A dual-circuit shared battery online capacity verification device

Abstract

The present invention provides a dual-circuit shared online capacity verification device for batteries, comprising a human-machine interaction module, a communication unit, a control unit, and an online capacity verification circuit unit connected in sequence; the online capacity verification circuit unit simultaneously connects the working circuits of the first battery group and the second battery group of two voltage levels, and performs an online capacity verification mode test on the first battery group and / or the second battery group under the control of the control unit; the human-machine interaction module is used to issue a test instruction of the online capacity verification mode to the control unit, and the test instruction is transmitted to the control unit by the communication unit; the communication unit is also connected to the online capacity verification circuit unit to transmit the voltage and current data of the battery and the capacity verification test data. This solves the problem of high capacity verification cost in the current case where there are battery groups of two voltage levels in the switchgear and substation at the same time, and is safe and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of battery maintenance, in particular to an online battery capacity verification device. Background Art

[0002] The DC power supply system is an important part of the switchgear and substation, providing the working voltage for the DC power equipment in the switchgear and substation. As an energy storage device, the battery has become one of the core systems of the DC power supply system due to its unique performance. As a backup power supply, it provides stable power when the main power supply is interrupted or the voltage is unstable. Therefore, regular capacity verification testing of the battery pack is an indispensable part of daily maintenance.

[0003] In the power system, in order to meet different load requirements and system design considerations, substations and machine rooms may have both 220V and -48V battery packs. 220V battery packs are usually used for larger power systems, such as the main control power supply of switchgear and substations, while -48V battery packs may be used for communication equipment or other auxiliary systems.

[0004] The battery capacity test under such a DC system is very troublesome, and it is often necessary to install and arrange two sets of capacity test devices with different voltage levels, which has high requirements on the installation environment and spatial layout of the battery room, and is not economical. At the same time, the traditional battery capacity test requires a set of spare batteries to be connected to the DC system, and then the battery group to be tested is removed and the charge and discharge test is performed manually. The entire test process is accompanied by multiple battery group connection and removal operations, which has certain operational risks.

[0005] Therefore, there is an urgent need for a nuclear capacity technology that belongs to the field of online nuclear capacity, has higher safety, and can be used for battery packs of two different voltage levels to solve the above problems. Summary of the invention

[0006] In view of this, the technical problem to be solved by the present invention is to provide an online capacity verification device for dual-circuit shared batteries, which solves the problems of power supply reliability, safety hazards and high capacity verification cost during the capacity verification process when there are battery groups of two voltage levels in the current switchgear and substation.

[0007] To achieve the above-mentioned purpose of the invention, the technical solution adopted by the embodiment of the present invention is: a dual-circuit shared online battery capacity evaluation device, comprising a human-computer interaction module, a communication unit, a control unit and an online capacity evaluation circuit unit connected in sequence;

[0008] The online capacity-reducing circuit unit is connected to the working circuits of the first battery group and the second battery group of two voltage levels at the same time, and performs an online capacity-reducing mode test on the first battery group and / or the second battery group under the control of the control unit, wherein the online capacity-reducing mode includes a dual-channel shared direct-connected floating charging mode of the first battery group and the second battery group, a single-channel capacity-reducing discharge mode of the first battery group or the second battery group, and a single-channel pre-charging mode of the first battery group or the second battery group;

[0009] The human-computer interaction module is used to issue a test instruction of the online core capacity mode to the control unit, and the test instruction is transmitted to the control unit by the communication unit;

[0010] The communication unit is also connected to the online capacity control circuit unit for transmitting the voltage and current data of the battery, capacity test data, system status information, fault and alarm information.

[0011] Furthermore, the online core capacity circuit unit further includes a DCDC module, a dummy load discharge module, a plurality of relays K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, online diode modules D1 and D2, two normally closed contactors KM1 and KM2, and two circuit breakers QF1 and QF2;

[0012] The DCDC module is connected to the online positive terminal of the first battery pack through K7 and K1, and to the positive terminal of the first battery pack through K8 and K2; connected to the online positive terminal of the second battery pack through K8 and K4, and to the positive terminal of the second battery pack through K8 and K5;

[0013] One end of the dummy load discharge module is connected to the DCDC module, and connected to the positive terminal of the first battery pack through K9 and K2; connected to the positive terminal of the second battery pack through K9 and K5; connected to the online positive terminal of the first battery pack through K10 and K4; connected to the online positive terminal of the first battery pack through K10, K8, K7, and K1;

[0014] The other end of the dummy load discharge module is connected to the negative terminal of the first battery pack through K3 and QF1; and connected to the negative terminal of the second battery pack through K6 and QF2;

[0015] The DCDC module is mainly used to output the voltage of the first battery group and the second battery group and the online voltage of the charging screen after stabilizing them to a certain value, so that the first battery group and / or the second battery group can be tested in the online capacity control mode;

[0016] The dummy load discharge module is mainly used as a discharge load to achieve a constant current discharge of a set value;

[0017] The online diode module D1 is connected between the online positive terminal and the positive terminal of the first battery pack, and the normally closed contactor KM1 is connected in parallel to both ends of D1;

[0018] The online diode module D2 is connected between the online positive terminal and the positive terminal of the second battery pack, and the normally closed contactor KM2 is connected in parallel to both ends of D2;

[0019] The relay and the circuit breaker are used as isolation devices to absolutely isolate the working circuits of the two storage battery groups in the core capacity circuit and the non-core capacity circuit.

[0020] Further, when the online core capacity mode is a dual-circuit shared direct floating charging mode of the first battery group and the second battery group: the normally closed contactors KM1 and KM2 are closed, and the control unit controls the relays K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, and the two circuit breakers QF1 and QF2 to be in the disconnected state;

[0021] When the online nuclear capacity mode is the single-channel nuclear capacity discharge mode of the first battery group: relays K8, K2, K3 and circuit breaker QF1 are closed, the normally closed contactor KM1 is disconnected, KM2 is closed, and the remaining relays and circuit breakers are disconnected;

[0022] When the online nuclear capacity mode is the single-channel nuclear capacity discharge mode of the second battery pack: relays K8, K5, K6 and circuit breaker QF2 are closed, the normally closed contactor KM2 is disconnected, KM1 is closed, and the remaining relays and circuit breakers are disconnected;

[0023] When the online core capacity mode is the single-channel pre-charging mode of the first battery group: relays K7, K1, K9, and K2 are closed, the normally closed contactor KM1 is disconnected, KM2 is closed, and the remaining relays and circuit breakers are disconnected;

[0024] When the online core capacity mode is the single-channel pre-charging mode of the second battery pack: relays K7, K4, K9, and K5 are closed, the normally closed contactor KM2 is disconnected, KM1 is closed, and the remaining relays and circuit breakers are disconnected.

[0025] Furthermore, the human-computer interaction module is a touch display unit, having a DCDC module communication port, a switching control module communication port, a temperature and humidity sensor module communication port, a monomer collection and collection device communication port, a GPRS communication port, a USB interface, a NET interface and a dry contact alarm communication port;

[0026] The DCDC module communication port is connected to the DCDC module through the communication unit, and the switching control module communication port is connected to the control unit through the communication unit.

[0027] Furthermore, the human-computer interaction module is also connected to a remote platform, through which a test instruction is issued to the human-computer interaction module, test data is received, and the capacity of the battery is calculated by an intelligent capacity calculation algorithm.

[0028] Furthermore, the voltage level of the first battery pack is 220V, and the voltage level of the second battery pack is -48V.

[0029] The advantages of the present invention are as follows: the online capacity verification device for dual-circuit shared batteries of the present invention is composed of a human-computer interaction module, a communication unit, a control unit and an online capacity verification circuit unit, wherein the online capacity verification circuit unit simultaneously connects the working circuits of the first battery group and the second battery group of two voltage levels, and performs online capacity verification mode tests on the first battery group and / or the second battery group under the control of the control unit, including a dual-circuit shared direct connection floating charge mode, a single-circuit capacity verification discharge mode and a single-circuit pre-charge mode; thereby solving the problem of high capacity verification cost in the current case where there are battery groups of two voltage levels in switchgear and substations at the same time, and can realize remote testing, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0031] Figure 1 It is a schematic diagram of the overall circuit structure of the online storage battery capacity-control device shared by two circuits of the present invention.

[0032] Figure 2 It is a circuit connection diagram when the online core capacity mode of the present invention is in a dual-path shared direct connection floating charge mode.

[0033] Figure 3 It is a circuit connection diagram when the first storage battery pack of the present invention is in an online capacity-converting mode.

[0034] Figure 4 It is a circuit connection diagram when the second storage battery pack of the present invention is in the online capacity-converting mode.

[0035] Figure 5 It is a circuit connection diagram when the first battery pack of the present invention is in a pre-charging mode.

[0036] Figure 6 It is a circuit connection diagram when the second battery pack of the present invention is in pre-charging mode.

[0037] Figure 7 It is a communication topology diagram of the human-computer interaction module of the present invention. DETAILED DESCRIPTION

[0038] The embodiment of the present invention provides an online capacity verification device for dual-circuit shared batteries, which solves the problems of power supply reliability, safety hazards and high capacity verification cost during the capacity verification process when there are battery groups of two voltage levels in the current switchgear and substation.

[0039] The technical solution in the embodiment of the present invention is to solve the above-mentioned problem, and the overall idea is as follows: the online capacity verification device for dual-circuit shared batteries of the present invention is composed of a human-computer interaction module, a communication unit, a control unit and an online capacity verification circuit unit. The online capacity verification circuit unit is simultaneously connected to the working circuits of the first battery group and the second battery group of two voltage levels, and switches the actual test circuit under the control of the control unit to realize the testing of various online capacity verification modes of the first battery group and / or the second battery group, thereby solving the problem of high capacity verification cost in the current case where there are battery groups of two voltage levels in the switchgear and substation at the same time, and can realize remote testing, and is safe and reliable.

[0040] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] See also Figure 1 As shown, the dual-circuit shared online battery capacity checking device of the present invention comprises a human-machine interaction module, a communication unit, a control unit and an online capacity checking circuit unit connected in sequence;

[0042] The online capacity-reducing circuit unit is connected to the working circuits of the first battery group and the second battery group of two voltage levels at the same time, and performs an online capacity-reducing mode test on the first battery group and / or the second battery group under the control of the control unit, wherein the online capacity-reducing mode includes a dual-channel shared direct-connected floating charging mode of the first battery group and the second battery group, a single-channel capacity-reducing discharge mode of the first battery group or the second battery group, and a single-channel pre-charging mode of the first battery group or the second battery group;

[0043] The human-computer interaction module is used to issue a test instruction of the online core capacity mode to the control unit, and the test instruction is transmitted to the control unit by the communication unit;

[0044] The communication unit is also connected to the online capacity control circuit unit for transmitting the voltage and current data of the battery, capacity test data, system status information, fault and alarm information.

[0045] The human-computer interaction module can also be connected to a remote platform, through which a test instruction is issued to the human-computer interaction module, test data is received, and the capacity of the battery is calculated through an intelligent capacity calculation algorithm to realize remote online operation and maintenance.

[0046] The core capacity device of the present invention is used to realize the switching of the operation modes of two battery packs with different voltage levels between core capacity discharge, pre-charge and direct floating charge. When switching to the core capacity discharge state, the dummy load resistor is used to generate heat to consume the electric energy in the battery to achieve the purpose of discharge, and the capacity of the battery is calculated by the intelligent core capacity algorithm. In addition, a monitoring system can be set up to collect, process and transmit the battery voltage and current data to the communication unit. The communication unit realizes the transmission of data between the monitoring system, the core capacity system and inside and outside the station.

[0047] Among them, Figures 2 to 6 As shown, the online core capacitance circuit unit further includes a DCDC module, a dummy load discharge module, a plurality of relays K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, online diode modules D1 and D2, two normally closed contactors KM1 and KM2, and two circuit breakers QF1 and QF2;

[0048] The DCDC module is connected to the online positive terminal of the first battery pack through K7 and K1, and to the positive terminal of the first battery pack through K8 and K2; connected to the online positive terminal of the second battery pack through K8 and K4, and to the positive terminal of the second battery pack through K8 and K5;

[0049] One end of the dummy load discharge module is connected to the DCDC module, and connected to the positive terminal of the first battery pack through K9 and K2; connected to the positive terminal of the second battery pack through K9 and K5; connected to the online positive terminal of the first battery pack through K10 and K4; connected to the online positive terminal of the first battery pack through K10, K8, K7, and K1;

[0050] The other end of the dummy load discharge module is connected to the negative terminal of the first battery pack through K3 and QF1; and connected to the negative terminal of the second battery pack through K6 and QF2;

[0051] The DCDC module is mainly used to output the voltage of the first battery group and the second battery group and the online voltage of the charging screen after stabilizing them to a certain value, so that the first battery group and / or the second battery group can be tested in the online capacity control mode;

[0052] The dummy load discharge module is mainly used as a discharge load to achieve a constant current discharge of a set value;

[0053] The online diode module D1 is connected between the online positive terminal and the positive terminal of the first battery pack, and the normally closed contactor KM1 is connected in parallel to both ends of D1;

[0054] The online diode module D2 is connected between the online positive terminal and the positive terminal of the second battery pack, and the normally closed contactor KM2 is connected in parallel to both ends of D2;

[0055] The relay and the circuit breaker are used as isolation devices to absolutely isolate the working circuits of the two storage battery groups in the core capacity circuit and the non-core capacity circuit.

[0056] like Figures 2 to 6 As shown in the figure, the charging screen (220V charging screen and -48V charging screen), battery group (220V battery group and -48V battery group), and load (including 220V load and -48V load) are all existing equipment in the switchgear or power supply station, and are not included in the dual-circuit shared remote nuclear capacity device described in the present invention. The voltage level of the first battery group is 220V, and the voltage level of the second battery group is -48V.

[0057] like Figure 2 As shown, when the online nuclear capacity mode is a dual-circuit shared direct floating charge mode for the first battery group and the second battery group: the normally closed contactors KM1 and KM2 are closed, and the control unit controls the relays K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, and the two circuit breakers QF1 and QF2 are all in the disconnected state; under normal circumstances, the normally closed contactors KM1 and KM2 are closed, and the system is in the direct floating charge state, and the 220V charging screen and -48V communication power supply are used to float charge the two groups of batteries respectively, and at the same time, provide power to the DC equipment under each system. Of course, according to maintenance needs, one path can be selected for nuclear capacity testing, and the other path will not be affected at all.

[0058] like Figure 3 As shown, when the online nuclear capacity mode is the single-channel nuclear capacity discharge mode of the first battery pack: relays K8, K2, K3 and circuit breaker QF1 are closed, the normally closed contactor KM1 is disconnected, KM2 is closed, and the remaining relays and circuit breakers are disconnected; so that the first battery pack (220V) is stepped down by the DCDC module and then input into the dummy load discharge module for nuclear capacity discharge test. At this time, the constant current discharge of the set value of the battery pack can be achieved through the constant voltage output of the DCDC module.

[0059] like Figure 4 As shown, when the online nuclear capacity mode is the single-channel nuclear capacity discharge mode of the second battery pack: relays K8, K5, K6 and circuit breaker QF2 are closed, the normally closed contactor KM2 is disconnected, KM1 is closed, and the remaining relays and circuit breakers are disconnected; so that the second battery pack (-48V) is input to the dummy load discharge module for nuclear capacity discharge test after being stabilized by the DCDC module. At this time, the constant current discharge of the set value of the battery pack can be achieved through the constant voltage output of the DCDC module.

[0060] like Figure 5As shown, when the online core capacity mode is the single-circuit pre-charging mode of the first battery pack: relays K7, K1, K9, and K2 are closed, the normally closed contactor KM1 is disconnected, KM2 is closed, and the remaining relays and circuit breakers are disconnected; the voltage from the charging screen (220V) is stabilized by the DCDC module and output to the first battery pack (220V), so that it can be restored to a value near the online voltage under the premise of safety, avoiding the impact of large current on the first battery pack caused by excessive pressure difference when the system is connected back. When the system detects that the terminal voltage of the first battery pack is the same as the online voltage and the current is reduced to the set cut-off current, it automatically switches to the direct floating charging mode.

[0061] like Figure 6 As shown, when the online core capacity mode is the single-circuit pre-charging mode of the second battery pack: relays K7, K4, K9, and K5 are closed, the normally closed contactor KM2 is disconnected, KM1 is closed, and the remaining relays and circuit breakers are disconnected. The DCDC module stabilizes the voltage from the charging screen (-48V) and outputs it to the second battery pack (-48V), so that it can be restored to a value near the online voltage under the premise of safety, avoiding the impact of excessive pressure difference on the second battery pack when the system is connected back to the system. When the system detects that the terminal voltage of the second battery pack is the same as the online voltage and the current is reduced to the set cut-off current, it automatically switches to the direct floating charge mode.

[0062] like Figure 7 As shown, the human-computer interaction module is a touch display unit, which has a DCDC module communication port, a switching control module communication port, a temperature and humidity sensor module communication port, a monomer collection and aggregation communication port, a GPRS communication port, a USB interface, a NET interface and a dry contact alarm communication port; the DCDC module communication port is connected to the DCDC module through the communication unit, and the switching control module communication port is connected to the control unit through the communication unit. The touch display unit serves as a user interface to display information such as nuclear capacity test data, test status, battery health status, etc., while allowing the operator to configure and control. The touch display unit transmits the data of the DCDC module, switching control module, temperature and humidity sensor, monomer collection and aggregation, and dry contact alarm to the 7-inch LCD screen module through the RS485 communication method, and then uploads it to the platform through NET wired Ethernet or GPRS wireless access to achieve remote online operation and maintenance.

[0063] Before starting the nuclear capacity discharge test, the nuclear capacity device of the present invention first ensures that all modules of the remote nuclear capacity device are in normal working condition. The operator selects the voltage level (220V or -48V) of the battery pack that needs to be tested for nuclear capacity through the human-computer interaction module or the remote monitoring platform, and the system will automatically configure the corresponding DCDC module parameters to adapt to the voltage requirements of the selected battery pack. Before performing nuclear capacity discharge, the system automatically performs a self-test test to ensure that the DCDC module, dummy load discharge module, online diode module, contactor, relay and circuit breaker all respond normally. For non-test battery packs, the system will ensure that the battery pack of the non-test circuit is completely isolated from the test circuit through relay and circuit breaker switching to ensure the safety of the test process.

[0064] According to the preset discharge program, the system stabilizes the battery pack voltage through the DCDC module and then inputs it into the dummy load discharge module for constant current discharge. During the discharge process, the intelligent core capacity algorithm monitors and calculates the capacity of the battery pack in real time. The monitoring system simultaneously collects key data such as battery voltage and current, and transmits the data to the touch screen and remote monitoring platform through the communication unit to achieve real-time monitoring and recording of data.

[0065] When the discharge reaches the preset cut-off condition (such as the voltage drops to the set threshold, the discharge time is reached, the discharge capacity is reached), the system automatically stops discharging and switches to the pre-charging mode. The DCDC module stabilizes the voltage from the DC charging screen and outputs it to the battery pack, so that it can be restored to a value near the online voltage under the premise of safety, and then switches back to the direct floating charging mode. At the same time, the test results are recorded for subsequent analysis.

[0066] The dual-circuit shared online nuclear capacity device of the present invention can be applied to battery packs of two different voltage levels at the same time, which solves the problem of needing two sets of nuclear capacity devices of different voltage levels, reduces the requirements for the installation environment and spatial layout, and thus saves costs. Through online remote nuclear capacity testing, the power supply reliability of the site is improved, and the risk of power supply interruption caused by testing is reduced. At the same time, by using isolation devices, the stability and safety of the battery in the non-nuclear capacity circuit during the nuclear capacity test is ensured, and operational risks are prevented. In daily work, operation and maintenance personnel can access the nuclear capacity test data, test status, battery health status and other information of the battery pack in real time through the remote monitoring platform.

[0067] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A dual-circuit shared online battery capacity verification device, characterized in that: It includes a human-computer interaction module, a communication unit, a control unit and an online core capacitance circuit unit connected in sequence; The online capacity-reducing circuit unit is connected to the working circuits of the first battery group and the second battery group of two different voltage levels at the same time, and performs an online capacity-reducing mode test on the first battery group and / or the second battery group under the control of the control unit, wherein the online capacity-reducing mode includes a dual-channel shared direct-connected floating charging mode of the first battery group and the second battery group, a single-channel capacity-reducing discharge mode of the first battery group or the second battery group, and a single-channel pre-charging mode of the first battery group or the second battery group; The human-computer interaction module is used to issue a test instruction of the online capacity verification mode to the control unit, and the test instruction is transmitted to the control unit by the communication unit; the operator selects the voltage level of the battery pack that needs to be tested for capacity verification through the human-computer interaction module or the remote monitoring platform, and the system will automatically configure the parameters of the DCDC module in the online capacity verification circuit unit to adapt to the voltage requirements of the selected battery pack; The communication unit is also connected to the online capacitance test circuit unit for transmitting the voltage and current data of the battery and the capacitance test data; The online core capacity circuit unit further includes a DCDC module, a dummy load discharge module, a plurality of relays K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, online diode modules D1 and D2, two normally closed contactors KM1 and KM2, and two circuit breakers QF1 and QF2; The DCDC module is connected to the online positive terminal of the first battery pack through K7 and K1, and to the positive terminal of the first battery pack through K8 and K2; connected to the online positive terminal of the second battery pack through K8 and K4, and to the positive terminal of the second battery pack through K8 and K5; One end of the dummy load discharge module is connected to the DCDC module, and connected to the positive terminal of the first battery pack through K9 and K2; connected to the positive terminal of the second battery pack through K9 and K5; connected to the online positive terminal of the second battery pack through K10 and K4; connected to the online positive terminal of the first battery pack through K10, K8, K7, and K1; The other end of the dummy load discharge module is connected to the negative terminal of the first battery pack through K3 and QF1; and connected to the negative terminal of the second battery pack through K6 and QF2; The DCDC module is used to output the voltage of the first battery group and the second battery group and the online voltage of the charging screen after stabilizing them to a certain value, so that the first battery group and / or the second battery group can be tested in the online capacity control mode; The dummy load discharge module is used as a discharge load to achieve a constant current discharge of a set value; The online diode module D1 is connected between the online positive terminal and the positive terminal of the first battery pack, and the normally closed contactor KM1 is connected in parallel to both ends of D1; The online diode module D2 is connected between the online positive terminal and the positive terminal of the second battery pack, and the normally closed contactor KM2 is connected in parallel to both ends of D2; The relay and the circuit breaker are used as isolation devices to absolutely isolate the working circuits of the two storage battery groups in the core capacity circuit and the non-core capacity circuit.

2. A dual-circuit shared online battery capacity verification device as claimed in claim 1, characterized in that: When the online core capacity mode is a dual-circuit shared direct floating charging mode for the first battery group and the second battery group: the normally closed contactors KM1 and KM2 are closed, and the control unit controls the relays K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, and the two circuit breakers QF1 and QF2 to be in the disconnected state; When the online nuclear capacity mode is the single-channel nuclear capacity discharge mode of the first battery group: relays K8, K2, K3 and circuit breaker QF1 are closed, the normally closed contactor KM1 is disconnected, KM2 is closed, and the remaining relays and circuit breakers are disconnected; When the online nuclear capacity mode is the single-channel nuclear capacity discharge mode of the second battery pack: relays K8, K5, K6 and circuit breaker QF2 are closed, the normally closed contactor KM2 is disconnected, KM1 is closed, and the remaining relays and circuit breakers are disconnected; When the online core capacity mode is the single-channel pre-charging mode of the first battery group: relays K7, K1, K9, and K2 are closed, the normally closed contactor KM1 is disconnected, KM2 is closed, and the remaining relays and circuit breakers are disconnected; When the online core capacity mode is the single-channel pre-charging mode of the second battery pack: relays K7, K4, K9, and K5 are closed, the normally closed contactor KM2 is disconnected, KM1 is closed, and the remaining relays and circuit breakers are disconnected.

3. A dual-circuit shared online battery capacity verification device as claimed in claim 1, characterized in that: The human-computer interaction module is a touch display unit, having a DCDC module communication port, a switching control module communication port, a temperature and humidity sensor module communication port, a monomer collection and collection device communication port, a GPRS communication port, a USB interface, a NET interface and a dry contact alarm communication port; The DCDC module communication port is connected to the DCDC module through the communication unit, and the switching control module communication port is connected to the control unit through the communication unit.

4. A dual-circuit shared online battery capacity verification device as claimed in claim 1, characterized in that: The human-computer interaction module is also connected to a remote platform, through which a test instruction is issued to the human-computer interaction module, test data is received, and the capacity of the battery is calculated by an intelligent capacity calculation algorithm.

5. The dual-circuit shared online battery capacity verification device as claimed in claim 1, characterized in that: The voltage level of the first battery pack is 220V, and the voltage level of the second battery pack is -48V.

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