CN104037842A - Soft power outage battery management system used for electric vehicles - Google Patents
Soft power outage battery management system used for electric vehicles Download PDFInfo
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- CN104037842A CN104037842A CN201410212033.2A CN201410212033A CN104037842A CN 104037842 A CN104037842 A CN 104037842A CN 201410212033 A CN201410212033 A CN 201410212033A CN 104037842 A CN104037842 A CN 104037842A
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- bms
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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
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a soft power outage battery management system used for electric vehicles. The soft power outage battery management system includes a BMS (battery management system) controller 3 which is used for judging whether to perform charging and discharging control and system power outage management, a BMS charging and discharging triggering signal 4 which is used for triggering the BMS controller 3, and a power source on-off control module 1 which is used for controlling the switch-on or switch-off of power source input of the BMS the controller 3; in charging, the BMS charging and discharging triggering signal 4 can trigger the BMS controller 3 before the power outage of the system; and in discharging, the BMS controller 3 can realize time-delay control on the power outage of the BMS controller 3 itself through controlling the power source on-off control module 1. With the soft power outage battery management system used for the electric vehicles of the invention adopted, soft power outage of a BMS for the electric vehicles can be realized, and therefore, functions such as relay shutdown, power outage instruction transmission and real-time updated key parameter storage can be realized before the power outage of the BMS for the electric vehicles, and protection and management of the BMS for the electric vehicles and finished automobile systems can be better realized.
Description
Technical field
The present invention relates to the soft lower electric battery management system of a kind of electric vehicle, belong to electronic technology field.
Background technology
Electric motor car is the important development direction of current new energy technology, battery management system (Battery Management System, hereinafter be called for short BMS) be the intelligent maincenter of its core component power battery pack, be the bridge that other electrical system of battery pack and electric motor car is linked up.BMS, after powering on, can realize detection and the judgement to battery and oneself state in 500 ms, works normally and system communication, but in the time of lower electricity, system power supply can directly disconnect, BMS cannot carry out the normal lower electricity of corresponding state (as the relay of BMS control) is prepared, cannot inform in advance its power-down state of other controller, also cannot be to the key parameter of self various variation in inside (as SOC value, residual capacity value etc.) effectively store, if and these continually varying parameters adopt the methods such as real-time storage, can have a strong impact on EEPROM(EEPROM (Electrically Erasable Programmable Read Only Memo)) life-span, as the battery of 100 AH, every 0.1 AH preserves once, 2000 charging and discharging circulations need to preserve 4,000,000 times, exceed greatly self erasing and writing life 100,000 times of EEPROM.Therefore, the soft lower electric tube reason that realizes BMS is extremely important, and this problem be there is no to the effective solution of system at present.
Summary of the invention
For the soft lower electric tube reason problem that realizes BMS in prior art without system effective method, the present invention proposes the soft lower electric BMS of a kind of electric vehicle, triggering signal can effectively utilize current electric motor car to discharge and recharge time, realize the soft control to electricity under electric vehicle BMS, have implementation method succinct, apply feature easily.
For addressing the above problem, the technical solution used in the present invention is as follows:
The soft lower electric BMS of a kind of electric vehicle, comprising: BMS controller, the system cut-off management when controlling and discharge for judging whether to discharge and recharge; BMS discharges and recharges triggering signal, for triggering described BMS controller; On/off control module, for controlling conducting or the cut-out of described BMS controller power source input;
Described in when charging, BMS discharges and recharges triggering signal and before system cut-off, can trigger described BMS controller; Described in when electric discharge, BMS controller, by controlling described on/off control module, is realized the lower electric time delay control of described BMS controller self.
As the improvement of technique scheme, it is the electric vehicle BMS charging and discharging state judgement triggering signal that can carry out multiplexing functions that described BMS discharges and recharges triggering signal.Described electric vehicle BMS charging and discharging state judges by triggering signal and comprises that the charging of the use of charging connects the ON position switch signal that confirmation signal and car load are used, by on/off control module described in its multiplexing functions control, can in the situation that not increasing outside other input, realize the soft lower electric tube reason of electric vehicle BMS.
As the improvement of technique scheme, described BMS discharges and recharges triggering signal also for controlling described on/off control module, and described BMS controller can normally be powered in soft lower electricity.Disconnect after power supply in on/off control module described in the control of described BMS controller, the soft lower electric BMS of described electric vehicle also can discharge and recharge the triggering signal operation that normally powers on by described.
As the improvement of technique scheme, the soft lower electric BMS of described electric vehicle also comprises: multiple power supplies input isolation circuit; Described BMS controller power supply is inputted together by multiple power supplies such as charge power supply input, discharge power supply inputs, prevents by described multiple power supplies buffer circuit the current flowing backwards that described multiple power supplies is mutual.Because multiple power supplies exists voltage difference each other, the situation that therefore easily generation current is instead filled with, can effectively avoid the generation of above-mentioned situation by described multiple power supplies input isolation circuit is set.
Compared with prior art, implementation result of the present invention is as follows in the present invention:
The soft lower electric BMS of a kind of electric vehicle of the present invention, by effective monitoring and control to electric process state under electric vehicle BMS in batteries charging process, discharge process, can realize preferably the soft lower electricity of described BMS controller, the functions such as the key parameter of electric instruction under described BMS controller can being completed before lower electricity and turn-off relay, sending, preservation real-time update, complete protection and management to electric vehicle BMS and Full Vehicle System preferably; And the soft lower electric BMS of described electric vehicle adopts described BMS controller and described BMS to discharge and recharge the structure of on/off control module described in triggering signal co-controlling, can effectively realize electricity under the time delay of the soft lower electric BMS of described electric vehicle; In addition, the soft lower electric BMS of described electric vehicle has effectively utilized electric vehicle BMS charging and discharging state judgement triggering signal, can make system more succinct, makes the lower electric current journey of the soft lower electric BMS of described electric vehicle more reasonable.
Brief description of the drawings
Fig. 1 is the schematic block diagram of the soft lower electric BMS of electric vehicle of the present invention;
Fig. 2 is the charging schematic block circuit diagram of the soft lower electric BMS specific embodiment of electric vehicle of the present invention;
Fig. 3 is the electric discharge power supply circuits schematic block diagram of the soft lower electric BMS specific embodiment of electric vehicle of the present invention.
Embodiment
Content of the present invention is described below in conjunction with specific embodiments.
As shown in Figure 1, the soft lower electric BMS of electric vehicle of the present invention comprises: on/off control module 1, for controlling conducting or the cut-out of the soft lower electric BMS power supply input of described electric vehicle; , for the input of buffer circuit power supply, while preventing that the multiple power supplies such as charge power supply input, discharge power supply input from inputting the soft lower electric BMS of described electric vehicle together, there is each other current flowing backwards in multiple power supplies input isolation circuit 2; BMS controller 3, need discharge and recharge control for judging whether, and for control described on/off control module 1 in the time discharging, disconnects the current supply circuit of described BMS controller 3; BMS discharges and recharges triggering signal 4, triggers described BMS controller 3 and in the time discharging and recharging, carries out work, and before charging power-off, trigger described BMS controller 3 and carry out soft lower electric operation; And described BMS discharges and recharges triggering signal 4 also can control described on/off control module 1, disconnect after power supply thereby make described BMS controller 3 control described on/off control module 1, the soft lower electric BMS of described electric vehicle also can discharge and recharge triggering signal 4 operation that normally powers on by described.
Particularly, described BMS discharges and recharges triggering signal 4 for electric vehicle BMS charging and discharging state judgement triggering signal, comprise the charging connection confirmation signal of the use of charging and the ON position switch signal that car load is used, by on/off control module 1 described in its multiplexing functions control, can be in the soft lower electric tube reason that does not need to realize under outside other input condition electric vehicle BMS.
The concrete Application Example of the soft lower electric BMS of above-mentioned electric vehicle is as shown in Figures 2 and 3:
As shown in Figures 2 and 3, in charging and discharging circuit, at the positive pole of the power supply input of described BMS controller connect respectively a diode D11 and D21, channeling power supply input isolation circuit, while avoiding charging to be connected with electric discharge power supply simultaneously, the difference existing due to its voltage causes mutual generation current to recharge, and damages power supply or BMS controller.
As shown in Figure 2, in the soft lower electric BMS charging of electric vehicle loop, making full use of between charger and BMS controller original charging is connected confirmation signal and discharges and recharges triggering signal as described BMS, this signal is made up of R11 and R12, after charging plug is normally connected with battery pack socket, signal is effective, and can be detected by BMS controller, thereby triggering BMS controller carries out the charging of preset frequency judges operation, to judge whether to stop or continue charging, in addition, BMS discharges and recharges triggering signal and also comprises the snap close button S11 that is positioned at the control loop switch on charging plug (being equivalent to on/off control module of the present invention), extract before charging plug, snap close button S11 can disconnect this signal circuit, and corresponding state variation detected by BMS controller, BMS can and disconnect (being that charging plug departs from charge power supply completely) at charging after snap close button S11 presses and carry out before corresponding power operation (shutoff relay, send lower electric instruction, preserve the key parameter of real-time update etc.), realize the soft lower electricity of BMS.
As shown in Figure 3, in the soft lower electric BMS electric discharge current supply circuit of electric vehicle, utilize the ON gear signal of Full Vehicle System to discharge and recharge triggering signal as described BMS, this signal its starting state after R21 rheostat dividing potential drop can be detected in real time by BMS controller, thereby triggering BMS controller carries out the electric discharge of preset frequency judges operation, to judge whether to stop or continue electric discharge; In this loop, the power supply of BMS controller is equivalent to on/off control module of the present invention through switch S 22() control, switch S 22 is by ON gear signal and the dual control of BMS controller, when ON keeps off signal at stop and triggers after BMS controller, BMS controller can carry out delay cut-off by control switch S22, can adjust according to demand the power cut off delay time, make BMS controller can complete turn-off relay, send under electric instruction, realize soft lower electricity after preserving the operation such as key parameter of real-time update; Simultaneously ON gear signal is also being controlled switch S 22, and to guarantee in the time that needs BMS controls work, Closing Switch S22, makes BMS controller can normally power in lower soft, thereby keep power supply; Above-mentioned dual control is through unidirectional isolating diode D22 and D23, and the inconsistent electric current causing of voltage recharges when avoiding co-controlling.
Apparently, the cited situation of Fig. 2 and Fig. 3 is only a concrete Application Example, in the time that charging and discharging input signal is different from Fig. 2 and Fig. 3, can select other corresponding control mode, to meet member composition and the control relation of the soft lower electric BMS of electric vehicle of the present invention, thereby realize the detection of described BMS controller 3 to power-off signal and the soft control of lower electricity.
In sum, the soft lower electric BMS of electric vehicle of the present invention takes full advantage of the triggering signal in electric motor car charging and discharging process, by described on/off control module 1 realize described BMS controller 3 from time delay control, thereby make electric vehicle BMS realize the soft lower electric tube reason before power-off; The soft lower electric BMS of electric vehicle of the present invention can effectively realize electric vehicle BMS and finish and soft lower electric control when electric discharge finishes in charging, reach electric current journey under electric vehicle BMS soft control, realize the protection to EEPROM when the lower telecommunications breath of other controller is sent and key parameter is preserved.
Above content is detailed description made for the present invention in conjunction with specific embodiments, can not assert that the concrete enforcement of the present invention only limits to these explanations.For those skilled in the art, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to the scope of protection of the invention.
Claims (4)
1. the soft lower electric BMS of electric vehicle, is characterized in that, comprising: BMS controller (3), the system cut-off management when controlling and discharge for judging whether to discharge and recharge; BMS discharges and recharges triggering signal (4), for triggering described BMS controller (3); On/off control module (1), for controlling conducting or the cut-out of the input of described BMS controller (3) power supply;
Described in when charging, BMS discharges and recharges triggering signal (4) and before system cut-off, can trigger described BMS controller (3); Described in when electric discharge, BMS controller (3), by controlling described on/off control module (1), is realized the lower electric time delay control of described BMS controller (3) self.
2. the soft lower electric BMS of a kind of electric vehicle as claimed in claim 1, is characterized in that, described BMS discharges and recharges triggering signal (4) for carrying out the electric vehicle BMS charging and discharging state judgement triggering signal of multiplexing functions.
3. the soft lower electric BMS of a kind of electric vehicle as claimed in claim 1, is characterized in that, described BMS discharges and recharges triggering signal (4) also for controlling described on/off control module (1), and described BMS controller (3) can normally be powered in soft lower electricity.
4. the soft lower electric BMS of a kind of electric vehicle as claimed in claim 1, is characterized in that, also comprises: multiple power supplies input isolation circuit (2); Described BMS controller (3) power supply is inputted together by multiple power supplies such as charge power supply input, discharge power supply inputs, prevents by described multiple power supplies buffer circuit (2) current flowing backwards that described multiple power supplies is mutual.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410212033.2A CN104037842A (en) | 2014-05-20 | 2014-05-20 | Soft power outage battery management system used for electric vehicles |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410212033.2A CN104037842A (en) | 2014-05-20 | 2014-05-20 | Soft power outage battery management system used for electric vehicles |
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| CN104037842A true CN104037842A (en) | 2014-09-10 |
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| CN201410212033.2A Pending CN104037842A (en) | 2014-05-20 | 2014-05-20 | Soft power outage battery management system used for electric vehicles |
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Cited By (5)
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| CN104578262A (en) * | 2014-12-22 | 2015-04-29 | 惠州市亿能电子有限公司 | Power supply circuit for automatic delay power delivery of BMS |
| CN106882072A (en) * | 2017-03-23 | 2017-06-23 | 北京新能源汽车股份有限公司 | The control method and control device of electric protection under a kind of fuel cell system |
| EP3187359A1 (en) * | 2015-12-30 | 2017-07-05 | Thunder Power New Energy Vehicle Development Company Limited | Battery management system |
| CN113199961A (en) * | 2021-06-07 | 2021-08-03 | 东风汽车股份有限公司 | Delayed power-off method for battery management system of electric vehicle |
| CN114312630A (en) * | 2021-12-23 | 2022-04-12 | 东风越野车有限公司 | Controller power supply system with high reliability and zero power consumption, method and storage medium |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578262A (en) * | 2014-12-22 | 2015-04-29 | 惠州市亿能电子有限公司 | Power supply circuit for automatic delay power delivery of BMS |
| EP3187359A1 (en) * | 2015-12-30 | 2017-07-05 | Thunder Power New Energy Vehicle Development Company Limited | Battery management system |
| CN107042766A (en) * | 2015-12-30 | 2017-08-15 | 昶洧新能源汽车发展有限公司 | Battery management system |
| US9931956B2 (en) | 2015-12-30 | 2018-04-03 | Thunder Power New Energy Vehicle Development Company Limited | Battery management system |
| CN106882072A (en) * | 2017-03-23 | 2017-06-23 | 北京新能源汽车股份有限公司 | The control method and control device of electric protection under a kind of fuel cell system |
| CN106882072B (en) * | 2017-03-23 | 2019-07-19 | 北京新能源汽车股份有限公司 | The control method and control device of electric protection under a kind of fuel cell system |
| CN113199961A (en) * | 2021-06-07 | 2021-08-03 | 东风汽车股份有限公司 | Delayed power-off method for battery management system of electric vehicle |
| CN114312630A (en) * | 2021-12-23 | 2022-04-12 | 东风越野车有限公司 | Controller power supply system with high reliability and zero power consumption, method and storage medium |
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