Electric energy efficiency detection device of energy storage system

Abstract

The utility model discloses an electric energy efficiency detection device of an energy storage system, which comprises a circuit board. A DC electric energy meter; a single-phase AC electric energy meter; a display control device; the single-chip microcomputer is in communication connection with the three-phase alternating-current electric energy meter, the direct-current electric energy meter, the single-phase alternating-current electric energy meter and the display and control equipment, calculates the electricity consumption of each part of the energy storage cabinet and the charging and discharging conversion efficiency of the energy storage cabinet according to the voltage value, the current value, the power value and the electric energy value measured by the electric energy meters, and transmits the electricity consumption and the charging and discharging conversion efficiency to the display and control equipment; and the wire outlet end of the switching power supply is respectively connected with the display control equipment and the single chip microcomputer. The device comprises multiple types of electricity meters, can measure the electricity consumption of different parts in the energy storage cabinet, generates a chart through display control equipment, and is convenient to adjust operation parameters, programs or the models of all the parts so as to improve the conversion efficiency and the energy storage income.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric quantity detection, specifically is a kind of energy storage system electric energy efficiency detection device. BACKGROUND

[0002] With the increasing installation capacity of lithium ion electrochemical energy storage industry in the country and even the whole world and the increasing proportion in electric power energy, users pay more and more attention to the charge-discharge conversion efficiency of energy storage products and the energy consumption of products themselves, specifically which product components consume more power, and how to maximize their own benefits.

[0003] In the actual application process of energy storage products, generally two types of electric meters are installed. One is an anti-backflow electric meter to prevent the energy storage cabinet from backflowing to the network, and the other is an electric meter installed at the grid-connected point of the energy storage cabinet to measure the total electric energy value data change of the energy storage cabinet during charging and discharging or standby. Users can only see the voltage value, current value, charge-discharge power and power value collected from the metering electric meter on the EMS or display control device of the energy storage product, but cannot see the self-consumption of each main component of the energy storage product, the charge-discharge conversion efficiency and the benefit size.

[0004] For users of large-capacity energy storage power stations, they can create their own cloud platform or rent a third-party cloud platform of energy storage enterprises to collect charge-discharge data of energy storage products through 4G and related communication protocols, and then use the edited program to display the charging capacity, discharging capacity, charge-discharge conversion efficiency and benefit of the energy storage product in any time period on the cloud platform. This method has high capital cost, and the self-consumption of each main component of the energy storage product cannot be seen.

[0005] For small-capacity users, they will send someone to copy the meter to record the forward total active electric energy value, reverse total active electric energy value and each peak valley period positive and negative electric energy value data, and then according to the latest release of each season by the State Grid, the corresponding different electricity price, finally through computer EXCEL or manual calculation to obtain the energy storage benefit of this period, and then calculate the charge-discharge conversion efficiency of the energy storage product according to the formula. This method can only roughly estimate the total power consumption of the product, and cannot see the specific power consumption of each main component of the product. Moreover, the meter reading and calculation process is complicated, consumes a lot of time, and is prone to errors.

[0006] No matter existing EMS display control equipment, cloud platform or dedicated person meter reading, they cannot measure and calculate the self power consumption of each main part of the energy storage product due to limited number of electric meters and imperfect related functions. Without understanding of the self power consumption of the energy storage product in actual operation, the user cannot adjust part of the operation setting parameters of the product according to the self power consumption of each part to reduce the self power consumption of the product, cannot make improvement in improving the income, the energy storage enterprise cannot observe which part of the product has large power consumption in the long-term operation of the product, cannot adjust the brand, model, specification of the corresponding part of the product, setting parameters and program strategy in time, and cannot minimize the self power consumption of the product, maximize the conversion efficiency and maximize the energy storage income in the actual operation of the product.

[0007] In addition, the existing electric meters, EMS display control equipment, cloud platform and the like in the market also have many defects, and cannot completely realize providing a set of economical, intelligent and convenient and simple device for a single small capacity energy storage product to meet all the above requirements. Content of the utility model

[0008] In order to overcome the defects in the prior art, the utility model provides a kind of energy storage system electric energy efficiency detection device, and the device includes multiple electric meters: three-phase alternating current electric meter, direct current electric meter and single-phase alternating current electric meter, can measure the power consumption of different parts in the operation of energy storage cabinet, and can generate chart or trend curve by display control equipment. It is convenient for the user and the energy storage enterprise to continuously adjust the equipment operation parameters, equipment operation program or the specification of the parts of the equipment to reduce the self loss of energy storage equipment, improve conversion efficiency and energy storage income.

[0009] To achieve the above purpose, the utility model adopts the technical scheme that a kind of energy storage system electric energy efficiency detection device, comprising:

[0010] Circuit board;

[0011] Three-phase alternating current electric meter, the three-phase alternating current electric meter is detachably installed on the circuit board;

[0012] Direct current electric meter, the direct current electric meter is detachably installed on the circuit board;

[0013] Single-phase alternating current electric meter, the single-phase alternating current electric meter is detachably installed on the circuit board;

[0014] Display control equipment, the display control equipment is detachably installed on the circuit board;

[0015] A single-chip microcomputer is detachably mounted on the circuit board, and the single-chip microcomputer and the three-phase AC energy meter, the DC energy meter, the single-phase AC energy meter, and the display control device are in communication connection, the single-chip microcomputer stores the voltage value, the current value, the power value, and the electric energy value measured by the three-phase AC energy meter, the DC energy meter, and the single-phase AC energy meter in a register, and calculates the power consumption of each component of the energy storage cabinet and the charging and discharging conversion efficiency according to the voltage value, the current value, the power value, and the electric energy value, and transmits the calculation result to the display control device.

[0016] A switching power supply is connected with the display control device and the single-chip microcomputer.

[0017] According to the above technical scheme, the three-phase AC energy meter, the DC energy meter, and the single-phase AC energy meter are respectively connected to different components of the energy storage cabinet, so as to measure the power consumption of different components in the energy storage cabinet during operation, and a chart or a trend curve can be generated by the display control device, which facilitates the user and the energy storage enterprise to continuously adjust the equipment operation parameters, the equipment operation program, or the specifications of the components of the equipment, so as to reduce the self-loss power consumption of the energy storage equipment, improve the conversion efficiency, and increase the energy storage income.

[0018] Further, when the energy storage system electric energy efficiency detection device is used, the three-phase AC energy meter is connected with the AC incoming line side of the energy storage cabinet.

[0019] The DC energy meter is connected with the DC battery cluster of the energy storage cabinet.

[0020] The single-phase AC energy meter is connected with the liquid cooling unit, the power supply, and the cooling fan of the energy storage cabinet.

[0021] The total voltage value, the current value, the power value, and the electric energy value of the charging and discharging of the entire energy storage cabinet are measured by the three-phase AC energy meter.

[0022] The DC voltage value, the current value, the power value, and the electric energy value of the battery are measured by the DC energy meter.

[0023] The voltage value, the current value, the power value, and the electric energy value of the liquid cooling unit, the power supply, and the cooling fan are measured by the single-phase AC energy meter.

[0024] The single-chip microcomputer calculates the power consumption and the conversion efficiency of the entire energy storage cabinet and each component according to the above data, such as:

[0025] The power consumption of the entire energy storage cabinet is calculated according to the total voltage value, the current value, the power value, and the electric energy value of the charging and discharging of the entire energy storage cabinet measured by the three-phase AC energy meter.

[0026] The power consumption of the battery is calculated according to the DC voltage value, the current value, the power value, and the electric energy value of the battery measured by the DC energy meter.

[0027] The voltage value, current value, power value and electric energy value of the liquid cooling unit, uninterruptible power supply and cooling fan measured by the single-phase alternating current energy meter are used to calculate the power consumption of the liquid cooling unit, uninterruptible power supply and cooling fan.

[0028] The power consumption of the energy storage cabinet components PCS can be obtained by subtracting the power consumption of the battery, liquid cooling unit, uninterruptible power supply and cooling fan from the overall power consumption of the energy storage cabinet.

[0029] Further, a three-phase alternating current value transformer is also included, which is connected with the three-phase alternating current energy meter. When measuring the current value and voltage value using the three-phase alternating current energy meter, the cable to be measured is passed through the three-phase alternating current value transformer.

[0030] Further, a single-phase direct current value transformer is also included, which is connected with the direct current energy meter. When measuring the current value and voltage value using the direct current energy meter, the cable to be measured is passed through the single-phase direct current value transformer.

[0031] The current value transformer is an instrument that converts a large current value on the primary side into a small current value on the secondary side according to the principle of electromagnetic induction. The three-phase alternating current value transformer and the single-phase direct current value transformer in the present application are used to protect the three-phase alternating current energy meter and the direct current energy meter, avoiding the measured current value exceeding the range.

[0032] Further, the three-phase alternating current energy meter, direct current energy meter and single-phase alternating current energy meter are configured with RS485 communication parameter addresses and baud rates, and are in communication connection with the RS485 port of the single-chip microcomputer. Through RS485 serial communication, the three-phase alternating current energy meter, direct current energy meter and single-phase alternating current energy meter transmit the measured voltage value, current value, power value, electric energy value, positive and negative total active energy value in each period of peak and valley, etc. to the single-chip microcomputer in real time, and the single-chip microcomputer stores the data in the register for backup.

[0033] Further, the three-phase alternating current energy meter, direct current energy meter and single-phase alternating current energy meter are connected with the RS485 port of the single-chip microcomputer through a shielded cable. The single-chip microcomputer is connected with the three-phase alternating current energy meter, direct current energy meter and single-phase alternating current energy meter through a shielded cable, avoiding the influence of the magnetic field generated during the operation of the energy storage cabinet on data transmission.

[0034] Further, the single-chip microcomputer and the Ethernet port of the display control device are connected through a network cable, and the single-chip microcomputer and the display control device communicate through a TCP / IP communication protocol.

[0035] Further, a budget program is arranged on the single-chip microcomputer, and the single-chip microcomputer calculates the power consumption of each component of the energy storage cabinet every interval of a preset time.

[0036] Further, a PVC wire slot is arranged on the circuit board.

[0037] Through the above technical solutions, the beneficial effects of the present application are as follows:

[0038] 1. The energy storage system electric energy efficiency detection device disclosed in the present application comprises a plurality of electric meters, i.e., a three-phase alternating current electric energy meter, a direct current electric energy meter and a single-phase alternating current electric energy meter, which can measure the power consumption of different components in the energy storage cabinet during operation, and can generate a chart or a trend curve through the display control device, thereby facilitating users and energy storage enterprises to adjust equipment operation parameters, equipment operation programs or specifications of each component of the equipment, so as to reduce the self-loss power of the energy storage equipment, improve the conversion efficiency and energy storage income.

[0039] 2. The present application can calculate the required data according to different requirements, and set a configuration picture on the display control device according to the requirements, which is more economical and flexible than building or renting a cloud platform, and can reduce calculation errors and improve the reliability and efficiency of data calculation compared with manual meter reading calculation.

[0040] In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0042] Fig. 1It is a line connection diagram of the energy storage system electric energy efficiency detection device in the embodiment of the utility model;

[0043] Fig. 2 It is a line connection diagram of the energy storage system electric energy efficiency detection device and the energy storage cabinet connection in the embodiment of the utility model.

[0044] The above figure reference signs: 1, three-phase AC electric energy meter; 2, DC electric energy meter; 3, first single-phase AC electric energy meter; 4, second single-phase AC electric energy meter; 5, fifth single-phase AC electric energy meter; 6, single-chip microcomputer; 7, HMI display control equipment; 8, 24V switching power supply; 9, third switch 9; 10, first switch; 11, second switch; 12, energy storage cabinet. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0046] It should be noted that, in the description of the utility model, the terms "first", "second" and the like are only used for description purposes and to distinguish similar objects, and there is no sequence between the two, nor can it be understood as indicating or implying relative importance. In addition, in the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0047] Embodiment: combined Figs. 1-2 As shown in the figure, the embodiment discloses an energy storage system electric energy efficiency detection device, comprising:

[0048] The circuit board is provided with a PVC wire slot, and the PVC wire slot is used for accommodating the cable connected with each device.

[0049] The circuit board is provided with a PVC wire slot, and the PVC wire slot is used for accommodating the cable connected with each device.

[0050] The three-phase AC electric energy meter 1 is connected with a three-phase AC current value mutual inductor, and the DC electric energy meter 2 is connected with a single-phase DC current value mutual inductor. The three-phase AC current value mutual inductor and the single-phase DC current value mutual inductor are instruments for converting the primary side large current value into the secondary side small current value according to the electromagnetic induction principle. The three-phase AC current value mutual inductor and the single-phase DC current value mutual inductor are used for protecting the three-phase AC electric energy meter 1 and the DC electric energy meter 2, so as to avoid that the measured current value exceeds the range.

[0051] The RS485 communication parameter address and baud rate are configured on the three-phase alternating current energy meter 1, the direct current energy meter 2, the first single-phase alternating current energy meter 3, the second single-phase alternating current energy meter 4 and the fifth single-phase alternating current energy meter 5 respectively, and the RS485 ports of the three-phase alternating current energy meter 1, the direct current energy meter 2, the first single-phase alternating current energy meter 3, the second single-phase alternating current energy meter 4, the fifth single-phase alternating current energy meter and the single-chip microcomputer 6 are connected through a shielded cable, so that the single-chip microcomputer 6 can be connected with the three-phase alternating current energy meter 1, the direct current energy meter 2, the first single-phase alternating current energy meter 3, the second single-phase alternating current energy meter 4 and the fifth single-phase alternating current energy meter through the shielded cable, and the magnetic field generated during the operation of the energy storage cabinet 12 can be avoided to affect the data transmission.

[0052] The three-phase alternating current energy meter 1, the direct current energy meter 2, the first single-phase alternating current energy meter 3, the second single-phase alternating current energy meter 4 and the fifth single-phase alternating current energy meter can transmit the measured voltage value, current value, power value, energy value, positive and negative total active energy value and other data of each period of peak, valley and flat to the single-chip microcomputer 6 in real time through the RS485 serial communication mode, and the single-chip microcomputer 6 stores the data in the register for standby.

[0053] The single-chip microcomputer 6 and the HMI display control device 7 are connected with the 24V switching power supply 8, and the 24V switching power supply 8 is used to convert the 220V alternating current into 24V direct current to supply power to the single-chip microcomputer 6 and the HMI display control device 7.

[0054] The outgoing line end of the 24V switching power supply 8 is connected with the single-chip microcomputer 6 and the HMI display control device 7 respectively, the incoming line end of the 24V switching power supply 8 is connected with the outgoing line end of the third switch 9, the incoming line end of the third switch 9 is connected with the outgoing line end of the first switch 10, and the incoming line end of the first switch 10 is used to connect with the power supply. The outgoing line end of the first switch 10 is also connected with the incoming line end of the second switch 11, and the outgoing line end of the second switch 11 is connected with the power supply interface of the direct current energy meter 2.

[0055] The closing of the first switch 10 represents that the upper openings of the second switch 11 and the third switch 9 are powered on, and the opening of the first switch 10 represents that the upper openings of the second switch 11 and the third switch 9 are powered off.

[0056] After the first switch 10 and the second switch 11 are both closed, the second switch 11 supplies power to the direct current energy meter 2, the screen of the direct current energy meter 2 is lighted, and the voltage value data can be displayed; after the second switch 11 is opened, the direct current energy meter 2 is powered off, the screen of the direct current energy meter 2 is turned off, and no data is displayed.

[0057] The first switch 10 and the third switch 9 are closed, and the third switch 9 provides 220V AC power for the 24V switching power supply 8; the 24V switching power supply 8 converts the 220V AC power into 24V DC power for the single-chip microcomputer 6 and the HMI display control device 7.

[0058] When the energy storage system electric energy efficiency detection device is used, the three-phase AC electric energy meter 1 and the AC incoming line side of the energy storage cabinet 12 are connected, and the total voltage value, current value, power value and electric energy value of the overall charging and discharging of the energy storage cabinet 12 are measured by the three-phase AC electric energy meter;

[0059] The DC electric energy meter 2 and the DC battery cluster of the energy storage cabinet 12 are connected, and the DC voltage value, current value, power value and electric energy value of the battery are measured by the DC electric energy meter;

[0060] The first single-phase AC electric energy meter 3 and the liquid cooling unit of the energy storage cabinet 12 are connected, and the DC voltage value, current value, power value and electric energy value of the liquid cooling unit are measured by the first single-phase AC electric energy meter 3;

[0061] The second single-phase AC electric energy meter 4 and the uninterruptible power supply of the energy storage cabinet 12 are connected, and the DC voltage value, current value, power value and electric energy value of the uninterruptible power supply are measured by the second single-phase AC electric energy meter 4;

[0062] The fifth single-phase AC electric energy meter 5 and the cooling fan of the energy storage cabinet 12 are connected, and the DC voltage value, current value, power value and electric energy value of the cooling fan are measured by the fifth single-phase AC electric energy meter 5.

[0063] The single-chip microcomputer 6 calculates the power consumption and conversion efficiency of the overall energy storage cabinet 12 and each component according to the above data.

[0064] The total voltage value, current value, power value and electric energy value of the overall charging and discharging of the energy storage cabinet 12 measured by the three-phase AC electric energy meter 1 are used to calculate the power consumption of the overall energy storage cabinet 12;

[0065] The DC voltage value, current value, power value and electric energy value of the battery measured by the DC electric energy meter 2 are used to calculate the power consumption of the battery;

[0066] The DC voltage value, current value, power value and electric energy value of the liquid cooling unit measured by the first single-phase AC electric energy meter 3 are used to calculate the power consumption of the liquid cooling unit;

[0067] The DC voltage value, current value, power value and electric energy value of the uninterruptible power supply measured by the second single-phase AC electric energy meter 4 are used to calculate the power consumption of the uninterruptible power supply;

[0068] The DC voltage value, current value, power value and electric energy value of the cooling fan measured by the fifth single-phase AC electric energy meter 5 are used to calculate the power consumption of the cooling fan;

[0069] The power consumption of the energy storage cabinet 12 as a whole minus the power consumption of the battery, liquid cooling unit, uninterruptible power supply and cooling fan can obtain the power consumption of the energy storage cabinet component PCS.

[0070] The calculation method of the charging and discharging conversion efficiency of the energy storage cabinet 12 is that the single-chip microcomputer 6 calculates the total power W consumed by charging the energy storage cabinet 12 from zero power to full power according to the data measured by the three-phase AC energy meter 1 冲 , the single-chip microcomputer 6 calculates the total power W provided by discharging the energy storage cabinet 12 from full power to zero power according to the data measured by the three-phase AC energy meter 1 放 , and the charging and discharging conversion efficiency of the energy storage cabinet is W 放 ÷W 冲 .

[0071] It can be understood that, since the liquid cooling unit, power supply, cooling fan and other devices in the energy storage cabinet 12 need to be powered continuously, W 放 is always less than W 冲 , that is, the charging and discharging conversion efficiency of the energy storage cabinet 12 cannot reach 100%. However, users can observe the real-time power consumption of each component in the energy storage cabinet 12 according to the energy storage system electric energy efficiency detection device provided in the present application, so as to adjust the device operation parameters, device operation program or specifications of each component of the device according to the real-time power consumption of each component, so as to reduce the self-loss power of the energy storage device, improve the conversion efficiency and energy storage benefit.

[0072] The single-chip microcomputer 6 is provided with a budget program, and the single-chip microcomputer 6 calculates the power consumption of each component of the energy storage cabinet 12 in each preset time interval. Optionally, the preset time interval can be any time interval set by the user, such as every second, every minute, every hour, etc.

[0073] The Ethernet port of the single-chip microcomputer 6 and the HMI display control device 7 is connected through a network cable, and the single-chip microcomputer 6 and the HMI display control device 7 communicate through TCP / IP communication protocol. The single-chip microcomputer 6 transmits the calculated data to the HMI display control device 7 through TCP / IP communication protocol, and the HMI display control device 7 displays the data in the form of charts, curves, etc. so that users can understand the power situation of the energy storage device in real time and clearly, including the charging and discharging conversion efficiency of the energy storage cabinet 12 and the power consumption of each main component of the energy storage cabinet 12.

[0074] The principle and implementation mode of the present application are described by using specific examples, and the above examples are only used to help understand the method and core idea of the present application; meanwhile, for those skilled in the art, the specific implementation mode and application range will be changed according to the idea of the present application, and the above description should not be understood as a limitation on the present application.

Claims

1. An energy storage system electric energy efficiency detection device, characterized in that, The circuit board is detachably mounted with: a three-phase AC electric energy meter; a DC electric energy meter; a single-phase AC electric energy meter; a display control device; a single-chip microcomputer, which is connected with the three-phase AC electric energy meter, the DC electric energy meter, the single-phase AC electric energy meter and the display control device respectively to obtain voltage value, current value, power value and electric energy value, and stores the voltage value, the current value, the power value and the electric energy value in the single-chip microcomputer, and calculates the electricity consumption of each component of the energy storage cabinet and the charging and discharging conversion efficiency of the energy storage cabinet according to the voltage value, the current value, the power value and the electric energy value, and transmits the calculation results to the display control device; a switching power supply, whose outgoing line is connected with the display control device and the single-chip microcomputer.

2. The energy storage system electric energy efficiency detection apparatus of claim 1, wherein, When the energy storage system electric energy efficiency detection device is used, the three-phase AC electric energy meter is connected with the AC incoming line side of the energy storage cabinet; the DC electric energy meter is connected with the DC battery cluster of the energy storage cabinet; the single-phase AC electric energy meter is connected with the liquid cooling unit, the power supply and the cooling fan of the energy storage cabinet respectively.

3. The energy storage system electric energy efficiency detection apparatus of claim 2, wherein, The three-phase AC current value transformer is further included, which is connected with the three-phase AC electric energy meter, and when the three-phase AC electric energy meter is used to measure the current value and the voltage value, the cable to be measured is passed through the three-phase AC current value transformer.

4. The energy storage system electric energy efficiency detection apparatus of claim 2, wherein, The single-phase DC current value transformer is further included, which is connected with the DC electric energy meter, and when the DC electric energy meter is used to measure the current value and the voltage value, the cable to be measured is passed through the single-phase DC current value transformer.

5. The energy storage system electric energy efficiency detection apparatus of claim 1, wherein, The three-phase AC electric energy meter, the DC electric energy meter and the single-phase AC electric energy meter are configured with communication parameter address and baud rate, and are connected with the port of the single-chip microcomputer in communication.

6. The energy storage system electric energy efficiency detection apparatus of claim 5, wherein, The three-phase AC electric energy meter, the DC electric energy meter and the single-phase AC electric energy meter are connected with the port of the single-chip microcomputer through a shielded cable.

7. The energy storage system electric energy efficiency detection apparatus of claim 1, wherein, The Ethernet port of the single-chip microcomputer and the display control device is connected through a network cable, and the single-chip microcomputer and the display control device are communicated through TCP / IP communication protocol.

8. The energy storage system electric energy efficiency detection apparatus of claim 1, wherein, The single-chip microcomputer is provided with a budget program, and the single-chip microcomputer calculates the electricity consumption of each component of the energy storage cabinet in each preset time interval.

9. The energy storage system electric energy efficiency detection apparatus of claim 1, wherein, The circuit board is provided with a PVC wire slot.

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