CN113949147A - Lithium battery energy storage main control system based on redundant double auxiliary power supplies - Google Patents
Lithium battery energy storage main control system based on redundant double auxiliary power supplies Download PDFInfo
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- CN113949147A CN113949147A CN202110898573.0A CN202110898573A CN113949147A CN 113949147 A CN113949147 A CN 113949147A CN 202110898573 A CN202110898573 A CN 202110898573A CN 113949147 A CN113949147 A CN 113949147A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
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Abstract
The invention provides a lithium battery energy storage main control system based on redundant double auxiliary power supplies, which relates to the field of lithium battery energy storage control and comprises a first power module and a second power module which are arranged in parallel, a two-in one-out parallel control loop connected with the output ends of the first power module and the second power module, and a load connected with the output ends of the two-in one-out parallel control loop; the input end of the first power module is connected to a first power source, and the input end of the second power module is connected to a second power source. The invention aims to ensure that the lithium battery energy storage main control system can work normally when a single power supply fails by adding another group of power modules for supplying power when the single power supply fails, and in addition, a group of two-in one-out parallel control loop is designed by self to manage and control the input power sources in order to ensure that two groups of power sources are connected in parallel or any group of power modules are not influenced mutually when the power sources are output.
Description
Technical Field
The invention relates to the field of lithium battery energy storage control, in particular to a lithium battery energy storage master control system based on redundant double auxiliary power supplies.
Background
At present, an auxiliary power supply framework of a lithium Battery energy storage (i.e., BMS) main control System generally provides a normal dc power supply for a load by a power module, wherein the load includes a printed circuit board (i.e., PCB) and a RELAY (i.e., RELAY), and a power source at an input end of the power module generally adopts a high voltage Battery for internal power supply or an ac 220V ac power supply, please refer to fig. 1.
The lithium battery energy storage main control system adopts a single power source in the aspect of auxiliary power supply, and the power source of the lithium battery energy storage main control system is selected from high-voltage battery internal power supply or alternating current 220V alternating current power supply in order to reduce the system cost, so that the lithium battery energy storage main control system fails due to no working voltage when the power source fails or cannot supply power.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present invention is to provide a lithium battery energy storage main control system based on redundant dual auxiliary power supplies, which is used to solve the problem of auxiliary power supply in the lithium battery energy storage main control system in the prior art.
The invention provides a lithium battery energy storage main control system based on redundant double auxiliary power supplies, which comprises a first power module and a second power module which are arranged in parallel, and a load connected with the first power module and the second power module; the input end of the first power module is connected to a first power source, and the input end of the second power module is connected to a second power source.
In an embodiment of the invention, the system includes a two-in one-out parallel control loop, an input end of the two-in one-out parallel control loop is connected to output ends of the first power module and the second power module, and an output end of the two-in one-out parallel control loop is connected to the load.
In an embodiment of the invention, the two-in one-out parallel control loop includes a first diode and a second diode arranged in parallel, an anode of the first diode is connected to the first power source, an anode of the second diode is connected to the second power source, and cathodes of the first diode and the second diode are connected to the load.
In an embodiment of the invention, the two-in one-out parallel control loop includes a first PMOS transistor connected in parallel with the first diode, a second PMOS transistor connected in parallel with the second diode, and a detection and driving circuit connected in parallel with the first PMOS transistor and the second PMOS transistor.
In an embodiment of the invention, the second power module is configured in an isolated manner, and the voltage range of the second power source is 18-72V.
In an embodiment of the invention, the second power source is a battery power input, a dc power input or a photovoltaic power input.
As described above, the lithium battery energy storage main control system based on the redundant double auxiliary power supplies has the following beneficial effects:
1. because lithium battery energy storage major control system need long-time uninterrupted duty, and lithium battery energy storage major control system is many sets of lithium battery energy storage system and connects in parallel the use at present, breaks away from parallelly connected because of auxiliary power supply trouble when taking place one of them lithium battery energy storage system, can aggravate other lithium battery energy storage system loads at this moment and accelerate other lithium battery energy storage systems because of the off-line of overload, consequently adopts dual supply to supply and makes redundant formula framework for lithium battery energy storage major control system has higher stability.
2. In order to realize smooth switching and protection of the power module in the dual-power mode during parallel power supply, the power supply quality is realized and guaranteed by arranging the two-in one-out parallel control loop, the loop loss is reduced by the two-in one-out parallel control loop, and the efficiency value is improved.
Drawings
Fig. 1 shows a frame diagram of an auxiliary power supply of a lithium battery energy storage master control system disclosed in the prior art.
Fig. 2 is a diagram illustrating an auxiliary power supply architecture of the lithium battery energy storage master control system disclosed in the embodiment of the invention.
Fig. 3 is a schematic diagram illustrating an auxiliary power supply structure of a lithium battery energy storage master control system disclosed in an embodiment of the present invention.
Reference numerals:
1-a first source of electrical power; 2-a first power module; 3-loading; 4-a second source of electrical power; 5-a second power module; 6-two-in one-out parallel control loop, 6.1-first diode, 6.2-second diode, 6.3-first PMOS tube, 6.4-second PMOS tube, and 6.5-detection and drive circuit.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Referring to fig. 2, the present invention provides a redundant dual auxiliary power supply-based lithium battery energy storage main control system, which includes a first power module 2 and a second power module 5 connected in parallel, a two-in one-out parallel control loop 6 connected to output ends of the first power module 2 and the second power module 5, and a load 3 connected to an output end of the two-in one-out parallel control loop 6; the input end of the first power module 2 is connected to a first power source 1, and the input end of the second power module 5 is connected to a second power source 4.
The invention improves the power redundancy by adding a group of power modules, can ensure that the lithium battery energy storage main control system can normally work when a single power source fails, and in addition, in order to ensure the power supply priority of the two groups of power modules in the simultaneous working process and prevent the two groups of power modules from being in a parallel state to influence each other for use when any damage and short circuit fault occur, a two-in one-out parallel control loop 6 is arranged to manage and control the two groups of power modules.
Specifically, the second power module 5 is in an isolated configuration, and the voltage range connected to the second power source 4 is 18-72V, wherein the second power source 4 may be a battery power input, a dc power input, or a photovoltaic power input.
The invention has specific selection requirements on the added power modules, and the added power modules need to meet the requirement that the voltage input range is 18-72V, so that the voltage of a 24-48V battery, the voltage of a 24-48V direct current and the voltage of a 30V/(300-350W) photovoltaic can be directly input as power sources, and the diversity and the stability of the power sources are further improved; and the added power module needs to meet the isolated design, so that the interference of an Energy Management System (EMS) to the System can be effectively reduced.
Referring to fig. 3, the two-in-one-out parallel control loop 6 includes a first diode 6.1 and a second diode 6.2 arranged in parallel, an anode of the first diode 6.1 is connected to the first power source 1, an anode of the second diode 6.2 is connected to the second power source 4, and cathodes of the first diode 6.1 and the second diode 6.2 are connected to the load 3.
Two groups of power modules are respectively connected into a two-in one-out parallel control loop 6 through an input end interface g1 and an input end interface g2, so that the power supply is connected; after the power supply is connected, the first diode 6.1 and the second diode 6.2 which are arranged in the forward direction are supplied with power through the output port g3, and the advantages of the two-in one-out parallel control loop 6 are as follows:
(1) by utilizing the diode one-way conduction principle, the output control of the power modules cannot be influenced when the two groups of power modules work simultaneously.
(2) When any one of the power modules connected with the input interface g1 and the input interface g2 has a short-circuit fault, another group of power modules can be blocked from having a short-circuit fault in succession by a unidirectional diode.
(3) When any one of the power modules connected with the input end interface g1 and the input end interface g2 is powered down and no output is generated, the other group of power modules can be supplemented immediately without switching time.
(4) When the power modules connected with the input end interface g1 and the input end interface g2 work normally, the priority power supply function can be realized by adjusting the output voltage of the power modules, namely, the output of the power modules is only required to be adjusted up by 0.7-1V, and the priority power supply function is generated through natural pressure difference between the power modules.
However, since the diode generates a fixed forward voltage difference in one direction, a large power self-loss is generated when a large current power acts, and the diode may be damaged when the diode is poorly cooled, so that the problem that the power consumption of the diode is large due to a large current in the power module is solved by providing the first PMOS transistor 6.3 and the second PMOS transistor 6.4.
Specifically, the two-in one-out parallel control loop 6 includes a first PMOS transistor 6.3 connected in parallel with the first diode 6.1, a second PMOS transistor 6.4 connected in parallel with the second diode 6.2, and a detection and driving circuit 6.5 connected in parallel with the first PMOS transistor 6.3 and the second PMOS transistor 6.4.
According to the invention, a first PMOS tube 6.3 is connected in parallel with a first diode 6.1, a second PMOS tube 6.4 is connected in parallel with a second diode 6.2, and finally, after voltage is collected at positions f1, f2 and f3 in a loop through a detection and drive circuit 6.5, the first diode 6.1 is controlled to be connected in parallel and the second diode 6.2 is connected in parallel to open the first PMOS tube 6.3 and the second PMOS tube 6.4 through comparison logic, so that the diode loss is reduced by the advantage of lower input impedance after the MOS tube is started, and the control is as follows:
(1) when the voltage at the f1 position is greater than the voltage at the f3 position, the detection and drive circuit 6.5 controls the first PMOS transistor 6.3 to be turned on and connected in parallel with the first diode 6.1, and at this time, the power supply mode is normal working, and the power consumption of the first diode 6.1 is reduced after the first PMOS transistor 6.3 is turned on;
(2) when the voltage at the f1 position is greater than the voltage at the f3 position, the detection and driving circuit 6.5 controls the first PMOS transistor 6.3 to be turned off and connected in parallel with the first diode 6.1, and the power supply mode is an abnormal operation power supply mode, so that the power is outputted in one direction through the first diode 6.1;
(3) the opening and closing of the other group of second PMOS tubes 6.4 are compared and controlled by the voltages of the f2 position and the f2 position to be the same as those of the second PMOS tube 6.4.
In summary, when the single power supply mode fails, the lithium battery energy storage main control system can be ensured to work normally by adding another group of power modules for supplying power; in addition, in order to ensure that the two groups of power supply sources are connected in parallel or any group of power supply sources outputs, the power supply modules are not influenced mutually, and a group of two-in one-out parallel control loop 6 is designed by self to manage and control the input power sources. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. The utility model provides a lithium cell energy storage major control system based on two auxiliary power supply of redundant formula which characterized in that: the system comprises a first power module, a second power module and a load, wherein the first power module and the second power module are arranged in parallel; the input end of the first power module is connected to a first power source, and the input end of the second power module is connected to a second power source.
2. The lithium battery energy storage main control system based on the redundant double auxiliary power supplies of claim 1, characterized in that: the system comprises a two-in one-out parallel control loop, wherein the input end of the two-in one-out parallel control loop is connected with the output ends of a first power module and a second power module, and the output end of the two-in one-out parallel control loop is connected with a load.
3. The lithium battery energy storage main control system based on the redundant double auxiliary power supplies of claim 2, characterized in that: the two-in one-out parallel control loop comprises a first diode and a second diode which are arranged in parallel, wherein the anode of the first diode is connected to a first power source, the anode of the second diode is connected to a second power source, and the cathodes of the first diode and the second diode are connected with a load.
4. The lithium battery energy storage main control system based on the redundant double auxiliary power supplies of claim 3, characterized in that: the two-in one-out parallel control loop comprises a first P-MOS tube connected with the first diode in parallel, a second PMOS tube connected with the second diode in parallel, and a detection and drive circuit connected with the first PMOS tube and the second PMOS tube in parallel.
5. The lithium battery energy storage main control system based on the redundant double auxiliary power supplies of claim 1, characterized in that: the second power module is arranged in an isolation mode, and the voltage range of the connected second power source is 18-72V.
6. The lithium battery energy storage main control system based on the redundant double auxiliary power supplies of claim 5, wherein: the second power source may be a battery power input, a direct current power input, or a photovoltaic power input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110898573.0A CN113949147A (en) | 2021-08-05 | 2021-08-05 | Lithium battery energy storage main control system based on redundant double auxiliary power supplies |
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| CN202110898573.0A CN113949147A (en) | 2021-08-05 | 2021-08-05 | Lithium battery energy storage main control system based on redundant double auxiliary power supplies |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116455048A (en) * | 2023-06-14 | 2023-07-18 | 宁德时代新能源科技股份有限公司 | Redundant power supply circuit and power supply device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116455048A (en) * | 2023-06-14 | 2023-07-18 | 宁德时代新能源科技股份有限公司 | Redundant power supply circuit and power supply device |
| CN116455048B (en) * | 2023-06-14 | 2024-05-31 | 宁德时代新能源科技股份有限公司 | Redundant power supply circuit and power supply device |
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