A kind of battery charging system of photovoltaic moduleTechnical field
The present invention relates to solar photovoltaic technology field, particularly relate to a kind of battery charging system of photovoltaic module.
Background technology
Utilizing solar power generation to charge a battery is a kind of common technology, especially in the communication base station of some remote districts.It is electric energy that solar energy base station utilizes photovoltaic to display light energy conversion, carries out accumulator cell charging and discharging management by controller for solar, when needed energy is supplied to load and uses.In actual applications, consider the situation of continuous rainy weather, storage battery needs to be equipped with larger idle capacity, to ensure when continuous rainy weather, has enough electric energy holding loads to use in storage battery.But, storage battery itself has the problem of charge acceptance, the charging of big current can be accepted at the charging initial stage, storage battery is just attended by side reaction and occurs after reaching and analysing vapour point voltage, at this moment excessive charging current not only can not be stored in storage battery, that can cause storage battery on the contrary analyses vapour and dehydration in a large number, accelerate the aging of storage battery, reduce the useful life of storage battery, although solar photovoltaic assembly still has the ability exporting electricity, but storage battery but can not accept, this just wastes the resource of photovoltaic module.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of battery charging system of photovoltaic module, adopt two group storage batteries, photovoltaic module can charge respectively to two group storage batteries, can imitate the useful life extending storage battery, and the resource of maximum using photovoltaic module.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the battery charging system providing a kind of photovoltaic module, comprise: solar photovoltaic assembly, the master controller be electrically connected with described solar photovoltaic assembly, the first storage battery be electrically connected with described master controller and the second storage battery, the inverter be connected with described first storage battery and the second storage battery, the AC load that is electrically connected with described inverter, described master controller for the electric energy that controls described solar photovoltaic assembly and send to described first storage battery or the second charge in batteries.
In a preferred embodiment of the present invention, described first storage battery is connected with the first checkout gear, and described first checkout gear is electrically connected with master controller.
In a preferred embodiment of the present invention, described second storage battery is connected with second detection device, and described second detection device is electrically connected with master controller.
In a preferred embodiment of the present invention, between described first storage battery and described first checkout gear, be also provided with the first control switch.
In a preferred embodiment of the present invention, between described second storage battery and described second detection device, be also provided with the second control switch.
The invention has the beneficial effects as follows: the present invention adopts two group storage batteries, photovoltaic module to two group storage battery wheel current charges, can imitate the useful life extending storage battery, and the resource of maximum using photovoltaic module.
Accompanying drawing explanation
Fig. 1 is the control principle drawing of battery charging system one preferred embodiment of photovoltaic module of the present invention.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
Refer to Fig. 1, the embodiment of the present invention comprises:
A kind of battery charging system of photovoltaic module, comprise: solar photovoltaic assembly, the master controller be electrically connected with described solar photovoltaic assembly, the first storage battery be electrically connected with described master controller and the second storage battery, the inverter be connected with described first storage battery and the second storage battery, the AC load be electrically connected with described inverter, described master controller for the electric energy that controls described solar photovoltaic assembly and send to described first storage battery or the second charge in batteries, described inverter is used for that the direct current in the first storage battery and the second storage battery is transformed into alternating current and uses for AC load.
Wherein, described first storage battery is connected with the first checkout gear, described first checkout gear is electrically connected with master controller, the first control switch is also provided with between described first storage battery and described first checkout gear, described first checkout gear is for detecting the charge acceptance of the first storage battery, when its charge acceptance is less than the supply of electrical energy of photovoltaic module, described first control switch disconnect, and described master controller send control command give the second storage battery charge.
Described second storage battery is connected with second detection device, described second detection device is electrically connected with master controller, the second control switch is also provided with between described second storage battery and described second detection device, described second detection device is for detecting the charge acceptance of the second storage battery, when its charge acceptance is less than the supply of electrical energy of photovoltaic module, described second control switch disconnect, and described master controller send control command give the first storage battery charge.Such first storage battery and the second storage battery can take turns current charge, avoid super-high-current to cause damage to storage battery, and can maximize the electric energy storing photovoltaic module and send.
The invention provides a kind of battery charging system of photovoltaic module, adopt two group storage batteries, photovoltaic module to two group storage battery wheel current charges, can imitate the useful life extending storage battery, and the resource of maximum using photovoltaic module.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.