CN103568854A - Electric car battery parallel-connection control system - Google Patents
Electric car battery parallel-connection control system Download PDFInfo
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- CN103568854A CN103568854A CN201210258800.4A CN201210258800A CN103568854A CN 103568854 A CN103568854 A CN 103568854A CN 201210258800 A CN201210258800 A CN 201210258800A CN 103568854 A CN103568854 A CN 103568854A
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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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Abstract
The invention provides an electric car battery parallel-connection control system which comprises a first battery module, a second battery module, a transmission control bus, a battery control unit, a car managing system and a switching control module, wherein the first battery module is provided with a first battery and a first battery managing system; the second battery module is provided with a second battery and a second battery managing system; the car managing system is connected with the first battery and the second battery; the switching control module comprises a switching unit connected with the first battery and the second battery. The electric car battery parallel control system can accurately monitor operation states of each of the batteries, effectively weed out specific batteries, reduce control cost, and isolate batteries which work abnormally with other batteries to avoid fire or explosion of the whole pack of batteries and improve safety of electric cars.
Description
Technical field
The present invention relates to a kind of battery of electric vehicle parallel control system, particularly relate to the battery of electric vehicle parallel control system that a kind of each battery all has independent battery management system.
Background technology
In recent years because global warming is day by day serious, environmental consciousness is come back, coordinate price of oil going up sky-high, national governments and enterprise are numerous and confused to be found new alternative energy or improves the conversion efficiency of secondary battery with the use of expectation minimizing fossil fuel, and then reduce the discharge of greenhouse gases, slow down the speed of global warming.Wherein conventional truck is mainly to use fossil fuel as power resources, not only consumes bulk petroleum resource, is also one of main chief culprit of greenhouse gas emission.Under the trend of global carbon reduction, many countries are all turned to vehicle electric one of important measures of carbon dioxide decrement, and then develop actively battery-driven car industry.
For example, yet this battery-driven car still has following problems in actual use: the development of battery-driven car is at present subject to the restriction of capacity of cell and has limited to its flying power, therefore needs the more batteries of parallel connection with capacity increasing, to extend travelled distance.But likely can not mate because of battery behavior when cell parallel, voltage measuring value is only the monomer battery voltage of maximum voltage in batteries in parallel connection, genuine property that cannot reaction monomers battery.Energy density, the parcel that discharges and recharges power and battery and use procedure the occurred high-tension current volt that bumps in addition, be all threaten safety of electric vehicle can key factor; In addition, along with the time discharges and recharges the increase of number of times, all battery nonuniformities will be obvious gradually along with the time, because power-supply management system is low to batteries in parallel connection group monomer characteristic particularity, and then cause certain single battery failure and cause scrapping of integral battery door, increase the expenditure of cost.
Therefore, be necessary to provide a kind of battery of electric vehicle parallel control system, to solve the existing problem of common technology.
Summary of the invention
Main purpose of the present invention is to provide a kind of battery of electric vehicle parallel control system, it utilizes a plurality of independently battery management systems (battery management system, BMS), with the serviceability of each battery of difference precise monitoring, effectively superseded particular battery, minimizing control system productive costs, even also can be by the battery of irregular operating and the isolation of other battery, avoid whole Battery pack on fire or blast, to promote the safety of battery-driven car.
Secondary objective of the present invention is to provide a kind of battery of electric vehicle parallel control system, it utilizes a plurality of independently battery management systems, because of the corresponding battery management system of each battery, processing data nearby not only, also dispersible installation, avoid the extra module making increasing, to reduce the degree of utilization of material cost room for promotion.
For reaching above-mentioned object, the invention provides a kind of battery of electric vehicle parallel control system, it comprises the first battery module, has the first battery and the first battery management system; The second battery module, has the second battery and the second battery management system; Transmission control bus; Battery control unit (battery control unit, BCU), connects described first and second battery management system by described transmission control bus; Vehicle management system (vehicle management system, VMS), connects respectively described first and second battery; And switching controls module, receive the information of described vehicle management system and control described first and second battery simultaneously, and comprise the switch unit that connects respectively described first and second battery.
In an embodiment of the present invention, described the first battery and the second battery are secondary battery, and are connected to charger, or are connected to separately charge independence device, and described charger is connected to described transmission control bus.
In an embodiment of the present invention, described vehicle management system has telltale.
In an embodiment of the present invention, described switch unit is controlled by tapered end change-over switch or main switch.
In an embodiment of the present invention, described switch unit is PS (Push Switch), change-over switch or liquid crystal shutter.
In an embodiment of the present invention, described switch unit is relay.
In an embodiment of the present invention, described system also comprises motor controller, and described motor controller is driven by described vehicle management system.
In addition, the present invention also provides a kind of battery of electric vehicle parallel control system, and it comprises: at least two battery modules, have independent battery management system separately; Transmission control bus; Battery control unit, connects each battery management system by described transmission control bus; Vehicle management system, connects respectively each battery; Switching controls module, receive the information of described vehicle management system and control described first and second battery simultaneously, and comprise switch unit, described switch unit connects respectively each battery and is responsible for switching action, with any battery of conducting, powers; And motor controller, described motor controller is driven by described vehicle management system.
In another embodiment of the present invention, described vehicle management system has telltale.
In another embodiment of the present invention, described switch unit is controlled by tapered end change-over switch or main switch.
About feature of the present invention and enforcement, by by do the detailed description of following most preferred embodiment with reference to accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the structural representation of the battery of electric vehicle parallel control system of first embodiment of the invention;
Fig. 2 a is the circuit diagram that the first battery module of first embodiment of the invention starts;
Fig. 2 b is the circuit diagram that the second battery module of first embodiment of the invention starts;
Fig. 3 is the structural representation of the battery of electric vehicle parallel control system of second embodiment of the invention.
[main element nomenclature]
11 first battery module 111 first batteries
112 first battery management system 12 second battery modules
121 second battery 122 second battery management systems
13 transmission control bus 14 battery control units
15 vehicle management system 16 switching controls modules
161 switch unit 17 power leads
18 motor controllers 19 start line
20 charger A contacts
B contact C is contact altogether
The specific embodiment
For above-mentioned and other object of the present invention, feature, advantage can be become apparent, below will be especially exemplified by preferred embodiment of the present invention, and coordinate accompanying drawing, be described in detail as follows.Moreover, the direction term that the present invention mentions, such as " on ", D score, 'fornt', 'back', " left side ", " right side ", " interior ", " outward " or " side " etc., be only the reference direction of accompanying drawing.Therefore, the direction term of use is in order to illustrate and to understand the present invention, and not in order to limit the present invention.
Please refer to shown in Fig. 1, the battery of electric vehicle parallel control system of first embodiment of the invention mainly comprises the first battery module 11, the second battery module 12, transmission control bus 13, battery control unit 14, vehicle management system 15 and switching controls module 16, and wherein this first battery module has the first battery 111 and the first battery management system 112; This second battery module 12 has the second battery 121 and the second battery management system 122; This battery control unit 14 connects this first and second battery management system 112,122 by this transmission control bus 13; This vehicle management system 15 connects respectively this first and second battery 111,121 by a plurality of power leads 17, and can CD-ROM drive motor controller 18; And this switching controls module 16 receives the information of this vehicle management system 15 and controls this first and second battery 111,121 simultaneously, and comprise switch unit 161, this switch unit 161 connects respectively this first and second battery 111,121 by starting line 19.This first and second battery management system 112,122 not only can each battery 111,121 of precise monitoring serviceability, also can coordinate charger 20 to charge to first and second battery 111,121, this battery management system disperses the design of installing can avoid the extra module making increasing, to reduce the degree of utilization of material cost room for promotion.
The present invention is by below utilizing Fig. 1 to Fig. 2 b to describe one by one detailed structure, assembled relation and the operation logic thereof of above-mentioned each element of the first embodiment in detail.
Shown in Fig. 1, first and second battery module 11,12 of the battery of electric vehicle parallel control system of first embodiment of the invention, its first and second battery 111,121 is secondary battery (secondary battery), claim again chargeable battery, for example can be lead-acid battery, nickel-cadmium cell, Ni-MH battery or lithium cell, but the present invention is not limited thereto.The both positive and negative polarity of this first and second battery 111,121 is electrically connected respectively this battery control unit 14 and this switching controls module 16 by power lead 17 separately.
In the present embodiment, this transmission control bus 13Wei (controller area network of controller local area network, CANbus), it is serial bus, be based upon in the broadcasting transmitting mechanism based on information guiding host-host protocol, utilize two-wire differential (two-wire differential) transmission technology that instant control is provided.This transmission control bus 13 is connected this first and second management system 112,122 and charger 20 thereof with this vehicle management system 15, to guarantee the transmission of message between each node.In addition, this transmission control bus 13 also can comprise the mechanism that error detection and preceence are differentiated.This transmission control bus 13 also can be RS-485 interface or internet, region (local interconnect network, LIN) or other and uses the interface of package or ascii character code swap data, but the present invention is not limited thereto.
Moreover, in the present embodiment, this first and second management system 112, 122 respectively in order to independent this first and second battery 111 of monitoring, 121 battery status, battery performance is abnormal, battery temperature, battery acid state, show battery state of charge (State of Charge, SOC), state of health (state of health, SOH) and the high temperature state such as warn, treat to detect respectively this first or second battery 111 of collection, after 121 message status data, by this transmission control bus 13, connecting this battery control unit 14 again processes and analyzes, wherein this battery control unit 14 is responsible for the heat abstractor operation of each battery module, and judge the voltage that battery is current, the variation such as temperature and capacity, again result is transferred to this vehicle management system 15.This vehicle management system 15 is called again electronic management system (electrical management system, EMS), and it is in order to send instruction, and with external world's transmission and accept message.In addition, when charging, battery-driven car need carry out communication with this vehicle management system 15, and the data of passing back according to this battery control unit 14 control, for example, control this battery control unit 14 and adjust discharging and recharging, drive this motor controller 18 and showing that battery status parameter is for the instant interpretation of steerman of batteries.
Shown in Fig. 2 a, the circuit diagram that the first battery module 11 of first embodiment of the invention starts, in the present embodiment, this switching controls module 16 comprises switch unit 161, this switch unit 161 is relay in the present embodiment, and this relay has three contact: A, B, C, and wherein C is for being total to contact (common), A and C are normally closed (normally close) contact, by this, start the mouth that line 19 connects this first battery 111; Now B and C are for often opening (normally open) contact, and this first battery 111 is to these vehicle management system 15 power supplies, and this second battery 121 is not powered.Wherein this switch unit 161 can be PS (Push Switch), change-over switch or liquid crystal shutter form, but the present invention is not limited thereto.
In the present embodiment, user can show according to electric weight, uses tapered end or main switch (not shown) to control this switch unit 161, to switch arbitrary battery.Now, this switch unit 161 (relay) will cut off another battery, in other words, and once once galvanic action.This switch unit 161 also can drive driving circuit (not shown) by this vehicle management system 15 by this first or second battery management system, 112,122 monitoring electric weight, stops power supply or carries out battery switching automatically determining.
When can being set in battery-driven car and stopping travelling, the action of this switching controls module 16 carries out; predeterminable is when this vehicle management system 15 is judged car speed as zero or zero voltage input; for the first or second battery 111,121 is carried out to safety management; under the state that is usually included in vehicle trouble or bumps, cut off the practices such as system power supply; as increase battery protecting circuit; make it possess the disconnecting function of cell or battery module; or on heat management, seeing through the cooling systems such as fan, the heating systems such as resistance to heat make battery in normal working temperature scope.At the high voltage protective of battery system, design especially, also must comprise active and passive type safe design, as: battery secondary insulation, insulation resistance detection, dangerous voltage disconnection automatically, manual voltage cut-out etc.
In the present embodiment, when this switch unit 161 (relay) also can be abnormal at the charge condition of battery, by this vehicle management system 15, assign instruction to this battery control unit 14, and then carry out and open circuit and leak electricity safety precaution action.Because electrokinetic cell interlock circuit is high-pressure system, maximum voltage can reach 600 volts, therefore for meeting safety precaution, several relays or safety device can be even installed.
Shown in Fig. 2 b, the circuit diagram that the second battery module 12 of first embodiment of the invention starts, when these the first battery 111 electric weight are not enough or occur other abnormal condition, changeable this switch unit 161, make normal opened contact B, C conducting, by this startup line 19, changed by the second battery and powered, its principle of work is identical with the first battery module 11 startups, in this, repeats no more.
In the present embodiment, this vehicle management system 15 also can comprise telltale, the message receiving from this battery management system by this battery control unit 14, when these the first or second battery 111,121 voltages or electric weight deficiency, this vehicle management system 15 can be exported corresponding light, image or aud. snl. by this telltale according to preset value, to remind user to carry out battery switching.
Please refer to Fig. 3, the structural representation of the battery of electric vehicle parallel control system of second embodiment of the invention, wherein configurable two, three, four of this battery of electric vehicle parallel control systems or above battery 111,121 ... and each battery 111,121 ... all is furnished with independent battery management system 112,122 ... when using the battery of electric vehicle parallel control system of second embodiment of the invention, in the same time, only has the battery of Yi Ge unit for power supply, and then realize the interleaved power of many Battery packs, to extend travelled distance.
Thus, serviceability that not only can each battery of precise monitoring, effectively eliminates particular battery, and can be by the battery of irregular operating and the isolation of other battery, avoids the on fire or blast of whole Battery pack, thereby the further safety of increase battery-driven car relatively.
As mentioned above, though can carry out batteries in parallel connection monitoring compared to conventional battery of electric vehicle parallel control system, but because each battery nonuniformity will be obvious gradually along with the time, and cause the accurately shortcoming of each battery status, the present invention passes through independently battery management system, and it can effectively carry out independent monitoring to each battery really, also dispersibles installation, avoid the extra module making increasing, to reduce the degree of utilization of material cost room for promotion.
Although the present invention is open with preferred embodiment; yet it is not intended to limiting the invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when making various changes and modification, so protection scope of the present invention should be as the criterion with the restriction of claims.
Claims (10)
1. a battery of electric vehicle parallel control system, comprising:
The first battery module, has the first battery and the first battery management system;
The second battery module, has the second battery and the second battery management system;
Transmission control bus;
Battery control unit, connects described first and second battery management system by described transmission control bus;
Vehicle management system, connects respectively described first and second battery; And
Switching controls module, receives the information of described vehicle management system and controls described first and second battery simultaneously, and comprise the switch unit that connects respectively described first and second battery.
2. battery of electric vehicle parallel control system according to claim 1, wherein said the first battery and the second battery are secondary battery, and are connected to charger, or are connected to separately charge independence device, described charger is connected to described transmission control bus.
3. battery of electric vehicle parallel control system according to claim 1, wherein said vehicle management system has telltale.
4. battery of electric vehicle parallel control system according to claim 1, wherein said switch unit is controlled by tapered end change-over switch or main switch.
5. battery of electric vehicle parallel control system according to claim 4, wherein said switch unit is PS (Push Switch), change-over switch or liquid crystal shutter.
6. according to the battery of electric vehicle parallel control system described in claim 1 or 4, wherein said switch unit is relay.
7. battery of electric vehicle parallel control system according to claim 1, wherein said system also comprises motor controller, described motor controller is driven by described vehicle management system.
8. a battery of electric vehicle parallel control system, comprising:
At least two battery modules, have independent battery management system separately;
Transmission control bus;
Battery control unit, connects each battery management system by described transmission control bus;
Vehicle management system, connects respectively each battery;
Switching controls module, receive the information of described vehicle management system and control described first and second battery simultaneously, and comprise switch unit, described switch unit connects respectively each battery and is responsible for switching action, with any battery of conducting, powers; And
Motor controller, described motor controller is driven by described vehicle management system.
9. battery of electric vehicle parallel control system according to claim 8, wherein said vehicle management system has telltale.
10. battery of electric vehicle parallel control system according to claim 8, wherein said switch unit is controlled by tapered end change-over switch or main switch.
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| CN201210258800.4A CN103568854A (en) | 2012-07-25 | 2012-07-25 | Electric car battery parallel-connection control system |
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| CN201210258800.4A CN103568854A (en) | 2012-07-25 | 2012-07-25 | Electric car battery parallel-connection control system |
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| CN104377758A (en) * | 2014-10-24 | 2015-02-25 | 北京凌云智能科技有限公司 | Battery switching method, battery management system and power device |
| CN106114267A (en) * | 2016-08-02 | 2016-11-16 | 威马中德汽车科技成都有限公司 | A kind of battery of electric vehicle bag switching control and method |
| CN108152748A (en) * | 2017-12-14 | 2018-06-12 | 株洲广锐电气科技有限公司 | Ice storing time system and its detection method |
| CN114039402A (en) * | 2021-08-31 | 2022-02-11 | 百发动力（无锡）有限公司 | Battery pack switching control system, battery pack switching control method, and readable storage medium |
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Application publication date: 20140212 |