Hybrid power system, charging and discharging system and vehicle

Abstract

The invention discloses a hybrid power system, a charging and discharging system and a vehicle, relates to the technical field of electric vehicles, and aims to improve the integration level and further reduce the cost. The hybrid power system comprises a driving control circuit and a power generation control circuit. The first end of the power generation control circuit is electrically connected with the first end of the driving control circuit; the second end of the power generation control circuit is electrically connected with the second end of the driving control circuit; the third end of the power generation control circuit is connected with the battery pack; and the power generation control circuit is used for supplying power to the driving control circuit and / or is also used for boosting and supplying power to the driving control circuit together with the battery pack.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and particularly to a hybrid system, a charge-discharge system and a vehicle. Background Art

[0002] With the development of the new energy vehicle industry and the need to enhance the competitiveness of automobile brands, higher performance requirements are put forward for hybrid vehicles: greater torque, higher power, etc. Hybrid vehicles usually carry a relatively small battery pack with a low battery pack voltage. When the vehicle has high performance requirements, it is necessary to boost the battery pack voltage and supply it to the drive motor module.

[0003] In the existing hybrid system, the boosting function and the power generation function work independently. When both functions are required, it will occupy a large space in the hybrid system, unable to meet the vehicle's requirements for high integration and extreme lightweight of the hybrid system. At the same time, the independent boosting function will further increase the vehicle cost. Summary of the Invention

[0004] The purpose of the present invention is to provide a hybrid system, a charge-discharge system and a vehicle, aiming to improve the integration degree and further reduce the cost.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a hybrid system, which includes: a drive control circuit and a power generation control circuit; the first end of the power generation control circuit is electrically connected to the first end of the drive control circuit; the second end of the power generation control circuit is electrically connected to the second end of the drive control circuit; the third end of the power generation control circuit is used to connect to the battery pack; the power generation control circuit is used to supply power to the drive control circuit, and / or, is further used to boost the voltage and supply power to the drive control circuit together with the battery pack.

[0006] Based on the above solution, some embodiments of the present application provide a hybrid system, which boosts the voltage and supplies power to the drive control circuit by reusing the power generation control circuit. By changing the connection mode between the power generation control circuit and the drive control circuit to replace the independent boosting module, not only can the weight of the hybrid system be reduced, but also the integration degree of the hybrid system can be further improved; and different from the independent boosting function module in the prior art, the reuse of the power generation control circuit can significantly reduce the electrical control material and production cost.

[0007] 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 boosts the voltage and supplies power to the drive control circuit together with the battery pack.

[0008] 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 supply power to the drive control circuit and boost the power supply to the drive control circuit together with the battery pack.

[0009] In some embodiments, when the energy storage of the battery pack is less than the set threshold, the power generation control circuit is used to supply power to the drive control circuit.

[0010] In some embodiments, the drive control circuit includes: a plurality of first bridge arms; the first ends of the plurality of first bridge arms are electrically connected to the first end of the drive control circuit, and the second ends of the plurality of first bridge arms are electrically connected to the second end of the drive control circuit.

[0011] 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 end point of the first power device and the second power device serves as the third end of the first bridge arm.

[0012] In some embodiments, the drive control circuit further includes: a first motor; the first motor includes: a plurality of input ends; the plurality of input ends of the first motor are respectively and correspondingly connected to the third ends of the plurality of first bridge arms.

[0013] In some embodiments, the power generation control circuit includes: a plurality of second bridge arms; the first ends of the plurality of second bridge arms are electrically connected to the first end of the power generation control circuit, and the second ends of the plurality of second bridge arms are electrically connected to the second end of the power generation control circuit.

[0014] 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 end point of the third power device and the fourth power device serves as the third end of the second bridge arm.

[0015] In some embodiments, the drive control circuit further includes: a second motor; the second motor includes: a plurality of input ends; the plurality of input ends of the second motor are respectively and correspondingly connected to the third ends of the plurality of second bridge arms.

[0016] 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.

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

[0018] In a second aspect, the present application provides a charge-discharge system, including the hybrid system and a battery pack provided in any of the above embodiments.

[0019] Among them, the beneficial effects in the second aspect and its possible embodiments can refer to the first aspect, which will not be elaborated here.

[0020] In some embodiments, the charge-discharge system further includes: a first switch and a second switch; a first end of the first switch is electrically connected to the positive electrode of the battery pack, and a second end of the first switch is electrically connected to a third end of the power generation control circuit; a first end of the second switch is electrically connected to the negative electrode of the battery pack, and a second end of the second switch is electrically connected to a second end of the power generation control circuit.

[0021] In some embodiments, the charge-discharge system further includes: a charging port; a first end of the charging port is electrically connected to a second end of the first switch, and a second end of the charging port is electrically connected to a first end of the second switch.

[0022] In some embodiments, the charge-discharge system further includes: a third switch; a first end of the third switch is electrically connected to the positive electrode of the battery pack, and a second end of the third switch is electrically connected to a 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 supply power to the drive control circuit.

[0023] 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 both the power generation control circuit and the battery pack are used to supply power to the drive control circuit.

[0024] In some embodiments, the charge-discharge system further includes: a pre-charge circuit; a first end of the pre-charge circuit is electrically connected to a first end of the first switch, and a second end of the pre-charge circuit is electrically connected to a second end of the first switch.

[0025] In some embodiments, the pre-charge circuit includes: a third resistor and a fourth switch; a first end of the third resistor is electrically connected to a second end of the fourth switch, a second end of the third resistor is the second end of the pre-charge circuit, and a first end of the fourth switch is the first end of the pre-charge circuit.

[0026] 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 a third switch, and the negative electrode of the first battery cell is electrically connected to the first end of a 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 a second switch.

[0027] In some embodiments, the charging and discharging system further includes: a fifth switch; the first end of the fifth switch is electrically connected to the first end of a charging port, and the second end of the fifth switch is electrically connected to the second end of the third switch.

[0028] 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 a 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.

[0029] In a third aspect, the present application provides a vehicle, including the hybrid system provided in any of the above embodiments; and / or, the charging and discharging system provided in any of the embodiments.

[0030] Among them, the beneficial effects in the third aspect and its possible embodiments can refer to the first aspect, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1 It is a schematic diagram of an existing hybrid system; Figure 2 It is a schematic diagram of a hybrid system provided by an embodiment of the present application; Figure 3 It is a schematic diagram of another hybrid system provided by an embodiment of the present application; Figure 4 It is a schematic diagram of yet another hybrid system provided by an embodiment of the present application; Figure 5 It is a schematic diagram of still another hybrid system provided by an embodiment of the present application; Figure 6 It is a schematic diagram of still another hybrid system provided by an embodiment of the present application; Figure 7 It is a schematic diagram of a charging and discharging system provided by an embodiment of the present application; Figure 8 Schematic diagram of another charge-discharge system provided by an embodiment of the present application; Figure 9 Schematic diagram of yet another charge-discharge system provided by an embodiment of the present application; Figure 10 Schematic diagram of a battery pack provided by an embodiment of the present application; Figure 11 Schematic diagram of a vehicle provided by an embodiment of the present application.

[0033] Reference numerals: 1, drive control circuit; 11, first arm; 2, power generation control circuit; 21, second 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 unit; 120, second battery unit; 130, fuse; 140, pre-charge circuit; 150, battery pack; 200, charge-discharge system; 300, vehicle. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. is based on the orientation or relative positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. Without special instructions, in the case of satisfying the relative positional relationship shown in the accompanying drawings, the above-mentioned orientation descriptions can be flexibly set during the actual application process.

[0036] 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", and "communicated with" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. It may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the embodiments of the present invention, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, such that a process, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, article or device comprising such element.

[0039] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean for example, illustration or explanation. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be construed as being more preferred or having more advantages than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0040] With the development of the new energy vehicle industry and the need to enhance the competitiveness of automobile brands, higher performance requirements are also put forward for hybrid vehicles: greater torque, higher power, etc. Hybrid vehicles usually carry a relatively small battery pack with a low battery pack voltage. When the vehicle has high performance requirements, it is necessary to boost the battery pack voltage and supply it to the drive motor module.

[0041] In the hybrid system under the prior art, the boost function and the power generation function work independently. When both functions are required, it will occupy a large space in the hybrid system, unable to meet the vehicle's requirements for high integration and extreme lightweight of the hybrid system. At the same time, the independent boost function will further increase the vehicle cost.

[0042] For example, referring to Figure 1 , Figure 1In it, an independent DC-DC buck-boost module is adopted to boost the voltage of the battery pack. This functional module includes a buck-boost control module and a power inductor (usually, an H-bridge interleaved control method is adopted to suppress the ripple voltage). MGX1 is a drive motor, which is controlled by a drive control module. MGX2 is a generator, which is controlled by a power generation control module. When the vehicle has a large torque / power demand, on the one hand, the prime mover (internal combustion engine) drives the generator to generate electricity to supply energy to the drive motor, and on the other hand, the DC-DC buck-boost module boosts the voltage of the battery pack and then supplies energy to the drive motor. These two working conditions are independent of each other.

[0043] Moreover, the independent DC-DC functional module increases the component cost on the one hand, and on the other hand, due to the greater demand for the electronic control box, it increases the material cost, resulting in an overall increase in the cost of the whole vehicle.

[0044] Based on this, the embodiment of the present application provides a hybrid system. As Figure 2 shown, the hybrid system 100 includes: a drive control circuit 1 and a power generation control circuit 2.

[0045] 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; the third end of the power generation control circuit 2 is used to connect to the battery pack 150.

[0046] The power generation control circuit 2 is used to supply power to the drive control circuit 1, and / or, is also used to boost the voltage to supply power to the drive control circuit 1 together with the battery pack 150.

[0047] The function of the power generation control circuit 2 is to convert kinetic energy into electrical energy, and then supply power to the drive control circuit 1. And there is an energy storage circuit in the power generation control circuit 2. When the voltage of the battery pack 150 is less 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 supply power to the energy storage circuit, and then the battery pack 150 and the energy storage circuit in the power generation control circuit 2 supply power to the drive control circuit 1 together.

[0048] Among them, the power generation control circuit 2 can only supply power to the drive control circuit 1, and at this time, the battery pack 150 does not supply power; or, the power generation control circuit 2 does not generate electricity, and the battery pack 150 reuses the energy storage circuit in the power generation control circuit 2 to boost the voltage and supply power; or, the power generation control circuit 2 generates electricity, and the battery pack 150 reuses the energy storage circuit in the power generation control circuit 2 to boost the voltage and supply power.

[0049] In this way, compared with the prior art, there is no need to separately set a boost module, and only the power generation control circuit 2 needs to be reused; at the same time, the integration degree of the hybrid system 100 is higher, and the overall cost of the hybrid system 100 is reduced.

[0050] In some embodiments, the power generation control circuit 2 converts kinetic energy into electrical energy and can also charge the battery pack 150.

[0051] Based on the above solution, some embodiments of the present application provide a hybrid system 100. This hybrid system 100 boosts the power supply for the drive control circuit 1 by reusing the power generation control circuit 2. By changing the connection mode between the power generation control circuit 2 and the drive control circuit 1 to replace the independent boost module, not only can the weight of the hybrid system 100 be reduced, but also the integration degree of the hybrid system 100 can be further improved. Moreover, different from the independent boost function module in the prior art, the reuse of the power generation control circuit 2 can significantly reduce the electrical control material and production costs.

[0052] As Figure 2 shown, in some embodiments, the drive control circuit 1 includes: 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.

[0053] When the battery pack 150 or the power generation control circuit 2 supplies power to the drive control circuit 1, the corresponding bridge arms in the plurality of first bridge arms 11 are turned on.

[0054] The first bridge arm 11 includes: a first power device M1 and a second power device M2.

[0055] 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 end point of the first power device M1 and the second power device M2 serves as the third end of the first bridge arm 11.

[0056] In some embodiments, the first power device M1 and the second power device M2 are transistors, that is, MOS transistors.

[0057] 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.

[0058] As Figure 2 shown, in some embodiments, the drive control circuit 1 further includes: a first motor MG1.

[0059] The first motor MG1 includes: a plurality of input ends; the plurality of input ends of the first motor MG1 are respectively and correspondingly connected to the third ends of the plurality of first bridge arms 11.

[0060] 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 a 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.

[0061] Among them, the function of the first motor MG1 is to convert electrical energy into kinetic energy, and the function of the multiple first bridge arms 11 is to convert direct current into alternating current and supply power to the motor through the alternating current.

[0062] Refer to 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.

[0063] When the battery pack 150 or the power generation control circuit 2 supplies power to the drive control circuit 1, the corresponding bridge arms in the multiple second bridge arms 21 are turned on.

[0064] Refer to Figure 2 , in some embodiments, the second bridge arm 21 includes: a third power device M3 and a fourth power device M4.

[0065] 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 end point of the third power device M3 and the fourth power device M4 serves as the third end of the second bridge arm 21.

[0066] In some embodiments, the third power device M3 and the fourth power device M4 are transistors, that is, MOS transistors.

[0067] 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 devices M1 of the remaining first bridge arms 11 are turned off, and the second power devices M2 are turned on; the fourth power device M4 of another second bridge arm 21 is turned on. In this way, a power supply loop can be formed.

[0068] Refer to Figure 2, in some embodiments, the drive control circuit 1 further includes: a second motor MG2; the second motor MG2 includes: a plurality of input terminals; the plurality of input terminals of the second motor MG2 are respectively and correspondingly connected to the third ends of a plurality of second bridge arms 21.

[0069] 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 the other 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 an input terminal 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 terminals and the second power devices M2 of the remaining first bridge arms 11, thereby forming a power supply loop.

[0070] Among them, the function of the second motor MG2 is to convert kinetic energy into electrical energy, and the function of the plurality of second bridge arms 21 is to convert alternating current into direct current, transmit the direct current to the drive control circuit 1, and the drive control circuit 1 then converts the direct current into alternating current to supply power to the first motor MG1.

[0071] As Figure 3 shown, in some embodiments, the hybrid system 100 further includes: a first capacitor C1 and a first resistor R1.

[0072] 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.

[0073] As Figure 3 shown, in some embodiments, the hybrid system 100 further includes: a second capacitor C2 and a second resistor R2.

[0074] 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.

[0075] Among them, the above-mentioned first capacitor C1 and second capacitor C2 play a role in energy storage. The first capacitor C1 mainly stores the electric energy provided for the drive control circuit 1, and the second capacitor C2 mainly stores the electric energy provided by the battery pack 150.

[0076] As Figure 4 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 boost the voltage to supply power to the drive control circuit 1.

[0077] Among them, the bus voltage of the drive control circuit 1 can also be understood as the required voltage for the normal operation of the drive control circuit 1.

[0078] That is to say, 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, the battery pack 150 boosts the low voltage of the battery pack 150 through the second motor MG2 in the power generation control circuit 2 and supplies power to the drive control circuit 1 to meet the voltage and power requirements of the first motor MG1. At this time, the second motor MG2 does not generate electricity, and the power generation control circuit 2 multiplexes the winding of the second motor MG2 as a power inductor to boost the voltage of the battery pack 150.

[0079] As Figure 5 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 supply power to the drive control circuit 1 and boost the voltage to supply power to the drive control circuit 1 together with the battery pack 150.

[0080] 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, first, the battery pack 150 boosts the voltage of the battery pack 150 by multiplexing the winding of the second motor MG2 as a power inductor, and then the second motor MG2 works to convert kinetic energy into an electric circuit. The second bridge arm 21 in the power generation control circuit 2 controls the power generation voltage and supplies power to the drive control circuit 1; thus meeting the voltage and power requirements of the second motor MG2.

[0081] As Figure 6 shown, in some embodiments, when the energy storage of the battery pack 150 is less than the set threshold, the power generation control circuit 2 is used to supply power to the drive control circuit 1.

[0082] Among them, the set threshold is the minimum voltage for the normal operation of the battery pack 150. When the energy storage of the battery pack 150 is less than the set threshold, it indicates that the battery pack 150 at this time can no longer meet the voltage required for the normal operation of the first motor MG1. At this time, the second motor MG2 in the power generation control circuit 2 needs to generate electricity to supply power to the first motor MG1.

[0083] For example, when the vehicle has a power preservation requirement and the output power of the battery pack 150 can meet the required power of the drive control circuit 1, the second motor MG2 operates to convert kinetic energy into electrical energy, controls the power generation voltage through the second bridge arm 21 of the power generation control circuit 2, and supplies power to the drive control circuit 1 to meet the voltage and power requirements of the drive control circuit 1.

[0084] As Figure 7 shown, the present application also provides a charge and discharge system 200, including: a hybrid system 100 and a battery pack 150.

[0085] In some embodiments, the charge and discharge system 200 further includes: a first switch K1 and a second switch K2.

[0086] 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.

[0087] 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, the first switch K1 and the second switch K2 are closed at this time. The battery pack 150 boosts the low voltage of the battery pack 150 through the second motor MG2 in the power generation control circuit 2 and supplies power to the drive control circuit 1 to meet the voltage and power requirements of the first motor MG1. At this time, the second motor MG2 does not generate electricity, and the power generation control circuit 2 multiplexes the winding of the second motor MG2 as a power inductor to boost the voltage of the battery pack 150.

[0088] 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 multiplexing the winding of the second motor MG2 as a power inductor, and then the second motor MG2 operates to convert kinetic energy into an electric circuit. The second bridge arm 21 in the power generation control circuit 2 controls the power generation voltage and supplies power to the drive control circuit 1; thereby meeting the voltage and power requirements of the second motor MG2.

[0089] As Figure 7As 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 a second end of the second switch K2, and the first end of the fuse 130 is electrically connected to a second end of the second resistor R2.

[0090] In some embodiments, the charge and discharge system 200 further includes: a charging port.

[0091] A first end of the charging port is electrically connected to a second end of the first switch K1, and a second end of the charging port is electrically connected to a first end of the second switch K2.

[0092] For example, when the first switch K1 and the second switch K2 are closed, current passes through the charging port to charge the battery pack 150.

[0093] As Figure 7 and Figure 8 shown, in some embodiments, the charge and discharge system 200 further includes: a third switch K3.

[0094] 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 a first end of the power generation control circuit 2.

[0095] 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.

[0096] That is to say, the battery pack 150 can directly supply power to the drive control circuit 1 through the third switch K3 without passing through the power generation control circuit 2.

[0097] As Figure 9 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 both the power generation control circuit 2 and the battery pack 150 are used to supply power to the drive control circuit 1.

[0098] Referring to Figures 7 to 9 , in some embodiments, the charge and discharge system 200 further includes: a pre-charge circuit 140.

[0099] A first end of the pre-charge circuit 140 is electrically connected to a first end of the first switch K1, and a second end of the pre-charge circuit 140 is electrically connected to a second end of the first switch K1.

[0100] The pre-charge circuit 140 includes: a third resistor R3 and a fourth switch K4; a first end of the third resistor R3 is electrically connected to a second end of the fourth switch K4, a second end of the third resistor R3 is the second end of the pre-charge circuit 140, and a first end of the fourth switch K4 is the first end of the pre-charge circuit 140.

[0101] For example, before power-on, the fourth switch K4 is controlled to conduct, and the pre-charge circuit 140 operates to store electrical energy in the second capacitor C2.

[0102] As Figure 10 shown, in some embodiments, the battery pack 150 includes: a first battery cell 110 and a second battery cell 120.

[0103] 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.

[0104] Among them, the series connection of multiple battery cells can achieve self-heating of the battery pack 150 by turning on and off the first switch K1.

[0105] In some embodiments, the charge and discharge 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.

[0106] In some embodiments, the charge and discharge system 200 further includes: a sixth switch K6 and a seventh switch K7.

[0107] 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.

[0108] Among them, the sixth switch K6 and the seventh switch K7 mainly control the on and off of the charging port.

[0109] As Figure 11 shown, the present application further provides a vehicle 300, including the hybrid system 100 provided in any of the above embodiments; and / or, the charge and discharge system 200 provided in any of the embodiments.

[0110] For example, the vehicle 300 is a new energy vehicle. When the new energy vehicle is running normally, 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, the battery pack 150 boosts the low voltage of the battery pack 150 through the second motor MG2 in the power generation control circuit 2, and supplies power to the drive control circuit 1 to meet the voltage and power requirements of the first motor MG1. At this time, the second motor MG2 does not generate electricity, and the power generation control circuit 2 reuses the winding of the second motor MG2 as a power inductor to boost the voltage of the battery pack 150.

[0111] 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, 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 second motor MG2 works to convert kinetic energy into electricity. The second bridge arm 21 in the power generation control circuit 2 controls the power generation voltage and supplies power to the drive control circuit 1, so as to meet the voltage and power requirements of the second motor MG2.

[0112] When the new energy vehicle stops running, or when the new energy vehicle has a power preservation requirement and the output power of the battery pack 150 can meet the required power of the drive control circuit 1, the second motor MG2 works to convert kinetic energy into electrical energy. The second bridge arm 21 of the power generation control circuit 2 controls the power generation voltage and supplies power to the drive control circuit 1 to meet the voltage and power requirements of the drive control circuit 1.

[0113] In the description of this specification, specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0114] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope 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) is used to supply power to the drive control circuit (1), and / or is also used together with the battery pack (150) to boost the voltage of the drive control circuit (1).

2. The hybrid system (100) according to claim 1, characterized in that: 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 to the drive control circuit (1).

3. The hybrid system (100) according to claim 2, characterized in that: 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 supply power to the drive control circuit (1), and together with the battery pack (150) provides voltage boost to the drive control circuit (1).

4. 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).

5. The hybrid system (100) according to any one of claims 1 to 4, 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).

6. The hybrid system (100) according to claim 5, 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 end point of the first power device (M1) and the second power device (M2) serves as the third end of the first bridge arm (11).

7. The hybrid system (100) according to claim 6, characterized in that: The drive control circuit (1) further comprises: a first motor (MG1); the first motor (MG1) comprises: 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.

8. The hybrid system (100) according to any one of claims 1 to 4, 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).

9. The hybrid system (100) according to claim 8, 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 end point of the third power device (M3) and the fourth power device (M4) serves as the third end of the second bridge arm (21).

10. The hybrid system (100) according to claim 9, characterized in that: The drive control circuit (1) further comprises: a second motor (MG2); the second motor (MG2) comprises: 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.

11. 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); 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).

12. The hybrid system (100) according to claim 1, characterized in that: The hybrid system (100) further includes: a second capacitor (C2) and a second resistor (R2); 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).

13. 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 12, connected to the battery pack (150).

14. The charging and discharging system (200) according to claim 13, 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); A first end of the second switch (K2) is electrically connected to the negative electrode of the battery pack (150), and a second end of the second switch (K2) is electrically connected to a second end of the power generation control circuit (2).

15. The charging and discharging system (200) according to claim 14, characterized in that: The charging and discharging system (200) further comprises: 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).

16. The charging and discharging system (200) according to claim 15, 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 a 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).

17. The charging and discharging system (200) according to claim 16, 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).

18. The charging and discharging system (200) according to claim 14, 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).

19. The charging and discharging system (200) according to claim 18, characterized in that: The pre-charging circuit comprises: 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.

20. The charging and discharging system (200) according to claim 16, 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).

21. The charging and discharging system (200) according to claim 20, characterized in that: The charging and discharging system (200) further includes: a fifth switch (K5); A first end of the fifth switch (K5) is electrically connected to a first end of the charging port, and a second end of the fifth switch (K5) is electrically connected to a second end of the third switch (K3).

22. The charging and discharging system (200) according to claim 16, characterized in that: The charging and discharging system (200) further includes: a sixth switch (K6) and a seventh switch (K7); A first end of the sixth switch (K6) is electrically connected to a first end of the charging port, and a second end of the sixth switch (K6) is electrically connected to a 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).

23. A means of transport (300), characterized in that: It comprises the hybrid system (100) according to any one of claims 1 to 12; and / or the charging and discharging system (200) according to any one of claims 13 to 22.

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