CN204230948U - A kind of new forms of energy feed-type charge-discharge machine - Google Patents
A kind of new forms of energy feed-type charge-discharge machine Download PDFInfo
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- CN204230948U CN204230948U CN201420579196.XU CN201420579196U CN204230948U CN 204230948 U CN204230948 U CN 204230948U CN 201420579196 U CN201420579196 U CN 201420579196U CN 204230948 U CN204230948 U CN 204230948U
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Abstract
The utility model discloses a kind of new forms of energy feed-type charge-discharge machine, for solving battery pack product charge-discharge test in prior art, when grid power blackout or electricity shortage, charging measurement cannot carry out, the technical problem that the electric energy discharged when discharge test is wasted, described charge-discharge machine comprises: DC bus (101,102), energy conversion apparatus (20), DC/DC converter (301), energy-storage battery group (40), discharge and recharge DC/DC converter (50) and DC/AC converter (60); DC/AC converter (60) makes electric energy in utility grid and the upper transmission mutually of DC bus (101); Energy conversion apparatus (20) exports electric energy to DC bus (101); Energy-storage battery group (40) obtains or feedback power to DC bus (101,102); Rechargeable battery is obtained or release electric energy to DC bus (102) by discharge and recharge DC/DC converter (50).
Description
Technical field
The utility model relates to rechargeable battery production technical field, particularly relates to a kind of new forms of energy feed-type charge-discharge machine.
Background technology
Along with the fast development of portable electric appts, have also been obtained as its compact power of mainly powering source and develop fast.Compact power is mainly rechargeable battery, and in rechargeable battery production process, treating the battery product dispatched from the factory, to carry out charge-discharge test be a very important link.
At present, battery pack workshop mainly adopts the electric energy of electrical network to carry out charge and discharge cycles test to battery pack product, as shown in Figure 1, for the discharge and recharge scheme of battery pack product in prior art is powered topological diagram, part in Fig. 1 in dotted line frame is the main electric power-feeding structure of battery pack product charge and discharge cycles test macro, when city's electric control switch 10 is in conducting state, the 380V civil power of utility grid is after power frequency isolator 20 carries out filtering process, again through a unidirectional AC/DC converter (namely internal switch pipe adopts the alternating current/DC power conversion device of diode) 30, be input on the DC bus 40 of 400V, DC bus 40 is connected with multiple discharge and recharge DC/DC transducer (being about to the electric pressure converter that fixing DC voltage conversion is variable direct voltage) 50, multiple rechargeable battery (in Fig. 1, multiple rechargeable battery to be tested forms battery pack product 60) carrying out charge-discharge test and these discharge and recharges DC/DC transducer 50 connects one to one, when battery pack product 60 charges, the electric energy on DC bus 40 is input to battery pack product 60 through discharge and recharge DC/DC transducer 50, when battery pack product 60 discharge test by the power consumption of storage in the load 70 be connected with battery pack product 60.
But present inventor is in the process realizing technical scheme in the embodiment of the present application, find that above-mentioned technology at least exists following technical problem:
Carry out in the scheme of charge and discharge cycles test at existing employing electrical network electric energy to battery pack product, when utility grid cannot provide electric energy or supply power voltage deficiency due to cause specific (as trouble hunting, operating a switch), the charging measurement of battery pack product just cannot carry out; In addition, when battery pack product discharge test, the electric energy that battery pack product discharges consumes in vain in load, causes the waste of the energy.That is, there is battery pack product charge-discharge test in prior art to depend on utility grid and power, when utility grid cannot be powered or supply power voltage is not enough, battery pack product charging measurement cannot carry out, and the technical problem that the electric energy that discharges when discharge test of battery pack product is wasted.
Utility model content
The embodiment of the present application is by providing a kind of new forms of energy feed-type charge-discharge machine, solve battery pack product charge-discharge test in prior art to depend on utility grid and power, when utility grid cannot be powered or supply power voltage is not enough, battery pack product charging measurement cannot carry out, and the technical problem that the electric energy that discharges when discharge test of battery pack product is wasted, achieve the charging measurement being battery pack product by other power supply when grid power blackout or supply power voltage deficiency to power, and the electric energy that battery pack product discharges is carried out the technique effect of effectively utilization in battery pack product discharge test process.
The embodiment of the present application provides a kind of new forms of energy feed-type charge-discharge machine, is applied in rechargeable battery set production system, and described battery pack production system is connected with utility grid, and described charge-discharge machine comprises:
For transmitting the first DC bus and second DC bus of stable DC electricity;
Be connected with described first DC bus, when the voltage on described first DC bus does not meet pre-conditioned, new forms of energy be converted to electric energy and export the energy conversion apparatus of described first DC bus to;
Be connected with described energy conversion apparatus by described first DC bus, for converting the first bidirectional energy-storage DC/DC converter of galvanic magnitude of voltage;
Be connected with described second DC bus, for obtaining electric energy, when discharging to described second DC bus and/or by the energy-storage battery group of described first bidirectional energy-storage DC/DC converter to described first DC bus feedback power from described second DC bus and/or by described first bidirectional energy-storage DC/DC converter from described first DC bus when energy storage;
Connect one to one with multiple rechargeable battery, and be connected with described first bidirectional energy-storage DC/DC converter by described second DC bus, for when described rechargeable battery charges, obtain electric energy from described second DC bus and export described rechargeable battery to, and when described discharging rechargeable battery, the electric energy of described rechargeable battery is exported to multiple discharge and recharge DC/DC converters of described second DC bus;
Be connected with described utility grid, and be connected with the first bidirectional energy-storage DC/DC converter by described first DC bus, for obtaining power delivery to described first DC bus when described rechargeable battery charges from described utility grid, and obtain the bidirectional energy-storage DC/AC converter of power delivery to described utility grid when described discharging rechargeable battery and/or described utility grid disconnect from described first DC bus.
Optionally, described energy conversion apparatus is for being the photovoltaic battery panel of electric energy by transform light energy, or for being the wind turbine generator of electric energy by Wind resource change.
Optionally, described charge-discharge machine also comprises:
For by fixing DC voltage conversion being the second bidirectional energy-storage DC/DC converter different from described first bidirectional energy-storage DC/DC converter of variable direct voltage; Wherein, described energy conversion apparatus is connected on described first DC bus by described second bidirectional energy-storage DC/DC converter.
Optionally, described first DC bus and described second DC bus are same DC bus;
Described energy-storage battery group is connected with described second DC bus by described first bidirectional energy-storage DC/DC converter.
Optionally, described bidirectional energy-storage DC/AC converter comprises: the IGBT switching tube with rectification and invert function.
The one or more technical schemes provided in the embodiment of the present application, at least have following technique effect or advantage:
Due in the embodiment of the present application, by arranging bidirectional energy-storage DC/AC converter in the power supply network system of powering for battery pack product, be connected with described utility grid, can according to use need by the power delivery of utility grid to DC bus or by the back electrical energy on DC bus in utility grid; Also be provided with the energy-storage battery group that is connected with DC bus and new forms of energy can be converted to electric energy and the energy conversion apparatus is connected with DC bus, the electric energy of energy conversion apparatus conversion new forms of energy acquisition is transferred in energy-storage battery group by DC bus and stores; Energy-storage battery group also obtains electric energy by DC bus from utility grid and stores; when utility grid has a power failure or supply power voltage is not enough, by energy-storage battery group release electric energy on DC bus, with the requirement making the voltage on DC bus reach certain, making the multiple bidirectional energy-storage DC/DC converters be connected with DC bus obtain electric energy from DC bus is further that the multiple rechargeable batteries (i.e. test battery) be connected with multiple bidirectional energy-storage DC/DC converter charge, and the back electrical energy discharged when discharging rechargeable battery is on DC bus, and then will for the miscellaneous equipment that is connected with utility grid is powered in the back electrical energy on DC bus to utility grid by bidirectional energy-storage DC/AC converter, or make energy-storage battery group again obtain electric energy from DC bus to store, solve battery pack product charge-discharge test in prior art to depend on utility grid and power, when utility grid cannot be powered or supply power voltage is not enough, battery pack product charging measurement cannot carry out, and the technical problem that the electric energy that discharges when discharge test of battery pack product is wasted, achieve the charging measurement being battery pack product by other power supply when grid power blackout or supply power voltage deficiency to power, and the electric energy that battery pack product discharges is carried out the technique effect of effectively utilization in battery pack product discharge test process.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The charge-discharge test scheme of a kind of battery pack product that Fig. 1 provides for background technology is powered topological diagram;
The first new forms of energy feed-type charge-discharge machine structure chart that Fig. 2 provides for the embodiment of the present application;
The second new forms of energy feed-type charge-discharge machine structure chart that Fig. 3 provides for the embodiment of the present application;
The third new forms of energy feed-type charge-discharge machine structure chart that Fig. 4 provides for the embodiment of the present application;
The 4th kind of new forms of energy feed-type charge-discharge machine structure chart that Fig. 5 provides for the embodiment of the present application.
Embodiment
The embodiment of the present application is by providing a kind of new forms of energy feed-type charge-discharge machine, solve battery pack product charge-discharge test in prior art to depend on utility grid and power, when utility grid cannot be powered or supply power voltage is not enough, battery pack product charging measurement cannot carry out, and the technical problem that the electric energy that discharges when discharge test of battery pack product is wasted, achieve the charging measurement being battery pack product by other power supply when grid power blackout or supply power voltage deficiency to power, and the electric energy that battery pack product discharges is carried out the technique effect of effectively utilization in battery pack product discharge test process.
The technical scheme of the embodiment of the present application is for solving the problems of the technologies described above, and general thought is as follows:
The embodiment of the present application provides a kind of new forms of energy feed-type charge-discharge machine, be applied in rechargeable battery set production system, described battery pack production system is connected with utility grid, and described charge-discharge machine comprises: for transmitting the first DC bus and second DC bus of stable DC electricity; Be connected with described first DC bus, when the voltage on described first DC bus does not meet pre-conditioned, new forms of energy be converted to electric energy and export the energy conversion apparatus of described first DC bus to; Be connected with described energy conversion apparatus by described first DC bus, for converting the first bidirectional energy-storage DC/DC converter of galvanic magnitude of voltage; Be connected with described second DC bus, for obtaining electric energy, when discharging to described second DC bus and/or by the energy-storage battery group of described first bidirectional energy-storage DC/DC converter to described first DC bus feedback power from described second DC bus and/or by described first bidirectional energy-storage DC/DC converter from described first DC bus when energy storage; Connect one to one with multiple rechargeable battery, and be connected with described first bidirectional energy-storage DC/DC converter by described second DC bus, for when described rechargeable battery charges, obtain electric energy from described second DC bus and export described rechargeable battery to, and when described discharging rechargeable battery, the electric energy of described rechargeable battery is exported to multiple discharge and recharge DC/DC converters of described second DC bus; Be connected with described utility grid, and be connected with the first bidirectional energy-storage DC/DC converter by described first DC bus, for obtaining power delivery to described first DC bus when described rechargeable battery charges from described utility grid, and obtain the bidirectional energy-storage DC/AC converter of power delivery to described utility grid when described discharging rechargeable battery and/or described utility grid disconnect from described first DC bus.
Visible, in the embodiment of the present application, by arranging bidirectional energy-storage DC/AC converter in the power supply network system for powering for battery pack product, be connected with described utility grid, can according to use need by the power delivery of utility grid to DC bus or by the back electrical energy on DC bus in utility grid; Also be provided with the energy-storage battery group that is connected with DC bus and new forms of energy can be converted to electric energy and the energy conversion apparatus is connected with DC bus, the electric energy of energy conversion apparatus conversion new forms of energy acquisition is transferred in energy-storage battery group by DC bus and stores; Energy-storage battery group also obtains electric energy by DC bus from utility grid and stores; when utility grid has a power failure or supply power voltage is not enough, by energy-storage battery group release electric energy on DC bus, with the requirement making the voltage on DC bus reach certain, making the multiple bidirectional energy-storage DC/DC converters be connected with DC bus obtain electric energy from DC bus is further that the multiple rechargeable batteries (i.e. test battery) be connected with multiple bidirectional energy-storage DC/DC converter charge, and the back electrical energy discharged when discharging rechargeable battery is on DC bus, and then will for the miscellaneous equipment that is connected with utility grid is powered in the back electrical energy on DC bus to utility grid by bidirectional energy-storage DC/AC converter, or make energy-storage battery group again obtain electric energy from DC bus to store, solve battery pack product charge-discharge test in prior art to depend on utility grid and power, when utility grid cannot be powered or supply power voltage is not enough, battery pack product charging measurement cannot carry out, and the technical problem that the electric energy that discharges when discharge test of battery pack product is wasted, achieve the charging measurement being battery pack product by other power supply when grid power blackout or supply power voltage deficiency to power, and the electric energy that battery pack product discharges is carried out the technique effect of effectively utilization in battery pack product discharge test process.
In order to better understand technique scheme, below in conjunction with Figure of description and concrete execution mode, technique scheme is described in detail, the specific features being to be understood that in the embodiment of the present application and embodiment is the detailed description to technical scheme, instead of the restriction to technical scheme, when not conflicting, the technical characteristic in the embodiment of the present application and embodiment can combine mutually.
Embodiment one
Please refer to Fig. 2, the embodiment of the present application provides a kind of new forms of energy feed-type charge-discharge machine, be applied in rechargeable battery set production system, described battery pack production system is connected with utility grid, utility grid is while powering for battery pack production system, be also the power supply such as power, illumination of workshop, described charge-discharge machine comprises:
For transmitting the first DC bus 101 and the second DC bus 102 of stable DC electricity;
Be connected with the first DC bus 101, when not meeting pre-conditioned for the voltage on the first DC bus 101, new forms of energy be converted to electric energy and export the energy conversion apparatus 20 of the first DC bus 101 to;
Be connected with energy conversion apparatus 20 by the first DC bus 101, for converting the first bidirectional energy-storage DC/DC converter 301 of galvanic magnitude of voltage;
Be connected with the second DC bus 102, for obtaining electric energy from the second DC bus 102 and/or by the first bidirectional energy-storage DC/DC converter 301 from the first DC bus 101 when energy storage, when discharging to the second DC bus 102 and/or by the energy-storage battery group 40 of the first bidirectional energy-storage DC/DC converter 301 to the first DC bus 101 feedback power; Wherein, energy-storage battery group 20 can adopt the energy storage devices such as super capacitor to replace;
Connect one to one with multiple rechargeable battery, and be connected with the first bidirectional energy-storage DC/DC converter 301 by the second DC bus 102, for obtaining electric energy when described rechargeable battery charges from the second DC bus 102 and exporting described rechargeable battery to, and when described discharging rechargeable battery, the electric energy of described rechargeable battery is exported to multiple discharge and recharge DC/DC converters 50 of the second DC bus 102;
Be connected with described utility grid, and be connected with the first bidirectional energy-storage DC/DC converter 301 by the first DC bus 101, for obtaining power delivery to the first DC bus 101 when described rechargeable battery charges from described utility grid, and obtain the bidirectional energy-storage DC/AC converter 60 of power delivery to described utility grid when described discharging rechargeable battery and/or described utility grid disconnect from the first DC bus 101; Wherein, bidirectional energy-storage DC/AC converter 60 obtains power delivery to the first DC bus 101 when alternating current being converted to direct current from described utility grid, obtains power delivery to described utility grid when direct current being converted to alternating current from the first DC bus 101.
In the present embodiment, the DC bus adopted is common DC bus, common DC bus mounts rectification/inverter (namely alternating current can be converted to direct current or direct current be converted to the device of alternating current), for described charge-discharge machine provides the DC power supply of certain power.When described charge-discharge machine is operated in rectification (being converted to direct current by alternating current) state, rectification/inverter obtains power delivery on common DC bus from utility grid, thinks that the system equipment be connected with common DC bus is powered; When system works is in inversion (being converted to alternating current by direct current) state, rectification/inverter obtains electric energy from common DC bus and feeds back to electrical network, to reach energy-conservation, improves equipment operational reliability, object such as minimizing plant maintenance amount and occupation area of equipment etc.Concrete, according to different physical structures and material, DC bus has different voltage stabilizing values.
In the present embodiment, voltage on first DC bus 101 does not meet pre-conditioned, be, disconnect or utility grid voltage instability in utility grid, cause the voltage on the first DC bus 101 cannot reach its voltage stabilizing value, and then cause the voltage of the second DC bus 102 also cannot reach voltage stabilizing value, described rechargeable battery charging voltage demand cannot be met.Concrete, in the embodiment of the present application, the voltage stabilizing value of the first DC bus 101 is the first voltage stabilizing value, and the voltage stabilizing value of the second DC bus 102 is the second voltage stabilizing value; Please continue to refer to Fig. 2, the first DC bus 101 is connected by the first bidirectional energy-storage DC/DC converter 301 with the second DC bus 102; According to embody rule situation, described first voltage stabilizing value can be identical or not identical with described second voltage stabilizing value; In the embodiment of the present application, when the topological structure of battery charging and discharging machine can guarantee that the direct current on the first DC bus 101 reaches described first voltage stabilizing value, the direct current on the second DC bus 102 also reaches the second voltage stabilizing value; Relative, when the direct current on the first DC bus 101 cannot reach described first voltage stabilizing value, and when the second DC bus 102 does not have other Power supply, the voltage on the second DC bus 102 also cannot reach described second voltage stabilizing value.
In the present embodiment, bidirectional energy-storage DC/AC converter 60 is rectification/inverter, and bidirectional energy-storage DC/AC converter 60 inside comprises: the IGBT switching tube with rectification and invert function; IGBT (Insulated Gate Bipolar Transistor) i.e. insulated gate bipolar transistor, can forward conduction and reverse-conducting.Concrete, when energy storage DC/AC converter 50 rectification, IGBT switching tube forward conduction, makes the alternating current in utility grid carry out direct current conversion by energy storage DC/AC converter 60 and becomes direct current and be transported on the first DC bus 101; When energy storage DC/AC converter 50 inversion, IGBT switching tube reverse-conducting, make the direct current of the first DC bus 101 carry out interchange conversion by energy storage DC/AC converter 50 become alternating current and feed back to utility grid, being that the miscellaneous equipment be connected with utility grid is powered when utility grid has a power failure.
Due in specific implementation process, the magnitude of voltage that energy conversion apparatus 30 changes the electric energy outputted on the first DC bus 101 may cannot meet the needs of practical application into a fixed voltage, for described fixed voltage is converted to variable voltage, to meet practical application request, as shown in Figure 2, the electric energy that energy conversion apparatus 30 and utility grid are carried to the first DC bus 101 can be transported on the second DC bus 102 after the first bidirectional energy-storage DC/DC converter 401 carries out voltage transitions.
Further, in the present embodiment, energy conversion apparatus 30 is for being the photovoltaic battery panel of electric energy by transform light energy, or for being the wind turbine generator of electric energy by Wind resource change.When energy conversion apparatus 30 is photovoltaic battery panel, solar energy is converted to electric energy by energy conversion apparatus 30, is transported on the first DC bus 101; When energy conversion apparatus 30 is wind turbine generator, Wind resource change is electric energy by energy conversion apparatus 30, is transported on the first DC bus 101.In specific implementation process, according to practical application request, energy conversion apparatus 30 also can be the device that new forms of energy can be converted to electric energy by other, is not specifically limited here.
Below for energy conversion apparatus 20 for photovoltaic battery panel, for the new forms of energy feed-type charge-discharge machine shown in Fig. 2, introduce its specific works pattern: A, daytime and utility grid is described battery charging and discharging machine powers
In the process of described rechargeable battery charging measurement, bidirectional energy-storage DC/AC converter 60 obtains electric energy from utility grid, and to be converted into voltage be that the direct current of the first voltage is transported on the first DC bus 101.When the voltage on the first DC bus 101 can reach described first voltage stabilizing value (as 400V), the direct current that the direct current of the first voltage is converted to the second voltage (different from the first voltage) by the first bidirectional energy-storage DC/DC converter 301 is transported on the second DC bus 102; When the voltage on the first DC bus 101 is lower than its voltage stabilizing value (as 400V), energy conversion apparatus 20 starts work, solar energy is converted to power delivery on the first DC bus 101, its voltage stabilizing value is reached to make the voltage on the first DC bus 101, and be transported on the second DC bus 102 after voltage transitions being carried out to the direct current on the first DC bus 101 by the first bidirectional energy-storage DC/DC converter 301, reach described second voltage stabilizing value to make the direct current on the second DC bus 102.When the direct voltage on the second DC bus 102 is described second voltage stabilizing value, multiple discharge and recharge DC/DC converter 50 carries out voltage transitions to meet the charging voltage demand of described multiple rechargeable battery to the direct current on the second DC bus 102, and realizes charging normal of described multiple rechargeable battery.In addition, for energy-storage battery group 40, when the magnitude of voltage on the second DC bus 102 reaches its voltage stabilizing value, and when the electric energy stored in energy-storage battery group 40 does not reach full scale, energy-storage battery group 40 obtains electric energy from the second DC bus 102, stores.In the process that described discharging rechargeable battery is tested, feed back on the second DC bus 102 after the electric energy that described rechargeable battery discharges carries out voltage transitions by multiple discharge and recharge DC/DC converter 50, when not reaching full scale to make energy-storage battery group 40 energy storage, obtain electric energy from the second DC bus 102, store; Or when utility grid disconnects, by the first bidirectional energy-storage DC/DC converter 301 and bidirectional energy-storage DC/AC converter 60 by the back electrical energy on the second DC bus 102 to utility grid, think other power electricity consuming apparatus be connected with utility grid.
B, daytime and utility grid cannot be powered for described battery charging and discharging machine due to reasons such as power failures
In the process of described rechargeable battery charging measurement, energy conversion apparatus 20 starts work, solar energy is converted to power delivery on the first DC bus 101, described first voltage stabilizing value is reached to make the voltage on the first DC bus 101, and be transported on the second DC bus 102 after voltage transitions being carried out to the direct current on the first DC bus 101 by the first bidirectional energy-storage DC/DC converter 301, reach described second voltage stabilizing value to make the direct current on the second DC bus 102.When the direct voltage on the second DC bus 102 is described second voltage stabilizing value, multiple discharge and recharge DC/DC converter 50 carries out voltage transitions to meet the charging voltage demand of described multiple rechargeable battery to the direct current on the second DC bus 102, and realizes charging normal of described multiple rechargeable battery.In addition, in specific implementation process, for energy-storage battery group 40, when the magnitude of voltage on the second DC bus 102 reaches its voltage stabilizing value, and when in energy-storage battery group 40, the electric energy of storage does not reach full scale, energy-storage battery group 40 obtains electric energy from the second DC bus 102, charges; For bidirectional energy-storage DC/AC converter 60, when there is electric energy in the first DC bus 101, bidirectional energy-storage DC/AC converter 60 can obtain direct current from the first DC bus 101 and be converted to alternating current, and sends into utility grid, thinks other power electricity consuming apparatus be connected with utility grid.
In the process that described discharging rechargeable battery is tested, feed back on the second DC bus 102 after the electric energy that described rechargeable battery discharges carries out voltage transitions by multiple discharge and recharge DC/DC converter 50, make energy-storage battery group 40 when energy storage does not reach full scale, electric energy is obtained from the second DC bus 102, store, when energy-storage battery group 20 energy storage reaches Full Charge Capacity, the electric energy on the second DC bus 102 is transported to utility grid by the first bidirectional energy-storage DC/DC converter 401 and bidirectional energy-storage DC/AC converter 50 and uses for other current consuming apparatus.
C, evening and utility grid is described battery charging and discharging machine powers in the process of described rechargeable battery charging measurement, bidirectional energy-storage DC/AC converter 60 obtains electric energy from utility grid, and to be converted into voltage be that the direct current of the first voltage is transported on the first DC bus 101.The direct current that the direct current of the first voltage is converted to the second voltage (different from the first voltage) by the first bidirectional energy-storage DC/DC converter 301 is transported on the second DC bus 102.After this two kinds of situations are comprised: (1) is when the magnitude of voltage on the second DC bus 102 is the second voltage stabilizing value, multiple discharge and recharge DC/DC converter 50 carries out voltage transitions to meet the charging voltage demand of described multiple rechargeable battery to the direct current on the second DC bus 102, and realizes charging normal of described multiple rechargeable battery; For energy-storage battery group 40, when the magnitude of voltage on the second DC bus 102 reaches its voltage stabilizing value, and when the electric energy stored in energy-storage battery group 40 does not reach full scale, energy-storage battery group 40 obtains electric energy from the second DC bus 102, stores; (2) when the DC voltage value on the second DC bus 102 does not reach described second voltage stabilizing value, and when storing electric energy in energy-storage battery group 40, energy-storage battery group 40 discharges electric energy on the second DC bus 102, to make when the direct voltage on the second DC bus 102 reaches described second voltage stabilizing value, thus make charging normal of described multiple rechargeable battery; Wherein, the electric energy stored in energy-storage battery group 40 can be the electric energy that daytime, energy conversion apparatus 20 conversion solar obtained, and also can be the electric energy from electrical network stored when utility grid normal power supply.
In the process that described discharging rechargeable battery is tested, feed back on the second DC bus 102 after the electric energy that described rechargeable battery discharges carries out voltage transitions by multiple discharge and recharge DC/DC converter 50, when not reaching full scale to make energy-storage battery group 40 energy storage, obtain electric energy from the second DC bus 102, store; Or when utility grid power-off, by the first bidirectional energy-storage DC/DC converter 301 and bidirectional energy-storage DC/AC converter 60 by the back electrical energy on the second DC bus 102 to utility grid, think other power electricity consuming apparatus be connected with utility grid.
D, evening and utility grid cannot be powered for described battery charging and discharging machine
When storing enough electric energy in energy-storage battery group 40, energy-storage battery group 40 discharges electric energy on the second DC bus 102, to make when the direct voltage on the second DC bus 102 reaches described second voltage stabilizing value, thus makes charging normal of described multiple rechargeable battery.Wherein, the electric energy stored in energy-storage battery group 40 can be the electric energy that daytime, energy conversion apparatus 20 conversion solar obtained, and also can be the electric energy from electrical network stored when utility grid normal power supply.
In the process that described discharging rechargeable battery is tested, feed back on the second DC bus 102 after the electric energy that described rechargeable battery discharges carries out voltage transitions by multiple discharge and recharge DC/DC converter 50, to make energy-storage battery group 40 again store electric energy, equally also can feed back in utility grid is other power electricity consuming apparatus connected.
In brief, in the application's scheme, daytime, photovoltaic battery panel normally worked, to DC bus powered, excess energy, to be made when photovoltaic battery panel energy shortage by energy-storage battery to DC bus supplementary power to the charging of energy-storage battery group by energy storage DC/DC converter; Night, photovoltaic battery panel did not have Energy transmission to quit work night, and utility grid is charged to energy-storage battery group by bidirectional energy-storage DC/AC converter and energy storage DC/DC converter, gave DC bus powered simultaneously, realized peak load shifting; Under civil power power-down conditions, daytime is given DC bus powered by photovoltaic battery panel and energy-storage battery group, and night is then given DC bus powered by energy-storage battery group, and DC bus excess energy is stored in energy-storage battery group.
The rest may be inferred, and when energy conversion apparatus 20 is wind turbine generator, mode of operation and above-mentioned four kinds of situations of described battery charging and discharging machine are similar, uniquely unlike, mode of operation, whether to have natural wind for partitioning standards, repeats here no longer one by one.In specific implementation process, please refer to Fig. 3, when energy conversion apparatus 20 is photovoltaic battery panel, in order to make the MPPT maximum power point tracking (MPPT of photovoltaic battery panel, Maximum Power Point Tracking) function played preferably, by the generating voltage of detecting real-time solar panels, and follow the trail of ceiling voltage current value, make system with maximum power output, and then the electric energy making photovoltaic battery panel obtain is utilized efficiently, described charge-discharge machine also comprises: for by fixing DC voltage conversion being the second bidirectional energy-storage DC/DC converter 302 different from the first bidirectional energy-storage DC/DC converter 301 of variable direct voltage, wherein, energy conversion apparatus 20 is connected on the first DC bus 101 by the second bidirectional energy-storage DC/DC converter 302.That is, when energy conversion apparatus 30 conversion obtains electric energy, first the fixed voltage electric energy obtained by energy conversion apparatus 30 by the second bidirectional energy-storage DC/DC converter 202 is converted to variable voltage electric energy, be transported to again on the first DC bus 101, effectively avoid or alleviate the energy loss caused when fixed voltage electric energy is carried on the first DC bus 101.
Embodiment two
Please refer to Fig. 4, in specific implementation process, the first DC bus 101 and the second DC bus 102 can be same DC bus (hereinafter referred to as DC bus 10); Energy-storage battery group 40 is connected with the second DC bus 102 by the first bidirectional energy-storage DC/DC converter 301.
In the embodiment of the present application, the mode of operation of described battery charging and discharging machine is substantially identical with embodiment one; Difference is, in the present embodiment, when energy-storage battery group 40 is charged, obtain electric energy by the first bidirectional energy-storage DC/DC converter 301 from DC bus 10 to carry out voltage transitions and import energy-storage battery group 40 storing, when energy-storage battery group 40 is discharged, transfer on DC bus 10 by the first bidirectional energy-storage DC/DC converter 301; When described multiple rechargeable battery charging, obtain electric energy by multiple discharge and recharge DC/DC converter 50 from DC bus 10 and carry out voltage transitions and one_to_one corresponding imports in multiple rechargeable battery and charges, when described multiple discharging rechargeable battery, the back electrical energy of described multiple rechargeable battery release is to DC bus 10, and be transported to energy-storage battery group 40 by the first bidirectional energy-storage DC/DC converter 301 and store, or directly fed back in utility grid by bidirectional energy-storage DC/AC converter 60.
In specific implementation process, the pressure stabilization function of DC bus 10 is embodied in, when described multiple rechargeable battery is specially two rechargeable batteries, if one of them rechargeable battery feeds back the first electric energy to DC bus 10, another rechargeable battery obtains the second electric energy to DC bus 10, and when described first electric energy equals the second electric energy, then do not need energy-storage battery group 40 or described utility grid to participate in electric energy to regulate, DC bus 10 can carry out balance of voltage coordination to described second electric energy of described first electric energy obtained and output.Certainly, this feature of DC bus is equally applicable to other embodiment of the application.
Further, in specific implementation process, please refer to Fig. 5, in order to the utilization ratio of electric energy making energy conversion apparatus 20 conversion obtain is improved, described charge-discharge machine also comprises: for by fixing DC voltage conversion being the second bidirectional energy-storage DC/DC converter 302 different from the first bidirectional energy-storage DC/DC converter 301 of variable direct voltage; Wherein, energy conversion apparatus 20 is connected on DC bus 10 by the second bidirectional energy-storage DC/DC converter 302.Embodiment, with the related introduction in embodiment one, repeats here no longer one by one.
In sum, the one or more technical schemes provided in the embodiment of the present application, at least have following technique effect or advantage:
In the embodiment of the present application, by arranging bidirectional energy-storage DC/AC converter, energy conversion apparatus and energy-storage battery group, and by DC bus, they are connected, on the one hand, new forms of energy are converted to electric energy and are transported in energy-storage battery group by DC bus and store by energy conversion apparatus, achieve and provide electric energy by energy-storage battery group to rechargeable battery (test battery) when utility grid has a power failure, carry out charge and discharge cycles test smoothly to enable test battery; The electric energy that energy conversion apparatus conversion obtains also can directly feed back in utility grid, being that the miscellaneous equipment be connected with electrical network is powered when grid power blackout; The electric energy that energy conversion apparatus conversion obtains also can be delivered directly in test battery, thinks that the test of test battery energy charge and discharge cycles provides electric energy; In addition, energy-storage battery group also can store the electric energy that utility grid is transported on DC bus, uses as stand-by power supply; On the other hand, the electric energy of test battery release can feed back on DC bus, stores or be delivered directly in utility grid to use to make energy-storage battery group to it.In brief, the application's scheme adopts energy-storage battery prescription formula, stable DC bus, can ensure that battery production does not affect by civil power power down; Adopt two-way AC/DC converter simultaneously, there is the function of peak load shifting, electrical energy saving expense; The back electrical energy that test battery discharges can be returned utility grid, achieve making full use of of electric energy; Simultaneity factor access energy conversion apparatus (as photovoltaic solar energy plate), introduces clean energy resource, saves energy, guarantee production.
Although described preferred embodiment of the present utility model, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the utility model scope.
Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.
Claims (5)
1. a new forms of energy feed-type charge-discharge machine, is applied in rechargeable battery set production system, it is characterized in that, described battery pack production system is connected with utility grid, and described charge-discharge machine comprises:
For transmitting the first DC bus (101) and second DC bus (102) of stable DC electricity;
Be connected with described first DC bus (101), when not meeting pre-conditioned for the voltage on described first DC bus (101), new forms of energy be converted to electric energy and export the energy conversion apparatus (20) of described first DC bus (101) to;
Be connected with described energy conversion apparatus (20) by described first DC bus (101), for converting the first bidirectional energy-storage DC/DC converter (301) of galvanic magnitude of voltage;
Be connected with described second DC bus (102), for obtaining electric energy from described second DC bus (102) and/or by described first bidirectional energy-storage DC/DC converter (301) from described first DC bus (101) when energy storage, when discharging to described second DC bus (102) and/or by the energy-storage battery group (40) of described first bidirectional energy-storage DC/DC converter (301) to described first DC bus (101) feedback power;
Connect one to one with multiple rechargeable battery, and be connected with described first bidirectional energy-storage DC/DC converter (301) by described second DC bus (102), for when described rechargeable battery charges, obtain electric energy from described second DC bus (102) and export described rechargeable battery to, and when described discharging rechargeable battery, the electric energy of described rechargeable battery is exported to multiple discharge and recharge DC/DC converters (50) of described second DC bus (102);
Be connected with described utility grid, and be connected with the first bidirectional energy-storage DC/DC converter (301) by described first DC bus (101), for obtaining power delivery to described first DC bus (101) when described rechargeable battery charges from described utility grid, and obtain the bidirectional energy-storage DC/AC converter (60) of power delivery to described utility grid when described discharging rechargeable battery and/or described utility grid disconnect from described first DC bus (101).
2. charge-discharge machine as claimed in claim 1, is characterized in that, described energy conversion apparatus (20) for for being the photovoltaic battery panel of electric energy by transform light energy, or for being the wind turbine generator of electric energy by Wind resource change.
3. charge-discharge machine as claimed in claim 1, it is characterized in that, described charge-discharge machine also comprises:
For by fixing DC voltage conversion being the second bidirectional energy-storage DC/DC converter (302) different from described first bidirectional energy-storage DC/DC converter (301) of variable direct voltage; Wherein, described energy conversion apparatus (20) is connected on described first DC bus (101) by described second bidirectional energy-storage DC/DC converter (302).
4. charge-discharge machine as claimed in claim 3, is characterized in that, described first DC bus (101) and described second DC bus (102) are same DC bus;
Described energy-storage battery group (40) is connected with described second DC bus (102) by described first bidirectional energy-storage DC/DC converter (301).
5. the charge-discharge machine as described in claim as arbitrary in Claims 1 to 4, is characterized in that, described bidirectional energy-storage DC/AC converter (60) comprising:
There is the IGBT switching tube of rectification and invert function.
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| CN201420579196.XU CN204230948U (en) | 2014-09-30 | 2014-09-30 | A kind of new forms of energy feed-type charge-discharge machine |
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