CN116707284A

CN116707284A - Active relief system and car

Info

Publication number: CN116707284A
Application number: CN202210181766.9A
Authority: CN
Inventors: 郑乐平; 王俊龙; 刘国权; 王亮; 薛鹏辉
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2023-09-05

Abstract

The invention discloses an active discharging system and an automobile. The active discharge system comprises a bus capacitor, a DCDC module, an H bridge arm circuit and a charging circuit module; the DCDC module is connected with the bus capacitor and used for outputting a first discharge current when the bus capacitor is in a discharge working condition; the H bridge arm circuit is connected with the DCDC module and used for carrying out direct current to alternating current on the first bleeder current and outputting a second bleeder current; the H bridge arm circuit comprises a first single-phase bridge arm in a first full-bridge circuit of the motor controller and a second single-phase bridge arm in a second full-bridge circuit of the generator controller; and the charging circuit module is connected with the H bridge arm circuit and used for storing energy corresponding to the second discharging current. The technical scheme can reduce the circuit complexity of the active discharge system and reduce the circuit cost.

Description

Active relief system and car

Technical Field

The invention relates to the technical field of automobiles, in particular to an active discharging system and an automobile.

Background

With the development of automobiles, the automobile industry has entered a new stage of large-scale development. However, the safety problem of the automobile frequently occurs, and the high-voltage safety of the automobile gradually becomes a concern for people to purchase the automobile.

In order to ensure the life and property safety of consumers, when the automobile is powered down each time, a system fails or the whole automobile collides, the automobile needs to rapidly discharge the direct-current high-voltage circuit, for example, the discharge requires that the electric quantity of the direct-current high-voltage circuit is discharged to below 60V in 3S. However, in the related art, a special bleeder circuit is generally required to be designed to realize active discharge of the direct current high voltage loop, which not only increases the complexity of the circuit structure, but also greatly increases the cost of discharge.

Disclosure of Invention

The embodiment of the invention provides an active bleeder system and an automobile, which are used for solving the problem that the existing automobile bleeder circuit is complex in structure.

An active discharge system comprises a bus capacitor, a DCDC module, an H bridge arm circuit and a charging circuit module;

the DCDC module is connected with the bus capacitor and is used for outputting a first discharge current when the bus capacitor is in a discharge working condition;

the H bridge arm circuit is connected with the DCDC module and the bus capacitor and used for carrying out direct-current to alternating-current on the first bleeder current and outputting a second bleeder current; the H bridge arm circuit comprises a first full-bridge circuit in the motor controller and a second full-bridge circuit in the generator controller;

And the charging circuit module is connected with the H bridge arm circuit and used for storing energy corresponding to the second discharging current.

Further, the bus capacitor comprises a first bus capacitor and a second bus capacitor;

one end of the first bus capacitor is connected with the first end of the DCDC module, and the other end of the first bus capacitor is connected with the second end of the DCDC module;

one end of the second bus capacitor is connected with the third end of the DCDC module, and the other end of the second bus capacitor is connected with the fourth end of the DCDC module;

and the third end and the fourth end of the DCDC module are connected with the H bridge arm circuit.

Further, the H bridge arm circuit comprises a first full-bridge circuit, a second full-bridge circuit and a working condition switching switch;

the first connecting end of the first full-bridge circuit is connected with the third end of the DCDC module, the second connecting end of the second full-bridge circuit is connected with the fourth end of the DCDC module, and the charging connecting end of the first full-bridge circuit is connected with the charging circuit module;

the first connecting end of the second full-bridge circuit is connected with the third end of the DCDC module, the second connecting end of the second full-bridge circuit is connected with the fourth end of the DCDC module, and the charging connecting end of the second full-bridge circuit is connected with the charging circuit module;

The working condition change-over switch is arranged between the charging connecting end of the first full-bridge circuit and the charging circuit module, or between the charging connecting end of the second full-bridge circuit and the charging circuit module.

Further, the first full-bridge circuit includes N first single-phase bridge arms, each of the first single-phase bridge arms includes a first upper bridge switching tube and a first lower bridge switching tube connected in series, first ends of the N first upper bridge switching tubes are commonly connected to form a first connection end of the first full-bridge circuit, second ends of the N first lower bridge switching tubes are commonly connected to form a second connection end of the first full-bridge circuit, and a connection node between the first upper bridge switching tube and the first lower bridge switching tube is a charging connection end of the first full-bridge circuit;

the second full-bridge circuit comprises N second single-phase bridge arms, each second single-phase bridge arm comprises a second upper bridge switching tube and a second lower bridge switching tube which are connected in series, first ends of the N second upper bridge switching tubes are connected together to form a first connecting end of the second full-bridge circuit, second ends of the N second lower bridge switching tubes are connected together to form a second connecting end of the second full-bridge circuit, and a connecting node between the first upper bridge switching tubes and the second lower bridge switching tubes is a charging connecting end of the second full-bridge circuit;

Any one of the N first single-phase bridge arms and any one of the N second single-phase bridge arms form the H bridge arm circuit, wherein N is more than or equal to 1.

Further, the active discharging system further comprises a control module, wherein the control module is connected with the working condition change-over switch, the first full-bridge circuit and the second full-bridge circuit and used for controlling the working condition change-over switch, a switching tube in the first full-bridge circuit and a switching tube in the second full-bridge circuit to work.

Further, the control module is used for controlling the working condition change-over switch to be conducted when the bus capacitor is in a discharging working condition, and controlling the first upper bridge switching tube, the first lower bridge switching tube, the second upper bridge switching tube and the second lower bridge switching tube in the H bridge arm circuit to work so as to form a discharging loop; when the bus capacitor is not in a discharging working condition, the working condition change-over switch is turned off, and N first upper bridge switching tubes and N first lower bridge switching tubes are controlled to work to form a motor control loop, N second upper bridge switching tubes and N second lower bridge switching tubes are controlled to work to form a generator control loop.

Further, the charging circuit module comprises a transformer circuit and an energy storage battery circuit;

the transformer circuit is connected with the H bridge arm circuit and is used for receiving the second bleeder current output by the H bridge arm circuit and outputting a third bleeder current;

and the energy storage battery circuit is connected with the transformer circuit and used for storing energy corresponding to the third discharge current.

Further, the energy storage battery circuit comprises a first diode, a second diode, a first filter capacitor and an energy storage battery;

the anode of the first diode is connected with the first output end of the transformer circuit, and the cathode of the first diode is connected with the anode of the energy storage battery;

the anode of the second diode is connected with the second output end of the transformer circuit, and the cathode of the second diode is connected with the anode of the energy storage battery;

the negative electrode of the energy storage battery is connected with the third output end of the transformer circuit;

the first end of the first filter capacitor is connected with the positive electrode of the energy storage battery, and the second end of the first filter capacitor is connected with the negative electrode of the energy storage battery.

Further, the active vent system further includes a battery module coupled to the first and second ends of the DCDC module;

The charging circuit module further comprises a charging switch circuit, a first end of the charging switch circuit is connected with a fourth output end of the transformer circuit, a second end of the charging switch circuit is connected with a fifth output end of the transformer circuit, a third end of the charging switch circuit is connected with an anode of the battery module, and a fourth end of the charging switch circuit is connected with a cathode of the battery module.

Further, the charging switching circuit comprises a first switching tube, a second switching tube, a third switching tube and a fourth switching tube;

the first switching tube and the second switching tube are connected in series, and a connection node between the first switching tube and the second switching tube forms a first end of the charging switching circuit;

the third switching tube is connected with the fourth switching tube, and a connection node between the third switching tube and the fourth switching tube forms a second end of the charging switching circuit;

the first end of the first switching tube and the first end of the third switching tube are connected together to form a third end of the charging switching circuit;

and the second end of the second switching tube and the second end of the fourth switching tube are connected together to form the fourth end of the charging switching circuit.

Further, the active bleed system further comprises a charging interface module; the first end of the charging interface module is connected with the positive electrode of the battery module, the second end of the charging interface module is connected with the negative electrode of the battery module, and the third end of the charging interface module is connected with the H bridge arm circuit.

Further, the charging interface module comprises a direct current charging loop, an alternating current charging loop, a second switch, a third switch and a fourth switch;

the positive electrode of the direct current charging loop is connected with the positive electrode of the battery module through the second switch, and the negative electrode of the direct current charging loop is connected with the negative electrode of the battery module through the third switch;

the L pole of the alternating current charging circuit is connected with the positive pole of the battery module through the second switch, and the N pole of the alternating current charging circuit is connected with the H bridge arm circuit through the fourth switch;

the positive electrode of the direct current charging loop is the first end of the charging interface module, the negative electrode of the direct current charging loop is the second end of the charging interface module, and the N electrode of the alternating current charging loop is the third end of the charging interface module.

An automobile comprising the active vent system.

The active discharging system comprises the bus capacitor, the DCDC module, the H bridge arm circuit and the charging circuit module, wherein the DCDC module is connected with the bus capacitor, the H bridge arm circuit is connected with the DCDC module and the bus capacitor, and the charging circuit module is connected with the H bridge arm circuit.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic circuit diagram of an active bleed system according to an embodiment of the present invention;

FIG. 2 is another schematic circuit diagram of an active vent system in accordance with one embodiment of the invention.

In the figure: 11. a battery module; 12. a DCDC module; 13. an H bridge arm circuit; 131. a first full bridge circuit; 132. a second full bridge circuit; 14. a charging circuit module; 141. a transformer circuit; 142. an energy storage battery circuit; 15. a charging switch circuit; 16. a charging interface module; 17. and a control module.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the dimensions and relative dimensions of layers and regions may be exaggerated for the same elements throughout for clarity.

It will be understood that when an element or layer is referred to as being "on" …, "" adjacent to "…," "connected to" or "coupled to" another element or layer, it can be directly on, adjacent to, connected to or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on" …, "" directly adjacent to "…," "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present invention.

Spatially relative terms, such as "under …," "under …," "below," "under …," "above …," "above," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will 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 depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" or "beneath" other elements would then be oriented "on" the other elements or features. Thus, the exemplary terms "under …" and "under …" may include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of the associated listed items.

In the following description, for the purpose of providing a thorough understanding of the present invention, detailed structures and steps are presented in order to illustrate the technical solution presented by the present invention. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments in addition to these detailed descriptions.

The embodiment provides an active discharge system, which is applied to an automobile, and discharges the electric quantity of a direct-current high-voltage loop to below 60V when the automobile meets discharge conditions, so that the safety of the automobile is improved. For example, the release condition may be a large collision of the automobile, a pulled-out state of a high-voltage connector in a direct-current high-voltage circuit in the automobile, or a case of uncovering a high-voltage electric control product at high voltage, etc.

The present embodiment provides an active bleeder system, as shown in fig. 1, which includes a bus capacitor, a DCDC module 12, an H-bridge arm circuit 13, and a charging circuit module 14; the DCDC module 12 is connected with the bus capacitor and is used for outputting a first discharge current when the bus capacitor is in a discharge working condition; the H bridge arm circuit 13 is connected with the DCDC module 12 and the bus capacitor and is used for carrying out direct current to alternating current on the first bleeder current and outputting a second bleeder current; the H-bridge arm circuit 13 includes a first full-bridge circuit 131 in the motor controller and a second full-bridge circuit 132 in the generator controller; and the charging circuit module 14 is connected with the H bridge arm circuit 13 and is used for storing energy corresponding to the second discharging current.

The discharging working condition is a working condition that energy in the bus capacitor needs to be released in a certain time. For example, when an automobile fails, the voltage of the bus capacitor needs to be reduced to 60V or less within 5 seconds. For example, whether the bleeding condition is satisfied may be determined based on the current vehicle data; if the current vehicle data meets the discharging condition, the bus capacitor is in a discharging working condition; and if the current vehicle data does not meet the discharging condition, the bus capacitor is not in the discharging working condition. The current vehicle data is data which is collected at the current moment and related to the automobile and is used for judging whether the bleeding condition is met or not, so that whether the bleeding condition is met or not is determined.

The first bleed current is the current that the DCDC module 12 bleeds when the bus capacitance is in the bleed condition. The first bleeder current is the current which is obtained by converting the energy stored by the bus capacitor and needs to be bleeder. For example, the first bleed current is direct current. The second bleed-off current is a current obtained by the H-bridge arm circuit 13 after dc-ac converting the first bleed-off current. For example, the second bleed current is an alternating current.

As an example, when the bus capacitors are in the discharging working condition, the energy stored by the bus capacitors can be converted into the first discharging current, and specifically, the energy stored by at least one bus capacitor can be output in a direct current mode, so that the purpose of active discharging is achieved.

As an example, the DCDC module 12 is connected to the bus capacitor for outputting the first bleed current when the bus capacitor is in the bleed mode. In this example, when the bus capacitors are in a bleed-off condition, the energy stored by at least one bus capacitor may be output as direct current, i.e., a first bleed-off current.

As an example, the active bleeder system further includes an H-bridge arm circuit 13, where the H-bridge arm circuit 13 is connected to the DCDC module 12 and the bus capacitor, and is configured to perform dc-to-ac conversion on the first bleeder current, and output a second bleeder current. For example, the H-arm circuit 13 performs dc-to-ac conversion on the first bleed current) and outputs the second bleed current. It should be noted that the H-bridge arm circuit 13 in this example includes at least two full-bridge circuits that implement different functions. Illustratively, the H-bridge arm circuit 13 may multiplex one of the first full-bridge circuits 131 of the motor controller with one of the second full-bridge circuits 132 of the engine controller. In this example, since the second full-bridge circuit 132 of the original first full-bridge circuit 131 in the automobile is not in the working state when the bus capacitor is in the bleeder working condition, the H-bridge arm circuit 13 can be formed by multiplexing one first single-phase bridge arm of the original first full-bridge circuit 131 and one second single-phase bridge arm of the second full-bridge circuit 132 in the automobile, and the first bleeder current is directly converted into alternating current through the H-bridge arm circuit 13, and the second bleeder current is output, so that the addition of an additional bleeder circuit is avoided, the circuit complexity of the active bleeder system is further reduced, and the circuit cost is reduced.

As an example, as shown in fig. 1, the first full-bridge circuit 131 is a three-phase full-bridge circuit in the motor controller, the second full-bridge circuit 132 is a three-phase full-bridge circuit in the generator controller, or the first full-bridge circuit 131 is a three-phase full-bridge circuit in the generator controller, and the second full-bridge circuit 132 is a three-phase full-bridge circuit in the motor controller.

As an example, the first full-bridge circuit 131 is a three-phase full-bridge circuit in a motor controller in an automobile, and the second full-bridge circuit 132 is a three-phase full-bridge circuit in a generator controller. Illustratively, the first full-bridge circuit 131 includes 3 first single-phase legs, and the second full-bridge circuit 132 includes 3 second single-phase legs. Any one of the first single-phase bridge arms in the first full-bridge circuit 131 and any one of the second single-phase bridge arms in the second full-bridge circuit 132 form an H-bridge arm circuit 13, and the first bleed current is subjected to direct-current to alternating-current conversion, so that the second bleed current is output. It should be noted that, when the bus capacitor is in the discharging working condition, the three-phase full-bridge circuit in the motor controller and the three-phase full-bridge circuit in the generator controller are not in the working state, so feasibility is provided for multiplexing the power devices in the first full-bridge circuit 131 and the second full-bridge circuit 132 to form the H-bridge arm circuit 13.

In this embodiment, the first full-bridge circuit 131 is a three-phase full-bridge circuit in the motor controller, and the second full-bridge circuit 132 is a three-phase full-bridge circuit in the generator controller, and when the bus capacitor is in the bleed-off working condition, the three-phase full-bridge circuit in the motor controller and the three-phase full-bridge circuit in the generator controller are not in a working state, so that the H-bridge arm circuit 13 can be formed by any one of the first single-phase bridge arms in the first full-bridge circuit 131 and any one of the second single-phase bridge arms in the second full-bridge circuit 132, thereby avoiding adding an additional bleed-off circuit.

As an example, the active bleeder system further comprises a charging circuit module 14, the charging circuit module 14 being connected to the H-bridge arm circuit 13 for storing energy corresponding to the second bleeder current. In this example, after receiving the second bleed current output by the H-bridge arm circuit 13, the charging circuit module 14 stores energy corresponding to the second bleed current, that is, stores energy released by the bus capacitor. Illustratively, the particular time may range from 0-5 seconds. Preferably, the specific time is 3 seconds.

The active bleeder system provided by the embodiment comprises a bus capacitor, a DCDC module 12, an H bridge arm circuit 13 and a charging circuit module 14, wherein the DCDC module 12 is connected with the bus capacitor, the H bridge arm circuit 13 is connected with the DCDC module 12 and the bus capacitor, the charging circuit module 14 is connected with the H bridge arm circuit 13, when the bus capacitor is in a bleeder working condition, the DCDC module 12 can output the energy stored in the bus capacitor in a form of a first bleeder current, the H bridge arm circuit 13 is adopted to carry out direct current and alternating current on the first bleeder current, and a second bleeder current is output, so that the charging circuit module 14 can store the energy corresponding to the second bleeder current after receiving the second bleeder current output by the H bridge arm circuit 13, the active bleeder speed of the automobile is greatly improved, and the original bus capacitor, the DCDC module 12, the H bridge circuit 13 and the charging circuit module 14 of the automobile are utilized to realize the active bleeder of the automobile, so that the circuit complexity of the active bleeder system can be reduced, and the circuit cost is reduced.

In one embodiment, as shown in fig. 1, the bus capacitor includes a first bus capacitor C1 and a second bus capacitor C2; one end of the first bus capacitor C1 is connected with the first end of the DCDC module 12, and the other end of the first bus capacitor C1 is connected with the second end of the DCDC module 12; one end of the second bus capacitor C2 is connected with the third end of the DCDC module 12, and the other end of the second bus capacitor C2 is connected with the fourth end of the DCDC module 12; the third and fourth terminals of DCDC module 12 are connected to H-bridge arm circuit 13.

As an example, as shown in fig. 1, the bus capacitor includes a first bus capacitor C1 and a second bus capacitor C2. The first and second ends of the DCDC module 12 are connected to the battery module 11; the third end and the fourth end of the DCDC module 12 are connected with the H bridge arm circuit 13; one end of the first bus capacitor C1 is connected with the first end of the DCDC module 12, and the other end of the first bus capacitor C1 is connected with the second end of the DCDC module 12; one end of the second bus capacitor C2 is connected to the third end of the DCDC module 12, and the other end of the second bus capacitor C2 is connected to the fourth end of the DCDC module 12.

As an example, a first end of the DCDC module 12 is connected to the positive electrode of the battery module 11, and a second end of the DCDC module 12 is connected to the negative electrode of the battery module 11.

As an example, the battery module 11 includes a power battery BAT1, a first main positive switch S1, a first main negative switch S3, and a first fuse F1. The positive pole of the power battery BAT1 is connected to a first terminal of the first fuse F1, and a second terminal of the first fuse F1 is connected to the DCDC module 12 through the first main positive switch S1. The negative pole of the power battery BAT1 is connected to the DCDC module 12 through a first main negative switch S3.

As an example, the DCDC module 12 includes a first control tube Q1, a second control tube Q2, a third control tube Q3, and a fourth control tube Q4. In this example, the second end of the first control tube Q1 is connected to the first end of the second control tube Q2, the second end of the third control tube Q3 is connected to the first end of the fourth control tube Q4, the second end of the second control tube Q2 is connected to the second end of the fourth control tube Q4, the connection node of the first control tube Q1 and the second control tube Q2 and the connection node of the third control tube Q3 and the fourth control tube Q4 are commonly connected to form the first end of the DCDC module 12, the first end of the first control tube Q1 and the first end of the third control tube Q3 are commonly connected to form the third end of the DCDC module 12, the second end of the second control tube Q2 is the second end of the DCDC module 12, the second end of the fourth control tube Q4 is the fourth end of the DCDC module 12, and the third ends of the first control tube Q1, the second control tube Q2, the third control tube Q3 and the fourth control tube Q4 are control ends.

Preferably, the first control tube Q1, the second control tube Q2, the third control tube Q3 and the fourth control tube Q4 are field effect transistors, the first ends of the first control tube Q1, the second control tube Q2, the third control tube Q3 and the fourth control tube Q4 are sources, the second ends are drains and the third ends are gates.

As an example, one end of the first bus capacitor C1 is connected to the first end of the DCDC module 12, and the other end of the first bus capacitor C1 is connected to the second end of the DCDC module 12; one end of the second bus capacitor C2 is connected to the third end of the DCDC module 12, and the other end of the second bus capacitor C2 is connected to the fourth end of the DCDC module 12. In this example, the first bus capacitor C1 and the second bus capacitor C2 are used to filter the electrical signal flowing through the DCDC module 12 when the bus capacitors are in a bleed-off condition. When the bus capacitor is in a discharging working condition, the energy stored by the first bus capacitor C1 and the second bus capacitor C2 is required to be output in the form of a first discharging current so as to realize active discharging.

As an example, DCDC module 12 also includes a first power inductance L1 and a second power inductance L2. The first end of the first power inductor L1 is connected with a connection node of the first control tube Q1 and the second control tube Q2, and the second end of the first power inductor L1 is connected with the positive electrode of the battery module 11. The first end of the second power inductor L2 is connected to the connection node of the third control tube Q3 and the fourth control tube Q4, and the second end of the second power inductor L2 is connected to the positive electrode of the battery module 11. Illustratively, the first power inductor L1 and the second power inductor L2 are used for filtering noise, stabilizing current, suppressing electromagnetic interference, and the like.

In this embodiment, the bus capacitor includes a first bus capacitor C1 and a second bus capacitor C2, and the first end and the second end of the DCDC module 12 are connected to the battery module 11; connecting the third and fourth ends of the DCDC module 12 with the H-bridge arm circuit 13; one end of a first bus capacitor C1 is connected with a first end of the DCDC module 12, and the other end of the first bus capacitor C1 is connected with a second end of the DCDC module 12; one end of the second bus capacitor C2 is connected with the third end of the DCDC module 12, and the other end of the second bus capacitor C2 is connected with the fourth end of the DCDC module 12, so that the DCDC module 12 can output the energy stored by the first bus capacitor C1 and the second bus capacitor C2 in the form of a first bleeder current, an additional bleeder circuit is avoided, the circuit complexity of the active bleeder system is reduced, and the circuit cost is reduced.

In an embodiment, as shown in fig. 1, the H-bridge arm circuit 13 includes a first full-bridge circuit 131, a second full-bridge circuit 132, and a working condition switch S8; the first connection end of the first full-bridge circuit 131 is connected with the third end of the DCDC module 12, and the second connection end of the first full-bridge circuit 131 is connected with the fourth end of the DCDC module 12; the charging connection end of the first full-bridge circuit 131 is connected with the charging circuit module 14; the first connection end of the second full-bridge circuit 132 is connected to the third end of the DCDC module 12, and the second connection end of the second full-bridge circuit 132 is connected to the fourth end of the DCDC module 12; the charging connection end of the second full-bridge circuit 132 is connected with the charging circuit module 14; the working condition change-over switch S8 is disposed between the charging connection terminal of the first full-bridge circuit 131 and the charging circuit module 14, or between the charging connection terminal of the second full-bridge circuit 132 and the charging circuit module 14.

As an example, the first connection end of the first full-bridge circuit 131 is connected to the third end of the DCDC module 12, the second connection end of the first full-bridge circuit 131 is connected to the fourth end of the DCDC module 12, the charging connection end of the first full-bridge circuit 131 is connected to the charging circuit module 14, and the first connection end of the second full-bridge circuit 132 is connected to the third end of the DCDC module 12, the second connection end of the second full-bridge circuit 132 is connected to the fourth end of the DCDC module 12, and the charging connection end of the second full-bridge circuit 132 is connected to the charging circuit module 14 to perform dc-to-ac conversion on the first bleeder current and output the second bleeder current, thereby avoiding adding an additional bleeder circuit, improving the speed, reducing the circuit complexity of the active bleeder system, and reducing the circuit cost.

As another example, the operating mode changeover switch S8 is provided between the charging connection terminal of the first full-bridge circuit 131 and the charging circuit module 14, or between the charging connection terminal of the second full-bridge circuit 132 and the charging circuit module 14. In this example, by setting the operating mode switch S8 between the charging connection end of the first full-bridge circuit 131 and the charging circuit module 14, or setting the operating mode switch S8 between the charging connection end of the second full-bridge circuit 132 and the charging circuit module 14, it is ensured that when the bus capacitor is in the discharging mode, the operating mode switch S8 is controlled to be turned on, so that the H-bridge arm circuit 13 can perform direct-current to alternating-current on the first discharging current, and output the second discharging current; when the bus capacitor is not in the discharging working condition, the working condition change-over switch S8 is controlled to be turned off, so that the first full-bridge circuit 131 and the second full-bridge circuit 132 do not enter the discharging loop, and the original functions are executed.

In this embodiment, the H bridge arm circuit 13 is formed by using the original first full bridge circuit 131 and second full bridge circuit 132 in the automobile, so as to perform direct-current to alternating-current conversion on the first bleeder current and output the second bleeder current, thereby avoiding adding additional bleeder circuits, improving the bleeder speed, reducing the circuit complexity of the active bleeder system, and reducing the circuit cost.

In an embodiment, as shown in fig. 1, the first full-bridge circuit 131 includes N first single-phase bridge arms, each of the first single-phase bridge arms includes a first upper bridge switching tube and a first lower bridge switching tube connected in series, first ends of the N first upper bridge switching tubes are commonly connected to form a first connection end of the first full-bridge circuit 131, second ends of the N first lower bridge switching tubes are commonly connected to form a second connection end of the first full-bridge circuit 131, and a connection node between the first upper bridge switching tube and the first lower bridge switching tube is a charging connection end of the first full-bridge circuit 131; the second full-bridge circuit 132 includes N second single-phase bridge arms, each of which includes a second upper bridge switching tube and a second lower bridge switching tube connected in series, first ends of the N second upper bridge switching tubes are commonly connected to form a first connection end of the second full-bridge circuit 132, second ends of the N second lower bridge switching tubes are commonly connected to form a second connection end of the second full-bridge circuit 132, and a connection node between the first upper bridge switching tube and the second lower bridge switching tube is a charging connection end of the second full-bridge circuit 132; any one of the N first single-phase bridge arms and any one of the N second single-phase bridge arms form an H bridge arm circuit 13, wherein N is more than or equal to 1.

Preferably, the first upper bridge switching transistor, the first lower bridge switching transistor, the second upper bridge switching transistor and the second lower bridge switching transistor are field effect transistors. The first upper bridge switching tube, the first lower bridge switching tube, the second upper bridge switching tube and the second lower bridge switching tube are provided with a first end serving as a source electrode, a second end serving as a grid electrode and a third end serving as a control end.

As an example, the first full-bridge circuit 131 includes N first single-phase bridge arms, each of which includes a first upper bridge switching tube and a first lower bridge switching tube connected in series, sources of the N first upper bridge switching tubes are commonly connected to form a first connection end of the first full-bridge circuit 131, drains of the N first lower bridge switching tubes are commonly connected to form a second connection end of the first full-bridge circuit 131, and a connection node between the first upper bridge switching tube and the first lower bridge switching tube is a charging connection end of the first full-bridge circuit 131; the second full-bridge circuit 132 includes N second single-phase bridge arms, each of which includes a second upper bridge switching tube and a second lower bridge switching tube connected in series, sources of the N second upper bridge switching tubes are commonly connected to form a first connection end of the second full-bridge circuit 132, drains of the N second lower bridge switching tubes are commonly connected to form a second connection end of the second full-bridge circuit 132, and a connection node between the first upper bridge switching tube and the second lower bridge switching tube is a charging connection end of the second full-bridge circuit 132. In this example, the H-bridge arm circuit 13 is formed by multiplexing the power devices in the original first full-bridge circuit 131 and the second full-bridge circuit 132 in the automobile, so that the active bleeder function is realized, the addition of an additional bleeder circuit is avoided, the circuit complexity of the active bleeder system is reduced, and the circuit cost is reduced.

In this example, the first full-bridge circuit 131 includes N first single-phase bridge arms, the second full-bridge circuit 132 includes N second single-phase bridge arms, and by making N be greater than or equal to 1, power devices in the first full-bridge circuit 131 and the second full-bridge circuit 132 can be multiplexed to form the H-bridge arm circuit 13, so that an additional bleeder circuit is avoided, and the circuit complexity of the active bleeder system is reduced.

In one embodiment, as shown in fig. 2, the active bleeder system further comprises a control module 17, wherein the control module 17 is respectively connected to the first full-bridge circuit 131 and the second full-bridge circuit 132, and is used for controlling the switching tubes in the first full-bridge circuit 131 and the second full-bridge circuit 132 to work.

As an example, the control module 17 is connected to the gate of the first upper bridge switching tube, the gate of the first lower bridge switching tube, the gate of the second upper bridge switching tube, and the gate of the second lower bridge switching tube, respectively, and is configured to control on or off of the first upper bridge switching tube, the first lower bridge switching tube, the second upper bridge switching tube, and the second lower bridge switching tube.

As an example, as shown in fig. 2, the control module 17 is configured to control the working condition change-over switch S8 to be turned on and control the first upper bridge switching tube, the first lower bridge switching tube, the second upper bridge switching tube and the second lower bridge switching tube in the H bridge arm circuit 13 to work when the bus capacitor is in the discharging working condition, so as to form a discharging loop; when the bus capacitor is not in the discharging working condition, the control working condition change-over switch S8 is turned off, and the N first upper bridge switching tubes and the N first lower bridge switching tubes are controlled to work to form a motor control loop, and the N second upper bridge switching tubes and the N second lower bridge switching tubes are controlled to work to form a generator control loop.

Illustratively, the first full-bridge circuit 131 includes 3 first single-phase legs, and the second full-bridge circuit 132 includes 3 second single-phase legs. When the bus capacitor is in the discharging working condition, the working condition change-over switch S8 is controlled to be conducted, the first upper bridge switching tube and the first lower bridge switching tube in any one of the 3 first single-phase bridge arms are controlled to be conducted, and the second upper bridge switching tube and the second lower bridge switching tube in any one of the 3 second single-phase bridge arms are controlled to be conducted, so that an H bridge arm circuit 13 is formed, an additional discharging circuit is prevented from being added, and the circuit complexity of an active discharging system is reduced. Meanwhile, when the bus capacitor is in the discharging working condition, the motor and the generator in the automobile are not in the working state, so that the first upper bridge switching tubes and the first lower bridge switching tubes of the other 2 first single-phase bridge arms in the first full-bridge circuit 131 are controlled to be disconnected, and the second upper bridge switching tubes and the second lower bridge switching tubes of the other 2 second single-phase bridge arms in the second full-bridge circuit 132 are controlled to be disconnected.

When the bus capacitor is not in the discharging working condition, the control module 17 controls the working condition change-over switch S8 to be turned off, and controls the N first upper bridge switching tubes and the N first lower bridge switching tubes to be turned on, so that a motor control loop is formed, and the motor works normally; and controlling the N second upper bridge switching tubes and the N second lower bridge switching tubes to work to form a generator control loop, and enabling the generator to work normally.

In this embodiment, the control module 17 is respectively connected to the working condition switch S8, the first full-bridge circuit 131 and the second full-bridge circuit 132, so as to control the working condition switch S8, the switching tubes in the first full-bridge circuit 131 and the second full-bridge circuit 132 to work, and realize active release and normal control of the original functions of the two full-bridge circuits.

In one embodiment, as shown in fig. 1, the charging circuit module 14 includes a transformer circuit 141 and an energy storage battery circuit 142; the transformer circuit 141 is connected to the H-bridge arm circuit 13, and is configured to receive the second bleed current output by the H-bridge arm circuit 13, and output a third bleed current; the energy storage battery circuit 142 is connected to the transformer circuit 141 and is used for storing energy corresponding to the third discharging current.

The third bleed current is a signal obtained after the second bleed current is converted. The third bleed current is an alternating current.

As an example, the transformer circuit 141 is connected to the H-bridge arm circuit 13, and is configured to receive the second bleed current output by the H-bridge arm circuit 13 and output the third bleed current. In this example, the transformer circuit 141 receives the second bleed current output from the H-arm circuit 13, converts the second bleed current, and outputs a third bleed current of an appropriate magnitude.

As another example, the transformer circuit 141 includes a transformer T1, a second filter capacitor C5, and a third power inductance L4. The H-bridge arm circuit 13 includes a first full-bridge circuit 131, a second full-bridge circuit 132, and a duty change-over switch S8. The first input end of the transformer circuit 141 is connected to the charging connection end of the first full-bridge circuit 131 through the third power inductor L4, the second input end of the transformer circuit 141 is connected to the charging connection end of the second full-bridge circuit 132 through the second filter capacitor C5, and the operating mode switching switch S8 is disposed between the charging connection end of the first full-bridge circuit 131 and the first input end of the transformer circuit 141 or between the charging connection end of the second full-bridge circuit 132 and the second input end of the transformer circuit 141. For example, the second bleed current may be converted to a third bleed current of a suitable magnitude by adjusting the turns ratio of the transformer T1.

As an example, the energy storage battery circuit 142 is connected to the transformer circuit 141 and is configured to store energy corresponding to the third leakage current. In the present embodiment, the transformer circuit 141 converts the second bleed current into a third bleed current with a suitable magnitude, so that the energy storage battery circuit 142 stores energy corresponding to the third bleed current, thereby implementing active bleed.

In this embodiment, the charging circuit module 14 includes a transformer circuit 141 and an energy storage battery circuit 142, and by connecting the transformer circuit 141 to the H-bridge arm circuit 13 and connecting the energy storage battery circuit 142 to the transformer circuit 141, the second bleed current output by the H-bridge arm circuit 13 can be converted into the third bleed current, and the energy corresponding to the third bleed current is stored by the energy storage battery circuit 142, thereby realizing active bleed.

In one embodiment, as shown in fig. 1, the energy storage battery circuit 142 includes a first diode D1, a second diode D2, a first filter capacitor C6, and an energy storage battery BAT2; the anode of the first diode D1 is connected to the first output terminal of the transformer circuit 141, and the cathode of the first diode D1 is connected to the positive electrode of the energy storage battery BAT2; an anode of the second diode D2 is connected to the second output terminal of the transformer circuit 141, and a cathode of the second diode D2 is connected to the positive electrode of the energy storage battery BAT2; the negative electrode of the energy storage battery BAT2 is connected with the third output end of the transformer circuit 141; the first end of the first filter capacitor C6 is connected with the positive electrode of the energy storage battery BAT2, and the second end of the first filter capacitor C6 is connected with the negative electrode of the energy storage battery BAT 2.

As an example, the anode of the first diode D1 is connected to the first output terminal of the transformer circuit 141, and the cathode of the first diode D1 is connected to the positive electrode of the energy storage battery BAT 2; the anode of the second diode D2 is connected to the second output terminal of the transformer circuit 141, the cathode of the second diode D2 is connected to the positive electrode of the energy storage battery BAT2, and the negative electrode of the energy storage battery BAT2 is connected to the third output terminal of the transformer circuit 141, so as to rectify the third bleed current (ac signal) output by the transformer circuit 141, that is, convert the third bleed current (ac signal) into a dc signal, thereby enabling the energy storage battery BAT2 to store the energy corresponding to the dc signal. Preferably, the voltage rating of the energy storage battery BAT2 is 12V.

As an example, the transformer T1 includes a primary winding and a first secondary winding; the first end of the primary winding is the first input of the transformer circuit 141, the second end of the primary winding is the second input of the transformer circuit 141, the first end of the first secondary winding is the first output of the transformer circuit 141, the second end of the first secondary winding is the second output of the transformer circuit 141, and the center tap of the first secondary winding is the third output of the transformer circuit 141.

As another example, a first end of the first filter capacitor C6 is connected to the positive electrode of the energy storage battery BAT2, and a second end of the first filter capacitor C6 is connected to the negative electrode of the energy storage battery BAT2, for performing a filtering process on the rectified dc signal.

In this embodiment, the energy storage battery circuit 142 includes a first diode D1, a second diode D2, a first filter capacitor C6 and an energy storage battery BAT2, where the anode of the first diode D1 is connected to the first output terminal of the transformer circuit 141, the cathode of the first diode D1 is connected to the anode of the energy storage battery BAT2, the anode of the second diode D2 is connected to the second output terminal of the transformer circuit 141, the cathode of the second diode D2 is connected to the anode of the energy storage battery BAT2, the cathode of the energy storage battery BAT2 is connected to the third output terminal of the transformer circuit 141, and the third discharging current is converted into direct current, so that the energy storage battery BAT2 stores energy corresponding to the direct current signal, thereby realizing active discharging.

In an embodiment, as shown in fig. 2, the charging circuit module 14 further includes a charging switch circuit 15, a first end of the charging switch circuit 15 is connected to a fourth output terminal of the transformer circuit 141, a second end of the charging switch circuit 15 is connected to a fifth output terminal of the transformer circuit 141, a third end of the charging switch circuit 15 is connected to an anode of the battery module 11, and a fourth end of the charging switch circuit 15 is connected to a cathode of the battery module 11.

As an example, the first terminal of the charging switch circuit 15 is connected to the fourth output terminal of the transformer circuit 141, the second terminal of the charging switch circuit 15 is connected to the fifth output terminal of the transformer circuit 141, the third terminal of the charging switch circuit 15 is connected to the positive electrode of the battery module 11, and the fourth terminal of the charging switch circuit 15 is connected to the negative electrode of the battery module 11. In this example, when the battery module 11 needs to be charged, the single-phase ac charging and the three-phase ac charging of the battery module 11 can be provided with a basis by controlling the charging switch circuit 15.

As an example, the battery module 11 includes a second main positive switch S2 and a second main negative switch S4. The third terminal of the charge switch circuit 15 is connected to the positive electrode of the battery module 11 through the second main positive switch S2. The fourth terminal of the charge switch circuit 15 is connected to the negative electrode of the battery module 11 through the second main negative switch S4.

As an example, the transformer T1 in the transformer circuit 141 further includes a second secondary winding, a first end of which is a fourth output terminal of the transformer circuit 141, and a second end of which is a fifth output terminal of the transformer circuit 141.

In one embodiment, as shown in fig. 2, the charging switch circuit 15 includes a first switch tube B1, a second switch tube B2, a third switch tube B3, and a fourth switch tube B4; the first switching tube B1 and the second switching tube B2 are connected in series, and a connection node between the first switching tube B1 and the second switching tube B2 forms a first end of the charging switching circuit 15; the third switching tube B3 is connected with the fourth switching tube B4, and a connection node between the third switching tube B3 and the fourth switching tube B4 forms a second end of the charging switching circuit 15; the first end of the first switching tube B1 and the first end of the third switching tube B3 are connected together to form a third end of the charging switching circuit 15; the second terminal of the second switching tube B2 and the second terminal of the fourth switching tube B4 are commonly connected to form a fourth terminal of the charging switching circuit 15.

As an example, the charging switch circuit 15 includes a first switch tube B1, a second switch tube B2, a third switch tube B3, and a fourth switch tube B4, where a second end of the first switch tube B1 is connected to a first end of the second switch tube B2, and a second end of the third switch tube B3 is connected to a first end of the fourth switch tube B4. The first end of the first switching tube B1 and the first end of the third switching tube B3 are commonly connected to serve as a third end of the charging switch circuit 15, the second end of the second switching tube B2 and the second end of the fourth switching tube B4 are commonly connected to serve as a fourth end of the charging switch circuit 15, a connection node of the first switching tube B1 and the second switching tube B2 serves as a second end of the charging switch circuit 15, and a connection node of the third switching tube B3 and the fourth switching tube B4 serves as a first end of the charging switch circuit 15. The charging switch circuit 15 further includes a third filter capacitor C3, one end of the third filter capacitor C3 is connected to the third end of the charging switch circuit 15, and the other end of the third filter capacitor C3 is connected to the fourth end of the charging switch circuit 15.

As an example, the transformer circuit 141 further includes a fourth filter capacitor C4 and a fourth power inductance L4. The first end of the charging switch circuit 15 is connected to the fourth output terminal of the transformer circuit 141 through the fourth power inductor L4, and the second end of the charging switch circuit 15 is connected to the fifth output terminal of the transformer circuit 141 through the fourth filter capacitor C4.

In this embodiment, by connecting the first end of the charging switch circuit 15 to the fourth output end of the transformer circuit 141, connecting the second end of the charging switch circuit 15 to the fifth output end of the transformer circuit 141, connecting the third end of the charging switch circuit 15 to the positive electrode of the battery module 11, and connecting the fourth end of the charging switch circuit 15 to the negative electrode of the battery module 11, when the battery module 11 needs to be charged, the charging switch circuit 15 can be controlled to provide a basis for single-phase ac charging and three-phase ac charging of the battery module 11.

In one embodiment, as shown in FIG. 2, the active bleed system further includes a charging interface module 16; the first end of the charging interface module 16 is connected with the positive electrode of the battery module 11, the second end of the charging interface module 16 is connected with the negative electrode of the battery module 11, and the third end of the charging interface module 16 is connected with the H bridge arm circuit 13.

As an example, a first end of the charging interface module 16 is connected to the positive electrode of the battery module 11, a second end of the charging interface module 16 is connected to the negative electrode of the battery module 11, and a third end of the charging interface module 16 is connected to the H-bridge arm circuit 13. In this example, the charging interface module 16 is used to connect an external charging source, which may be an ac power source or a dc power source, by connecting a first end of the charging interface module 16 to the positive pole of the battery module 11, connecting a second end of the charging interface module 16 to the negative pole of the battery module 11, and connecting a third end of the charging interface module 16 to the H-bridge arm circuit 13, single-phase ac charging and three-phase ac charging of the battery module 11 are achieved.

In this embodiment, the first end of the charging interface module 16 is connected to the positive electrode of the battery module 11, the second end of the charging interface module 16 is connected to the negative electrode of the battery module 11, and the third end of the charging interface module 16 is connected to the H-bridge arm circuit 13, so that single-phase ac charging and three-phase ac charging of the battery module 11 can be achieved.

In one embodiment, as shown in fig. 2, the charging interface module 16 includes a direct current charging loop DC, an alternating current charging loop AC, a second switch S5, a third switch S6, and a fourth switch S7; the positive electrode of the direct current charging loop DC is connected with the positive electrode of the battery module 11 through the second switch S5, and the negative electrode of the direct current charging loop DC is connected with the negative electrode of the battery module 11 through the third switch S6; the L pole of the AC charging circuit AC is connected to the positive electrode of the battery module 11 through the second switch S5, and the N pole of the AC charging circuit AC is connected to the H-arm circuit 13 through the fourth switch S7.

As an example, the positive electrode of the direct current charging circuit DC is connected to the positive electrode of the battery module 11 through the second switch S5, and the negative electrode of the direct current charging circuit DC is connected to the negative electrode of the battery module 11 through the third switch S6; the L pole of the AC charging circuit AC is connected to the positive pole of the battery module 11 through the second switch S5, the N pole of the AC charging circuit AC is connected to the H bridge arm circuit 13 through the fourth switch S7, wherein the positive pole of the DC charging circuit DC is the first end of the charging interface module 16, the negative pole of the DC charging circuit DC is the second end of the charging interface module 16, and the N pole of the AC charging circuit AC is the third end of the charging interface module 16.

As an example, a second fuse F2 is further provided between the second switch S5 and the positive electrode of the battery module 11.

In the present embodiment, by reasonably controlling the second switch S5, the third switch S6, and the fourth switch S7, the battery module 11 can be charged by selecting the direct current charging method or the alternating current charging method.

The present embodiment provides a vehicle including the active vent system of the above embodiments. The active discharging system comprises a bus capacitor, a DCDC module 12, an H bridge arm circuit 13 and a charging circuit module 14, wherein the DCDC module 12 is connected with the bus capacitor, the H bridge arm circuit 13 is connected with the DCDC module 12 and the bus capacitor, the charging circuit module 14 is connected with the H bridge arm circuit 13, when the bus capacitor is in a discharging working condition, the DCDC module 12 can output energy stored in the bus capacitor in a form of first discharging current, the H bridge arm circuit 13 is adopted to conduct direct current to alternating current, and output second discharging current, so that the charging circuit module 14 can store energy corresponding to the second discharging current after receiving the second discharging current output by the H bridge arm circuit 13, the active discharging speed of an automobile is greatly improved, the original bus capacitor, the DCDC module 12, the H bridge arm circuit 13 and the charging circuit module 14 of the automobile are utilized to realize the active discharging of the automobile, the circuit complexity of the active discharging system can be reduced, and the circuit cost is reduced.

The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.

Claims

1. An active discharge system is characterized by comprising a bus capacitor, a DCDC module, an H bridge arm circuit and a charging circuit module;

2. The active vent system of claim 1, wherein the bus capacitance comprises a first bus capacitance and a second bus capacitance;

3. The active bleed system of claim 2, wherein the H-bridge arm circuit comprises a first full-bridge circuit, a second full-bridge circuit, and a condition switching switch;

4. The active relief system of claim 3, wherein the first full-bridge circuit comprises N first single-phase legs, each of the first single-phase legs comprising a first upper bridge switching tube and a first lower bridge switching tube connected in series, first ends of the N first upper bridge switching tubes being commonly connected to form a first connection end of the first full-bridge circuit, second ends of the N first lower bridge switching tubes being commonly connected to form a second connection end of the first full-bridge circuit, a connection node between the first upper bridge switching tube and the first lower bridge switching tube being a charging connection end of the first full-bridge circuit;

5. The active vent system of claim 4, further comprising a control module coupled to the operating mode switch, the first full-bridge circuit, and the second full-bridge circuit for controlling operation of the operating mode switch, the switching tubes in the first full-bridge circuit, and the switching tubes in the second full-bridge circuit.

6. The active bleed system of claim 5, wherein the control module is configured to control the operating mode switch to be turned on and to control the first upper bridge switching tube, the first lower bridge switching tube, the second upper bridge switching tube, and the second lower bridge switching tube in the H-bridge arm circuit to operate when the bus capacitor is in a bleed operating mode, thereby forming a bleed loop; when the bus capacitor is not in a discharging working condition, the working condition change-over switch is turned off, and N first upper bridge switching tubes and N first lower bridge switching tubes are controlled to work to form a motor control loop, N second upper bridge switching tubes and N second lower bridge switching tubes are controlled to work to form a generator control loop.

7. The active vent system of claim 1, wherein the charging circuit module comprises a transformer circuit and an energy storage battery circuit;

8. The active vent system of claim 7, wherein the energy storage battery circuit comprises a first diode, a second diode, a first filter capacitor, and an energy storage battery;

9. The active vent system of claim 8, further comprising a battery module coupled to the first and second ends of the DCDC module;

10. The active vent system of claim 9, wherein the charge switching circuit comprises a first switching tube, a second switching tube, a third switching tube, and a fourth switching tube;

11. The active vent system of claim 9, wherein the active vent system further comprises a charging interface module; the first end of the charging interface module is connected with the positive electrode of the battery module, the second end of the charging interface module is connected with the negative electrode of the battery module, and the third end of the charging interface module is connected with the H bridge arm circuit.

12. The active vent system of claim 11, wherein the charging interface module comprises a direct current charging circuit, an alternating current charging circuit, a second switch, a third switch, and a fourth switch;

13. An automobile comprising the active vent system of any one of claims 1 to 12.