CN105730259B - The electrokinetic cell system of electric vehicle and electric vehicle with it - Google Patents

The electrokinetic cell system of electric vehicle and electric vehicle with it Download PDF

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Publication number
CN105730259B
CN105730259B CN201410758989.2A CN201410758989A CN105730259B CN 105730259 B CN105730259 B CN 105730259B CN 201410758989 A CN201410758989 A CN 201410758989A CN 105730259 B CN105730259 B CN 105730259B
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China
Prior art keywords
electric vehicle
switch
direct current
converter
control module
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CN105730259A (en
Inventor
马爱丽
刘彦初
潘福中
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BYD Co Ltd
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BYD Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/72Electric energy management in electromobility

Abstract

The invention discloses a kind of electrokinetic cell systems of electric vehicle, including:Power battery, power battery have the first positive terminal, the second positive terminal and negative pole end;First DC DC converters, first DC DC converters are connected with the first positive terminal, first DC DC converters are for converting to export the second direct current the first direct current that power battery exports, wherein, the voltage of second direct current is less than the voltage of the first direct current, and startup power supply of second direct current as electric vehicle;First switch;Control module, control module are connected by first switch with the first DC DC converters, wherein when first switch is closed, startup power supply is powered to control module, so that control module control electric vehicle starts.The electrokinetic cell system, as startup power supply, not only simplifies system design, reduces cost, moreover it is possible to ensure that electric vehicle normally starts at low temperature without low tension battery.The invention also discloses a kind of electric vehicles.

Description

The electrokinetic cell system of electric vehicle and electric vehicle with it
Technical field
The present invention relates to technical field of new energy, more particularly to the electrokinetic cell system and one of a kind of electric vehicle Electric vehicle of the kind with the electrokinetic cell system.
Background technology
Existing new-energy automobile includes pure EV (Electric Vehicle, pure electric automobile), HEV (Hybrid Electric Vehicle, hybrid vehicle), PHEV (Plug-in Hybrid Electric Vehicle, it is plug-in mixed Close power vehicle) etc..The electrokinetic cell system of these automobiles includes the high voltage power battery being used to provide power and is used as Startup power supply and the 12V accumulators powered to low-voltage load, or even some also include accessory power supply, to ensure providing automobile just Often work and operation.
But the design comparison of the electrokinetic cell system of these automobiles is complicated, and circuit is generally also located in automobile parking In connected state, quiescent dissipation is larger, is easy the situation for automobile starting difficulty occur in cold winter.In addition, the power battery In system, need 12V accumulators as startup power supply, it is not only of high cost, but also need space big, to setting for electrokinetic cell system Meter brings difficulty, in addition traditional storage battery restricted lifetime, and frequently replacing accumulator can also make cost increase.
Invention content
The present invention is directed to solve one of the technical problem in above-mentioned technology at least to a certain extent.
For this purpose, an object of the present invention is to provide a kind of electrokinetic cell system of electric vehicle, it is not necessarily to low pressure electric power storage Pond not only simplifies system design, reduces cost, moreover it is possible to ensure that electric vehicle normally opens at low temperature as startup power supply It is dynamic.
It is another object of the present invention to propose a kind of electric vehicle.
In order to achieve the above objectives, a kind of electrokinetic cell system for electric vehicle that one aspect of the present invention embodiment proposes, packet It includes:Power battery, the power battery have the first positive terminal, the second positive terminal and negative pole end;First DC-DC converter, institute It states the first DC-DC converter with first positive terminal to be connected, first DC-DC converter is for defeated to the power battery The first direct current gone out is converted to export the second direct current, wherein the voltage of second direct current is less than described first The voltage of direct current, and startup power supply of second direct current as the electric vehicle;First switch;Control module, institute It states control module by the first switch to be connected with first DC-DC converter, wherein when the first switch is closed When, the startup power supply is powered to the control module, so that the control module controls the electric vehicle and starts.
The electrokinetic cell system of electric vehicle according to the ... of the embodiment of the present invention, by the first DC-DC converter to power electric First direct current of pond output is converted to export the second direct current, as the startup power supply of electric vehicle, to eliminate Startup power supply on traditional electric vehicle not only simplifies system design, reduces i.e. without low tension battery as startup power supply Cost, additionally due to the energy of power battery height, by the power of the exportable bigger of the first DC-DC converter, to All exportable enough power starts electric vehicle under the equal ultralow temperature of even -30 DEG C of low temperature, ensures electric vehicle at low temperature It is normal to start.
According to one embodiment of present invention, the electrokinetic cell system of the electric vehicle further includes:Second switch, The second switch is closed or disconnects under the control of the control module;Second DC-DC converter, the 2nd DC-DC turn Parallel operation is connected by the second switch with second positive terminal, wherein when the second switch is closed, described second The third direct current that DC-DC converter is used to export the power battery is converted with the dynamical system to the electric vehicle System power supply.
According to one embodiment of present invention, the first switch is related to the initiation key system of the electric vehicle Connection, wherein when the initiation key system receives the enabling signal of the electric vehicle, the first switch is closed.
According to one embodiment of present invention, when the electric vehicle is hybrid vehicle, the control module is also It is connected with the starter motor in the hybrid vehicle, wherein when the control module is when receiving HEV enabling signals, institute It states the control module control power battery to power to the starter motor by first DC-DC converter, so that described open Motivation drags the engine start in the hybrid vehicle.
According to one embodiment of present invention, when the control module receives EV enabling signals, the control module It controls the second switch to be closed, so that the power battery is supplied by second DC-DC converter to the dynamical system Electricity.
According to one embodiment of present invention, the second direct current of the first DC-DC converter output is additionally operable to institute State the low-voltage load power supply on electric vehicle.
Specifically, according to an example of the present invention, the voltage of second direct current can be 12V.
In order to achieve the above objectives, another aspect of the present invention embodiment proposes a kind of electric vehicle comprising above-mentioned electricity The electrokinetic cell system of electrical automobile.
Electric vehicle according to the ... of the embodiment of the present invention eliminates the startup power supply on traditional electric vehicle and is not necessarily to low pressure storage Battery not only simplifies electrokinetic cell system design, cost is reduced, additionally due to the energy of power battery as startup power supply Amount is high, by the power of the exportable bigger of the first DC-DC converter, thus all can be defeated under even -30 DEG C equal ultralow temperature of low temperature Go out enough power to realize that electric vehicle starts, fully meets the needs of user.
Wherein, the electric vehicle can be pure electric automobile or hybrid vehicle.
Description of the drawings
Fig. 1 is the block diagram according to the electrokinetic cell system of the electric vehicle of the embodiment of the present invention.
Specific implementation mode
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, it is intended to for explaining the present invention, and is not considered as limiting the invention.
With reference to the accompanying drawings come describe electric vehicle according to the ... of the embodiment of the present invention electrokinetic cell system and with should The electric vehicle of electrokinetic cell system.
Fig. 1 is the block diagram according to the electrokinetic cell system of the electric vehicle of the embodiment of the present invention.As shown in Figure 1, The electrokinetic cell system of the electric vehicle includes:Power battery 10, the first DC-DC converter 20, first switch K1 and control mould Block 30.
As shown in Figure 1, power battery 10 has the first positive terminal 101, the second positive terminal 102 and negative pole end 103.First DC-DC converter 20 is connected with the first positive terminal 101, the first DC-DC converter 20 be used for power battery 10 is exported first Direct current is converted to export the second direct current, wherein the voltage of second direct current is less than first direct current Voltage, and startup power supply of second direct current as the electric vehicle.Control module 30 passes through first switch K1 and One DC-DC converter 20 is connected, wherein when first switch K1 is closed, the startup power supply i.e. the first DC-DC converter 20 is defeated The second direct current gone out supplies electricity to the power supply of control module 30, so that control module 30 controls the electric vehicle and starts.
According to one embodiment of present invention, as shown in Figure 1, the electrokinetic cell system of above-mentioned electric vehicle further includes: Second switch K2 and the second DC-DC converter 40.Second switch K2 is closed or disconnects, second under the control of control module 30 DC-DC converter 40 is connected by second switch K2 with the second positive terminal 102, wherein when second switch K2 is closed, second The third direct current that DC-DC converter 40 is used to export the power battery is converted with the dynamical system to electric vehicle 50 power supplies.
Also, the second direct current of the first DC-DC converter 20 output is additionally operable to negative to the low pressure on the electric vehicle Carry 60 power supplies.
Specifically, 10 inside of power battery can contain there are three pole, one is cathode, and two are anode.Wherein, one Anode is connected with the first DC-DC converter 20, and control module 30 and low-voltage load 60 are given respectively by the first DC-DC converter 20 Power supply, another anode is connected by second switch K2 with the second DC-DC converter 40, when second switch is closed, by the Two DC-DC converters 40 are powered for dynamical system 50.
Wherein, first switch K1 is associated with the initiation key system of electric vehicle, also, works as the initiation key system When receiving the enabling signal of the electric vehicle, first switch K1 is closed, and control module 30 receives sparking signal.Namely It says, first switch K1 can be associated with the ignition switch on electric vehicle, and ignition switch is got to ON by car key in user When shelves, first switch K1 is closed.
According to one embodiment of present invention, when the electric vehicle be hybrid vehicle when, control module 30 also with Starter motor 70 in the hybrid vehicle is connected, wherein when control module 30 is receiving HEV (hybrid power) startup letters Number when, control module 30 control power battery 10 by the first DC-DC converter 20 to starter motor 70 power supply so that starter motor 70 Drag the engine start in the hybrid vehicle.In other words, control module 30 when receiving HEV enabling signals according to opening The demand of motivation 70, the first DC-DC converter 20 of control are powered to starter motor 70, drag engine, realize sparking.
Also, since the energy of power battery 10 is higher, power battery 10 gives starter motor by the first DC-DC converter 20 When 70 power supply, the power of exportable bigger can more effectively improve the sparking performance of electric vehicle, be waited under ultralow temperature at -30 DEG C Also it can realize that electric vehicle starts, ensure that electric vehicle can normally start at low ambient temperatures.
According to another embodiment of the invention, when control module 30 receives EV (pure electric vehicle) enabling signal, control Module 30 controls second switch K2 and is closed, so that power battery 10 is powered by the second DC-DC converter 40 to dynamical system 50, To start electric vehicle.
Therefore it says, in an embodiment of the present invention, only by a DC-DC converter, so that it may instead of startup power supply, from And the low tension battery on traditional electric vehicle is eliminated, can directly be to start by the first DC-DC converter and control module Machine is powered, and is simplified system design, is reduced cost.
In the example of the present invention, the voltage of second direct current is 12V.
The electrokinetic cell system of electric vehicle according to the ... of the embodiment of the present invention, by the first DC-DC converter to power electric First direct current of pond output is converted to export the second direct current, as the startup power supply of electric vehicle, to eliminate Startup power supply on traditional electric vehicle not only simplifies system design, reduces i.e. without low tension battery as startup power supply Cost, additionally due to the energy of power battery height, by the power of the exportable bigger of the first DC-DC converter, to All exportable enough power starts electric vehicle under the equal ultralow temperature of even -30 DEG C of low temperature, ensures electric vehicle at low temperature It is normal to start.
In addition, the embodiment of the present invention also proposed a kind of electric vehicle comprising the power electric of above-mentioned electric vehicle Cell system.
Wherein, the electric vehicle can be pure electric automobile or hybrid vehicle.
Electric vehicle according to the ... of the embodiment of the present invention eliminates the startup power supply on traditional electric vehicle and is not necessarily to low pressure storage Battery not only simplifies electrokinetic cell system design, cost is reduced, additionally due to the energy of power battery as startup power supply Amount is high, by the power of the exportable bigger of the first DC-DC converter, thus all can be defeated under even -30 DEG C equal ultralow temperature of low temperature Go out enough power to realize that electric vehicle starts, fully meets the needs of user.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more this feature.In the description of the present invention, the meaning of " plurality " is two or more, Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc. Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral;Can be that machinery connects It connects, can also be electrical connection;It can be directly connected, can also can be indirectly connected through an intermediary in two elements The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
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 It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned Embodiment is changed, changes, replacing and modification.

Claims (9)

1. a kind of electrokinetic cell system of electric vehicle, including power battery, the first DC-DC converter and control module, described First DC-DC converter is used to convert to export the second direct current the first direct current that the power battery exports, It is characterized in that, the electrokinetic cell system further includes first switch, wherein the power battery has the first positive terminal, second Positive terminal and negative pole end, first DC-DC converter are connected with first positive terminal, and the voltage of second direct current is small In the voltage of first direct current, and startup power supply of second direct current as the electric vehicle, the control mould Block is connected by the first switch with first DC-DC converter, wherein described to open when the first switch is closed Dynamic power supply is powered to the control module, so that the control module controls the electric vehicle and starts.
2. the electrokinetic cell system of electric vehicle according to claim 1, which is characterized in that further include:
Second switch, the second switch are closed or disconnect under the control of the control module;
Second DC-DC converter, second DC-DC converter are connected by the second switch with second positive terminal, Wherein, when the second switch is closed, third direct current of second DC-DC converter for being exported to the power battery Electricity is converted to power to the dynamical system of the electric vehicle.
3. the electrokinetic cell system of electric vehicle according to claim 1 or 2, which is characterized in that the first switch with The initiation key system of the electric vehicle is associated, wherein when the initiation key system receives the electric vehicle When enabling signal, the first switch is closed.
4. the electrokinetic cell system of electric vehicle according to claim 3, which is characterized in that when the electric vehicle is mixed When closing power vehicle, the control module is also connected with the starter motor in the hybrid vehicle, wherein when the control mould When receiving hybrid power HEV enabling signals, the control module controls the power battery and passes through the first DC-DC block Converter is powered to the starter motor, so that the starter motor drags the engine start in the hybrid vehicle.
5. the electrokinetic cell system of electric vehicle according to claim 2, which is characterized in that when the control module receives When to pure electric vehicle EV enabling signals, the control module controls the second switch and is closed, so that the power battery passes through institute The second DC-DC converter is stated to power to the dynamical system.
6. the electrokinetic cell system of electric vehicle according to claim 1, which is characterized in that the first DC-DC conversions Second direct current of device output is additionally operable to the low-voltage load power supply on the electric vehicle.
7. the electrokinetic cell system of electric vehicle according to claim 1, which is characterized in that the electricity of second direct current Pressure is 12V.
8. a kind of electric vehicle, which is characterized in that include the power of the electric vehicle according to any one of claim 1-7 Battery system.
9. electric vehicle according to claim 8, which is characterized in that the electric vehicle is that pure electric automobile or mixing are dynamic Power automobile.
CN201410758989.2A 2014-12-10 2014-12-10 The electrokinetic cell system of electric vehicle and electric vehicle with it Active CN105730259B (en)

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