Power supply circuit of charge-discharge control device, charge-discharge control device, and vehicle
By replacing relays with bidirectional thyristor modules in the charging and discharging device, the problem of unreliable operation caused by high heat dissipation and mechanical vibration of relays is solved, and low-loss and high-reliability AC power supply access is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BYD CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-07-14
AI Technical Summary
In existing charging and discharging devices, relays suffer from high heat dissipation due to prolonged energization, and malfunctioning contacts due to mechanical collisions and vibrations, resulting in unreliable operation and mechanical wear.
A bidirectional thyristor module is used to replace the relay to enable AC power supply, reduce drive loss to the mA level, avoid mechanical vibration, and use current-type contactless switching devices.
It reduces heat loss, improves operational reliability, and avoids contact problems caused by accidental contact and mechanical wear.
Smart Images
Figure CN224502936U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of new energy technology, and in particular to a power supply circuit, a charging and discharging control device, and a vehicle. Background Technology
[0002] New energy vehicles are equipped with AC charging input terminals, AC discharging output terminals, and charging / discharging control devices. These not only improve the vehicle's energy efficiency and functionality but also provide crucial support for the development of smart grids. The AC charging input terminal is used to connect to an external AC power source, the AC discharging output terminal is used to output internal AC power, and the charging / discharging control device is used to achieve data sampling and charging / discharging control during the charging and discharging process.
[0003] Currently, charging and discharging devices typically use dual-channel relays to draw power from the AC charging input terminal and the AC discharging output terminal. When either the AC charging input terminal or the AC discharging output terminal is energized, the relay connects to the corresponding terminal, thereby achieving the purpose of drawing power.
[0004] Because the relay control coil is energized for a long time, the heat dissipation causes the overall temperature of the control board to rise significantly, posing a risk of overheating when handled. During the use of AC charging and discharging equipment, there is a certain amount of mechanical impact, which can cause vibration and malfunction of the relay contacts, resulting in unreliable operation. Relays are mechanically switched on and off by their contacts, and with the increase in the number of times they are used, the mechanical wear of the contacts can increase the contact resistance or cause poor contact. Utility Model Content
[0005] This application provides a power supply circuit for a charge / discharge control device, a charge / discharge control device, and a vehicle. It uses a bidirectional thyristor module to connect two AC power sources. Compared to a relay, the drive current does not increase with the increase of AC power, which can reduce the drive loss to the mA level, thereby reducing heat loss. The bidirectional thyristor is a current-type contactless switching device, which does not have mechanical vibration. Therefore, it will not cause unreliable operation due to contact mis-touch, nor will it cause problems such as increased impedance or poor contact due to mechanical loss, thus at least partially solving the above-mentioned technical problems.
[0006] To achieve the above objectives, according to a first aspect of this application, a power supply circuit for a charge / discharge control device is provided, comprising a bidirectional thyristor module and a power processing module;
[0007] The first access terminal of the bidirectional thyristor module is used to electrically connect to the AC charging input terminal and the AC discharging output terminal, respectively. The second access terminal of the bidirectional thyristor module is electrically connected to the input terminal of the power processing module. The output terminal of the power processing module is used to electrically connect to the power supply terminal of the power circuit of the charging and discharging control device.
[0008] Optionally, the bidirectional thyristor module includes a first bidirectional thyristor unit and a second bidirectional thyristor unit;
[0009] The first access terminal of the first bidirectional thyristor unit is used to be electrically connected to the AC charging input terminal or the AC discharging output terminal, the first access terminal of the second bidirectional thyristor unit is used to be electrically connected to the AC discharging output terminal or the AC discharging output terminal, and the second access terminal of the first bidirectional thyristor unit and the second access terminal of the second bidirectional thyristor unit are respectively electrically connected to the input terminal of the power processing module.
[0010] Optionally, at least one of the first and second bidirectional thyristor units includes a driving subunit and a bidirectional thyristor.
[0011] The first control electrode of the bidirectional thyristor is electrically connected to the power processing module, and the second control electrode of the bidirectional thyristor is used to be electrically connected to the AC charging input terminal or the AC discharging output terminal. The drive subunit is electrically connected to the gate electrode of the bidirectional thyristor and is used to be electrically connected to the AC charging input terminal or the AC discharging output terminal.
[0012] The drive subunit is used to drive the bidirectional thyristor to conduct according to the AC power supply connected to the AC charging input terminal.
[0013] Optionally, the drive subunit includes a rectifier bridge and a silicon controlled rectifier optocoupler;
[0014] The first input terminal of the rectifier bridge is electrically connected to the second gate electrode of the bidirectional thyristor and the first output terminal of the thyristor optocoupler, and is used to electrically connect to the live wire terminal of the AC charging input terminal or the live wire terminal of the AC discharging output terminal. The second input terminal of the rectifier bridge is electrically connected to the second input terminal of the power processing module and is used to electrically connect to the neutral wire terminal of the AC charging input terminal or the neutral wire terminal of the AC discharging output terminal. The output terminal of the rectifier bridge is electrically connected to the input terminal of the thyristor optocoupler. The second output terminal of the thyristor optocoupler is electrically connected to the gate electrode of the bidirectional thyristor. The first gate electrode of the bidirectional thyristor is electrically connected to the first input terminal of the power processing module.
[0015] Optionally, the bidirectional thyristor unit may also include a clamping subunit;
[0016] The clamping sub-unit is electrically connected between the first and second input terminals of the rectifier bridge and is used to clamp the voltage input to the rectifier bridge.
[0017] Optionally, the clamping sub-unit includes a clamping diode electrically connected between the first and second input terminals of the rectifier bridge.
[0018] Optionally, the bidirectional thyristor unit also includes a current limiting subunit for limiting the current input to the rectifier bridge and clamping subunit;
[0019] The first end of the current limiting subunit is used to electrically connect to the live wire end of the AC charging input terminal or the live wire end of the AC discharging output terminal, and the second end of the current limiting subunit is electrically connected to the first input terminal of the rectifier bridge and the first end of the clamping subunit, respectively.
[0020] Optionally, the current-limiting sub-unit includes a varistor.
[0021] Optionally, the power processing module includes a transformer, a rectifier unit, and a DC-DC conversion unit, wherein the transformer includes a primary winding and a secondary winding;
[0022] The first end of the primary winding is used to electrically connect to the neutral terminal of the AC charging input terminal or the neutral terminal of the AC discharging output terminal, and the second end of the primary winding is used to electrically connect to the live terminal of the AC charging input terminal or the live terminal of the AC discharging output terminal through the bidirectional thyristor module.
[0023] The secondary winding is electrically connected to the input terminal of the rectifier unit, the output terminal of the rectifier unit is electrically connected to the input terminal of the DC-DC converter, and the output terminal of the DC-DC converter is used to connect to the power supply terminal of the power circuit.
[0024] Optionally, the rectifier unit includes a first rectifier subunit and a second rectifier subunit, and the DC-DC conversion unit includes a first DC-DC conversion subunit and a second DC-DC conversion subunit;
[0025] The first end of the secondary winding is electrically connected to the first DC-DC converter unit through the first rectifier unit, and the second end of the secondary winding is electrically connected to the second DC-DC converter unit through the second rectifier unit. The center tap of the secondary winding is used for grounding.
[0026] The first DC-DC conversion subunit is also used to be electrically connected to the first power supply terminal of the power-consuming circuit, and the second DC-DC conversion subunit is also used to be electrically connected to the second power supply terminal of the power-consuming circuit.
[0027] According to a second aspect of this application, a charge / discharge control device is provided, including an electrical circuit for the charge / discharge control device and a power supply circuit for the charge / discharge control device in any of the above embodiments.
[0028] According to a third aspect of this application, a vehicle is provided that includes a power supply circuit for the charge / discharge control device in any of the above embodiments, or includes the charge / discharge control device in any of the above embodiments.
[0029] The power supply circuit of the charging and discharging control device in this application uses a bidirectional thyristor module to connect two AC power sources. Compared with a relay, the drive current does not increase with the increase of AC power, which can reduce the drive loss to the mA level, thereby reducing heat loss. The bidirectional thyristor is a current-type contactless switching device, which does not have mechanical vibration, so there will be no problems such as unreliable working state due to contact mis-touch or increased impedance or poor contact due to mechanical loss.
[0030] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description
[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0032] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.
[0033] Figure 1 This is a schematic diagram of the structure of the charge / discharge control device provided in an exemplary embodiment of this application;
[0034] Figure 2 This is a schematic diagram of the specific structure of the bidirectional thyristor module provided in an exemplary embodiment of this application;
[0035] Figure 3 This is a schematic diagram of the specific structure of the first bidirectional thyristor unit provided in an exemplary embodiment of this application;
[0036] Figure 4 This is a circuit diagram of the power supply circuit of the charging and discharging control device provided in an exemplary embodiment of this application. Detailed Implementation
[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.
[0038] According to the first aspect of this application, Figure 1 As shown, a power supply circuit for a charge / discharge control device is provided, including a bidirectional thyristor module and a power processing module.
[0039] Among them, the bidirectional thyristor module is a module with bidirectional thyristors as its core. In addition to bidirectional thyristors, it may also contain other devices.
[0040] The first access terminal of the bidirectional thyristor module is used to electrically connect to the AC charging input terminal and the AC discharging output terminal, respectively. The second access terminal of the bidirectional thyristor module is electrically connected to the input terminal of the power processing module. The output terminal of the power processing module is used to electrically connect to the power supply terminal of the power circuit of the charging and discharging control device.
[0041] The bidirectional thyristor module is primarily used to connect to AC power. However, the power supply required by the charging / discharging control device is typically DC, and the voltage amplitude is smaller than that of the directly connected AC power. Therefore, the power processing module mainly rectifies and steps down the AC power supplied to the bidirectional thyristor module. Furthermore, since the voltage environment of the power circuit is lower than that of the AC charging input and AC discharging output terminals, the power processing module also provides electrical isolation to prevent crosstalk between high-voltage and low-voltage environments, which could damage related components.
[0042] The power supply circuit of the charging and discharging control device in this application uses a bidirectional thyristor module to connect two AC power sources. Compared with a relay, the drive current does not increase with the increase of AC power, which can reduce the drive loss to the mA level, thereby reducing heat loss. The bidirectional thyristor is a current-type contactless switching device, which does not have mechanical vibration, so there will be no problems such as unreliable working state due to contact mis-touch or increased impedance or poor contact due to mechanical loss.
[0043] like Figure 2 As shown, optionally, the bidirectional thyristor module includes a first bidirectional thyristor unit and a second bidirectional thyristor unit.
[0044] The first access terminal of the first bidirectional thyristor unit is used to be electrically connected to the AC charging input terminal, the first access terminal of the second bidirectional thyristor unit is used to be electrically connected to the AC discharging output terminal, and the second access terminals of the first and second bidirectional thyristor units are respectively electrically connected to the input terminal of the power processing module.
[0045] As in the above embodiments, both the first bidirectional thyristor unit and the second bidirectional thyristor unit are modules with bidirectional thyristors as their core. In addition to bidirectional thyristors, they may also include other devices.
[0046] When the vehicle is in charging mode, the AC charging input terminal is energized, and the corresponding first bidirectional thyristor unit is turned on, thereby connecting the corresponding AC power supply from the AC charging input terminal and transmitting it to the power processing module.
[0047] When the vehicle is in discharge mode, the AC discharge output terminal is energized, and the corresponding second bidirectional thyristor unit is turned on, thereby connecting the corresponding AC power supply from the AC discharge output terminal and transmitting it to the power processing module.
[0048] This embodiment provides corresponding bidirectional thyristor units for the AC charging input terminal and the AC discharging output terminal, which improves the reliability of AC access control. Of course, in other embodiments, the bidirectional thyristor module may also include only one bidirectional thyristor unit. The first input terminal of this bidirectional thyristor unit is used to electrically connect to both the AC charging input terminal and the AC discharging output terminal, and the second input terminal is electrically connected to the power processing module. When the vehicle is in charging or discharging mode, the bidirectional thyristor unit will conduct, thereby connecting the corresponding AC power supply from the AC charging input terminal or the AC discharging output terminal and transmitting it to the power processing module.
[0049] like Figure 3 As shown, optionally, the first bidirectional thyristor unit includes a driver subunit and a bidirectional thyristor.
[0050] The first control electrode of the bidirectional thyristor is electrically connected to the power processing module, the second control electrode of the bidirectional thyristor is used to be electrically connected to the AC charging input terminal, and the drive subunit is electrically connected to the gate electrode of the bidirectional thyristor and is used to be electrically connected to the AC charging input terminal.
[0051] The drive subunit is used to drive the bidirectional thyristor to conduct according to the AC power supply connected to the AC charging input terminal.
[0052] The driving subunit is primarily used to improve the driving stability of the bidirectional thyristor. In other embodiments, the gate of the bidirectional thyristor can also be directly connected to the AC charging input terminal, thereby being directly driven and turned on by the AC power supply connected to the AC charging input terminal.
[0053] It is understood that the second bidirectional thyristor unit may also include a corresponding driver subunit and a bidirectional thyristor.
[0054] like Figure 4As shown, optionally, the first bidirectional thyristor unit includes a bidirectional thyristor Q13, and the corresponding driving subunit includes a rectifier bridge D31 and a thyristor optocoupler U10. The second bidirectional thyristor unit includes a bidirectional thyristor Q12, and the corresponding driving subunit includes a rectifier bridge D30 and a thyristor optocoupler U11. The power processing module includes a transformer T2, a rectifier unit (including a rectifier diode D32 as a first rectifier subunit and a rectifier diode D33 as a second rectifier subunit), and a DC-DC conversion unit (including a voltage regulator chip U12 as a first DC-DC conversion subunit and a voltage regulator chip U13 as a second DC-DC conversion subunit). The transformer includes a primary winding (including a first primary winding Np1 and a second primary winding Np2) and a secondary winding (including a first secondary winding Ns1 and a second secondary winding Ns2 formed by a center tap).
[0055] exist Figure 4 In this circuit, the first input terminal of rectifier bridge D31 is electrically connected to the second control electrode of bidirectional thyristor Q13 and the first output terminal of thyristor optocoupler U10, and is used to connect to the live wire terminal ACL_C of AC charging input terminal. The second input terminal of rectifier bridge D31 is electrically connected to the first terminal of the first primary winding Np1 and is used to connect to the neutral wire terminal ACN_C of AC charging input terminal. The output terminal of rectifier bridge D31 is electrically connected to the input terminal of thyristor optocoupler U10. The second output terminal of thyristor optocoupler U10 is electrically connected to the gate electrode of bidirectional thyristor Q13. The first control electrode of bidirectional thyristor Q13 is electrically connected to the second terminal of the first primary winding Np1.
[0056] When the charging / discharging control device enters the charging mode through pattern recognition, the AC charging input terminal first provides AC power. The live wire terminal ACL_C and the neutral wire terminal ACN_C of the AC charging input terminal have AC power. The drive circuit of the bidirectional thyristor Q13 uses the DC power obtained from the full-bridge rectification of the rectifier bridge D31 to drive the optocoupler U10 to conduct. This, in turn, controls the bidirectional thyristor Q13 to conduct through the connected AC power. At this time, the AC power provided by the live wire terminal ACL_C and the neutral wire terminal ACN_C of the AC charging input terminal can be transmitted to the first primary winding Np1 through the bidirectional thyristor Q13, thereby realizing subsequent energy transfer. The drive circuit design for the bidirectional thyristor Q13 needs to consider the drive current Idrv, which should satisfy IGTM (peak gate current) ≥ Idrv ≥ IGT (gate drive current). Based on the drive requirements, the drive resistor R90 should be selected, satisfying R90 ≤ UACmin (minimum AC voltage) / IGT. The minimum input voltage corresponding to the drive resistor R90 should be calculated, and the maximum resistance required to turn on the bidirectional thyristor Q13 should be determined. Similarly, the drive resistor R89 for the thyristor optocoupler U10 should meet the same selection rules.
[0057] exist Figure 4 In this circuit, the first input terminal of rectifier bridge D30 is electrically connected to the second control electrode of bidirectional thyristor Q12 and the first output terminal of thyristor optocoupler U11, and is used to electrically connect to the live wire terminal ACL_D of AC discharge output terminal. The second input terminal of rectifier bridge D30 is electrically connected to the first terminal of the second primary winding Np2 and is used to electrically connect to the neutral wire terminal ACN_D of AC discharge output terminal. The output terminal of rectifier bridge D30 is electrically connected to the input terminal of thyristor optocoupler U11. The second output terminal of thyristor optocoupler U11 is electrically connected to the gate electrode of bidirectional thyristor Q12. The first control electrode of bidirectional thyristor Q12 is electrically connected to the second terminal of the first primary winding Np1.
[0058] When the charge / discharge control device enters the discharge mode through pattern recognition, the AC discharge output terminal first provides AC power. The live wire terminal ACL_D and the neutral wire terminal ACN_D of the AC discharge output terminal have AC power. The drive circuit of the bidirectional thyristor Q12 uses the DC power obtained from the full-bridge rectification of the rectifier bridge D30 to drive the optocoupler U11 to conduct. This, in turn, controls the bidirectional thyristor Q12 to conduct through the connected AC power. At this time, the AC power provided by the live wire terminal ACL_D and the neutral wire terminal ACN_D of the AC discharge output terminal can be transmitted to the second primary winding Np2 through the bidirectional thyristor Q12, thereby realizing subsequent energy transfer.
[0059] exist Figure 4 In this circuit, the primary windings Ns1 and Ns2 are connected via a center tap, which is used for grounding. The end of the primary winding Ns1 furthest from the center tap is electrically connected to the input terminal VIN of the voltage regulator chip U12 via a rectifier diode D32. The output terminal VOUT of the voltage regulator chip U12 is used to connect to the first power supply terminal of the circuit to provide +12V power. The end of the secondary winding Ns2 furthest from the center tap is electrically connected to the input terminal VIN of the voltage regulator chip U13 via a rectifier diode D33. The output terminal VOUT of the voltage regulator chip U13 is used to connect to the second power supply terminal of the circuit to provide -12V power.
[0060] Transformer T2 is used to achieve electrical isolation and voltage reduction to output 14V AC power. After rectification by rectifier diode D32 and voltage regulation by voltage regulator chip U12, a +12V power supply is obtained. Similarly, after rectification by rectifier diode D33 and voltage regulation by voltage regulator chip U13, a -12V power supply is obtained.
[0061] In this embodiment, rectifier diodes D32 and D33 are used to achieve half-wave rectification. In order to improve the conversion efficiency, in other embodiments, two rectifier bridges can be used to replace rectifier diodes D32 and D33 respectively, thereby achieving full-wave rectification.
[0062] In order to ensure accurate and stable energy transmission, the power demand P1 of the secondary DC load of transformer T2 needs to be converted to the power demand P2 of the primary side. Based on the minimum rated voltage of 176V at the power frequency, the maximum current demand of the primary side is calculated as Imax = P2 / Umin. When selecting bidirectional thyristors Q13 and Q12, their overcurrent capacity is referenced to the maximum current Imax.
[0063] The first DC-DC converter subunit also includes capacitors C41 and C42, and the second DC-DC converter subunit also includes capacitors C43 and C44. Capacitors C41 and C43 are used to implement filtering and voltage regulation on the input side, and capacitors C42 and C44 are used to implement filtering and voltage regulation on the output side.
[0064] When the power demand of the electrical circuit is only +12V, the transformer T2 does not need to be divided into the primary winding Ns1 and the secondary winding Ns2 by the center tap.
[0065] like Figure 4 As shown, optionally, the first bidirectional thyristor unit also includes a clamping diode D42 as a clamping subunit and a varistor R97 as a current limiting subunit.
[0066] exist Figure 4 In the circuit, the cathode of clamping diode D42 is electrically connected to the first input terminal of rectifier bridge D31 and is electrically connected to the live wire terminal ACL_C of AC charging input terminal through varistor R97. The anode of clamping diode D42 is electrically connected to the second input terminal of rectifier bridge D31 and the neutral wire terminal ACN_C of AC charging input terminal, respectively.
[0067] The clamping diode D42 limits the voltage input to the rectifier bridge D31. For example, during surges or lightning strikes, the AC voltage amplitude supplied by the live wire (ACL_C) and neutral wire (ACN_C) of the AC charging input terminals becomes very large, exceeding the clamping voltage of the clamping diode D42, thus causing it to conduct and clamp the voltage to a safe value. Specifically, when the voltage exceeds the maximum peak AC voltage of 265*1.414≈380V, if a 400V TVS diode is selected for the clamping diode D42, then the clamping diode D42 will conduct. When the clamping diode D42 conducts, energy can be quickly discharged through the varistor R97. When the discharge current exceeds the operating current value of the varistor R97, the resistance of the varistor R97 increases rapidly, thereby suppressing the surge current and protecting the clamping diode D42. In addition, when the clamping diode D42 is not conducting, the varistor R97 can also suppress the current input to the rectifier bridge D31 to protect the rectifier bridge D31 and subsequent devices.
[0068] like Figure 4As shown, optionally, the second bidirectional thyristor unit also includes a clamping diode D41 as a clamping subunit and a varistor R98 as a current limiting subunit.
[0069] exist Figure 4 In the rectifier bridge D30, the cathode of the clamping diode D41 is electrically connected to the first input terminal of the rectifier bridge D30 and to the live wire terminal ACL_D of the AC discharge output terminal through the varistor R98. The anode of the clamping diode D41 is electrically connected to the second input terminal of the rectifier bridge D30 and the neutral wire terminal ACN_D of the AC discharge output terminal.
[0070] The functions, distances, and related details of the clamping diode D41 and the varistor R98 can be found in the clamping diode D42 and the varistor R97 in the above embodiment, and will not be repeated here.
[0071] like Figure 4 As shown, optionally, the live wire terminal ACL_C of the AC charging input terminal and the live wire terminal ACL_D of the AC discharging output terminal are electrically connected through the switching device S1, and the neutral wire terminal ACN_C of the AC charging input terminal and the neutral wire terminal ACN_D of the AC discharging output terminal are electrically connected through the switching device S2.
[0072] By controlling the switching states of switching devices S1 and S2, more diverse charging and discharging control can be achieved, and the reliability of charging and discharging control can be improved.
[0073] According to a second aspect of this application, a charge / discharge control device is provided, including an electrical circuit for the charge / discharge control device and a power supply circuit for the charge / discharge control device in any of the above embodiments.
[0074] The power supply circuit of the charging and discharging control device in this application uses a bidirectional thyristor module to connect two AC power sources. Compared with a relay, the drive current does not increase with the increase of AC power, which can reduce the drive loss to the mA level, thereby reducing heat loss. The bidirectional thyristor is a current-type contactless switching device, which does not have mechanical vibration, so there will be no problems such as unreliable operation due to contact mis-touch or increased impedance or poor contact due to mechanical loss.
[0075] According to a third aspect of this application, a vehicle is provided that includes a power supply circuit for the charge / discharge control device in any of the above embodiments, or includes the charge / discharge control device in any of the above embodiments.
[0076] The power supply circuit of the charging and discharging control device included in the vehicle in this application uses a bidirectional thyristor module to connect two AC power sources. Compared with a relay, the drive current does not increase with the increase of AC power, which can reduce the drive loss to the mA level, thereby reducing heat loss. The bidirectional thyristor is a current-type contactless switching device, which does not have mechanical vibration, so there will be no problems such as unreliable operation due to contact mis-touch or increased impedance or poor contact due to mechanical loss.
[0077] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0078] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0079] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.
[0080] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. In the embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant content of other embodiments. Any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.
Claims
1. A power supply circuit for a charging and discharging control device, characterized in that, Includes a bidirectional thyristor module and a power processing module; The first access terminal of the bidirectional thyristor module is used to electrically connect to the AC charging input terminal and the AC discharging output terminal, respectively. The second access terminal of the bidirectional thyristor module is electrically connected to the input terminal of the power processing module. The output terminal of the power processing module is used to electrically connect to the power supply terminal of the power circuit of the charging and discharging control device.
2. The power supply circuit of the charging and discharging control device according to claim 1, characterized in that, The bidirectional thyristor module includes a first bidirectional thyristor unit and a second bidirectional thyristor unit; The first access terminal of the first bidirectional thyristor unit is used to be electrically connected to the AC charging input terminal, the first access terminal of the second bidirectional thyristor unit is used to be electrically connected to the AC discharging output terminal, and the second access terminals of the first bidirectional thyristor unit and the second bidirectional thyristor unit are respectively electrically connected to the input terminal of the power processing module.
3. The power supply circuit of the charging and discharging control device according to claim 2, characterized in that, At least one of the first bidirectional thyristor unit and the second bidirectional thyristor unit includes a driving subunit and a bidirectional thyristor; The first control electrode of the bidirectional thyristor is electrically connected to the power processing module, and the second control electrode of the bidirectional thyristor is used to be electrically connected to the AC charging input terminal or the AC discharging output terminal. The driving subunit is electrically connected to the gate electrode of the bidirectional thyristor and is used to be electrically connected to the AC charging input terminal or the AC discharging output terminal. The driving subunit is used to drive the bidirectional thyristor to conduct according to the AC power supply connected to the AC charging input terminal.
4. The power supply circuit of the charging and discharging control device according to claim 3, characterized in that, The driving subunit includes a rectifier bridge and a silicon controlled rectifier optocoupler; The first input terminal of the rectifier bridge is electrically connected to the second control electrode of the bidirectional thyristor and the first output terminal of the thyristor optocoupler, and is used to electrically connect to the live wire terminal of the AC charging input terminal or the live wire terminal of the AC discharging output terminal. The second input terminal of the rectifier bridge is electrically connected to the second input terminal of the power processing module and is used to electrically connect to the neutral wire terminal of the AC charging input terminal or the neutral wire terminal of the AC discharging output terminal. The output terminal of the rectifier bridge is electrically connected to the input terminal of the thyristor optocoupler. The second output terminal of the thyristor optocoupler is electrically connected to the gate electrode of the bidirectional thyristor. The first control electrode of the bidirectional thyristor is electrically connected to the first input terminal of the power processing module.
5. The power supply circuit of the charging and discharging control device according to claim 4, characterized in that, The bidirectional thyristor unit also includes a clamping subunit; The clamping subunit is electrically connected between the first and second input terminals of the rectifier bridge and is used to clamp the voltage input to the rectifier bridge.
6. The power supply circuit of the charging and discharging control device according to claim 5, characterized in that, The clamping subunit includes a clamping diode electrically connected between the first and second input terminals of the rectifier bridge.
7. The power supply circuit of the charge / discharge control device according to claim 5, characterized in that, The bidirectional thyristor unit also includes a current limiting subunit for limiting the current input to the rectifier bridge and the clamping subunit; The first end of the current limiting subunit is used to be electrically connected to the live wire end of the AC charging input terminal or the live wire end of the AC discharging output terminal, and the second end of the current limiting subunit is electrically connected to the first input terminal of the rectifier bridge and the first end of the clamping subunit, respectively.
8. The power supply circuit of the charging and discharging control device according to claim 7, characterized in that, The current-limiting subunit includes a varistor.
9. The power supply circuit of the charging and discharging control device according to claim 1, characterized in that, The power processing module includes a transformer, a rectifier unit, and a DC-DC conversion unit. The transformer includes a primary winding and a secondary winding. The first end of the primary winding is used to be electrically connected to the neutral wire of the AC charging input terminal or the neutral wire of the AC discharging output terminal, and the second end of the primary winding is used to be electrically connected to the live wire of the AC charging input terminal or the live wire of the AC discharging output terminal through the bidirectional thyristor module. The secondary winding is electrically connected to the input terminal of the rectifier unit, the output terminal of the rectifier unit is electrically connected to the input terminal of the DC-DC converter unit, and the output terminal of the DC-DC converter unit is used to electrically connect to the power supply terminal of the power circuit.
10. The power supply circuit of the charging and discharging control device according to claim 9, characterized in that, The rectifier unit includes a first rectifier subunit and a second rectifier subunit, and the DC-DC conversion unit includes a first DC-DC conversion subunit and a second DC-DC conversion unit; The first end of the secondary winding is electrically connected to the first DC-DC converter unit through the first rectifier subunit, the second end of the secondary winding is electrically connected to the second DC-DC converter unit through the second rectifier subunit, and the center tap of the secondary winding is used for grounding; The first DC-DC conversion subunit is also used to be electrically connected to the first power supply terminal of the power-consuming circuit, and the second DC-DC conversion subunit is also used to be electrically connected to the second power supply terminal of the power-consuming circuit.
11. A charging and discharging control device, characterized in that, The device includes an electrical circuit for a charge / discharge control device and a power supply circuit for a charge / discharge control device as described in any one of claims 1 to 10.
12. A vehicle, characterized in that, It includes the power supply circuit of the charge / discharge control device according to any one of claims 1 to 10, or includes the charge / discharge control device according to claim 11.