CN217994349U - Discharge circuit, charge-discharge system and vehicle - Google Patents
Discharge circuit, charge-discharge system and vehicle Download PDFInfo
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- CN217994349U CN217994349U CN202222333666.1U CN202222333666U CN217994349U CN 217994349 U CN217994349 U CN 217994349U CN 202222333666 U CN202222333666 U CN 202222333666U CN 217994349 U CN217994349 U CN 217994349U
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Abstract
The utility model relates to a discharge circuit, charge-discharge system and vehicle relates to charge-discharge technical field, and this discharge circuit includes: an H-bridge circuit; a first end of the in-vehicle discharging port is connected to the midpoint of the first bridge arm of the H-bridge circuit, and a second end of the in-vehicle discharging port is connected to the midpoint of the second bridge arm of the H-bridge circuit; a first switch unit, a first end of which is connected to a first bus end of the H-bridge circuit and a second bus end of the H-bridge circuit, respectively, and a second end of which is connected to a battery; and the first inductor is arranged between the discharge port in the vehicle and the H-bridge circuit.
Description
Technical Field
The present disclosure relates to the field of charging and discharging technologies, and in particular, to a discharging circuit, a charging and discharging system, and a vehicle.
Background
Nowadays, electric vehicles occupy an important position in the field of automobile markets due to their advantages of green and environmental protection. The electric vehicle is a vehicle which runs by using a power battery as power and driving wheels by using a motor, and the charging and discharging of the battery are important for the electric vehicle. When an electric vehicle is charged and discharged, a charging and discharging system (for example, a vehicle-mounted charger) needs to be separately equipped. However, separately equipping the charge and discharge system increases the cost of the electric vehicle.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems occurring in the related art, the present disclosure provides a discharge circuit, a charge and discharge system, and a vehicle.
In order to achieve the above object, according to a first aspect of an embodiment of the present disclosure, applied to a vehicle, the discharge circuit includes:
an H-bridge circuit;
a first end of the in-vehicle discharging port is connected to the midpoint of the first bridge arm of the H-bridge circuit, and a second end of the in-vehicle discharging port is connected to the midpoint of the second bridge arm of the H-bridge circuit;
a first switch unit, a first end of which is connected to a first bus end of the H-bridge circuit and a second bus end of the H-bridge circuit, respectively, and a second end of which is connected to a battery;
and the first inductor is arranged between the discharge port in the vehicle and the H-bridge circuit.
Optionally, the first switch unit includes a first switch and a second switch, the first switch is connected between the first junction of the H-bridge circuit and the positive electrode of the battery, and the second switch is connected between the first junction of the H-bridge circuit and the negative electrode of the battery.
Optionally, a first bridge arm of the H-bridge circuit includes a first switching tube and a second switching tube, and a second bridge arm of the H-bridge circuit includes a third switching tube and a fourth switching tube;
controlling the first switch and the second switch to be conducted, wherein the current of the positive electrode end of the battery sequentially flows into the negative electrode end of the battery through the first switch tube, the first inductor, the in-vehicle discharging opening and the fourth switch tube; or the current at the positive terminal of the battery flows into the negative terminal of the battery through the third switch tube, the in-vehicle discharging opening, the first inductor and the second switch tube in sequence.
Optionally, the discharge circuit further includes a boost module disposed between the first switch unit and the battery, where the boost module includes a full bridge switch, a second inductor, a third inductor, and a boost capacitor;
the first end of the full-bridge switch is connected with the first confluence end of the H-bridge circuit, and the second end of the full-bridge switch is connected with the second confluence end of the H-bridge circuit;
the midpoint of the second bridge arm of the full-bridge switch is connected with the positive end of the battery through the second inductor, and the midpoint of the first bridge arm of the full-bridge switch is connected with the negative end of the battery through the third inductor;
and the first end of the boost capacitor is connected with the second inductor and the third inductor, and the second end of the boost capacitor is connected with the negative electrode end of the battery.
Optionally, the H-bridge circuit is an H-bridge circuit of a charging DC module of a vehicle-mounted charger, and the boost module is a boost DC module of a motor driving circuit.
Optionally, the discharge circuit further comprises a controller;
the controller is used for controlling the boosting module and the H-bridge circuit to work under the condition that the battery voltage of the battery is smaller than a preset voltage threshold value, so that the battery carries out alternating current discharge through the in-vehicle discharging port;
and the controller is used for controlling the H-bridge circuit to work under the condition that the battery voltage of the battery is greater than or equal to the preset voltage threshold value, so that the battery can perform alternating current discharge through the discharge port in the vehicle.
According to a second aspect of the embodiments of the present disclosure, there is provided a charge and discharge system including an ac charging port, first and second inverters, and a discharge circuit according to the first aspect of the embodiments of the present disclosure;
the first end of the alternating current charging port is connected to the middle point of the bridge arm of the first inverter, and the second end of the alternating current charging port is connected to the middle point of the bridge arm of the second inverter;
a first bus end of the first inverter is connected with a first bus end of the second inverter, a second bus end of the first inverter is connected with a middle point of a bridge arm of the second inverter, the first inverter is an inverter of a motor, and the second inverter is an inverter of an air conditioner compressor;
a first bus end of the H-bridge circuit is connected with a first bus end of the first inverter and a first bus end of the second inverter;
and a second bus end of the H-bridge circuit is connected with a second bus end of the first inverter and a bridge arm midpoint of the second inverter.
Optionally, the motor further includes a first electric control coil, and the air-conditioning compressor further includes a second electric control coil;
the first electric control coil is connected to the midpoint of a bridge arm of the first inverter, and the second electric control coil is connected to the midpoint of a bridge arm of the second inverter;
the current of the first end of the alternating current charging port flows out through the first electric control coil and flows into the second end of the alternating current charging port through the second electric control coil.
Optionally, the system further comprises a fourth inductor; the fourth inductor is arranged between the alternating current charging port and the first inverter;
by controlling the on-off of the switching tube in the first inverter and the switching tube in the second inverter, the current at the first end of the alternating current charging port flows out through the fourth inductor and the switching tube of the first inverter, and flows into the second end of the alternating current charging port through the switching tube of the second inverter.
Optionally, the charging and discharging system further includes a dc charging interface, and the dc charging interface includes a dc positive electrode port and a dc negative electrode port;
the direct current positive pole port is connected with the middle point of a bridge arm of the first inverter;
and the direct current negative pole port is connected with the middle point of a bridge arm of the second inverter.
Optionally, the charging and discharging system further includes a transformer, and the transformer is disposed between the H-bridge circuit and the boost module;
the middle point of a first bridge arm of the H-bridge circuit is connected with a first end of the primary side of the transformer, and the middle point of a second bridge arm of the H-bridge circuit is connected with a second end of the primary side of the transformer;
the midpoint of the first bridge arm of the full-bridge switch is connected with the second end of the secondary side of the transformer, and the midpoint of the second bridge arm of the full-bridge switch is connected with the first end of the secondary side of the transformer.
According to a third aspect of the embodiments of the present disclosure, a vehicle is provided, and the vehicle is provided with a motor and an air conditioner compressor, and the charging and discharging system provided by the second aspect of the embodiments of the present disclosure, wherein a first inverter of the charging and discharging system is an inverter of the motor, and a second inverter of the charging and discharging system is an inverter of the air conditioner compressor.
Through above-mentioned technical scheme, discharge circuit in this disclosure includes: the automobile power supply comprises an H-bridge circuit, an automobile internal discharge opening, a first switch unit and a first inductor, wherein the first end of the automobile internal discharge opening is connected to the middle point of a first bridge arm of the H-bridge circuit, the second end of the automobile internal discharge opening is connected to the middle point of a second bridge arm of the H-bridge circuit, the first end of the first switch unit is connected with a first bus end of the H-bridge circuit and a second bus end of the H-bridge circuit respectively, the second end of the first switch unit is connected to a battery, and the first inductor is arranged between the automobile internal discharge opening and the H-bridge circuit. This openly can realize the function of discharging in the car through the H bridge circuit of multiplexing vehicle itself, can satisfy the discharging user demand in the car, reduces the battery and carries out the cost of discharging in the car, is convenient for use the interior equipment of car on the vehicle.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic diagram illustrating a discharge circuit in accordance with an exemplary embodiment.
FIG. 2 is a schematic diagram illustrating another discharge circuit in accordance with an exemplary embodiment.
FIG. 3 is a schematic diagram of a charging and discharging system according to an exemplary embodiment.
Fig. 4 is a schematic diagram illustrating another charge and discharge system according to an exemplary embodiment.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a block diagram illustrating a charging and discharging system according to an exemplary embodiment. As shown in fig. 1, applied to a vehicle, the discharge circuit 1 includes: an H-bridge circuit 11.
And a first end of the in-vehicle discharge port 12 is connected to a midpoint of a first arm of the H-bridge circuit 11, and a second end of the in-vehicle discharge port is connected to a midpoint of a second arm of the H-bridge circuit 11.
And a first switch unit 13, a first end of the first switch unit 13 being connected to the first bus terminal of the H-bridge circuit 11 and the second bus terminal of the H-bridge circuit 11, respectively, and a second end of the first switch unit 13 being connected to the battery 2.
And a first inductor L1 arranged between the in-vehicle discharge port 12 and the H-bridge circuit 11.
For example, currently, a vehicle-mounted charger for realizing a charging and discharging function on an electric vehicle, an electric control motor for driving the vehicle to run, and an air conditioner compressor for providing a comfortable environment for passengers in the vehicle are independent from each other on the whole vehicle. However, according to the actual operating conditions of the vehicle, the vehicle-mounted charger, the electric control motor and the air conditioner compressor work when there are differences, for example, when the vehicle is parked for charging, the vehicle-mounted charger needs to work, the electric control motor does not need to work, and the air conditioner compressor can work at half power. The device performance is wasted, the utilization rate of the whole vehicle resource is low, and the energy consumption of the vehicle is increased. Meanwhile, the mutually independent vehicle-mounted charger, the electric control motor and the air-conditioning compressor can increase the weight of the whole vehicle and the cost of the vehicle and reduce the available space in the vehicle. Therefore, when the charging and discharging functions of the vehicle are realized, the whole vehicle resources can be reused to the maximum extent by multiplexing partial topologies of the air compressor, the electric control motor and the vehicle-mounted charger under the condition of ensuring the normal original functions of the vehicle, the air compressor, the electric control motor and the vehicle-mounted charger are integrated, the device performance waste can be avoided, the device utilization rate is improved, all parts of the whole vehicle are integrated, the whole vehicle resource utilization rate is improved, the vehicle energy consumption and the vehicle cost are reduced, the arrangement volume of parts in the whole vehicle can be reduced, the usable space in the vehicle is improved, and meanwhile, the air compressor, the electric control motor and the structural shell of the vehicle-mounted charger are also integrated, so that the weight of the whole vehicle can be reduced.
Specifically, the discharge circuit 1 for realizing in-vehicle discharge may be constructed by the H-bridge circuit 11, the in-vehicle discharge port 12, the first switching unit 13, and the first inductor L1 that are already present on the vehicle. The first switch unit 13 may include a first switch K1 and a second switch K2, where the first switch K1 is connected between the first bus terminal of the H-bridge circuit 11 and the positive electrode of the battery 2, and the second switch K2 is connected between the first bus terminal of the H-bridge circuit 11 and the negative electrode of the battery 2. The first bridge arm of the H-bridge circuit 11 includes a first switching tube Q13 and a second switching tube Q14, and the second bridge arm of the H-bridge circuit 11 includes a third switching tube Q15 and a fourth switching tube Q16.
The user can send the in-vehicle charging instruction to the discharging circuit 1 according to the actual demand, so that the discharging circuit 1 enters the in-vehicle alternating current discharging mode according to the in-vehicle charging instruction, and controls the H-bridge circuit 11, the first switch unit 13 and the battery 2, so that the battery 2 performs alternating current discharging on the in-vehicle equipment through the in-vehicle discharging port 13. Specifically, when the battery voltage of the battery 2 can meet the power supply requirement of the in-vehicle device, the first switch K1 and the second switch K2 can be controlled to be switched on, the current at the positive terminal of the battery 2 sequentially flows into the negative terminal of the battery 2 through the first switch tube Q13, the first inductor L1, the in-vehicle discharging opening 12 and the fourth switch tube Q16, or the current at the positive terminal of the battery 2 sequentially flows into the negative terminal of the battery 2 through the third switch tube Q15, the in-vehicle discharging opening 12, the first inductor L1 and the second switch tube Q14.
The in-vehicle discharge port 13 may be a dual-hole socket or a USB (Universal Serial Bus) interface, and the in-vehicle device may be an ac device such as a notebook computer and an electric cooker. The charge and discharge instruction may be an instruction issued by a user through a preset operation at a terminal (or an in-vehicle host) connected to the vehicle. The vehicle may be any new energy vehicle using a battery as an energy source, and the vehicle may be an electric vehicle, not limited to a pure electric vehicle or a hybrid vehicle, but also an electric train, an electric bicycle, or the like. The terminal may be, for example, a terminal device such as a smart phone, a tablet computer, a smart watch, a smart bracelet, and a PDA (Personal Digital Assistant).
In one scenario, as shown in fig. 2, the discharging circuit 1 may further include a boost module 15 disposed between the first switch unit 13 and the battery 2, and the boost module 15 includes a full-bridge switch 151, a second inductor L2, a third inductor L3, and a boost capacitor C1.
A first terminal of the full-bridge switch 151 is connected to a first bus terminal of the H-bridge circuit 11, and a second terminal of the full-bridge switch 151 is connected to a second bus terminal of the H-bridge circuit 11.
The midpoint of the second arm of the full-bridge switch 151 is connected to the positive terminal of the battery 2 through a second inductor L2, and the midpoint of the first arm of the full-bridge switch 151 is connected to the negative terminal of the battery 2 through a third inductor L3.
The first end of the boost capacitor C1 is connected to the second inductor L2 and the third inductor L3, and the second end of the boost capacitor C1 is connected to the negative terminal of the battery 2.
For example, the H-bridge circuit 11 may be an H-bridge circuit of a charging DC module of an on-board charger on the vehicle, and the boost module 15 may be a boost DC module of a motor driving circuit on the vehicle.
Further, when the battery voltage of the battery 2 is small, it may be difficult to meet the power supply requirement of the in-vehicle device, and in order to ensure the normal use of the in-vehicle discharging function, the boost module 15 may boost the direct current output by the battery 2, and convert the boosted direct current into the alternating current required by the in-vehicle device through the H-bridge circuit 11. Specifically, the discharge circuit may further include a controller 16, and the controller 16 is connected with the boost module 15 and the H-bridge circuit 11. The controller 16 is configured to, under a condition that the battery voltage of the battery 2 is smaller than a preset voltage threshold (at this time, the battery voltage of the battery 2 cannot meet a power supply requirement of the in-vehicle device, and the boost module 15 needs to be used to boost the direct current output by the battery 2), control the boost module 15 and the H-bridge circuit 11 to operate, so that the battery 2 performs alternating current discharge through the in-vehicle discharging port 12. And the controller 16 is configured to control the H-bridge circuit 11 to operate so as to enable the battery 2 to perform ac discharge through the in-vehicle discharge opening when the battery voltage of the battery 2 is greater than or equal to the preset voltage threshold (at this time, the battery voltage of the battery 2 can meet the power supply requirement of the in-vehicle device, and the boost module 15 is not needed to boost the dc power output by the battery 2). Wherein, the preset voltage threshold may be 311V or 155V.
In summary, the discharge circuit in the present disclosure includes: the first end of the first switch unit is connected with a first junction end of the H bridge circuit and a second junction end of the H bridge circuit respectively, the second end of the first switch unit is connected to a battery, and the first inductor is arranged between the discharging port and the H bridge circuit in the vehicle. This openly can realize the discharge function in the car through the H bridge circuit of multiplexing vehicle itself, can satisfy the interior discharge user demand of car, reduce the battery and carry out the interior discharge cost of car, be convenient for use equipment in the car on the vehicle.
FIG. 3 is a schematic diagram of a charging and discharging system according to an exemplary embodiment. As shown in fig. 3, the charge/discharge system 3 includes an ac charging port 31, a first inverter 32, a second inverter 33, and the discharge circuit 1 shown in fig. 1 or 2.
A first end of ac charging port 31 is connected to the arm midpoint of first inverter 32, and a second end of ac charging port 31 is connected to the arm midpoint of second inverter 33.
A first bus end of the first inverter 32 is connected to a first bus end of the second inverter 33, and a second bus end of the first inverter 32 is connected to a second bus end of the second inverter 33, wherein the first inverter 32 is an inverter of a motor, and the second inverter 33 is an inverter of an air conditioner compressor.
The first bus terminal of the H-bridge circuit 11 is connected to the first bus terminal of the first inverter 32 and the first bus terminal of the second inverter 33.
The second bus terminal of the H-bridge circuit 11 is connected to the second bus terminal of the first inverter 32 and the second bus terminal of the second inverter 33.
And, the motor also includes the first automatically controlled coil 34, and the air condition compressor also includes the second automatically controlled coil 35.
A first electronically controlled coil 34 is connected at the leg midpoint of the first inverter 32 and a second electronically controlled coil 35 is connected at the leg midpoint of the second inverter 33.
The current at the first end of ac charging port 31 flows out through first electronically controlled coil 34 and flows into the second end of ac charging port 31 through second electronically controlled coil 35.
Further, the system 3 further includes a fourth inductor 36, and the fourth inductor 36 is disposed between the ac charging port 31 and the first inverter 32.
By controlling the on/off of the switching tube in the first inverter 32 and the switching tube in the second inverter 33, the current at the first end of the ac charging port 31 flows out through the fourth inductor 36 and the switching tube of the first inverter 32, and flows into the second end of the ac charging port 31 through the switching tube of the second inverter 33.
In addition, the charge-discharge system 3 further includes a transformer 37, and the transformer 37 is provided between the H-bridge circuit 11 and the booster module 15.
The midpoint of the first leg of the H-bridge circuit 11 is connected to a first end of the primary side of the transformer 37, and the midpoint of the second leg of the H-bridge circuit 11 is connected to a second end of the primary side of the transformer 37.
The midpoint of the first leg of full-bridge switch 151 is connected to the second end of the secondary side of transformer 37, and the midpoint of the second leg of full-bridge switch 151 is connected to the first end of the secondary side of transformer 37.
For example, as shown in fig. 3, the first electrically controlled coil 34 may include coil windings L1, L2, and L3, the first inverter 32 may include switching tubes Q1, Q2, Q3, Q4, Q5, and Q6, the second electrically controlled coil 35 may include coil windings L4, L5, and L6, and the second inverter 33 may include switching tubes Q7, Q8, Q9, Q10, Q11, and Q12. The charging and discharging system 3 is constructed, in fact, by preserving the H-bridge circuit 11, the step-up module 15 and the transformer 37 of the main circuit topology of the on-board charger, and multiplexing the first inverter 32 and the first electronically controlled coil 34 of the electric machine and the second inverter 33 and the second electronically controlled coil 35 of the air-conditioning compressor, while connecting the secondary side of the transformer 37 to the battery 2 through the step-up module 15. Through such a mode, can be under the original charge-discharge function normal circumstances of assurance vehicle, the multiplexing whole car resource of maximize, to empty voltage compressor, automatically controlled motor and on-vehicle machine that charges integrate, can avoid extravagant device performance, make whole car utilization of resources rationalize, vehicle energy consumption and vehicle cost have been reduced, and can reduce spare part and arrange the volume in whole car, promote the inside usable space of vehicle, air condition compressor, automatically controlled motor and the structure shell of on-vehicle machine that charges also can be integrated simultaneously, can reduce whole car weight.
Upon detecting insertion of the ac charging port 31 into the ac charging gun, the charging and discharging system 3 may enter the ac charging mode and control the first inverter 32, the second inverter 33, the first electric control coil 34, and the second electric control coil 35 to charge the battery 2 through the ac charging port 31. Alternatively, the user may send an ac discharge command to the charge and discharge system 3 according to actual needs, so that the charge and discharge system 3 enters the vehicle exterior ac discharge mode according to the ac discharge command, and controls the first inverter 32, the second inverter 33, the first electronic control coil 34, the second electronic control coil 35, and the battery 2, so that the battery 2 may perform vehicle exterior ac discharge through the ac charging port 31 (for example, ac 220V discharge to the outside of the vehicle).
The first inverter 32, the second inverter 33, the first electric control coil 34 and the second electric control coil 35 are used for constituting a PFC circuit in different operation modes of the charging and discharging system 3, so that the battery 2 is charged and discharged through the ac charging port 31 by single-phase ac.
Specifically, when the charge and discharge system 3 is in the ac charging mode, the PFC circuit may be configured by selecting the air-conditioning compressor (the second inverter 33 and the second electronically controlled coil 35) as a high-frequency arm of the PFC circuit and selecting the motor (the first inverter 32 and the first electronically controlled coil 34) as a line-frequency arm. The charging pile provides single-phase alternating current for the charging and discharging system, the single-phase alternating current is input into the charging and discharging system 3 through the alternating current charging port 31, a PFC loop formed by the air conditioner compressor and the motor can rectify the input single-phase alternating current into direct current, then the direct current is transmitted to the discharging circuit 1 to be boosted or reduced in voltage, the direct current obtained through boosting or reducing in voltage is used for charging the battery 2, and the alternating current charging function of the battery 2 is achieved.
When the charging and discharging system 3 is in the vehicle-exterior alternating current discharging mode, the battery 2 can output direct current to the discharging circuit 1, the discharging circuit 1 boosts or reduces the voltage of the direct current output by the battery 2, the boosted or reduced direct current is inverted into alternating current through the PFC loop, and alternating current discharging is performed on the external equipment through the alternating current charging port 31, so that the alternating current discharging function of the external equipment is realized.
Fig. 4 is a schematic view showing another charge and discharge system according to an exemplary embodiment. As shown in fig. 4, the charging and discharging system 3 further includes a dc charging port 38, and the dc charging port 39 includes a dc positive port 391 and a dc negative port 392.
The direct-current positive electrode port 391 is connected with the middle point of a bridge arm of the first inverter;
the dc negative port 392 is connected to the midpoint of the leg of the second inverter.
For example, the charging and discharging system 3 further has a dc charging function. When detecting that the dc charging port 38 is inserted into the dc charging gun, the charging and discharging system 3 can enter a dc charging mode, the charging pile can provide dc power for the charging and discharging system 3, and the first inverter 32, the first electric control coil 34 and the voltage boosting module 15 can boost the dc power input by the dc charging port 38 to provide dc power for the battery 2, thereby realizing the dc charging function of the battery 2.
In summary, the charging and discharging system in the present disclosure includes an air conditioner compressor, an electric control motor, a voltage conversion circuit, a battery, and an in-vehicle discharging port, where the electric control motor and the air conditioner compressor are connected to an external interface for forming different loops in different operating modes of the charging and discharging system, the voltage conversion circuit is connected to the electric control motor and the air conditioner compressor for performing voltage conversion in a charging and discharging process, the in-vehicle discharging port is connected to the voltage conversion circuit for connecting an in-vehicle device, and the battery is connected to the voltage conversion circuit for performing charging and discharging through the external interface in different operating modes, or for discharging to the in-vehicle device through the voltage conversion circuit and the in-vehicle discharging port. This openly can realize the outer charge-discharge function of car through air condition compressor, the automatically controlled motor of multiplexing vehicle itself to discharge function in the car is realized to voltage conversion circuit through multiplexing vehicle itself, can reduce the cost that the battery carries out outer charge-discharge, can satisfy the user demand of discharging in the car simultaneously, be convenient for use equipment in the car on the vehicle.
The present disclosure also provides a vehicle provided with a motor and an air-conditioning compressor and any one of the charge and discharge systems 3 shown in fig. 1 to 4, wherein a first inverter in the charge and discharge system 3 is an inverter of the motor, and a second inverter in the charge and discharge system 3 is an inverter of the air-conditioning compressor.
With regard to the vehicle in the above-described embodiment, the specific manner in which the charge and discharge system 3 performs the operation has been described in detail in the embodiment related to the system, and will not be elaborated here.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the above embodiments, the various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations will not be further described in the present disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (12)
1. A discharge circuit, for application to a vehicle, the discharge circuit comprising:
an H-bridge circuit;
a first end of the in-vehicle discharging port is connected to the midpoint of the first bridge arm of the H-bridge circuit, and a second end of the in-vehicle discharging port is connected to the midpoint of the second bridge arm of the H-bridge circuit;
a first switch unit, a first end of which is connected to a first bus end of the H-bridge circuit and a second bus end of the H-bridge circuit, respectively, and a second end of which is connected to a battery;
and the first inductor is arranged between the discharge port in the vehicle and the H-bridge circuit.
2. The discharge circuit of claim 1, wherein the first switching unit comprises a first switch and a second switch, the first switch being connected between the first sink of the H-bridge circuit and the positive pole of the battery, the second switch being connected between the first sink of the H-bridge circuit and the negative pole of the battery.
3. The discharge circuit of claim 2, wherein the first leg of the H-bridge circuit comprises a first switching tube and a second switching tube, and the second leg of the H-bridge circuit comprises a third switching tube and a fourth switching tube;
controlling the first switch and the second switch to be conducted, wherein the current of the positive terminal of the battery flows into the negative terminal of the battery through the first switch tube, the first inductor, the in-vehicle discharging opening and the fourth switch tube in sequence; or the current at the positive terminal of the battery flows into the negative terminal of the battery through the third switch tube, the in-vehicle discharging opening, the first inductor and the second switch tube in sequence.
4. The discharge circuit of claim 1, further comprising a boost module disposed between the first switching unit and the battery, the boost module comprising a full bridge switch, a second inductor, a third inductor, and a boost capacitor;
the first end of the full-bridge switch is connected with the first confluence end of the H-bridge circuit, and the second end of the full-bridge switch is connected with the second confluence end of the H-bridge circuit;
the midpoint of the second bridge arm of the full-bridge switch is connected with the positive pole end of the battery through the second inductor, and the midpoint of the first bridge arm of the full-bridge switch is connected with the negative pole end of the battery through the third inductor;
and the first end of the boost capacitor is connected with the second inductor and the third inductor, and the second end of the boost capacitor is connected with the negative electrode end of the battery.
5. The discharging circuit of claim 4, wherein the H-bridge circuit is an H-bridge circuit of a charging DC module of a vehicle-mounted charger, and the boost module is a boost DC module of a motor driving circuit.
6. The discharge circuit of claim 4 or 5, further comprising a controller;
the controller is used for controlling the boosting module and the H-bridge circuit to work under the condition that the battery voltage of the battery is smaller than a preset voltage threshold value, so that the battery carries out alternating current discharge through a discharge opening in the vehicle;
and the controller is used for controlling the H-bridge circuit to work under the condition that the battery voltage of the battery is greater than or equal to the preset voltage threshold value, so that the battery can perform alternating current discharge through the discharge port in the vehicle.
7. A charging and discharging system comprising an ac charging port, a first inverter and a second inverter, and a discharging circuit according to any one of claims 1 to 6;
the first end of the alternating current charging port is connected to the middle point of the bridge arm of the first inverter, and the second end of the alternating current charging port is connected to the middle point of the bridge arm of the second inverter;
a first bus end of the first inverter is connected with a first bus end of the second inverter, a second bus end of the first inverter is connected with a middle point of a bridge arm of the second inverter, the first inverter is an inverter of a motor, and the second inverter is an inverter of an air conditioner compressor;
a first bus end of the H-bridge circuit is connected with a first bus end of the first inverter and a first bus end of the second inverter;
and a second bus end of the H-bridge circuit is connected with a second bus end of the first inverter and a bridge arm midpoint of the second inverter.
8. The system of claim 7, wherein the motor further comprises a first electronically controlled coil, and the air conditioning compressor further comprises a second electronically controlled coil;
the first electric control coil is connected to the middle point of a bridge arm of the first inverter, and the second electric control coil is connected to the middle point of a bridge arm of the second inverter;
the current of the first end of the alternating current charging port flows out through the first electric control coil and flows into the second end of the alternating current charging port through the second electric control coil.
9. The system of claim 7, further comprising a fourth inductor; the fourth inductor is arranged between the alternating current charging port and the first inverter;
by controlling the on-off of the switching tube in the first inverter and the switching tube in the second inverter, the current at the first end of the alternating current charging port flows out through the fourth inductor and the switching tube of the first inverter, and flows into the second end of the alternating current charging port through the switching tube of the second inverter.
10. The system of claim 7, wherein the charging and discharging system further comprises a dc charging port comprising a dc positive port and a dc negative port;
the direct-current positive pole port is connected with the middle point of a bridge arm of the first inverter;
and the direct current negative pole port is connected with the middle point of a bridge arm of the second inverter.
11. The system of claim 7, wherein the charging and discharging system further comprises a transformer disposed between the H-bridge circuit and the boost module;
the middle point of a first bridge arm of the H-bridge circuit is connected with a first end of the primary side of the transformer, and the middle point of a second bridge arm of the H-bridge circuit is connected with a second end of the primary side of the transformer;
the midpoint of the first bridge arm of the full-bridge switch is connected with the second end of the secondary side of the transformer, and the midpoint of the second bridge arm of the full-bridge switch is connected with the first end of the secondary side of the transformer.
12. A vehicle, characterized in that a motor and an air-conditioning compressor are arranged on the vehicle, and the charging and discharging system of any one of claims 7 to 11, wherein a first inverter in the charging and discharging system is an inverter of the motor, and a second inverter in the charging and discharging system is an inverter of the air-conditioning compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222333666.1U CN217994349U (en) | 2022-08-31 | 2022-08-31 | Discharge circuit, charge-discharge system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222333666.1U CN217994349U (en) | 2022-08-31 | 2022-08-31 | Discharge circuit, charge-discharge system and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN217994349U true CN217994349U (en) | 2022-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222333666.1U Active CN217994349U (en) | 2022-08-31 | 2022-08-31 | Discharge circuit, charge-discharge system and vehicle |
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| Country | Link |
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| CN (1) | CN217994349U (en) |
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