CN109606201A - Overcharge protection method, system and vehicle for power battery - Google Patents
Overcharge protection method, system and vehicle for power battery Download PDFInfo
- Publication number
- CN109606201A CN109606201A CN201811601300.XA CN201811601300A CN109606201A CN 109606201 A CN109606201 A CN 109606201A CN 201811601300 A CN201811601300 A CN 201811601300A CN 109606201 A CN109606201 A CN 109606201A
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- CN
- China
- Prior art keywords
- power battery
- charging
- battery
- voltage
- overcharge protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H02J7/663—
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/547—Voltage
-
- H02J7/61—
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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
Landscapes
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
本发明提供了一种动力电池的过充电保护方法、系统及车辆。其中，动力电池的过充电保护方法，包括以下步骤：在对动力电池进行充电时，估算充电完成时间；采集动力电池中单体电池的电压；当采集所述动力电池中单体电池的电压出现异常时，判断充电时间是否达到充电完成时间；如果是，则终止充电。本发明的动力电池的过充电保护方法可以有效提高动力电池充电过程中的安全性。
The invention provides an overcharge protection method, system and vehicle of a power battery. Wherein, the overcharge protection method of the power battery includes the following steps: when charging the power battery, estimating the charging completion time; collecting the voltage of the single battery in the power battery; When abnormal, it is judged whether the charging time has reached the charging completion time; if so, the charging is terminated. The overcharge protection method of the power battery of the present invention can effectively improve the safety in the charging process of the power battery.
Description
Technical field
The present invention relates to automobile technical field, in particular to a kind of overcharge protection method of power battery, system and vehicle
?.
Background technique
In the related technology, during the charging process, battery management system is communicated power battery with charger, battery management
System controls the charge and discharge of power battery, as shown in Fig. 2, battery management system passes through monomer battery voltage and battery electricity
Whether amount is fully charged to battery to judge, such as: when monomer battery voltage reaches certain threshold voltage, battery management system
System, which is sent, stops charging instruction to charger, and charger responds and stops charging, and charging process is completed.
It has the following problems: since whether battery is fully charged is judged by monomer battery voltage, work as battery management
There is the case where error, broken string or Network Abnormal in system detection monomer battery voltage, and battery management system cannot detect monomer
Cell voltage occurs burning and even explodes, cause personnel and property loss at this point, easilying lead to battery overcharge,
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, the first purpose of this invention is to propose a kind of overcharge protection method of power battery.The power electric
The overcharge protection method in pond can effectively improve the safety during power battery charging.
It is another object of the present invention to the additives for overcharge protection systems for proposing a kind of power battery.
Another object of the present invention is to propose a kind of vehicle.
In order to achieve the above objectives, the embodiment of the first aspect of the present invention discloses a kind of additives for overcharge protection of power battery
Method, method includes the following steps: estimating charge completion time when charging to power battery；Acquire the power
The voltage of single battery in battery；When the voltage for acquiring single battery in the power battery occurs abnormal, when judging charging
Between whether reach the charge completion time；If it is, terminating charging.
The overcharge protection method of power battery according to an embodiment of the present invention, can by estimation charging complete when
Between, when the voltage of single battery occurs abnormal in acquiring power battery, whether charge completion time is reached according to the charging time,
Judge whether to terminate charging, over-charging of battery is avoided, thus the safety during improving power battery charging.
In one embodiment of the invention, the estimation charge completion time, comprising: detection charging current；According to filling
Charge completion time described in the capacity estimation of electric current and the power battery.
In one embodiment of the invention, there is exception in the voltage of single battery in the power battery, comprising: does not adopt
Collect the voltage of single battery in the power battery or does not receive the electricity of single battery in the power battery of acquisition
Pressure.
In one embodiment of the invention, the overcharge protection method of power battery, further includes: when the acquisition power
When the voltage of single battery does not occur abnormal in battery, judge whether the voltage of the single battery is higher than predetermined voltage threshold；
If it is, terminating charging.
The embodiment of second aspect of the present invention discloses a kind of additives for overcharge protection system of power battery.It include: estimation mould
Block, for estimating charge completion time when charging to power battery；Acquisition module, for acquiring the power battery
The voltage of middle single battery；Control module, for sentencing when the voltage for acquiring single battery in the power battery occurs abnormal
Whether the disconnected charging time reaches the charge completion time, and when reaching the charge completion time in the charging time, eventually
Only charge.
The additives for overcharge protection system of power battery according to an embodiment of the present invention, can by estimation charging complete when
Between, when the voltage of single battery occurs abnormal in acquiring power battery, whether charge completion time is reached according to the charging time,
Judge whether to terminate charging, over-charging of battery is avoided, thus the safety during improving power battery charging.
In one embodiment of the invention, the estimation block is for detecting charging current, and according to charging current and
Charge completion time described in the capacity estimation of the power battery.
In one embodiment of the invention, there is exception in the voltage of single battery in the power battery, comprising: does not adopt
Collect the voltage of single battery in the power battery or does not receive the electricity of single battery in the power battery of acquisition
Pressure.
In one embodiment of the invention, the control module is also used to when single battery in the acquisition power battery
Voltage judge whether the voltage of the single battery is higher than predetermined voltage threshold when not occurring abnormal, and in the monomer electricity
When the voltage in pond is higher than predetermined voltage threshold, charging is terminated.
In one embodiment of the invention, the additives for overcharge protection system of power battery, further includes: display module is used for
Show the charge completion time.
The embodiment of the third aspect of the present invention discloses a kind of vehicle, including described in above-mentioned second aspect embodiment
The additives for overcharge protection system of power battery.The vehicle can be single in acquisition power battery by the time of estimation charging complete
When the voltage of body battery occurs abnormal, whether charge completion time is reached according to the charging time, judges whether to terminate charging, avoid
Over-charging of battery, thus the safety during improving power battery charging.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the overcharge protection method of power battery described in one embodiment of the invention；
Fig. 2 is the overcharge protection method schematic diagram of power battery in the prior art；
Fig. 3 is the overcharge protection method schematic diagram of power battery described in one embodiment of the invention；
Fig. 4 is that the overcharge protection method of power battery described in one embodiment of the invention implements process；
Fig. 5 is the additives for overcharge protection system structure diagram of power battery described in one embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
Overcharge protection method, system and the vehicle of power battery according to an embodiment of the present invention are described with reference to the accompanying drawing
?.
Fig. 1 is the flow chart of the overcharge protection method of power battery according to an embodiment of the invention.Such as Fig. 1 institute
Show, the overcharge protection method of power battery the following steps are included:
S101: when charging to power battery, charge completion time is estimated.
In specific example, the time of charging complete is estimated, comprising: detection charging current；According to charging current and move
The capacity estimation charge completion time of power battery.
In general, estimating charge completion time by battery management system, charge completion time is pre-stored in battery management system
In system, charge completion time, second level threshold values of the charge completion time as additives for overcharge protection can also be shown by charger
Carry out protection use.
S102: the voltage of single battery in acquisition power battery.
Specifically, the voltage of single battery is acquired by battery management system in power battery.In specific example,
Battery management system includes main control module and clump control module, and main control module is mainly used for overcharging, the protection of excess temperature control, is responsible for height
Push back the closure and disconnection on road；Clump control module is mainly responsible for the voltage of single battery and the acquisition of temperature.Battery management system can
To judge battery failures, present battery status is estimated, by Balance route battery consistency, effectively extend battery uses the longevity
Life.
S103: when the voltage for acquiring single battery in power battery occurs abnormal, judge whether the charging time reaches and fill
The electric deadline.
Specifically, when error, broken string or internal communication event occurs in the voltage of battery management system acquisition single battery
When barrier, there is exception in the voltage that will lead to single battery in acquisition power battery, comprising: does not collect single in the power battery
The voltage of body battery or the voltage for not receiving single battery in the power battery of acquisition.
At this point, battery management system judges whether the charging time reaches charge completion time, i.e., whether reach overcharge guarantor
The second level threshold values of shield.
S104: if it is, terminating charging.
As shown in figure 3, battery management system is communicated with charger, over-charging of battery in order to prevent, when acquisition power electric
When the voltage of single battery occurs abnormal in pond, if it is determined that the charging time has reached charge completion time, battery management system
It can stop charging instruction to charger transmission request, charger lowers electric current stopping output, battery management system after receiving instruction
Disconnect it is total just, total negative relay, while battery capacity is adapted to 100%, charging process is completed, wherein battery capacity indicates
The at a time available power of battery, value from 0 to 100%.
In addition, then being judged by battery management system single when the voltage for acquiring single battery in battery does not occur abnormal
Whether the voltage of body battery is higher than predetermined voltage threshold values, if it is, sending request stops charging instruction to charger, termination is filled
Electricity.Such as: ternary battery core charge cutoff voltage is 4.2V, when the voltage for acquiring single battery is higher than 4.2V, then sends request,
High-voltage relay is disconnected, charging is stopped.
That is, the over-charging of battery electric protection threshold values of battery management system has second class protection threshold values, first class of protection valve
Value is the ceiling voltage of single battery, and second class protection threshold values is charge completion time, when the electricity for the single battery for receiving acquisition
When pressing the ceiling voltage higher than single battery, high-voltage relay is disconnected, stops charging, when the voltage appearance for acquiring single battery is different
Chang Shi, can be by judging whether the charging time reaches charge completion time, it is determined whether high-voltage relay is disconnected, to improve
The safety of battery charging.
As shown in figure 4, the overcharge protection method of power battery the specific implementation process is as follows:
1, charge physical connected phase: charging starts, and battery management system and charger establish physical connection, in general, adopting
Use CAN bus agreement as the communication bus form and communication protocol of charger；
2, charge parameter configuration phase: in this stage, charger sends charger maximum output energy to battery management system
Power message, battery management system judge whether to be able to carry out charging according to charger maximum output ability；
3, the charging stage: after the completion of configuration phase, battery management system and charger enter the charging stage.Entirely charging
Stage, battery management system monitor the voltage status of single battery in real time, and calculate charge completion time, battery management system root
Whether meet the end-of-charge condition of setting according to the voltage status of single battery and when whether the charging time reaches charging complete
Between to determine whether terminate charging；
4, charge ending phase: if battery management system judges that the voltage of single battery is higher than scheduled first class of protection valve
Value then sends request to charger and stops charging instruction, is then turned off high-voltage relay, stops charging and completing；If battery
There is exception in the voltage that management system acquires single battery in power battery, and the voltage of single battery can not be sent to battery management
System can not then trigger single battery first class of protection threshold values, and continuing charging will lead to over-charging of battery, at this point, battery management system
It may determine that whether the charging time reaches charge completion time i.e. second class protection threshold values, if meeting condition, battery management system
High-voltage relay is directly disconnected, charging is stopped, avoiding that the safety accidents such as kindling, explosion occur because of over-charging of battery.
The overcharge protection method of power battery according to the present invention can adopted by the time of estimation charging complete
When the voltage for collecting single battery in power battery occurs abnormal, whether charge completion time is reached according to the charging time, judgement is
No termination charging, avoids over-charging of battery, thus the safety during improving power battery charging.
Fig. 5 is the additives for overcharge protection system structure diagram of power battery according to an embodiment of the invention.Such as Fig. 5 institute
Show, the additives for overcharge protection system 500 of power battery according to an embodiment of the invention, comprising: estimation block 510 acquires mould
Block 520 and control module 530.
Wherein, estimation block 510 is used for when charging to power battery, estimates charge completion time；Acquisition module
520 for acquiring the voltage of single battery in power battery；Control module 530 is used for when single battery in acquisition power battery
When voltage occurs abnormal, judge whether the charging time reaches charge completion time, and reach charge completion time in the charging time
When, terminate charging.
In one embodiment of the invention, estimation block 510 is for detecting charging current, and according to charging current and moves
The capacity estimation charge completion time of power battery.
In one embodiment of the invention, there is exception in the voltage of single battery in power battery, comprising: does not collect
In power battery the voltage of single battery or the voltage of single battery in the power battery of acquisition is not received.
In one embodiment of the invention, control module 530 is also used to the electricity when single battery in acquisition power battery
When pressure does not occur abnormal, judge whether the voltage of single battery is higher than predetermined voltage threshold, and be higher than in the voltage of single battery
When predetermined voltage threshold, charging is terminated.
In one embodiment of the invention, further includes: display module, for showing charge completion time.
The additives for overcharge protection system of power battery according to an embodiment of the present invention, can by estimation charging complete when
Between, when the voltage of single battery occurs abnormal in acquiring power battery, whether charge completion time is reached according to the charging time,
Judge whether to terminate charging, over-charging of battery is avoided, thus the safety during improving power battery charging.
Further, the embodiment of the present invention proposes a kind of vehicle, the power being provided in any one embodiment as above
The additives for overcharge protection system of battery.The vehicle can by estimate charging complete time, acquisition power battery in monomer
When the voltage of battery occurs abnormal, whether charge completion time is reached according to the charging time, judges whether to terminate charging, avoids electricity
Pond overcharges, thus the safety during improving power battery charging.
In addition, other compositions of vehicle according to an embodiment of the present invention and effect are for those of ordinary skill in the art
For be all it is known, be not repeated herein.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811601300.XA CN109606201A (en) | 2018-12-26 | 2018-12-26 | Overcharge protection method, system and vehicle for power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811601300.XA CN109606201A (en) | 2018-12-26 | 2018-12-26 | Overcharge protection method, system and vehicle for power battery |
Publications (1)
| Publication Number | Publication Date |
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| CN109606201A true CN109606201A (en) | 2019-04-12 |
Family
ID=66012407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811601300.XA Pending CN109606201A (en) | 2018-12-26 | 2018-12-26 | Overcharge protection method, system and vehicle for power battery |
Country Status (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113119759A (en) * | 2019-12-30 | 2021-07-16 | 观致汽车有限公司 | Charging strategy of electric vehicle, computer readable storage medium and vehicle |
| CN116061740A (en) * | 2022-09-08 | 2023-05-05 | 湖北亿纬动力有限公司 | Battery charging method, device, equipment and storage medium |
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| EP2701272A2 (en) * | 2012-08-21 | 2014-02-26 | Makita Corporation | Charger |
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| US6340880B1 (en) * | 1999-11-11 | 2002-01-22 | Mitsumi Electric Co., Ltd. | Method of protecting a chargeable electric cell |
| CN2694587Y (en) * | 2003-09-09 | 2005-04-20 | 李知非 | Battery control protection integrated circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113119759A (en) * | 2019-12-30 | 2021-07-16 | 观致汽车有限公司 | Charging strategy of electric vehicle, computer readable storage medium and vehicle |
| CN116061740A (en) * | 2022-09-08 | 2023-05-05 | 湖北亿纬动力有限公司 | Battery charging method, device, equipment and storage medium |
| CN116061740B (en) * | 2022-09-08 | 2025-07-29 | 湖北亿纬动力有限公司 | Method, device, equipment and storage medium for charging battery |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190412 |