Electricity consumption metering device and power supply

Abstract

The application discloses an electric consumption metering device and a power supply device, and relates to the technical field of electric energy metering.The electric consumption metering device comprises a first metering module, a power supply switching module, a second metering module and a control module; the second end of an energy storage converter is coupled to a battery module; when the battery module is discharging, the control module controls the conduction between the third end and the fourth end of the power supply switching module, and controls the disconnection of the second end and the third end after a first set time; when the battery module is charging, the control module controls the conduction between the second end and the third end of the power supply switching module, and controls the disconnection of the third end and the fourth end after a second set time.Through the above mode, the first metering module and the second metering module are combined with the power supply switching module and the control module, the conduction relationship between different paths is combined with different on-off time sequences, the electric consumption metering of different load systems is realized, the error of energy efficiency calculation is avoided, and the continuity of power switching is ensured.

Description

Technical Field

[0001] This application relates to the field of electricity metering technology, and in particular to an electricity consumption metering device and a power supply device. Background Technology

[0002] Currently, energy storage cabinets generally adopt an integrated design of main energy storage unit and auxiliary system. The continuous operation of auxiliary equipment such as liquid cooling units, cooling fans, and dehumidifiers generates significant power loss. The overall energy efficiency, as a core technical indicator of energy storage cabinets, is usually calculated as the ratio of discharge capacity to charging capacity. In existing technologies, the auxiliary system is directly powered by the charging and discharging main circuit, and its energy consumption is included in the total electricity meter along with the charging and discharging capacity of the energy storage device (PACK). This makes it impossible to effectively separate auxiliary losses, resulting in a large error in energy efficiency calculation, with a deviation typically ≥3%. At the same time, it is impossible to monitor the real-time power consumption of auxiliary equipment independently, making it difficult to verify whether it meets the nominal rated power and increasing the risk of equipment overload operation. Summary of the Invention

[0003] The main objective of this application is to propose an electricity consumption metering device and a power supply unit, aiming to solve the problems found in traditional metering devices.

[0004] To achieve the above objectives, this application provides an electricity consumption metering device comprising: a first metering module, a first terminal of which is coupled to a first terminal of an energy storage converter, and a second terminal of which is coupled to a main load system; a power supply switching module, a first terminal of which is coupled to the first terminal of the energy storage converter, and a second terminal of which is coupled to an external power source; a second metering module, a first terminal of which is coupled to a third terminal of the power supply switching module, and a second terminal of which is coupled to an auxiliary load system; and a control module, a first terminal of which is coupled to the energy storage converter, and a second terminal of which is coupled to the power supply switching module; wherein, the second terminal of the energy storage converter is coupled to a battery module, and when the battery module is discharging, the control module controls the third and fourth terminals of the power supply switching module to conduct, and controls the second and third terminals to disconnect after a first set time; when the battery module is charging, the control module controls the second and third terminals of the power supply switching module to conduct, and controls the third and fourth terminals to disconnect after a second set time.

[0005] In one embodiment, the power supply switching module includes: a first switching unit, a first terminal of which is coupled to a first terminal of an energy storage converter, and a second terminal of which is coupled to a second metering module; and a second switching unit, a first terminal of which is coupled to an external power source, and a second terminal of which is coupled to the second metering module; wherein the control terminals of the first and second switching units are coupled to a control module; when the battery module supplies power, the control module controls the first switching unit to turn on, and the second switching unit to turn off after a first set time; when the external power source supplies power, the control module controls the second switching unit to turn on, and the first switching unit to turn off after a second set time.

[0006] In one embodiment, the first switching unit includes: a first switch, the first end of which is coupled to the live wire terminal of the first terminal of the energy storage converter, and the second end of which is coupled to the live wire terminal of the first terminal of the second metering module; and a second switch, the first end of which is coupled to the neutral wire terminal of the first terminal of the energy storage converter, and the second end of which is coupled to the neutral wire terminal of the first terminal of the second metering module; wherein the control terminals of both the first switch and the second switch are coupled to a control module.

[0007] In one embodiment, the second switching unit includes: a third switch, the first end of which is coupled to the live wire of an external power supply, and the second end of the first switch is coupled to the live wire of the first end of the second metering module; a fourth switch, the first end of which is coupled to the neutral wire of an external power supply, and the second end of the second switch is coupled to the neutral wire of the first end of the second metering module; wherein the control ends of the third switch and the fourth switch are both coupled to a control module.

[0008] In one embodiment, the power supply switching module further includes: a third switching unit, the first end of which is coupled to the first section of the energy storage converter, the second end of which is coupled to an external power supply, and the control end of which is coupled to a control module.

[0009] In one embodiment, the power consumption metering device further includes: an auxiliary switch module, a first terminal of the auxiliary switch module coupled to a second metering module, a second terminal of the auxiliary switch module coupled to an auxiliary load system, and a control terminal of the auxiliary switch module coupled to a control module.

[0010] In one embodiment, the power consumption metering device further includes: a current transformer module, the first end of which is coupled to the first end of the energy storage converter, the second end of which is coupled to an external power source, and the third end of which is coupled to the third end of the first metering module; wherein, the current transformer module collects the current direction between the energy storage converter and the external power source, and transmits it to the control module through the first metering module, and the control module determines whether the battery module is in a charging or discharging state based on the current direction.

[0011] In one embodiment, when the energy storage converter is in a standby state with zero power, the control module controls the second and third terminals of the power supply switching module to be connected, and controls the third and fourth terminals to be disconnected.

[0012] This application also proposes a power supply device comprising: a battery module; an energy storage converter, a first terminal of which is coupled to the battery module; an energy consumption metering device, a first terminal of which is coupled to a second terminal of the energy storage converter, and a second terminal of which is coupled to an external power source; a main load system, a main load system coupled to a third terminal of the energy consumption metering device; and an auxiliary load system, an auxiliary load system coupled to a fourth terminal of the energy consumption metering device; wherein the energy consumption metering device is the energy consumption metering device described in any of the embodiments above.

[0013] In one embodiment, the energy storage converter is a liquid-cooled energy storage converter, and the auxiliary load system includes a liquid-cooled unit coupled to the liquid-cooled energy storage converter.

[0014] The technical solution of this application adopts a combination of a first metering module and a second metering module, along with a power supply switching module and a control module. According to the different directions of the circuit power supply current, the power supply switching module is controlled to conduct different paths, and different metering schemes are switched for different power supply loads to accurately measure the power consumption of different systems and reduce metering errors. Furthermore, the continuity of power supply switching is achieved by controlling the switching timing of the paths. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the first embodiment of the power consumption metering device provided in this application.

[0017] Figure 2 This is a structural schematic diagram of the first embodiment of the power supply switching module provided in this application.

[0018] Figure 3 This is a structural schematic diagram of the second embodiment of the power supply switching module provided in this application.

[0019] Figure 4 This is a structural schematic diagram of the third embodiment of the power supply switching module provided in this application.

[0020] Figure 5This is a schematic diagram of the structure of the second embodiment of the power consumption metering device provided in this application.

[0021] Figure 6 This is a schematic diagram of the third embodiment of the power consumption metering device provided in this application.

[0022] Figure 7 This is a schematic diagram of the fourth embodiment of the power consumption metering device provided in this application.

[0023] Figure 8 This is a schematic diagram of an embodiment of the power supply device provided in this application.

[0024] Explanation of icon numbers: 100. Electricity consumption metering equipment; 1. First metering module; 2. Power supply switching module; 3. Second metering module; 4. Control module; 21. First switching unit; 22. Second switching unit; 23. Third switching unit; 5. Auxiliary switching module; 6. Current transformer module; 211. First switch; 212. Second switch; 221. Third switch; 222. Fourth switch; 200. Power supply unit; 210. Battery module; 220. Energy storage converter; 230. Main load system; 240. Auxiliary load system; 241. Liquid cooling unit.

[0025] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0029] Traditional front-mounted energy storage cabinets generally adopt an integrated design of "main energy storage unit + auxiliary load system". The continuous operation of auxiliary equipment such as liquid cooling units, cooling fans, and dehumidifiers generates significant energy loss, while the overall energy efficiency (energy efficiency = discharge capacity / charging capacity) is the core technical indicator of the energy storage cabinet. Existing technologies have the following key drawbacks: Confusion in energy consumption metering: The auxiliary load system is powered by the main charging and discharging circuit, and its energy consumption is included in the total electricity meter along with the charging and discharging capacity of the energy storage pack. Auxiliary losses cannot be separated, leading to errors in energy efficiency calculations (typically with a deviation ≥3%). Lack of equipment power consumption verification: The real-time power consumption of auxiliary equipment cannot be monitored independently, making it difficult to verify whether it meets the nominal rated power, increasing the risk of equipment overload. Lack of data for system optimization: The energy consumption proportion of the auxiliary load system is unclear, hindering power consumption optimization of the energy storage cabinet and equipment selection. Furthermore, the existing solution does not address the issue of power continuity during power supply switching.

[0030] Therefore, this application proposes an electricity consumption metering device and a power supply device to solve the above problems.

[0031] Please see Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of the first embodiment of the power consumption metering device provided in this application; the power consumption metering device 100 includes: a first metering module 1, a power supply switching module 2, a second metering module 3, and a control module 4.

[0032] Specifically, there is a first metering module 1, whose first end is coupled to the first end of the energy storage converter 220, and whose second end is coupled to the main load system 230; a power supply switching module 2, whose first end is coupled to the first end of the energy storage converter 220, and whose second end is coupled to an external power source; a second metering module 3, whose first end is coupled to the third end of the power supply switching module 2, and whose second end is coupled to the auxiliary load system 240; and a control module 4, whose first end is coupled to the energy storage converter 220, and whose second end is coupled to the power supply switching module 2; wherein, the second end of the energy storage converter 220 is coupled to the battery module 210. When the battery module 210 is discharging, the control module 4 controls the third and fourth ends of the power supply switching module 2 to conduct, and controls the second and third ends to disconnect after a first set time; when the battery module 210 is charging, the control module 4 controls the second and third ends of the power supply switching module 2 to conduct, and controls the third and fourth ends to disconnect after a second set time.

[0033] In one embodiment, both the first and second set times are 3 seconds, where the power consumption during the 3-second overlap is less than 0.1% and therefore negligible. That is, an interlocking relationship is formed between the second and third terminals of the power supply switching module 2, and between the third and fourth terminals of the power supply switching module 2, causing them to disconnect or connect at set intervals during the switching process. It is understood that the specific set times can be configured based on the actual situation of the solution.

[0034] The technical solution of this application adopts a combination of a first metering module 1 and a second metering module 3, along with a power supply switching module 2 and a control module 4. According to the different directions of the circuit power supply current, the power supply switching module 2 is controlled to conduct different paths, and different metering schemes are switched for different power supply loads to accurately measure the power consumption of different systems and reduce metering errors. Furthermore, the continuity of power supply switching is achieved by controlling the switching timing of the paths.

[0035] In one embodiment, such as Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of the first embodiment of the power supply switching module provided in this application; the power supply switching module 2 includes: a first switching unit 21 and a second switching unit 22.

[0036] Specifically, the first end of the first switching unit 21 is coupled to the first end of the energy storage converter 220, and the second end of the first switching unit 21 is coupled to the second metering module 3; the first end of the second switching unit 22 is coupled to an external power supply, and the second end of the second switching unit 22 is coupled to the second metering module 3; wherein, the control ends of the first switching unit 21 and the second switching unit 22 are coupled to the control module 4; when the battery module 210 supplies power, the control module 4 controls the first switching unit 21 to be turned on, and the second switching unit 22 to be turned off after a first set time; when the external power supply supplies power, the control module 4 controls the second switching unit 22 to be turned on, and the first switching unit 21 to be turned off after a second set time.

[0037] Understandably, in the above scheme, by using the first switch unit 21 and the second switch unit 22, the first switch 211 module is coupled to the energy storage converter 220, and the second switch 212 module is coupled to the external power supply, so as to switch the power supply to the auxiliary load system 240 according to different power supply methods.

[0038] In one embodiment, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of the second embodiment of the power supply switching module provided in this application; the first switching unit 21 includes: a first switch 211, the first end of the first switch 211 is coupled to the live wire terminal of the first end of the energy storage converter 220, and the second end of the first switch 211 is coupled to the live wire terminal of the first end of the second metering module 3; a second switch 212, the first end of the second switch 212 is coupled to the neutral wire terminal of the first end of the energy storage converter 220, and the second end of the second switch 212 is coupled to the neutral wire terminal of the first end of the second metering module 3; wherein, the control terminals of the first switch 211 and the second switch 212 are both coupled to the control module 4.

[0039] In one embodiment, such as Figure 3 As shown, the second switch unit 22 includes: a third switch 221, the first end of which is coupled to the live wire of an external power supply, and the second end of a first switch 211, which is coupled to the live wire of the first end of the second metering module 3; a fourth switch 222, the first end of which is coupled to the neutral wire of an external power supply, and the second end of a second switch 212, which is coupled to the neutral wire of the first end of the second metering module 3; wherein the control ends of the third switch 221 and the fourth switch 222 are both coupled to the control module 4.

[0040] In the above manner, the first switch 211, the second switch 212, the third switch 221, and the fourth switch 222 are used to couple the second metering module 3, the energy storage converter 220, and the live and neutral terminals of the external power supply port to perform individual circuit on / off control. By setting independent switches on the live and neutral circuits, the individual on / off control of the live and neutral wires can be achieved, which can realize complete power-off isolation of the power supply circuit and improve system safety, maintenance convenience, and fault handling reliability.

[0041] In one embodiment, such as Figure 4 As shown, Figure 4 This is a structural schematic diagram of the third embodiment of the power supply switching module provided in this application; the power supply switching module 2 also includes: a third switch 221 unit 23, the first end of the third switch 221 unit 23 is coupled to the first section of the energy storage converter 220, the second end of the third switch 221 unit 23 is coupled to an external power supply, and the control end of the third switch 221 unit 23 is coupled to the control module 4.

[0042] Understandably, by setting up the third switch 221 module, the power supply from the external power source to the main load system 230 and the battery module 210 can be controlled. This, in turn, controls the coupling path between the external power source and the system, isolates the coupling relationship with the external power source, and helps improve system safety and ease of maintenance.

[0043] In one embodiment, such as Figure 5 As shown, Figure 5 This is a schematic diagram of the structure of the second embodiment of the power consumption metering device provided in this application; the power consumption metering device 100 also includes an auxiliary switch module 5, the first end of the auxiliary switch module 5 is coupled to the second metering module 3, the second end of the auxiliary switch module 5 is coupled to the auxiliary load system 240, and the control end of the auxiliary switch module 5 is coupled to the control module 4.

[0044] Understandably, by setting up the auxiliary switch module 5, the on / off state of the path between the second metering module 3 and the auxiliary load system 240 is controlled, so as to control the access of auxiliary equipment, thereby realizing the separate metering of energy supply and power consumption of multiple auxiliary equipment or a single auxiliary equipment, so as to independently measure the energy consumption of auxiliary equipment during charging / discharging / standby.

[0045] In one embodiment, such as Figure 6 As shown, Figure 6This is a schematic diagram of the structure of the third embodiment of the power consumption metering device provided in this application; the power consumption metering device 100 further includes: a current transformer module 6, the first end of the current transformer module 6 is coupled to the first end of the energy storage converter 220, the second end of the current transformer module 6 is coupled to an external power supply, and the third end of the current transformer module 6 is coupled to the third end of the first metering module 1; wherein, the current transformer module 6 collects the current direction between the energy storage converter 220 and the external power supply, and transmits it to the control module 4 through the first metering module 1, and the control module 4 determines whether the battery module 210 is in a charging or discharging state according to the current direction.

[0046] By setting up the current transformer module 6, the corresponding current flow direction in the line is detected, and then it is determined whether the external power supply is charging the battery module 210 and supplying power to the device, or whether the battery module 210 is discharging externally and supplying power to the device, based on the current direction. According to the detection and judgment results, the corresponding path switching is controlled to complete the switching of power supply to the auxiliary load system 240.

[0047] In one embodiment, when the energy storage converter 220 is in a standby state with zero power, the control module 4 controls the second and third terminals of the power supply switching module 2 to be connected, and controls the third and fourth terminals to be disconnected.

[0048] Combining the above embodiments and... Figure 7 As shown, Figure 7 This is a schematic diagram of the fourth embodiment of the power consumption metering device provided in this application; see reference. Figure 7 To better understand the embodiments of this application, It should be noted that, in this embodiment, the first metering module 1 is ADL1. In a specific embodiment, ADL1 is a three-phase smart meter with a 380V voltage level, connected in parallel to the left side of QF01, and uses 485 communication to upload total charging and discharging power data. The second metering module 3 is ADL2. In a specific embodiment, ADL2 is a single-phase smart meter with a 220V voltage level, connected in series with MCB1, and uses 485 communication to upload auxiliary system power consumption data. The power supply switching module 2 includes: K1-K4 and QF01. In a specific embodiment, QF01 is a 250A molded case circuit breaker, located on the left side of the main circuit in the attached diagram, connected to the 380V power grid on the right and to the liquid-cooled PCS and energy storage pack on the left. K1-K4 are 220V AC time-delay relays (relay group in the attached diagram). K1 / K2 are connected to the right side of QF01 (power grid side), K3 / K4 are connected to the discharge terminal of the Pack, and the output terminal is connected in parallel to MCB1. Auxiliary switch module 5 includes MCB1. In one specific embodiment, MCB1 is a 63A miniature circuit breaker (see attached auxiliary power branch switch), with its output connected to auxiliary system equipment such as liquid chiller unit 241 and dehumidifier. Current transformer module 6 includes CT1-CT4. In one specific embodiment, CT1-CT4 are 200A / 5A current transformers, installed on the left side of the main circuit of QF01, with their output connected to the EMS current acquisition interface.

[0049] Additionally, it should be noted that in one embodiment, the control module 4 is an EMS, specifically connected to ADL1 / ADL2 via a 485 bus, receiving CT1, CT2, and CT3 signals and outputting relay control commands; the energy storage converter 220 is a PCS. The EMS (Energy Management System) is the control center and decision-making core of the energy storage system, a smart management platform combining hardware and software, responsible for global optimization and scheduling. The PCS (Power Conversion System, energy storage converter 220 / bidirectional inverter) is the core of energy conversion between the energy storage system and the grid / load, realizing AC / DC bidirectional conversion, acting as both the "executor" and the "bridge."

[0050] In one embodiment of the solution in this application, a liquid-cooled PCS (without a built-in air-cooling system, the heat dissipation energy consumption is borne by the liquid-cooled unit 241) is adapted, and the logic for each operating condition is as follows: 1. Charging period (grid → Pack): CT1, CT2, and CT3 collect current in the "negative direction". When EMS receives the meter data, it sends a closing command to K1 and K2 (K1 and K2 are immediately connected, and the auxiliary system is connected to the power grid side).

[0051] EMS sends a disconnect command to K3 and K4, and K3 and K4 disconnect after a 3-second delay.

[0052] ADL1 measures “the amount of electricity charged from the grid to the Pack”, and ADL2 measures “the amount of electricity consumed by the grid during the charging period for auxiliary systems (such as liquid-cooled unit 241).

[0053] 2. Discharge period (Pack → Power grid): CT1, CT2, and CT3 collect current in the "positive" direction. After receiving the meter data, EMS first sends a closing command to K3 and K4 (K3 and K4 are immediately connected, and the auxiliary system is connected to the Pack discharge terminal).

[0054] EMS immediately sends disconnect commands to K1 and K2, and K1 and K2 disconnect after a 3-second delay.

[0055] The percentage of power supplied during the 3-second overlap is less than 0.1%, which can be ignored.

[0056] ADL1 measures the "total amount of power discharged from the Pack to the grid", and ADL2 measures the "power consumption of the Pack by the auxiliary system during the discharge period". 3. Standby period: When the PCS is in 0-power standby mode, the EMS controls K1 and K2 to close and K3 and K4 to open, the auxiliary system is powered by the grid, and ADL2 separately measures the standby energy consumption.

[0057] As is understood, the Pack described above refers to battery module 210, and the power grid is an external power source. The external power source can also be diesel generator, thermal power generator, wind power generator, solar power generator, etc., without specific limitations here.

[0058] Through the above methods, the energy consumption of the auxiliary system and the main charging and discharging power are metered separately, ensuring that the overall energy efficiency calculation deviation is ≤0.5%, meeting the high-precision energy efficiency assessment requirements of the energy storage system. For the optimized design of the liquid-cooled PCS, the heat dissipation energy consumption is transferred to the liquid-cooled unit 241 and metered independently, filling the technical blind spot where the heat dissipation energy consumption of the air-cooled PCS cannot be measured. A 3-second disconnection delay relay with a "first-on, then-off" logic is adopted to prevent power outages in the auxiliary system during power supply switching, ensuring power supply continuity and operational stability. The power consumption of auxiliary equipment such as the liquid-cooled unit 241 can be monitored in real time, verifying its consistency with the nominal rated power and reducing the risk of equipment overload. Simultaneously, the energy consumption ratio of the auxiliary system under different operating conditions is clearly defined, providing accurate data support for energy storage cabinet power consumption optimization, equipment selection, and system energy efficiency improvement.

[0059] This application also proposes a power supply device 200, such as... Figure 8 As shown, Figure 8 This is a schematic diagram of an embodiment of the power supply device provided in this application; the power supply device 200 includes a battery module 210; an energy storage converter 220; an energy consumption metering device 100; a main load system 230; and an auxiliary load system 240.

[0060] Specifically, the first end of the energy storage converter 220 is coupled to the battery module 210; the first end of the power consumption metering device 100 is coupled to the second end of the energy storage converter 220, and the second end of the power consumption metering device 100 is coupled to an external power source; the main load system 230 is coupled to the third end of the power consumption metering device 100; and the auxiliary load system 240 is coupled to the fourth end of the power consumption metering device 100. The power consumption metering device 100 is the same as described in any of the above embodiments. The specific structure of the power consumption metering device 100 is as described in the above embodiments. Since this power supply device 200 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0061] In one embodiment, such as Figure 8 As shown, the energy storage converter 220 is a liquid-cooled energy storage converter 220, and the auxiliary load system 240 includes a liquid-cooled unit 241, which is coupled to the liquid-cooled energy storage converter 220.

[0062] Understandably, there is a blind spot in the measurement of heat dissipation energy consumption in the traditional solution. The heat dissipation energy consumption of the traditional air-cooled PCS is integrated inside the PCS and cannot be measured separately. If a liquid-cooled PCS is used instead, the heat dissipation energy consumption is transferred to the liquid-cooled unit 241, but the current design still does not achieve independent measurement of the energy consumption of the liquid-cooled unit 241.

[0063] Therefore, in the above embodiment, the energy storage converter 220 is set as a liquid-cooled energy storage converter 220, and optimized for the liquid-cooled energy storage converter 220. The liquid-cooled unit 241 is set in the auxiliary load system 240 and independently metered by the second metering module 3. This addresses the problem that in traditional equipment, when an air-cooled energy storage converter 220 is used, energy consumption cannot be metered separately; and also addresses the problem that there is no separate metering for the liquid-cooled energy storage converter 220.

[0064] In the embodiments of this application, the first metering module 1 and the second metering module 3 are combined with the power supply switching module 2 and the control module 4 to control the power supply switching module 2 to conduct different paths according to the different directions of the circuit power supply current. Different metering schemes are switched to correspond to different power supply loads to accurately measure the power consumption of different systems and reduce metering errors. The continuity of power supply switching is achieved by controlling the switching timing of the path switching.

[0065] The above are merely exemplary embodiments of this application and do not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. An electricity consumption metering device, characterized in that, The power consumption metering device includes: A first metering module, the first end of the first metering module is coupled to the first end of the energy storage converter, and the second end of the first metering module is coupled to the main load system; A power supply switching module, wherein the first end of the power supply switching module is coupled to the first end of the energy storage converter, and the second end of the power supply switching module is coupled to an external power source; The second metering module has a first terminal coupled to the third terminal of the power supply switching module and a second terminal coupled to the auxiliary load system. A control module, wherein a first terminal of the control module is coupled to the energy storage converter, and a second terminal of the control module is coupled to the power supply switching module; The second terminal of the energy storage converter is coupled to the battery module. When the battery module is discharging, the control module controls the third and fourth terminals of the power supply switching module to conduct, and controls the second and third terminals to disconnect after a first set time. When the battery module is charging, the control module controls the second and third terminals of the power supply switching module to conduct, and controls the third and fourth terminals to disconnect after a second set time.

2. The power consumption metering device as described in claim 1, characterized in that, The power supply switching module includes: A first switching unit, the first end of which is coupled to the first end of the energy storage converter, and the second end of which is coupled to the second metering module; The second switching unit has a first end coupled to the external power supply and a second end coupled to the second metering module. The control terminals of the first switch unit and the second switch unit are coupled to the control module. When the battery module supplies power, the control module controls the first switch unit to turn on, and the second switch unit to turn off after a first set time. When the external power supply supplies power, the control module controls the second switch unit to turn on, and the first switch unit to turn off after a second set time.

3. The power consumption metering device as described in claim 2, characterized in that, The first switching unit includes: A first switch, the first end of which is coupled to the live wire of the first end of the energy storage converter, and the second end of which is coupled to the live wire of the first end of the second metering module; The second switch has a first end coupled to the neutral terminal of the first end of the energy storage converter, and a second end coupled to the neutral terminal of the first end of the second metering module. The control terminals of both the first switch and the second switch are coupled to the control module.

4. The power consumption metering device as described in claim 2, characterized in that, The second switching unit includes: The third switch has a first end coupled to the live wire of the external power supply, and the second end of the first switch is coupled to the live wire of the first end of the second metering module. The fourth switch has its first end coupled to the neutral wire of the external power supply, and the second end of the second switch is coupled to the neutral wire of the first end of the second metering module. The control terminals of the third switch and the fourth switch are both coupled to the control module.

5. The power consumption metering device as described in claim 2, characterized in that, The power supply switching module also includes: The third switching unit has a first terminal coupled to the first section of the energy storage converter, a second terminal coupled to the external power supply, and a control terminal coupled to the control module.

6. The power consumption metering device as described in claim 1, characterized in that, The power consumption metering device also includes: An auxiliary switch module, wherein a first terminal of the auxiliary switch module is coupled to the second metering module, a second terminal of the auxiliary switch module is coupled to the auxiliary load system, and a control terminal of the auxiliary switch module is coupled to the control module.

7. The power consumption metering device as described in claim 1, characterized in that, The power consumption metering device also includes: A current transformer module, wherein the first end of the current transformer module is coupled to the first end of the energy storage converter, the second end of the current transformer module is coupled to the external power supply, and the third end of the current transformer module is coupled to the third end of the first metering module. The current transformer module collects the current direction between the energy storage converter and the external power source, and transmits it to the control module through the first metering module. The control module determines whether the battery module is in a charging or discharging state based on the current direction.

8. The power consumption metering device as described in claim 1, characterized in that, When the energy storage converter is in a standby state with zero power, the control module controls the second and third terminals of the power supply switching module to be connected, and controls the third and fourth terminals to be disconnected.

9. A power supply device, characterized in that, The power supply device includes: Battery module; An energy storage converter, wherein a first terminal of the energy storage converter is coupled to the battery module; An electricity consumption metering device, wherein a first end of the electricity consumption metering device is coupled to a second end of the energy storage converter, and the second end of the electricity consumption metering device is coupled to an external power source; A main load system, wherein the main load system is coupled to the third terminal of the power consumption metering device; An auxiliary load system, wherein the auxiliary load system is coupled to the fourth terminal of the power consumption metering device; The power consumption metering device is the power consumption metering device as described in any one of claims 1-8.

10. The power supply device as described in claim 9, characterized in that, The energy storage converter is a liquid-cooled energy storage converter, and the auxiliary load system includes a liquid-cooled unit, which is coupled to the liquid-cooled energy storage converter.

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