Power conversion circuits and vehicles

Abstract

A power conversion circuit and vehicle, belonging to the field of electronic circuit technology, have a first terminal and a second terminal. A conversion circuit connected between the first terminal and a first node converts the DC power input to the first terminal or the DC power input to the first node. A first switching circuit controls the connection or disconnection of the path between the first terminal and the second terminal. A second switching circuit controls the connection or disconnection of the path between the first node and the second terminal. An energy storage module connected to the first node provides energy storage DC power or charges the device based on the DC power input to the first node. Therefore, the flexibility, reliability, and safety of the power conversion circuit are improved.

Description

Technical Field

[0001] This application belongs to the field of electronic circuit technology, and in particular relates to a power conversion circuit and a vehicle. Background Technology

[0002] The relevant power conversion circuit includes a controller, a first power supply, and a second power supply. The controller is electrically connected to the first power supply, the second power supply, and multiple vehicle control units, respectively. The controller includes at least one first switch, which is connected in series in the connection line between the first power supply and the second power supply.

[0003] However, with the development of vehicle electronic architecture, the power conversion circuits based on single electronic switches are insufficient to meet the requirements of vehicle safety and high vehicle cost. Furthermore, because different vehicle manufacturers have different vehicle electronic architectures, their power distribution architectures also differ, making it difficult to standardize power distribution products and ensuring that related power conversion circuits cannot flexibly adapt to different vehicle electronic architectures.

[0004] Therefore, the related power conversion circuits have low flexibility, safety, and reliability. Utility Model Content

[0005] In view of the above problems, this application provides a power conversion circuit and a vehicle, which aims to solve the problems of low flexibility, safety and reliability of the related power conversion circuit.

[0006] In a first aspect, this application provides a power conversion circuit with a first terminal and a second terminal, comprising: A conversion circuit, connected to the first terminal and the first node, is used to convert the DC power connected to the first terminal or the DC power connected to the first node. A first switching circuit is connected to the first terminal and the second terminal, and is used to control the connection or disconnection of the path between the first terminal and the second terminal; The second switching circuit is connected to the first node and the second terminal, and is used to control the connection or disconnection of the path between the first node and the second terminal. An energy storage module is connected between the first node and the power ground to provide energy storage DC power to the first node, or to charge the first node based on the DC power supplied to it.

[0007] In the technical solution of this application embodiment, by setting a conversion circuit between the first node and the first terminal, setting a first switching circuit between the first terminal and the second terminal, and setting a second switching circuit between the first node and the second terminal, and connecting the energy storage module to the first node, electrical energy can flow flexibly between the first node, the first terminal and the second terminal, which can adapt to the electronic architecture of different application scenarios and improve the flexibility of the power conversion circuit; the circuit is simple and can realize the power supply and timely disconnection and isolation functions for power failure, thus improving the reliability and flexibility of the power conversion circuit.

[0008] In some embodiments, at least one of the first terminal and the second terminal is used to connect a load, a power supply, or an energy storage unit; The first terminal is used to connect to a first load, a first power source, or a first energy storage unit; The second terminal is used to connect to a second load, a second power source, or a second energy storage unit.

[0009] By adopting the above scheme, loads, power supplies or energy storage units can be connected to the first terminal and the second terminal respectively, thereby applying it to various scenarios and expanding the application range of power conversion circuits.

[0010] In some embodiments, it also includes: The control circuit is used to provide the first control signal and convert the control signal; The first switching circuit is specifically used to connect or disconnect the path between the first terminal and the second terminal based on the first control signal; The conversion circuit is specifically used to convert the DC power connected to the first terminal and the DC power connected to the first node based on the conversion control signal.

[0011] By adopting the above scheme and setting up the control circuit, it is possible to control the first switching circuit and the conversion circuit, thereby improving the reliability of the power conversion circuit.

[0012] In some embodiments, it also includes: The first sampling module is connected to the first switching circuit and the control circuit, and is used to detect the state of the first switching circuit so as to output a first sampling signal; The control circuit is specifically used to provide the conversion control signal and output the first control signal according to the first sampled signal.

[0013] By adopting the above scheme, the reliability of the power conversion circuit is improved by detecting the state of the first switching circuit and outputting a first control signal to control the first switching circuit based on the detection result.

[0014] In some embodiments, it also includes: The third sampling module is connected to the conversion circuit and the control circuit, and is used to detect the state of the conversion circuit so as to output the third sampling signal; The control circuit is specifically used to provide the first control signal and output the conversion control signal according to the third sampled signal.

[0015] By adopting the above scheme, the reliability of the power conversion circuit is improved by detecting the state of the conversion circuit and outputting the conversion control signal to control the conversion circuit based on the detection results.

[0016] In some embodiments, the first switching circuit includes: A first driving circuit is connected to the control circuit and is used to output a first driving signal according to the first control signal; A first switching transistor assembly, connected to the first driving circuit, is used to turn on or off the path between the first terminal and the second terminal based on the first driving signal.

[0017] By adopting the above scheme, the first control signal is converted into a first drive signal to drive the first switching transistor component, which adapts to the voltage range of the drive signal of the first switching transistor component in high-power application scenarios and improves the power of the power conversion circuit.

[0018] In some embodiments, it also includes: The second sampling module is connected to the energy storage module and is used to detect the state of the energy storage module in order to output a second sampling signal. A battery management circuit, connected to the second sampling module and the second switching circuit, is used to output a second control signal based on the second sampling signal, and to balance the individual cells in the energy storage module based on the second sampling signal. The second switching circuit is specifically used to connect or disconnect the path between the first node and the second terminal based on the second control signal.

[0019] By adopting the above scheme, the reliability of the power conversion circuit is improved by detecting the status of the energy storage module and outputting the second control signal of the second switching circuit based on the detection results.

[0020] In some embodiments, the battery management circuit is also connected to the control circuit; The battery management circuit is also used to output a first communication signal based on the second sampling signal; The control circuit is also used to output a second communication signal based on the first communication signal, so that the battery management circuit outputs the second control signal according to the second communication signal.

[0021] By adopting the above scheme, the more complex battery management control logic is placed on the control circuit side through communication between the battery management circuit and the control circuit, which reduces the configuration of the battery management circuit and saves hardware costs.

[0022] In some embodiments, the second switching circuit includes: The second driving circuit is connected to the battery management circuit and is used to output a second driving signal according to the second control signal. The second switching transistor assembly, connected to the second driving circuit, is used to turn on or off the path between the first node and the second terminal based on the second driving signal.

[0023] By adopting the above scheme, the second control signal is converted into a second drive signal to drive the second switching transistor component, which adapts to the voltage range of the drive signal of the second switching transistor component in high-power application scenarios and improves the power of the power conversion circuit.

[0024] Secondly, this utility model embodiment also provides a vehicle, the vehicle including the above-described power conversion circuit.

[0025] By adopting the above solutions, since the vehicle includes power conversion circuits based on any of the above solutions, the flexibility, safety, and reliability of the power conversion circuits can be improved, and they can be applied to high-power scenarios.

[0026] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0027] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of a power conversion circuit provided in an embodiment of this application; Figure 2 A schematic diagram of another structure of the power conversion circuit provided in one embodiment of this application; Figure 3 A schematic diagram of another structure of the power conversion circuit provided in one embodiment of this application; Figure 4 A schematic diagram of another structure of the power conversion circuit provided in one embodiment of this application; Figure 5 A schematic diagram of another structure of the power conversion circuit provided in one embodiment of this application; Figure 6 A schematic diagram of another structure of the power conversion circuit provided in one embodiment of this application; Figure 7 A schematic diagram of another structure of the power conversion circuit provided in one embodiment of this application; Figure 8 A schematic diagram of another structure of the power conversion circuit provided in one embodiment of this application; Figure 9 A schematic diagram of a first switching circuit in a power conversion circuit provided in an embodiment of this application; Figure 10 This is a schematic diagram illustrating a portion of the circuit of the first switching transistor assembly in a power conversion circuit according to an embodiment of this application. Figure 11 A schematic diagram illustrating another portion of the circuit of the first switching transistor assembly in a power conversion circuit provided in an embodiment of this application; Figure 12 A schematic diagram of another structure of the power conversion circuit provided in one embodiment of this application; Figure 13 This is a schematic diagram of a second switching circuit in a power conversion circuit provided in an embodiment of this application. Detailed Implementation

[0028] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0030] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0031] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0033] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0034] Currently, judging from market trends, the application of power conversion circuits is becoming increasingly widespread. Power conversion is widely used in various fields, including electric bicycles, motorcycles, automobiles, military equipment, and aerospace. As the application areas of power conversion continue to expand, the market demand is also constantly increasing.

[0035] To address the issues of poor flexibility, reliability, and security, the applicant discovered that the positive terminal of the energy storage circuit can be used as the first node. In the design, a conversion circuit is set between the first node and the first terminal, a first switching circuit is set between the first terminal and the second terminal, and a second switching circuit is set between the first node and the second terminal. This allows electrical energy to flow flexibly between the first node, the first terminal, and the second terminal, improving the flexibility of the power conversion circuit. The circuit architecture is simple, which improves the reliability and flexibility of the power conversion circuit.

[0036] The power conversion circuit disclosed in this application can be used in electrical devices. These devices can be, but are not limited to, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0037] According to some embodiments of this application, refer to Figure 1 , Figure 1A schematic diagram of a power conversion circuit according to an embodiment of this application is shown. For ease of explanation, only the parts relevant to this embodiment are shown, and are described in detail below: The aforementioned power conversion circuit has a first terminal A and a second terminal B, and includes a conversion circuit 10, a first switching circuit 20, a second switching circuit 30, and an energy storage module 40.

[0038] The conversion circuit 10 is connected to the first terminal A and the first node X, and is used to convert the DC power connected to the first terminal A or the DC power connected to the first node X. The first switching circuit 20 is connected to the first terminal A and the second terminal B, and is used to control the connection or disconnection of the passage between the first terminal A and the second terminal B. The second switching circuit 30 is connected to the first node X and the second terminal B, and is used to control the connection or disconnection of the path between the first node X and the second terminal B. The energy storage module 40 is connected between the first node X and the power ground, and is used to provide energy storage DC power or to charge based on the DC power connected to the first node X.

[0039] It is understood that both the first switching circuit 20 and the second switching circuit 30 may include a switching transistor. The energy storage module 40 includes a battery, which may be a lithium battery. The conversion circuit 10 may be a DC-DC converter circuit.

[0040] It should be noted that when the voltage of the first terminal A is greater than the voltage of the first node X and the voltage of the second terminal B, the DC power connected to the first terminal A discharges the energy storage module 40 and / or the second terminal B; the DC power connected to the first terminal A can discharge the energy storage module 40 through the conversion circuit 10 or through the first switch circuit 20 and the second switch circuit 30; it can also discharge the second terminal B through the conversion circuit 10 and the first node X, or through the first switch circuit 20.

[0041] When the voltage at the second terminal B is greater than the voltage at the first node X and the voltage at the first terminal A, the DC current connected to the second terminal B discharges the energy storage module 40 and / or the first terminal A; the DC current connected to the second terminal B can discharge the energy storage module 40 through the second switching circuit 30, or through the first switching circuit 20 and the conversion circuit 10; it can also discharge the first terminal A through the first switching module 20.

[0042] When the voltage at the first node X is greater than the voltage at the first terminal A and the voltage at the second terminal B, the DC power output by the energy storage module 40 discharges the first terminal A and / or the second terminal B. The DC power output by the energy storage module 40 can discharge the second terminal B through the second switch module 30, or through the first switch circuit 20 and the conversion circuit 10. Alternatively, it can discharge the first terminal A through the conversion circuit 10, or through the first switch circuit 20 and the second switch circuit 30.

[0043] In the technical solution of this application embodiment, by setting a conversion circuit 10 between the first node X and the first terminal A, setting a first switching circuit 20 between the first terminal A and the second terminal B, setting a second switching circuit 30 between the first node X and the second terminal B, and connecting the energy storage module 40 to the first node X, electrical energy can flow flexibly between the first node X, the first terminal A and the second terminal B, which can adapt to the electronic architecture of different application scenarios and improve the flexibility of the power conversion circuit; the circuit is simple and can realize the power supply and timely disconnection and isolation functions for power failure, thus improving the reliability and flexibility of the power conversion circuit.

[0044] According to some embodiments of this application, optionally, at least one of the first terminal and the second terminal is used to connect a load, a power supply, or an energy storage unit. Specifically, the first terminal A can be used to connect a first load 91, a first power supply 92, or a first energy storage unit 93. The second terminal B can be used to connect a second load 81, a second power supply 82, or a second energy storage unit 83.

[0045] As an example rather than a limitation, such as Figure 2 As shown, the first terminal A is connected to the first power supply 92, and the second terminal B is connected to the second energy storage unit 83. At this time, the first power supply 92 can discharge to the energy storage module 40 and / or the second energy storage unit 83, or allow electrical energy to flow between the energy storage module 40 and the second energy storage unit 83. When the first power supply 92 can discharge to the energy storage module 40 and / or the second energy storage unit 83, the transformer circuit converts the DC power output from the first power supply 92 (the DC power connected to the first terminal A) and outputs the converted DC power from the first power supply 92 to the positive terminal of the energy storage module 40 to charge the energy storage module 40. The first switching circuit 20 transmits the DC power output from the first power supply 92 to the second energy storage unit 83 to charge the second energy storage unit 83. When electrical energy flows between the energy storage module 40 and the second energy storage unit 83, the second switching circuit 30 is turned on to transmit electrical energy.

[0046] As an example rather than a limitation, such as Figure 3As shown, the first terminal A is connected to the first power supply 92, and the second terminal B is connected to the second power supply 82. At this time, the first power supply 92 or the second power supply 82 can discharge to the energy storage module 40. When the first power supply 92 discharges to the energy storage module 40, the transformer circuit converts the DC power output from the first power supply 92 (the DC power connected to the first terminal A) and outputs the converted DC power output from the first power supply 92 to the positive terminal of the energy storage module 40 to charge the energy storage module 40. When the second power supply 82 discharges to the energy storage module 40, the second switching circuit 30 transmits the DC power output from the second power supply 82 (the DC power connected to the second terminal B) to the positive terminal of the energy storage module 40 to charge the energy storage module 40.

[0047] As an example rather than a limitation, such as Figure 4 As shown, the first terminal A is connected to the first energy storage unit 93, and the second terminal B is connected to the second power supply 82. At this time, the second power supply 82 can discharge to the energy storage module 40 and / or the first energy storage unit 93, or allow electrical energy to flow between the energy storage module 40 and the second energy storage unit 83. When the second power supply 82 can discharge to the energy storage module 40 and / or the first energy storage unit 93, the second switching circuit 30 transmits the DC power output from the second power supply 82 (the DC power connected to the second terminal B) to the positive terminal of the energy storage module 40 to charge it; the first switching circuit 20 transmits the DC power output from the second power supply 82 (the DC power connected to the second terminal B) to the positive terminal of the first energy storage unit 93 to charge it. When electrical energy flows between the energy storage module 40 and the second energy storage unit 83, the second switching circuit 30 is turned on to transmit electrical energy.

[0048] As an example rather than a limitation, such as Figure 5 As shown, the first terminal A is connected to the first load 91, and the second terminal B is connected to the second load 81. In this case, the energy storage module 40 can discharge to the first load 91 and / or the second load 81. In the first case, the first switching circuit 20 and the second switching circuit 30 are turned on to transmit the stored DC power output by the energy storage module 40 to the first load 91. Simultaneously, the second switching circuit 30 is turned on to transmit the stored DC power output by the energy storage module 40 to the second load 81. In the second case, the transformer circuit converts the stored DC power output by the energy storage module 40 (the DC power connected to the first node X) to output the converted stored DC power to the first load 91. In the third case, the second switching circuit 30 is turned on to transmit the stored DC power output by the energy storage module 40 to the second load 81.

[0049] By adopting the above scheme, a load, power supply or energy storage unit can be connected to the first terminal A and the second terminal B respectively, thereby applying it to various scenarios and expanding the application range of power conversion circuits.

[0050] According to some embodiments of this application, optionally, please continue to refer to Figure 6 , Figure 6 A schematic diagram of a power conversion circuit according to another embodiment of this application is shown. For ease of explanation, only the parts relevant to this embodiment are shown, and are described in detail below: The above power conversion circuit, except for Figure 1 In addition to all the components and assemblies shown in the power conversion circuit, the power conversion circuit also includes a control circuit 50.

[0051] Control circuit 50 is used to provide a first control signal and a conversion control signal; The first switching circuit 20 is specifically used to connect or disconnect the path between the first terminal A and the second terminal B based on the first control signal. The conversion circuit 10 is specifically used to convert the DC power connected to the first terminal A and the DC power connected to the first node X based on the conversion control signal.

[0052] It is understood that the control circuit 50 may include a microprocessor.

[0053] By adopting the above scheme and setting up the control circuit 50, it is possible to control the first switching circuit 20 and the conversion circuit 10, thereby improving the reliability of the power conversion circuit.

[0054] According to some embodiments of this application, optionally, please continue to refer to Figure 7 , Figure 7 A schematic diagram of a power conversion circuit according to another embodiment of this application is shown. For ease of explanation, only the parts relevant to this embodiment are shown, and are described in detail below: The above power conversion circuit, except for Figure 6 In addition to all the components and parts of the power conversion circuit shown, the power conversion circuit also includes a first sampling module 51.

[0055] The first sampling module 51 is connected to the first switching circuit 20 and the control circuit 50, and is used to detect the state of the first switching circuit 20 so as to output the first sampling signal; The control circuit 50 is specifically used to provide a conversion control signal and output a first control signal according to the first sampled signal.

[0056] In one embodiment, the sampling module 51 includes a temperature sampling module, a current sampling module, and a voltage sampling module.

[0057] The first temperature sampling module is connected to the control circuit 50 and is used to detect the temperature of the first switching circuit 20 to output the first temperature sampling signal. The first current sampling module is connected to the first switching circuit 20 and the control circuit 50, and is used to detect the current transmitted by the first switching circuit 20 to output the first current sampling signal. The first voltage sampling module is connected to the first switching circuit 20 and the control circuit 50, and is used to detect the voltage connected to the first switching circuit 20 so as to output the first voltage sampling signal. The control circuit 50 is specifically used to provide a conversion control signal and output a first control signal based on the first temperature sampling signal, the first current sampling signal, and the first voltage sampling signal. In a specific implementation, the control circuit 50 outputs the first control signal when the temperature of the first switching circuit 20 is lower than a first preset temperature, the current transmitted by the first switching circuit 20 is lower than a first preset current, and the voltage connected to the first switching circuit 20 is within a first voltage range.

[0058] By adopting the above scheme, the reliability of the power conversion circuit is improved by detecting the state of the first switching circuit 20 and outputting a first control signal to control the first switching circuit 20 based on the detection result.

[0059] According to some embodiments of this application, optionally, please continue to refer to Figure 8 , Figure 4 A schematic diagram of a power conversion circuit according to another embodiment of this application is shown. For ease of explanation, only the parts relevant to this embodiment are shown, and are described in detail below: The above power conversion circuit, except for Figure 6 In addition to all the components and parts of the power conversion circuit shown, the power conversion circuit also includes a third sampling module 52.

[0060] The third sampling module is connected to the conversion circuit 10 and the control circuit 50, and is used to detect the state of the conversion circuit 10 in order to output the third sampling signal. The control circuit 50 is specifically used to provide a first control signal and output a conversion control signal according to the third sampled signal.

[0061] In one embodiment, the sampling circuit 52 includes a third temperature sampling module, a third current sampling module, and a third voltage sampling module; The third temperature sampling module is connected to the control circuit 50 and is used to detect the temperature of the conversion circuit 10 in order to output the third temperature sampling signal. The third current sampling module is connected to the conversion circuit 10 and the control circuit 50. It is used to detect the input current of the conversion circuit 10 and output the third current sampling signal. The third voltage sampling module is connected to the conversion circuit 10 and the control circuit 50. It is used to detect the input voltage of the conversion circuit 10 and output the third voltage sampling signal. The control circuit 50 is specifically used to provide a first control signal and output a conversion control signal based on the third temperature sampling signal, the third current sampling signal, and the third voltage sampling signal. In a specific implementation, the control circuit 50 outputs the conversion control signal when the temperature of the conversion circuit 10 is less than a third preset temperature, the input current of the conversion circuit 10 is less than a third preset current, and the input voltage of the conversion circuit 10 is within a third voltage range.

[0062] By adopting the above scheme, the reliability of the power conversion circuit is improved by detecting the state of the conversion circuit 10 and outputting a conversion control signal to control the conversion circuit 10 based on the detection result.

[0063] In some embodiments, optionally, please continue to refer to Figure 9 The first switching circuit 20 includes a first driving circuit 21 and a first switching transistor assembly 22.

[0064] The first driving circuit 21 is connected to the control circuit 50 and is used to output a first driving signal according to the first control signal. The first switching transistor assembly 22 is connected to the first driving circuit 21 and is used to turn on or off the path between the first terminal A and the second terminal B based on the first driving signal.

[0065] It is understandable that, such as Figure 10 As shown, the first switching transistor assembly 22 may include at least one first switching transistor module connected in parallel, wherein the first switching transistor module includes switching transistors connected back to back.

[0066] The first switching transistor assembly 22 can also be as follows: Figure 11 As shown, it includes at least one second switching transistor module connected in series. The second switching transistor module includes 2n switching transistors, with the first to the nth switching transistors and the (n+1)th to the 2nth switching transistors connected back-to-back, where n is a positive integer.

[0067] By adopting the above scheme, the first control signal is converted into a first drive signal to drive the first switching transistor component 22, which adapts to the voltage range of the drive signal of the first switching transistor component 22 in high-power application scenarios and improves the power of the power conversion circuit.

[0068] According to some embodiments of this application, optionally, please continue to refer to Figure 12 , Figure 12 A schematic diagram of a power conversion circuit according to another embodiment of this application is shown. For ease of explanation, only the parts relevant to this embodiment are shown, and are described in detail below: The above power conversion circuit, except for Figure 6In addition to all the components and parts of the power conversion circuit shown, the power conversion circuit also includes a second sampling module 61 and a battery management circuit 60.

[0069] The second sampling module 61 is connected to the energy storage module 40 and is used to detect the state of the energy storage module 40 in order to output a second sampling signal. The battery management circuit 60 is connected to the second sampling module 61 and the second switching circuit 30, and is used to output a second control signal based on the second sampling signal, and to balance the individual cells in the energy storage module 40 based on the second sampling signal. The second switching circuit 30 is specifically used to connect or disconnect the path between the first node X and the second terminal B based on the second control signal.

[0070] In one embodiment, the second sampling module 61 includes a second temperature sampling module, a second current sampling module, and a second voltage sampling module.

[0071] The second temperature sampling module is connected to the battery management circuit 60 and is used to detect the temperature of the energy storage module 40 to output a second temperature sampling signal. The second current sampling module is connected to the energy storage module 40 and the battery management circuit 60. It is used to detect the current output by the energy storage module 40 and output a second current sampling signal. The second voltage sampling module is connected to the energy storage module 40 and the battery management circuit 60. It is used to detect the voltage output by the energy storage module 40 to output a second voltage sampling signal, and to detect the voltage of each cell in the energy storage module 40 to output a cell detection signal. The battery management circuit 60 is specifically used to output a second control signal based on a second temperature sampling signal, a second current sampling signal and a third voltage sampling signal, and to balance each cell in the energy storage module 40 based on the cell detection signal. By adopting the above scheme, the battery management function is realized by detecting the state of the energy storage module 40 and outputting the second control signal of the second switching circuit 30 according to the detection result, thereby improving the reliability of the power conversion circuit.

[0072] In some embodiments, optionally, please continue to refer to Figure 12 The battery management circuit 60 is also connected to the control circuit 50; The battery management circuit 60 is also used to output a first communication signal based on the second sampling signal; The control circuit 50 is also used to output a second communication signal based on the first communication signal, so that the battery management circuit 60 outputs a second control signal according to the second communication signal.

[0073] It is understood that both the second sampling signal and the first communication signal carry the status information of the energy storage module 40, including temperature, current, and voltage information. The control circuit 50 is also used to output the second communication signal based on the status information of the energy storage module 40, so that the battery management circuit 60 outputs the second control signal according to the second communication signal.

[0074] It should be noted that the control circuit 50 is also used to output a first control signal and a conversion control signal based on the first communication signal. This allows the first switching circuit 20 and the conversion circuit 10 to be controlled according to the state of the energy storage module 40, further improving the reliability of the circuit conversion circuit.

[0075] By adopting the above scheme, the more complex battery management control logic is placed on the control circuit 50 side through communication between the battery management circuit 60 and the control circuit 50, which reduces the configuration of the battery management circuit 60 and saves hardware costs.

[0076] In some embodiments, optionally, please refer to Figure 13 The second switching circuit 30 includes a second driving circuit 31 and a second switching transistor assembly 32.

[0077] The second drive circuit 31 is connected to the battery management circuit 60 and is used to output a second drive signal according to the second control signal. The second switching transistor assembly 32 is connected to the second driving circuit 31 and is used to turn on or off the path between the first node X and the second terminal B based on the second driving signal.

[0078] It is understood that the second switch assembly 32 may include at least one third switch module connected in parallel, wherein the third switch module includes switches connected back to back.

[0079] The second switching transistor assembly 32 may also include at least one fourth switching transistor module connected in series. The second switching transistor module includes 2m switching transistors, with the first to the mth switching transistors and the (m+1)th to the 2mth switching transistors connected back-to-back, where m is a positive integer.

[0080] By adopting the above scheme, the second control signal is converted into a second drive signal to drive the second switching transistor assembly 32, which adapts to the voltage range of the drive signal of the second switching transistor assembly 32 in high-power application scenarios and improves the power of the power conversion circuit.

[0081] According to some embodiments of this application, this application also provides a vehicle including a power conversion circuit of any of the above schemes.

[0082] Since the vehicle includes power conversion circuits based on any of the above solutions, the flexibility, safety, and reliability of the power conversion circuits are improved, and it can be applied to high-power scenarios.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A power conversion circuit, characterized in that, Having a first terminal and a second terminal, including: A conversion circuit, connected to the first terminal and the first node, is used to convert the DC power connected to the first terminal or the DC power connected to the first node. A first switching circuit is connected to the first terminal and the second terminal, and is used to control the connection or disconnection of the path between the first terminal and the second terminal; The second switching circuit is connected to the first node and the second terminal, and is used to control the connection or disconnection of the path between the first node and the second terminal. An energy storage module is connected between the first node and the power ground to provide energy storage DC power to the first node, or to charge the first node based on the DC power supplied to it.

2. The power conversion circuit as described in claim 1, characterized in that, At least one of the first terminal and the second terminal is used to connect a load, a power supply, or an energy storage unit; The first terminal is used to connect to a first load, a first power source, or a first energy storage unit; The second terminal is used to connect to a second load, a second power source, or a second energy storage unit.

3. The power conversion circuit as described in claim 1, characterized in that, Also includes: The control circuit is used to provide the first control signal and convert the control signal; The first switching circuit is specifically used to connect or disconnect the path between the first terminal and the second terminal based on the first control signal; The conversion circuit is specifically used to convert the DC power connected to the first terminal and the DC power connected to the first node based on the conversion control signal.

4. The power conversion circuit as described in claim 3, characterized in that, Also includes: The first sampling module is connected to the first switching circuit and the control circuit, and is used to detect the state of the first switching circuit so as to output a first sampling signal; The control circuit is specifically used to provide the conversion control signal and output the first control signal according to the first sampled signal.

5. The power conversion circuit as described in claim 3, characterized in that, Also includes: The third sampling module is connected to the conversion circuit and the control circuit, and is used to detect the state of the conversion circuit so as to output the third sampling signal; The control circuit is specifically used to provide the first control signal and output the conversion control signal according to the third sampled signal.

6. The power conversion circuit as described in claim 3, characterized in that, The first switching circuit includes: A first driving circuit is connected to the control circuit and is used to output a first driving signal according to the first control signal; A first switching transistor assembly, connected to the first driving circuit, is used to turn on or off the path between the first terminal and the second terminal based on the first driving signal.

7. The power conversion circuit as described in claim 3, characterized in that, Also includes: The second sampling module is connected to the energy storage module and is used to detect the state of the energy storage module in order to output a second sampling signal. A battery management circuit, connected to the second sampling module and the second switching circuit, is used to output a second control signal based on the second sampling signal, and to balance the individual cells in the energy storage module based on the second sampling signal. The second switching circuit is specifically used to connect or disconnect the path between the first node and the second terminal based on the second control signal.

8. The power conversion circuit as described in claim 7, characterized in that, The battery management circuit is also connected to the control circuit; The battery management circuit is also used to output a first communication signal based on the second sampling signal; The control circuit is also used to output a second communication signal based on the first communication signal, so that the battery management circuit outputs the second control signal according to the second communication signal.

9. The power conversion circuit as described in claim 7, characterized in that, The second switching circuit includes: The second driving circuit is connected to the battery management circuit and is used to output a second driving signal according to the second control signal. The second switching transistor assembly, connected to the second driving circuit, is used to turn on or off the path between the first node and the second terminal based on the second driving signal.

10. A vehicle, characterized in that, The vehicle includes a power conversion circuit as described in any one of claims 1 to 9.

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