 | 观致汽车有限公司 | The method and system that battery uses are managed service life based on battery contactor |
| CN205687496U (en) * | 2016-06-08 | 2016-11-16 | 宁波市威源电子科技有限公司 | Electri forklift lifting device starts primary heat transport system |
| CN106494254A (en) * | 2016-11-29 | 2017-03-15 | 北京新能源汽车股份有限公司 | A kind of power battery charging Protection control system, method and device |
| CN107719155A (en) * | 2017-09-11 | 2018-02-23 | 吉利汽车研究院（宁波）有限公司 | Battery management system and method |
-
2018
- 2018-03-16 CN CN201810218627.2A patent/CN110015143B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065153A (en) * | 2014-05-07 | 2014-09-24 | 上海浩锐动力科技有限公司 | Dual-power coupling device and hybrid-power electric automobile with same |
| CN205687496U (en) * | 2016-06-08 | 2016-11-16 | 宁波市威源电子科技有限公司 | Electri forklift lifting device starts primary heat transport system |
| CN106114252A (en) * | 2016-06-21 | 2016-11-16 | 观致汽车有限公司 | The method and system that battery uses are managed service life based on battery contactor |
| CN106494254A (en) * | 2016-11-29 | 2017-03-15 | 北京新能源汽车股份有限公司 | A kind of power battery charging Protection control system, method and device |
| CN107719155A (en) * | 2017-09-11 | 2018-02-23 | 吉利汽车研究院（宁波）有限公司 | Battery management system and method |
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Address after: 215000 Room 201, building 11, Xibei District, Nancheng, Suzhou, No. 99, Jinjihu Avenue, Suzhou Industrial Park, Suzhou area, China (Jiangsu) pilot Free Trade Zone, Suzhou City, Jiangsu Province Applicant after: Jiangsu Ganfeng Power Technology Co., Ltd Address before: 215000, Jiangsu, Suzhou Industrial Park, Jinji Lake Road, No. 99, Suzhou nano West North District 11, Room 201, Suzhou Applicant before: JIANGSU YRONG TECHNOLOGY Co.,Ltd. |
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