Novel optical storage system energy storage battery voltage detection circuit and control method

Abstract

The invention discloses a novel optical storage system energy storage battery voltage detection circuit and a control method. According to the novel optical storage system energy storage battery voltage detection circuit, a voltage division switching circuit is adopted, so that the use of a high-voltage divider resistor is reduced, and the hardware cost and the isolation cost are reduced. Meanwhile, through the design of the differential amplification circuit and the isolation amplification circuit, the stability and the anti-interference capability of signal processing are improved. In addition, according to the voltage detection circuit and the control method, quick and accurate power-on starting logic judgment can be achieved, and it is ensured that the optical storage system can operate reliably under various conditions. In conclusion, the performance of the optical storage system is improved, and a more economical and efficient electric power solution is provided for users.

Description

Technical Field

[0001] The present invention relates to the field of electrical engineering technology, and in particular to a novel photovoltaic energy storage system energy storage battery voltage detection circuit and control method. Background Art

[0002] Photovoltaic energy storage system (PV energy storage system) is a system that combines photovoltaic power generation with energy storage technology. It is mainly composed of photovoltaic modules and DC voltage conversion system, energy storage battery box, bidirectional inverter and related control system. The main functions of PV energy storage system include:

[0003] (1) Utilization of renewable energy: The photovoltaic storage system can convert solar energy into electrical energy, realize the utilization of clean energy, and reduce dependence on fossil fuels.

[0004] (2) Power supply security: Through energy storage equipment, the system can provide electricity when there is insufficient sunlight or when power demand is peak, ensuring the stability of power supply.

[0005] (3) Peak shaving: The photovoltaic storage system can store excess electricity when electricity demand is low and release it when demand is high, providing regulation capabilities for the power grid.

[0006] (4) Self-sufficiency: Users can achieve self-sufficiency through the solar energy storage system and reduce electricity expenses, especially in areas or time periods with higher electricity prices.

[0007] (5) Emergency backup power supply: In the event of a power outage or natural disaster, the solar energy storage system can provide backup power to enhance the risk resistance of the home or business.

[0008] Regarding the voltage detection circuit and control of the energy storage battery in the photovoltaic storage system, the commonly used method in engineering is: use the negative electrode PACK- of the energy storage battery and the end LINK- of the shunt as the reference ground, use multi-channel resistor voltage division, step down the positive electrode PACK+ of the energy storage battery and the total positive relay output voltage LINK+, and then pass them into the operational amplifier circuit for signal processing, and isolate the analog or digital signal after signal processing, and then perform logic control for the relevant relays.

[0009] The problems with the above methods are:

[0010] (1) Multiple high-voltage voltage-dividing resistors are required, which not only increases the hardware cost, but also introduces a large number of high-voltage wires into the signal processing circuit, increasing the isolation cost and volume of the hardware.

[0011] (2) Multiple signal processing circuits and isolation circuits are required, which increases the cost and complexity of the signal processing circuit.

[0012] (3) Signal processing circuit The negative electrode PACK- of the energy storage battery or the end LINK- of the shunt is the reference ground, which is easily interfered by high-frequency and large-current signals, resulting in reduced sampling accuracy. Summary of the invention

[0013] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0014] In view of the above existing problems, the present invention is proposed.

[0015] Therefore, the present invention provides a novel photovoltaic energy storage system energy storage battery voltage detection circuit and control method, which can solve the problems mentioned in the background technology.

[0016] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0017] In a first aspect, the present invention provides a novel photovoltaic energy storage system energy storage battery voltage detection circuit, comprising:

[0018] Voltage division switching circuit, differential amplifier circuit, isolation amplifier circuit and differential to single-ended circuit;

[0019] The voltage division switching circuit includes a plurality of resistors, a plurality of capacitors, a plurality of diodes and a plurality of photo-controlled relays;

[0020] The voltage division switching circuit further includes a first control terminal, a second control terminal, a third control terminal and a fourth control terminal corresponding to the first terminal, the second terminal, the third terminal and the fourth terminal.

[0021] As a preferred solution of the novel photovoltaic energy storage system energy storage battery voltage detection circuit of the present invention, the voltage division switching circuit further includes:

[0022] By controlling the parameters of the first control terminal, the second control terminal, the third control terminal and the fourth control terminal, a voltage value between any two terminals among the first terminal, the second terminal, the third terminal and the fourth terminal is obtained.

[0023] As a preferred solution of the novel photovoltaic storage system energy storage battery voltage detection circuit described in the present invention, it also includes: presetting a first power-on startup logic, and the first power-on startup logic is used to determine whether the photovoltaic storage system energy storage battery is powered on normally.

[0024] As a preferred solution of the novel photovoltaic storage system energy storage battery voltage detection circuit of the present invention, wherein: the first power-on startup logic includes: four judgment logics;

[0025] Set the judgment logic order according to requirements;

[0026] The judgment logic includes maintenance switch fault judgment, total negative relay fault judgment, pre-charge relay fault judgment and total positive relay fault judgment.

[0027] As a preferred solution of the novel photovoltaic energy storage system energy storage battery voltage detection circuit described in the present invention, the differential amplifier circuit includes an operational amplifier and a resistor connected in parallel to the operational amplifier, and a voltage regulator diode connected in parallel to the resistor.

[0028] As a preferred solution of the novel photovoltaic energy storage system energy storage battery voltage detection circuit described in the present invention, the isolation amplifier circuit includes an isolation amplifier and a resistor connected between the differential amplifier circuit and the isolation amplifier circuit.

[0029] As a preferred solution of the novel photovoltaic energy storage system energy storage battery voltage detection circuit described in the present invention, the control ends of the photo-controlled relay are respectively the first control terminal, the second control terminal, the third control terminal and the fourth control terminal.

[0030] In a second aspect, the present invention provides a novel control method for a voltage detection circuit of a photovoltaic energy storage system, comprising:

[0031] Establishing a target detection circuit and powering on the target detection circuit;

[0032] A first power-on control logic is preset, and a first power-on control logic judgment is performed according to an actual value generated after the target detection circuit is powered on. The first power-on control logic includes four judgment logics, and the judgment logic includes a maintenance switch fault judgment, a total negative relay fault judgment, a pre-charge relay fault judgment, and a total positive relay fault judgment;

[0033] The target detection circuit is controlled according to the first power-on control logic judgment result.

[0034] In a third aspect, the present invention provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above-mentioned method when executing the computer program.

[0035] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the method described above when executed by a processor.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention proposes a novel photovoltaic storage system energy storage battery voltage detection circuit and control method, which can effectively reduce hardware costs, simplify circuit design, and improve the accuracy and reliability of signal processing. By adopting a voltage-dividing switching circuit, the use of high-voltage voltage-dividing resistors is reduced, thereby reducing hardware costs and isolation costs. At the same time, through the design of differential amplifier circuits and isolation amplifier circuits, the stability and anti-interference ability of signal processing are improved. In addition, the voltage detection circuit and control method of the present invention can also realize fast and accurate power-on startup logic judgment, ensuring that the photovoltaic storage system can operate reliably under various circumstances. In summary, the present invention not only improves the performance of the photovoltaic storage system, but also provides users with a more economical and efficient power solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0038] Figure 1 A schematic diagram of the circuit structure of a novel photovoltaic energy storage system energy storage battery voltage detection circuit and control method provided by an embodiment of the present invention;

[0039] Figure 2 An overall circuit diagram of a photovoltaic system energy storage battery voltage detection circuit, which is a novel photovoltaic system energy storage battery voltage detection circuit and control method provided by one embodiment of the present invention;

[0040] Figure 3 A schematic diagram of the first power-on control logic of a novel photovoltaic energy storage system energy storage battery voltage detection circuit and control method provided by an embodiment of the present invention;

[0041] Figure 4 An internal structural diagram of a computer device for a novel photovoltaic energy storage system energy storage battery voltage detection circuit and control method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0043] Example 1

[0044] Reference Figure 1-Figure 4 , which is the first embodiment of the present invention, provides a novel photovoltaic energy storage system energy storage battery voltage detection circuit and control method, including:

[0045] There are some problems in the related technologies, such as complex circuit design, low signal processing accuracy, poor anti-interference ability, and inaccurate power-on startup logic judgment, etc. These problems not only increase the hardware cost, but also may affect the stability and reliability of the solar storage system.

[0046] The present application provides a detection circuit and a control method that can effectively solve the above-mentioned problems. Next, multiple embodiments will be combined to explain in detail how to implement the design of the voltage detection circuit of the energy storage battery of the novel photovoltaic storage system;

[0047] Figure 1 The schematic diagram of the circuit structure of a novel photovoltaic energy storage system energy storage battery voltage detection circuit and control method is shown, including: a voltage division switching circuit, a differential amplifier circuit, an isolation amplifier circuit and a differential to single-ended circuit;

[0048] In an embodiment of the present application, the voltage divider switching circuit includes a plurality of resistors, a plurality of capacitors, a plurality of diodes and a plurality of photo-controlled relays; the voltage divider switching circuit also includes a first control terminal, a second control terminal, a third control terminal and a fourth control terminal corresponding to the first terminal, the second terminal, the third terminal and the fourth terminal.

[0049] In an optional implementation, there may be many types of circuits for the voltage divider switching circuit, including but not limited to transistor circuits, field effect transistor circuits, analog switch circuits, etc. There are also many types of voltage divider switching circuits designed by using a plurality of resistors, a plurality of capacitors, a plurality of diodes, and a plurality of photo-controlled relays, and they may be flexibly adjusted according to actual application requirements. For example, by adjusting the resistance value of the resistor and the capacitance value of the capacitor, the voltage divider ratio and response speed of the circuit may be changed to adapt to different voltage detection ranges and accuracy requirements.

[0050] In an optional implementation, in the differential amplifier circuit, the operational amplifier is used to amplify the differential signal, while the parallel resistor and the voltage regulator diode are used to stabilize the circuit's operating point and provide the necessary bias voltage. By carefully designing the parameters of these components, the linearity and temperature stability of the circuit can be further improved, thereby ensuring the accuracy of voltage detection.

[0051] In an optional implementation, the design of the isolation amplifier circuit focuses on improving the isolation performance of the circuit to prevent the high voltage part from interfering with the low voltage part. The isolation amplifier usually uses isolation components such as an optical coupler or a transformer, and the resistor connected between the differential amplifier circuit and the isolation amplifier circuit is used to match the impedance and reduce the loss during signal transmission.

[0052] In the embodiments of the present application, the present application is applicable to Figure 2 The energy storage battery voltage detection and power-on logic control of the photovoltaic storage system shown in the figure are mainly used to detect the relevant voltages of the energy storage battery and the system in real time, provide reliable voltage reference values ​​for power-on logic control and status monitoring, and realize reliable power-on control. Figure 2 As shown, multiple battery modules in the battery box are divided into two parts by the maintenance switch. Here, the maintenance switch is used to divide the battery module into two parts during system maintenance to avoid accidental short circuit to form a loop and affect the reliable operation of the system.

[0053] In the embodiment of the present application, the positive pole of the battery module is the PACK+ terminal, and the negative pole is the PACK- terminal; the PACK+ terminal is respectively connected to two relays: the total positive relay Relay_mp1 and the pre-charge relay Relay_pp1; the other end of Relay_mp1 is the LINK+ terminal, which is connected to the positive input of the bidirectional inverter; the other end of Relay_pp1 is connected to the pre-charge resistor Res_precharge; the other end of the pre-charge resistor Res_precharge is connected to the LINK+ terminal; the control terminals of Relay_mp1 and Relay_pp1 are main_p_r and precharge_r respectively. The output of the PACK- terminal is connected to the total negative relay Relay_mn1; the other end of the total negative relay Relay_mn1 is connected to the shunt Shunt_n1; the shunt Shunt_n1 is used to measure the total output current I of the energy storage battery bat ; The control signal of the main negative relay Relay_mn1 is main_n_r; The other end of the shunt is the LINK- terminal, which is connected to the negative input of the bidirectional inverter; The output signal of the shunt Shunt_n1 is nI bat+ and nI bat- .

[0054] In an optional implementation, the voltage-dividing switching circuit may have several control terminals, but each control terminal corresponds to one controllable terminal.

[0055] In an optional implementation, the voltage-dividing switching circuit can also obtain voltage values ​​between different terminals according to the actual number of control terminals in the circuit, so as to perform fault judgment through different voltage values.

[0056] In an optional embodiment, the main functions of the photovoltaic energy storage system energy storage battery voltage detection circuit and control method are as follows:

[0057] (1) Detect the voltage between the PACK+ terminal and the PACK- terminal to determine whether the maintenance switch is correctly connected.

[0058] (2) Detect the voltage between the PACK+ terminal and the LINK- terminal to determine whether the main negative relay Relay_mn1 is correctly closed / opened.

[0059] (3) Detect the voltage between the LINK+ terminal and the PACK- terminal to determine whether the pre-charge relay Relay_pp1 is correctly closed, providing a reference for the pre-charge control logic; at the same time, determine whether the main positive relay Relay_mp1 is correctly closed / opened.

[0060] (4) Detect the voltage between LINK+ and LINK- to provide a reference for calculating the SOC of the energy storage battery; at the same time, when the system's total positive relay Relay_mp1 and total negative relay Relay_mn1 are disconnected, detect the capacitor C d1 and C d2 Is the discharge completed?

[0061] In the embodiment of the present application, the voltage division switching circuit further includes:

[0062] By controlling the parameters of the first control terminal, the second control terminal, the third control terminal and the fourth control terminal, a voltage value between any two terminals among the first terminal, the second terminal, the third terminal and the fourth terminal is obtained.

[0063] In the embodiment of the present application, the first terminal is a PACK+ terminal, the second terminal is a PACK-terminal, the third terminal is a LINK+ terminal, and the fourth terminal is a PACK-terminal.

[0064] In an optional embodiment, the differential amplifier circuit may include a high-precision operational amplifier with low noise and high input impedance characteristics to ensure accurate amplification of the signal. In addition, the differential amplifier circuit may also include a capacitor for filtering to reduce the impact of high-frequency noise on the signal. By carefully selecting the parameters of the operational amplifier and the filter capacitor, the frequency response of the circuit can be optimized, thereby improving the detection accuracy and the overall performance of the system.

[0065] In an embodiment of the present application, the differential amplifier circuit includes an operational amplifier, a resistor connected in parallel to the operational amplifier, and a voltage regulator diode connected in parallel to the resistor.

[0066] In an optional embodiment, the operational amplifier in the differential amplifier circuit can select an AD628 amplifier, and other operational amplifiers, such as INA128 or INA129, can also be selected. These models also have high precision and low noise characteristics and are suitable for precise voltage detection applications. The selection of the operational amplifier needs to consider factors such as its common mode rejection ratio, power supply rejection ratio, and temperature drift to ensure that stable amplification performance can be provided under different working environments. In addition, the parameters of the resistor and the voltage regulator diode of the differential amplifier circuit also need to be accurately calculated and selected according to the actual circuit design requirements to ensure the stability and reliability of the circuit. Through these carefully designed circuit elements, the performance of the entire voltage detection system can be effectively improved, ensuring that the voltage of the energy storage battery can be accurately detected under various working conditions, and providing protection for the stable operation of the light storage system.

[0067] In the embodiment of the present application, the operational amplifier in the differential amplifier circuit is an AD628 amplifier.

[0068] In an optional embodiment, the isolation amplifier circuit can be designed with different components, and can be designed with an optical coupler or an isolation sensor. For example, the ACPL-C87BT DC voltage isolation sensor can also use the HCNR201 linear optical coupler, or use other types of isolation components, such as the ISO7240 series digital isolator. The design of the isolation amplifier circuit needs to ensure the integrity and safety of the signal when it is transmitted between the high-voltage and low-voltage parts, while reducing the impact of electromagnetic interference on the signal.

[0069] In an embodiment of the present application, the isolation amplifier circuit includes an isolation amplifier and a resistor connected between the differential amplifier circuit and the isolation amplifier circuit.

[0070] In the embodiment of the present application, the isolation amplifier circuit selects the ACPL-C87BT model DC voltage isolation sensor.

[0071] In the embodiment of the present application, the control terminals of the photo-controlled relay are respectively a first control terminal, a second control terminal, a third control terminal and a fourth control terminal. Figure 1 As shown, the invented photovoltaic energy storage system energy storage battery voltage detection circuit includes a voltage division switching circuit, a differential amplifier circuit, an isolation amplifier circuit and a differential to single-ended circuit, and the characteristics and functions of each part are as follows.

[0072] In the embodiment of the present application, the voltage-dividing differential circuit: PACK+ and LINK+ terminals are connected in parallel with C1H and C5H respectively to filter the high voltage signal to obtain a stable high voltage signal; then, low voltage drop diodes D1H and D2H are connected in series respectively to ensure that the detected high voltages are all positive; secondly, R2H-R5H and R7H-R10H are connected in series respectively and connected to the two channels of the photo-controlled relay U2HA respectively; thirdly, the 7th and 5th pins of the photo-controlled relay U2HA are connected to R13H together; the other end of R13H is connected to the 7th and 5th pins of the photo-controlled relay U5HA; the 6th and 8th pins of the photo-controlled relay U5HA are connected to PACK- and LINK- respectively through 0 ohm resistors R17H and R18H; at the same time, the control terminals of the photo-controlled relays U2HA and U5HA are C_PACK+, C_LINK+, C_PACK-, and C_LINK- respectively.

[0073] In an optional embodiment, the above connection is adopted to achieve measurement of different voltages by controlling C_PACK+ (i.e., the first control terminal), C_LINK+ (i.e., the third control terminal), C_PACK- (i.e., the second control terminal), and C_LINK- (i.e., the fourth control terminal);

[0074] It should be noted that for ease of understanding, the subsequent first control terminal, second control terminal, third control terminal, fourth control terminal, first terminal, second terminal, third terminal and fourth terminal are all expressed using fixed C_PACK+, C_PACK-, C_LINK+, C_LINK-, PACK+ terminal, PACK-terminal, LINK+ terminal and PACK-terminal.

[0075] In the embodiment of the present application, the specific measurement steps are as follows:

[0076] First, detect the voltage between the PACK+ terminal and the PACK- terminal: set C_PACK+ and C_PACK- to high level; set C_LINK+ and C_LINK- to low. At this time, 8-7 of U2HA is turned on, 6-5 of U5HA is turned on, and the differential mode voltage across the resistor R13H is:

[0077]

[0078] Furthermore, the voltage between the PACK+ terminal and the LINK- terminal is detected: C_PACK+ and C_LINK- are set to high level; C_LINK+ and C_PACK- are set to low level. At this time, 8-7 of U2HA is turned on, 8-7 of U5HA is turned on, and the differential mode voltage across the resistor R13H is:

[0079]

[0080] Furthermore, the voltage between the LINK+ terminal and the PACK- terminal is detected: C_PACK- and C_LINK+ are set to high level; C_LINK- and C_PACK+ are set to low level. At this time, 6-5 of U2HA is turned on, 6-5 of U5HA is turned on, and the differential mode voltage across the resistor R13H is:

[0081]

[0082] Furthermore, the voltage between the LINK+ terminal and the LINK- terminal is detected: C_LINK- and C_LINK+ are set to high level; C_PACK- and C_PACK+ are set to low level. At this time, 6-5 of U2HA is turned on, 8-7 of U5HA is turned on, and the differential mode voltage across the resistor R13H is:

[0083]

[0084] The above four situations are shown in Table 1.

[0085] Table 1 Control terminals and measurement voltage

[0086]

[0087] In an optional embodiment, the differential amplifier circuit, such as Figure 1 As shown, a voltage zener diode is connected in parallel across R13H to prevent the differential mode voltage across R13H from being too high and causing damage to U3H. The output voltage of U3H is,

[0088]

[0089] U3H can withstand high common mode voltage of ±120V, avoiding the influence of high common mode voltage on measurement accuracy.

[0090] In an optional embodiment, the isolation amplifier circuit, the 5-pin output of U3H is connected to the 2-pin of U1H through R12H, and the differential signal at its 6- and 7-pins is isolated and output. Since the gain of U1H is 1, the differential voltage at the 6- and 7-pins of U1H is obtained as follows:

[0091] V U3H6-7 =V U3H =0.1*V R13HD

[0092] In an optional embodiment, a differential to single-ended circuit is used to convert the differential voltage at pins 6 and 7 of U1H into a single-ended signal according to Figure 1 The connection shown in the figure shows that the voltage at the M_HVA terminal is,

[0093]

[0094] In summary, after being processed by the above-mentioned photovoltaic energy storage system energy storage battery voltage detection circuit, four voltage measurements can be achieved.

[0095] In the embodiment of the present application, a first power-on startup logic is preset, and the first power-on startup logic is used to determine whether the energy storage battery of the photovoltaic storage system is powered on normally.

[0096] In an optional embodiment, the first power-on startup logic can be logically designed according to different demand sequences. For example, in the above four voltage detection steps, if it is necessary to prioritize the voltage between the first terminal and the second terminal, the voltage detection between the first terminal and the second terminal is set in the first step of the first power-on startup logic, thereby ensuring that the voltage is detected first when the system starts. If the detection result shows that the voltage is normal, the system continues the startup process; if the voltage is abnormal, the system will execute corresponding protection measures, such as sounding an alarm or cutting off the power supply, to prevent equipment damage or safety accidents.

[0097] In an optional embodiment, the first power-on startup logic also includes monitoring the battery temperature to ensure that the battery operates within a safe temperature range to avoid performance degradation or damage due to overheating.

[0098] In an optional embodiment, several different judgment steps of the first power-on startup logic may be designed according to actual needs, which is not limited here.

[0099] In the embodiment of the present application, the first power-on startup logic includes: four judgment logics;

[0100] Set the judgment logic order according to requirements;

[0101] The judgment logic includes maintenance switch fault judgment, total negative relay fault judgment, pre-charge relay fault judgment and total positive relay fault judgment.

[0102] In an optional embodiment, the first power-on startup logic is set as follows Figure 3 As shown, power-on start signal 201: the system receives a power-on start signal. Detect the voltage between PACK+ and PACK- 202: Detect the voltage between PACK+ and PACK-. If the voltage is not p+p- ∈[min p+p- ,max p+p- ] range 203, then enter the maintenance switch fault processing 204. Otherwise, continue to the next step. Close the total negative relay 205: Close the total negative relay. Detect the voltage between PACK+ and LINK- 206: Detect the voltage between PACK+ and LINK-. If the voltage is not within V p+l- ∈[min p+l- ,max p+l-] range 207, then enter the total negative relay fault processing 208. Otherwise, continue to the next step. Close the pre-charge relay and wait for 500ms 210: Close the pre-charge relay and wait for 500ms. Detect the voltage between LINK+ and PACK- 211: Detect the voltage between LINK+ and PACK-. If the voltage is not within V l+p- ∈[min l+p- ,max l+p- ] range 212, then enter the pre-charge relay fault processing 213. Otherwise, continue to the next step. Disconnect the total negative relay 209: Disconnect the total negative relay. Close the total positive relay, disconnect the pre-charge relay, and wait for 500ms 214: Close the total positive relay, disconnect the pre-charge relay, and wait for 500ms. Detect the voltage between LINK+ and LINK- 216: Detect the voltage between LINK+ and LINK-. If the voltage is not within V l+l- ∈[min l+l- ,maxl +l- ] range 217, then enter the total positive relay fault processing 218, disconnect the total negative relay and the total positive relay 209, and enter the fault processing flow 221: enter the fault processing flow. Otherwise, continue to the next step. High voltage power-on completion 220: High voltage power-on completion.

[0103] In summary, the present invention proposes a novel photovoltaic storage system energy storage battery voltage detection circuit and control method, which can effectively reduce hardware costs, simplify circuit design, and improve the accuracy and reliability of signal processing. By adopting a voltage-dividing switching circuit, the use of high-voltage voltage-dividing resistors is reduced, thereby reducing hardware costs and isolation costs. At the same time, through the design of differential amplifier circuits and isolation amplifier circuits, the stability and anti-interference ability of signal processing are improved. In addition, the voltage detection circuit and control method of the present invention can also realize fast and accurate power-on startup logic judgment, ensuring that the photovoltaic storage system can operate reliably under various circumstances. In summary, the present invention not only improves the performance of the photovoltaic storage system, but also provides users with a more economical and efficient power solution.

[0104] This embodiment also provides a novel control method for a photovoltaic energy storage system energy storage battery voltage detection circuit, including:

[0105] Establish a target detection circuit and power on the target detection circuit;

[0106] A first power-on control logic is preset, and the first power-on control logic judgment is performed according to the actual value generated after the target detection circuit is powered on. The first power-on control logic includes four judgment logics, and the judgment logic includes a maintenance switch fault judgment, a total negative relay fault judgment, a pre-charge relay fault judgment, and a total positive relay fault judgment;

[0107] The control of the target detection circuit is completed according to the first power-on control logic judgment result.

[0108] The above-mentioned unit modules may be embedded in or independent of a processor in a computer device in the form of hardware, or may be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to the above-mentioned modules.

[0109] This embodiment also provides a computer device, which may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 4 As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a control method for a new type of energy storage battery voltage detection circuit of a light storage system is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse.

[0110] This embodiment further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0111] Establish a target detection circuit and power on the target detection circuit;

[0112] A first power-on control logic is preset, and the first power-on control logic judgment is performed according to the actual value generated after the target detection circuit is powered on. The first power-on control logic includes four judgment logics, and the judgment logic includes a maintenance switch fault judgment, a total negative relay fault judgment, a pre-charge relay fault judgment, and a total positive relay fault judgment;

[0113] The control of the target detection circuit is completed according to the first power-on control logic judgment result.

[0114] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

[0115] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The scheme in the embodiments of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0116] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0117] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0118] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1The steps for the functions specified in one or more boxes.

[0119] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0120] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A novel photovoltaic energy storage system energy storage battery voltage detection circuit, characterized in that: include: Voltage division switching circuit, differential amplifier circuit, isolation amplifier circuit and differential to single-ended circuit; The voltage division switching circuit includes a plurality of resistors, a plurality of capacitors, a plurality of diodes and a plurality of photo-controlled relays; The voltage division switching circuit further includes a first control terminal, a second control terminal, a third control terminal and a fourth control terminal corresponding to the first terminal, the second terminal, the third terminal and the fourth terminal.

2. The novel photovoltaic energy storage system energy storage battery voltage detection circuit as claimed in claim 1, characterized in that: The voltage division switching circuit further includes: By controlling the parameters of the first control terminal, the second control terminal, the third control terminal and the fourth control terminal, a voltage value between any two terminals among the first terminal, the second terminal, the third terminal and the fourth terminal is obtained.

3. The novel photovoltaic energy storage system energy storage battery voltage detection circuit as claimed in claim 2, characterized in that: Also includes: A first power-on startup logic is preset, and the first power-on startup logic is used to determine whether the energy storage battery of the photovoltaic storage system is powered on normally.

4. The novel photovoltaic energy storage system energy storage battery voltage detection circuit as claimed in claim 3, characterized in that: The first power-on startup logic includes: four judgment logics; Set the judgment logic order according to requirements; The judgment logic includes maintenance switch fault judgment, total negative relay fault judgment, pre-charge relay fault judgment and total positive relay fault judgment.

5. The novel photovoltaic energy storage system energy storage battery voltage detection circuit as claimed in claim 4, characterized in that: The differential amplifier circuit includes an operational amplifier, a resistor connected in parallel to the operational amplifier, and a voltage-stabilizing diode connected in parallel to the resistor.

6. The novel photovoltaic energy storage system energy storage battery voltage detection circuit as claimed in claim 5, characterized in that: The isolation amplifier circuit includes an isolation amplifier and a resistor connected between the differential amplifier circuit and the isolation amplifier circuit.

7. The novel photovoltaic energy storage system energy storage battery voltage detection circuit as claimed in claim 6, characterized in that: The control ends of the photo-controlled relay are respectively a first control terminal, a second control terminal, a third control terminal and a fourth control terminal.

8. A novel control method for a voltage detection circuit of a photovoltaic energy storage system energy storage battery, characterized in that: include: Establishing a target detection circuit and powering on the target detection circuit; A first power-on control logic is preset, and a first power-on control logic judgment is performed according to an actual value generated after the target detection circuit is powered on. The first power-on control logic includes four judgment logics, and the judgment logic includes a maintenance switch fault judgment, a total negative relay fault judgment, a pre-charge relay fault judgment, and a total positive relay fault judgment; The target detection circuit is controlled according to the first power-on control logic judgment result.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to claim 8 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to claim 8 are implemented.

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