CN223451665U - Energy storage device charge and discharge control circuit and energy storage device - Google Patents
Energy storage device charge and discharge control circuit and energy storage deviceInfo
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- CN223451665U CN223451665U CN202422881680.4U CN202422881680U CN223451665U CN 223451665 U CN223451665 U CN 223451665U CN 202422881680 U CN202422881680 U CN 202422881680U CN 223451665 U CN223451665 U CN 223451665U
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Abstract
The application discloses a charge-discharge control circuit of energy storage equipment and the energy storage equipment, wherein the charge-discharge control circuit comprises a charge interface, a bus capacitor, an inversion input circuit, a pre-charge circuit and a pre-charge circuit, wherein the inversion input circuit comprises a first switch piece and a first filter capacitor, the first switch piece is used for connecting or disconnecting the charge interface and the bus capacitor, the first filter capacitor is connected with the first switch piece, the first switch piece is positioned between the charge interface and the first filter capacitor, the pre-charge circuit comprises a rectifier, the rectifier comprises an alternating current input end and a direct current output end, the alternating current input end is connected with the charge interface, and the direct current output end is connected with the bus capacitor. The high-current impact on the bus capacitor when the first switch piece is closed can be reduced, the service life of the bus capacitor is prolonged, the current impact stress on the first switch piece is reduced, the first switch piece is prevented from being damaged, and the service life of the first switch piece is prolonged.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a charge and discharge control circuit of energy storage equipment and the energy storage equipment.
Background
Currently, in a control circuit of bidirectional inversion, at the moment when a switch (for example, a relay) of the control circuit is closed, a charging current for charging an X capacitor of the control circuit by an external input power supply (for example, a power grid) may be larger than a rated current value which can be born by the relay, so that impact is caused on a contact of the relay, the service life of the relay is further reduced, and even the relay is damaged.
Disclosure of utility model
In view of this, the embodiment of the application provides a charge and discharge control circuit of an energy storage device and the energy storage device, which can avoid current impact on a relay at the moment of closing the relay, avoid damaging the relay, and prolong the service life of the relay.
The charge-discharge control circuit of the energy storage equipment comprises a charge interface, a bus capacitor, an inversion input circuit, a pre-charge circuit and a pre-charge circuit, wherein the inversion input circuit comprises a first switch piece and a first filter capacitor, the first switch piece is used for conducting or disconnecting the connection between the charge interface and the bus capacitor, the first filter capacitor is connected with the first switch piece, the first switch piece is positioned between the charge interface and the first filter capacitor, the pre-charge circuit comprises a rectifier, the rectifier comprises an alternating current input end and a direct current output end, the alternating current input end is connected with the charge interface, and the direct current output end is connected with the bus capacitor.
In some embodiments, the pre-charge circuit further comprises a current limiting device located between the charging interface and the bus capacitor, the current limiting device being configured to limit the current of the pre-charge circuit below a preset current.
In some embodiments, the current limiting device includes at least one of a resistor and an inductor.
In some embodiments, the current limiting device includes a first current limiting device and a second current limiting device, the first end of the bus capacitor is connected to the positive electrode of the dc output terminal, the first current limiting device is located between the first end of the bus capacitor and the positive electrode of the dc output terminal, the second end of the bus capacitor is connected to the negative electrode of the dc output terminal, and the second current limiting device is located between the second end of the bus capacitor and the negative electrode of the dc output terminal.
In some embodiments, the first switching element includes a relay including a first relay and a second relay, the first relay being located on a hot line of the charge-discharge control circuit, and the second relay being located on a neutral line of the charge-discharge control circuit.
In some embodiments, the charge-discharge control circuit further comprises a power factor correction circuit, wherein the power factor correction circuit is used for bidirectional rectification between alternating current and direct current, the power factor correction circuit is located between the direct current output end and the first switch piece, the power factor correction circuit comprises a second switch piece, the second switch piece is used for conducting or disconnecting the direct current output end and the first switch piece, and the second switch piece is disconnected when the charging interface is connected with an external power supply.
In some embodiments, the second switch comprises a diode.
In some embodiments, the charge and discharge control circuit of the energy storage device further comprises a second filter capacitor, wherein the second filter capacitor is positioned between the first filter capacitor and the power factor correction circuit.
In some embodiments, the charge-discharge control circuit of the energy storage device further comprises an inversion output circuit, wherein the inversion output circuit is connected with the inversion input circuit, the first switch piece is further used for conducting connection between the inversion output circuit and the inversion input circuit, and the power supply interface comprises a third switch piece, and the third switch piece is used for conducting or disconnecting connection between the inversion output circuit and the power supply interface.
The energy storage device of the embodiment of the application comprises the charge and discharge control circuit of the energy storage device of any embodiment.
The charge-discharge control circuit of the energy storage device comprises a charge interface, a bus capacitor, an inversion input circuit and a precharge circuit, wherein the inversion input circuit comprises a first switch piece and a first filter capacitor, the first switch piece is used for connecting or disconnecting the charge interface and the bus capacitor, the first filter capacitor is connected with the first switch piece, the first switch piece is positioned between the charge interface and the first filter capacitor, the precharge circuit comprises a rectifier, the rectifier comprises an alternating current input end and a direct current output end, the alternating current input end is connected with the charge interface, and the direct current output end is connected with the bus capacitor. And the pre-charging circuit charges the first filter capacitor before the first switch element is closed, namely, after the voltage of the first filter capacitor is raised through the pre-charging circuit, the first switch element is closed again, the voltage change rate on the first filter capacitor can be reduced, so that the current impact force caused when the mains supply charges the first filter capacitor through the inversion input circuit is reduced, the peak current (surge peak current) generated by the first filter capacitor is avoided to damage the first switch element, the current impact stress born by the first switch element is reduced, and the service life of the first switch element is prolonged.
Additional aspects and advantages of embodiments of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a diagram of an application scenario of a charge and discharge control circuit of an energy storage device according to some embodiments of the present application in the energy storage device;
fig. 2 is a schematic diagram of a charge and discharge control circuit of an energy storage device according to some embodiments of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the embodiments of the present application and are not to be construed as limiting the embodiments of the present application.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, unless specifically defined otherwise.
The control logic of the bidirectional inversion is more complex than other traditional switching power supplies, and a reasonable control strategy is critical to the functions and performances of the bidirectional inversion, so that the voltage stress and the current stress on devices on a circuit can be reduced, the devices are protected, the devices are prevented from being damaged, and the service life of the devices is prolonged.
Currently, in a control circuit for bi-directional inversion, a pi-type filter circuit with one or two stages is generally disposed at an input end of the circuit to suppress electromagnetic interference (Electromagnetic Interference, EMI) of a common mode interference, a differential mode interference, noise, etc. of a power grid input end to a switching power supply. The filter circuit generally includes an X capacitor (a capacitor for suppressing differential mode interference of the power supply electromagnetic wave), and the capacity of the selected X capacitor has a positive correlation with the output power of the bidirectional inverter in the control circuit. That is, as the output power of the bi-directional inverter increases, the capacity of the selected X capacitor increases accordingly.
At the moment when a switch (e.g., a relay) of the circuit is closed, an external alternating current input power supply (for example, a power grid) charges an X capacitor with relatively large impact current (the X capacitor will induce large impact current), so that a contact of the relay needs to bear the instant large current, and the instant current stress of the relay causes large impact on the relay, and the long-time impact current can reduce the reliability of the relay, reduce the service life of the relay, and even damage the relay.
In view of this, the present application provides a charge and discharge control circuit of an energy storage device, and the charge and discharge control circuit of the energy storage device provided by the present application is described in detail below.
Referring to fig. 1, an embodiment of the present application provides a charge and discharge control circuit 100 of an energy storage device 1000, and as shown in fig. 1, the energy storage device 1000 includes the charge and discharge control circuit 100. External power sources connected to the energy storage device 1000 to charge the energy storage device 1000 include, but are not limited to, alternating current utility (grid), power generation devices (e.g., photovoltaic power generation devices, alternating current power generation devices, etc.). For convenience of description, in the embodiment of the present application, an external power source connected to the energy storage device 1000 is exemplified as an ac utility (power grid).
Referring to fig. 2, the charge and discharge control circuit 100 of the energy storage device 1000 includes:
A charging interface 10;
a bus capacitor 20;
The inverter input circuit 30, the inverter input circuit 30 includes a first switch element 31 and a first filter capacitor 32, the first switch element 31 is used for connecting or disconnecting the charging interface 10 and the bus capacitor 20, the first filter capacitor 32 is connected with the first switch element 31, and the first switch element 31 is located between the charging interface 10 and the first filter capacitor 32;
The pre-charging circuit 40, the pre-charging circuit 40 includes a rectifier 41, the rectifier 41 includes an ac input terminal and a dc output terminal, the ac input terminal is connected to the charging interface 10, and the dc output terminal is connected to the bus capacitor 20.
The energy storage device 1000 is connected to the mains via the charging interface 10 for charging. For example, referring to fig. 2, the charge-discharge control circuit 100 includes a charge interface 10, the charge interface 10 includes a first charge interface 11 and a second charge interface 12, the first charge interface 11 is connected to a live wire (L-line) of a utility power, and the second charge interface 12 is connected to a neutral wire (N-line) of the utility power.
Referring to fig. 2, the bus capacitor 20 may be a capacitor connected to a bus (a main conductor for connecting and distributing power) of the charge/discharge control circuit 100. The bus capacitor 20 may help balance the voltage of the charge-discharge control circuit 100, reduce voltage fluctuations in the circuit, improve circuit stability, and the like.
Wherein the inverter input circuit 30 is connected to the charging interface 10 for receiving the alternating current input from the charging interface 10.
The first filter capacitor 32 may include an X capacitor, and may be used to suppress differential mode interference in the charge/discharge control circuit 100.
Alternatively, the first switching element 31 includes a relay including a first relay 311 and a second relay 312, the first relay 311 is located at an L line of the charge and discharge control circuit 100, and the second relay 312 is located at an N line of the charge and discharge control circuit 100.
The first relay 311 is disposed on the L line of the charge/discharge control circuit 100 to control the charge interface 10 and the bus capacitor 20 to be turned on or off at the L line, and the second relay 312 is disposed on the N line of the charge/discharge control circuit 100 to control the charge interface 10 and the bus capacitor 20 to be turned on or off at the N line.
The first relay 311 and the second relay 312 may be normally open relays. Since the first relay 311 and the second relay 312 are normally open, in the case where the charging interface 10 is connected to the electric power supply, the voltage input from the charging interface 10 can only flow to the third filter capacitor CX1 and the common-mode inductance L1 (for suppressing the common-mode interference in the circuit).
The pre-charging circuit 40 is connected to the charging interface 10 and the bus capacitor 20, and may be used to charge the bus capacitor 20.
The rectifier 41 may be used to rectify alternating current into direct current, for example, the rectifier 41 may be a bridge stack or the like. The rectifier 41 is connected to the live and neutral lines of the mains supply, and the ac power is rectified to dc power by the rectifier 41. And one end of the bus capacitor 20 is connected with the positive electrode of the direct current output end, and the other end is connected with the negative electrode of the direct current output end, so that the direct current output by the direct current output end charges the bus capacitor 20.
Specifically, referring to fig. 2, the charge/discharge control circuit 100 of the energy storage device 1000 includes a charge interface 10, a bus capacitor 20, an inverter input circuit 30, and a pre-charge circuit 40. One end of the bus capacitor 20 is connected with an L line of the mains supply, the other end is connected with an N line of the mains supply, and the bus capacitor 20 is grounded. The inverting input circuit 30 includes a first switching element 31 and a first filter capacitor 32, and when the first switching element 31 is closed, the connection between the charging interface 10 and the bus capacitor 20 is conducted. While the first switch element 31 is arranged between the charging interface 10 and the first filter capacitor 32, i.e. the closing and opening of the first switch element 31 does not affect the connection between the first filter capacitor 32 and the busbar capacitor 20.
Referring to fig. 2, the charging interface 10 is connected to a mains supply to receive an ac current, and the ac current flows to the inverter input circuit 30 through the charging interface 10, and when the first switch element 31 is closed, the current flows to the bus capacitor 20 after passing through the first switch element 31 and the first filter capacitor 32 in sequence. If the bus capacitor 20 is not charged at this time, a large current of the mains supply will be instantaneously flushed to the bus capacitor 20 (to charge the bus capacitor 20), which may cause damage to the bus capacitor 20, and in the case that the large current of the mains supply flows to the first filter capacitor 32 and charges the first filter capacitor 32, peak currents may be generated in the inverter input circuit 30, these peak currents may exceed the rated current value of the first switch element 31, resulting in damage to the first switch element 31, and the peak currents may also cause current fluctuation in the inverter input circuit 30, which may cause arc formation, further damaging the first switch element 31.
Therefore, by providing the precharge circuit 40, the precharge circuit 40 includes a rectifier 41, and the rectifier 41 includes an ac input terminal connected to the charging interface 10 and a dc output terminal connected to the bus capacitor 20. When the charging interface 10 is connected to the mains supply, the alternating current flows to the alternating current input end of the rectifier 41 through the charging interface 10, and flows to the bus capacitor 20 from the direct current output end after being rectified into direct current by the rectifier 41, so as to charge the bus capacitor 20, and the large current impact on the bus capacitor 20 when the first switch element 31 is closed is reduced. Current may also flow through the bus capacitor 20 to the first filter capacitor 32 to charge the first filter capacitor 32, thereby raising the voltage of the first filter capacitor 32 (e.g., raising the voltage of the first filter capacitor 32 to a voltage threshold of 1/5, 1/6, etc. of the charging voltage of the first filter capacitor 32).
It will be appreciated that the magnitude of the charging current that charges the capacitor when it is charged is proportional to the rate of change of the voltage of the capacitor (the rate of change between the charge start voltage of the capacitor when it is charged and the charge completion voltage after it is charged (dv/dt)). Therefore, under the condition that the first switch element 31 is closed after the voltage of the first filter capacitor 32 is raised, the voltage change rate on the first filter capacitor 32 can be reduced, the current impact force caused when the mains supply charges the first filter capacitor 32 through the inverter input circuit 30 is slowed down, the first switch element 31 is prevented from being damaged by the peak current (surge peak current) generated by the first filter capacitor 32, the current impact stress received by the first switch element 31 is reduced, the arc is avoided to be formed, and the service life of the first switch element 31 is prolonged.
In this way, the charge-discharge control circuit 100 of the energy storage device 1000 includes the charging interface 10, the bus capacitor 20, the inverter input circuit 30 and the pre-charging circuit 40, the inverter input circuit 30 includes the first switch element 31 and the first filter capacitor 32, the first switch element 31 is used for switching on or off the connection between the charging interface 10 and the bus capacitor 20, the first filter capacitor 32 is connected to the first switch element 31, the first switch element 31 is located between the charging interface 10 and the first filter capacitor 32, the pre-charging circuit 40 includes the rectifier 41, the rectifier 41 includes the ac input end and the dc output end, the ac input end is connected to the charging interface 10, and the dc output end is connected to the bus capacitor 20. The pre-charging circuit 40 charges the bus capacitor 20 and the first filter capacitor 32 before the first switch element 31 is closed, so that large current impact on the bus capacitor 20 can be reduced, the pre-charging circuit 40 charges the first filter capacitor 32, namely, after the voltage of the first filter capacitor 32 is raised by the pre-charging circuit 40, the first switch element 31 is closed again, so that the voltage change rate on the first filter capacitor 32 is reduced, the current impact force caused when the mains supply charges the first filter capacitor 32 through the inverter input circuit 30 is slowed down, the peak current (surge current) generated by the first filter capacitor 32 is prevented from damaging the first switch element 31, the current impact stress borne by the first switch element 31 is reduced, the arc is prevented from being formed, and the service life of the first switch element 31 is prolonged.
In some embodiments, the charge and discharge control circuit 100 of the energy storage device 1000 further includes:
the power factor correction circuit 50 is used for bidirectional rectification between alternating current and direct current, the power factor correction circuit 50 is positioned between the direct current output end and the first switch piece 31, the power factor correction circuit 50 comprises a second switch piece, the second switch piece is used for conducting or disconnecting the direct current output end and the first switch piece 31, and the second switch piece is disconnected when the charging interface 10 is connected with an external power supply.
The power factor correction circuit 50 (Power Factor Correction Circuit, PFC circuit 50) may improve the utilization ratio of the energy storage device 1000 to electric energy, and the PFC circuit 50 may also rectify ac to dc and rectify dc to ac.
Wherein the second switch element comprises one or more diodes, which may be at least one of rectifier diodes and metal oxide semiconductor field effect transistors (Metal Oxide Semiconductor, MOS transistors). Referring to fig. 2, the second switching element may include a diode Q2 and a diode Q3.
Optionally, the charge and discharge control circuit 100 of the energy storage device 1000 further includes:
The second filter capacitor 60, the second filter capacitor 60 is located between the first filter capacitor 32 and the pfc circuit 50.
Specifically, the current output from the dc output terminal can be rectified into ac by the PFC circuit 50. When the second switching element of PFC circuit 50 is closed, a conduction is established between the dc output and first switching element 31. The current output from the dc output terminal may flow to the first filter capacitor 32 after passing through the bus capacitor 20 and the PFC circuit 50, so as to charge the first filter capacitor 32. That is, referring to fig. 1, before the first relay 311 and the second relay 312 are closed, the second switch element (the diode Q2 and the diode Q3 are closed) may be closed, so that the voltage charged by the pre-charging circuit 40 to the bus capacitor 20 passes through the diode Q2, reaches the second filter capacitor 60 (sequentially passes through the diode Q2, the PFCL inductor and the C1 capacitor), charges the second filter capacitor 60, passes through the second filter capacitor 60 and the inductor L2, reaches the first filter capacitor 32, charges the first filter capacitor 32, and thus, the voltage of the first filter capacitor 32 and the second filter capacitor 60 is raised in advance before the first switch element 31 is closed. Then, at the moment when the first switch element 31 is closed, the impact of the mains supply to the first filter capacitor 32 and the second filter capacitor 60 can be reduced, the generation of peak surge current is avoided, the protection of the relay is realized, and the service life of the relay is prolonged.
Referring to fig. 2, fig. 2 exemplarily shows a flow direction of current (an arrow is a current flow direction) in a case where the diode Q2 and the diode Q3 are closed. After the current flows from the bus capacitor 20 to the PFC circuit 50, since the PFC circuit 50 is grounded, a part of the current flows to the ground, and the other part flows to the first filter capacitor 32 and the second filter capacitor 60 after passing through the diode Q2 and the diode Q3. Thus, the first filter capacitor 32 and the second filter capacitor 60 may be charged by closing the diode Q2 and the diode Q3 (e.g., closing for a period of several alternating current cycles).
It can be understood that, since the capacitor C1 and the bus capacitor 20 are in parallel connection (operate under the same voltage), the first switch element 31 is closed again when the positive half period of the mains supply (i.e. the L voltage signal is positive and the N voltage signal is negative) is detected by detecting the ac cycle of the mains supply, so that the current smoothly flows to the bus capacitor 20 (and the capacitor C1), and the impact of the peak surge current on the relay is further avoided.
Referring to fig. 2 again, when the first switch 31 is closed, the current sequentially flows through the first filter capacitor 32, the inductor L2 and the second filter capacitor 60, that is, the first filter capacitor 32 is disposed before the inductor L2 and can be filtered to provide a stable current input, and the second filter capacitor 60 is disposed after the inductor L2 and can be used for adjusting the current harmonic interference generated by the inductor L2 and improving the circuit stability.
In some embodiments, the pre-charge circuit 40 further includes a current limiting device 42, the current limiting device 42 being located between the charging interface 10 and the bus capacitor 20, the current limiting device 42 being configured to limit the current of the pre-charge circuit 40 below a predetermined current.
Wherein the current limiting device 42 includes at least one of a resistor and an inductance (e.g., a chip inductance).
The preset current may be a maximum charging current value set for protecting the bus capacitor 20 in the precharge circuit 40.
Optionally, the current limiting device 42 includes a first current limiting device and a second current limiting device, where the first end of the bus capacitor 20 is connected to the positive electrode of the dc output, the first current limiting device is located between the first end of the bus capacitor 20 and the positive electrode of the dc output, the second end of the bus capacitor 20 is connected to the negative electrode of the dc output, and the second current limiting device is located between the second end of the bus capacitor 20 and the negative electrode of the dc output.
Specifically, the pre-charging circuit 40 further includes a current limiting device 42, where the current limiting device 42 is disposed between the bus capacitor 20 and the rectifier 41, so that the magnitude of the dc current output by the dc output terminal of the rectifier 41 can be reduced, and the magnitude of the dc current is limited below a preset current, so as to further protect the bus capacitor 20.
The current limiting device 42 includes a first current limiting device (for example, please refer to fig. 2, the first current limiting device includes a resistor R1 with a resistance value of 100 ohms (Ω)) and a second current limiting device (for example, please refer to fig. 2, the second current limiting device includes a resistor R2 with a resistance value of 100 ohms (Ω)), the first end of the bus capacitor 20 is connected to the positive electrode of the dc input terminal of the rectifier 41, the first current limiting device is located between the first end of the bus capacitor 20 and the positive electrode of the dc output terminal, the second end is connected to the negative electrode of the dc output terminal of the rectifier 41, and the second current limiting device is located between the second end of the bus capacitor 20 and the negative electrode of the dc output terminal, so as to limit the current flowing to the bus capacitor 20, further improve the stability of the pre-charging circuit 40, and thus improve the stability of the charging/discharging circuit.
Optionally, the charge and discharge control circuit 100 of the energy storage device 1000 further includes:
The inverter output circuit 70, the inverter output circuit 70 is connected with the inverter input circuit 30, and the first switch element 31 is further used for conducting connection between the inverter output circuit 70 and the inverter input circuit 30;
The power supply interface 80, the inverter output circuit 70 includes a third switching element 71, and the third switching element 71 is used to turn on or off the connection between the inverter output circuit 70 and the power supply interface 80.
Wherein the energy storage device 1000 may output electric energy to an external load through the inverter output circuit 70.
Wherein the power interface 80 may be used to connect a load to power the load. For example, referring to fig. 2, the power supply interface 80 includes a first power supply interface 81 and a second power supply interface 82, where the first power supply interface 81 is used to connect an L line of a load, and the second power supply interface 82 is used to connect an N line of the load to supply power to the load.
Specifically, the charge and discharge control circuit 100 of the energy storage device 1000 further includes an inverter output circuit 70 and a power supply interface 80, the inverter output circuit 70 includes a third switch element 71, and when the third switch element 71 is closed, a connection between the inverter output circuit 70 and the power supply interface 80 may be conducted, and the energy storage device 1000 may supply power to the load through the inverter output circuit 70 and the power supply interface 80.
It should be noted that, after the bus capacitor 20 and the PFC circuit 50 have no fault and stably operate, the pre-charging circuit 40 may be turned off, so that the ac mains supply does not need to flow through the pre-charging circuit 40, which can reduce the power loss of the energy storage device 1000 and increase the power of the energy storage device 1000.
Referring again to fig. 1, an energy storage device 1000 according to an embodiment of the present application includes a charge/discharge control circuit 100 of the energy storage device 1000 according to any of the above embodiments.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (10)
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| CN202422881680.4U CN223451665U (en) | 2024-11-25 | 2024-11-25 | Energy storage device charge and discharge control circuit and energy storage device |
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