Charging system, power assembly and vehicle

Abstract

The utility model discloses a charging system, a power assembly and a vehicle. The charging system comprises a generator; the generator control unit is connected with the generator; the photovoltaic unit is connected with the generator control unit; the battery is connected with the generator control unit; wherein the generator control unit is used for boosting the direct current output by the photovoltaic unit and then providing the direct current to the battery. According to the charging system, the power assembly and the vehicle, occupied space can be effectively reduced, and cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and more particularly to a charging system, a powertrain, and a vehicle. Background Art

[0002] At present, the photovoltaic charging system on electric vehicles is to boost the output power of the photovoltaic panel through a primary boost circuit, and then input it into the power battery to realize the photovoltaic charging function. The boost circuit of this solution is an independent device, which needs to occupy a certain space in the vehicle and has a high cost.

[0003] Therefore, improvements are needed to at least partially solve the above problems. Utility Model Content

[0004] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0005] In order to at least partially solve the above problems, according to a first aspect of the present utility model, a charging system is provided, comprising:

[0006] dynamo;

[0007] A generator control unit connected to the generator;

[0008] A photovoltaic unit connected to the generator control unit;

[0009] a battery connected to the generator control unit;

[0010] The generator control unit is used to boost the direct current output by the photovoltaic unit and then provide it to the battery.

[0011] Exemplarily, the generator control unit includes a first bridge arm, a second bridge arm and a third bridge arm connected in parallel;

[0012] Two ends of the first bridge arm, two ends of the second bridge arm and two ends of the third bridge arm are respectively connected to the positive bus and the negative bus;

[0013] The bridge arm midpoint of the first bridge arm, the bridge arm midpoint of the second bridge arm and the bridge arm midpoint of the third bridge arm are respectively connected to the three-phase winding of the generator.

[0014] Exemplarily, the photovoltaic unit includes a photovoltaic panel and a switch subunit;

[0015] The switch subunit is connected to the photovoltaic panel and the generator control unit, and is used to control the on and off of the photovoltaic panel and the generator control unit.

[0016] Exemplarily, the first input terminal of the switch subunit is connected to the positive input terminal of the photovoltaic panel, the second input terminal of the switch subunit is connected to the negative output terminal of the photovoltaic panel, the first output terminal of the switch subunit is connected to at least one of the midpoint of the first bridge arm, the midpoint of the second bridge arm and the midpoint of the third bridge arm, and the second output terminal of the switch subunit is connected to the negative bus.

[0017] Exemplarily, the switch subunit includes a first switch and a first inductor;

[0018] The first switch is connected in series with the first inductor, a first end of the first switch and the first inductor as a whole is connected to the positive output end of the photovoltaic panel, and a second end of the first switch and the first inductor as a whole is connected to at least one of a bridge arm midpoint of the first bridge arm, a bridge arm midpoint of the second bridge arm, and a bridge arm midpoint of the third bridge arm;

[0019] The negative output terminal of the photovoltaic panel is connected to the negative busbar.

[0020] Exemplarily, the switch subunit includes a second switch and a second inductor, and the second inductor has two or three;

[0021] The first end of the second switch is connected to the positive output end of the photovoltaic panel, and the second end of the second switch is connected to the first end of each of the second inductors;

[0022] The second end of each of the second inductors is respectively connected to two or three of the bridge arm midpoint of the first bridge arm, the bridge arm midpoint of the second bridge arm and the bridge arm midpoint of the third bridge arm;

[0023] The negative output terminal of the photovoltaic panel is connected to the negative busbar.

[0024] Exemplarily, the switch subunit further includes a third switch, a first end of the third switch is connected to the negative output end of the photovoltaic panel, and a second end of the third switch is connected to the negative bus.

[0025] Exemplarily, the charging system further includes a motor and a motor control unit;

[0026] The motor control unit comprises a fourth bridge arm, a fifth bridge arm and a sixth bridge arm connected in parallel;

[0027] Two ends of the fourth bridge arm, two ends of the fifth bridge arm and two ends of the sixth bridge arm are respectively connected to the positive bus and the negative bus;

[0028] The bridge arm midpoint of the fourth bridge arm, the bridge arm midpoint of the fifth bridge arm and the bridge arm midpoint of the sixth bridge arm are respectively connected to the three-phase winding of the motor.

[0029] Exemplarily, the charging system further includes a DC-DC conversion unit, and the generator control unit is connected to the battery via the DC-DC conversion unit.

[0030] Exemplarily, the DC-DC conversion unit includes a seventh bridge arm, an eighth bridge arm, a third inductor and a fourth inductor;

[0031] Both ends of the seventh bridge arm and both ends of the eighth bridge arm are connected to the positive bus and the negative bus respectively;

[0032] A bridge arm midpoint of the seventh bridge arm and a bridge arm midpoint of the eighth bridge arm are connected to a first end of the third inductor and a first end of the fourth inductor respectively;

[0033] The second end of the third inductor and the second end of the fourth inductor are both connected to the positive terminal of the battery;

[0034] The negative terminal of the battery is connected to the negative bus bar.

[0035] According to a second aspect of the present utility model, a powertrain is provided, which includes the charging system as described above.

[0036] According to a third aspect of the utility model, a vehicle is provided, which includes the power assembly as described above.

[0037] According to the charging system, powertrain and vehicle of the utility model, the generator control unit is reused as a boost device to boost the direct current output by the photovoltaic unit to charge the battery. There is no need to set up a separate boost device, which can effectively reduce space occupancy and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The following drawings of the present application are hereby used as part of the present application for understanding the present application. The drawings show the embodiments of the present application and their descriptions, and are used to explain the device and principle of the present application. In the drawings,

[0039] Figure 1 is a schematic structural block diagram of a charging system according to an embodiment of the present application;

[0040] Figure 2 is a circuit diagram of a charging system according to an embodiment of the present application;

[0041] Figure 3 is a circuit diagram of a charging system according to an embodiment of the present application;

[0042] Figure 4 FIG. 4 is a circuit diagram of a charging system according to an embodiment of the present application.

[0043] Description of reference numerals:

[0044] 100 - generator, 200 - motor, 300 - generator control unit, 400 - motor control unit, 500 - photovoltaic unit, 510 - photovoltaic panel, 520 - switch subunit, 600 - DC-DC conversion unit, 700 - battery. DETAILED DESCRIPTION

[0045] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it is apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application, some technical features well known in the art are not described.

[0046] It should be understood that the present application can be implemented in different forms and should not be construed as being limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete and fully convey the scope of the present application to those skilled in the art. In the accompanying drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity. The same reference numerals throughout represent the same elements.

[0047] It should be understood that although the terms first, second, third, etc. can be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present application, the first element, component, region, layer or part discussed below can be represented as a second element, component, region, layer or part.

[0048] Spatially relative terms such as "under", "beneath", "below", "under", "above", "above", etc., may be used herein for convenience of description to describe the relationship of one element or feature to other elements or features shown in the figures. It should be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation shown in the figures.

[0049] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be limiting of the present application. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0050] See attached Figure 1 The charging system according to an embodiment of the present application is exemplarily described. The charging system can be applied to a vehicle, and includes a generator 100, a motor 200, a generator control unit 300, a motor control unit 400, a photovoltaic unit 500, a DC-DC conversion unit 600, and a battery 700.

[0051] The generator control unit 300 is connected to the generator 100 and the motor control unit 400. The generator control unit 300 is used to convert the AC power output by the generator 100 into DC power and provide it to the motor control unit 400. The motor control unit 400 is connected to the motor 200 and is used to convert the DC power from the generator control unit 300 into AC power and provide it to the motor 200 to drive the motor 200 to work. The motor control unit 400 is also connected to the battery 700 through the DC-DC conversion unit 600. The battery 700 can be, for example, a power battery on a vehicle. The DC power from the generator control unit 300 can be provided to the battery 700 through the DC-DC conversion unit 600 to charge the battery 700.

[0052] The photovoltaic unit 500 is connected to the generator control unit 300, and the generator control unit 300 can also be used to boost the DC power output by the photovoltaic unit 500 and then provide it to the battery 700 and the motor control unit 400 when the generator 100 is not working, so as to charge the battery 700. The motor control unit 400 can convert the DC power from the generator control unit 300 into AC power and provide it to the motor 200 to drive the motor 200 to work.

[0053] According to the charging system of the present application, the generator control unit 300 is reused as a boost device to boost the DC power output by the photovoltaic unit 500 to charge the battery 700. There is no need to set up a separate boost device, which can effectively reduce space occupancy and reduce costs.

[0054] In the embodiment of the present application, when the generator 100 is working and the photovoltaic unit 500 is not working, the generator control unit 300 can convert the AC power output by the generator 100 into DC power and provide it to the motor control unit 400 and the DC-DC conversion unit 600, and the motor control unit 400 can convert the DC power from the generator control unit 300 into AC power and provide it to the motor 200 to drive the motor 200 to work, and the excess power can be output to the battery 700 through the DC-DC conversion unit 600 to charge the battery 700. When the generator 100 is not working and the photovoltaic unit 500 is working, the generator control unit 300 can boost the DC power output by the photovoltaic unit 500 and then provide it to the motor control unit 400, and the motor control unit 400 can convert the DC power from the generator control unit 300 into AC power and provide it to the motor 200 to drive the motor 200 to work, and the excess power can be output to the battery 700 through the DC-DC conversion unit 600 to charge the battery 700. When the generator 100 and the motor 200 are not working and the photovoltaic unit 500 is working, the generator control unit 300 can boost the direct current output by the photovoltaic unit 500 and then provide it to the battery 700 through the DC-DC conversion unit 600 to charge the battery 700.

[0055] That is to say, the charging system according to the embodiment of the present application can drive the motor 200 to work through the generator 100 or the photovoltaic unit 500, and charge the battery 700 at the same time. It can also charge the battery 700 with power from the photovoltaic unit 500 when the motor 200 is not working. It integrates multiple functions in one, and can flexibly select the generator 100 or the photovoltaic unit 500 to drive the motor 200 to work according to the remaining power of the battery 700, so as to achieve efficient use of energy. For example, when the remaining power of the battery 700 is lower than the set threshold, the motor 200 can be driven to work by the generator 100, and the battery 700 can be charged at the same time to achieve fast charging; when the remaining power of the battery 700 is higher than the set threshold, the motor 200 can be driven to work by the photovoltaic assembly, and the battery 700 can be charged at the same time without starting the generator 100, so as to reduce energy consumption.

[0056] See attached Figure 2In the embodiment of the present application, the generator control unit 300 includes a first bridge arm, a second bridge arm and a third bridge arm connected in parallel. The first bridge arm includes a switch tube Q1 and a switch tube Q2 arranged in series, and the first end of the switch tube Q1 is connected to the first end of the switch tube Q2; the second bridge arm includes a switch tube Q3 and a switch tube Q4 arranged in series, and the first end of the switch tube Q3 is connected to the first end of the switch tube Q4; the third bridge arm includes a switch tube Q5 and a switch tube Q6 arranged in series, and the first end of the switch tube Q5 is connected to the first end of the switch tube Q6. Both ends of the first bridge arm, both ends of the second bridge arm and both ends of the third bridge arm are respectively connected to the positive bus BUS+ and the negative bus BUS-. That is, the second end of the switch tube Q1 and the second end of the switch tube Q2 are connected to the positive bus BUS+ and the negative bus BUS- respectively; the second end of the switch tube Q3 and the second end of the switch tube Q4 are connected to the positive bus BUS+ and the negative bus BUS- respectively; the second end of the switch tube Q5 and the second end of the switch tube Q6 are connected to the positive bus BUS+ and the negative bus BUS- respectively. The midpoint of the first bridge arm (that is, the first end of the switch tube Q1 and the first end of the switch tube Q2), the midpoint of the second bridge arm (that is, the first end of the switch tube Q3 and the first end of the switch tube Q4) and the midpoint of the third bridge arm (that is, the first end of the switch tube Q5 and the first end of the switch tube Q6) are respectively connected to the three-phase winding of the generator 100. In the embodiment of the present application, the switch tube Q1, the switch tube Q2, the switch tube Q3, the switch tube Q4, the switch tube Q5 and the switch tube Q6 are all NMOS tubes, and those skilled in the art may also need to use other types of switch tubes, which are not limited in the present application. In an embodiment of the present application, the charging system further includes a bus capacitor C1, a first end of the bus capacitor C1 is connected to the positive bus BUS+, a second end of the bus capacitor C1 is connected to the negative bus BUS-, and the bus capacitor C1 is used to smooth the bus voltage.

[0057] The motor control unit 400 includes a fourth bridge arm, a fifth bridge arm and a sixth bridge arm connected in parallel. The fourth bridge arm includes a switch tube Q7 and a switch tube Q8 arranged in series, and the first end of the switch tube Q7 is connected to the first end of the switch tube Q8; the fifth bridge arm includes a switch tube Q9 and a switch tube Q10 arranged in series, and the first end of the switch tube Q9 is connected to the first end of the switch tube Q10; the sixth bridge arm includes a switch tube Q11 and a switch tube Q12 arranged in series, and the first end of the switch tube Q11 is connected to the first end of the switch tube Q12. Both ends of the fourth bridge arm, both ends of the fifth bridge arm and both ends of the sixth bridge arm are respectively connected to the positive bus BUS+ and the negative bus BUS-. That is, the second end of the switch tube Q7 and the second end of the switch tube Q8 are connected to the positive bus BUS+ and the negative bus BUS- respectively; the second end of the switch tube Q9 and the second end of the switch tube Q10 are connected to the positive bus BUS+ and the negative bus BUS- respectively; the second end of the switch tube Q11 and the second end of the switch tube Q12 are connected to the positive bus BUS+ and the negative bus BUS- respectively. The bridge arm midpoint of the fourth bridge arm (that is, the first end of the switch tube Q7 and the first end of the switch tube Q8), the bridge arm midpoint of the fifth bridge arm (that is, the first end of the switch tube Q9 and the first end of the switch tube Q10) and the bridge arm midpoint of the sixth bridge arm (that is, the first end of the switch tube Q11 and the first end of the switch tube Q12) are respectively connected to the three-phase windings of the motor 200. In the embodiment of the present application, the switch tubes Q7, Q8, Q9, Q10, Q11 and Q12 are all NMOS tubes. Those skilled in the art may also need to use other types of switch tubes, which is not limited in the present application.

[0058] The DC-DC conversion unit 600 includes a seventh bridge arm, an eighth bridge arm, a third inductor L3, and a fourth inductor L4. The seventh bridge arm includes a switch tube Q13 and a switch tube Q14 arranged in series, and the first end of the switch tube Q13 is connected to the first end of the switch tube Q14; the eighth bridge arm includes a switch tube Q15 and a switch tube Q16 arranged in series, and the first end of the switch tube Q15 is connected to the first end of the switch tube Q16. Both ends of the seventh bridge arm and both ends of the eighth bridge arm are respectively connected to the positive bus BUS+ and the negative bus BUS-. That is, the second end of the switch tube Q13 and the second end of the switch tube Q14 are respectively connected to the positive bus BUS+ and the negative bus BUS-; the second end of the switch tube Q15 and the second end of the switch tube Q16 are respectively connected to the positive bus BUS+ and the negative bus BUS-. The midpoint of the seventh bridge arm (i.e., the first end of the switch tube Q13 and the first end of the switch tube Q14) is connected to the first end of the third inductor L3, the midpoint of the eighth bridge arm (i.e., the first end of the switch tube Q15 and the first end of the switch tube Q16) is connected to the first end of the fourth inductor L4, and the second end of the third inductor L3 and the second end of the fourth inductor L4 are both connected to the positive terminal of the battery 700. The negative terminal of the battery 700 is connected to the negative bus. In the embodiment of the present application, the DC-DC conversion unit 600 also includes a filter capacitor C2, and the two ends of the filter capacitor C2 are respectively connected to the positive terminal of the battery 700 and the negative terminal of the battery 700. In the embodiment of the present application, the switch tube Q13, the switch tube Q14, the switch tube Q15 and the switch tube Q16 are all NMOS tubes, and those skilled in the art may also need to use other types of switch tubes, which are not limited in the present application. It should be noted that the specific structure of the DC-DC conversion unit 600 is not limited to the form implemented in this application. For example, it may only include the seventh bridge arm and the third inductor L3, and this application does not limit this. In some embodiments, the DC-DC conversion unit 600 may not be provided in the charging system, and the motor control unit 400 may be directly connected to the battery 700, that is, the positive terminal of the battery 700 and the negative terminal of the battery 700 may be connected to the positive bus BUS+ and the negative bus BUS-, respectively.

[0059] See attached Figure 1In the embodiment of the present application, the photovoltaic unit 500 includes a photovoltaic panel 510 and a switch subunit 520. The switch subunit 520 is connected to the photovoltaic panel 510 and the generator control unit 300 to control the conduction and disconnection of the photovoltaic panel 510 and the generator control unit 300. Therefore, when the generator 100 is working, the photovoltaic panel 510 and the generator control unit 300 can be disconnected by the switch subunit 520; when the generator 100 stops working, the photovoltaic panel 510 and the generator control unit 300 can be connected by the switch subunit 520, so that the direct current output by the photovoltaic panel 510 can be provided to the generator control unit 300. An inductor can be provided in the switch subunit 520 to store and release electric energy for boosting. In some other embodiments, the photovoltaic unit 500 may also include a photovoltaic panel 510, an energy storage unit and a switch subunit 520. The energy storage unit is connected between the photovoltaic panel 510 and the switch subunit 520 to store the electrical energy generated by the photovoltaic panel 510. The switch subunit 520 can connect the energy storage unit and the generator control unit 300 so that the electricity stored in the energy storage unit can be provided to the generator control unit 300.

[0060] Specifically, the first input end of the switch subunit 520 is connected to the positive input end of the photovoltaic panel 510, the second input end of the switch subunit 520 is connected to the negative output end of the photovoltaic panel 510, the first output end of the switch subunit 520 is connected to at least one of the bridge arm midpoint of the first bridge arm, the bridge arm midpoint of the second bridge arm, and the bridge arm midpoint of the third bridge arm, and the second output end of the switch subunit 520 is connected to the negative bus. Thus, the DC power output by the photovoltaic unit 500 can be boosted by controlling the on and off of the switch tube in the corresponding bridge arm.

[0061] See attached Figure 2In the embodiment of the present application, the switch subunit 520 includes a first switch K1, a third switch K3 and a first inductor L1, the first switch K1 is connected in series with the first inductor L1, the first end of the first switch K1 and the first inductor L1 as a whole is connected to the positive output end of the photovoltaic panel 510, and the second end of the first switch K1 and the first inductor L1 as a whole is connected to the midpoint of the bridge arm of the first bridge arm. Specifically, the first end of the first switch K1 is connected to the positive output end of the photovoltaic panel 510, the second end of the first switch K1 is connected to the first end of the first inductor L1, and the second end of the first inductor L1 is connected to the midpoint of the bridge arm of the first bridge arm. The negative output end of the photovoltaic panel 510 is connected to the negative bus VBUS- through the third switch K3. Thus, when the generator 100 is working, the first switch K1 and the third switch K3 can be opened to disconnect the photovoltaic panel 510 from the generator control unit 300; when the generator 100 stops working, the first switch K1 and the third switch K3 can be closed to connect the photovoltaic panel 510 and the generator control unit 300, and the DC power output by the photovoltaic panel 510 is boosted by controlling the on and off of the switch tube Q1 and the switch tube Q2. In some other embodiments, the first end of the first inductor L1 can be connected to the positive output end of the photovoltaic panel 510, the second end of the first inductor L1 can be connected to the first end of the first switch K1, and the second end of the first switch K1 can be connected to the midpoint of the bridge arm of the first bridge arm. In some other embodiments, the third switch K3 may not be set in the switch subunit 520, and the negative output end of the photovoltaic panel 510 is directly connected to the negative bus VBUS-.

[0062] According to the charging system of this embodiment, when the remaining power of the battery 700 is higher than the set threshold (i.e., the battery 700 is fully charged), the generator 100 can be turned off, the first switch K1 and the third switch K3 are closed, and the electric energy output by the photovoltaic panel 510 is provided to the motor control unit 400 for use through the first switch K1 and the third switch K3, the first inductor L1 and the generator control unit 300, and the excess electric energy can be provided to the battery 700 for charging through the DC-DC conversion unit 600, thereby playing a role in replenishing the battery 700. When the remaining power of the battery 700 is lower than the set threshold (i.e., the battery 700 is insufficient), the generator 100 can be started, the first switch K1 and the third switch K3 are opened, the generator 100 outputs electric energy for use by the motor control unit 400, and the excess electric energy can be provided to the battery 700 for charging through the DC-DC conversion unit 600, thereby realizing fast charging of the battery 700. When the vehicle is parked, the generator 100 and the motor 200 can be turned off, and the first switch K1 and the third switch K3 are closed. The electric energy output by the photovoltaic panel 510 is provided to the battery 700 through the first switch K1 and the third switch K3, the first inductor L1, the generator control unit 300, and the DC-DC conversion unit 600 to charge the battery 700.

[0063] See attached Figure 3 In another embodiment of the present application, the second end of the first inductor L1 (i.e., the second end of the first switch K1 and the first inductor L1 as a whole) is simultaneously connected to the midpoint of the first bridge arm, the middle point of the second bridge arm, and the midpoint of the third bridge arm to achieve three-way parallel connection. Thus, when the first switch K1 and the third switch K3 are closed, the on and off of the switch tubes Q1, Q2, Q3, Q4, Q5, and Q6 can be controlled to boost the DC power output by the photovoltaic panel 510 to further improve the power and performance of the boost. In some other embodiments, the second end of the first inductor L1 (i.e., the second end of the first switch K1 and the first inductor L1 as a whole) can be simultaneously connected to any two of the midpoint of the first bridge arm, the middle point of the second bridge arm, and the midpoint of the third bridge arm.

[0064] See attached Figure 4 In another embodiment of the present application, the switch subunit 520 includes a second switch K2, a third switch K3 and two second inductors L2. The first end of the second switch K2 is connected to the positive output end of the photovoltaic panel 510, and the second end of the second switch K2 is connected to the first ends of the two second inductors L2. The second ends of the two second inductors L2 are respectively connected to the midpoint of the bridge arm of the first bridge arm and the midpoint of the bridge arm of the second bridge arm to achieve two-way parallel connection. The negative output end of the photovoltaic panel 510 is connected to the negative bus VBUS- through the third switch K3. Thus, when the generator 100 is working, the second switch K2 and the third switch K3 can be opened to disconnect the photovoltaic panel 510 from the generator control unit 300; when the generator 100 stops working, the second switch K2 and the third switch K3 can be closed to connect the photovoltaic panel 510 and the generator control unit 300, and the DC power output by the photovoltaic panel 510 is boosted by controlling the on and off of the switch tube Q1, the switch tube Q2, the switch tube Q3, and the switch tube Q4. The two parallel bridge arms can significantly improve the power and performance of the boost. In some other embodiments, the switch subunit 520 can include three second inductors L2, the second end of the second switch K2 is connected to the first end of the three second inductors L2, and the second ends of the three second inductors L2 are respectively connected to the bridge arm midpoint of the first bridge arm, the bridge arm midpoint of the second bridge arm, and the bridge arm midpoint of the third bridge arm to achieve three-way parallel connection, which can further improve the power and performance of the boost. In some other embodiments, the third switch K3 may not be provided in the switch subunit 520 , and the negative output terminal of the photovoltaic panel 510 is directly connected to the negative bus VBUS-.

[0065] An embodiment of the present application also provides a powertrain, which includes the charging system as described above.

[0066] The embodiment of the present application further provides a vehicle, comprising the powertrain as described above. The vehicle may be a hybrid vehicle.

[0067] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present application to this. A person of ordinary skill in the art may make various changes and modifications therein without departing from the scope and spirit of the present application. All these changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0068] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0069] Similarly, it should be understood that in order to streamline the present application and help understand one or more of the various utility model aspects, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the method of the present application should not be interpreted as reflecting the following intention: the claimed application requires more features than the features explicitly stated in each claim. More specifically, as reflected in the corresponding claims, the inventive point is that the corresponding technical problem can be solved with features that are less than all the features of a single disclosed embodiment. Therefore, the claims following the specific embodiment are hereby explicitly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the present application.

[0070] It will be understood by those skilled in the art that, except for mutually exclusive features, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this specification may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0071] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0072] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.

Claims

1. A charging system, characterized in that: include: dynamo; A generator control unit connected to the generator; A photovoltaic unit connected to the generator control unit; a battery connected to the generator control unit; The generator control unit is used to boost the direct current output by the photovoltaic unit and then provide it to the battery.

2. The charging system according to claim 1, characterized in that: The generator control unit comprises a first bridge arm, a second bridge arm and a third bridge arm connected in parallel; Two ends of the first bridge arm, two ends of the second bridge arm and two ends of the third bridge arm are respectively connected to the positive bus and the negative bus; The bridge arm midpoint of the first bridge arm, the bridge arm midpoint of the second bridge arm and the bridge arm midpoint of the third bridge arm are respectively connected to the three-phase winding of the generator.

3. The charging system according to claim 2, characterized in that: The photovoltaic unit includes a photovoltaic panel and a switch subunit; The switch subunit is connected to the photovoltaic panel and the generator control unit, and is used to control the on and off of the photovoltaic panel and the generator control unit.

4. The charging system according to claim 3, characterized in that: The first input end of the switch subunit is connected to the positive input end of the photovoltaic panel, the second input end of the switch subunit is connected to the negative output end of the photovoltaic panel, the first output end of the switch subunit is connected to at least one of the midpoint of the first bridge arm, the midpoint of the second bridge arm and the midpoint of the third bridge arm, and the second output end of the switch subunit is connected to the negative bus.

5. The charging system according to claim 3, characterized in that: The switch subunit includes a first switch and a first inductor; The first switch is connected in series with the first inductor, a first end of the first switch and the first inductor as a whole is connected to the positive output end of the photovoltaic panel, and a second end of the first switch and the first inductor as a whole is connected to at least one of a bridge arm midpoint of the first bridge arm, a bridge arm midpoint of the second bridge arm, and a bridge arm midpoint of the third bridge arm; The negative output terminal of the photovoltaic panel is connected to the negative busbar.

6. The charging system according to claim 3, characterized in that: The switch subunit includes a second switch and a second inductor, and the second inductor has two or three parts; The first end of the second switch is connected to the positive output end of the photovoltaic panel, and the second end of the second switch is connected to the first end of each of the second inductors; The second end of each of the second inductors is respectively connected to two or three of the bridge arm midpoint of the first bridge arm, the bridge arm midpoint of the second bridge arm and the bridge arm midpoint of the third bridge arm; The negative output terminal of the photovoltaic panel is connected to the negative busbar.

7. The charging system according to claim 5 or 6, characterized in that: The switch subunit further includes a third switch, a first end of the third switch is connected to the negative output end of the photovoltaic panel, and a second end of the third switch is connected to the negative bus.

8. The charging system according to claim 2, characterized in that: The charging system also includes a motor and a motor control unit; The motor control unit comprises a fourth bridge arm, a fifth bridge arm and a sixth bridge arm connected in parallel; Two ends of the fourth bridge arm, two ends of the fifth bridge arm and two ends of the sixth bridge arm are respectively connected to the positive bus and the negative bus; The bridge arm midpoint of the fourth bridge arm, the bridge arm midpoint of the fifth bridge arm and the bridge arm midpoint of the sixth bridge arm are respectively connected to the three-phase winding of the motor.

9. The charging system according to claim 2, characterized in that: The charging system further includes a DC-DC conversion unit, and the generator control unit is connected to the battery via the DC-DC conversion unit.

10. The charging system according to claim 9, characterized in that: The DC-DC conversion unit includes a seventh bridge arm, an eighth bridge arm, a third inductor and a fourth inductor; Both ends of the seventh bridge arm and both ends of the eighth bridge arm are connected to the positive bus and the negative bus respectively; A bridge arm midpoint of the seventh bridge arm and a bridge arm midpoint of the eighth bridge arm are connected to a first end of the third inductor and a first end of the fourth inductor respectively; The second end of the third inductor and the second end of the fourth inductor are both connected to the positive terminal of the battery; The negative terminal of the battery is connected to the negative bus bar.

11. A powertrain, characterized in that: Comprising a charging system as claimed in any one of claims 1 to 10.

12. A vehicle, characterized in that: Comprising the powertrain as claimed in claim 11.

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