A nuclear capacity device and method

Abstract

An embodiment of the present invention provides a capacity verification device and method, which relate to the technical field of capacity verification. The capacity verification device includes an active inverter, a monitor, and a battery detection module. Both the active inverter and the battery detection module are electrically connected to the battery pack. The active inverter is also electrically connected to the power grid. The monitor is electrically connected to both the active inverter and the battery detection module. The active inverter is configured to invert the DC signal provided by the battery pack into an AC signal and transmit the AC signal to the power grid. The battery detection module is configured to detect the DC signal of the battery pack and transmit the DC signal to the monitor. The monitor is configured to control the active inverter to transmit the AC signal to the power grid according to the first preset rule based on the DC signal. Through the capacity verification device and method, the capacity verification of the battery pack is more energy-saving, environmentally friendly, and safe.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear capacity, and in particular, to a nuclear capacity device and method. Background Art

[0002] The DC power supply system is an important part of power plants and substations, providing working voltage for DC-powered equipment in power plants and substations. As the backup power supply of the DC power supply system, the storage battery is one of the most core components of the DC power supply system. Therefore, it is crucial to determine the quality of the storage battery.

[0003] The most reliable method for determining the quality of existing storage batteries is nuclear capacity, and basically the resistance discharge method is used to perform nuclear capacity on the storage battery. The energy released by the storage battery is consumed in the form of heat. On the one hand, it causes energy waste, and on the other hand, the high temperature generated by the discharge is likely to cause a fire. Therefore, there is an urgent need for a more energy-saving, environmentally friendly and safe nuclear capacity method to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a nuclear capacity device and method, which are more energy-saving, environmentally friendly and safe when performing nuclear capacity on a storage battery pack through the nuclear capacity device and method.

[0005] In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present invention are as follows:

[0006] In a first aspect, an embodiment of the present invention provides a nuclear capacity device, including an active inverter, a monitor, and a battery detection module. The active inverter and the battery detection module are both electrically connected to the storage battery pack. The active inverter is also electrically connected to the power grid. The monitor is electrically connected to both the active inverter and the battery detection module. The active inverter is used to invert the DC signal provided by the storage battery pack into an AC signal and transmit the AC signal to the power grid. The battery detection module is used to detect the DC signal of the storage battery pack and transmit the DC signal to the monitor. The monitor is used to control the active inverter to transmit the AC signal to the power grid according to the first preset rule based on the DC signal.

[0007] In a second aspect, an embodiment of the present invention further provides a nuclear capacity method, which is applied to the nuclear capacity device. The nuclear capacity device includes an active inverter, a monitor, and a battery detection module. The active inverter and the battery detection module are both electrically connected to the storage battery pack. The active inverter is also electrically connected to the power grid. The monitor is electrically connected to both the active inverter and the battery detection module. The nuclear capacity method includes: the monitor controls the active inverter to invert the DC signal provided by the storage battery pack into an AC signal according to the second preset rule based on the initially acquired data, and the active inverter transmits the AC signal to the power grid. The battery detection module detects the DC signal of the storage battery pack and transmits the DC signal to the monitor. The monitor controls the active inverter to transmit the AC signal to the power grid according to the first preset rule based on the DC signal.

[0008] An equalizing charge device and method provided by an embodiment of the present invention. The equalizing charge device converts a DC signal provided by a battery pack into an AC signal through an active inverter and transmits the AC signal to the power grid. A battery detection module is used to detect the DC signal of the battery pack and transmit the DC signal to a monitor. The monitor controls the active inverter to transmit the AC signal to the power grid according to the DC signal according to a first preset rule. The energy released by the battery pack is still fed back to the power grid in the form of electric energy through the active inverter. Compared with the existing equalizing charge method in which all the energy released by the battery pack is dissipated in the form of heat, the equalizing charge device and method provided by the embodiment of the present invention are more energy-saving and environmentally friendly, and are fed back to the power grid in the form of electric energy, generating less heat and having a lower probability of causing a fire.

[0009] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0011] Figure 1 Shows a schematic diagram of the application environment of the equalizing charge device provided by the embodiment of the present invention;

[0012] Figure 2 Shows a first structural block diagram of the equalizing charge device provided by the embodiment of the present invention;

[0013] Figure 3 Shows Figure 2 A circuit schematic diagram of the active inverter of the equalizing charge device in

[0014] Figure 4 Shows a second structural block diagram of the equalizing charge device provided by the embodiment of the present invention;

[0015] Figure 5 Shows a schematic flowchart of the equalizing charge method provided by the embodiment of the present invention.

[0016] Icons: 1 - Capacity testing device; 10 - Active inverter; 11 - Full - bridge resonance unit; 12 - Transformer; 13 - Rectifier bridge; 14 - Inverter unit; 15 - First filtering unit; 16 - Second filtering unit; 17 - Switch unit; 20 - Monitor; 21 - Input unit; 22 - Processor; 30 - Battery detection module; 31 - Voltage detection unit; 32 - Current detection unit; 40 - Temperature detection module; 2 - Battery pack; 3 - Power grid; 4 - AC power source. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0018] It should be noted that: similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0019] As Figure 1 shown, it is a schematic diagram of the application environment of the capacity testing device 1 provided by the embodiment of the present invention. The capacity testing device 1 is electrically connected between the battery pack 2 and the power grid 3, and is used to invert the DC signal of the battery pack 2 into an AC signal according to a preset rule and transmit the AC signal to the power grid 3.

[0020] Please refer to Figure 2 , for Figure 1 a feasible structural block diagram of the capacity testing device 1 shown in. The capacity testing device 1 includes an active inverter 10, a monitor 20 and a battery detection module 30. The active inverter 10 and the battery detection module 30 are both electrically connected to the battery pack 2, the active inverter 10 is also electrically connected to the power grid 3, and the monitor 20 is electrically connected to both the active inverter 10 and the battery detection module 30.

[0021] The active inverter 10 is used to invert the DC signal provided by the battery pack 2 into an AC signal and transmit the AC signal to the power grid 3; the battery detection module 30 is used to detect the DC signal of the battery pack 2 and transmit the DC signal to the monitor 20; the monitor 20 is used to control the active inverter 10 to transmit the AC signal to the power grid 3 according to the first preset rule based on the DC signal. Among them, the active inverter 10 is also known as a grid-connected inverter, and the active inverter 10 is a single-phase active inverter; the DC signal is the DC signal detected by the battery detection module 30 during the discharge process of the battery pack 2, rather than the DC signal when the battery pack 2 starts to discharge.

[0022] In this embodiment, the capacity testing device 1 can transmit the electric energy of the battery pack 2 to a single-phase power grid, and the capacity testing device 1 can also transmit the electric energy of the battery pack 2 to a three-phase power grid. The difference between the capacity testing device 1 transmitting the electric energy of the battery pack 2 to a single-phase power grid and a three-phase power grid is that in a single-phase power grid, the capacity testing device 1 only needs to use one active inverter 10 to transmit the electric energy of the battery pack 2 to the single-phase power grid; in a three-phase power grid, the capacity testing device 1 needs to use three active inverters 10 to invert the DC signals of the battery pack 2 into A-phase AC signal, B-phase AC signal and C-phase AC signal respectively, and transmit the A-phase AC signal, B-phase AC signal and C-phase AC signal to the three-phase power grid respectively. Of course, in this embodiment, a three-phase active inverter can also be used to invert the DC signals of the battery pack 2 into A-phase AC signal, B-phase AC signal and C-phase AC signal respectively, and transmit the A-phase AC signal, B-phase AC signal and C-phase AC signal to the three-phase power grid respectively.

[0023] Please refer to Figure 3 , for Figure 2 the circuit schematic diagram of the active inverter 10 shown in

[0024] In this embodiment, the full-bridge resonant unit 11 is used to convert the DC signal of the battery pack 2 into a square wave signal according to the control signal sent by the monitor 20 and send the square wave signal to the transformer 12.

[0025] Among them, the full-bridge resonant unit 11 includes four MOS transistors, a first capacitor and a first inductor, which can be respectively set as the first MOS transistor, the second MOS transistor, the third MOS transistor and the fourth MOS transistor. The gates of the four MOS transistors are all electrically connected to the monitor 20. The drains of the first MOS transistor and the third MOS transistor are both electrically connected to the positive electrode of the battery pack 2. The source of the first MOS transistor is electrically connected to the drain of the second MOS transistor and one end of the first capacitor. The source of the third MOS transistor is electrically connected to the drain of the fourth MOS transistor and the transformer 12. The sources of the second MOS transistor and the fourth MOS transistor are both electrically connected to the negative electrode of the battery pack 2. The other end of the first capacitor is electrically connected to one end of the first inductor. The other end of the first inductor is electrically connected to the transformer 12.

[0026] It can be understood that the monitor 20 sends control signals to the four MOS transistors to control the on or off states of the four MOS transistors, thereby realizing the conversion of the DC signal of the battery pack 2 into a square wave signal.

[0027] In this embodiment, the transformer 12 includes a primary coil, a secondary coil and an auxiliary coil. One end of the primary coil is electrically connected to the first inductor, and the other end of the primary coil is electrically connected to the source of the third MOS transistor and the drain of the fourth MOS transistor. The secondary coil is electrically connected to the rectifier bridge 13, and the auxiliary coil is electrically connected to the inverter unit 14. Among them, the transformer 12 is used to perform step-up or step-down processing on the square wave signal to obtain a processed signal.

[0028] In this embodiment, the rectifier bridge 13 includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a second capacitor C2 and a third capacitor C3. The cathode of the first diode D1 is electrically connected to the cathode of the second diode D2, one end of the second capacitor C2 and the inverter unit 14. The anode of the first diode D1 is electrically connected to one end of the secondary coil and the cathode of the third diode D3. The anode of the second diode D2 is electrically connected to the cathode of the fourth diode D4 and the other end of the secondary coil. The anodes of the third diode D3 and the fourth diode D4 are both electrically connected to one end of the third capacitor C3 and the inverter unit 14. The other end of the second capacitor C2 is electrically connected to the other end of the third capacitor C3, the auxiliary coil and the inverter unit 14. Among them, the rectifier bridge 13 is used to rectify the processed signal obtained after the step-up or step-down processing of the transformer 12 to obtain a rectified signal.

[0029] In this embodiment, the inverter unit 14 can adopt a half-bridge inverter circuit. The inverter unit 14 includes three input terminals and one output terminal. One of the input terminals is electrically connected to the cathode of the first diode D1, the cathode of the second diode D2, and one end of the second capacitor. Another input terminal is electrically connected to the auxiliary coil and the neutral line of the power grid 3. The remaining input terminal is electrically connected to the anode of the third diode D3, the anode of the fourth diode D4, and one end of the third capacitor C3. The output terminal is electrically connected to the live wire of the power grid 3. The inverter unit 14 is used to perform an inversion process on the rectified signal obtained by rectifying the rectifier bridge 13 to obtain an AC signal.

[0030] Further, in this embodiment, the active inverter 10 further includes a first filtering unit 15. The first filtering unit 15 is electrically connected between the battery pack 2 and the full-bridge resonance unit 11, and is used to filter the DC signal input by the battery pack 2. The first filtering unit 15 includes an X capacitor or an inductor. The X capacitor is connected in parallel between the battery pack 2 and the full-bridge resonance unit 11, and the inductor is connected in series between the battery pack 2 and the full-bridge resonance unit 11.

[0031] Further, in this embodiment, the active inverter 10 further includes a second filtering unit 16. The second filtering unit 16 includes a second inductor L2 and a fourth capacitor C4. One end of the second inductor L2 is electrically connected to the output terminal of the inverter unit 14. The other end of the second inductor L2 is electrically connected to one end of the fourth capacitor C4 and the live wire of the power grid 3. The other end of the fourth capacitor C4 is electrically connected to the neutral line of the power grid 3. The second filtering unit 16 is used to filter the AC signal obtained after the inverter unit 14 performs an inversion process to obtain a filtered AC signal.

[0032] Further, in this embodiment, the active inverter 10 is also electrically connected to an AC power supply 4, and the AC power supply 4 provides power for the active inverter 10.

[0033] Further, in this embodiment, the active inverter 10 further includes a switch unit 17. The switch unit 17 includes a first switch K1 and a second switch K2. The first switch K1 is electrically connected between the live wire of the AC power supply 4 and the active inverter 10. The second switch K2 is electrically connected between the second filtering unit 16 of the inverter and the live wire of the power grid 3.

[0034] Please refer to Figure 4 , in this embodiment, the battery detection module 30 includes a voltage detection unit 31. The voltage detection unit 31 is electrically connected to both the battery pack 2 and the monitor 20.

[0035] Among them, the DC signal includes a voltage signal. The voltage detection unit 31 is used to detect the voltage signal of the battery pack 2 and transmit the voltage signal to the monitor 20.

[0036] It can be understood that after the monitor 20 controls the active inverter 10 to start working, the voltage detection unit 31 detects the voltage signal of the battery pack 2 in real time and transmits the detected voltage signal in real time to the monitor 20.

[0037] In this embodiment, the voltage detection unit 31 may use a sampling resistor to sample the voltage signal of the battery pack 2. The sampling resistor is electrically connected to both the battery pack 2 and the monitor 20, and the sampling resistor transmits the collected voltage signal to the monitor 20.

[0038] In this embodiment, the battery detection module 30 further includes a current detection unit 32. The current detection unit 32 is electrically connected to both the battery pack 2 and the monitor 20.

[0039] Among them, the DC signal further includes a current signal. The current detection unit 32 is used to detect the current signal of the battery pack 2 and transmit the current signal to the monitor 20.

[0040] It can be understood that after the monitor 20 controls the active inverter 10 to start working, the current detection unit 32 detects the current signal of the battery pack 2 in real time and transmits the detected current signal in real time to the monitor 20.

[0041] The monitor 20 controls the AC signal output by the active inverter 10 to meet the first preset rule according to the voltage signal and current signal detected in real time.

[0042] In this embodiment, the current detection unit 32 may use a Hall sensor or a current transformer. When the current detection unit 32 uses a Hall sensor, the Hall sensor is electrically connected to both the battery pack 2 and the monitor 20, and the Hall sensor transmits the detected current signal to the monitor 20. When the current detection unit 32 uses a current transformer, the current transformer is sleeved on the line between the battery pack 2 and the active inverter 10, and the output end of the current transformer is also electrically connected to the monitor 20. The current transformer transmits the current signal flowing through the line (i.e., the current signal output by the battery pack 2) to the monitor 20 according to the electromagnetic induction principle.

[0043] In this embodiment, the monitor 20 includes an input unit 21 and a processor 22. The input unit 21 is electrically connected to the processor 22, and the processor 22 is also electrically connected to both the active inverter 10 and the battery detection module 30.

[0044] Among them, the input unit 21 is used to send initial data to the processor 22 according to user operations; the processor 22 is used to control the active inverter 10 to transmit an AC signal to the power grid 3 according to the initial data according to the second preset rule.

[0045] In this embodiment, the processor 22 is further configured to control the active inverter 10 to transmit an AC signal to the power grid 3 according to a first preset rule based on the DC signal. It can be understood that when the battery pack 2 starts to discharge to the power grid 3 through the active inverter 10, the processor 22 first controls the active inverter 10 to transmit an AC signal to the power grid 3 according to a second preset rule based on the initial data input by the input unit 21; during the process of the battery pack 2 discharging to the power grid 3 through the active inverter 10, the processor 22 then controls the active inverter 10 to transmit an AC signal to the power grid 3 according to the DC signal detected in real time by the battery detection module 30 according to the first preset rule.

[0046] It can be understood that the processor 22 includes multiple pins, and the multiple pins are electrically connected to the input unit 21, the active inverter 10, and the battery detection module 30 respectively, that is, the multiple pins are electrically connected to the input unit 21, the 4 MOS transistors of the full-bridge resonance unit 11 in the active inverter 10, the voltage detection unit 31, and the current detection unit 32 respectively.

[0047] In this embodiment, the processor 22 may be an integrated circuit chip with signal processing capabilities. The above-mentioned processor 22 may be a general-purpose processor, including a central processing unit (CPU for short), a network processor (NP for short), etc.; it may also be a digital signal processor (DSP for short), an application specific integrated circuit (ASIC for short), a field-programmable gate array (FPGA for short), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0048] In this embodiment, the input unit 21 may be a touch display screen, a display screen with an interaction function, etc. It can be understood that the input unit 21 can not only input initial data to the processor 22 according to the user's operation, but also display the data processed by the processor 22 or the received data. For example, the input unit 21 can display the voltage signal and current signal received by the processor 22.

[0049] Furthermore, in this embodiment, the core capacity equalization device 1 further includes a temperature detection module 40, the temperature detection module 40 is arranged at the battery pack 2, and the temperature detection module 40 is electrically connected to the monitor 20.

[0050] The temperature detection module 40 is used to detect the temperature signal of the battery pack 2 and transmit the temperature signal to the monitor 20; the monitor 20 is used to control whether the active inverter 10 transmits an AC signal to the power grid 3 according to the temperature signal.

[0051] In this embodiment, the temperature detection module 40 can adopt a thermocouple or a thermistor, and the thermocouple or the thermistor is electrically connected to the processor 22 of the monitor 20. The thermocouple or the thermistor is used to collect the temperature signal of the battery pack 2 and transmit the temperature signal to the processor 22. The processor 22 compares the temperature signal with a preset temperature value. If the temperature signal is higher than the preset temperature value, the processor 22 will control the 4 MOS transistors in the active inverter 10 to be in the off state, so that the battery pack 2 cannot discharge to the power grid 3; if the temperature signal is not higher than the preset temperature value, the processor 22 controls the active inverter 10 to normally transmit an AC signal to the power grid 3.

[0052] Please refer to Figure 5 , which is a schematic flowchart of the capacity calibration method. The capacity calibration method is applied to the above-mentioned capacity calibration device 1, and the capacity calibration method includes the following steps:

[0053] Step S1, the monitor 20 controls the active inverter 10 to invert the DC signal provided by the battery pack 2 into an AC signal according to the initially obtained data according to a second preset rule, and the active inverter 10 transmits the AC signal to the power grid 3.

[0054] In this embodiment, the user inputs the initial data or selects the initial data on the display interface of the input unit 21, and the input unit 21 transmits the initial data to the processor 22. Among them, the initial data is the nominal capacity of the battery pack 2.

[0055] In this embodiment, the second preset rule is: when the monitor 20 controls the active inverter 10 to transmit an AC signal to the power grid 3, the output power of the battery pack 2 is a second power value, where the second power value is calculated from the initial data and the initial voltage signal, and the initial voltage signal is the voltage signal detected by the voltage detection unit 31 when the battery pack 2 starts to discharge.

[0056] It can be understood that the processor 22 calculates the second power value according to the nominal capacity and the initial voltage signal, and the processor 22 adjusts the duty cycle of the control signal output to the full-bridge resonance unit 11 according to the second power value. Different second power values correspond to control signals with different duty cycles. The full-bridge resonance unit 11 makes the power value output by the battery pack 2 be the second power value according to this control signal.

[0057] In this embodiment, the processor 22 calculates the second power value according to the following formula:

[0058] P1 = 0.1 * C1 * U1 * η;

[0059] Among them, C1 represents the nominal capacity, U1 represents the initial voltage signal, and η represents the conversion efficiency of the active inverter 10.

[0060] In step S2, the battery detection module 30 detects the DC signal of the battery pack 2 and transmits the DC signal to the monitor 20.

[0061] In this embodiment, during the discharge process of the battery pack 2, the capacity and voltage of the battery pack 2 will continuously decrease. When the battery pack 2 is subjected to capacity verification, it needs to be verified according to the 10h discharge rate (0.1C). Therefore, the battery detection module 30 needs to transmit the real-time DC signal of the battery pack 2 to the processor 22, so that the processor 22 can adjust the duty cycle of the control signal according to the real-time DC signal, and then make the active inverter 10 make corresponding adjustments as the voltage of the battery pack 2 drops, ensuring that the battery pack 2 is discharged and verified according to the 10h discharge rate (0.1C). Among them, the DC signal includes a voltage signal and a current signal. The voltage signal is the voltage signal detected by the voltage detection unit 31 during the discharge process of the battery pack 2, and the current signal is the current signal detected by the current detection unit 32 during the discharge process of the battery pack 2.

[0062] In step S3, the monitor 20 controls the active inverter 10 to transmit an AC signal to the power grid 3 according to the DC signal.

[0063] In this embodiment, the first preset rule is: when the monitor 20 controls the active inverter 10 to transmit an AC signal to the power grid 3, the output power of the battery pack 2 is a first power value, where the first power value is calculated from the DC signal.

[0064] It can be understood that the processor 22 calculates the first power value according to the current signal and the voltage signal, and the processor 22 adjusts the duty cycle of the control signal output to the full-bridge resonance unit 11 according to the first power value. Different first power values correspond to control signals with different duty cycles. Among them, the current signal is obtained by the current detection unit 32 performing real-time detection on the battery pack 2, and the voltage signal is obtained by the voltage detection unit 31 performing real-time detection on the battery pack 2.

[0065] In this embodiment, the processor 22 calculates the first power value according to the following formula:

[0066] I = 0.1 * C1 * + K * (0.1 * C1 - I1);

[0067] P2 = I * U2 * η;

[0068] Wherein, C1 represents the nominal capacity, I1 represents the current signal, U2 represents the voltage signal, K represents the adjustment coefficient, and η represents the conversion efficiency of the active inverter 10. In this embodiment, the value of K can be 0.1 - 0.9.

[0069] Further, in this embodiment, the battery capacity verification method further includes the following steps:

[0070] Step S4, the monitor 20 determines whether the battery pack 2 has completed discharging according to the DC signal and the preset conditions.

[0071] If the battery pack 2 has completed discharging, the monitor 20 controls the active inverter 10 to stop working. If the battery pack 2 has not completed discharging, the monitor 20 controls the active inverter 10 to transmit an AC signal to the power grid 3 according to the second preset rule.

[0072] In this embodiment, the preset conditions may be whether the voltage signal of the battery pack 2 reaches the discharge cut-off voltage, whether the discharged capacity of the battery pack 2 reaches the preset target value, and whether the discharge time of the battery pack 2 reaches the discharge protection time. Among them, the discharged capacity of the battery pack 2 can be calculated according to the current signal and the voltage signal; the discharge time of the battery pack 2 can be obtained by starting timing when the processor 22 receives the initial data.

[0073] It can be understood that if the voltage signal of the battery pack 2 obtained by the processor 22 reaches the discharge cut-off voltage, the discharged capacity of the battery pack 2 reaches the preset target value, and / or the discharge time of the battery pack 2 reaches the discharge protection time, the processor 22 will control the 4 MOS transistors in the full-bridge resonance unit 11 to be in the off state, so that the battery pack 2 stops discharging to the power grid 3. If the voltage signal of the battery pack 2 obtained by the processor 22 does not reach the discharge cut-off voltage, the discharged capacity of the battery pack 2 does not reach the preset target value, and the discharge time of the battery pack 2 does not reach the discharge protection time, the processor 22 controls the active inverter 10 to transmit an AC signal to the power grid 3 according to the first preset rule.

[0074] In summary, the nuclear capacity testing device and method provided by the embodiments of the present invention. The nuclear capacity testing device converts the DC signal provided by the battery pack into an AC signal through an active inverter and transmits the AC signal to the power grid. The battery detection module is used to detect the DC signal of the battery pack and transmit the DC signal to the monitor. The monitor controls the active inverter to transmit the AC signal to the power grid according to the DC signal according to the first preset rule. The energy released by the battery pack is still fed back to the power grid in the form of electric energy through the active inverter. Compared with the existing nuclear capacity testing method in which all the energy released by the battery pack is dissipated in the form of heat, the nuclear capacity testing device and method provided by the embodiments of the present invention are more energy-saving and environmentally friendly. And it is fed back to the power grid in the form of electric energy, generating less heat, with a lower probability of causing a fire, and does not require an additional fan for heat dissipation, reducing costs. Since the nuclear capacity testing device and method of the present invention generate less heat, the internal components of the nuclear capacity testing device will not be affected by high temperatures and have a relatively long lifespan. And it is controlled by a processor and can be used for remote automatic nuclear capacity testing without the need for personnel to be on-site, saving labor costs. This nuclear capacity testing device can be placed in an operating DC power supply system. By periodically discharging the battery slightly automatically, faults such as open circuit and severe deterioration of the battery pack can be detected, thereby reducing the risk of the battery pack operating with problems and improving the reliability of the DC power supply.

[0075] It should be noted that in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0076] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

Claims

1. A nuclear capacity device, characterized in that, it includes an active inverter, a monitor and a battery detection module. The active inverter and the battery detection module are both electrically connected to the battery pack. The active inverter is also electrically connected to the power grid. The monitor is electrically connected to both the active inverter and the battery detection module. The monitor includes an input unit and a processor. The input end of the processor is electrically connected to the output end of the input unit and the output end of the battery detection module respectively. The output end of the processor is electrically connected to the active inverter; The active inverter is used to invert the DC signal provided by the battery pack into an AC signal and transmit the AC signal to the power grid; The input unit is used to send the nominal capacity of the battery pack to the processor according to user operations; The battery detection module is used to detect the initial voltage signal when the battery pack starts to discharge and transmit the initial voltage signal to the processor; The battery detection module is used to detect the DC signal of the battery pack and transmit the DC signal to the processor; The DC signal includes a voltage signal. The battery detection module includes a voltage detection unit. The voltage detection unit is electrically connected to both the battery pack and the processor. The voltage detection unit is used to detect the voltage signal during the discharge process of the battery pack and transmit the voltage signal to the processor; The DC signal includes a current signal. The battery detection module includes a current detection unit. The current detection unit is electrically connected to both the battery pack and the processor. The current detection unit is used to detect the current signal during the discharge process of the battery pack and transmit the current signal to the processor; When the battery pack starts to discharge, the processor is used to control the active inverter to transmit the AC signal to the power grid according to the nominal capacity and the initial voltage signal according to a second preset rule. The second preset rule is: when the processor controls the active inverter to transmit the AC signal to the power grid, the output power of the battery pack is a second power value; Wherein, the second power value = 0.1 * nominal capacity * initial voltage signal * conversion efficiency of the active inverter; During the discharge process of the battery pack, the processor is used to control the active inverter to transmit the AC signal to the power grid according to the nominal capacity, current signal and voltage signal according to a first preset rule. The first preset rule is: when the processor controls the active inverter to transmit the AC signal to the power grid, the output power of the battery pack is a first power value; Wherein, the first power value = [0.1 * nominal capacity + adjustment coefficient * (0.1 * nominal capacity - current signal)] * voltage signal * conversion efficiency of the active inverter.

2. The nuclear capacity device according to claim 1, characterized in that, The active inverter includes a full-bridge resonant unit, a transformer, a rectifier bridge, and an inversion unit. The full-bridge resonant unit is electrically connected to the battery pack, the monitor, and the transformer. The transformer is electrically connected to the rectifier bridge. The rectifier bridge is electrically connected to the inversion unit. The inversion unit is electrically connected to the power grid.

3. The capacity testing device according to claim 1, characterized in that, the capacity testing device further includes a temperature detection module. The temperature detection module is disposed at the battery pack and is electrically connected to the monitor; the temperature detection module is configured to detect a temperature signal of the battery pack and transmit the temperature signal to the monitor; the monitor is configured to control whether the active inverter transmits the AC signal to the power grid according to the temperature signal.

4. A capacity testing method, characterized in that, applied to the capacity testing device according to any one of claims 1-3. The capacity testing device includes an active inverter, a monitor, and a battery detection module. The active inverter and the battery detection module are both electrically connected to the battery pack. The active inverter is further electrically connected to the power grid. The monitor is electrically connected to the active inverter and the battery detection module. The method includes: the monitor controls the active inverter to invert a DC signal provided by the battery pack into an AC signal according to a second preset rule, so that the active inverter transmits the AC signal to the power grid; the second preset rule is: when the monitor controls the active inverter to transmit the AC signal to the power grid, the output power of the battery pack is a second power value, where the second power value is calculated from the initial data; the battery detection module detects the DC signal of the battery pack and transmits the DC signal to the monitor; wherein, the DC signal is the DC signal detected by the battery detection module during the discharge process of the battery pack; the monitor controls the active inverter to transmit the AC signal to the power grid according to the first preset rule according to the DC signal; the first preset rule is: when the monitor controls the active inverter to transmit the AC signal to the power grid, the output power of the battery pack is a first power value, where the first power value is calculated from the DC signal.

5. The capacity testing method according to claim 4, characterized in that, the method further includes: the monitor determines whether the battery pack has completed discharging according to the DC signal and a preset condition; if the battery pack has completed discharging, the monitor controls the active inverter to stop working; if the battery pack has not completed discharging, the monitor controls the active inverter to transmit the AC signal to the power grid according to the second preset rule.

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