CN110336340A - Lithium battery charging system and working method - Google Patents
Lithium battery charging system and working method Download PDFInfo
- Publication number
- CN110336340A CN110336340A CN201910400213.6A CN201910400213A CN110336340A CN 110336340 A CN110336340 A CN 110336340A CN 201910400213 A CN201910400213 A CN 201910400213A CN 110336340 A CN110336340 A CN 110336340A
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- Prior art keywords
- voltage
- lithium battery
- multiplication
- die block
- charging system
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to a kind of lithium battery charging system and its working method, this lithium battery charging system includes: multiplication of voltage charhing unit, the charger being electrical connected with the multiplication of voltage charhing unit, lithium battery group；Wherein the charger is adapted to provide for input voltage, after the multiplication of voltage charhing unit is suitable for adjusting the voltage class of input voltage, to charge to the lithium battery group；The lithium battery group is further adapted for carrying out pressure supply by DC bus of the multiplication of voltage charhing unit to the charger；The present invention is by adjusting charging to lithium battery group after the voltage class of input voltage, and the DC bus of lithium battery group and charger is linked together and carries out energy and mutually flows, the chargeable range for taking full advantage of charger also as save use cost while improving practicability；It realizes that energy is mutually supported, improves reliability and stability；The voltage output of a variety of different voltages grades is realized, to cope with the dynamic lithium battery group of multiple voltage grade.
Description
Technical field
The present invention relates to a kind of lithium battery energy field more particularly to a kind of lithium battery charging system and working methods.
Background technique
Railcar is using electric energy as power source.Subway in construction and operation stage, although the safety of traction power supply and
Reliability has obtained enough attention, but still railcar power supply short interruptions unavoidably occurs or paralyse for a long time.At this time
Iron car can not normally start, metro operation quotient substantially all can using engineering maintenance vehicle implement rescue, by railcar draw to
Next platform.But whole process needs to spend dozens of minutes at the soonest, therefore will lead to the delay of other vehicles in use.
In order to avoid being had an impact to subsequent railcar operation.Some main engine plants increase emergency traction in railcar
Function improves DC110V accumulator capacity, or even is individually equipped with dynamic lithium battery group and is used for battery traction.At railcar
When emergency, subway train voluntarily meets an urgent need traction to next platform, withdraws convenient for passenger safety.
But dynamic lithium battery group usually requires to charge using individual charging unit, but what the charging unit used
Number is seldom, and the replaceability of charhing unit is poor, and a voltage class corresponds to a kind of charging unit, then and power lithium battery
It is not carried out between energy and interconnects between pond group and secondary battery unit, this can undoubtedly reduce the access times of dynamic lithium battery group.
Therefore, it needs to develop a kind of new lithium battery charging system and working method, to solve the above problems.
Summary of the invention
The object of the present invention is to provide a kind of lithium battery charging system and working methods.
In order to solve the above-mentioned technical problems, the present invention provides a kind of lithium battery charging systems comprising: multiplication of voltage charging is single
Member, the charger being electrical connected with the multiplication of voltage charhing unit, lithium battery group；Wherein the charger is adapted to provide for input electricity
Pressure, after the multiplication of voltage charhing unit is suitable for adjusting the voltage class of input voltage, to charge to the lithium battery group；It is described
Lithium battery group is further adapted for carrying out pressure supply by DC bus of the multiplication of voltage charhing unit to the charger.
Further, the multiplication of voltage charhing unit includes: the DC/DC isolated converter being connected with charger output end, and
The multiplication of voltage conversion module being connected with the DC/DC isolated converter；The output end of the multiplication of voltage conversion module is connected with lithium battery group.
Further, the multiplication of voltage charhing unit includes: the DC/DC isolated converter that two-way is arranged in parallel, and and charger
Output end is connected；And the multiplication of voltage conversion module being respectively connected with two DC/DC isolated converters；The output of twice of pressure conversion module
It is connected after the series connection of end with lithium battery group.
Further, the multiplication of voltage charhing unit includes: multiplication of voltage conversion module；The multiplication of voltage conversion module includes: the first order
Times die block, the second level times die block, the third level times die block；The first order times die block is suitable for carrying out the to input voltage
Level-one multiplication of voltage；The second level times die block is adapted to the first order times die block, with to voltage after first order multiplication of voltage into
Row second level multiplication of voltage；The third level times die block is adapted to the second level times die block, to electric after the multiplication of voltage of the second level
Pressure exports after carrying out third level multiplication of voltage to the lithium battery group.
Further, the first order times die block includes: voltage-multiplying circuit；The voltage-multiplying circuit includes: input inductance, half-bridge
IGBT unit and bus capacitor；The wherein midpoint of one end connection half-bridge IGBT unit of the input inductance, other end conduct
Input terminal；The bus capacitor is in parallel with two output ends of half-bridge IGBT unit.
Further, the second level times die block includes two voltage-multiplying circuits；Half-bridge in the first order times die block
Two output ends of IGBT unit are separately connected the input inductance of two voltage-multiplying circuits in the die block of the second level times；Two voltage-multiplying circuit shapes
At three output ends, i.e., an output end of two voltage-multiplying circuits is incorporated as public output, and respectively between two output ends
It is parallel with bus capacitor.
Further, the third level times die block includes three voltage-multiplying circuits；Three outputs of the second level times die block
End is separately connected the input inductance of voltage tripler in the third level times die block；Three voltage-multiplying circuits form two output ends to connect
The lithium battery group.
Further, the lithium battery charging system further includes control module；The control module is suitable for controlling multiplication of voltages at different levels
Corresponding half-bridge IGBT unit on-off in module changes the amplification factor in a disguised form answering times die block and at different levels times of die block outputs
The phase difference of voltage.
On the other hand, the present invention provides a kind of working method of lithium battery charging system comprising: adjust input voltage
Voltage class, to charge to lithium battery group；Pressure supply is carried out by DC bus of the lithium battery group to charger.
The working method is suitable for realizing that charger is filled to lithium battery group using such as above-mentioned lithium battery charging system
Electricity.
The invention has the advantages that the present invention is by adjusting filling lithium battery group after the voltage class of input voltage
Electricity, and the DC bus of lithium battery group and charger linked together and carries out energy and mutually flows, take full advantage of filling for charger
Electric range also as save use cost while improving practicability；It realizes that energy is mutually supported, improves reliability and stabilization
Property；The voltage output of a variety of different voltages grades is realized, to cope with the dynamic lithium battery group of multiple voltage grade.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the functional block diagram of lithium battery charging system of the invention；
Fig. 2 is the functional block diagram of the another embodiment of lithium battery charging system of the invention；
Fig. 3 is the circuit diagram of multiplication of voltage conversion module of the invention；
Fig. 4 is the drive waveforms figure of at different levels times of die blocks of the invention；
Fig. 5 is the flow chart of the working method of lithium battery charging system of the invention.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
Embodiment 1
Fig. 1 is the functional block diagram of lithium battery charging system of the invention.
In the present embodiment, as shown in Figure 1, present embodiments providing a kind of lithium battery charging system comprising: multiplication of voltage is filled
Electric unit, the charger being electrical connected with the multiplication of voltage charhing unit, lithium battery group；Wherein the charger is adapted to provide for inputting
Voltage, after the multiplication of voltage charhing unit is suitable for adjusting the voltage class of input voltage, to charge to the lithium battery group；Institute
Lithium battery group is stated to be further adapted for carrying out pressure supply by DC bus of the multiplication of voltage charhing unit to the charger.
In the present embodiment, the present embodiment is by adjusting charging to lithium battery group after the voltage class of input voltage,
And the DC bus of lithium battery group and charger links together and carries out energy and mutually flows, take full advantage of the charging model of charger
It encloses, also as save use cost while improving practicability；It realizes that energy is mutually supported, improves reliability and stability；
The voltage output of a variety of different voltages grades is realized, to cope with the dynamic lithium battery group of multiple voltage grade.
In order to carry out transmitted in both directions electric energy, the multiplication of voltage charhing unit include: the DC/DC that is connected with charger output end every
From converter, and the multiplication of voltage conversion module being connected with the DC/DC isolated converter；The output end of the multiplication of voltage conversion module with
Lithium battery group is connected.
Fig. 2 is the functional block diagram of the another embodiment of lithium battery charging system of the invention.
In order to realize that the lithium battery group to different voltages grade charges, as shown in Fig. 2, the multiplication of voltage charhing unit packet
It includes: the DC/DC isolated converter that two-way is arranged in parallel, and be connected with charger output end；And with two DC/DC isolated converters
The multiplication of voltage conversion module being respectively connected with；It is connected after the output end series connection of twice of pressure conversion module with lithium battery group.
In the present embodiment, the multiplication of voltage conversion module being respectively connected with by two DC/DC isolated converters, twice of buckling mold changing
It is connected after the output end series connection of block with lithium battery group, the voltage output of a variety of different voltages grades is realized, to cope with a variety of electricity
Press the dynamic lithium battery group of grade.
Fig. 3 is the circuit diagram of multiplication of voltage conversion module of the invention.
In order to carry out multiplication of voltage output, as shown in figure 3, the multiplication of voltage charhing unit includes: multiplication of voltage conversion module；The multiplication of voltage
Conversion module includes: the first order times die block, the second level times die block, the third level times die block；The first order times die block
Suitable for carrying out first order multiplication of voltage to input voltage；The second level times die block is adapted to the first order times die block, with
Second level multiplication of voltage is carried out to voltage after first order multiplication of voltage；The third level times die block is adapted to the second level times pressing mold
Block, to output after voltage progress third level multiplication of voltage after the multiplication of voltage of the second level to the lithium battery group.
Specifically, the first order times die block includes: voltage-multiplying circuit；The voltage-multiplying circuit includes: input inductance, half-bridge
IGBT unit and bus capacitor；The wherein midpoint of one end connection half-bridge IGBT unit of the input inductance, other end conduct
Input terminal；The bus capacitor is in parallel with two output ends of half-bridge IGBT unit.
Specifically, the second level times die block includes two voltage-multiplying circuits；Half-bridge in the first order times die block
Two output ends of IGBT unit are separately connected the input inductance of two voltage-multiplying circuits in the die block of the second level times；Two voltage-multiplying circuit shapes
At three output ends, i.e., an output end of two voltage-multiplying circuits is incorporated as public output, and respectively between two output ends
It is parallel with bus capacitor.
Specifically, the third level times die block includes three voltage-multiplying circuits；Three outputs of the second level times die block
End is separately connected the input inductance of voltage tripler in the third level times die block；Three voltage-multiplying circuits form two output ends to connect
The lithium battery group.
Fig. 4 is the drive waveforms figure of at different levels times of die blocks of the invention.
In the present embodiment, as shown in figure 4, the first order times die block, the second level times die block, in the third level times die block
Half-bridge IGBT unit drive waveforms differ 120 degree respectively；Half-bridge IGBT unit drive waveforms in the first order times die block are
Waveform A, the half-bridge IGBT unit drive waveforms in the die block of the second level times are waveform B, the half-bridge in the third level times die block
IGBT unit drive waveforms are waveform C.
In the present embodiment, charger from the end the Ui input voltage value of multiplication of voltage conversion module be U1.
In the present embodiment, the first order times die block is the charging completed to capacitor C1, charge circuit are as follows: input voltage
Through inductance L1, anti-paralleled diode VT1, capacitor C1, inductance L3, anti-paralleled diode VT6, inductance L6, anti-paralleled diode
VT12。
In the present embodiment, the second level times die block is the charging for completing capacitor C2 and capacitor C3, the charging of capacitor C2 by
Capacitor C1 is completed, and since the conducting of anti-paralleled diode VT2 is so that the current potential of capacitor C1 negative terminal becomes U1, the current potential of C1 anode becomes
For 2U1, the circuit of C2 are as follows: input voltage is through inductance L2, anti-paralleled diode VT3, capacitor C2, anti-paralleled diode VT5, inductance
L3；The voltage value at both ends is U1 after capacitor C2 is fully charged, and the current potential of capacitor C2 negative terminal is U1；The charging of capacitor C3 is by front end power supply
It completes, charge circuit are as follows: input voltage is through inductance L1, anti-paralleled diode VT2, inductance L3, anti-paralleled diode VT5, electricity
Hold C3, inductance L6, anti-paralleled diode VT12, complete charging after capacitor C2 and capacitor C3 voltage value and be 2U1.
In the present embodiment, the output voltage values of the output end Uo of the third level times die block be 3U1, complete to capacitor C4,
The charging of the charging of capacitor C5 and capacitor C6, capacitor C4 is completed by capacitor C2, charge circuit are as follows: input voltage through inductance L4,
Anti-paralleled diode VT7, capacitor C4, anti-paralleled diode VT9, inductance L5；The voltage value at both ends is U1 after capacitor C4 is fully charged,
The current potential of negative terminal is 2U1；The charging of capacitor C5 is completed by capacitor C3, charge circuit are as follows: input voltage is through inductance L5, inverse parallel
Diode VT9, capacitor C5, anti-paralleled diode VT11, inductance L6；The voltage value at both ends is U1, negative terminal after capacitor C5 is fully charged
Current potential be U1；The charging of capacitor C6 is completed by front end power supply, charge circuit are as follows: input voltage is through inductance L1, inverse parallel two
Pole pipe VT2, inductance L3, anti-paralleled diode VT6, inductance L6, anti-paralleled diode VT11, capacitor C6.
In the present embodiment, the third level times die block can also be connected to charger, the first order times die block connects lithium battery
Group, to realize reversed multiplication of voltage.
Specifically, the lithium battery charging system further includes control module；The control module is suitable for controlling multiplication of voltages at different levels
Corresponding half-bridge IGBT unit on-off in module changes the amplification factor in a disguised form answering times die block and at different levels times of die block outputs
The phase difference of voltage.
Embodiment 2
Fig. 5 is the flow chart of the working method of lithium battery charging system of the invention.
On the basis of embodiment 1, the present embodiment provides a kind of working methods of lithium battery charging system, as shown in figure 5,
Comprising: the voltage class of input voltage be adjusted, to charge to lithium battery group；It is female by direct current of the lithium battery group to charger
Line carries out pressure supply.
Specifically, the working method is suitable for realizing charger using the lithium battery charging system as provided by embodiment 1
It charges to lithium battery group.
In the present embodiment, lithium battery charging system has illustrated clear in the above-described embodiments.
In order to realize that the lithium battery group to different voltages grade charges, the working method further include: by several
A lithium battery charging system is connected, and is charged with realizing to the lithium battery group of different voltages grade.
In conclusion the present invention is by adjusting charging to lithium battery group after the voltage class of input voltage, and by lithium
The DC bus of battery pack and charger, which links together, to carry out energy and mutually flows, and takes full advantage of the chargeable range of charger,
Use cost is also ad save while improving practicability；It realizes that energy is mutually supported, improves reliability and stability；It realizes more
The voltage output of kind different voltages grade, to cope with the dynamic lithium battery group of multiple voltage grade.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (10)
1. a kind of lithium battery charging system characterized by comprising
Multiplication of voltage charhing unit, the charger being electrical connected with the multiplication of voltage charhing unit, lithium battery group；Wherein
The charger is adapted to provide for input voltage, after the multiplication of voltage charhing unit is suitable for adjusting the voltage class of input voltage,
To charge to the lithium battery group；
The lithium battery group is further adapted for carrying out pressure supply by DC bus of the multiplication of voltage charhing unit to the charger.
2. lithium battery charging system as described in claim 1, which is characterized in that
The multiplication of voltage charhing unit includes: the DC/DC isolated converter being connected with charger output end, and with the DC/DC every
The multiplication of voltage conversion module being connected from converter；
The output end of the multiplication of voltage conversion module is connected with lithium battery group.
3. lithium battery charging system as described in claim 1, which is characterized in that
The multiplication of voltage charhing unit includes: the DC/DC isolated converter that two-way is arranged in parallel, and is connected with charger output end；
And
The multiplication of voltage conversion module being respectively connected with two DC/DC isolated converters；
It is connected after the output end series connection of twice of pressure conversion module with lithium battery group.
4. lithium battery charging system as claimed in claim 1 or 2, which is characterized in that
The multiplication of voltage charhing unit includes: multiplication of voltage conversion module；
The multiplication of voltage conversion module includes: the first order times die block, the second level times die block, the third level times die block；
The first order times die block is suitable for carrying out first order multiplication of voltage to input voltage；
The second level times die block is adapted to the first order times die block, to carry out second to voltage after first order multiplication of voltage
Grade multiplication of voltage；
The third level times die block is adapted to the second level times die block, to carry out third to voltage after the multiplication of voltage of the second level
It exports after grade multiplication of voltage to the lithium battery group.
5. lithium battery charging system as claimed in claim 4, which is characterized in that
The first order times die block includes: voltage-multiplying circuit；
The voltage-multiplying circuit includes: input inductance, half-bridge IGBT unit and bus capacitor；Wherein
The midpoint of one end connection half-bridge IGBT unit of the input inductance, the other end is as input terminal；
The bus capacitor is in parallel with two output ends of half-bridge IGBT unit.
6. lithium battery charging system as claimed in claim 5, which is characterized in that
The second level times die block includes two voltage-multiplying circuits；
Two output ends of half-bridge IGBT unit are separately connected two multiplication of voltages in the die block of the second level times in the first order times die block
The input inductance of circuit；
Two voltage-multiplying circuits form three output ends, i.e.,
One output end of two voltage-multiplying circuits is incorporated as public output, and is parallel with bus electricity between two output ends respectively
Hold.
7. lithium battery charging system as claimed in claim 6, which is characterized in that
The third level times die block includes three voltage-multiplying circuits；
Three output ends of the second level times die block are separately connected the input inductance of voltage tripler in the third level times die block；
Three voltage-multiplying circuits form two output ends to connect the lithium battery group.
8. lithium battery charging system as claimed in claim 6, which is characterized in that
The lithium battery charging system further includes control module；
The corresponding half-bridge IGBT unit on-off that the control module is suitable for controlling at different levels times of die blocks, which is changed, in a disguised form answers a times pressing mold
The phase difference of the amplification factor of block and at different levels times of die block output voltages.
9. a kind of working method of lithium battery charging system characterized by comprising
The voltage class of input voltage is adjusted, to charge to lithium battery group；
Pressure supply is carried out by DC bus of the lithium battery group to charger.
10. the working method of lithium battery charging system as claimed in claim 9, which is characterized in that
The working method is suitable for realizing charger to lithium using such as the described in any item lithium battery charging systems of claim 1-8
Battery pack charges.
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| CN201910400213.6A CN110336340B (en) | 2019-05-15 | 2019-05-15 | Lithium battery charging system and working method |
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| CN201910400213.6A CN110336340B (en) | 2019-05-15 | 2019-05-15 | Lithium battery charging system and working method |
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| CN105915047A (en) * | 2016-05-06 | 2016-08-31 | 上海交通大学 | Novel direct current boosted circuit |
| CN107745717A (en) * | 2017-11-03 | 2018-03-02 | 中车株洲电力机车有限公司 | Track traffic hybrid power system control circuit, rail traffic vehicles and its method of supplying power to |
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