CN211744054U - Energy storage bidirectional inverter - Google Patents
Energy storage bidirectional inverter Download PDFInfo
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- CN211744054U CN211744054U CN202020078951.1U CN202020078951U CN211744054U CN 211744054 U CN211744054 U CN 211744054U CN 202020078951 U CN202020078951 U CN 202020078951U CN 211744054 U CN211744054 U CN 211744054U
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Abstract
The utility model discloses a two-way dc-to-ac converter of energy storage belongs to the dc-to-ac converter, including the battery, tank circuit and inverter circuit, the battery respectively with tank circuit and inverter circuit electric connection, tank circuit and inverter circuit are connected with alternating current electric network, still include the DSP chip, ARM chip and BMS battery management circuit, the DSP chip is connected with BMS battery management circuit and ARM chip, BMS battery management circuit gathers the parameter of battery and sends for the DSP chip, the ARM chip is sent the parameter with the DSP chip, ARM chip and tank circuit and inverter circuit electric connection. The utility model discloses possess BMS battery management function, can monitor the battery situation, increase battery life.
Description
Technical Field
The utility model relates to an inverter technical field especially indicates a two-way inverter of energy storage.
Background
In the 'three north' area of China, new energy such as wind power and the like is abundant but the electricity consumption requirement is insufficient, local consumption is difficult, and in addition, the grid connection problem is difficult, and much electricity can only be abandoned in vain. The power abandon rate in some areas reaches more than 30 percent once. In the industry, an idea of accessing an energy storage system to solve a new energy consumption problem is always provided, but how to quickly respond and synchronously stabilize unpredictable new energy power fluctuation in a large-scale energy storage system, the industry needs to break through a plurality of key technical bottlenecks, and a high-power energy storage bidirectional inverter for bearing power conversion is one of the large-scale energy storage system.
Over the past few years, the focus of energy storage industry attention has been primarily on battery technology, the decline in battery prices, and the increase in energy storage capacity. Today the global energy storage industry continues to grow rapidly, in some geographic markets approaching maturity, and emphasis is also being shifted from battery hardware to components of the Energy Storage System (ESS), in particular the energy storage bidirectional inverter (PCS). Batteries are gradually becoming standardized common products, and the application of the energy storage bidirectional inverter PCS in the aspects of advanced system management and power grids is gradually increased.
The energy storage system can stabilize power grid fluctuation caused by new energy through controlled charging and discharging, and the effectiveness of the energy storage system is gradually approved by experts, scholars and the public. With the increasing expansion of new energy construction scale, the demand for large-scale electrochemical energy storage systems is urgent.
Most of the existing energy storage bidirectional inverters do not have the BMS battery management function, the consumption of the battery is increased, and the service life of the battery is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model provides a two-way inverter of energy storage has solved among the prior art two-way inverter of energy storage and has mostly not possessed BMS battery management function, increases the loss that the battery used, has reduced the life's of battery problem.
The technical scheme of the utility model is realized like this:
the utility model provides a two-way dc-to-ac converter of energy storage, includes battery, tank circuit and inverter circuit, the battery respectively with tank circuit and inverter circuit electric connection, tank circuit and inverter circuit are connected with alternating current electric network, still include DSP chip, ARM chip and BMS battery management circuit, the DSP chip with BMS battery management circuit and ARM chip are connected, BMS battery management circuit gathers the parameter of battery and send for the DSP chip, the DSP chip send the parameter for the ARM chip, the ARM chip with tank circuit and inverter circuit electric connection.
As a preferred embodiment of the utility model, the ARM chip still is connected with communication circuit, through communication circuit and the mutual data of host computer.
As a preferred embodiment of the utility model, the communication circuit includes RS485 communication circuit, GPRS/4G/5G communication circuit and CAN communication circuit.
As a preferred embodiment of the present invention, the storage battery is a lead-acid battery/lithium battery, and the rated voltage of the battery is 48V.
As a preferred embodiment of the utility model, still include the casing, battery, tank circuit and inverter circuit all fix in the casing.
As a preferred embodiment of the present invention, the power supply device further includes an input over/under voltage protection circuit and an output over/over current protection circuit, the input over/under voltage protection circuit is connected to the input terminal of the storage battery, and the output over/over current protection circuit is connected to the output terminal of the storage battery.
The beneficial effects of the utility model reside in that: possess BMS battery management function, can monitor the battery condition, increase battery life.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic block diagram of an embodiment of the energy storage bidirectional inverter of the present invention.
In the figure, 1-accumulator; 2-a tank circuit; 3-an inverter circuit; 4-DSP chip; 5-ARM chip; 6-BMS battery management circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the utility model provides a two-way dc-to-ac converter of energy storage, including battery 1, tank circuit 2 and inverter circuit 3, battery 1 respectively with tank circuit 2 and 3 electric connection of inverter circuit, tank circuit 2 and inverter circuit 3 are connected with alternating current network, still include DSP chip 4, ARM chip 5 and BMS battery management circuit 6, DSP chip 4 is connected with BMS battery management circuit 6 and ARM chip 5, BMS battery management circuit 6 gathers the parameter of battery 1 and gives DSP chip 4, DSP chip 4 sends the parameter for ARM chip 5, ARM chip 5 and tank circuit 2 and 3 electric connection of inverter circuit. The BMS battery management circuit 6 comprises analog signal acquisition (voltage and current) and switching value signal acquisition (temperature control switch), can monitor the battery condition, provides the optimal charging process and sets a proper charging and discharging proportion for the battery, prevents overshoot and the like, and prolongs the service life of the battery. The BMS management program (conventional technology) manages the battery 1 in the DSP chip 4. The utility model discloses a 5 combinations of DSP + ARM chip, the high price/performance ratio. High performance DSP chip 4 has guaranteed sampling precision and control accuracy, ensures the utility model discloses more reliable and stable, the inside various data of dc-to-ac converter are handled fast to the powerful ARM chip 5, control entire system operation.
The energy storage circuit 2 is used for converting alternating current of an alternating current power grid into direct current and storing electric energy into the storage battery 1, the inverter circuit 3 is used for converting the direct current of the storage battery 1 into alternating current and outputting the alternating current to a load, and the specific model of the inverter circuit can be set by a technician in a user-defined mode according to user requirements.
Grid output parameter (AC): rated output ac power (W): 3600; rated output voltage (V): 220, 220; grid frequency (Hz): 50/60, respectively; the total harmonic distortion is less than or equal to 5 percent; a Power Factor (PF) of 1 at rated power; the type of the power grid: a single phase.
Output parameters of the energy storage bidirectional inverter: rated output power (VA): 2300; rated output voltage (V): 220, 220; outputting a waveform: a sine wave; the total harmonic distortion is less than or equal to 5 percent.
And (3) battery and charging: the battery type: lead acid/lithium batteries; battery rated voltage (V): 48; battery voltage range (V): 40-60; charging curve: a 3-stage formula; overcurrent protection/overtemperature protection: YES/YES; maximum charge/discharge power (W): 2500/2500, respectively; maximum charge/discharge current (a): 50/50.
Maximum efficiency: 97.6 percent; MPPT efficiency: 99.9 percent; standby loss (W): < 7.
As a preferred embodiment of the utility model, ARM chip 5 still is connected with communication circuit, through communication circuit and the mutual data of host computer. Specifically, the communication circuit comprises an RS485 communication circuit, a GPRS/4G/5G communication circuit and a CAN communication circuit.
As a preferred embodiment of the present invention, the storage battery 1 is a lead-acid battery/lithium battery, and the rated voltage of the battery is 48V. Specifically, the solar charging system further comprises a shell, and the storage battery 1, the energy storage circuit 2 and the inverter circuit 3 are all fixed in the shell.
As a preferred embodiment of the present invention, the input overvoltage/undervoltage protection circuit and the output overvoltage/overcurrent protection circuit are further included, the input overvoltage/undervoltage protection circuit is connected to the input terminal of the battery 1, and the output overvoltage/overcurrent protection circuit is connected to the output terminal of the battery 1. The utility model discloses possess perfect protect function, input, under-voltage protection, output excessive pressure, overcurrent protection, ground fault control, reversal connection protection etc..
The utility model discloses possess BMS battery management function, can monitor the battery situation, increase battery life, powerful electric wire netting dispatch function realizes optimizing, energy-conserving dispatch, and furthest satisfies user's power consumption needs. When the power grid fails or is in power failure, the system also has an independent networking power supply function so as to improve the power supply safety of the load.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a two-way dc-to-ac converter of energy storage, includes battery, tank circuit and inverter circuit, the battery respectively with tank circuit and inverter circuit electric connection, tank circuit and inverter circuit are connected with alternating current electric network, its characterized in that still includes DSP chip, ARM chip and BMS battery management circuit, the DSP chip with BMS battery management circuit and ARM chip are connected, BMS battery management circuit gathers the parameter of battery and send for the DSP chip, the DSP chip with the parameter send for the ARM chip, the ARM chip with tank circuit and inverter circuit electric connection.
2. The energy storage bidirectional inverter of claim 1, wherein the ARM chip is further connected with a communication circuit, and data is interacted with an upper computer through the communication circuit.
3. The bidirectional inverter as claimed in claim 2, wherein the communication circuit comprises an RS485 communication circuit, a GPRS/4G/5G communication circuit and a CAN communication circuit.
4. An energy-storing bidirectional inverter as claimed in claim 1, wherein said battery is a lead-acid/lithium battery with a battery rated voltage of 48V.
5. The bidirectional inverter according to claim 1, further comprising a housing, wherein the battery, the tank circuit and the inverter circuit are all fixed in the housing.
6. An energy-storing bidirectional inverter according to claim 1, further comprising an input over/under voltage protection circuit and an output over/over current protection circuit, wherein the input over/under voltage protection circuit is connected with the input end of the storage battery, and the output over/over current protection circuit is connected with the output end of the storage battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020078951.1U CN211744054U (en) | 2020-01-14 | 2020-01-14 | Energy storage bidirectional inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020078951.1U CN211744054U (en) | 2020-01-14 | 2020-01-14 | Energy storage bidirectional inverter |
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| Publication Number | Publication Date |
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| CN211744054U true CN211744054U (en) | 2020-10-23 |
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| CN202020078951.1U Active CN211744054U (en) | 2020-01-14 | 2020-01-14 | Energy storage bidirectional inverter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114498570A (en) * | 2022-02-21 | 2022-05-13 | 西安奇点能源技术有限公司 | Energy storage battery protection device and protection method based on energy storage system |
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2020
- 2020-01-14 CN CN202020078951.1U patent/CN211744054U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114498570A (en) * | 2022-02-21 | 2022-05-13 | 西安奇点能源技术有限公司 | Energy storage battery protection device and protection method based on energy storage system |
| CN114498570B (en) * | 2022-02-21 | 2023-09-08 | 西安奇点能源股份有限公司 | Energy storage battery protection device and protection method based on energy storage system |
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