CN210724225U - Energy storage charge and discharge control module - Google Patents
Energy storage charge and discharge control module Download PDFInfo
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- CN210724225U CN210724225U CN201921241597.3U CN201921241597U CN210724225U CN 210724225 U CN210724225 U CN 210724225U CN 201921241597 U CN201921241597 U CN 201921241597U CN 210724225 U CN210724225 U CN 210724225U
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Abstract
The utility model relates to a switch control field discloses an energy storage charge and discharge control module, has solved the energy storage electric capacity conversion efficiency of current permanent magnet switch controller low, charge slow and problem with high costs. The utility model discloses a feedback circuit and control circuit, current-limiting switch circuit and the tank circuit that connects in proper order the electricity, feedback circuit's sampling end with current-limiting switch circuit electricity is connected, feedback circuit's feedback end with the control circuit electricity is connected. The utility model discloses control circuit controls the on-time of current-limiting switch circuit according to current feedback signal and the voltage feedback signal of feedback circuit of current-limiting switch circuit to can play the purpose of current-limiting or steady voltage respectively, adopt current-limiting switch circuit can improve the charge time of tank circuit effectively, and reduced the cost effectively; in addition, the voltage stabilizing circuit can prevent the energy storage circuit from being damaged due to overvoltage charging.
Description
Technical Field
The utility model relates to a switching control field, especially an energy storage charge-discharge control module.
Background
At present, most of energy storage capacitor charging circuits of permanent magnet switch control drive boards in the market use a switching power supply to convert commercial power AC220V into DC220V to charge an energy storage capacitor, and because the switching power supply has conversion efficiency loss, if high power is output, a high-frequency transformer needs to be made into a larger size, so that cost and space are wasted, and overvoltage charging of the energy storage capacitor of DC250V is easily caused when the voltage is too high, so that the capacitor is exploded.
Disclosure of Invention
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide an energy storage charge-discharge control module, solve the energy storage electric capacity conversion efficiency of current permanent magnet switch controller low, charge slow and with high costs problem.
According to the utility model discloses an aspect provides an energy storage charge-discharge control module, including feedback circuit, and control circuit, current-limiting switch circuit and the energy storage circuit that connects gradually the electricity, feedback circuit's sampling end with current-limiting switch circuit electricity is connected, feedback circuit's feedback end with the control circuit electricity is connected.
The sampling circuit is connected with the feedback circuit, and the sampling end of the voltage stabilizing circuit is electrically connected with the feedback circuit.
Further, the voltage stabilizing circuit comprises a relay J1, a triode Q2, a diode D3, a voltage stabilizing diode DZ7 and a photoelectric coupler TF 2; the switch fixed contact of the relay J1 is electrically connected with the current-limiting switch circuit, the normally closed switch contact of the relay J1 is electrically connected with the energy storage circuit, the first coil contact of the relay J1 is respectively electrically connected with the cathode of the diode D3 and the collector of the triode Q2, the second coil contact of the relay J1 is electrically connected with the anode of the diode D3 and grounded, the emitter of the triode Q2 is electrically connected with the anode of the power supply 12V, the base of the triode Q2 is electrically connected with the secondary input end of the photoelectric coupler TF2 through a resistor R7, the primary input end of the photoelectric coupler TF2 is electrically connected with the anode of the voltage-stabilizing diode DZ7 through a resistor R6, and the cathode of the voltage-stabilizing diode DZ7 is electrically connected with the feedback circuit.
The current limiting switch circuit is characterized by further comprising a rectifying circuit electrically connected with the input end of the current limiting switch circuit, and the input end of the rectifying circuit is electrically connected with an alternating current power supply.
Further, the rectifying circuit comprises a rectifying bridge BD1 and a capacitor E1, and the positive terminal of the rectifying bridge BD1 is electrically connected with the input terminal of the current-limiting switch circuit and the capacitor E1, respectively.
Further, the control circuit comprises a chip U1, an output terminal Vout of the chip U1 is electrically connected with a control terminal of the current-limiting switch circuit, a current sampling terminal Ise of the chip U1 is electrically connected with the current-limiting switch circuit through a resistor R2, and a compensation terminal Vcomp of the chip U1 is electrically connected with the feedback circuit through a resistor R4.
Further, the model of the chip is UC 3843.
Further, the current-limiting switch circuit includes a MOS transistor Q1, a diode D1, a capacitor E2, an inductor L1, and a resistor R3, the positive terminal of the capacitor E2 is electrically connected to the cathode of the diode D1 and serves as an input terminal of the current-limiting switch circuit, the negative terminal of the capacitor E2 is electrically connected to the drain of the MOS transistor Q1 through the inductor L1, the anode of the diode D1 is electrically connected to the drain of the MOS transistor Q1, the gate of the MOS transistor Q1 is electrically connected to the output terminal of the control circuit, the source of the MOS transistor Q1 is electrically connected to one end of the resistor R3 and the control circuit, and the other end of the resistor R3 is grounded.
Further, the feedback circuit comprises a photocoupler TF1, and a zener diode DZ1, a zener diode DZ2, a zener diode DZ3, a zener diode DZ4, a zener diode DZ5 and a zener diode DZ6 which are connected in series in such a way that the anode is connected with the cathode in sequence, the cathode of the zener diode DZ1 is electrically connected with the current limiting switch circuit, and the anode of the zener diode DZ6 is electrically connected with the primary input end of the photocoupler TF1 through a resistor R5.
Further, a diode D2 is connected between the current-limiting switch circuit and the energy storage circuit, an anode of the diode D2 is electrically connected with an output end of the current-limiting switch circuit, and the diode D2 is electrically connected with an input end of the energy storage circuit.
Has the advantages that: the control circuit controls the on-time of the current-limiting switch circuit according to the current feedback signal of the current-limiting switch circuit and the voltage feedback signal of the feedback circuit, so that the current-limiting or voltage-stabilizing purpose can be achieved respectively;
in addition, the voltage stabilizing circuit can prevent the energy storage circuit from being damaged due to overvoltage charging.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a schematic block diagram of a first preferred embodiment of the present invention;
FIG. 2 is a schematic block diagram of a second preferred embodiment of the present invention;
FIG. 3 is a schematic block diagram of a third preferred embodiment of the present invention;
FIG. 4 is a schematic diagram of the circuit hardware connections of a preferred embodiment of the present invention;
fig. 5 is a schematic diagram of the structural connection of the permanent magnet switch controller of the present invention applied to a preferred embodiment;
fig. 6 is a schematic diagram of the structure of the permanent magnet switch according to a preferred embodiment of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1, in a first preferred embodiment, an energy storage charging and discharging control module includes a feedback circuit 40, and a control circuit 10, a current limiting switch circuit 20, and an energy storage circuit 30, which are electrically connected in sequence, where a sampling end of the feedback circuit 40 is electrically connected to the current limiting switch circuit 20, and a feedback end of the feedback circuit 40 is electrically connected to the control circuit 10.
The power signal is input from the input end of the current-limiting switch circuit 20, and then enters the energy storage circuit 30 to complete charging, the output end of the control circuit 10 is connected with the control end of the current-limiting switch circuit 20, meanwhile, the control circuit 10 can collect the current signal of the current-limiting switch circuit 20, the control circuit 10 controls the turn-on time of the current-limiting switch circuit 20 according to the magnitude of the current signal, thereby achieving the purpose of current limiting, namely, the control circuit 10 can avoid the charging current of the energy storage circuit 30 from being too large by controlling the on-off state of the current-limiting switch circuit 20, in addition, the feedback circuit 40 can collect the magnitude of the output voltage of the current-limiting switch circuit 20 and feed back the output voltage to the control circuit 10 in real time, the control circuit 10 controls the on-off state of the current-limiting switch circuit 20 according to the voltage signal of the feedback circuit 40.
Referring to fig. 2, a second preferred embodiment is different from the above embodiment in that: and the constant voltage circuit 50 is connected between the current-limiting switch circuit 20 and the energy storage circuit 30 in series, and a sampling end of the constant voltage circuit 50 is electrically connected with the feedback circuit 40. The voltage stabilizing circuit 50 is added, so that when the current limiting switch circuit 20 or the control circuit 10 is abnormal, the damage of the energy storage circuit 30 caused by the overlarge voltage at two ends of the energy storage circuit 30 can be prevented.
Referring to fig. 3, a third preferred embodiment is different from the above embodiments in that: the power supply further comprises a rectifying circuit 60 electrically connected with the input end of the current-limiting switch circuit 20, and the input end of the rectifying circuit 60 is electrically connected with an alternating current power supply. Adopt arrangement circuit, can make the utility model discloses be connected with the alternating current, utilize rectifier circuit 60 to make the alternating current convert stable direct current voltage input current-limiting switch circuit 20 to the realization charges for energy storage circuit 30 steadily.
Referring to fig. 4, a circuit hardware connection diagram of a preferred embodiment is shown, in which the rectification circuit 60 includes a rectifier bridge BD1 and a capacitor E1, a positive terminal of the rectifier bridge BD1 is electrically connected to an input terminal of the current-limiting switch circuit 20 and a positive terminal of the capacitor E1, respectively, a negative terminal of the rectifier bridge BD1 and a negative terminal of the capacitor E1 are simultaneously grounded, an input terminal of the rectifier bridge is electrically connected to the connection port CON, and when an ac power is required to be externally connected, the ac power is connected to the connection port CON, wherein the rectifier bridge BD1 converts the ac power into a dc power, and the capacitor E1 performs a filtering function to reduce an ac ripple factor, so that a dc voltage can be smoothly output.
The control circuit 10 comprises a chip U1, and a power supply terminal Vcc of a chip U1 is electrically connected with a direct-current power supply 12V; an output end Vout of the chip U1 is electrically connected with a control end of the current-limiting switch circuit 20, and the output end Vout of the chip U1 outputs a PWM control signal; the ground terminal GND of the chip U1 and the voltage feedback terminal Vfb of the chip U1 are grounded, respectively; the current sampling end Ise of the chip U1 is electrically connected with the current-limiting switch circuit 20 through a resistor R2, and when the voltage of the current sampling end Ise is greater than 1V, the chip U1 cuts off the PWM control signal output, so that the control ratio is reduced; the compensation end Vcomp of the chip U1 is electrically connected with the feedback circuit 40 through the resistor R4, and when the voltage of the compensation end Vcomp is less than 2.5V, the chip U1 cuts off the PWM control signal output, so that the duty ratio is reduced; the reference voltage input terminal Vref of the chip U1 is electrically connected to one end of the resistor R1, the other end of the resistor R1 is electrically connected to one end of the capacitor C1 and the oscillation frequency input terminal RT/CT of the chip U1, and the other end of the capacitor C1 is grounded. Wherein the resistor R1 and the capacitor C1 form an RC loop that determines the frequency of the PWM control signal.
Preferably, the model of the chip is UC 3843.
Preferably, the current-limiting switch circuit 20 includes a MOS transistor Q1, a diode D1, a capacitor E2, an inductor L1, and a resistor R3, wherein a positive terminal of the capacitor E2 is electrically connected to a cathode of the diode D1 and is electrically connected to a positive terminal of the rectifier bridge BD1 as an input terminal of the current-limiting switch circuit 20, a negative terminal of the capacitor E2 is electrically connected to a drain of the MOS transistor Q1 through the inductor L1, an anode of the diode D1 is electrically connected to a drain of the MOS transistor Q1, a gate of the MOS transistor Q1 is used as a control terminal of the current-limiting switch circuit 20 and is electrically connected to an output terminal Vout of a chip U1 in the control circuit 10, a source of the MOS transistor Q1 is grounded through a resistor R3, and a source of the MOS transistor Q1 is electrically connected to a current sampling terminal Ise of the chip U. In this embodiment, the rectifying circuit 60 outputs a voltage of DC310V, the control circuit 10 controls the on/off of the MOS transistor Q1 according to the PWM control signal output by the chip U1, and when the MOS transistor Q1 is turned on, the inductor L1 is used to charge the capacitor E2. The diode D1 is a freewheeling diode, and when the MOS transistor Q1 is turned off, the reverse voltage stored at the two ends of the inductor L1 charges the capacitor E2 through the diode D1, so as to reduce the influence of the reverse voltage on the MOS transistor Q1.
The feedback circuit 40 comprises a photocoupler TF1, and a voltage stabilizing diode DZ1, a voltage stabilizing diode DZ2, a voltage stabilizing diode DZ3, a voltage stabilizing diode DZ4, a voltage stabilizing diode DZ5 and a voltage stabilizing diode DZ6 which are sequentially connected in series in a mode that the anode is connected with the cathode, the cathode of the voltage stabilizing diode DZ1 is electrically connected with the positive electrode end of a capacitor E2, and the anode of a voltage stabilizing diode DZ6 is electrically connected with the input end of the primary side of the photocoupler TF1 through a resistor R5. The primary input end of the photoelectric coupler TF1 is electrically connected with the compensation end Vcomp of the chip U1 through a resistor R4, the primary output end of the photoelectric coupler TF1 is grounded, and the secondary output end of the photoelectric coupler TF1 is electrically connected with the negative electrode end of the energy storage circuit 30. When the voltage at the two ends of the capacitor E2 is greater than DC22V, the zener diode DZ1, the zener diode DZ2, the zener diode DZ3, the zener diode DZ4, the zener diode DZ5, and the zener diode DZ6 are reversely turned on, the photocoupler TF1 is turned on, the voltage of the compensation end Vcomp of the chip U1 is reduced, and the output Vout of the chip U1 controls the turn-on time of the MOS transistor Q1, so that the voltage at the two ends of the capacitor E2 is kept stable.
Preferably, the voltage stabilizing circuit 50 comprises a relay J1, a triode Q2, a diode D3, a zener diode DZ7 and a photoelectric coupler TF 2; the switch fixed contact of the relay J1 is electrically connected with the capacitor E2, the normally closed switch contact of the relay J1 is electrically connected with the energy storage circuit, the first coil contact of the relay J1 is electrically connected with the cathode of the diode D3 and the collector of the triode Q2 respectively, the second coil contact of the relay J1 is electrically connected with the anode of the diode D3 and grounded, the emitter of the triode Q2 is electrically connected with the positive electrode of the power supply 12V, the base of the triode Q2 is electrically connected with the secondary input end of the photocoupler TF2 through the resistor R7, the primary input end of the photocoupler TF2 is electrically connected with the anode of the zener diode DZ7 through the resistor R6, the primary output end of the photocoupler TF2 is electrically connected with the negative electrode end of the energy storage circuit, the secondary output end of the photocoupler TF2 is grounded, and the cathode of the zener diode DZ. When the voltage of the capacitor E2 is larger than DC240V due to the damage and failure of the chip U1 or the MOS transistor Q1, the zener diode DZ1, the zener diode DZ2, the zener diode DZ3, the zener diode DZ4, the zener diode DZ5, the zener diode DZ6, and the zener diode DZ7 are simultaneously turned on, so that the photocoupler TF2 is turned on, the transistor Q2 is driven to be turned on, the relay J1 is powered on, the normally closed relay J1 is opened, and the current limiting switch circuit 20 and the energy storage circuit 30 are disconnected, thereby avoiding the damage of the energy storage circuit 30 due to the over-high voltage.
The tank circuit 30 includes a tank capacitor E3. In general, the positive terminal of the energy storage capacitor E3 may be directly electrically connected to the positive terminal of the capacitor E2, wherein a diode D2 may be further connected between the positive terminal of the energy storage capacitor E3 and the positive terminal of the capacitor E2, the anode of the diode D2 is electrically connected to the positive terminal of the capacitor E2, the diode D2 is electrically connected to the positive terminal of the energy storage capacitor E3, and the diode D2 may be used to prevent the energy storage capacitor E3 from reversely charging the capacitor E2. In this embodiment, the positive terminal and the negative terminal of the energy storage capacitor E3 are respectively connected to two normally closed switch contacts of the relay J1, and two switch fixed contacts of the relay J1 are respectively connected to two terminals of the capacitor E2, wherein a diode D2 is further connected between the positive terminal of the capacitor E2 and the switch fixed contacts, the anode of the diode D2 is connected to the positive terminal of the capacitor E2, and the cathode of the diode D2 is connected to the switch fixed contacts, that is, the relay J1 controls the connection state between the capacitor E2 and the energy storage capacitor E3. The condition that the energy storage capacitor E3 is damaged due to overhigh capacitance is avoided.
Refer to fig. 5, for the utility model discloses use in an embodiment of permanent magnet switch controller, wherein permanent magnet switch controller still includes switching power supply module, electric capacity voltage detection module, opto-coupler isolation combined floodgate input module, opto-coupler isolation separating brake input module, IGBT double bridge discharge unit, opto-coupler isolation circuit breaker state input module, CPU, energy storage pilot lamp, closes a pilot lamp and a branch position pilot lamp except that energy storage charge-discharge control module. The connection relationship of the modules is shown in fig. 5, wherein an alternating current of 220V is input through the input end of the rectifying circuit 60 in the energy storage charging and discharging control module, and then the output end of the energy storage circuit 30 is electrically connected with the IGBT double-bridge discharging unit and the capacitor voltage detection module respectively.
Referring to fig. 6, a schematic structural diagram of a permanent magnet switch connected to the permanent magnet switch controller is shown, where the permanent magnet switch includes a main breaker QF, a manual release interlock, a normally open auxiliary switch, an excitation coil, and a normally closed auxiliary switch, where the normally open auxiliary switch includes a switch S1, a switch S2, a switch S3, a switch S4, a switch S5, and a switch S6; the exciting coils comprise a coil YA1, a coil YA2 and a coil YA 3; the normally closed auxiliary switch comprises a switch S7, a switch S8, a switch S9, a switch S10, a switch S11, a switch S12 and a switch S13. The connection relationship of the components of the permanent magnet switch can refer to fig. 6. Wherein a1, a2, A3 and a4 in fig. 6 and fig. 5 are respectively connected in a one-to-one correspondence, and the working principle is as follows:
the alternating current 220V is input into the permanent magnet switch controller, the energy storage capacitor E3 is charged through the energy storage charging and discharging module, and the alternating current 220V is converted into DC5V and DC24V through the switching power supply module.
Whether the energy storage capacitor E3 is full is detected through capacitor voltage detection, and the result is fed back to the CPU.
When a closing button S14 or an opening button S15 is pressed, the signals are respectively input to a CPU through an optical coupling isolation closing input module and an optical coupling isolation opening module, and the CPU drives an exciting coil of a permanent magnet switch through an IGBT double-bridge discharging unit.
The permanent magnet switch main breaker QG is driven to be closed by driving the exciting coil, the switch auxiliary switch of the permanent magnet switch main breaker QG is closed, and the normally closed auxiliary switch of the permanent magnet switch main breaker QG is opened. The permanent magnet switch controller judges by detecting the switch state of the switch S13 which is the 15 th pin and the 16 th pin of the permanent magnet switch, the permanent magnet switch is in the on position, so the CPU drives the on position indicator lamp to light. Similarly, when the permanent magnet switch is in the open position, the permanent magnet switch controller judges the open position by detecting the switch states of the 15 th pin and the 16 th pin of the permanent magnet switch, namely the switch S13, so that the CPU drives the opening indicating lamp to light.
The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments, and the technical effects of the present invention should be all included in the protection scope of the present invention as long as the technical effects are achieved by any of the same or similar means.
Claims (10)
1. An energy storage charge and discharge control module is characterized in that: the sampling end of the feedback circuit is electrically connected with the current-limiting switch circuit, and the feedback end of the feedback circuit is electrically connected with the control circuit.
2. The energy storage charge and discharge control module of claim 1, wherein: the sampling circuit is characterized by also comprising a voltage stabilizing circuit connected in series between the current limiting switch circuit and the energy storage circuit, wherein the sampling end of the voltage stabilizing circuit is electrically connected with the feedback circuit.
3. The energy storage charge and discharge control module of claim 2, wherein: the voltage stabilizing circuit comprises a relay J1, a triode Q2, a diode D3, a voltage stabilizing diode DZ7 and a photoelectric coupler TF 2; the switch fixed contact of the relay J1 is electrically connected with the current-limiting switch circuit, the normally closed switch contact of the relay J1 is electrically connected with the energy storage circuit, the first coil contact of the relay J1 is respectively electrically connected with the cathode of the diode D3 and the collector of the triode Q2, the second coil contact of the relay J1 is electrically connected with the anode of the diode D3 and grounded, the emitter of the triode Q2 is electrically connected with the anode of the power supply 12V, the base of the triode Q2 is electrically connected with the secondary input end of the photoelectric coupler TF2 through a resistor R7, the primary input end of the photoelectric coupler TF2 is electrically connected with the anode of the voltage-stabilizing diode DZ7 through a resistor R6, and the cathode of the voltage-stabilizing diode DZ7 is electrically connected with the feedback circuit.
4. The energy storage charge and discharge control module of claim 1, wherein: the rectifier circuit is electrically connected with the input end of the current-limiting switch circuit, and the input end of the rectifier circuit is electrically connected with an alternating current power supply.
5. The energy storage charge and discharge control module of claim 4, wherein: the rectifying circuit comprises a rectifying bridge BD1 and a capacitor E1, and the positive end of the rectifying bridge BD1 is electrically connected with the input end of the current-limiting switch circuit and the capacitor E1 respectively.
6. The energy storage charge and discharge control module of claim 1, wherein: the control circuit comprises a chip U1, an output end Vout of the chip U1 is electrically connected with a control end of the current-limiting switch circuit, a current sampling end Ise of the chip U1 is electrically connected with the current-limiting switch circuit through a resistor R2, and a compensation end Vcomp of the chip U1 is electrically connected with the feedback circuit through a resistor R4.
7. The energy storage charge and discharge control module of claim 6, wherein: the model of the chip is UC 3843.
8. The energy storage charge and discharge control module of claim 1, wherein: the current-limiting switch circuit comprises a MOS tube Q1, a diode D1, a capacitor E2, an inductor L1 and a resistor R3, wherein the positive end of the capacitor E2 is electrically connected with the cathode of the diode D1 and serves as the input end of the current-limiting switch circuit, the negative end of the capacitor E2 is connected with the drain of the MOS tube Q1 through the inductor L1, the anode of the diode D1 is electrically connected with the drain of the MOS tube Q1, the gate of the MOS tube Q1 is electrically connected with the output end of the control circuit, the source of the MOS tube Q1 is respectively electrically connected with one end of the resistor R3 and the control circuit, and the other end of the resistor R3 is grounded.
9. The energy storage charge and discharge control module of claim 1, wherein: the feedback circuit comprises a photoelectric coupler TF1, and a voltage stabilizing diode DZ1, a voltage stabilizing diode DZ2, a voltage stabilizing diode DZ3, a voltage stabilizing diode DZ4, a voltage stabilizing diode DZ5 and a voltage stabilizing diode DZ6 which are sequentially connected in series in a mode that an anode is connected with a cathode, wherein the cathode of the voltage stabilizing diode DZ1 is electrically connected with the current limiting switch circuit, and the anode of the voltage stabilizing diode DZ6 is electrically connected with the primary input end of the photoelectric coupler TF1 through a resistor R5.
10. The energy storage charge and discharge control module of claim 1, wherein: a diode D2 is further connected between the current-limiting switch circuit and the energy storage circuit, the anode of the diode D2 is electrically connected with the output end of the current-limiting switch circuit, and the diode D2 is electrically connected with the input end of the energy storage circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921241597.3U CN210724225U (en) | 2019-08-01 | 2019-08-01 | Energy storage charge and discharge control module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921241597.3U CN210724225U (en) | 2019-08-01 | 2019-08-01 | Energy storage charge and discharge control module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492558A (en) * | 2019-08-01 | 2019-11-22 | 珠海科盈自动化***有限公司 | A kind of energy storage charge and discharge control module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492558A (en) * | 2019-08-01 | 2019-11-22 | 珠海科盈自动化***有限公司 | A kind of energy storage charge and discharge control module |
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