CN104852418A - Method and system preventing over-discharge of battery during charging process - Google Patents
Method and system preventing over-discharge of battery during charging process Download PDFInfo
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- CN104852418A CN104852418A CN201410802420.1A CN201410802420A CN104852418A CN 104852418 A CN104852418 A CN 104852418A CN 201410802420 A CN201410802420 A CN 201410802420A CN 104852418 A CN104852418 A CN 104852418A
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides a method and system preventing over-discharge of a battery during a charging process. The method includes acquiring initial voltage of the battery at the start time point of the charging process; acquiring real time voltage of the battery during the charging process; comparing the initial voltage with the real time voltage; cutting off all circuits of the battery when the real time voltage is smaller than or equal to the initial voltage. A technical problem that a battery of an electric automobile may charge a low-voltage storage battery when being charged and battery over-discharge may be caused when charge failure occurs is solved. The technical scheme provided by the invention is simple in implementation and easy to realize, and prolongs the service lifetime of the battery and improves the safety performance of the electric automobile.
Description
Technical field
The present invention relates to powered battery technical field.Specifically, relate to and a kind ofly cross the method and system put when preventing battery to charge.
Background technology
The excess emissions of greenhouse gas, cause global warming, electric automobile has that noise is little, pollution-free, zero discharge, energy conversion efficiency high, promotion and application are widely obtained, meanwhile, the input of a large amount of electrically-charging equipments will add the operation control difficulty of bulk power grid, therefore, stablizes electric automobile, charging efficiently has great importance.
Electrokinetic cell is the core component of electric automobile, and the principal element affecting electric motor car application is fail safe and the cost of electrokinetic cell, and extending battery is one of effective way reducing use cost.In order to make the functional and life of electrokinetic cell, must effectively manage battery and control, wherein, in charging process, prevent electrokinetic cell from overcharging and cross that to put be the importance improving electrokinetic cell performance and life-saving.
As shown in Figure 1, for the charging system structural representation of existing electric automobile, comprising: electrokinetic cell, high-voltage load, low tension battery, battery management system (BMS), charger, DC-DC converter, cathode contact device ZJ1, positive contact device ZJ2, charging contactor ZJ3 and DC contactor ZJ4.Electrokinetic cell is for high-voltage load and low tension battery provide the device of electric energy, charger is when electrokinetic cell feed, the device of electricity is mended to electrokinetic cell, the disconnection of battery management system control cathode contact device ZJ1, positive contact device ZJ2 and charging contactor ZJ3 is with closed, and monitor the state of electrokinetic cell, carry out communication with charger simultaneously.
Fig. 2 shows flow chart during existing charging electric vehicle, after being connected with electrical network, charger provides 12V often electric to battery management system, battery management system carries out self-inspection to the state of electrokinetic cell, after completing, battery management system controls closed cathode contact device, the negative pole of electrokinetic cell is connected with charger and DC-DC converter respectively, and anticathode contactor carries out self-inspection, then closed charging contactor is controlled thus conducting comprises the charge circuit of electrokinetic cell and charger, send charge request, when detecting that namely battery enters charged state after charger is opened.Simultaneously the normal electricity of 12V makes DC contactor ZJ4 adhesive, DC-DC converter starts working, and electrokinetic cell is charged to low tension battery by DC-DC converter.Battery management system (BMS) and charger carry out information interaction, and charging start and send charger when completing open out code.But; if there is charge fault (as charger damages; charging insurance burns out or charge protection/heating relay damaged etc.) and cannot charge time; DC-DC converter still has the normal electricity supply of 12V; and negative pole relay is in closure state all the time; therefore DC-DC converter works always; along with the prolongation of time; electrokinetic cell continues to charge to low tension battery; low-voltage electrical appliance on vehicle and wire harness have certain internal resistance; along with the prolongation of time, the voltage of electrokinetic cell reduces gradually, and then causes electrokinetic cell to be crossed putting.After electrokinetic cell is crossed and put, battery capacity decline, internal resistance increase, the lost of life and irrecoverable can be caused.
Summary of the invention
For this reason, technical problem to be solved by this invention is that the battery of existing electric automobile can to a low tension battery charging when charging, therefore once charge fault occurs battery can be caused to cross put, thus propose a kind ofly to cross the method and system put when preventing battery to charge.
For solving the problems of the technologies described above, the invention provides following technical scheme:
Cross a method of putting when preventing battery to charge, comprise the following steps:
Obtain the initial voltage of charging start time battery;
Obtain the real-time voltage of battery in charging process;
Initial voltage and real-time voltage are compared;
When real-time voltage is less than or equal to initial voltage, then cut off all loops of battery.
Preferably, the step obtaining the real-time voltage of battery in charging process comprises: preset time period threshold value, obtains the real-time voltage from the charging moment of start time after this time period threshold value.
Preferably, the step obtaining the real-time voltage of battery in charging process comprises: arrange a sense cycle, periodically obtains the real-time voltage of battery in charging process.
Preferably, also comprise before obtaining the step of the initial voltage of charging start time battery:
After being connected with electrical network, charger is powered to battery management system, and battery management system carries out self-inspection to the state of battery;
Battery management system controls closed cathode contact device, the negative pole making battery respectively with the connection of DC-DC converter, charger;
Battery management system anticathode contactor carries out self-inspection;
Battery management system controls closed charging contactor, and anode is connected with charger, and battery enters charged state.
Preferably, also comprise before obtaining the initial voltage step of charging start time battery:
The electromagnetic circuit of charger conducting DC contactor, make the adhesive of DC contactor, the loop of conducting DC-DC converter and low tension battery, DC-DC converter is started working;
Battery is charged to low tension battery by DC-DC converter.
Preferably, further comprising the steps of then cut off the step in all loops of battery when real-time voltage is less than or equal to initial voltage after:
Send charge fault prompting.
Preferably, the step then cutting off all loops of battery when real-time voltage is less than or equal to initial voltage comprises:
Disconnect charging contactor, in order to disconnect the charge circuit comprising battery and charger;
Disconnect cathode contact device, in order to disconnect the loop that battery charges to low tension battery.
Cross a system of putting when preventing battery to charge, comprising:
Initial voltage acquisition module: be used for obtain charging start time battery initial voltage;
Real-time voltage acquisition module: the real-time voltage being used for obtaining battery in charging process;
Voltage comparison module: be used for initial voltage and real-time voltage to compare;
Processing module: when real-time voltage is less than or equal to initial voltage, is used for cutting off all loops of battery.
Preferably, real-time voltage acquisition module comprises:
Time period threshold preset unit: be used for a default time period threshold value, thus obtain the real-time voltage from the charging moment of start time after this time period threshold value; Or,
Sense cycle setting unit: be used for arranging a sense cycle, thus the real-time voltage periodically obtaining battery in charging process.
Preferably, also comprise:
Fault cues module: when real-time voltage is less than or equal to initial voltage, after cutting off all loops of battery, is used for sending charge fault prompting.
Technique scheme of the present invention has the following advantages compared to existing technology:
Provided by the inventionly cross the method and system put when preventing battery to charge, the initial voltage of battery when the real-time voltage of battery starts with charging after charging a period of time is compared, when real-time voltage is less than or equal to initial voltage, then judge charge fault occurs, and cut off all loops of battery, especially it is to the loop of low tension battery charging, puts to prevent the mistake of battery.Can also to be glimmered by fault cues lamp or the fault cues mode such as audible alarm reminds people's battery to charge to break down, so that overhaul in time, ensure the use of electric automobile.Technical scheme provided by the invention is simple to operate, easily realize, and simultaneously by effectively managing battery and controlling, improves the useful life of battery and the fail safe of electric automobile to a certain extent.
Accompanying drawing explanation
Electrical block diagram when Fig. 1 is existing charging batteries of electric automobile;
Fig. 2 is existing charging batteries of electric automobile flow chart;
Fig. 3 is that one embodiment of the invention a kind of crosses the method flow diagram put when preventing battery to charge;
Fig. 4 is that another embodiment of the present invention a kind of crosses the method flow diagram put when preventing battery to charge;
Fig. 5 is that one embodiment of the invention a kind of crosses the system diagram put when preventing battery to charge.
Embodiment
In order to make those skilled in the art person understand content of the present invention better, below in conjunction with drawings and Examples, technical scheme provided by the present invention is described in further detail.
Embodiment 1
As shown in Figure 3, present embodiments provide and a kind ofly cross the method for putting when preventing battery to charge, comprise the following steps:
S1: the initial voltage obtaining charging start time battery;
S2: the real-time voltage obtaining battery in charging process;
S3: initial voltage and real-time voltage are compared;
S4: when real-time voltage is less than or equal to initial voltage, then cut off all loops of battery.
Provided by the inventionly cross the method for putting when preventing battery to charge, the initial voltage of battery when the real-time voltage of battery starts with charging after charging a period of time is compared, when real-time voltage is less than or equal to initial voltage, then judge charge fault occurs, and cut off all loops of battery, especially it is to the loop of low tension battery charging, puts to prevent the mistake of battery.The technical scheme that the present embodiment provides is simple to operate, easily realize, and simultaneously by effectively managing battery and controlling, improves the useful life of battery and the fail safe of electric automobile to a certain extent.
Preferably, then cut off all loops of battery when real-time voltage is less than or equal to initial voltage after, fault cues device sends charge fault prompting.Fault cues device is preferably fault cues lamp or voice guard.Sending charge fault prompting is break down to remind people's battery to charge, so that overhaul in time, ensures the use of electric automobile.
Preferably, the process obtaining the real-time voltage of battery in charging process comprises: preset time period threshold value, obtains the real-time voltage from the charging moment of start time after this time period threshold value.
As convertible execution mode of the present invention, the process obtaining the real-time voltage of battery in charging process also can arrange a sense cycle, periodically obtains the real-time voltage of battery in charging process.
Particularly, also comprise before obtaining the initial voltage of charging start time battery:
After being connected with electrical network, charger is powered to battery management system, and battery management system carries out self-inspection to the state of battery; Battery management system controls closed cathode contact device, and the negative pole of battery is connected with DC-DC converter, charger respectively; Battery management system anticathode contactor carries out self-inspection; Battery management system controls closed charging contactor, and anode is connected with charger, and battery enters charged state.Meanwhile: charger provides the 12V voltage turn-on DC electromagnetic circuit of contactor, and make the adhesive of DC contactor, the loop of conducting DC-DC converter and low tension battery, DC-DC converter is started working; Battery is charged to low tension battery by DC-DC converter.
Particularly, all circuit process then cutting off battery when real-time voltage is less than or equal to initial voltage comprise:
Disconnect charging contactor, in order to disconnect the charge circuit comprising battery and charger;
Disconnect cathode contact device, in order to disconnect the loop that battery charges to low tension battery.To prevent when charging is broken down battery also can outside transmission of electric energy thus cause it to cross putting, the performance of infringement battery, reduce its useful life.
Embodiment 2
As shown in Figure 4, present embodiments provide and a kind ofly cross the method for putting when preventing battery to charge, comprise the following steps:
S11: after being connected with electrical network, charger is powered to battery management system, and battery management system carries out self-inspection to the state of battery.
S12: battery management system controls closed cathode contact device, and the negative pole of battery is connected with DC-DC converter, charger respectively.
S13: battery management system anticathode contactor carries out self-inspection.
S14: battery management system controls closed charging contactor, and anode is connected with charger.
S15: battery management system sends charge request.
S16: battery enters charged state after battery management system detects charger opening signal.
S17: obtain and record charging start time battery initial voltage.
S18: obtain and record the real-time voltage of a certain moment battery in charging process.
S19: initial voltage and real-time voltage compare by battery management system.
S20: when real-time voltage is less than or equal to initial voltage, then battery management system controls charge closing machine and cuts off all loops of battery, comprise the loop disconnecting charging contactor and charge to low tension battery to disconnect battery with the charge circuit and disconnection cathode contact device that disconnect battery, in addition, also send charge fault prompting to there occurs fault be convenient to fix a breakdown in time in order to indicating battery charging.When real-time voltage is greater than initial voltage, then battery management system controls to continue charging until control charge closing machine when battery is full of.
Embodiment 3
As shown in Figure 5, present embodiments provide and a kind ofly cross the system of putting when preventing battery to charge, comprising:
Initial voltage acquisition module M1: be used for obtain charging start time battery initial voltage;
Real-time voltage acquisition module M2: the real-time voltage being used for obtaining battery in charging process;
Voltage comparison module M3: be used for initial voltage and real-time voltage to compare;
Processing module M4: when real-time voltage is less than or equal to initial voltage, is used for cutting off all loops of battery.
Provided by the inventionly cross the system of putting when preventing battery to charge, the initial voltage of battery when the real-time voltage of battery starts with charging after charging a period of time is compared, when real-time voltage is less than or equal to initial voltage, then judge charge fault occurs, and cut off all loops of battery, especially it is to the loop of low tension battery charging, puts to prevent the mistake of battery.The technical scheme that the present embodiment provides is simple to operate, easily realize, and simultaneously by effectively managing battery and controlling, improves the useful life of battery and the fail safe of electric automobile to a certain extent.
Particularly, real-time voltage acquisition module M2 comprises:
Time period threshold preset unit: be used for a default time period threshold value, thus obtain the real-time voltage from the charging moment of start time after this time period threshold value.
As replaceable execution mode of the present invention, real-time voltage acquisition module M2 also can comprise: sense cycle setting unit, is used for arranging a sense cycle, thus periodically obtains the real-time voltage of battery in charging process.
Preferably, cross the system of putting when preventing battery to charge also to comprise:
Fault cues module: when real-time voltage is less than or equal to initial voltage, after cutting off all loops of battery, is used for sending charge fault prompting.
Particularly, cross the system of putting when preventing battery to charge also to comprise:
Battery status selftest module: for before the initial voltage obtaining charging start time battery, after being connected with electrical network by charger, charger is powered to battery management system, and battery management system carries out self-inspection to the state of battery;
Cathode contact device closes module: control closed cathode contact device by battery management system, the negative pole of battery is connected with DC-DC converter, charger respectively;
Cathode contact device selftest module: carry out self-inspection by battery management system anticathode contactor;
Charging contactor closes module: control closed charging contactor by battery management system, anode is connected with charger, and battery enters charged state.
Particularly, cross the system of putting when preventing battery to charge also to comprise:
DC contactor closes module: for before the initial voltage obtaining charging start time battery, the electromagnetic circuit of charger conducting DC contactor, and make the adhesive of DC contactor, the loop of conducting DC-DC converter and low tension battery, DC-DC converter is started working;
Charging module: battery is charged to low tension battery by DC-DC converter.
Particularly, processing module M4 comprises:
Charging contactor switching units: be used for disconnecting charging contactor, thus disconnect the charge circuit comprising battery and charger;
Cathode contact device switching units: be used for disconnecting cathode contact device, thus the loop that disconnection battery charges to low tension battery.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And thus the apparent change of extending out or variation be still among the protection range of the invention.
Claims (10)
1. cross a method of putting when preventing battery to charge, it is characterized in that comprising the following steps:
Obtain the initial voltage of battery described in charging start time;
Obtain the real-time voltage of battery described in charging process;
Described initial voltage and described real-time voltage are compared;
When described real-time voltage is less than or equal to described initial voltage, then cut off all loops of described battery.
2. the method for claim 1, is characterized in that, described in described acquisition charging process, the step of the real-time voltage of battery comprises: preset time period threshold value, obtains the real-time voltage from the charging moment of start time after this time period threshold value.
3. the method for claim 1, is characterized in that, described in described acquisition charging process, the step of the real-time voltage of battery comprises: arrange a sense cycle, periodically obtains the real-time voltage of battery described in charging process.
4. the method according to any one of claim 1-3, is characterized in that, also comprises before the step of the initial voltage of battery described in described acquisition charging start time:
After being connected with electrical network, charger is powered to battery management system, and described battery management system carries out self-inspection to the state of described battery;
Described battery management system controls closed cathode contact device, the negative pole making described battery respectively with
The connection of DC-DC converter, described charger;
Described battery management system anticathode contactor carries out self-inspection;
Described battery management system controls closed charging contactor, and described anode is connected with described charger, and battery enters charged state.
5. the method according to any one of claim 1-4, is characterized in that, also comprises before the initial voltage step of described acquisition charging start time battery:
The electromagnetic circuit of described charger conducting DC contactor, make the adhesive of DC contactor, the loop of conducting DC-DC converter and low tension battery, DC-DC converter is started working;
Described battery gives the charging of described low tension battery by described DC-DC converter.
6. the method according to any one of claim 1-5, is characterized in that, described then cut off the step in all loops of described battery when described real-time voltage is less than or equal to described initial voltage after further comprising the steps of:
Send charge fault prompting.
7. the method according to any one of claim 1-6, is characterized in that, the described step then cutting off all loops of battery when described real-time voltage is less than or equal to described initial voltage comprises:
Disconnect described charging contactor, in order to disconnect the charge circuit comprising described battery and described charger;
Disconnect described cathode contact device, in order to disconnect the loop that described battery charges to described low tension battery.
8. cross a system of putting when preventing battery to charge, it is characterized in that comprising:
Initial voltage acquisition module: be used for obtaining the initial voltage of battery described in charging start time;
Real-time voltage acquisition module: the real-time voltage being used for obtaining battery described in charging process;
Voltage comparison module: be used for described initial voltage and described real-time voltage to compare;
Processing module: when described real-time voltage is less than or equal to described initial voltage, is used for cutting off all loops of described battery.
9. system as claimed in claim 8, it is characterized in that, described real-time voltage acquisition module comprises:
Time period threshold preset unit: be used for a default time period threshold value, thus obtain the real-time voltage from the charging moment of start time after this time period threshold value; Or,
Sense cycle setting unit: be used for arranging a sense cycle, thus the real-time voltage periodically obtaining battery described in charging process.
10. system as claimed in claim 8 or 9, is characterized in that, also comprise:
Fault cues module: when described real-time voltage is less than or equal to described initial voltage, after cutting off all loops of described battery, is used for sending charge fault prompting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410802420.1A CN104852418B (en) | 2014-12-19 | 2014-12-19 | It is a kind of to prevent from crossing the method and system put when battery charges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410802420.1A CN104852418B (en) | 2014-12-19 | 2014-12-19 | It is a kind of to prevent from crossing the method and system put when battery charges |
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| CN104852418A true CN104852418A (en) | 2015-08-19 |
| CN104852418B CN104852418B (en) | 2017-12-08 |
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| WO2021189392A1 (en) * | 2020-03-27 | 2021-09-30 | 深圳市大疆创新科技有限公司 | Charging device, and charging control method and device |
| WO2022068593A1 (en) * | 2020-09-29 | 2022-04-07 | 比亚迪股份有限公司 | Charging control method and apparatus for hybrid electric vehicle, and vehicle |
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| Publication number | Publication date |
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| CN104852418B (en) | 2017-12-08 |
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Effective date of registration: 20180509 Address after: No. 188, Miyun District, Miyun District, Beijing, Beijing Patentee after: Beijing treasure Car Co.,Ltd. Address before: 102206, Beijing, Shahe Town, Changping District Road, sand Yang Patentee before: BEIQI FOTON MOTOR Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171208 Termination date: 20211219 |