A kind of battery pack being used in solar energy photovoltaic system
Technical field
Technical field of new energy application is the utility model is related to, is used for more particularly, to a kind of in solar energy photovoltaic system
Battery pack.
Background technology
Since revolution is industrialized, with uncontrolled exploitation of the mankind for non-renewable resources such as coal, oil, natural gases
And utilization, occur worldwide energy crisis in recent years, and solar energy is increasingly becoming various countries' profit as regenerative resource
Main flow new energy.Solar energy power generating has been widely used as emerging green energy resource;Especially make
For the highway of intercity tie, its major part build field and mountain area in, and electric load is small, and (more than ten kilometers of website loads are not
More than 100W), pull bar wiring cost is too high, and cost performance is relatively low, and supply of electric power is more inconvenient, solar powered to be especially suitable for electric power
The small field locations of load use.
But the energy-storage units in solar energy photovoltaic system are based on lead-acid battery at present, such battery is affected by temperature
Larger, when temperature is less than zero degrees celsius, accumulator property can be greatly lowered, and when less than subzero 20 degrees Celsius, capacity is only surplus
Less than the 50% of nominal capacity.Therefore, it is necessary to carry out buried protective treatment to battery, as shown in figure 1, should have at buried protection
The battery pack of reason includes the anti-well 101 dug on the ground, and lead-acid accumulator 102 is arranged in incubator 103, and will protect
Incubator 103 is placed in anti-well 101, finally need to also set door plate 104 in the well head of anti-well 101.The battery of this kind of structure
Group installation foundation is complex, it is necessary to be incubated and water-proofing treatment, cost are higher.
Meanwhile it is existing with lead-acid accumulator 102 for often user will select in the solar power system of energy-storage units
With many devices such as storage charging-discharging controller, communication unit, bms administrative units, protection location, lightning protection, system component units mistake
It is cause system design complicated more, higher is required to field installation process, controller type selecting is improper or sets mistake frequently can lead to
Thrashing causes expendable damage to battery pack.
Therefore it provides a kind of battery pack being used in solar energy photovoltaic system, to reduce the complexity of installation foundation,
The outer quantity for matching somebody with somebody component is reduced simultaneously, so as to reduce the mounting process requirement to user, reduces error rate, the system of raising can
By property, just turn into those skilled in the art's technical problem urgently to be resolved hurrily.
Utility model content
The purpose of this utility model is to provide a kind of battery pack being used in solar energy photovoltaic system, to reduce installation base
The complexity of plinth, while the outer quantity for matching somebody with somebody component is reduced, so as to reduce the mounting process requirement to user, reduce error
Rate, improve system reliability.
To achieve these goals, the utility model provides a kind of battery pack being used in solar energy photovoltaic system, including
Control unit and battery unit, in addition to housing, described control unit and the battery unit are mounted in the housing;
Charging inlet for connecting solar panel is arranged at intervals with the lateral surface of the housing and for connecting
The power supply interface of load, the battery unit include multiple lithium titanate batteries being sequentially connected in series, each lithium titanate battery interval
Set;
The charging inlet electrically connects with the charging port of the battery unit, the power supply interface and the battery unit
Electricity output interface electrical connection;
Fixed hook is additionally provided with the lateral surface of the housing, the housing is mounted on fixation by the fixed hook
Supporting surface.
Further, the battery unit is multigroup that battery unit parallel side-by-side described in each group is arranged.
Further, the power supply interface is multiple that each power supply interface is evenly arranged in the lateral surface of the housing.
Further, the lateral surface that the lateral surface of the fixed hook installation opens up with the power supply interface is relative side
Face.
Further, the power supply interface is opened on the same side of the housing with the charging inlet.
Further, the housing is Al-alloy casing or engineering plastics housing.
Further, the monomer voltage of the lithium titanate battery is 2.4V.
Battery pack provided by the utility model is used for solar energy photovoltaic system, and the battery pack includes being used to protect its internal control
The housing of unit and battery unit processed, is arranged at intervals with the charging for connecting solar panel on the lateral surface of housing
Mouth and the power supply interface for connecting load, the battery unit include multiple lithium titanate batteries being sequentially connected in series, each titanium
Acid lithium battery is arranged at intervals;The charging inlet electrically connects with the charging port of the battery unit, the power supply interface and institute
State the electricity output interface electrical connection of battery unit;Fixed hook is additionally provided with the lateral surface of the housing, the housing passes through
The fixed hook is mounted on fixed support surfaces.
Part needed for whole systems is integrated into enclosure interior by the battery pack, and user is without individually match other attached match somebody with somebody
Part, it is only necessary to connect solar panel input and load output can be used, reduce the outer quantity for matching somebody with somebody component, so as to reduce
Mounting process requirement to user, reduces error rate, improves system reliability;It is arranged on simultaneously using mounting mode
In fixed support surfaces, the complexity of installation foundation is reduced;Filled in addition, the battery pack employs lithium titanate battery as energy storage
Put, lithium titanate battery be a kind of power density is high, energy density is high, have extended cycle life and can fast charging and discharging battery, and have
There are instantaneous high-current discharge and environmentally safe characteristic, so as to extend service life, avoid environmental pollution.
Brief description of the drawings
Fig. 1 is the structural representation that existing battery pack has protective treatment;
Fig. 2 is the battery pack a kind of embodiment provided by the utility model being used in solar energy photovoltaic system
Structural representation;
Fig. 3 is the sectional view of battery pack shown in Fig. 2.
Description of reference numerals:
The anti-wells of 101-
102- lead-acid accumulators
103- incubators
104- door plates
1- control units
2- battery units
3- housings
4- charging inlets
5- power supply interfaces
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
Fig. 2 and Fig. 3 are refer to, Fig. 2 is the battery pack one provided by the utility model being used in solar energy photovoltaic system
The structural representation of kind embodiment;Fig. 3 is the sectional view of battery pack shown in Fig. 2.
In a kind of embodiment, battery pack provided by the utility model is used for solar energy photovoltaic system, the battery
Group includes being used for the housing 3 for protecting its internal control unit 1 and battery unit 2, is arranged at intervals on the lateral surface of housing 3 useful
In the charging inlet 4 of connection solar panel and for connecting the power supply interface 5 loaded, the battery unit 2 includes multiple
The lithium titanate battery being sequentially connected in series, each lithium titanate battery are arranged at intervals;The charging inlet 4 and the battery unit 2
Charging port electrically connects, and the power supply interface 5 electrically connects with the electricity output interface of the battery unit 2;Outside the housing 3
Fixed hook is additionally provided with side, the housing 3 is mounted on fixed support surfaces by the fixed hook.Above-mentioned charging inlet
4 be that input terminal is located at one end of battery pack, inputs as a pair of MC4 terminals, can connect solar panel or other fill
Electric equipment, plug formula binding post;Power supply interface 5 is output end, and the output end is directly connected to load and used, the battery pack
Multiple-channel output (maximum 5 tunnels) or single channel lead-out terminal may be selected.
The battery pack also includes control unit 1, and specifically, the control unit 1 includes charging-discharging controller, BMS, temperature
The units such as sensing, communication, lightning protection, short-circuit protection, comprehensive protection against fault is provided for system.
Above-mentioned 4 external solar panel of charging inlet, specifically, the charging device of external solar energy photovoltaic system should
Charging device includes the booster circuit and reduction voltage circuit of series connection, and solar panel just facing to the sun, utilizes the photograph of the sun
The conversion of row solar energy is injected, solar energy is converted to electrical power storage, solar panel and the boosting electricity on daytime
Road electrically connects, and battery pack electrically connects with reduction voltage circuit;The electric energy for first carrying out solar energy conversion when solar energy photovoltaic system works
Output voltage rise to a stable magnitude of voltage, then the charging voltage being adapted to battery pack is depressurized to by reduction voltage circuit, from
And realize reliable and stable charging process.
Battery pack with load electrically connect, store daytime abundance electric energy after, it is possible to night or need power when
Energy is provided for load using the electric energy of storage as the energy, using battery unit 2 of the lithium titanate battery as battery pack, is due to
Lithium titanate battery be a kind of power density is high, energy density is high, have extended cycle life and can fast charging and discharging battery, it uses the longevity
Life can reach discharge and recharge 20000 times, and the temperature range used is at -40 ° to 60 °, and with instantaneous high-current discharge and to environment
Free of contamination characteristic.
Part needed for whole systems is integrated into inside housing 3 by the battery pack, and user is without individually match other attached match somebody with somebody
Part, it is only necessary to connect solar panel input and load output can be used, reduce the outer quantity for matching somebody with somebody component, so as to reduce
Mounting process requirement to user, reduces error rate, improves system reliability;It is arranged on simultaneously using mounting mode
In fixed support surfaces, the complexity of installation foundation is reduced;Filled in addition, the battery pack employs lithium titanate battery as energy storage
Put, lithium titanate battery be a kind of power density is high, energy density is high, have extended cycle life and can fast charging and discharging battery, and have
There are instantaneous high-current discharge and environmentally safe characteristic, so as to extend service life, avoid environmental pollution.
In order to ensure operating voltage, above-mentioned battery unit 2 is preferably multigroup, the parallel side-by-side of each group battery unit 2 arrangement,
Each lithium titanate battery cell forms the arrangement mode of matrix or array, to ensure preferably space rate rate.Specifically,
The monomer voltage of the lithium titanate battery is 2.4V, the quantity of specific series-connected cell can according to requirements with the required power of battery
It is determined that it will not be described here.
Above-mentioned power supply interface 5 is multiple, and each power supply interface 5 is evenly arranged in the lateral surface of the housing 3, and
The lateral surface that the lateral surface of fixed hook installation opens up with the power supply interface 5 is relative side.Multiple power supply interfaces 5 are set
Multiple loads can be connected simultaneously, improve load supplying ability, fixed hook and power supply interface 5 are opened on different sides,
Avoid both from interfering.
Power supply interface 5 is opened on the same side of the housing 3 with charging inlet 4, in order to which each interface realizes position
It is unified.
Specifically, above-mentioned housing 3 is Al-alloy casing 3 or engineering plastics housing 3, so as to for internal structure carry out protection and
Protection.
The various embodiments described above are only preferred embodiments of the present utility model, in the art, every to be based on this reality
With the changes and improvements in new technique scheme, should not exclude outside the scope of protection of the utility model.