CN208198121U - Integrated hybrid energy source interface circuit topological structure for electric automobile - Google Patents
Integrated hybrid energy source interface circuit topological structure for electric automobile Download PDFInfo
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- CN208198121U CN208198121U CN201820696236.7U CN201820696236U CN208198121U CN 208198121 U CN208198121 U CN 208198121U CN 201820696236 U CN201820696236 U CN 201820696236U CN 208198121 U CN208198121 U CN 208198121U
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- interface circuit
- power battery
- battery unit
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- super capacitor
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- 230000005611 electricity Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 230000010354 integration Effects 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 6
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- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
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- 230000000295 complement effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
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- 239000003921 oil Substances 0.000 description 2
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- 238000004064 recycling Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The utility model discloses an integration hybrid energy source interface circuit topological structure for electric automobile, including the two-way DC-DC interface circuit one of connecting power battery unit and direct current bus, the power battery unit that comprises inductance element and switch network and the two-way DC-DC interface circuit three of connecting super capacitor unit and direct current bus between the super capacitor unit and the interface circuit two. The utility model discloses a topological structure is different from mixed energy source interface circuit in the past, two kinds of energy sources of power battery and super capacitor all have the two-way DC-DC interface circuit that links to each other with the direct current generating line, especially the structure of mixed energy source system self can be utilized to two kinds of interface circuit of the two kinds of energy sources of lug connection to the super capacitor module who constitutes mixed energy source constructs the voltage balancing circuit of power battery unit for the core, realize the power battery monomer voltage of each series connection at the balanced purpose of charge-discharge in-process sound attitude, need not extra supplementary voltage-sharing device.
Description
Technical field
The utility model relates to energy storage technologies, field of power supplies, refer in particular to a kind of integrated mixed tensor for electric car
Source interface circuit topological structure is suitable for the mixed energy storage systems such as electric car, urban track traffic.
Background technique
It is restricted by world petroleum resource reserves finiteness and expanding economy is to the continuous of petrol dependency degree
Increase, current oil resource scarcity makes each automobile superpower in the world face huge challenge.From the point of view of environmental protection, fuel oil
Vehicle polluted environment while largely consuming petroleum resource again.In oil shortage, Public environmental attitude is significantly increased, government
It pushes, under the overall situation that laws and regulations become better and approaching perfection day by day and the common people improve the electric car degree of recognition, electric car is drawing
Lead the trend of World Automobile Industry.Reliably, the dynamical system of high efficiency and low cost is the key that electric car, energy therein
Memory technology is current one of the key factor for restricting Development of Electric Vehicles, and using lithium battery as the power battery of representative, energy is close
Degree is outstanding, but the index of power density and cycle life is general, and especially High-current output itself can further decrease circulation
Service life.For supercapacitor as a kind of novel energy-storage travelling wave tube, cycle life performance is superior, and power density is prominent, but energy
Density is lower, therefore can be used as supplementary energy and the big power battery of energy density constitutes the hybrid energy sources of electric car,
The advantage for taking into account two kinds of single energy storage sources, makes up the shortcoming of traditional electric car.
Under normal conditions, the mixed energy storage system of electric car is to pass through specific interface circuit by different energy-storage units
It is formed by connecting with certain connection type, existing connection type specifically includes that 1, power battery unit and supercapacitive cell
Directly it is parallel to DC bus；2, after power battery unit is connected with bi-directional DC-DC interface circuit again with supercapacitive cell simultaneously
It is coupled to DC bus；3, it is parallel to directly with power battery unit again after supercapacitive cell is connected with bi-directional DC-DC interface circuit
Flow bus；4, power battery unit and supercapacitive cell are all respectively by bi-directional DC-DC interface circuit in parallel in DC bus
These four connection types.Different connection topologys not only will have a direct impact on each energy-storage units and play its advantages characteristic, but also
Also the effect of energy management is influenced whether, thus different connection types determines the different performance of mixed energy storage system.
Power battery unit is the core component of electric car hybrid energy sources, and the voltage class of single power battery
It is low, it must be obtained by multiple power batteries are monomer series-connected to obtain the high power battery pack of voltage class.Exist in power battery
When being used in series, the inconsistent utilization rate and service life that will affect entire power battery unit of voltage is held, it is wide to limit it
General application.In conventional hybrid energy source system, the connection type of energy-storage units is more single, lacks to be directed to and undertakes linkage function
Power electronics interface circuit topological structure research, especially existing topological structure do not consider different energy-storage units it
Between be directly connected to, without direct interconnection, this no doubt simplifies the composition of system and control, has isolated mixed energy storage system
Globality, constraining different energy storage sources, respectively advantages characteristic complementation plays.
Utility model content
The purpose of this utility model is to overcome the deficiencies of existing hybrid energy sources electric vehicle engineering, provide a kind of use
It can be real respectively in the Topology connection mode of the integrated hybrid energy sources interface circuit topological structure of electric car, the interface circuit
The independent control of energy between existing two kinds of energy storage sources and DC bus, and two kinds of energy sources not only may be implemented in the topology itself
DIRECT ENERGY exchange, the principle for being also based on time-sharing multiplex realize the uniform voltage function of power battery unit.Compared to more traditional
Hybrid energy sources topology, using less component, realizes the power battery unit sound of high speed, high efficiency, low cost
The complementary of advantages characteristic plays between state technology of pressure equalization and two kinds of energy storage sources, effectively improves power battery unit service life and vehicle
Power performance provides greater flexibility for regenerating braking energy recycling.
The technical solution adopted in the utility model: a kind of integrated hybrid energy sources interface circuit for electric car is opened up
Structure is flutterred, which includes:
The bi-directional DC-DC interface circuit one of power battery unit and DC bus is connected,
By the interface circuit two between inductance element and switching network the power battery unit constituted and supercapacitive cell,
Connect the bi-directional DC-DC interface circuit three of supercapacitive cell and DC bus；
The power battery unit and supercapacitive cell pass through bi-directional DC-DC interface circuit one and bi-directional DC-DC respectively
Interface circuit three realizes the independent control of the energy exchange between DC bus；
Using supercapacitive cell as core, the interface circuit two to be directly connected to two kinds of energy sources constructs for balancing circuitry
The voltage balance circuit of power battery unit；
The medium pressed using lossless element super capacitor as power battery unit realizes each concatenated power battery list
Bulk voltage moves static equilibrium in charge and discharge process；
According to the principle of time-sharing multiplex, the interface circuit two for being directly connected to two kinds of energy sources realizes power battery and super electricity
Hold the DIRECT ENERGY exchange in two class energy storage sources.
The utility model has the advantages that
1) power battery and two class energy source of super capacitor all have the bi-directional DC-DC interface electricity being connected with DC bus
Road can realize the independent control of energy between two kinds of energy storage sources and DC bus respectively.
2) design of two kinds of energy source interface circuit topological structures is directly connected to so that power may be implemented for itself in the device
The uniform voltage function of battery unit, without for the pressure-equalizing device outside power battery unit plus.It is additional to efficiently reduce
The use of component, whole device is at low cost, and bulking value is small.
3) design of two kinds of energy source interface circuit topological structures is directly connected to so that having between two kinds of energy sources direct
" energy transmission channel ", the two-way exchange of energy may be implemented, thus the complementary advantages characteristic for playing two kinds of energy storage sources, effectively
The service life cycle for improving power battery unit promotes the output quality of energy source and then increases the power performance of vehicle, and
And greater flexibility and more optimum choices can also be provided for the recycling of regenerating braking energy.
Detailed description of the invention
Fig. 1 is the apparatus structure schematic diagram of the utility model.
Fig. 2 a and Fig. 2 b are that interface circuit presses operation schematic diagram.
Fig. 3 a and Fig. 3 b are interface circuit Pressure and Control flow chart.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and detailed description.
As shown in Figure 1, a kind of integrated hybrid energy sources interface circuit topological structure for electric car, topology knot
Structure includes: the bi-directional DC-DC interface circuit 1 for connecting power battery unit and DC bus, by inductance element and switching network
Interface circuit 22 between the power battery unit and supercapacitive cell of composition connects supercapacitive cell and DC bus
Bi-directional DC-DC interface circuit 33；
The power battery unit and supercapacitive cell pass through bi-directional DC-DC interface circuit 1 and bi-directional DC-DC respectively
Interface circuit 33 realizes the independent control of the energy exchange between DC bus；Using supercapacitive cell as core, to be directly connected to
The interface circuit 22 of two kinds of energy sources is balancing circuitry, the voltage balance circuit of construction force battery unit；Utilize lossless element
The medium that super capacitor is pressed as power battery unit realizes each concatenated power battery monomer voltage in charge and discharge process
Dynamic static equilibrium；According to the principle of time-sharing multiplex, the interface circuit 22 for being directly connected to two kinds of energy sources is realized power battery and is surpassed
The DIRECT ENERGY exchange in two class energy storage source of grade capacitor.
Fig. 2 be the single pressure module that is made of super capacitor and interface circuit to two adjacent cell monomers in charge and discharge
The operation schematic diagram pressed in the process (when analysis without loss of generality, selects the internal resistance model of battery, and assumes internal resistance RESR1>
RESR2).Its charge and discharge Pressure and Control flow chart is as shown in Figure 3.
When charging, voltage U is heldB1>UB2If holding voltage max UB1The most big end voltage setting value U allowed more than charginga,
Then terminate charging process；If the difference of two voltages is more than maximum allowable pressure difference Ug, then charged by changing to two battery cells
The average value of electric current achievees the purpose that electric voltage equalization.The battery for first allowing end voltage high by the movement of switch is to super capacitor
It charges (state 1), then voltage low battery cell in super capacitor opposite end discharges (state 2), then two in entire charging process
Battery cell end voltage is respectively as follows:
UB1=EB+RESR1×(I-D×I1)
UB2=EB+RESR2×(I+(1-D)×I2)
Until UB1-UB2≤Ug, stopping movement being switched, end is pressed.This process schematic is as shown in Figure 2 a, and charging is pressed
Control flow chart is as shown in Figure 3a.
When electric discharge, voltage U is heldB1<UB2If holding voltage minimum UB1The smallest end voltage setting value U allowed less than electric dischargeb,
Then terminate discharge process；If the difference of two voltages is more than maximum allowable pressure difference Ug, then still by changing to two battery cells
The average value of charging current achievees the purpose that electric voltage equalization.The battery for first allowing end voltage high by the movement of switch is to super
Capacitor charging (state 1), then voltage low battery cell in super capacitor opposite end discharges (state 2), then in entire discharge process
Two battery cell end voltages are respectively as follows:
UB1=EB-RESR1×(I-(1-D)×I1)
UB2=EB-RESR2×(I+D×I2)
Until UB1-UB2≤Ug, stopping movement being switched, end is pressed.This process schematic is as shown in Figure 2 b.Electric discharge is pressed
Control flow chart is as shown in Figure 3b.
In order to further illustrate the specific working mode of interface circuit involved in the utility model, selection is directly connected to two
Illustrate the concrete operating principle of the utility model, i.e. two kinds of energy sources for the interface circuit of kind energy source progress energy exchange
Between by interface circuit carry out energy exchange process, switch element is replaced with electric power electronic switching tube MOSFET, such as Fig. 3 institute
Show.
Fig. 3 a is the process to charge to super capacitor, and energy is transmitted to super capacitor by power battery.Make out first
Close pipe M1、M2Open-minded, power battery gives inductance L by the two switching tubes1、L2Charging；Then M is kept1It opens and makes M2Shutdown
Power battery and inductance L at this time1、L2The electric energy of middle storage passes through M1And VD3It charges to super capacitor.Above procedure is achieved that
Transmitting of the electric energy from power battery to super capacitor.
Attached drawing 3b is the process discharged super capacitor, and energy is transmitted to power battery by super capacitor.Make first
Switching tube M3Open-minded, super capacitor passes through VD1And M3To power battery charging, while inductance L1、L2Store electric energy；Then make M3It closes
Disconnected inductance L at this time1、L2The electric energy of middle storage passes through VD1、VD3Continue to charge to power battery.Above procedure is achieved that electric energy
Transmitting from super capacitor to power battery.
It should be pointed out that for those skilled in the art, before not departing from the utility model principle
It puts, several improvements and modifications can also be made, these improvements and modifications also should be regarded as the protection scope of the utility model.This reality
The available prior art of each component part being not known in example is applied to be realized.
Claims (1)
1. a kind of integrated hybrid energy sources interface circuit topological structure for electric car, it is characterised in that: topology knot
Structure includes:
The bi-directional DC-DC interface circuit one of power battery unit and DC bus is connected,
By the interface circuit two between inductance element and switching network the power battery unit constituted and supercapacitive cell,
Connect the bi-directional DC-DC interface circuit three of supercapacitive cell and DC bus；
The power battery unit and supercapacitive cell pass through bi-directional DC-DC interface circuit one and bi-directional DC-DC interface respectively
Circuit three realizes the independent control of the energy exchange between DC bus；
Using supercapacitive cell as core, to be directly connected to the interface circuits two of two kinds of energy sources as balancing circuitry, construction force
The voltage balance circuit of battery unit；
The medium pressed using lossless element super capacitor as power battery unit realizes each concatenated power battery monomer electricity
It is pressed in charge and discharge process and moves static equilibrium；
According to the principle of time-sharing multiplex, the interface circuit two for being directly connected to two kinds of energy sources realizes power battery and super capacitor two
The DIRECT ENERGY in class energy storage source exchanges.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820696236.7U CN208198121U (en) | 2018-05-10 | 2018-05-10 | Integrated hybrid energy source interface circuit topological structure for electric automobile |
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| CN201820696236.7U CN208198121U (en) | 2018-05-10 | 2018-05-10 | Integrated hybrid energy source interface circuit topological structure for electric automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108422869A (en) * | 2018-05-10 | 2018-08-21 | 安徽大学 | Integrated hybrid energy source interface circuit topological structure for electric automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108422869A (en) * | 2018-05-10 | 2018-08-21 | 安徽大学 | Integrated hybrid energy source interface circuit topological structure for electric automobile |
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Granted publication date: 20181207 Termination date: 20200510 |