CN208209539U - A variety of secondary cell parallel connection energy storage devices - Google Patents

A variety of secondary cell parallel connection energy storage devices Download PDF

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Publication number
CN208209539U
CN208209539U CN201820236218.0U CN201820236218U CN208209539U CN 208209539 U CN208209539 U CN 208209539U CN 201820236218 U CN201820236218 U CN 201820236218U CN 208209539 U CN208209539 U CN 208209539U
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module
battery
variety
discharge
energy storage
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林金芳
黄华宾
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Guangdong Tongshun Energy Technology Development Co ltd
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Guangzhou Hongquan Energy Technology Co Ltd
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Abstract

The utility model discloses a variety of secondary cell parallel connection energy storage devices, rectifier and inverter including connecting power grid;At least two groups charge-discharge controller being connected in parallel between rectifier conjunction inverter, each charge-discharge controller are connected with a secondary battery;Wherein charge-discharge controller includes the total current voltage acquisition module for acquiring 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 total current voltage acquisition module and monomer data acquisition module;The CPU module of connection interface module;The charging module of CPU module is connected, the charging module includes the first pwm circuit;The discharge module of CPU module is connected, the discharge module includes the second pwm circuit.The secondary battery parallel connection energy storage that multichannel difference battery types, different capabilities or different voltages grade may be implemented in the utility model uses.

Description

A variety of secondary cell parallel connection energy storage devices
Technical field
The utility model relates to direct current system field more particularly to a variety of secondary cell parallel connection energy storage devices.
Background technique
In the power system, since there are electricity consumption paddy peak difference phenomenons, in peak times of power consumption, total electricity is not enough to meet simultaneously Commercial power and household electricity and cause certain customers' electricity consumption impacted, in the low power consumption phase, electricity surplus then must shut off portion Distribute motivation, has a big chunk energy in this process and be consumed and waste.Therefore excellent using secondary battery Charging/discharging function stores the energy having more than needed in power grid, discharges in peak of power consumption, and grid power production is maintained to disappear with electric power The balance of consumption can effectively improve efficiency, maintain the healthy and stable operation of power grid.With the appearance of renewable energy And development, develop energy storage technology, establishing energy-storage system just becomes more important.And the core of energy-storage system is exactly large-scale two Primary cell.
In energy-storage system, since design capacity is larger, the capacity of one group of battery is often inadequate, so either selecting lead Acid accumulator or nickel-cadmium cell generally use the mode of secondary battery parallel connection.However battery have in use it is unbalanced Property, the lack of uniformity of each single battery can be accumulated as the lack of uniformity of battery pack, and end voltage when battery pack being made to charge is unequal. In constant-voltage charge state, it may appear that the current difference alienation of batteries in parallel connection group keeps the level of charge of secondary battery different, aggravation The lack of uniformity of battery pack.In constant-current charge state, hold the lower battery pack charging current of voltage big, the electrolyte of battery pack Temperature increases, and internal resistance becomes smaller, and increases charging current further, and form vicious circle.It is this damage with accelerated mode into Row is the inertial defect that direct secondary cell in parallel can not overcome.
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.
Detailed description of the invention
Fig. 1 is a variety of secondary cell parallel connection energy storage device structure schematic diagrams of the utility model;
Fig. 2 is the single charge-discharge controller structure principle chart between the A-B point in Fig. 1;
Fig. 3 is application principle figure of the utility model in uninterruptible power system.
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.

Claims (5)

  1. More than 1. kinds of secondary cell parallel connection energy storage device, which is characterized in that 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-discharge controller It is 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.
  2. 2. a variety of secondary cell parallel connection energy storage devices as described in claim 1, which is characterized in that the interface module is connected with Input unit is used for typing battery parameter information.
  3. 3. a variety of secondary cell parallel connection energy storage devices as described in claim 1 or claim 2, which is characterized in that described to connect Mouth mold block is connected with display device, for showing output battery charging and discharging capacity, charged state and discharge condition information.
  4. 4. a variety of secondary cell parallel connection energy storage devices as described in claim 1, which is characterized in that each in the secondary battery A battery variety is consistent, brand is consistent and internal resistance is consistent.
  5. 5. a variety of secondary cell parallel connection energy storage devices as described in claim 1, which is characterized in that the battery variety includes simultaneously It is not limited to lead-acid accumulator, nickel-metal hydride battery, ickel-cadmium cell, lithium ion battery, fuel cell and lead carbon battery.
CN201820236218.0U 2018-02-09 2018-02-09 A variety of secondary cell parallel connection energy storage devices Active CN208209539U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112202160A (en) * 2020-10-20 2021-01-08 国网四川省电力公司电力科学研究院 Direct-hanging bus type energy storage control system and control method
CN118100355A (en) * 2024-02-02 2024-05-28 河北奥冠电源有限责任公司 Quick charging technology based on lead-carbon battery and battery management system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112202160A (en) * 2020-10-20 2021-01-08 国网四川省电力公司电力科学研究院 Direct-hanging bus type energy storage control system and control method
CN112202160B (en) * 2020-10-20 2022-06-03 国网四川省电力公司电力科学研究院 Direct-hanging bus type energy storage control system and control method
CN118100355A (en) * 2024-02-02 2024-05-28 河北奥冠电源有限责任公司 Quick charging technology based on lead-carbon battery and battery management system

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Effective date of registration: 20240226

Address after: Room 1031, Building H6, No. 39 Ruihe Road, Huangpu District, Guangzhou City, Guangdong Province, 510700, Room 1040, Building H6

Patentee after: Guangdong Tongshun Energy Technology Development Co.,Ltd.

Country or region after: China

Address before: Room 342, No. 161 Tianfu Road, Tianhe District, Guangzhou City, Guangdong Province, 510630

Patentee before: GUANGZHOU HONGQUAN ENERGY TECHNOLOGY Co.,Ltd.

Country or region before: China

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