The spare boosting power supply unit of electric car and system
Technical field
The present invention relates to electric vehicle engineering field more particularly to a kind of spare boosting power supply unit of electric car and it is
System.
Background technique
Currently, the battery system on electric car generally has high-tension battery group and A-battery group, high-tension battery group voltage
Usually there are several hectovolts, the common voltage of A-battery group has 12 volts and 24 volts.Power-equipment on electric car is mainly by high pressure
Battery-powered, instrument, amusement equipment etc. are mainly powered by A-battery group on vehicle.Wherein high-tension battery group is by multiple battery lists
Member is composed, while entire battery pack is managed by BMS, it may be said that high-tension battery group is a complicated system.Work as high pressure
When something goes wrong, entire high-tension battery group can all go out for electricity output for some battery unit failure or BMS operation in battery pack
Existing problem, then the power drive powered by high-tension battery group, steering driving, brake air pump etc. all can instantaneously stop working.This
When automobile will run out of steam, steering is unable to control, and brake can not operate normally.
Summary of the invention
In view of the deficiencies of the prior art, it is intended to when solving existing electric car mesohigh battery pack and breaking down, with it
The problem of power drive, steering driving, brake air pump of connection etc. all can instantaneously stop working, the present invention provides a kind of electronic vapour
The spare boosting power supply unit of vehicle and system can also make low-voltage battery group when the high-tension battery group of electric car breaks down
Certain important power-equipments after boosting to electric car provide short time power supply.
To achieve the above object, the present invention adopts the following technical scheme:
The spare boosting power supply unit of electric car, including A-battery group, adjustable booster circuit and rectification circuit;
The input terminal of adjustable booster circuit is connect with A-battery group, the output end of adjustable booster circuit and rectification circuit
Input terminal connection;
The low-voltage of A-battery group is transformed into high voltage by adjustable booster circuit, using defeated after rectifier circuit rectifies
Out.
Wherein, adjustable booster circuit includes transformer TR1, transformer TR2, switching device Q1, switching device Q2, derailing switch
Part Q3, switching device Q4, input capacitance C1, input capacitance C2 and resonant capacitance C3.
The first pin of the transformer TR1 primary side connects A-battery group cathode, the transformation by the switching device Q1
Device TR1 primary side third pin connects A-battery group cathode, the transformer TR1 primary side second pin by the switching device Q2
It is connect with the A-battery group anode, the transformer TR1 primary side second pin is also connected to by the input capacitance C1
The A-battery group cathode;
The first pin of the transformer TR2 primary side connects A-battery group cathode, the transformation by the switching device Q3
Device TR2 primary side third pin connects A-battery group cathode, the transformer TR2 primary side second pin by the switching device Q4
It is connect with the A-battery group anode, the transformer TR2 primary side second pin is also connected to by the input capacitance C2
The A-battery group cathode;
The transformer TR1 pair first is drawn when second pin is by the resonant capacitance C3 and the transformer TR2 pair
Foot connection.
The rectification circuit include rectifier diode D1, rectifier diode D2, rectifier diode D3, rectifier diode D4 with
And output capacitance C4.
The first pin of the transformer TR1 pair side respectively with the anode of the rectifier diode D1 and the rectifier diode
The connection of D3 cathode.
Transformer TR2 pair side second pin respectively with the anode of the rectifier diode D2 and the rectifier diode
The connection of D4 cathode.
One end of the output capacitance C4 is negative with the cathode of the rectifier diode D1 and the rectifier diode D2 respectively
The connection of pole.
The other end of the output capacitance C4 respectively with the anode of the rectifier diode D3 and the rectifier diode D4
The connection of anode.
Preferably, golden oxygen is respectively adopted in switching device Q1, switching device Q2, switching device Q3, switching device Q4
Half field effect transistor or insulated gate bipolar transistor.
Preferably, the voltage of A-battery group is 12 volts or 24 volts.
To achieve the above object, the present invention also uses following another technical solution:
A kind of spare boosting power supply system of electric car, including it is high-tension battery group, booster power module, switching module, dynamic
Power equipment, CAN bus and entire car controller.
The booster power module includes the spare boosting power supply unit of electric car of above-mentioned technical proposal.
The high-tension battery group and the booster power module are connected by the switching module and the power-equipment respectively
It connects.
The entire car controller is connected with the booster power module and the power-equipment respectively by the CAN bus
It connects.
Wherein, the power-equipment includes power-assisted steering drive system, brake air drive system of pump.
Switching module includes diode D5 and diode D6.
The spare boosting power supply unit of a kind of electric car set forth in the present invention, the beneficial effect is that: with the prior art
It compares, the spare boosting power supply unit of electric car of the invention uses adjustable booster circuit, and the low-voltage of A-battery group is turned
Become high voltage, gives next stage equipment using output after rectifier circuit rectifies, therefore when the high-tension battery group of electric car is sent out
When raw failure, then the steering driving powered by high-tension battery group, brake air pump etc. can all stop working, electronic vapour of the invention
The spare boosting power supply unit of vehicle can instantaneously replace high-tension battery group to provide high voltage to steering driving, brake air pump etc..
The spare boosting power supply system of a kind of electric car set forth in the present invention, the beneficial effect is that: with the prior art
It compares, the spare boosting power supply system of electric car of the invention passes through defeated to CAN bus communication and booster power module itself
The situation of change of electric current judges whether high-tension battery group is abnormal out: if high-tension battery group is no abnormal, by high-tension battery group
High voltage is provided to power-equipment through switching module;If high-tension battery group has exception, high pressure is disconnected by switching module
The connection of battery pack and power-equipment, and high voltage is provided to power-equipment by booster power module, it ensure that electric car is dynamic
The continual power supply of power equipment.
Detailed description of the invention
Fig. 1 is the structural block diagram of the spare boosting power supply unit of the electric car of the embodiment of the present invention.
Fig. 2 is the spare boosting power supply unit circuit diagram of the electric car of the embodiment of the present invention.
Fig. 3 is the structural block diagram of the spare boosting power supply system of the electric car of the embodiment of the present invention.
Fig. 4 is another structural block diagram of the spare boosting power supply system of the electric car of the embodiment of the present invention.
Description of symbols:
100, A-battery group;200, adjustable booster circuit;300, rectification circuit;400, high-tension battery group;500, it boosts
Power module;600, switching module;700, power-equipment;800, CAN bus;900, entire car controller.
Specific embodiment
The invention will be further described with specific embodiment with reference to the accompanying drawing.
It please refers to shown in Fig. 1, that show the tools of the spare boosting power supply unit preferred embodiment of electric car of the present invention
Body mount structure comprising A-battery group 100, adjustable booster circuit 200 and rectification circuit 300;
The input terminal of adjustable booster circuit 200 is connect with A-battery group 100, the output end of adjustable booster circuit 200 with
The input terminal of rectification circuit 300 connects;
The low-voltage of A-battery group 100 is transformed into high voltage by adjustable booster circuit 200, using rectification circuit 300
It is exported after rectification.
The spare boosting power supply unit of electric car in the embodiment of the present invention is used into adjustable booster circuit 200, by low pressure
The low-voltage of battery pack 100 is transformed into high voltage, and next stage equipment is given in output after rectifying using rectification circuit 300, therefore is worked as
When the high-tension battery group of electric car breaks down, then the steering driving powered by high-tension battery group, brake air pump etc. all can
Stop working, the spare boosting power supply unit of electric car of the invention can instantaneously replace high-tension battery group provide high voltage to turn
To driving, brake air pump etc..
Shown in referring to figure 2., which show the electricity of the preferred embodiment of the spare boosting power supply unit of electric car of the present invention
Lu Tu, wherein adjustable booster circuit 200 includes transformer TR1, transformer TR2, switching device Q1, switching device Q2, derailing switch
Part Q3, switching device Q4, input capacitance C1, input capacitance C2 and resonant capacitance C3.
The first pin of transformer TR1 primary side 11 passes through switching device Q1 connection A-battery group cathode, transformer TR1 primary side
Third pin 13 passes through switching device Q2 connection A-battery group cathode, transformer TR1 primary side second pin 12 and A-battery
Group BAT1 anode connection, it is negative that transformer TR1 primary side second pin 12 is also connected to A-battery group BAT1 by input capacitance C1
Pole.
The first pin of transformer TR2 primary side 21 passes through switching device Q3 connection A-battery group cathode, transformer TR2 primary side
Third pin 23 passes through switching device Q4 connection A-battery group cathode, transformer TR2 primary side second pin 22 and A-battery
Group BAT1 anode connection, it is negative that transformer TR1 primary side second pin 22 is also connected to A-battery group BAT1 by input capacitance C2
Pole.
Transformer TR1 pair while second pin 15 pass through resonant capacitance C3 and transformer TR2 pair while the first pin 24 connect,
Resonant capacitance C3 is placed among two transformers, its advantage is that being conducive to PCB layout, to reduce overall dimensions;Simultaneously
It also can be reduced loop area, reduce parasitic parameter, improve output characteristics.
Preferably, golden oxygen is respectively adopted in switching device Q1, switching device Q2, switching device Q3, switching device Q4
Half field effect transistor or insulated gate bipolar transistor.
Preferably, the voltage of A-battery group is 12 volts or 24 volts.
Rectification circuit 300 include rectifier diode D1, rectifier diode D2, rectifier diode D3, rectifier diode D4 with
And output capacitance C4.
The first pin of transformer TR1 pair side 14 respectively with rectifier diode D1 anode and rectifier diode D3 cathode company
It connects.
Transformer TR2 pair side second pin 25 respectively with rectifier diode D2 anode and rectifier diode D4 cathode company
It connects.
The connection with the cathode of rectifier diode D1 and rectifier diode D2 cathode respectively of one end of output capacitance C4.
The other end of output capacitance C4 respectively with rectifier diode D3 anode and rectifier diode D4 anode connection.
Rectification circuit 300 meets output capacitance C4, and output capacitance C4 plays output filter action.
Adjustable booster circuit 200 is in such a way that two groups of transformer secondary Voltage Series export, compared to only with one group of transformation
Device, its advantage is that the power of single transformer only has the half of total transformer efficiency, single switch device power demand is also corresponding
Halve, is conducive to parts selection design and heat dissipation design;Simultaneously as the single transformer turn ratio is also only compared to only with one group of change
The half of depressor, transformer primary side, secondary side to reduce transformer primary side leakage inductance, and then can be dropped around being made more compact
The spike of low switch device improves power-efficient.
Shown in referring to figure 3., that show the tools of the spare boosting power supply system preferred embodiment of electric car of the present invention
Body mount structure comprising high-tension battery group 400, booster power module 500, switching module 600, power-equipment 700, CAN bus
800 and entire car controller 900.
Booster power module 500 includes the spare boosting power supply unit of electric car of above-mentioned technical proposal.
High-tension battery group 400 and booster power module 500 are connected by switching module 600 and power-equipment 700 respectively.
Entire car controller 900 is connect with booster power module 500 and power-equipment 700 respectively by CAN bus 800.
The embodiment of the present invention illustrate a kind of spare boosting power supply system of electric car, the beneficial effect is that: with it is existing
Technology is compared, and the spare boosting power supply system of electric car of the invention passes through to the communication of CAN bus 800 and booster power module
The situation of change of itself output electric current judges whether high-tension battery group 400 is abnormal: if high-tension battery group 400 is no abnormal,
High voltage is provided to power-equipment 700 through switching module 600 by high-tension battery group 400;If there are different for high-tension battery group 400
Often, then the connection of high-tension battery group 400 and power-equipment 700 is disconnected by switching module 600, and by booster power module 500
High voltage is provided to power-equipment 700, ensure that the continual power supply of electric powered motor equipment 700.
In general, A-battery group 100 is relatively easy, and failure probability is smaller;And high-tension battery group 400 and low pressure
The probability of battery pack 100 while the failure that goes wrong is then smaller.In the spare booster system of the electric car of the embodiment of the present invention, when
When high-tension battery group 400 breaks down for electricity output, the low-voltage of A-battery group 100 can be passed through booster power module 500
It is converted into high voltage after boosting, short time power supply is provided to important power-equipments 700 certain on electric car, so that these are closed
Key member can run a period of time, then traffic safety can be greatly enhanced.
Wherein, power-equipment 700 includes power-assisted steering drive system, brake air drive system of pump.
Shown in referring to figure 4., that show the spare boosting power supply system another preferred embodiments of electric car of the present invention
Specific mount structure, wherein switching module 600 include diode D5 and diode D6.
The above is only present pre-ferred embodiments, is not intended to limit the scope of the present invention, therefore
Any subtle modifications, equivalent variations and modifications to the above embodiments according to the technical essence of the invention, still belong to
In the range of technical solution of the present invention.