Control system and power supply equipment

Abstract

The utility model relates to a control system and power supply equipment, and belongs to the technical field of energy storage control. The control system comprises a signal processing circuit. The first end of the signal processing circuit is used for receiving an optical signal; wherein the optical signal comprises a first optical signal, and the first optical signal is obtained based on a first electric signal output by a first power supply unit; the second end of the signal processing circuit is used for being in communication connection with a second power supply unit; wherein the first power supply unit and the second power supply unit are used for supplying power to load equipment, and the signal processing circuit is used for regulating and controlling the discharge efficiency of the second power supply unit in response to the optical signal. According to the control system of the utility model, the power supply efficiency of the control system can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage control, and more specifically, to a control system and a power supply device. Background Art

[0002] With the rapid development of energy storage devices, devices that store electrical energy, as a more common energy storage device, can be widely used in many fields such as home, industry, and transportation. At present, the first power supply and the second power supply equipped with a rectifier device in the existing control system can simultaneously power the load device in parallel. When the control system supplies power to the load device, the control system often controls the efficiency of power supply to the load device by collecting the electrical signal output by the power supply, but there are different delays in the first power supply and the second power supply feeding back the electrical signal to the control system. The power supply with a lower delay may supply power first, resulting in a lower efficiency of power supply to the load device. Utility Model Content

[0003] The embodiments of the present disclosure provide a control system and a power supply device, which can improve the operating stability of each power supply unit.

[0004] According to a first aspect of the utility model, there is provided a control system, the control system comprising a signal processing circuit;

[0005] The first end of the signal processing circuit is used to receive an optical signal; wherein the optical signal includes a first optical signal, and the first optical signal is obtained based on a first electrical signal output by a first power supply unit;

[0006] The second end of the signal processing circuit is used to communicate with the second power supply unit; wherein the first power supply unit and the second power supply unit are used to power a load device, and the signal processing circuit is used to adjust the discharge efficiency of the second power supply unit in response to the optical signal.

[0007] Optionally, the control system further includes a signal acquisition circuit;

[0008] A signal acquisition circuit, wherein the first end of each of the signal acquisition circuits is electrically connected to the output end of the corresponding power supply unit; the second end of each of the signal acquisition circuits is connected to the first end of the signal processing circuit via optical fiber communication; wherein the corresponding power supply unit is at least the first power supply unit.

[0009] Optionally, the signal processing circuit is further used to adjust the conversion efficiency of the rectifying device of the second power supply unit in response to the optical signal output by each of the signal acquisition circuits.

[0010] Optionally, the corresponding power supply unit is the first power supply unit or the second power supply unit.

[0011] Optionally, in the control system, a first number of the signal acquisition circuits is greater than or equal to a second number of the signal processing circuits.

[0012] Optionally, the rectifying device of the second power supply unit is a conversion circuit, the second power supply unit includes a first power supply source, a first end of the conversion circuit is electrically connected to the first power supply source, and a second end of the conversion circuit serves as an output end of the second power supply unit;

[0013] The first power supply unit includes a second power supply, and an output end of the second power supply serves as an output end of the first power supply unit.

[0014] Optionally, the signal acquisition circuit includes an analog signal acquisition circuit, an analog-to-digital conversion circuit and a first photoelectric conversion circuit; the first end of the analog signal acquisition circuit serves as the first end of the signal acquisition circuit, and the analog signal acquisition circuit is used to acquire a first electrical signal output by an output end of a corresponding power supply unit;

[0015] The second end of the analog signal acquisition circuit is electrically connected to the first end of the analog-to-digital conversion circuit, the second end of the analog-to-digital conversion circuit is electrically connected to the first end of the first photoelectric conversion circuit, and the analog-to-digital conversion circuit is used to convert the first electrical signal output by the analog signal acquisition circuit into a second electrical signal;

[0016] The second end of the first photoelectric conversion circuit serves as the second end of the signal acquisition circuit, and the first photoelectric conversion circuit is used to convert the second electrical signal output by the analog-to-digital conversion circuit into an optical signal and output it to the signal processing circuit.

[0017] Optionally, the signal processing circuit includes a second photoelectric conversion circuit, a signal analysis circuit and a digital signal processing circuit;

[0018] The first end of the second photoelectric conversion circuit serves as the first end of the signal processing circuit, the second end of the second photoelectric conversion circuit is electrically connected to the first end of the signal analysis circuit, and the second photoelectric conversion circuit is used to convert the optical signal output by each signal acquisition circuit into a third electrical signal;

[0019] The second end of the signal analysis circuit is electrically connected to the first end of the digital signal processing circuit, and the signal analysis circuit is used to convert the third electrical signal output by the second photoelectric conversion circuit into a fourth electrical signal;

[0020] The second end of the digital signal processing circuit serves as the second end of the signal processing circuit, and the digital signal processing circuit is used to convert the fourth electrical signal output by the signal analysis circuit into a fifth electrical signal representing a current value, and output the fifth electrical signal from the second end of the digital signal processing circuit to the rectifier device of the second power supply unit.

[0021] Optionally, the third end of the digital signal processing circuit is used to electrically connect to an external sampling device, and the digital signal processing circuit is also used to convert the fourth electrical signal output by the signal analysis circuit into a sixth electrical signal representing a voltage value, and output the sixth electrical signal from the third end of the digital signal processing circuit to the external sampling device.

[0022] According to the second aspect of the utility model, a power supply device is provided, which includes a first power supply unit, a second power supply unit, a storage device and a control device, wherein the control device is the control system described in the first aspect, and the control device includes a signal acquisition circuit and a signal processing circuit, and the signal acquisition circuit, the signal processing circuit, the first power supply unit and the second power supply unit are arranged in the storage device.

[0023] Optionally, the power supply device further includes a first controller and a second controller; the second controller is disposed in the storage device, the second controller is communicatively connected to a rectifier device of the second power supply unit, and the first controller is communicatively connected to the second controller;

[0024] The first controller outputs a start-up instruction to the second controller, and the second controller controls the first power supply unit and / or the second power supply unit to discharge in response to the start-up instruction.

[0025] Optionally, the storage device includes a first storage device and a second storage device; the first storage device is provided with the second controller, the second power supply unit, the signal acquisition circuit and the signal processing circuit, and the second storage device is provided with the second controller, the first power supply unit and the signal acquisition circuit.

[0026] Optionally, the second controller controls the power supply unit to discharge in response to the start-up instruction, including: the second controller located in the second storage device controls the first power supply unit to discharge at a first time node in response to the start-up instruction, and the second controller located in the first storage device controls the second power supply unit to discharge at a second time node in response to the start-up instruction; wherein the first time node is before the second time node.

[0027] One technical effect of the utility model is that the first end of the signal processing circuit is configured to receive an optical signal. The signal processing circuit can confirm and summarize the values ​​of the output currents of each power supply unit by receiving different optical signals, and then determine the corresponding current expected value and feed it back to the rectifier device of the second power supply unit, so that the rectifier device of the second power supply unit can quickly change the conversion efficiency according to the current expected value to achieve the output current of each power supply unit within a normal range, thereby improving the power supply efficiency of the control system.

[0028] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present utility model and, together with the description, are used to explain the principles of the present utility model.

[0030] Figure 1 is a block diagram of a control system according to an embodiment;

[0031] Figure 2 is a structural block diagram of a signal acquisition circuit according to an embodiment;

[0032] Figure 3 is a structural block diagram of a signal processing circuit according to an embodiment;

[0033] Figure 4 is a circuit diagram of a power supply device according to another embodiment;

[0034] Figure 5 is a circuit diagram of a power supply device according to another embodiment.

[0035] Description of the drawings:

[0036] Control system 100;

[0037] Signal acquisition circuit 10; analog signal acquisition circuit 11; analog-to-digital conversion circuit 12; first photoelectric conversion circuit 13;

[0038] Signal processing circuit 20; second photoelectric conversion circuit 21; signal analysis circuit 22; digital signal processing circuit 23; first output circuit 231; second output circuit 232;

[0039] Second power supply unit 200; second power supply source 210; conversion circuit 220; first power supply unit 300; first power supply source 310;

[0040] A first storage device 410; a second storage device 420;

[0041] A first controller 500 ; a second controller 600 ; a power grid 700 ; and a battery 8 . DETAILED DESCRIPTION

[0042] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0043] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0044] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0045] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0046] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0047] See also Figure 1 As shown, the control system 100 according to the embodiment of the present disclosure is described.

[0048] The control system 100 of the disclosed embodiment includes a signal processing circuit 20, wherein the first end of the signal processing circuit 20 is used to receive an optical signal; wherein the optical signal includes a first optical signal, and the first optical signal is obtained based on the first electrical signal output by the first power supply unit 300. The second end of the signal processing circuit 20 is used to communicate with the second power supply unit 200; wherein the first power supply unit 300 and the second power supply unit 200 are used to supply power to the load device. The signal processing circuit 20 is used to adjust the discharge efficiency of the second power supply unit 200 in response to the optical signal.

[0049] In some examples, there may be one or more first power supply units, there may be one or more second power supply units, and the first power supply unit or the second power supply unit may be a single battery 8, a battery pack composed of multiple batteries 8, or a battery 8 cluster, etc., which is not limited here.

[0050] In some examples, the first power supply unit and the second power supply unit may be connected in parallel or in series, which is not limited here. Figure 4As shown, a first power supply unit consisting of battery 8a-battery 8d, a first power supply unit consisting of battery 8e-battery 8h, and a second power supply unit consisting of battery 8i-battery 8m are connected in parallel.

[0051] In some instances, the discharge efficiency of the second power supply unit can be controlled in different ways, for example, controlling a certain number of batteries in the second power supply unit to operate to achieve the required discharge efficiency, or for another example, controlling the rectifier device of the second power supply unit to achieve the required discharge efficiency.

[0052] In some examples, the optical signal may be obtained by collecting the current signal outputted from the output end of the power supply unit through some existing current sampling circuits, and then converting the current signal into the optical signal through the existing photoelectric conversion circuit.

[0053] In some examples, the communication connection may include a wireless communication connection and a wired communication connection, the wireless communication being, for example, wireless short-range communication such as Bluetooth, and the wired communication being, for example, communication using a transmission medium such as a cable or optical fiber.

[0054] In some examples, the signal processing circuit may receive the first optical signal or the second optical signal, which is not limited here. The second optical signal may be a current signal output by a current sampling circuit configured by the second power supply unit.

[0055] In some examples, the signal processing circuit 20 may be one or more, which is not limited here. When there is one signal processing circuit 20, the signal processing circuit 20 may receive different optical signals, which reflect the first electrical signal output by the corresponding power supply unit. The signal processing circuit 20 may determine the value of the total current output by the control system 100 to the load device based on these optical signals.

[0056] When there are multiple signal processing circuits 20, one of the signal processing circuits can be used as the main signal processing circuit, and the remaining signal processing circuits can be used as the secondary signal processing circuits 2. The secondary signal processing circuit can send a part of the optical signal to the main signal processing circuit, and the main signal processing circuit can determine the value of the total current output by the control system 100 to the load device based on the other part of the optical signal received and the optical signal sent by the secondary signal processing circuit. The first electrical signal output by the first power supply unit can be a current signal.

[0057] In some embodiments, the second power supply unit can directly feed back the second electrical signal output by the second power supply unit to the signal processing circuit. For example, the rectifier device of the second power supply unit is a DC-DC conversion circuit, and the DC-DC conversion circuit has a current collection function. The DC-DC conversion circuit can directly feed back the collected current signal to the signal processing circuit.

[0058] In some embodiments, the control system 100 further includes a signal acquisition circuit 10, wherein the first end of each signal acquisition circuit 10 is electrically connected to the output end of the corresponding power supply unit, and the first end of the signal processing circuit 20 is connected to the second end of each signal acquisition circuit 10 via optical fiber communication. The corresponding power supply unit is at least the first power supply unit 300. By providing the signal acquisition circuit 10, and each signal acquisition circuit 10 and the signal processing circuit 20 are connected via optical fiber communication, the speed at which the signal processing circuit 20 obtains the first electrical signal output by the corresponding power supply unit is effectively improved.

[0059] In some embodiments, the signal processing circuit 20 is further used to adjust the conversion efficiency of the rectifier device of the second power supply unit 200 in response to the optical signal output by each signal acquisition circuit 10 .

[0060] In some examples, a first end of a signal acquisition circuit 10 can be connected to an output end of a power supply unit through optical fiber communication, that is, the signal acquisition circuit 10 and the power supply unit correspond one to one, so that the signal acquisition circuit 10 and the power supply unit can be set in the same storage device to improve the safety factor of the control system 100. The storage device is, for example, a battery box or a battery cabinet, etc., which is not limited here.

[0061] In some examples, such as Figure 4 As shown, the load device may be a power grid 700, and the power grid 700 may charge and discharge each power supply unit through the energy storage converter PCS.

[0062] In some examples, the second power supply unit 200 includes a second power supply source 210 and a rectifier device. The second power supply source 210 is, for example, a single battery 8, a battery pack composed of multiple batteries 8, or a battery 8 cluster, etc. The rectifier device can be a DC-DC conversion circuit, and the signal processing circuit 20 can be communicatively connected to the control end of the DC-DC conversion circuit.

[0063] In some examples, such as Figure 4As shown, the signal acquisition circuit 10a can collect the current signal of the output end of the battery string composed of battery 8a-battery 8d, the signal acquisition circuit 10b can collect the current signal of the output end of the battery string composed of battery 8e-battery 8h, and the signal acquisition circuit 10c can collect the current signal of the output end of the battery string composed of battery 8i-battery 8m. The signal acquisition circuit 10a, the signal acquisition circuit 10b and the signal acquisition circuit 10c can output the collected current signals to the signal processing circuit 20, and the signal processing circuit 20 can summarize these current signals and obtain a fifth electrical signal, and feed the fifth electrical signal back to the conversion circuit 220a-conversion circuit 220d, so that the conversion circuit 220a-conversion circuit 220d can adjust the conversion efficiency of the conversion circuit 220a-conversion circuit 220d according to the current value represented by the fifth electrical signal. That is, when the battery string consisting of battery 8a-battery 8d indicated by the fifth electrical signal has an overcurrent or the battery string consisting of battery 8e-battery 8h indicated by the fifth electrical signal has an overcurrent, the signal processing circuit 20 increases the conversion efficiency of the conversion circuit 220a-conversion circuit 220d.

[0064] In other words, the signal acquisition circuit 10 can collect the output current of the corresponding power supply unit, and the signal processing circuit 20 can summarize the values ​​of the output currents of each power supply unit through the optical signals output by each signal acquisition circuit 10, and determine the corresponding current expected value to feed back to the rectifier device of the second power supply unit 200, so that the rectifier device of the second power supply unit 200 can quickly change the conversion efficiency according to the current expected value to ensure that the output current of each power supply unit is within a normal range, thereby improving the power supply efficiency of the control system 100.

[0065] In some embodiments, there are multiple signal processing circuits 20 ; in the control system 100 , a first number of signal acquisition circuits 10 is greater than or equal to a second number of signal processing circuits 20 .

[0066] In some examples, such as Figure 5 As shown, the signal processing circuit 20a-signal processing circuit 20d can be connected through a communication optical fiber, and the signal acquisition circuit 10a-signal acquisition circuit 10f can output the collected optical signals to the corresponding signal processing circuits 20 respectively, that is, the signal acquisition circuit 10a-signal acquisition circuit 10c outputs the collected optical signals to the signal processing circuit 20a, the signal acquisition circuit 10d outputs the collected optical signals to the signal processing circuit 20b, and the signal processing circuit 20a-signal processing circuit 20d sends the acquired optical signals to the indicated signal processing circuit 20, and the indicated signal processing circuit 20 can be any one of the signal processing circuits 20a-signal processing circuits 20d.

[0067] In other words, in some power supply scenarios, some signal acquisition circuits 10 can collect the current of power supply units that are not equipped with rectifying devices. These signal acquisition circuits 10 can output optical signals to signal processing circuits 20 in other storage devices so that the signal processing circuits 20 can adjust the output current of all power supply units to the expected value, so that the control system 100 can be suitable for different power supply scenarios.

[0068] In some embodiments, the rectifier device of the second power supply unit 200 is a conversion circuit 220, the second power supply unit 200 includes a second power supply source 210, the first end of the conversion circuit 220 is electrically connected to the second power supply source 210, and the second end of the conversion circuit 220 serves as the output end of the second power supply unit 200; the power supply unit also includes a first power supply unit 300, the first power supply unit 300 includes a first power supply source 310, and the output end of the first power supply source 310 serves as the output end of the first power supply unit 300.

[0069] In some examples, the conversion circuit 220 is, for example, a DC-DC conversion circuit, and the DC-DC conversion circuit can be a boost circuit or a buck circuit, which is not limited here.

[0070] In some examples, such as Figure 4 As shown, a battery string consisting of battery 8a-battery 8d is the first power supply 310, a battery string consisting of battery 8e-h is also the first power supply 310, and battery 88i-battery 88h is the second power supply 210. Taking the second power supply 210 as battery 88i as an example, the rectifier device of battery 88i is the conversion circuit 220a.

[0071] In other words, the control system 100 can be adapted to different power supply units to expand the application space of the control system 100 .

[0072] In some embodiments, Figure 2 As shown, the signal acquisition circuit 10 includes an analog signal acquisition circuit 11, an analog-to-digital conversion circuit 12 and a first photoelectric conversion circuit 13; the first end of the analog signal acquisition circuit 11 serves as the first end of the signal acquisition circuit 10, and the analog signal acquisition circuit 11 is used to acquire a first electrical signal output by the output end of the corresponding power supply unit; the second end of the analog signal acquisition circuit 11 is electrically connected to the first end of the analog-to-digital conversion circuit 12, the second end of the analog-to-digital conversion circuit 12 is electrically connected to the first end of the first photoelectric conversion circuit 13, and the analog-to-digital conversion circuit 12 is used to convert the first electrical signal output by the analog signal acquisition circuit 11 into a second electrical signal; the second end of the first photoelectric conversion circuit 13 serves as the second end of the signal acquisition circuit 10, and the first photoelectric conversion circuit 13 is used to convert the second electrical signal output by the analog-to-digital conversion circuit 12 into an optical signal and output it to the signal processing circuit 20.

[0073] In some examples, such as Figure 4 As shown, taking the signal acquisition circuit 10b as an example, the analog signal acquisition circuit 11 of the signal acquisition circuit 10b may include a mutual inductor CT and a sampling conditioning circuit, wherein the first end of the mutual inductor CT is electrically connected to the output end of a battery string composed of battery 8e-battery 8h, the second end of the mutual inductor CT is electrically connected to the first end of the sampling conditioning circuit, and the second end of the sampling conditioning circuit is electrically connected to the analog-to-digital conversion circuit 12, so that the analog-to-digital conversion circuit 12 receives a first electrical signal representing the output current of a battery string composed of battery 8e-battery 8h, and the first electrical signal may be an analog signal. The sampling conditioning circuit is an existing sampling conditioning circuit, which will not be specifically described here.

[0074] In some examples, the analog-to-digital conversion circuit 12 may be a digital signal processor (DSP), which may receive a sampling trigger square wave signal sent by a signal analysis circuit 22 in a signal processing circuit 20 according to a set period through an optical fiber. The set period is, for example, 50ms, 100ms, or 500ms. After the digital signal processor receives a sampling trigger square wave signal, the first electrical signal output by the sampling conditioning circuit may be converted into a second electrical signal. The second electrical signal is a digital signal. The first photoelectric conversion circuit 13 may be an existing photoelectric conversion module to convert the second electrical signal into an optical signal.

[0075] In other words, by providing the signal acquisition circuit 10 , the output current at the output end of the power supply unit can be converted into an optical signal with a faster transmission rate, so as to improve the response speed of the control system 100 in adjusting the rectifying device of the second power supply unit 200 .

[0076] In some embodiments, Figure 3 As shown, the signal processing circuit 20 includes a second photoelectric conversion circuit 21, a signal analysis circuit 22 and a digital signal processing circuit 23; the first end of the second photoelectric conversion circuit 21 serves as the first end of the signal processing circuit 20, the second end of the second photoelectric conversion circuit 21 is electrically connected to the first end of the signal analysis circuit 22, and the second photoelectric conversion circuit 21 is used to convert the optical signal output by each signal acquisition circuit 10 into a third electrical signal; the second end of the signal analysis circuit 22 is electrically connected to the first end of the digital signal processing circuit 23, and the signal analysis circuit 22 is used to convert the third electrical signal output by the second photoelectric conversion circuit 21 into a fourth electrical signal; the second end of the digital signal processing circuit 23 serves as the second end of the signal processing circuit 20, and the digital signal processing circuit 23 is used to convert the fourth electrical signal output by the signal analysis circuit 22 into a fifth electrical signal representing a current value, and output the fifth electrical signal from the second end of the digital signal processing circuit 23 to the rectifier device of the second power supply unit 200.

[0077] In some examples, the second photoelectric conversion circuit 21 may be an existing photoelectric conversion module to convert the optical signal into a third electrical signal to meet the requirements of the signal analysis circuit 22 .

[0078] In some examples, the signal analysis circuit 22 may be a field programmable gate array processor (Field-Programmable Gate Array, FPGA). The signal analysis circuit 22 may send a sampling trigger square wave signal to different analog-to-digital conversion circuits 12 through different optical fibers according to a set period. The signal analysis circuit 22 may also convert the third electrical signal output by the second photoelectric conversion circuit 21 into a fifth electrical signal representing the desired value of the output current of the second power supply unit 200, and send the fifth electrical signal to the rectifier device of the second power supply unit 200 through the first output circuit 231 of the digital signal processing circuit 23, that is, the rectifier device of the second power supply unit 200 may adjust the conversion efficiency of the rectifier device of the second power supply unit 200 according to the fifth electrical signal, so that the output current of each power supply unit reaches the desired value. Among them, the first output circuit 231 may be a communication port for outputting digital signals.

[0079] The information analysis circuit is provided with a corresponding current sharing algorithm to convert the third electrical signal output by the second photoelectric conversion circuit 21 into a fifth electrical signal representing the desired value of the output current of the second power supply unit 200. The specific expression of the current sharing algorithm is as follows:

[0080]

[0081] In the formula, I target_i is the expected value of the output current of the second power supply unit 200i; Δu i is the difference between the maximum voltage and the expected voltage of the second power supply unit 200i; V target is the expected voltage of the second power supply unit 200i; V i-cell I is the voltage of the second power supply unit 200i; sum is the sum of the output currents of the second power supply unit 200i. When the control system 100 is working, the information processing circuit can sample and count the sum of the output currents of the second power supply unit 200i at high speed. sum , the expected value of the output current calculated in real time can enable the control system 100 to achieve the current sharing effect more quickly.

[0082] In other words, by setting the signal processing circuit, the expected value of the output current of the second power supply unit 200 can be obtained, so that the rectifier device of the second power supply unit 200 can adjust the conversion efficiency according to the expected value, so that the control system 100 can achieve the current equalization effect more quickly.

[0083] In some embodiments, the third end of the digital signal processing circuit 23 is used to electrically connect to an external sampling device. The digital signal processing circuit 23 is also used to convert the fourth electrical signal output by the signal analysis circuit 22 into a sixth electrical signal representing a voltage value, and output the sixth electrical signal from the third end of the digital signal processing circuit 23 to the external sampling device.

[0084] In some examples, such as Figure 3 As shown, the external sampling device can be electrically connected to the second output circuit 232, the output end of the second output circuit 232 is the third end of the digital signal processing circuit 23, the second output circuit 232 can include a digital analog converter (Digital Audio Compress, DAC) and an amplifier, the first end of the digital analog converter is electrically connected to the signal analysis circuit 22, the second end of the digital analog converter is electrically connected to the first end of the amplifier, and the second end of the amplifier serves as the output end of the second output circuit 232 to output an analog signal representing a voltage value. The external sampling device is, for example, a voltage detection device, which is not limited here.

[0085] In other words, by setting the third terminal of the digital signal processing circuit 23 , it is convenient to determine the value of the output voltage of the control system 100 .

[0086] According to the power supply device provided in the embodiment of the present disclosure, the power supply device includes a power supply unit, a storage device and a control device. The energy storage device is the control system 100 of any of the above embodiments. The control device includes a signal acquisition circuit 10 and a signal processing circuit 20. The signal circuit device, the signal processing circuit 20 and the power supply unit are arranged in the storage device.

[0087] In other words, the power supply device is configured with the control system 100, which can enhance the rapid current sharing output of each power supply unit of the power supply device, so as to enhance the stability of the power supply device.

[0088] In some embodiments, the power supply device also includes a first controller 500 and a second controller 600; the second controller 600 is arranged in a storage device, the second controller 600 is communicatively connected to the rectifier device of the second power supply unit 200, and the first controller 500 is communicatively connected to the second controller 600; wherein, the first controller 500 outputs a start-up instruction to the second controller 600, and the second controller 600 controls the power supply unit to discharge in response to the start-up instruction.

[0089] In some examples, such as Figure 4As shown, the first controller 500 may include an energy management system EMS, a cabinet parallel control BCPC, a switch SW1 and a switch SW2 electrically connected via Ethernet, a first end of the energy management system EMS is electrically connected to a first end of the switch SW1, a second end of the switch SW1 is electrically connected to a first end of the cabinet parallel control BCPC, a second end of the cabinet parallel control BCPC is electrically connected to a first end of the switch SW2, and a second end of the switch SW2 may be connected to a second controller 600, which may be an embedded microcontroller unit (Embedded Microcontroller Unit, EMCU). The second controller 600 may be connected to a rectifier device of the second power supply unit 200 in communication, so that the rectifier device of the second power supply unit 200 performs DC-DC conversion.

[0090] In other words, by providing the first controller 500 and the second controller 600, the utilization efficiency of the power supply unit's electric energy can be effectively improved while effectively reducing the overcurrent of the power supply unit.

[0091] In some embodiments, the power supply unit includes a second power supply unit 200 and a first power supply unit 300; the storage device includes a first storage device 410 and a second storage device 420; the first storage device 410 is provided with a second controller 600, a second power supply unit 200, a signal acquisition circuit 10 and a signal processing circuit 20, and the second storage device 420 is provided with a second controller 600, a first power supply unit 300 and a signal acquisition circuit 10.

[0092] In some examples, such as Figure 4 As shown, the first storage device 410 can store batteries 8i-8m and conversion circuits 220a-220d, the second storage device 420a can store batteries 8a-8d, and the second storage device 420b can store batteries 8e-8h. In other words, by arranging different power supply units in different storage devices, the modular management of the power supply unit by the power supply device is effectively improved.

[0093] In some embodiments, the second controller 600 controls the power supply unit to discharge in response to a start-up instruction, including: the second controller 600 located in the second storage device 420 controls the first power supply unit 300 to discharge at a first time node in response to the start-up instruction, and the second controller 600 located in the first storage device 410 controls the second power supply unit 200 to discharge at a second time node in response to the start-up instruction; wherein the first time node is before the second time node.

[0094] In some examples, when the first controller 500 instructs to start each battery 8 in sequence, the first controller 500 distinguishes the storage device equipped with a rectifier according to a special enable flag, and first starts the power supply unit in the storage device not equipped with a rectifier, that is, at the first time node, controls the first power supply unit 300 to discharge, and then controls the power supply units in the storage device equipped with a rectifier to start in a specific order, that is, at the second time node, controls the second power supply unit 200 to discharge. In addition, each power supply unit can be started after an interval of 30s. At the same time, the signal acquisition circuit 10 is started synchronously, and the signal processing circuit 20 synchronously sends a sampling trigger square wave signal to collect the sum of the output currents of each power supply unit. If an overcurrent occurs in a power supply unit in a storage device not equipped with a rectifier, the signal processing circuit 20 can control the rectifier of the second power supply unit 200 to work.

[0095] In some examples, in order to further improve the stability of the power supply device, the storage device includes a third storage device, and the third storage device is provided with a second power supply unit 200, a signal acquisition circuit 10 and a signal processing circuit 20. That is, the rectifier device of the second power supply unit 200 of the third storage device is controlled by the signal processing circuit 20 so that the output current of the power supply device reaches the expected value.

[0096] In some embodiments, in order to further expand the application scenarios of the power supply device, the storage device includes a fourth storage device and a fifth storage device; the fourth storage device is provided with a signal processing circuit 20, and the fifth storage device is provided with a second power supply unit 200 and a signal acquisition circuit 10. That is to say, when the power supply units in the power supply device are all second power supply units 200, an additional fourth storage device can be provided, and the fourth storage device is provided with a signal processing circuit 20 to control the rectifier device of the second power supply unit 200 of the fifth storage device to perform DC-DC conversion, so that the output current of the power supply device reaches the expected value.

[0097] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A control system, characterized in that: The control system includes a signal processing circuit; The first end of the signal processing circuit is used to receive an optical signal; wherein the optical signal includes a first optical signal, and the first optical signal is obtained based on a first electrical signal output by a first power supply unit; The second end of the signal processing circuit is used to communicate with the second power supply unit; wherein the first power supply unit and the second power supply unit are used to power the load device, and the signal processing circuit is used to adjust the discharge efficiency of the second power supply unit in response to the optical signal.

2. The control system according to claim 1, characterized in that: The control system also includes a signal acquisition circuit; A signal acquisition circuit, wherein the first end of each of the signal acquisition circuits is electrically connected to the output end of the corresponding power supply unit; the second end of each of the signal acquisition circuits is connected to the first end of the signal processing circuit via optical fiber communication; wherein the corresponding power supply unit is at least the first power supply unit.

3. The control system according to claim 2, characterized in that: The signal processing circuit is also used to adjust the conversion efficiency of the rectifying device of the second power supply unit in response to the optical signal output by each of the signal acquisition circuits.

4. The control system according to claim 2, characterized in that: The corresponding power supply unit is the first power supply unit or the second power supply unit.

5. The control system according to claim 2, characterized in that: In the control system, a first number of the signal acquisition circuits is greater than or equal to a second number of the signal processing circuits.

6. The control system according to claim 1, characterized in that: The rectifier device of the second power supply unit is a conversion circuit, the second power supply unit includes a first power supply source, a first end of the conversion circuit is electrically connected to the first power supply source, and a second end of the conversion circuit serves as an output end of the second power supply unit; The first power supply unit includes a second power supply, and an output end of the second power supply serves as an output end of the first power supply unit.

7. The control system according to any one of claims 2 to 4, characterized in that: The signal acquisition circuit includes an analog signal acquisition circuit, an analog-to-digital conversion circuit and a first photoelectric conversion circuit; the first end of the analog signal acquisition circuit serves as the first end of the signal acquisition circuit, and the analog signal acquisition circuit is used to acquire a first electrical signal output by an output end of a corresponding power supply unit; The second end of the analog signal acquisition circuit is electrically connected to the first end of the analog-to-digital conversion circuit, the second end of the analog-to-digital conversion circuit is electrically connected to the first end of the first photoelectric conversion circuit, and the analog-to-digital conversion circuit is used to convert the first electrical signal output by the analog signal acquisition circuit into a second electrical signal; The second end of the first photoelectric conversion circuit serves as the second end of the signal acquisition circuit, and the first photoelectric conversion circuit is used to convert the second electrical signal output by the analog-to-digital conversion circuit into an optical signal and output it to the signal processing circuit.

8. The control system according to any one of claims 1 to 6, characterized in that: The signal processing circuit includes a second photoelectric conversion circuit, a signal analysis circuit and a digital signal processing circuit; The first end of the second photoelectric conversion circuit serves as the first end of the signal processing circuit, the second end of the second photoelectric conversion circuit is electrically connected to the first end of the signal analysis circuit, and the second photoelectric conversion circuit is used to convert each of the optical signals into a third electrical signal; The second end of the signal analysis circuit is electrically connected to the first end of the digital signal processing circuit, and the signal analysis circuit is used to convert the third electrical signal output by the second photoelectric conversion circuit into a fourth electrical signal; The second end of the digital signal processing circuit serves as the second end of the signal processing circuit, and the digital signal processing circuit is used to convert the fourth electrical signal output by the signal analysis circuit into a fifth electrical signal representing a current value, and output the fifth electrical signal from the second end of the digital signal processing circuit to the rectifier device of the second power supply unit.

9. The control system according to claim 8, characterized in that: The third end of the digital signal processing circuit is used to electrically connect to an external sampling device. The digital signal processing circuit is also used to convert the fourth electrical signal output by the signal analysis circuit into a sixth electrical signal representing a voltage value, and output the sixth electrical signal from the third end of the digital signal processing circuit to the external sampling device.

10. A power supply device, characterized in that: The power supply equipment includes a first power supply unit, a second power supply unit, a storage device and a control device, the control device is the control system according to any one of claims 1 to 9, the control device includes a signal acquisition circuit and a signal processing circuit, the signal acquisition circuit, the signal processing circuit, the first power supply unit and the second power supply unit are arranged in the storage device.

11. The power supply device according to claim 10, characterized in that: The power supply device further includes a first controller and a second controller; the second controller is disposed in the storage device, the second controller is communicatively connected to the rectifier device of the second power supply unit, and the first controller is communicatively connected to the second controller; The first controller outputs a start-up instruction to the second controller, and the second controller controls the first power supply unit and / or the second power supply unit to discharge in response to the start-up instruction.

12. The power supply device according to claim 11, characterized in that: The storage device includes a first storage device and a second storage device; the first storage device is provided with the second controller, the second power supply unit, the signal acquisition circuit and the signal processing circuit, and the second storage device is provided with the second controller, the first power supply unit and the signal acquisition circuit.

13. The power supply device according to claim 12, characterized in that: The second controller controls the power supply unit to discharge in response to the start-up instruction, including: the second controller located in the second storage device controls the first power supply unit to discharge at a first time node in response to the start-up instruction, and the second controller located in the first storage device controls the second power supply unit to discharge at a second time node in response to the start-up instruction; wherein the first time node is before the second time node.

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