Utility model content
The problem of for energy-storage system, can be with the utility model proposes a variety of secondary cell parallel connection energy storage devices
Parallel multiplex different type, capacity, the secondary battery of voltage class carry out reliable management of charging and discharging, expand energy-storage system
Design capacity.
The technical solution of the utility model is achieved in that
A variety of secondary cell parallel connection energy storage devices, including
Connect the rectifier and inverter of power grid;
At least two groups charge-discharge controller being connected in parallel between the rectifier conjunction inverter, each charge and discharge control dress
It sets and is all connected with a secondary battery;Wherein
The charge-discharge controller includes
For acquiring the total current voltage acquisition module of secondary battery total current and total voltage;
For acquiring the monomer data acquisition module of the voltage of single battery, internal resistance and temperature information in secondary battery;
Connect the interface module of the total current voltage acquisition module and monomer data acquisition module;
Connect the CPU module of the interface module;
The charging module of the CPU module is connected, the charging module includes the first pwm circuit;With
The discharge module of the CPU module is connected, the discharge module includes the second pwm circuit.
Further, the interface module is connected with input unit, is used for typing battery parameter information.
Further or further, the interface module is connected with display device, for showing output battery charge and discharge
Capacitance, charged state and discharge condition information.
Further, each battery variety is consistent in the secondary battery, brand is consistent and internal resistance is consistent.
Further, the battery variety includes being not limited to lead-acid accumulator, nickel-metal hydride battery, ickel-cadmium cell, lithium ion
Battery, fuel cell and lead carbon battery.
The beneficial effects of the utility model are that compared with prior art, a variety of secondary cells of the utility model are in parallel
The realization of energy storage device can be used for uninterruptible power system, power as backup power source when alternating current interrupts for DC load;
Simultaneously the discharge current of secondary battery can reasonably be distributed, wanted meeting bearing power according to the power of load
While asking, the power supply of maximum duration is carried out.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Figure 1 and Fig. 2, a variety of secondary cell parallel connection energy storage devices, including
Connect the rectifier and inverter of power grid;
At least two groups charge-discharge controller being connected in parallel between the rectifier conjunction inverter, each charge and discharge control dress
It sets and is all connected with a secondary battery;Wherein
The charge-discharge controller includes
For acquiring the total current voltage acquisition module of secondary battery total current and total voltage;
For acquiring the monomer data acquisition module of the voltage of single battery, internal resistance and temperature information in secondary battery;
Connect the interface module of the total current voltage acquisition module and monomer data acquisition module;
Connect the CPU module of the interface module;
The charging module of the CPU module is connected, the charging module includes the first pwm circuit;
The discharge module of the CPU module is connected, the discharge module includes the second pwm circuit.
Wherein, the battery information that the CPU module can be inputted by interface module, is filled using the first PWM circuit control
Charging voltage of the electric module to battery, the load information that can be inputted by interface module, using the control electric discharge of the second pwm circuit
Module booster circuit adjusts the discharge voltage of battery to required same voltage class.CPU module is the same as to electric current collected, electricity
The signals such as pressure, temperature are handled, and realize the accurate control to the voltage/current of cell charging/discharging.
The interface module of the charge-discharge controller is connected with input unit, completes battery parameter by interface module
The input of information, the display and data output function of battery real-time status.Battery variety, amount of monomer, monomer can be inputted
The essential informations such as nominal capacity, monomer nominal voltage, load voltage range, can export battery charging and discharging capacity, charged state,
The information such as discharge condition;
Secondary cell concatenated for same group, it is desirable that type, brand is identical, and internal resistance good capacitance consistency avoids charging
Occur in the process because single battery difference greatly caused by failure, series-connected cell amount of monomer is unlimited.
It has no effect between secondary battery, the secondary cell of variety classes, different brands or different capabilities can be simultaneously
Connection uses.Charge-discharge controller controls the charging/discharging voltage of battery using pwm circuit, therefore different voltages grade
Secondary cell also can be used in parallel.Battery variety includes being not limited to lead-acid accumulator, nickel-metal hydride battery, ickel-cadmium cell, lithium ion
Battery, fuel cell, lead carbon battery etc..
The utility model secondary cell parallel connection energy storage device can be according to the capacity status of each secondary battery, to each secondary
The discharge current of battery pack is reasonably distributed, to meet the demand of the power of load.
Rectifier at direct current, provides the AC conversion in power grid to DC voltage in the low power consumption phase for energy-storage system
It charges.Electricity in peak times of power consumption, secondary battery is changed into alternating current by inverter and returns to power grid.With energy storage
For parallel connection N (N=3) organizes secondary battery in system, then there are 3 autonomous systems to be connected in parallel to the DC output end of rectifier, it is whole
The DC output voltage of stream device should be slightly above the maximum value of the charging voltage of 3 autonomous systems.The composition of 3 autonomous systems and it is
System is provided that
1,2V500Ah valve-regulated lead-acid battery 108,1 set of charge-discharge controller, 1 total voltage current acquisition mould
Block, 108 monomer voltage current acquisition modules form autonomous system 1;The parameter setting of charge-discharge controller are as follows: battery variety
It is set as 1 (1 represents lead-acid accumulator);Amount of monomer is set as 108;Monomer nominal capacity is set as 500Ah;Monomer is nominally electric
Pressure is set as 2V;Discharge current is set as 50A (calculating of 10 hour rates), and load voltage is set as 240V.
2,2V300Ah valve-regulated lead-acid battery 108,1 set of charge-discharge controller, 1 total voltage current acquisition mould
Block, 108 monomer voltage current acquisition modules form autonomous system 2;The parameter setting of charge-discharge controller are as follows: battery variety
It is set as 1 (1 represents lead-acid accumulator);Amount of monomer is set as 108;Monomer nominal capacity is set as 300Ah;Monomer is nominally electric
Pressure is set as 2V;Discharge current is set as 30A (calculating of 10 hour rates), and load voltage is set as 240V.
3,3.2V400Ah lithium ion battery 65,1 set of charge-discharge controller, 1 total voltage current acquisition module, 65
Monomer voltage current acquisition module forms autonomous system 3.The parameter setting of charge-discharge controller are as follows: battery variety is set as
2 (2 represent lithium ion battery);Amount of monomer is set as 65;Monomer nominal capacity is set as 400Ah;The setting of monomer nominal voltage
For 3.2V;Discharge current is set as 40A (calculating of 10 hour rates), and load voltage is set as 240V.
Charge-discharge controller is separately connected rectifier output end and inverter input terminal and corresponding secondary battery;
Access group total voltage current acquisition module between charge-discharge controller and secondary battery;Each monomer data collecting module collected
It is connected in parallel on the pole of battery cell.
The battery cell nominal voltage and monomer that CPU module in the utility model can be inputted by interface module
Quantity is adjusted charging voltage of the charging module to battery using the first pwm circuit circuit.As having 10 in autonomous system 1
A disadvantage monomer is not available, and needs to reject, then after 10 disadvantage monomers being disconnected will remaining 98 battery cells connect after
It is continuous to use.The setting of the amount of monomer of charge and discharge control module should be changed to 98 at this time.CPU module can determine that this is secondary automatically
The safe float charge voltage of battery pack be 218.5V, even charging voltage 230.3V, and send instruction to the first pwm circuit module into
Row controls to adjust the charging voltage of current secondary battery pack, without making any adjustments to rectifier.And each secondary battery
In single battery quantity change, have no effect to other secondary batteries.
What the CPU module in a variety of secondary cell parallel connection energy storage devices of the utility model can be inputted by interface module
Load information is adjusted the discharge voltage of battery to required same using the second pwm circuit circuit control discharge module booster circuit
One voltage class.Such as when the total voltage in autonomous system 1 after single battery quantity is reduced is 218.5V, then CPU module is sent
Instruction controls the second pwm circuit module to make voltage rise to 240V.
Other secondary batteries are equally referred to the above method and are operated.
Another situation, as shown in figure 3, the realization of a variety of secondary cell parallel connection energy storage devices of the utility model can be used for
Uninterruptible power system is powered as backup power source when alternating current interrupts for DC load.It can be right according to the power of load
The discharge current of secondary battery is reasonably distributed, and while meeting load power demand, carries out the confession of maximum duration
Electricity.
During reality is practical, the realization of a variety of secondary cell parallel connection energy storage devices, the design of charge-discharge modules needs to consider two
The power requirement of requirement and the load of the voltage and current of primary cell group, needs to consider Redundancy Design in design.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the protection scope of the utility model.