Hybrid system, charging and discharging system, and vehicle

Abstract

The present invention discloses a hybrid system, a charging and discharging system, and a vehicle, relating to the field of electric vehicle technology and aiming to improve integration and further reduce costs. The hybrid system includes a drive control circuit and a power generation control circuit; a first terminal of the power generation control circuit is electrically connected to a first terminal of the drive control circuit; a second terminal of the power generation control circuit is electrically connected to a second terminal of the drive control circuit; and a third terminal of the power generation control circuit is connected to a battery pack. The power generation control circuit is used to power the drive control circuit and / or, in conjunction with the battery pack, to boost the voltage of the drive control circuit.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and in particular to a hybrid system, a charging and discharging system, and a vehicle. Background Art

[0002] With the development of the new energy vehicle industry and the need to enhance the competitiveness of auto brands, hybrid vehicles are facing increasingly higher performance requirements: greater torque, higher power, and so on. However, hybrid vehicles typically have smaller battery packs with lower voltages. When vehicles have higher performance requirements, the battery pack voltage needs to be boosted before being supplied to the drive motor module.

[0003] In existing hybrid systems, the boost function and the power generation function work independently. When both functions are required, they will occupy a large space in the hybrid system, which cannot meet the vehicle's requirements for highly integrated and extremely lightweight hybrid systems. At the same time, the independent boost function will also lead to a further increase in vehicle costs. Summary of the Invention

[0004] The object of the present invention is to provide a hybrid system, a charging and discharging system, and a vehicle, aiming to improve integration and further reduce costs.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present invention provides a hybrid system, which includes: a drive control circuit and a power generation control circuit; a first end of the power generation control circuit is electrically connected to a first end of the drive control circuit; a second end of the power generation control circuit is electrically connected to a second end of the drive control circuit; a third end of the power generation control circuit is used to connect to a battery pack; the power generation control circuit is used to power the drive control circuit, and / or, is also used together with the battery pack to boost power for the drive control circuit.

[0007] Based on the above solution, some embodiments of the present application provide a hybrid system that reuses the power generation control circuit to boost the power supply for the drive control circuit. By changing the connection between the power generation control circuit and the drive control circuit, replacing the independent boost module, the weight of the hybrid system can be reduced and the integration level of the hybrid system can be further improved. Furthermore, unlike the independent boost function module in the prior art, the reuse of the power generation control circuit can significantly reduce the cost of electronic control materials and production.

[0008] In some embodiments, when the bus voltage of the drive control circuit is greater than the voltage of the battery pack, the power generation control circuit and the battery pack together provide boosted power to the drive control circuit.

[0009] In some embodiments, when the bus voltage of the drive control circuit is greater than the voltage of the battery pack and the power of the drive control circuit is greater than the power of the battery pack, the power generation control circuit is used to power the drive control circuit and together with the battery pack boost the power supply for the drive control circuit.

[0010] In some embodiments, when the energy stored in the battery pack is less than a set threshold, the power generation control circuit is used to supply power to the drive control circuit.

[0011] In some embodiments, the drive control circuit includes: multiple first bridge arms; the first ends of the multiple first bridge arms are electrically connected to the first end of the drive control circuit, and the second ends of the multiple first bridge arms are electrically connected to the second end of the drive control circuit.

[0012] In some embodiments, the first bridge arm includes a first power device and a second power device; the first end of the first power device serves as the first end of the first bridge arm, the second end of the first power device is connected to the first end of the second power device, and the second end of the second power device serves as the second end of the first bridge arm; the connection endpoint of the first power device and the second power device serves as the third end of the first bridge arm.

[0013] In some embodiments, the drive control circuit further includes: a first motor; the first motor includes: multiple input terminals; the multiple input terminals of the first motor are respectively connected to the third terminals of the multiple first bridge arms in a one-to-one correspondence.

[0014] In some embodiments, the power generation control circuit includes: multiple second bridge arms; the first ends of the multiple second bridge arms are electrically connected to the first end of the power generation control circuit, and the second ends of the multiple second bridge arms are electrically connected to the second end of the power generation control circuit.

[0015] In some embodiments, the second bridge arm includes: a third power device and a fourth power device; the first end of the third power device serves as the first end of the second bridge arm, the second end of the third power device is connected to the first end of the fourth power device, and the second end of the fourth power device serves as the second end of the second bridge arm; the connection endpoint of the third power device and the fourth power device serves as the third end of the second bridge arm.

[0016] In some embodiments, the power generation control circuit further includes: a second motor; the second motor includes: multiple input terminals; the multiple input terminals of the second motor are respectively connected to the third terminals of the multiple second bridge arms in a one-to-one correspondence.

[0017] In some embodiments, the hybrid system further includes: a first capacitor and a first resistor; the first end of the first capacitor is electrically connected to the first end of the drive control circuit, and the second end of the first capacitor is electrically connected to the second end of the drive control circuit; the first end of the first resistor is electrically connected to the first end of the first capacitor, and the second end of the first resistor is electrically connected to the second end of the first capacitor.

[0018] In some embodiments, the hybrid system also includes: a second capacitor and a second resistor; the first end of the second capacitor is electrically connected to the third end of the power generation control circuit, and the second end of the second capacitor is electrically connected to the second end of the power generation control circuit; the first end of the second resistor is electrically connected to the first end of the second capacitor, and the second end of the second resistor is electrically connected to the second end of the second capacitor.

[0019] In a second aspect, the present application provides a charging and discharging system, comprising a hybrid system and a battery pack as provided in any of the above embodiments.

[0020] Among them, the beneficial effects of the second aspect and its possible embodiments can refer to the first aspect and will not be repeated here.

[0021] In some embodiments, the charging and discharging system also includes: a first switch and a second switch; the first end of the first switch is electrically connected to the positive pole of the battery pack, and the second end of the first switch is electrically connected to the third end of the power generation control circuit; the first end of the second switch is electrically connected to the negative pole of the battery pack, and the second end of the second switch is electrically connected to the second end of the power generation control circuit.

[0022] In some embodiments, the charging and discharging system further includes: a charging port; a first end of the charging port is electrically connected to the second end of the first switch, and the second end of the charging port is electrically connected to the first end of the second switch.

[0023] In some embodiments, the charging and discharging system also includes: a third switch; the first end of the third switch is electrically connected to the positive pole of the battery pack, and the second end of the third switch is electrically connected to the first end of the power generation control circuit; when the bus voltage of the drive control circuit is less than or equal to the voltage of the battery pack, the third switch is closed, and the battery pack is used to power the drive control circuit.

[0024] In some embodiments, when the bus voltage of the drive control circuit is less than or equal to the voltage of the battery pack and the power of the drive control circuit is greater than the power of the power generation control circuit, the third switch is closed, and the power generation control circuit and the battery pack are both used to power the drive control circuit.

[0025] In some embodiments, the charge and discharge system further includes: a pre-charging circuit; a first end of the pre-charging circuit is electrically connected to the first end of the first switch, and a second end of the pre-charging circuit is electrically connected to the second end of the first switch.

[0026] In some embodiments, the pre-charging circuit includes: a third resistor and a fourth switch; the first end of the third resistor is electrically connected to the second end of the fourth switch, the second end of the third resistor is the second end of the pre-charging circuit, and the first end of the fourth switch is the first end of the pre-charging circuit.

[0027] In some embodiments, the battery pack includes: a first battery cell and a second battery cell; the first battery cell and the second battery cell are connected in series; the positive electrode of the first battery cell is electrically connected to the first end of the third switch, and the negative electrode of the first battery cell is electrically connected to the first end of the first switch; the first end of the second battery cell is electrically connected to the negative electrode of the first battery cell, and the second end of the second battery cell is electrically connected to the first end of the second switch.

[0028] In some embodiments, the charging and discharging system further includes: a fifth switch; a first end of the fifth switch is electrically connected to the first end of the charging port, and a second end of the fifth switch is electrically connected to the second end of the third switch.

[0029] In some embodiments, the charging and discharging system further includes: a sixth switch and a seventh switch; the first end of the sixth switch is electrically connected to the first end of the charging port, and the second end of the sixth switch is electrically connected to the second end of the first switch; the first end of the seventh switch is electrically connected to the second end of the charging port, and the second end of the seventh switch is electrically connected to the first end of the second switch.

[0030] In a third aspect, the present application provides a vehicle comprising the hybrid system provided by any of the above embodiments; and / or the charging and discharging system provided by any of the embodiments.

[0031] Among them, the beneficial effects of the third aspect and its possible embodiments can refer to the first aspect and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] Figure 1 is a schematic diagram of an existing hybrid system;

[0034] Figure 2 A schematic diagram of a hybrid system provided in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of another hybrid system provided in an embodiment of the present application;

[0036] Figure 4 A schematic diagram of another hybrid system provided in an embodiment of the present application;

[0037] Figure 5 A schematic diagram of another hybrid system provided in an embodiment of the present application;

[0038] Figure 6A schematic diagram of another hybrid system provided in an embodiment of the present application;

[0039] Figure 7 A schematic diagram of a charging and discharging system provided in an embodiment of the present application;

[0040] Figure 8 A schematic diagram of another charging and discharging system provided in an embodiment of the present application;

[0041] Figure 9 A schematic diagram of another charging and discharging system provided in an embodiment of the present application;

[0042] Figure 10 A schematic diagram of a battery pack provided in an embodiment of the present application;

[0043] Figure 11 A schematic diagram of a means of transportation provided in an embodiment of the present application.

[0044] Figure numerals: 1, drive control circuit; 11, first bridge arm; 2, power generation control circuit; 21, second bridge arm; MG1, first motor; MG2, second motor; M1, first power device; M2, second power device; M3, third power device; M4, fourth power device; K1, first switch; K2, second switch; K3, third switch; K4, fourth switch; K5, fifth switch; K6, sixth switch; K7, seventh switch; C1, first capacitor; C2, second capacitor; R1, first resistor; R2, second resistor; R3, third resistor; 100, hybrid system; 110, first battery cell; 120, second battery cell; 130, fuse; 140, pre-charging circuit; 150, battery pack; 200, charging and discharging system; 300, vehicle. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] In the description of the invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "back," "inner," "outer," and the like, indicating directions or positional relationships, are based on the directions or relative positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on the invention. Unless otherwise specified, the above-mentioned directions may be flexibly set in actual application, provided that the relative positional relationships shown in the accompanying drawings are met.

[0047] 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 quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0048] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "communicated" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections. They may be directly connected, indirectly connected through an intermediary, or internally connected between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0049] In embodiments of the present invention, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, article, or apparatus comprising the element.

[0050] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0051] With the development of the new energy vehicle industry and the need to enhance the competitiveness of auto brands, hybrid vehicles are facing increasingly higher performance requirements: greater torque, higher power, and so on. However, hybrid vehicles typically have smaller battery packs with lower voltages. When vehicles have higher performance requirements, the battery pack voltage needs to be boosted before being supplied to the drive motor module.

[0052] In existing hybrid systems, the boost function and the power generation function work independently. When both functions are required, they will occupy a large space in the hybrid system, which cannot meet the vehicle's requirements for highly integrated and extremely lightweight hybrid systems. At the same time, the independent boost function will also lead to a further increase in vehicle costs.

[0053] For example, refer to Figure 1 , Figure 1 An independent DC-DC buck-boost module is used to boost the battery pack voltage. This module includes a buck-boost control module and a power inductor (typically using H-bridge interleaved control to suppress ripple voltage). MGX1 is the drive motor, controlled by the drive control module. MGX2 is the generator, controlled by the generator control module. When the vehicle demands high torque / power, the prime mover (internal combustion engine) drives the generator to generate power for the drive motor, while the DC-DC buck-boost module boosts the battery pack voltage to power the drive motor. These two operating modes are independent of each other.

[0054] In addition, the independent DC-DC functional module increases the cost of components on the one hand, and on the other hand, the demand for a larger electronic control box increases the material cost, leading to an overall increase in the cost of the vehicle.

[0055] Based on this, the embodiment of the present application provides a hybrid system. Figure 2 As shown, the hybrid system 100 includes a drive control circuit 1 and a power generation control circuit 2 .

[0056] The first end of the power generation control circuit 2 is electrically connected to the first end of the drive control circuit 1; the second end of the power generation control circuit 2 is electrically connected to the second end of the drive control circuit 1; and the third end of the power generation control circuit 2 is used to connect to the battery pack 150.

[0057] The power generation control circuit 2 is used to supply power to the drive control circuit 1 , and / or is also used to work together with the battery pack 150 to boost the power supply to the drive control circuit 1 .

[0058] The function of the power generation control circuit 2 is to convert kinetic energy into electrical energy and then power the drive control circuit 1. There is an energy storage circuit in the power generation control circuit 2. When the voltage of the battery pack 150 is lower than the voltage of the drive control circuit 1, the battery pack 150 first connects to the energy storage circuit in the power generation control circuit 2 to power the energy storage circuit, and then the battery pack 150 and the energy storage circuit in the power generation control circuit 2 together power the drive control circuit 1.

[0059] Among them, the power generation control circuit 2 can only supply power to the drive control circuit 1, and the battery pack 150 does not supply power at this time; or, the power generation control circuit 2 does not generate power, and the battery pack 150 reuses the energy storage circuit in the power generation control circuit 2 for boosting power supply; or, the power generation control circuit 2 generates power, and the battery pack 150 reuses the energy storage circuit in the power generation control circuit 2 for boosting power supply.

[0060] In this way, compared with the prior art, there is no need to set up a separate boost module, and only the power generation control circuit 2 needs to be reused; at the same time, the integration of the hybrid system 100 is higher and the overall cost of the hybrid system 100 is reduced.

[0061] In some embodiments, the power generation control circuit 2 converts kinetic energy into electrical energy and can also charge the battery pack 150 .

[0062] Based on the above solution, some embodiments of the present application provide a hybrid system 100 that reuses the power generation control circuit 2 to boost the power supply for the drive control circuit 1. By changing the connection between the power generation control circuit 2 and the drive control circuit 1, replacing the independent boost module, the weight of the hybrid system 100 is reduced and the integration level of the hybrid system 100 is further improved. Furthermore, unlike the independent boost module in the prior art, the reuse of the power generation control circuit 2 significantly reduces the cost of electronic control materials and production.

[0063] like Figure 2 As shown, in some embodiments, the drive control circuit 1 includes: multiple first bridge arms 11; the first ends of the multiple first bridge arms 11 are electrically connected to the first end of the drive control circuit 1, and the second ends of the multiple first bridge arms 11 are electrically connected to the second end of the drive control circuit 1.

[0064] When the battery pack 150 or the power generation control circuit 2 supplies power to the drive control circuit 1 , corresponding bridge arms among the plurality of first bridge arms 11 are turned on.

[0065] The first bridge arm 11 includes a first power device M1 and a second power device M2 .

[0066] The first end of the first power device M1 serves as the first end of the first bridge arm 11, the second end of the first power device M1 is connected to the first end of the second power device M2, and the second end of the second power device M2 serves as the second end of the first bridge arm 11; the connection endpoint between the first power device M1 and the second power device M2 serves as the third end of the first bridge arm 11.

[0067] In some embodiments, the first power device M1 and the second power device M2 are transistors, that is, MOS transistors.

[0068] For example, when the battery pack 150 or the power generation control circuit 2 supplies power to the drive control circuit 1, the first power device M1 of one first bridge arm 11 is turned on and the second power device M2 is turned off; the first power devices M1 of the remaining first bridge arms 11 are turned off and the second power devices M2 are turned on; in this way, a power supply loop can be formed.

[0069] like Figure 2 As shown, in some embodiments, the drive control circuit 1 further includes: a first motor MG1.

[0070] The first motor MG1 includes: a plurality of input terminals; the plurality of input terminals of the first motor MG1 are respectively connected to the third terminals of the plurality of first bridge arms 11 in a one-to-one correspondence.

[0071] For example, when the battery pack 150 or the power generation control circuit 2 supplies power to the drive control circuit 1, the first power device M1 of one first bridge arm 11 is turned on and the second power device M2 is turned off; the first power devices M1 of the remaining first bridge arms 11 are turned off and the second power devices M2 are turned on; in this way, the current is transmitted to an input end of the motor through the first power device M1 of the first bridge arm 11, and then returns to the power generation control circuit 2 or the battery pack 150 through the remaining input ends and the second power devices M2 of the remaining first bridge arms 11, thereby forming a power supply loop.

[0072] The first motor MG1 is used to convert electrical energy into kinetic energy, and the first bridge arms 11 are used to convert direct current into alternating current, and power the motor via the alternating current.

[0073] Reference Figure 2 In some embodiments, the power generation control circuit 2 includes: multiple second bridge arms 21; the first ends of the multiple second bridge arms 21 are electrically connected to the first end of the power generation control circuit 2, and the second ends of the multiple second bridge arms 21 are electrically connected to the second end of the power generation control circuit 2.

[0074] When the battery pack 150 or the power generation control circuit 2 supplies power to the drive control circuit 1 , corresponding bridge arms among the plurality of second bridge arms 21 are turned on.

[0075] Reference Figure 2In some embodiments, the second bridge arm 21 includes: a third power device M3 and a fourth power device M4.

[0076] The first end of the third power device M3 serves as the first end of the second bridge arm 21, the second end of the third power device M3 is connected to the first end of the fourth power device M4, and the second end of the fourth power device M4 serves as the second end of the second bridge arm 21; the connection endpoint of the third power device M3 and the fourth power device M4 serves as the third end of the second bridge arm 21.

[0077] In some embodiments, the third power device M3 and the fourth power device M4 are transistors, that is, MOS transistors.

[0078] For example, when the battery pack 150 or the power generation control circuit 2 supplies power to the drive control circuit 1, the third power device M3 of a second bridge arm 21 is turned on, the first power device M1 of a first bridge arm 11 is turned on, and the second power device M2 is turned off; the first power device M1 of the remaining first bridge arms 11 is turned off, and the second power device M2 is turned on; the fourth power device M4 of another second bridge arm 21 is turned on, so that a power supply circuit can be formed.

[0079] Reference Figure 2 In some embodiments, the power generation control circuit 2 further includes: a second motor MG2; the second motor MG2 includes: multiple input terminals; the multiple input terminals of the second motor MG2 are respectively connected to the third terminals of the multiple second bridge arms 21 in a one-to-one correspondence.

[0080] For example, when the battery pack 150 or the power generation control circuit 2 supplies power to the drive control circuit 1, the third power device M3 of one second bridge arm 21 is turned on, and the fourth power device M4 of another second bridge arm 21 is turned on; the first power device M1 of one first bridge arm 11 is turned on, and the second power device M2 is turned off; the first power devices M1 of the remaining first bridge arms 11 are turned off, and the second power devices M2 are turned on; in this way, the current output by the second motor MG2 is transmitted to the first bridge arm 11 through the third power device M3 of the second bridge arm 21, and the first power device M1 of the first bridge arm 11 then transmits the current to one input end of the motor, and then returns to the second bridge arm 21 of the power generation control circuit 2 or the battery pack 150 through the remaining input ends and the second power devices M2 of the remaining first bridge arms 11, thereby forming a power supply loop.

[0081] Among them, the function of the second motor MG2 is to convert kinetic energy into electrical energy, and the function of the multiple second bridge arms 21 is to convert AC power into DC power, and transmit the DC power to the drive control circuit 1. The drive control circuit 1 then converts the DC power into AC power, thereby powering the first motor MG1.

[0082] like Figure 3As shown, in some embodiments, the hybrid system 100 further includes: a first capacitor C1 and a first resistor R1.

[0083] The first end of the first capacitor C1 is electrically connected to the first end of the drive control circuit 1, and the second end of the first capacitor C1 is electrically connected to the second end of the drive control circuit 1; the first end of the first resistor R1 is electrically connected to the first end of the first capacitor C1, and the second end of the first resistor R1 is electrically connected to the second end of the first capacitor C1.

[0084] like Figure 3 As shown, in some embodiments, the hybrid system 100 further includes: a second capacitor C2 and a second resistor R2.

[0085] The first end of the second capacitor C2 is electrically connected to the third end of the power generation control circuit 2, and the second end of the second capacitor C2 is electrically connected to the second end of the power generation control circuit 2; the first end of the second resistor R2 is electrically connected to the first end of the second capacitor C2, and the second end of the second resistor R2 is electrically connected to the second end of the second capacitor C2.

[0086] The first capacitor C1 and the second capacitor C2 serve to store energy. The first capacitor C1 mainly stores the electrical energy provided by the drive control circuit 1 , while the second capacitor C2 mainly stores the electrical energy provided by the battery pack 150 .

[0087] like Figure 4 As shown, in some embodiments, when the bus voltage of the drive control circuit 1 is greater than the voltage of the battery pack 150 , the power generation control circuit 2 and the battery pack 150 together provide boosted power for the drive control circuit 1 .

[0088] The bus voltage of the drive control circuit 1 can also be understood as the voltage required for the normal operation of the drive control circuit 1 .

[0089] Specifically, when the voltage of battery pack 150 is lower than the required voltage of first motor MG1 in drive control circuit 1, battery pack 150 boosts the low voltage via second motor MG2 in power generation control circuit 2, supplying power to drive control circuit 1 and meeting the voltage and power requirements of first motor MG1. During this time, second motor MG2 is not generating power, and power generation control circuit 2 reuses the windings of second motor MG2 as a power inductor to boost the voltage of battery pack 150.

[0090] like Figure 5 As shown, in some embodiments, when the bus voltage of the drive control circuit 1 is greater than the voltage of the battery pack 150, and the power of the drive control circuit 1 is greater than the power of the battery pack 150, the power generation control circuit 2 is used to power the drive control circuit 1, and together with the battery pack 150, boost the power supply for the drive control circuit 1.

[0091] For example, when the voltage of the battery pack 150 is lower than the required voltage of the first motor MG1 in the drive control circuit 1, and the output power of the battery pack 150 cannot meet the required power of the first motor MG1 in the drive control circuit 1, the battery pack 150 first boosts the voltage of the battery pack 150 by reusing the winding of the second motor MG2 as a power inductor, and then the kinetic energy is converted into circuit through the operation of the second motor MG2. The second bridge arm 21 in the power generation control circuit 2 controls the power generation voltage to supply power to the drive control circuit 1; thereby meeting the voltage and power requirements of the second motor MG2.

[0092] like Figure 6 As shown, in some embodiments, when the energy storage of the battery pack 150 is less than a set threshold, the power generation control circuit 2 is used to supply power to the drive control circuit 1 .

[0093] The set threshold is the minimum voltage required for normal operation of the battery pack 150. When the energy stored in the battery pack 150 is less than the set threshold, it means that the battery pack 150 can no longer meet the voltage required for normal operation of the first motor MG1. At this time, the second motor MG2 in the power generation control circuit 2 is required to generate power to supply the first motor MG1.

[0094] For example, when the vehicle has a power conservation requirement and the output power of the battery pack 150 can meet the power requirement of the drive control circuit 1, the second motor MG2 works to convert kinetic energy into electrical energy, and controls the power generation voltage through the second bridge arm 21 of the power generation control circuit 2 to supply power to the drive control circuit 1 to meet the voltage and power requirements of the drive control circuit 1.

[0095] like Figure 7 As shown, the present application also provides a charging and discharging system 200 , including: a hybrid system 100 and a battery pack 150 .

[0096] In some embodiments, the charge and discharge system 200 further includes a first switch K1 and a second switch K2 .

[0097] The first end of the first switch K1 is electrically connected to the positive pole of the battery pack 150, and the second end of the first switch K1 is electrically connected to the third end of the power generation control circuit 2; the first end of the second switch K2 is electrically connected to the negative pole of the battery pack 150, and the second end of the second switch K2 is electrically connected to the second end of the power generation control circuit 2.

[0098] For example, when the voltage of battery pack 150 is lower than the required voltage of first motor MG1 in drive control circuit 1, first switch K1 and second switch K2 are closed. Battery pack 150 boosts the low voltage via second motor MG2 in power generation control circuit 2, supplying power to drive control circuit 1 and meeting the voltage and power requirements of first motor MG1. During this time, second motor MG2 is not generating power, and power generation control circuit 2 reuses the windings of second motor MG2 as a power inductor to boost the voltage of battery pack 150.

[0099] When the voltage of the battery pack 150 is lower than the required voltage of the first motor MG1 in the drive control circuit 1, and the output power of the battery pack 150 cannot meet the required power of the first motor MG1 in the drive control circuit 1, the first switch K1 and the second switch K2 are closed. First, the battery pack 150 boosts the voltage of the battery pack 150 by reusing the winding of the second motor MG2 as a power inductor, and then the kinetic energy is converted into circuit through the operation of the second motor MG2. The second bridge arm 21 in the power generation control circuit 2 controls the power generation voltage to supply power to the drive control circuit 1; thereby meeting the voltage and power requirements of the second motor MG2.

[0100] like Figure 7 As shown, in some embodiments, the charge and discharge system 200 further includes: a fuse 130; a first end of the fuse 130 is electrically connected to the second end of the second switch K2, and a first end of the fuse 130 is electrically connected to the second end of the second resistor R2.

[0101] In some embodiments, the charging and discharging system 200 further includes: a charging port.

[0102] The first end of the charging port is electrically connected to the second end of the first switch K1 , and the second end of the charging port is electrically connected to the first end of the second switch K2 .

[0103] For example, the first switch K1 and the second switch K2 are closed, and current flows through the charging port to charge the battery pack 150 .

[0104] like Figure 7 and Figure 8 As shown, in some embodiments, the charge and discharge system 200 further includes: a third switch K3.

[0105] A first end of the third switch K3 is electrically connected to the positive electrode of the battery pack 150 , and a second end of the third switch K3 is electrically connected to the first end of the power generation control circuit 2 .

[0106] When the bus voltage of the drive control circuit 1 is less than or equal to the voltage of the battery pack 150 , the third switch K3 is closed, and the battery pack 150 is used to supply power to the drive control circuit 1 .

[0107] That is, the battery pack 150 can directly supply power to the driving control circuit 1 through the third switch K3 without passing through the power generation control circuit 2 .

[0108] like Figure 9 As shown, in some embodiments, when the bus voltage of the drive control circuit 1 is less than or equal to the voltage of the battery pack 150, and the power of the drive control circuit 1 is greater than the power of the power generation control circuit 2, the third switch K3 is closed, and the power generation control circuit 2 and the battery pack 150 are both used to power the drive control circuit 1.

[0109] Reference Figures 7 to 9 In some embodiments, the charge and discharge system 200 further includes: a pre-charging circuit 140 .

[0110] A first end of the pre-charging circuit 140 is electrically connected to a first end of the first switch K1 , and a second end of the pre-charging circuit 140 is electrically connected to a second end of the first switch K1 .

[0111] The pre-charging circuit 140 includes: a third resistor R3 and a fourth switch K4; the first end of the third resistor R3 is electrically connected to the second end of the fourth switch K4, the second end of the third resistor R3 is the second end of the pre-charging circuit 140, and the first end of the fourth switch K4 is the first end of the pre-charging circuit 140.

[0112] For example, before power is supplied, the fourth switch K4 is controlled to be turned on, and the pre-charging circuit 140 operates to store electrical energy in the second capacitor C2.

[0113] like Figure 10 As shown, in some embodiments, the battery pack 150 includes: a first battery cell 110 and a second battery cell 120 .

[0114] The first battery cell 110 and the second battery cell 120 are connected in series; the positive electrode of the first battery cell 110 is electrically connected to the first end of the third switch K3, and the negative electrode of the first battery cell 110 is electrically connected to the first end of the first switch K1; the first end of the second battery cell 120 is electrically connected to the negative electrode of the first battery cell 110, and the second end of the second battery cell 120 is electrically connected to the first end of the second switch K2.

[0115] The plurality of battery cells connected in series can realize self-heating of the battery pack 150 by switching the first switch K1 on and off.

[0116] In some embodiments, the charging and discharging system 200 further includes: a fifth switch K5 ; a first end of the fifth switch K5 is electrically connected to the first end of the charging port, and a second end of the fifth switch K5 is electrically connected to the second end of the third switch K3 .

[0117] In some embodiments, the charge and discharge system 200 further includes a sixth switch K6 and a seventh switch K7.

[0118] A first end of the sixth switch K6 is electrically connected to the first end of the charging port, and a second end of the sixth switch K6 is electrically connected to the second end of the first switch K1; a first end of the seventh switch K7 is electrically connected to the second end of the charging port, and a second end of the seventh switch K7 is electrically connected to the first end of the second switch K2.

[0119] The sixth switch K6 and the seventh switch K7 mainly control the on and off of the charging port.

[0120] like Figure 11 As shown, the present application further provides a vehicle 300 , comprising the hybrid system 100 provided by any of the above embodiments; and / or the charging and discharging system 200 provided by any of the embodiments.

[0121] For example, vehicle 300 is a new energy vehicle. During normal operation, if the voltage of battery pack 150 falls below the required voltage of first motor MG1 in drive control circuit 1, battery pack 150 boosts the low voltage of battery pack 150 via second motor MG2 in power generation control circuit 2, supplying power to drive control circuit 1 and meeting the voltage and power requirements of first motor MG1. During this period, second motor MG2 is not generating power, and power generation control circuit 2 reuses the windings of second motor MG2 as a power inductor to boost the voltage of battery pack 150.

[0122] When the voltage of the battery pack 150 is lower than the required voltage of the first motor MG1 in the drive control circuit 1, and the output power of the battery pack 150 cannot meet the required power of the first motor MG1 in the drive control circuit 1, the battery pack 150 first boosts the voltage of the battery pack 150 by reusing the winding of the second motor MG2 as a power inductor, and then the kinetic energy is converted into circuit through the operation of the second motor MG2. The second bridge arm 21 in the power generation control circuit 2 controls the power generation voltage to supply power to the drive control circuit 1; thereby meeting the voltage and power requirements of the second motor MG2.

[0123] When the new energy vehicle stops driving, or when the new energy vehicle has a power conservation need, and the output power of the battery pack 150 can meet the power requirement of the drive control circuit 1, the second motor MG2 works to convert kinetic energy into electrical energy, and controls the power generation voltage through the second bridge arm 21 of the power generation control circuit 2 to supply power to the drive control circuit 1 to meet the voltage and power requirements of the drive control circuit 1.

[0124] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0125] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A hybrid system (100), characterized in that: include: Drive control circuit (1); A power generation control circuit (2), wherein a first end of the power generation control circuit (2) is electrically connected to a first end of the drive control circuit (1); a second end of the power generation control circuit (2) is electrically connected to a second end of the drive control circuit (1); and a third end of the power generation control circuit (2) is used to connect to a battery pack (150); The power generation control circuit (2) comprises a second motor (MG2), the second motor (MG2) is used to generate electric energy, and the second motor (MG2) is also used to serve as a power inductor to provide boosted power supply; The power generation control circuit (2) is configured to boost the voltage of the drive control circuit (1) based on the second motor (MG2) and the battery pack (150) when the bus voltage of the drive control circuit (1) is greater than the voltage of the battery pack (150); a second capacitor (C2), wherein a first end of the second capacitor (C2) is electrically connected to a third end of the power generation control circuit (2), and a second end of the second capacitor (C2) is electrically connected to a second end of the power generation control circuit (2); A second resistor (R2), wherein a first end of the second resistor is electrically connected to a first end of the second capacitor (C2), and a second end of the second resistor (R2) is electrically connected to a second end of the second capacitor (C2).

2. The hybrid system (100) according to claim 1, characterized in that In the case where the bus voltage of the drive control circuit (1) is greater than the voltage of the battery pack (150), and the power of the drive control circuit (1) is greater than the power of the battery pack (150), The power generation control circuit (2) is used to supply power to the drive control circuit (1), and together with the battery pack (150) provides boosted power to the drive control circuit (1).

3. The hybrid system (100) according to claim 1, characterized in that When the energy stored in the battery pack (150) is less than a set threshold, the power generation control circuit (2) is used to supply power to the drive control circuit (1).

4. The hybrid system (100) according to any one of claims 1 to 3, characterized in that: The driving control circuit (1) comprises: a plurality of first bridge arms (11); The first ends of the plurality of first bridge arms (11) are electrically connected to the first end of the drive control circuit (1), and the second ends of the plurality of first bridge arms (11) are electrically connected to the second end of the drive control circuit (1).

5. The hybrid system (100) according to claim 4, characterized in that: The first bridge arm (11) comprises a first power device (M1) and a second power device (M2); The first end of the first power device (M1) serves as the first end of the first bridge arm (11), the second end of the first power device (M1) is connected to the first end of the second power device (M2), and the second end of the second power device (M2) serves as the second end of the first bridge arm (11); The connection endpoint of the first power device (M1) and the second power device (M2) serves as the third end of the first bridge arm (11).

6. The hybrid system (100) according to claim 5, characterized in that The drive control circuit (1) further includes: a first motor (MG1); the first motor (MG1) includes: a plurality of input terminals; The plurality of input ends of the first motor (MG1) are respectively connected to the third ends of the plurality of first bridge arms (11) in a one-to-one correspondence.

7. The hybrid system (100) according to any one of claims 1 to 3, characterized in that: The power generation control circuit (2) comprises: a plurality of second bridge arms (21); The first ends of the plurality of second bridge arms (21) are electrically connected to the first end of the power generation control circuit (2), and the second ends of the plurality of second bridge arms (21) are electrically connected to the second end of the power generation control circuit (2).

8. The hybrid system (100) according to claim 7, characterized in that The second bridge arm (21) comprises: a third power device (M3) and a fourth power device (M4); The first end of the third power device (M3) serves as the first end of the second bridge arm (21), the second end of the third power device (M3) is connected to the first end of the fourth power device (M4), and the second end of the fourth power device (M4) serves as the second end of the second bridge arm (21); The connection endpoint of the third power device (M3) and the fourth power device (M4) serves as the third end of the second bridge arm (21).

9. The hybrid system (100) according to claim 8, characterized in that The second motor (MG2) includes: a plurality of input terminals; The plurality of input ends of the second motor (MG2) are respectively connected to the third ends of the plurality of second bridge arms (21) in a one-to-one correspondence.

10. The hybrid system (100) according to claim 1, characterized in that The hybrid system (100) further includes: a first capacitor (C1) and a first resistor (R1); A first end of the first capacitor (C1) is electrically connected to a first end of the drive control circuit (1), and a second end of the first capacitor (C1) is electrically connected to a second end of the drive control circuit (1); The first end of the first resistor (R1) is electrically connected to the first end of the first capacitor (C1), and the second end of the first resistor (R1) is electrically connected to the second end of the first capacitor (C1).

11. A charging and discharging system (200), characterized in that: The charging and discharging system (200) comprises: Battery Pack (150); A hybrid system (100) according to any one of claims 1 to 10, connected to the battery pack (150).

12. The charging and discharging system (200) according to claim 11, characterized in that: The charging and discharging system (200) further includes: a first switch (K1) and a second switch (K2); The first end of the first switch (K1) is electrically connected to the positive electrode of the battery pack (150), and the second end of the first switch (K1) is electrically connected to the third end of the power generation control circuit (2); The first end of the second switch (K2) is electrically connected to the negative electrode of the battery pack (150), and the second end of the second switch (K2) is electrically connected to the second end of the power generation control circuit (2).

13. The charging and discharging system (200) according to claim 12, characterized in that: The charging and discharging system (200) further includes: a charging port; The first end of the charging port is electrically connected to the second end of the first switch (K1), and the second end of the charging port is electrically connected to the first end of the second switch (K2).

14. The charging and discharging system (200) according to claim 13, characterized in that: The charging and discharging system (200) further includes: a third switch (K3); A first end of the third switch (K3) is electrically connected to the positive electrode of the battery pack (150), and a second end of the third switch (K3) is electrically connected to the first end of the power generation control circuit (2); When the bus voltage of the drive control circuit (1) is less than or equal to the voltage of the battery pack (150), the third switch (K3) is closed, and the battery pack (150) is used to supply power to the drive control circuit (1).

15. The charging and discharging system (200) according to claim 14, characterized in that: When the bus voltage of the drive control circuit (1) is less than or equal to the voltage of the battery pack (150), and the power of the drive control circuit (1) is greater than the power of the power generation control circuit (2), The third switch (K3) is closed, and the power generation control circuit (2) and the battery pack (150) are both used to supply power to the drive control circuit (1).

16. The charging and discharging system (200) according to claim 12, characterized in that: The charging and discharging system (200) further includes: a pre-charging circuit; The first end of the pre-charging circuit is electrically connected to the first end of the first switch (K1), and the second end of the pre-charging circuit is electrically connected to the second end of the first switch (K1).

17. The charging and discharging system (200) according to claim 16, characterized in that: The pre-charging circuit includes: a third resistor (R3) and a fourth switch (K4); The first end of the third resistor (R3) is electrically connected to the second end of the fourth switch (K4), the second end of the third resistor (R3) is the second end of the pre-charging circuit, and the first end of the fourth switch (K4) is the first end of the pre-charging circuit.

18. The charging and discharging system (200) according to claim 14, characterized in that The battery pack (150) comprises: a first battery unit (110) and a second battery unit (120); the first battery unit (110) and the second battery unit (120) are connected in series; The positive electrode of the first battery unit (110) is electrically connected to the first end of the third switch (K3), and the negative electrode of the first battery unit (110) is electrically connected to the first end of the first switch (K1); The first end of the second battery unit (120) is electrically connected to the negative electrode of the first battery unit (110), and the second end of the second battery unit (120) is electrically connected to the first end of the second switch (K2).

19. The charging and discharging system (200) according to claim 18, characterized in that The charging and discharging system (200) further includes: a fifth switch (K5); The first end of the fifth switch (K5) is electrically connected to the first end of the charging port, and the second end of the fifth switch (K5) is electrically connected to the second end of the third switch (K3).

20. The charging and discharging system (200) according to claim 14, characterized in that The charging and discharging system (200) further includes: a sixth switch (K6) and a seventh switch (K7); The first end of the sixth switch (K6) is electrically connected to the first end of the charging port, and the second end of the sixth switch (K6) is electrically connected to the second end of the first switch (K1); The first end of the seventh switch (K7) is electrically connected to the second end of the charging port, and the second end of the seventh switch (K7) is electrically connected to the first end of the second switch (K2).

21. A vehicle (300), characterized in that The invention comprises the hybrid system (100) according to any one of claims 1 to 10; and / or the charge-discharge system (200) according to any one of claims 11 to 20.

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