A new energy storage control system

Abstract

The present invention relates to the field of energy storage, and provides a new energy storage control system, comprising a main control module, a front rectifier filter module and a voltage regulating output module, wherein the voltage regulating output module comprises a half-bridge drive circuit, a first transformer, a rectifier output circuit and a synchronous rectifier drive circuit, wherein the input end of the half-bridge drive circuit is connected to the front rectifier filter module, the controlled end is connected to the main control module, and the output end is connected to the primary side of the first transformer, wherein the rectifier output circuit comprises a first MOS tube group and a second MOS tube group, wherein the first end of the secondary side of the first transformer is connected to the positive pole of the energy storage output end via the first MOS tube group, and the second end is connected to the negative pole of the energy storage output end via the second MOS tube group, and the synchronous rectifier drive circuit is respectively connected to the controlled ends of the first MOS tube group and the second MOS tube group; the present invention can meet the use of high-power energy storage, and has stronger safety and stability in use.

Description

Technical Field

[0001] The present invention relates to the field of energy storage, and in particular to a new energy storage control system. Background Art

[0002] With the development of science and technology, energy storage systems are being used more and more widely in the field of new energy. Energy storage control systems are used to control the control process of energy storage devices. Energy storage control systems generally include a front-stage rectifier part and a rear-stage voltage regulator part. The rectifier part is used to perform preliminary rectification and filtering on the external input AC power supply, and the voltage regulator part is used to adjust the output voltage of the energy storage device. The voltage regulator part usually uses an LLC circuit for voltage regulation. The voltage regulator part generally includes a transformer, a bridge drive circuit located on the primary side of the transformer, and a rectifier output circuit located on the secondary side of the transformer. The rectification on the secondary side of the transformer mostly uses a diode, but in a larger power energy storage circuit, the diode has a weak load-carrying capacity and cannot meet the output requirements of the rear stage of the transformer. Summary of the invention

[0003] The problem solved by the present invention is how to provide a new energy storage control system that can meet the needs of high-power energy storage.

[0004] In order to solve the above problems, the present invention provides a new energy storage control system, comprising: a main control module, a pre-rectification and filtering module and a voltage regulation output module, wherein the voltage regulation output module comprises a half-bridge drive circuit, a first transformer, a rectifier output circuit and a synchronous rectifier drive circuit, wherein the input end of the pre-rectifier and filtering module is connected to an external power supply, the input end of the half-bridge drive circuit is connected to the output end of the pre-rectifier and filtering module, the controlled end is connected to the main control module, and the output end is connected to the primary side of the first transformer, the rectifier output circuit comprises a first MOS tube group and a second MOS tube group, wherein the first MOS tube group and the second MOS tube group respectively comprise a plurality of parallel rectifier MOS tubes, the first end of the secondary side of the first transformer is connected to the positive pole of the energy storage output port via the first MOS tube group, and the second end is connected to the negative pole of the energy storage output port via the second MOS tube group, the input end of the synchronous rectifier drive circuit is connected to the main control module, and the output end is respectively connected to the controlled ends of the first MOS tube group and the second MOS tube group, so as to control and protect the on and off of the rectifier MOS tube.

[0005] Furthermore, the rectification output circuit also includes a synchronous rectification absorption circuit, and the synchronous rectification absorption circuit is arranged between two ends of the secondary side of the first transformer to improve the EMC performance of the system.

[0006] Furthermore, the rectifier output circuit also includes an upper tube CD absorption circuit and a lower tube CD absorption circuit, which are respectively connected in parallel at both ends of the first MOS tube group and the second MOS tube group, and are used for peak current when the rectifier MOS tube is switched.

[0007] Furthermore, the rectifier output circuit also includes a first dummy load circuit and a second dummy load circuit, the first dummy load circuit is arranged between the first MOS tube group and the positive electrode of the energy storage output end, and the second dummy load circuit is arranged between the second MOS tube group and the negative electrode of the energy storage output end, for stabilizing the no-load voltage and preventing sudden changes in the output voltage.

[0008] Furthermore, the synchronous rectification driving circuit includes an isolation transformer, a driving signal absorption circuit, a first rectifying diode, a G-pole peak circuit, a driving output circuit and a negative voltage absorption circuit;

[0009] The two ends of the primary side of the isolation transformer are respectively connected to the main control module, and the first end of the secondary side of the isolation transformer is respectively connected to the G poles of the plurality of the rectifier MOS tubes in the rectifier output circuit via the first rectifier diode, the G pole peak circuit and the drive output circuit in sequence, so as to drive the rectifier MOS tube according to the control of the main control module, wherein the G pole peak circuit is used to absorb the peak voltage of the G pole when the rectifier MOS tube is switched;

[0010] The second end of the secondary side of the isolation transformer is respectively connected to the S poles of the plurality of the rectifying MOS tubes in the rectifying output circuit via the negative voltage absorption circuit, so as to generate negative voltage for protection when the rectifying MOS tubes are turned off;

[0011] The driving signal absorption circuit is connected in parallel to both ends of the secondary side of the isolation transformer, and is used to absorb interference noise in the driving signal.

[0012] Furthermore, the half-bridge driving circuit includes a MOS tube half-bridge, a first inductor and a first capacitor, the controlled end of the MOS tube half-bridge is connected to the main control module, the upper and lower bridge arms are respectively connected to the positive and negative output ends of the pre-rectifier and filter module, the first end of the first inductor is connected to the midpoint of the MOS tube half-bridge, and the second end of the first inductor is sequentially connected to the primary side coil of the first transformer and the first capacitor to form an LLC circuit.

[0013] Furthermore, the half-bridge drive circuit also includes a half-bridge zero current detection transformer, the output end of which is connected to the main control module, and is used to detect the current zero-crossing information of the loop and transmit it to the main control module when the upper and lower bridge arm switches of the MOS tube half-bridge are switched.

[0014] Furthermore, it also includes an output voltage feedback circuit, the input end of the output voltage feedback circuit is connected to the energy storage output port, and the output end is connected to the main control module, which is used to transmit the detected energy storage output voltage information to the main control module.

[0015] Furthermore, the output voltage feedback circuit includes a first differential circuit, a first amplifier circuit, a first optocoupler, a first follower circuit, a low-pass filter circuit and a first TVS diode, the input end of the first differential circuit is connected to the energy storage output port, the output end is connected to the first amplifier circuit, the output end of the first amplifier circuit is connected to the input end of the first optocoupler, the output end of the first optocoupler is connected to the input end of the first follower circuit, and the output end of the first follower circuit is connected to the main control module via the low-pass filter circuit and the first TVS diode.

[0016] Furthermore, the first differential circuit includes a first voltage-dividing resistor group and a first differential amplifier, the positive input terminal of the first differential amplifier is connected to the positive electrode of the energy storage output port via the first voltage-dividing resistor group, the negative input terminal is connected to the negative electrode of the energy storage output port, and the output terminal is connected to the input terminal of the first amplifier circuit.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The input AC power first passes through the pre-rectifier and filter module for primary rectification and filtering, and is converted into a DC input voltage. The DC input voltage is input to the input end of the half-bridge drive circuit in the voltage regulation output module. The half-bridge drive circuit controls the switching state of the internal drive MOS tube according to the control signal of the main control module, so as to change the on-off state and frequency of the primary side coil of the first transformer and the DC input voltage, thereby making the loop of the primary side coil of the first transformer in a cycle state of energy storage and discharge, and then generating a corresponding AC power on the secondary side of the first transformer. The main control module changes the control signal and changes the switching frequency and period of the internal drive MOS tube of the half-bridge drive circuit, so as to change the voltage generated on the secondary side of the first transformer and achieve a regulated output. The AC power generated on the secondary side of the first transformer needs to be rectified and converted into a DC energy storage power supply. Compared with traditional diode rectification, the use of high-power MOS tubes can reduce energy consumption and have stronger load capacity. In the rectification output circuit, the first MOS tube group and the second MOS tube group respectively include multiple parallel rectifier MOS tubes, which further improves the load capacity. The main control module can obtain the conversion cycle of the AC power generated by the secondary side of the first transformer according to the driving frequency of the primary side half-bridge driving circuit, and then in the positive and negative half cycles of the AC power, the first MOS tube group or the second MOS tube group is switched on through the synchronous rectification driving circuit to achieve high-power rectification. At the same time, the synchronous rectification driving circuit can isolate the control signal of the main control module, and according to the control signal of the main control module, a synchronous drive is issued to the multiple rectifier MOS tubes in the first MOS tube group or the second MOS tube, so as to ensure the stability of the rectification control and realize the protection of the rectifier MOS tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall principle structure of an embodiment of the present invention;

[0020] Figure 2 Schematic diagram of the principle structure of a half-bridge driving circuit according to an embodiment of the present invention;

[0021] Figure 3 Schematic diagram of the principle structure of the rectifier output circuit according to an embodiment of the present invention;

[0022] Figure 4 Schematic diagram of the principle structure of a synchronous rectification driving circuit according to an embodiment of the present invention;

[0023] Figure 5 It is a schematic diagram of the principle structure of the first part of the output voltage feedback circuit according to an embodiment of the present invention;

[0024] Figure 6 It is a schematic diagram of the principle structure of the second part of the output voltage feedback circuit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment" and "one implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or implementation are included in at least one embodiment or implementation of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.

[0028] like Figure 1 As shown, the present invention provides a new energy storage control system, comprising: a main control module, a pre-rectifier filter module and a voltage regulation output module, the voltage regulation output module comprises a half-bridge drive circuit, a first transformer, a rectifier output circuit and a synchronous rectifier drive circuit, the input end of the pre-rectifier filter module is connected to an external power supply, the input end of the half-bridge drive circuit is connected to the output end of the pre-rectifier filter module, the controlled end is connected to the main control module, and the output end is connected to the primary side of the first transformer, the rectifier output circuit comprises a first MOS tube group and a second MOS tube group, the first MOS tube group and the second MOS tube group respectively comprise a plurality of parallel rectifier MOS tubes, the first end of the secondary side of the first transformer is connected to the positive pole of the energy storage output port via the first MOS tube group, and the second end is connected to the negative pole of the energy storage output port via the second MOS tube group, the input end of the synchronous rectifier drive circuit is connected to the main control module, and the output end is respectively connected to the controlled ends of the first MOS tube group and the second MOS tube group, for controlling and protecting the on and off of the rectifier MOS tube.

[0029] It should be noted that if Figure 1 , 2As shown in 3, when the AC power input generated by the new energy generation needs to be stored, the input AC power first passes through the pre-rectifier filter module for primary rectification and filtering, and is converted into a DC input voltage. The DC input voltage is input to the input end of the half-bridge drive circuit in the voltage regulation output module. The half-bridge drive circuit controls the switching state of the internal drive MOS tube according to the control signal of the main control module, and can change the on-off state and frequency of the primary side coil of the first transformer and the DC input voltage, so that the loop of the primary side coil of the first transformer is in a cycle state of energy storage and discharge, and then the corresponding AC power is generated on the secondary side of the first transformer. The main control module changes the control signal and changes the switching frequency and period of the internal drive MOS tube of the half-bridge drive circuit, so as to change the voltage generated on the secondary side of the first transformer and realize the voltage regulated output. The AC power generated on the secondary side of the first transformer needs to be Rectification, converted into a DC energy storage power supply, compared with traditional diode rectification, the use of high-power MOS tubes can reduce energy consumption and have a stronger load capacity. In the rectification output circuit, the first MOS tube group and the second MOS tube group respectively include multiple parallel rectifier MOS tubes, which further improves the load capacity. The main control module can obtain the conversion cycle of the AC power generated by the secondary side of the first transformer according to the driving frequency of the primary side half-bridge drive circuit, and then in the positive and negative half cycles of the AC power, the first MOS tube group or the second MOS tube group is switched on through the synchronous rectification drive circuit to achieve high-power rectification. At the same time, the synchronous rectification drive circuit can isolate the control signal of the main control module, and according to the control signal of the main control module, a synchronous drive is issued to the multiple rectifier MOS tubes in the first MOS tube group or the second MOS tube, so as to ensure the stability of the rectification control and realize the protection of the rectifier MOS tube.

[0030] In one embodiment of the present invention, the rectification output circuit further includes a synchronous rectification absorption circuit, and the synchronous rectification absorption circuit is arranged between two ends of the secondary side of the first transformer to improve the EMC performance of the system.

[0031] It should be noted that electromagnetic compatibility (EMC) refers to the ability of a device or system to operate in accordance with requirements in its electromagnetic environment and not cause intolerable electromagnetic interference to any device in its environment, such as Figure 3 As shown, in the synchronous rectification absorption circuit, resistors R107, R108, R109 and capacitor C75 form an upper tube synchronous rectification absorption circuit, and resistors 113, R115, R114 and capacitor C75 form a lower tube synchronous rectification absorption circuit. The upper tube synchronous rectification absorption circuit and the lower tube synchronous rectification absorption circuit are connected in series and arranged between the two ends of the secondary side of the first transformer. When the AC power is generated on the secondary side of the first transformer, the common mode interference signal can be effectively absorbed, and the electromagnetic interference to the external electrical appliances can be effectively avoided.

[0032] In one embodiment of the present invention, the rectifier output circuit further includes an upper tube CD absorption circuit and a lower tube CD absorption circuit, wherein the upper tube CD absorption circuit and the lower tube CD absorption circuit are respectively connected in parallel at both ends of the first MOS tube group and the second MOS tube group, and are used for peak current when the rectifier MOS tube is switched.

[0033] It should be noted that if Figure 3 As shown, capacitor C79 and diode D14 form an upper tube CD absorption circuit, capacitor C78 and diode D11 form a lower tube CD absorption circuit, and the upper tube CD absorption circuit and the lower tube CD absorption circuit can protect the rectifier MOS tubes in the first MOS tube group and the second MOS tube group respectively.

[0034] In one embodiment of the present invention, the rectifier output circuit also includes a first dummy load circuit and a second dummy load circuit, the first dummy load circuit is arranged between the first MOS tube group and the positive electrode of the energy storage output end, and the second dummy load circuit is arranged between the second MOS tube group and the negative electrode of the energy storage output end, for stabilizing the no-load voltage and preventing sudden changes in the output voltage.

[0035] It should be noted that if Figure 3 As shown, the first dummy load circuit includes resistors R131, R132, and R133 connected in parallel, and the second dummy load circuit includes resistors R134, R135, and R136 connected in parallel. The first dummy load circuit and the second dummy load circuit can stabilize the no-load voltage and prevent sudden changes in the output voltage.

[0036] In one embodiment of the present invention, the synchronous rectification driving circuit includes an isolation transformer, a driving signal absorption circuit, a first rectification diode, a G-pole peak circuit, a driving output circuit and a negative voltage absorption circuit;

[0037] The two ends of the primary side of the isolation transformer are respectively connected to the main control module, and the first end of the secondary side of the isolation transformer is respectively connected to the G poles of the plurality of the rectifier MOS tubes in the rectifier output circuit via the first rectifier diode, the G pole peak circuit and the drive output circuit in sequence, so as to drive the rectifier MOS tube according to the control of the main control module, wherein the G pole peak circuit is used to absorb the peak voltage of the G pole when the rectifier MOS tube is switched;

[0038] The second end of the secondary side of the isolation transformer is respectively connected to the S poles of the plurality of the rectifying MOS tubes in the rectifying output circuit via the negative voltage absorption circuit, so as to generate negative voltage for protection when the rectifying MOS tubes are turned off;

[0039] The driving signal absorption circuit is connected in parallel to both ends of the secondary side of the isolation transformer, and is used to absorb interference noise in the driving signal.

[0040] It should be noted that if Figure 4 As shown in the figure, a synchronous rectification driving circuit of an upper tube is provided, which is used to synchronously drive a plurality of parallel rectifier MOS tubes in a first MOS tube group. The isolation transformer T3 isolates the driving signal sent by the main control module to improve the anti-interference property of the signal. The driving signal absorption circuit includes a diode D1, a capacitor C21, and a resistor R211. The anode of the diode D1 is connected to the second end of the secondary side of the isolation transformer T3, and the cathode of the diode D1 is connected to the first end of the secondary side of the isolation transformer T3 via the capacitor C21 and the resistor R211, so that when an isolated driving signal is generated on the secondary side of the isolation transformer T3, interference clutter in the driving signal is absorbed to ensure the stability of the synchronous driving of the plurality of rectifier MOS tubes. The first rectifier diode D33 is used for driving the signal. Rectification, the first rectifier diode D33 is connected to the G-pole peak circuit through the damping resistor R212. The G-pole peak circuit includes a resistor R214 and transistors Q24 and Q25. When the voltage peaks, the switches of the transistors Q24 and Q25 can be driven to absorb the G-pole peak voltage. In the drive output circuit, resistors R215, R216 and a diode D5 form a drive resistor group. The input end of the drive resistor group is connected to the damping resistor R212 and the G-pole peak circuit. The output end outputs 4 synchronous signals to the G-pole of the rectifier MOS tube in the first MOS tube group through resistors R217, R218, R219 and R220 respectively. The negative voltage absorption circuit includes a parallel-connected voltage regulator diode D9 and a capacitor C120, which are used to generate negative voltage for protection when the rectifier MOS tube is turned off.

[0041] In one embodiment of the present invention, the half-bridge driving circuit includes a MOS tube half-bridge, a first inductor and a first capacitor, the controlled end of the MOS tube half-bridge is connected to the main control module, the upper and lower bridge arms are respectively connected to the positive and negative output ends of the pre-rectifier and filter module, the first end of the first inductor is connected to the middle point of the MOS tube half-bridge, and the second end of the first inductor is sequentially connected to the primary side coil of the first transformer and the first capacitor to form an LLC circuit.

[0042] It should be noted that if Figure 2As shown, the MOS transistor half bridge includes a MOS transistor Q11 and a MOS transistor Q6. The MOS transistor Q11, a resistor R87, and a capacitor C28 form an upper bridge arm. The MOS transistor Q16, a resistor R88, and a capacitor C31 form a lower bridge arm. The first inductor L4 is connected to the primary side coil of the first transformer T4 and the first capacitor C33 in sequence to form an LLC circuit. The MOS transistor Q11 and the MOS transistor Q6 are controlled by a PWM signal sent by a main control module. When the MOS transistor Q6 is turned on and the MOS transistor Q11 is turned off, the DC power output by the front rectifier and filter module charges the LLC circuit. When the MOS transistor Q11 is turned on and the MOS transistor Q6 is turned off, the LLC circuit discharges in reverse and circulates in sequence to convert the DC power into an AC power, thereby forming a corresponding AC voltage output on the secondary side of the first transformer T4. By changing the signal duty ratio of the main control module to the MOS transistor Q11 and the MOS transistor Q6, the AC voltage output by the secondary side of the subsequent first transformer T4 can be changed.

[0043] In one embodiment of the present invention, the half-bridge drive circuit also includes a half-bridge zero current detection transformer, the output end of which is connected to the main control module, and is used to detect the current zero-crossing information of the loop and transmit it to the main control module when the upper and lower bridge arm switches of the MOS tube half-bridge are switched.

[0044] It should be noted that if Figure 2 As shown, the half-bridge zero current detection transformer CT1 is arranged at the LLC circuit, and is used to detect the current state when the LLC circuit is charged and discharged, detect the current zero-crossing information, and determine the zero point position of the AC power supply, so that the main control module can more accurately confirm the frequency and zero-crossing point of the AC power, and thus better control the first MOS tube group or the second MOS tube of the subsequent stage, and switch the first MOS tube group or the second MOS tube group to conduct through the synchronous rectification drive circuit, so that the first MOS tube group or the second MOS tube accurately works in the positive and negative half cycles of the AC power supply, avoiding the error in the synchronization of the rectification switching of the MOS tube group and the waveform of the AC voltage on the secondary side of the first transformer, so that the rectified DC output is smoother and more accurate.

[0045] In one embodiment of the present invention, an output voltage feedback circuit is further included, wherein the input end of the output voltage feedback circuit is connected to the energy storage output port, and the output end is connected to the main control module, and is used to transmit the detected energy storage output voltage information to the main control module.

[0046] It should be noted that by collecting the voltage information of the energy storage output port and feeding it back to the main control module, a closed-loop control can be effectively formed to stabilize the energy storage voltage of the energy storage device. For example, when the feedback voltage is too low, the main control module changes the signal duty cycle of the MOS tube Q11 and the MOS tube Q6, and changes the charge and discharge time of the LLC circuit, so as to change the AC voltage outputted by the secondary side of the first transformer T4 at the rear stage, thereby increasing the energy storage voltage at the energy storage output port after rectification to reach the required voltage, thereby realizing voltage-stabilized charging.

[0047] In one embodiment of the present invention, the output voltage feedback circuit includes a first differential circuit, a first amplifier circuit, a first optocoupler, a first follower circuit, a low-pass filter circuit and a first TVS diode, the input end of the first differential circuit is connected to the energy storage output port, the output end is connected to the first amplifier circuit, the output end of the first amplifier circuit is connected to the input end of the first optocoupler, the output end of the first optocoupler is connected to the input end of the first follower circuit, and the output end of the first follower circuit is connected to the main control module via the low-pass filter circuit and the first TVS diode.

[0048] It should be noted that if Figure 5 As shown, the output voltage of the energy storage output port is filtered by the C72 capacitor and output to the two input terminals of the first differential circuit. After differential calculation, the voltage feedback signal is input to the first amplifier circuit. The first amplifier circuit includes two-stage amplification. The voltage feedback signal first passes through the integral amplifier circuit composed of resistors R115, R117, R118 and operational amplifier U16B, and then the output voltage feedback information is transmitted to the base of the transistor Q32 through the R132 resistor for secondary amplification so that the signal can be better received by the main control module. The amplified voltage feedback signal is transmitted to the first optical coupler U1 through the collector of the transistor Q32. 5. Photoelectric isolation is performed to improve the anti-interference ability of the signal, and then it is transmitted to the first follower circuit. The first follower circuit includes capacitor C64, resistor R117 and operational amplifier U17A. By following the output of the voltage feedback signal, the anti-interference ability of the signal is further improved. In the low-pass filter circuit, the two-stage RC low-pass filter circuit of resistor R105, capacitor C101 and resistor R135, capacitor C75 can effectively filter out the clutter in the voltage feedback signal. After that, the voltage feedback signal is limited and shifted, corrected and output to the main control module through the first TVS diode D12, so that the main control module can adjust the output voltage.

[0049] In one embodiment of the present invention, the first differential circuit includes a first voltage-dividing resistor group and a first differential amplifier, the positive input terminal of the first differential amplifier is connected to the positive electrode of the energy storage output port via the first voltage-dividing resistor group, the negative input terminal is connected to the negative electrode of the energy storage output port, and the output terminal is connected to the input terminal of the first amplifying circuit.

[0050] It should be noted that the first voltage-dividing resistor group includes resistors R124, R128 and R134. Resistors R124, R128 and R134 divide the input voltage and pass it to the negative input terminal of the first differential amplifier U16. The positive input terminal of the first differential amplifier U16 is grounded, and then a voltage feedback signal is formed at the output terminal of the first differential amplifier U16. Through the differential operational amplifier, the accuracy of voltage detection is improved.

[0051] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A new energy storage control system, characterized in that: include: A main control module, a pre-rectification and filtering module and a voltage regulation output module, wherein the voltage regulation output module comprises a half-bridge drive circuit, a first transformer, a rectifier output circuit and a synchronous rectifier drive circuit, wherein the input end of the pre-rectifier and filtering module is connected to an external power supply, the input end of the half-bridge drive circuit is connected to the output end of the pre-rectifier and filtering module, the controlled end is connected to the main control module, and the output end is connected to the primary side of the first transformer, the rectifier output circuit comprises a first MOS tube group and a second MOS tube group, wherein the first MOS tube group and the second MOS tube group respectively comprise a plurality of parallel rectifier MOS tubes, the first end of the secondary side of the first transformer is connected to the positive pole of the energy storage output port via the first MOS tube group, and the second end is connected to the negative pole of the energy storage output port via the second MOS tube group, the input end of the synchronous rectifier drive circuit is connected to the main control module, and the output end is respectively connected to the controlled ends of the first MOS tube group and the second MOS tube group, for controlling and protecting the on and off of the rectifier MOS tube; The synchronous rectification driving circuit includes an isolation transformer, a driving signal absorption circuit, a first rectifying diode, a G-pole peak circuit, a driving output circuit and a negative voltage absorption circuit; The two ends of the primary side of the isolation transformer are respectively connected to the main control module, and the first end of the secondary side of the isolation transformer is respectively connected to the G poles of the plurality of the rectifier MOS tubes in the rectifier output circuit via the first rectifier diode, the G pole peak circuit and the drive output circuit in sequence, so as to drive the rectifier MOS tube according to the control of the main control module, wherein the G pole peak circuit is used to absorb the peak voltage of the G pole when the rectifier MOS tube is switched; The second end of the secondary side of the isolation transformer is respectively connected to the S poles of the plurality of the rectifying MOS tubes in the rectifying output circuit via the negative voltage absorption circuit, so as to generate negative voltage for protection when the rectifying MOS tubes are turned off; The driving signal absorption circuit is connected in parallel to both ends of the secondary side of the isolation transformer, and is used to absorb interference noise in the driving signal.

2. The new energy storage control system according to claim 1, characterized in that: The rectification output circuit further includes a synchronous rectification absorption circuit, which is arranged between two ends of the secondary side of the first transformer and is used to improve the EMC performance of the system.

3. The new energy storage control system according to claim 1, characterized in that: The rectifier output circuit also includes an upper tube CD absorption circuit and a lower tube CD absorption circuit, which are respectively connected in parallel at both ends of the first MOS tube group and the second MOS tube group, and are used for peak current when the rectifier MOS tube is switched.

4. The new energy storage control system according to claim 3 is characterized in that: The rectifier output circuit also includes a first dummy load circuit and a second dummy load circuit. The first dummy load circuit is arranged between the first MOS tube group and the positive electrode of the energy storage output end, and the second dummy load circuit is arranged between the second MOS tube group and the negative electrode of the energy storage output end, and is used to stabilize the no-load voltage and prevent sudden changes in the output voltage.

5. The new energy storage control system according to claim 1, characterized in that: The half-bridge driving circuit includes a MOS tube half-bridge, a first inductor and a first capacitor. The controlled end of the MOS tube half-bridge is connected to the main control module, and the upper and lower bridge arms are respectively connected to the positive and negative output ends of the pre-rectifier and filter module. The first end of the first inductor is connected to the middle point of the MOS tube half-bridge, and the second end of the first inductor is sequentially connected to the primary side coil of the first transformer and the first capacitor to form an LLC circuit.

6. The new energy storage control system according to claim 5, characterized in that: The half-bridge driving circuit also includes a half-bridge zero current detection transformer, the output end of which is connected to the main control module, and is used to detect the current zero-crossing information of the loop and transmit it to the main control module when the upper and lower bridge arm switches of the MOS tube half-bridge are switched.

7. The new energy storage control system according to claim 1, characterized in that: It also includes an output voltage feedback circuit, the input end of the output voltage feedback circuit is connected to the energy storage output port, and the output end is connected to the main control module, which is used to transmit the detected energy storage output voltage information to the main control module.

8. The new energy storage control system according to claim 7, characterized in that: The output voltage feedback circuit includes a first differential circuit, a first amplifier circuit, a first optocoupler, a first follower circuit, a low-pass filter circuit and a first TVS diode. The input end of the first differential circuit is connected to the energy storage output port, and the output end is connected to the first amplifier circuit. The output end of the first amplifier circuit is connected to the input end of the first optocoupler, the output end of the first optocoupler is connected to the input end of the first follower circuit, and the output end of the first follower circuit is connected to the main control module via the low-pass filter circuit and the first TVS diode.

9. The new energy storage control system according to claim 8, characterized in that: The first differential circuit includes a first voltage-dividing resistor group and a first differential amplifier. The positive input terminal of the first differential amplifier is connected to the positive electrode of the energy storage output port via the first voltage-dividing resistor group, the negative input terminal is connected to the negative electrode of the energy storage output port, and the output terminal is connected to the input terminal of the first amplifier circuit.

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