Charging and discharging circuits and power consumption devices

Abstract

This application discloses a charge / discharge circuit and a power consumption device. The charge / discharge circuit includes a power supply module, a first drive assembly, a second drive assembly, and a first switch module, wherein the first and second drive assemblies are connected in parallel between the positive and negative terminals of the power supply module, one end of the first switch module is connected to the first drive assembly, and the other end of the first switch module is connected to the second drive assembly. The charge / discharge circuit according to the embodiment of this application includes a first switch module, one end of the first switch module is connected to the first drive assembly, and the other end of the first switch module is connected to the second drive assembly, thereby enabling flexible changes in the circuit structure and realizing more functions by controlling the first switch module to switch the connection relationship between the first drive assembly and the second drive assembly.

Description

Technical Field

[0001] Cross - reference to related applications This application claims the priority and rights of a Chinese patent application with application number 202321328112.0 and title "Charge - discharge Circuit and Power - consuming Equipment", which was filed with the China National Intellectual Property Administration on May 29, 2023, and all of its content is incorporated into this application by reference.

[0002] This application relates to the field of battery technology, specifically to charge - discharge circuits and power - consuming equipment.

Background Art

[0003] Currently, new - energy transportation vehicles, such as electric vehicles, etc., have already widely adopted a dual - motor architecture. This dual - motor architecture includes two motors. The electrical energy released from the battery is converted into mechanical energy through the two motors, thereby driving the movement of new - energy transportation vehicles. In the dual - motor architecture in related technologies, the two motors are connected in parallel, the circuit connection method is fixed, and the function of driving a transportation vehicle to travel by the dual - motor can be realized by a single circuit structure, but the circuit structure cannot be flexibly changed to realize more functions.

[0004] The above description is only for providing background - technical information related to this application and does not necessarily constitute prior art.

Summary of the Invention

[0005] In view of the problem that the connection method of the dual motor architecture circuit present in the above-mentioned related technologies is fixed and the circuit structure cannot be flexibly changed to realize more functions, the embodiment of this application provides a charge / discharge circuit including a first switch module, one end of the first switch module is connected to a first drive assembly, and the other end of the first switch module is connected to a second drive assembly, thereby enabling flexible changes in the circuit structure and realizing more functions by controlling the first switch module to switch the connection relationship between the first drive assembly and the second drive assembly.

[0006] A first embodiment of the present invention provides a charge / discharge circuit including a power supply module, a first drive assembly, a second drive assembly, and a first switch module. The first drive assembly and the second drive assembly are connected in parallel between the positive and negative terminals of the power supply module. One end of the first switch module is connected to the first drive assembly, and the other end of the first switch module is connected to the second drive assembly.

[0007] The charge / discharge circuit according to the first embodiment includes a first switch module, one end of which is connected to the first drive assembly, and the other end of which is connected to the second drive assembly. By controlling the first switch module to switch the connection relationship between the first drive assembly and the second drive assembly, a flexible change in the circuit structure can be achieved, enabling a wider range of functions.

[0008] In some embodiments of this application, the first drive assembly includes a first motor, and the second drive assembly includes a second motor controller. The first drive assembly and the second drive assembly are connected in parallel between the positive and negative terminals of the power supply module. One end of the first switch module is connected to the neutral point of the first motor, and the other end of the first switch module is connected to the upper and lower bridge arm connection point of at least one bridge arm of the second motor controller.

[0009] One end of the first switch module is connected to the neutral point of the first motor, and the other end of the first switch module is connected to the upper and lower bridge arm connection point of at least one bridge arm of the second motor controller. By controlling the first switch module to switch the connection relationship between the first drive assembly and the second drive assembly, a flexible change in the circuit structure can be achieved, enabling more functionality.

[0010] In some embodiments of the present application, the first switch module includes a main switch and a plurality of sub-switches, the number of which is less than or equal to the number of bridge arms in the second motor controller, the first end of which is connected to the neutral point of which is which

[0011] The main switch controls the connection and disconnection between the first motor and the second motor controller, and multiple sub-switches allow for more flexible selection of the connection and disconnection of multiple bridge arms in the second motor controller. Closing the main switch and at least one sub-switch activates the battery self-heating mode, and controlling the main switch to turn it off activates the battery self-heating mode.

[0012] In some embodiments of the present application, the first switch module includes a plurality of subswitches, the number of which is equal to the number of bridge arms in the second motor controller, the first end of each subswitch is connected to the neutral point of the first motor, and the second end of each subswitch is connected in a one-to-one correspondence to the upper and lower bridge arm connection points of different bridge arms in the second motor controller.

[0013] Multiple sub-switches enable connection and disconnection between the first motor and multiple bridge arms of the second motor controller. Closing at least one sub-switch enters the battery self-heating mode, and controlling all sub-switches to disconnect them turns off the battery self-heating mode.

[0014] In some embodiments of this application, the power supply module includes a battery and a battery main control box, the battery main control box is equipped with a power supply side positive terminal connector, a drive side positive terminal connector, a power supply side negative terminal connector and a drive side negative terminal connector, A positive electrode circuit is connected between the positive electrode connector on the power supply side and the positive electrode connector on the drive side, and a negative electrode circuit is connected between the negative electrode connector on the power supply side and the negative electrode connector on the drive side. The positive terminal of the battery is connected to the positive terminal connector on the power supply side, and the negative terminal of the battery is connected to the negative terminal connector on the power supply side. The positive terminal connector on the drive side is connected to the first end of the first drive assembly and the first end of the second drive assembly, respectively. The negative terminal connector on the drive side is connected to the second end of the first drive assembly and the second end of the second drive assembly, respectively.

[0015] The battery main control box is equipped with a positive terminal connector for the power supply side, a positive terminal connector for the drive side, a negative terminal connector for the power supply side, and a negative terminal connector for the drive side. This allows for easy connection of the battery's positive and negative terminals to the battery main control box via wires, and also allows for easy connection of the first and second drive assemblies to the battery main control box, improving wiring convenience. The battery main control box enables control over the connection relationship between the battery and the first and second drive assemblies. In the event of a circuit malfunction, it can timely disconnect the connection between the battery and other components, thereby protecting the battery. The battery main control box can detect parameters such as the battery's current or voltage, contributing to more accurate circuit control, and can also determine whether a circuit malfunction has occurred based on the detected parameters.

[0016] In some embodiments of this application, a main positive switch and a current sensor are installed in the positive electrode circuit. The current sensor can detect the magnitude of the current flowing through the battery, which helps determine whether a fault has occurred in the circuit based on the detected current, and enables adjustments to several control flows based on the current.

[0017] In some embodiments of this application, the drive-side positive connector includes a first drive-side positive subconnector and a second drive-side positive subconnector, the first end of the positive circuit is connected to the power supply-side positive connector, and the second end of the positive circuit is connected to the first drive-side positive subconnector and the second drive-side positive subconnector, respectively. The first positive subconnector on the drive side is connected to the first end of the first drive assembly, and the second positive subconnector on the drive side is connected to the first end of the second drive assembly.

[0018] Thus, the first end of the first drive assembly and the first end of the second drive assembly are connected to different connectors, eliminating the need to bundle the conductors at the first end of the first drive assembly and the conductors at the first end of the second drive assembly together and connect them to the same connector, thus improving wiring convenience. Furthermore, in related technologies, the first drive assembly and the second drive assembly are connected to the same connector, and if this same connector fails, the operation of both drive assemblies is affected. By installing a first positive subconnector on the drive side and a second positive subconnector on the drive side, the situation in related technologies where the operation of the two drive assemblies is affected by the same connector can be improved, and the failure rate can be reduced.

[0019] In some embodiments of this application, the drive-side negative terminal connector includes a first drive-side negative terminal subconnector and a second drive-side negative terminal subconnector. The first end of the negative electrode circuit is connected to the negative electrode connector on the power supply side, and the second end of the negative electrode circuit is connected to the first negative electrode subconnector and the second negative electrode subconnector on the drive side, respectively. The first negative subconnector on the drive side is connected to the second end of the first drive assembly, and the second negative subconnector on the drive side is connected to the second end of the second drive assembly.

[0020] Thus, the second end of the first drive assembly and the second end of the second drive assembly are connected to different connectors, eliminating the need to bundle the conductors of the second end of the first drive assembly and the conductors of the second end of the second drive assembly together and connect them to the same connector, thus improving wiring convenience. Furthermore, in related technologies, the second end of the first drive assembly and the second end of the second drive assembly are connected to the same connector, and if this same connector fails, the operation of both drive assemblies is affected. In this embodiment, by installing a first negative subconnector on the drive side and a second negative subconnector on the drive side, the situation in related technologies where the operation of both drive assemblies is affected by the same connector can be improved, thereby reducing the failure rate.

[0021] In some embodiments of this application, the battery includes a first sub-battery and a second sub-battery, the power supply side positive electrode connector includes a power supply side first positive electrode sub-connector and a power supply side second positive electrode sub-connector, and the positive electrode circuit includes a first positive electrode branch circuit and a second positive electrode branch circuit. The first end of the first positive electrode branch circuit is connected to the first positive electrode subconnector on the power supply side, the first end of the second positive electrode branch circuit is connected to the second positive electrode subconnector on the power supply side, and both the second end of the first positive electrode branch circuit and the second end of the second positive electrode branch circuit are connected to the positive electrode connector on the drive side. The positive terminal of the first sub-battery is connected to the first positive terminal sub-connector on the power supply side, and the positive terminal of the second sub-battery is connected to the second positive terminal sub-connector on the power supply side. The negative terminal of the first sub-battery and the negative terminal of the second sub-battery are both connected to the negative terminal connector on the power supply side.

[0022] By installing two sub-batteries, more power supply circuit selection schemes can be provided by the first drive assembly and the second drive assembly, realizing flexible installation of the power supply circuit structure. When a failure or insufficient power occurs in one of the sub-batteries, the other sub-battery can supply power to the first drive assembly and the second drive assembly, thereby reducing the probability of power supply failure due to failure or insufficient power of the power supply module.

[0023] Also, the positive electrodes of the first sub-battery and the second sub-battery are respectively connected to different connectors, and there is no need to bundle the positive electrode conductors of the first sub-battery and the second sub-battery together and connect them to the same connector, improving the convenience of wiring.

[0024] In some embodiments of the present application, the negative electrode connector on the power supply side includes a first negative electrode sub-connector on the power supply side and a second negative electrode sub-connector on the power supply side. The negative electrode of the first sub-battery is connected to the first negative electrode sub-connector on the power supply side, and the negative electrode of the second sub-battery is connected to the second negative electrode sub-connector on the power supply side. The first negative electrode sub-connector on the power supply side and the second negative electrode sub-connector on the power supply side are both connected to the first end of the negative electrode circuit.

[0025] In this way, the negative electrodes of the first sub-battery and the second sub-battery are respectively connected to different connectors, and there is no need to bundle the negative electrode conductors of the first sub-battery and the second sub-battery together and connect them to the same connector, improving the convenience of wiring. Also, when the negative electrodes of the first sub-battery and the second sub-battery are connected to the same connector, if this same connector fails, the power supply circuits of the two sub-batteries will both fail, and the operations of the two drive assemblies will both be affected. By installing the first negative electrode sub-connector on the power supply side and the second negative electrode sub-connector on the power supply side, the situation where the power supply circuits of the two sub-batteries are affected by the same connector can be improved, and the occurrence rate of power supply failure of the battery can be reduced.

[0026] In some embodiments of the present application, the drive-side positive connector includes a drive-side first positive subconnector and a drive-side second positive subconnector, wherein the second end of the first positive branch circuit is connected to the drive-side first positive subconnector, the second end of the second positive branch circuit is connected to the drive-side second positive subconnector, the first end of the first drive assembly is connected to the drive-side first positive subconnector, and the first end of the second drive assembly is connected to the drive-side second positive subconnector.

[0027] Thus, the first end of the first drive assembly and the first end of the second drive assembly are connected to different connectors, eliminating the need to bundle the conductors at the first end of the first drive assembly and the first end of the second drive assembly together and connect them to the same connector, thus improving wiring convenience. Furthermore, the second end of the first positive terminal branch circuit and the second end of the second positive terminal branch circuit are connected to different connectors, eliminating the need to bundle the conductors at the second end of the first positive terminal branch circuit and the second end of the second positive terminal branch circuit together and connect them to the same connector, thus improving wiring convenience.

[0028] In some embodiments of this application, a first current sensor and a first positive branch circuit switch are installed in the first positive branch circuit, and a second current sensor and a second positive branch circuit switch are installed in the second positive branch circuit. The current sensor can detect the magnitude of the current flowing through the battery, which helps to determine whether a fault has occurred in the circuit based on the detected current, and enables adjustments to several control flows based on the current.

[0029] In some embodiments of this application, the negative electrode circuit is provided with a main-negative switch and a pre-charge circuit connected in parallel with the main-negative switch. Placing the pre-charge circuit in the negative electrode circuit helps to leave more space in the positive electrode circuit, thereby allowing other components to be installed or wired in the remaining space.

[0030] A second aspect of this application provides a power consumption device including a control device and a charge / discharge circuit of any one embodiment of the first aspect, The control device is communicated to the switch element in the charge / discharge circuit, and the switch element includes at least the first switch module.

[0031] The power consumption device of the second embodiment can achieve the beneficial technical effects that can be achieved by the charge / discharge circuit of any one embodiment of the first embodiment.

[0032] The above description is merely an outline of the technical proposal of the embodiments of this application. In order to provide a clearer understanding of the technical means of the embodiments of this application, to enable implementation in accordance with the contents of the specification, and to provide a clearer understanding of the above and other objectives, features, and advantages of the embodiments of this application, the following will provide specific examples of the embodiments of this application.

[0033] By reading the detailed description of the embodiments below, various other advantages and benefits will become apparent to those skilled in the art. The drawings are used solely to illustrate the purpose of the embodiments of this application and are not intended to be considered limitations to this application. Note that the same drawing number indicates the same component in all drawings. [Brief explanation of the drawing]

[0034] [Figure 1] This is a schematic diagram of the structure of a vehicle according to one or more embodiments. [Figure 2] This is a schematic diagram of the structure of a charge / discharge circuit according to one or more embodiments. [Figure 3] This is a schematic diagram of the structure of a charge / discharge circuit according to one or more embodiments. [Figure 4] This is a schematic diagram of the structure of a charge / discharge circuit according to one or more embodiments. [Figure 5] This is a schematic diagram of the structure of a charge / discharge circuit according to one or more embodiments. [Figure 6] This is a schematic diagram of the structure of a charge / discharge circuit according to one or more embodiments. [Figure 7]This is a schematic diagram of the structure of a charge / discharge circuit according to one or more embodiments. [Figure 8] This is a schematic diagram of the structure of a charge / discharge circuit according to one or more embodiments. [Figure 9] This is a schematic diagram of the structure of a charge / discharge circuit according to one or more embodiments. [Figure 10] This is a schematic diagram of the structure of a charge / discharge circuit according to one or more embodiments. [Figure 11] This is a schematic diagram of the structure of a charge / discharge circuit according to one or more embodiments. [Figure 12] This is a schematic diagram of the structure of a power consumption device according to one or more embodiments. [Modes for carrying out the invention]

[0035] The following describes in detail embodiments of the technical proposal of this application, accompanied by drawings. These embodiments are merely examples intended to clarify the technical proposal of this application and should not be used to limit the scope of protection of this application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art relating to the present application. The terms used herein are solely for the purpose of describing specific embodiments and are not intended to limit this application. The terms “including” and “having” and any variations thereof in the description of the specification, claims, and drawings of this application are intentionally intended to cover the non-exclusive “including.”

[0037] In the descriptions of the embodiments of this application, technical terms such as "first," "second," etc., are merely used to distinguish different subjects and should not be understood as implicitly indicating or suggesting the relative importance of the number, specific order, or hierarchical relationship of technical features. In the descriptions of the embodiments of this application, unless specifically defined otherwise, "plural" means two or more.

[0038] The “Examples” as used herein mean that certain features, structures, or characteristics described in conjunction with the Examples may be included in at least one Example of this Application. The appearance of this phrase at each location in the Specification does not necessarily refer to the same Example, nor do they represent mutually exclusive or alternative Examples. Those skilled in the art will understand, both explicitly and implicitly, that the Examples described herein can be combined with other Examples.

[0039] In the description of the embodiments of this application, the term "and / or" merely describes the relationship between related objects and indicates that three relationships may exist. For example, A and / or B may represent three cases: A, a combination of A and B, and B. In this specification, the letter " / " generally indicates that the preceding and succeeding related objects are in an "or" relationship.

[0040] 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 sets (including two sets), and "multiple sheets" refers to two or more sheets (including two sheets).

[0041] In the description of the embodiments of this application, the orientations or positional relationships indicated by technical terms such as "center," "vertical direction," "horizontal direction," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial direction," "radial direction," and "circumferential direction" are orientations or positional relationships shown based on the drawings and are merely for the purpose of facilitating and simplifying the description of the embodiments of this application. They do not indicate or imply that the mentioned devices or elements have a specific orientation or must be configured and operated in a specific orientation, and therefore should not be understood as limitations on the embodiments of this application.

[0042] In the description of the embodiments of this application, unless otherwise explicitly defined or limited, technical terms such as “attachment,” “connection,” “bonding,” and “fixing” should be understood in a broad sense. For example, these may be fixed connections, removable connections, integral connections, mechanical connections, electrical connections, direct connections, indirect connections via an intermediate medium, internal communication between two elements, or interaction relationships between two elements. Those skilled in the art may understand the specific meaning of these terms in the embodiments of this application depending on the specific circumstances.

[0043] Currently, power-consuming devices employing dual motor drive are already widely used, for example, in power-consuming devices such as electric vehicles, ships, and spacecraft that employ dual motors. These power-consuming devices are powered by batteries, and the two motors convert the electrical energy from the batteries into mechanical energy, thereby driving the operation of the device.

[0044] In related technologies, single-cell dual-motor circuit architectures have a relatively simple circuit structure, and it is not possible to change the circuit structure or switch between different electrical circuits. As a result, they cannot realize the full functionality of dual-motor circuits.

[0045] To address the problems present in related technologies, embodiments of this application provide a charge / discharge circuit comprising a power supply module, a first drive assembly, a second drive assembly, and a first switch module, wherein the first and second drive assemblies are connected in parallel between the positive and negative terminals of the power supply module, one end of the first switch module is connected to the first drive assembly, and the other end of the first switch module is connected to the second drive assembly. By controlling the first switch module to switch the connection relationship between the first and second drive assemblies, flexible changes in the circuit structure can be achieved, enabling a wider range of functions.

[0046] The battery in the embodiments of this application may include battery cells, battery modules, or battery packs, and the embodiments of this application do not limit the size of the battery. This battery may be a power battery, for example, a lithium battery, a lead-acid battery, a nickel-cadmium battery, a sodium-sulfur battery, etc.

[0047] Embodiments of this application further provide power-consuming devices that use the above-described charge / discharge circuit, which may be, but are not limited to, electric toys, power tools, electric motorcycles, electric automobiles, steamships, aerospace vehicles, etc. Power-consuming devices use the charge / discharge circuit disclosed in this application and can thus control the on / off state of each switch transistor in the first switch module and motor controller based on demand, thereby flexibly switching the charge / discharge circuit to configure different electrical circuits and realize different functions.

[0048] In the following embodiments, for the sake of clarity, we will describe an example in which one of the embodiments of this application is a vehicle 1000.

[0049] Referring to Figure 1, which is a schematic diagram of the structure of a vehicle 1000 according to some embodiments of the present application, the vehicle 1000 may be a new energy vehicle, which may be a pure electric vehicle or a range extender vehicle, etc. A battery 100 is installed inside the vehicle 1000, and the battery 100 may be installed at the bottom, head, or tail of the vehicle 1000. The battery 100 may be used to supply power to the vehicle 1000, for example, the battery 100 may be used as the operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, the controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the operating power consumption requirements for starting the vehicle 1000, navigation, and driving.

[0050] The battery 100 can also function as a power source for the vehicle 1000, providing it with driving force. The motor 300 converts the electrical energy output from the battery 100 into mechanical energy to drive the movement of the vehicle 1000.

[0051] In actual applications, the number of motors 300 may be one or two, etc. The charge / discharge circuit according to the embodiment of this application is applicable when the vehicle 1000 has one battery 100 and two motors 300.

[0052] Figure 2 shows a schematic diagram of the structure of a charge / discharge circuit according to some embodiments of the present application. As shown in Figure 2, the charge / discharge circuit 400 includes a power supply module 1, a first drive assembly 2, a second drive assembly 3, and a first switch module 4. The first drive assembly 2 and the second drive assembly 3 are connected in parallel between the positive and negative terminals of the power supply module 1, one end of the first switch module 4 is connected to the first drive assembly 2, and the other end of the first switch module 4 is connected to the second drive assembly 3.

[0053] The power supply module 1 is used to supply power to other components in the charge / discharge circuit 400, and may also be used to supply power to other components requiring power consumption in the power-consuming equipment to which the charge / discharge circuit 400 belongs. The first drive assembly 2 and the second drive assembly 3 are energy conversion modules used to convert the electrical energy output by the power supply module 1 into mechanical energy. When the first switch module 4 is closed, an electrical circuit is formed in which the power supply module 1, the first drive assembly 2, and the second drive assembly 3 are connected in series, and after turning off the first switch module 4, the electrical circuit in which the power supply module 1, the first drive assembly 2, and the second drive assembly 3 are connected in series can be disconnected.

[0054] The first switch module 4 may be a relay or an IGBT transistor, or any other device capable of realizing a switching function. The embodiments of this application do not limit the specific device selected for the transistor of the first switch module 4. Any device capable of realizing the function of turning a circuit on or off, and capable of automatically controlling its on / off state by a signal, can be used as the first switch module 4.

[0055] In the charge / discharge circuit according to the embodiment of this application, one end of the first switch module 4 is connected to the first drive assembly 2, and the other end of the first switch module 4 is connected to the second drive assembly 3. By controlling the first switch module 4 to switch the connection relationship between the first drive assembly 2 and the second drive assembly 3, a flexible change in the circuit structure can be achieved, enabling a wider range of functions.

[0056] Figure 3 shows a schematic diagram of the structure of a charge / discharge circuit according to some embodiments of the present application. As shown in Figure 3, the charge / discharge circuit 400 includes a power supply module 1, a first drive assembly 2, a second drive assembly 3, and a first switch module 4.

[0057] Here, the first drive assembly 2 includes the first motor 21, and the second drive assembly 3 includes the second motor controller 32. The first drive assembly 2 and the second drive assembly 3 are connected in parallel between the positive and negative terminals of the power supply module 1. One end of the first switch module 4 is connected to the neutral point of the first motor 21, and the other end of the first switch module 4 is connected to the upper and lower bridge arm connection point of at least one bridge arm of the second motor controller 32.

[0058] The power supply module 1 is used to supply power to other components in the charge / discharge circuit 400, and may also be used to supply power to other components requiring power consumption in the power-consuming equipment to which the charge / discharge circuit 400 belongs.

[0059] The first drive assembly 2 and the second drive assembly 3 are energy conversion modules used to convert the electrical energy output by the power supply module 1 into mechanical energy. The first drive assembly 2 includes a first motor 21, and may further include a first motor controller 22 connected to the first motor 21. The second drive assembly 3 includes a second motor 31 and a second motor controller 32 connected to the second motor 31. The motor controller is used to convert the DC current output from the battery into the AC current required for the motor, and the motor is used to convert the electrical energy of the input AC current into mechanical energy. Here, the first motor controller 22 and the second motor 31 are not shown in Figure 3, but are shown in Figures 4 to 8.

[0060] The first motor 21 and the second motor 31 described above may be motors with any number of phases, for example, three-phase motors, four-phase motors, six-phase motors, etc. The number of phases of the first motor 21 and the second motor 31 may or may not be the same. Both the first motor controller 22 and the second motor controller 32 include multiple bridge arms. Each bridge arm includes an upper bridge arm and a lower bridge arm, and each bridge arm in the first motor controller 22 is connected in a one-to-one correspondence with each phase winding of the first motor 21, and the upper and lower bridge arm connection points in the bridge arms are connected to the corresponding single-phase winding of the first motor 21. The connection method between the bridge arms in the second motor controller 32 and the windings of the second motor 31 is the same and will not be described further. One switch transistor is installed on each of the upper and lower bridge arms in the above-mentioned bridge arms, and this switch transistor may be an IGBT (Insulated Gate Bipolar Transistor) transistor.

[0061] The first switch module 4 may be a relay or an IGBT transistor, or any other device capable of realizing a switching function. The embodiments of this application do not limit the specific device selected for the transistor of the first switch module 4. Any device capable of realizing the function of turning a circuit on or off, and capable of automatically controlling its on / off state by a signal, can be used as the first switch module 4.

[0062] In the charge / discharge circuit 400 according to the embodiment of this application, the first motor 21 is connected to the first motor controller 22 to constitute the first drive assembly 2, and the second motor 31 is connected to the second motor controller 32 to constitute the second drive assembly 3. The first drive assembly 2 and the second drive assembly 3 are connected in parallel between the positive and negative terminals of the power supply module 1. In this way, the power supply module 1 can supply power to the first motor 21 and the second motor 31, respectively, and the first motor 21 and the second motor 31 convert the electrical energy output from the battery 100 into mechanical energy, respectively, and the first motor 21 and the second motor 31 provide driving power to the power-consuming equipment to which the charge / discharge circuit 400 belongs.

[0063] In this charge / discharge circuit 400, the first switch module 4 is connected between the neutral point of the first motor 21 and the upper and lower bridge arm connection point of at least one bridge arm of the second motor controller 32. The neutral point of the motor is the connection point of all the windings in the motor. When the first switch module 4 is disconnected, an electrical circuit is formed in which the first drive assembly 2 and the second drive assembly 3 are connected in parallel to both ends of the power supply module 1. With this circuit structure, the power supply module 1 supplies power to the first drive assembly 2 and the second drive assembly 3, and the first motor 21 in the first drive assembly 2 and the second motor 31 in the second drive assembly 3 convert the electrical energy output from the power supply module 1 into mechanical energy, thereby realizing the function of driving the movement of power-consuming equipment.

[0064] When the first switch module 4 is closed, an electrical circuit is formed in which the power supply module 1, the first drive assembly 2, and the second drive assembly 3 are connected in series. This circuit structure enables the power supply module 1 and the windings of the first motor 21 and the second motor 31 to alternately charge and discharge, generating an alternating current in this electrical circuit, which in turn heats up the internal resistance of the battery and achieves the effect of heating the battery.

[0065] When the first switch module 4 is closed, the number of motor windings connected to the electrical circuit is adjusted by further controlling the on / off switching of different bridge arms in the first motor controller 22 and the second motor controller 32, thereby enabling a wider variety of circuit configurations, more functions, and meeting the control requirements of different types of power-consuming equipment.

[0066] A first switch module 4 is connected between the upper and lower bridge arm connection point of at least one bridge arm of the first motor 21 and the second motor controller 32. The first switch module 4 can switch the connection relationship between the first motor 21 and the bridge arm of the second motor controller 32, thereby enabling the formation of different electrical circuits. This allows the circuit architecture to flexibly change its circuit structure, thereby supporting the realization of more different functions. For example, in an electric vehicle, the first switch module 4 can control the first drive assembly 2 and the second drive assembly 3 to be connected in series, thereby enabling a conversion from a driving mode to a battery self-heating mode.

[0067] One end of the first switch module 4 is connected to the neutral point of the first motor 21, and the other end is connected to the upper and lower bridge arm connection point of at least one bridge arm of the second motor controller 32. This eliminates the need to draw out the neutral wire of the second motor 31, saving costs, and also allows for adjustment of the impedance during the self-heating process of the battery by utilizing the phase-forward conduction of the second motor controller 32.

[0068] As shown in Figure 4, in some embodiments of this application, the first switch module 4 includes a main switch 41 and a plurality of sub-switches, the number of which is less than or equal to the number of bridge arms in the second motor controller 32. For example, if the first switch module 4 includes a main switch 41 and one sub-switch, the first end of this sub-switch may be connected to the second end of the main switch 41, and the second end of this sub-switch may be connected to the upper and lower bridge arm connection point of any of the bridge arms in the second motor controller 32. If the first switch module 4 includes a main switch 41 and two sub-switches, the second ends of these two sub-switches may be connected to the upper and lower bridge arm connection points of any two different bridge arms in the second motor controller 32.

[0069] In the example shown in Figure 4, the number of bridge arms in the second motor controller 32 is 3, and the first switch module 4 includes a main switch 41 and three sub-switches, which are the first sub-switch 42, the second sub-switch 43, and the third sub-switch 44, respectively. The first end of the main switch 41 is connected to the neutral point of the first motor 21, the first end of each sub-switch is connected to the second end of the main switch, and the second end of each sub-switch is connected to the upper and lower bridge arm connection points of different bridge arms in the second motor controller 32. In driving mode, the main switch 41 and the first sub-switch 42, the second sub-switch 43, and the third sub-switch 44 are all disconnected. By closing the main switch 41 and simultaneously closing at least one of the three sub-switches, a series connection between the first motor 21 and the second motor controller 32 can be achieved, and at the same time, the bridge arms in the first motor controller 22 and the bridge arms in the second motor controller 32 can be operated in cooperation, putting the battery 100 into self-heating mode. In the state shown in Figure 4, the main switch 41 and the first sub-switch 42, the second sub-switch 43, and the third sub-switch 44 are all closed.

[0070] For example, by closing the main switch 41, simultaneously closing the first sub-switch 42, and disconnecting the second sub-switch 43 and the third sub-switch 44, a series connection between the first motor 21 and the second motor controller 32 can be achieved. Simultaneously, all upper bridge arms in the first motor controller 22 are turned on, all lower bridge arms in the first motor controller 22 are disconnected, the switch transistor V21 in the second motor controller 32 is turned off, and the switch transistor V24 in the second motor controller 32 is turned on. The current then passes sequentially through the positive terminal of the battery 100, the first motor controller 22, the first motor 21, the second motor controller 32, and the negative terminal of the battery 100, forming a circuit and causing the battery 100 to enter self-heating mode.

[0071] The main switch 41 controls the connection and disconnection of the first motor 21 and the second motor controller 32, and multiple sub-switches allow for more flexible selection of the connection and disconnection of multiple bridge arms in the second motor controller 32. Closing the main switch and at least one sub-switch activates the battery self-heating mode, and controlling the main switch to turn it off activates the battery self-heating mode.

[0072] Furthermore, the first motor controller 22 included in the first drive assembly 2 has a capacitor C01 connected in parallel to each bridge arm, and the second motor controller 32 included in the second drive assembly 3 has a capacitor C02 connected in parallel to each bridge arm.

[0073] In the embodiment shown in Figure 4, the negative electrode circuit 11 is equipped with a main-negative switch 14 and a pre-charge circuit 13 connected in parallel with the main-negative switch 14. The pre-charge circuit 13 includes a pre-charge switch and a resistor R connected in series. This pre-charge switch may be a switch whose on / off state can be controlled by a signal, and may be, for example, a relay or an IGBT transistor. This pre-charge circuit 13 is used to protect the main-positive switch 12 and the main-negative switch 14 at the moment the main-positive switch 12 and the main-negative switch 14 are closed and the battery 100 is connected to the circuit, thereby reducing the occurrence of a situation in which the main-positive switch 12 and the main-negative switch 14 may become stuck and damaged due to overcurrent and overheating.

[0074] As shown in Figure 5, in some embodiments of this application, the first switch module 4 includes a plurality of sub-switches, the number of which is equal to the number of bridge arms in the second motor controller 32. In the example shown in Figure 5, the number of bridge arms in the second motor controller 32 is 3, and the first switch module 4 includes 3 sub-switches, which are the first sub-switch 42, the second sub-switch 43, and the third sub-switch 44, respectively. The first end of each sub-switch is connected to the neutral point of the first motor 21, and the second end of each sub-switch is connected in a one-to-one correspondence to the upper and lower bridge arm connection points of different bridge arms in the second motor controller. In driving mode, the first sub-switch 42, the second sub-switch 43, and the third sub-switch 44 are all off. By closing at least one of the first sub-switch 42, the second sub-switch 43, and the third sub-switch 44, a series connection between the first motor 21 and the second motor controller 32 can be achieved, and at the same time, the bridge arm in the second motor controller 32 can be operated in cooperation to put the battery 100 into self-heating mode. In the state shown in Figure 5, the first sub-switch 42, the second sub-switch 43, and the third sub-switch 44 are all closed.

[0075] For example, by closing the first sub-switch 42 and disconnecting the second sub-switch 43 and the third sub-switch 44, a series connection between the first motor 21 and the second motor controller 32 can be achieved. Simultaneously, all upper bridge arms in the first motor controller 22 are turned on, all lower bridge arms in the first motor controller 22 are disconnected, the switch transistor V21 in the second motor controller 32 is turned off, and the switch transistor V24 in the second motor controller 32 is turned on. The current then passes sequentially through the positive terminal of the battery 100, the first motor controller 22, the first motor 21, the second motor controller 32, and the negative terminal of the battery 100, forming a circuit and causing the battery 100 to enter self-heating mode.

[0076] Multiple sub-switches enable connection and disconnection between the first motor 21 and multiple bridge arms of the second motor controller 32. Closing at least one sub-switch enters the battery self-heating mode, and controlling all sub-switches to disconnect them turns off the battery self-heating mode.

[0077] As shown in Figure 6, in some embodiments of this application, the power supply module 1 includes a battery 100 and a battery main control box 9, and the battery 100 included in the power supply module 1 may be a battery cell, a battery module, or a battery pack. The battery 100 included in the power supply module 1 may be a single battery, or it may be a larger battery pack formed by connecting multiple batteries in series, and this battery pack can be treated as a single battery.

[0078] Specifically, the battery main control box 9 is equipped with a power supply side positive terminal connector 91, a drive side positive terminal connector 92, a power supply side negative terminal connector 93, and a drive side negative terminal connector 94. A positive terminal circuit 10 is connected between the power supply side positive terminal connector 91 and the drive side positive terminal connector 92, and a negative terminal circuit 11 is connected between the power supply side negative terminal connector 93 and the drive side negative terminal connector 94. The positive terminal of the battery 100 is connected to the power supply side positive terminal connector 91, and the negative terminal of the battery 100 is connected to the power supply side negative terminal connector 93. The drive side positive terminal connector 92 is connected to the first end of the first drive assembly 2 and the first end of the second drive assembly 3, respectively, and the drive side negative terminal connector 94 is connected to the second end of the first drive assembly 2 and the second end of the second drive assembly 3, respectively.

[0079] The battery main control box 9 is equipped with a power supply side positive terminal connector 91, a drive side positive terminal connector 92, a power supply side negative terminal connector 93, and a drive side negative terminal connector 94. The positive and negative terminals of the battery 100 can be easily connected to the battery main control box 9 via wires, and the first drive assembly 2 and the second drive assembly 3 can also be easily connected to the battery main control box 9, improving the convenience of wiring. The battery main control box 9 can control the connection relationship between the battery 100 and the first drive assembly 2 and the second drive assembly 3, and in the event of a circuit abnormality, it can timely disconnect the connection between the battery 100 and other components, thereby protecting the battery 100. The battery main control box 9 can detect parameters such as the current or voltage of the battery 100, contributing to more accurate circuit control, and can also determine whether or not a circuit abnormality has occurred based on the detected parameters.

[0080] The first motor controller 22 included in the first drive assembly 2 has three bridge arms, and the first motor 21 has three windings. The second motor controller 32 included in the second drive assembly 3 has three bridge arms, and the second motor 31 has three windings. In actual applications, the two motors may be motors with any number of phases, and the number of bridge arms in the corresponding motor controllers may be other numbers.

[0081] The battery main control box 9 is used to control the connection between the battery 100 and the first drive assembly 2 and the second drive assembly 3. For example, it controls the battery 100 to communicate with the first drive assembly 2, or to disconnect the battery 100 from the first drive assembly 2, or to communicate with the second drive assembly 3, or to disconnect the battery 100 from the second drive assembly 3. The battery main control box 9 may also be used to detect the magnitude of the current flowing through the positive electrode circuit 10 or the negative electrode circuit 11, or to detect the magnitude of the voltage across the positive and negative electrodes of the battery 100.

[0082] In the first motor controller 22, the upper bridge arms of each bridge arm are cowired together, and each upper bridge arm is connected integrally and connected to the positive terminal connector 92 on the drive side. The lower bridge arms of each bridge arm are cowired together, and each lower bridge arm is connected integrally and connected to the negative terminal connector 94 on the drive side.

[0083] In the second motor controller 32, the upper bridge arms of each bridge arm are cowired together, and each upper bridge arm is connected integrally and connected to the positive terminal connector 92 on the drive side. The lower bridge arms of each bridge arm are cowired together, and each lower bridge arm is connected integrally and connected to the negative terminal connector 94 on the drive side.

[0084] In the embodiment shown in Figure 6, a main positive switch 12 and a current sensor 15 are installed in the positive electrode circuit 10. A main negative switch 14 and a precharge circuit 13 connected in parallel with the main negative switch 14 are installed in the negative electrode circuit 11. The main positive switch 12 may be a switch whose on / off state can be controlled by a signal, for example, a relay or an IGBT transistor, and the main positive switch 12 shown in Figure 6 is in the closed state. The precharge circuit 13 includes a precharge switch and a resistor R connected in series, and this precharge switch may be a switch whose on / off state can be controlled by a signal, for example, a relay or an IGBT transistor. This precharge circuit 13 is used to protect the main positive switch 12 and the main negative switch 14 at the moment when the main positive switch 12 and the main negative switch 14 are closed and the battery 100 is connected to the circuit, and to reduce the occurrence of a situation in which the main positive switch 12 and the main negative switch 14 stick and are damaged due to overcurrent and overheating. In some embodiments, a main-negative switch 14 and a pre-charge circuit 13 connected in parallel with the main-negative switch 14 may be installed in the positive electrode circuit 10, and a main-positive switch 12 and a current sensor 15 may be installed in the negative electrode circuit 11.

[0085] Furthermore, the first motor controller 22 included in the first drive assembly 2 has a capacitor C01 connected in parallel to each bridge arm, and the second motor controller 32 included in the second drive assembly 3 has a capacitor C02 connected in parallel to each bridge arm. This pre-charge circuit 13 can also be used to protect capacitors C01 and C02 when the circuit operates under overvoltage or overcurrent, and to reduce the occurrence of situations in which capacitors C01 and C02 are damaged.

[0086] As shown in Figure 7, in some embodiments of the present application, the drive-side positive connector 92 includes a drive-side first positive subconnector 921 and a drive-side second positive subconnector 922, the first end of the positive circuit 10 is connected to the power supply-side positive connector 91, and the second end of the positive circuit 10 is connected to the drive-side first positive subconnector 921 and the drive-side second positive subconnector 922, respectively, the drive-side first positive subconnector 921 is connected to the first end of the first drive assembly 2, and the drive-side second positive subconnector 922 is connected to the first end of the second drive assembly 3.

[0087] Thus, the first end of the first drive assembly 2 and the first end of the second drive assembly 3 are connected to different connectors, eliminating the need to bundle the conductors at the first end of the first drive assembly 2 and the first end of the second drive assembly 3 together and connect them to the same connector, thus improving wiring convenience. Furthermore, in related technologies, the first drive assembly 2 and the second drive assembly 3 are connected to the same connector, and if this same connector fails, the operation of both drive assemblies is affected. By installing a first positive subconnector 921 on the drive side and a second positive subconnector 922 on the drive side, the situation in related technologies where the operation of both drive assemblies is affected by the same connector can be improved, and the failure rate can be reduced.

[0088] In the embodiment shown in Figure 7, the drive-side negative terminal connector 94 includes a first drive-side negative terminal subconnector 941 and a second drive-side negative terminal subconnector 942. The first end of the negative terminal circuit 11 is connected to the power supply-side negative terminal connector 93, and the second ends of the negative terminal circuit 11 are connected to the first drive-side negative terminal subconnector 941 and the second drive-side negative terminal subconnector 942, respectively. The first drive-side negative terminal subconnector 941 is connected to the second end of the first drive assembly 2, and the second drive-side negative terminal subconnector 942 is connected to the second end of the second drive assembly 3.

[0089] Thus, the second end of the first drive assembly 2 and the second end of the second drive assembly 3 are connected to different connectors, eliminating the need to bundle the conductors of the second end of the first drive assembly 2 and the second end of the second drive assembly 3 together and connect them to the same connector, thus improving wiring convenience. Furthermore, in related technologies, the second end of the first drive assembly 2 and the second end of the second drive assembly 3 are connected to the same connector, and if this same connector fails, the operation of both drive assemblies is affected. In this embodiment, by installing a first negative subconnector 941 on the drive side and a second negative subconnector 942 on the drive side, the situation in related technologies where the operation of both drive assemblies is affected by the same connector can be improved, thereby reducing the failure rate.

[0090] As shown in Figure 8, in some embodiments of this application, the battery includes a first sub-battery 5 and a second sub-battery 6, the power supply side positive terminal connector 91 includes a power supply side first positive terminal sub-connector 911 and a power supply side second positive terminal sub-connector 912, the positive terminal circuit 10 includes a first positive terminal branch circuit 101 and a second positive terminal branch circuit 102, the first end of the first positive terminal branch circuit 101 is connected to the power supply side first positive terminal sub-connector 911, and the first end of the second positive terminal branch circuit 102 is The second positive sub-connector 912 on the power supply side is connected to the second positive sub-connector 912 of the first positive branch circuit 101 and the second positive branch circuit 102, both of which are connected to the positive connector 92 on the drive side. The positive terminal of the first sub-battery 5 is connected to the first positive sub-connector 911 on the power supply side, the positive terminal of the second sub-battery 6 is connected to the second positive sub-connector 912 on the power supply side, and the negative terminal of the first sub-battery 5 and the negative terminal of the second sub-battery 6 are both connected to the negative connector 93 on the power supply side.

[0091] The installation of two auxiliary batteries provides more power supply circuit options for the first and second drive assemblies, enabling flexible installation of the power supply circuit structure. If one of the auxiliary batteries fails or experiences insufficient power, the other auxiliary battery can supply power to both the first and second drive assemblies, thereby reducing the probability of power supply failure due to failure or insufficient power in the power supply module.

[0092] Furthermore, the positive terminals of the first sub-battery 5 and the second sub-battery 6 are connected to different connectors, eliminating the need to bundle the positive terminal wires of the first sub-battery 5 and the second sub-battery 6 together and connect them to the same connector, thus improving wiring convenience. Also, if the positive terminals of the first sub-battery 5 and the second sub-battery 6 are connected to the same connector, a failure of this connector would cause both the power supply circuits of the two sub-batteries to fail, affecting the operation of both drive assemblies. By installing a first positive terminal sub-connector and a second positive terminal sub-connector on the power supply side, the situation in which the power supply circuits of the two sub-batteries are affected by the same connector can be improved, thereby reducing the incidence of battery power supply failures.

[0093] In some embodiments of this application, a first positive branch circuit current sensor 151 and a first positive branch circuit switch 121 are installed in a first positive branch circuit 101, and a second positive branch circuit current sensor 152 and a second positive branch circuit switch 122 are installed in a second positive branch circuit 102. The current sensors can detect the magnitude of the current flowing through the battery, which helps to determine whether a fault has occurred in the circuit based on the detected current, and enables adjustments to several control flows based on the current.

[0094] As shown in Figure 9, in some embodiments of this application, the power supply side negative terminal connector 93 includes a power supply side first negative terminal subconnector 931 and a power supply side second negative terminal subconnector 932, the negative terminal of the first sub-battery 5 is connected to the power supply side first negative terminal subconnector 931, the negative terminal of the second sub-battery 6 is connected to the power supply side second negative terminal subconnector 932, and both the power supply side first negative terminal subconnector 931 and the power supply side second negative terminal subconnector 932 are connected to the first end of the negative terminal circuit 11.

[0095] Thus, the negative terminals of the first sub-battery 5 and the second sub-battery 6 are connected to different connectors, eliminating the need to bundle the negative terminal wires of the first sub-battery and the second sub-battery 6 together and connect them to the same connector, thus improving wiring convenience. Furthermore, if the negative terminals of the first sub-battery 5 and the second sub-battery 6 were connected to the same connector, a failure of this connector would cause both sub-battery power supply circuits to fail, affecting the operation of both drive assemblies. This embodiment improves the situation where the power supply circuits of the two sub-batteries are affected by the same connector by installing a first negative terminal sub-connector and a second negative terminal sub-connector on the power supply side, thereby reducing the incidence of battery power supply failures.

[0096] As shown in Figure 10, in some embodiments of the present application, the drive-side positive connector 92 includes a drive-side first positive subconnector 921 and a drive-side second positive subconnector 922, the second end of the first positive branch circuit 101 is connected to the drive-side first positive subconnector 921, the second end of the second positive branch circuit 102 is connected to the drive-side second positive subconnector 922, the first end of the first drive assembly 2 is connected to the drive-side first positive subconnector 921, and the first end of the second drive assembly 3 is connected to the drive-side second positive subconnector 922.

[0097] Thus, the first end of the first drive assembly 2 and the first end of the second drive assembly 3 are connected to different connectors, eliminating the need to bundle the conductors at the first end of the first drive assembly 2 and the first end of the second drive assembly 3 together and connect them to the same connector, thus improving wiring convenience. Furthermore, the second end of the first positive terminal branch circuit 101 and the second end of the second positive terminal branch circuit 102 are connected to different connectors, eliminating the need to bundle the conductors at the second end of the first positive terminal branch circuit 101 and the second end of the second positive terminal branch circuit 102 together and connect them to the same connector, thus improving wiring convenience.

[0098] The drive-side negative terminal connector 94 includes a drive-side first negative terminal subconnector 941 and a drive-side second negative terminal subconnector 942. The second end of the first drive assembly 2 is connected to the drive-side first negative terminal subconnector 941, and the second end of the second drive assembly 3 is connected to the drive-side second negative terminal subconnector 942. Both the drive-side first negative terminal subconnector 941 and the drive-side second negative terminal subconnector 942 are connected to the second end of the negative terminal circuit 11.

[0099] Thus, the second end of the first drive assembly 2 and the second end of the second drive assembly 3 are connected to different connectors, eliminating the need to bundle the conductors of the second end of the first drive assembly 2 and the second end of the second drive assembly 3 together and connect them to the same connector, thus improving wiring convenience. Furthermore, in related technologies, the second end of the first drive assembly and the second end of the second drive assembly are connected to the same connector, and if this same connector fails, the operation of both drive assemblies is affected. In this embodiment, by installing a first negative subconnector 941 on the drive side and a second negative subconnector 942 on the drive side, the situation in related technologies where the operation of both drive assemblies is affected by the same connector can be improved, thereby reducing the failure rate.

[0100] The descriptions of each of the above embodiments tend to emphasize the differences between them, and their similarities or identical features can be referenced to one another; for the sake of brevity, they are not described further in this specification.

[0101] The following describes a charge / discharge circuit 400 according to an embodiment of this application using one specific example. As shown in the schematic diagram of the charge / discharge circuit 400 in Figure 11, this charge / discharge circuit 400 includes a power supply module 1, a first drive assembly 2, a second drive assembly 3, and a first switch module 4. The power supply module 1 includes a battery 100 and a main control box 9, and the battery 100 includes a first sub-battery 5 and a second sub-battery 6.

[0102] The first drive assembly 2 includes a first motor 21 and a first motor controller 22 connected to the first motor 21. The second drive assembly 3 includes a second motor 31 and a second motor controller 32 connected to the second motor 31. The first motor controller 22 has three bridge arms, and the first motor 21 has three windings. The second motor controller 32 included in the second drive assembly 3 has three bridge arms, and the second motor 31 has three windings.

[0103] Both the first motor controller 22 and the second motor controller 32 include multiple bridge arms. Each bridge arm includes an upper bridge arm and a lower bridge arm. Each bridge arm in the first motor controller 22 is connected in a one-to-one correspondence with each phase winding of the first motor 21, and the upper and lower bridge arm connection points on the bridge arms are connected to the corresponding phase windings of the first motor 21. The connection method between the bridge arms of the second motor controller 32 and the windings of the second motor 31 is the same and will not be described further.

[0104] In the first motor controller 22, the upper bridge arms of each bridge arm are cowired together, and each upper bridge arm is connected integrally and connected to the positive terminal connector 92 on the drive side. The lower bridge arms of each bridge arm are cowired together, and each lower bridge arm is connected integrally and connected to the negative terminal connector 94 on the drive side.

[0105] In the second motor controller 32, the upper bridge arms of each bridge arm are cowired together, and each upper bridge arm is connected integrally and connected to the positive terminal connector 92 on the drive side. The lower bridge arms of each bridge arm are cowired together, and each lower bridge arm is connected integrally and connected to the negative terminal connector 94 on the drive side.

[0106] The battery main control box 9 is equipped with a power supply side positive terminal connector 91, a drive side positive terminal connector 92, a power supply side negative terminal connector 93, and a drive side negative terminal connector 94. The positive and negative terminals of the first sub-battery 5 and the second sub-battery 6 can be easily connected to the battery main control box 9 via wires, and the first drive assembly 2 and the second drive assembly 3 can be easily connected to the battery main control box 9, improving the convenience of wiring.

[0107] The first switch module 4 includes a main switch 41 and three sub-switches, which are the first sub-switch 42, the second sub-switch 43, and the third sub-switch 44, respectively. The first end of the main switch 41 is connected to the neutral point of the first motor 21, the first end of each sub-switch is connected to the second end of the main switch, and the second end of each sub-switch is connected to the upper and lower bridge arm connection points of different bridge arms in the second motor controller 32. In driving mode, the main switch 41 and the first sub-switch 42, the second sub-switch 43, and the third sub-switch 44 are all disconnected. By closing the main switch 41 and simultaneously closing at least one of the three sub-switches, a series connection between the first motor 21 and the second motor controller 32 can be achieved, and at the same time, the bridge arms in the first motor controller 22 and the bridge arms in the second motor controller 32 can be operated in cooperation, causing the first sub-battery 5 or the second sub-battery 6 to enter self-heating mode.

[0108] The main switch 41 controls the connection and disconnection of the first motor 21 and the second motor controller 32, and multiple sub-switches allow for more flexible selection of the connection and disconnection of multiple bridge arms in the second motor controller 32. Closing the main switch and at least one sub-switch activates the battery self-heating mode, and controlling the main switch to turn it off activates the battery self-heating mode.

[0109] The positive terminal connector 91 on the power supply side includes a first positive terminal subconnector 911 and a second positive terminal subconnector 912 on the power supply side. The positive terminal circuit 10 includes a first positive terminal branch circuit 101 and a second positive terminal branch circuit 102. The first end of the first positive terminal branch circuit 101 is connected to the first positive terminal subconnector 911 on the power supply side, and the first end of the second positive terminal branch circuit 102 is connected to the second positive terminal subconnector 912 on the power supply side. The second end of the first positive terminal branch circuit 101 and the second end of the second positive terminal branch circuit 102 are both connected to the positive terminal connector 92 on the drive side. The positive terminal of the first sub-battery 5 is connected to the first positive terminal subconnector 911 on the power supply side, and the positive terminal of the second sub-battery 6 is connected to the second positive terminal subconnector 912 on the power supply side. The negative terminal of the first sub-battery 5 and the negative terminal of the second sub-battery 6 are both connected to the negative terminal connector 93 on the power supply side.

[0110] A first positive electrode branch circuit current sensor 151 and a first positive electrode branch circuit switch 121 are installed in the first positive electrode branch circuit 101, and a second positive electrode branch circuit current sensor 152 and a second positive electrode branch circuit switch 122 are installed in the second positive electrode branch circuit 102. The current sensors can detect the magnitude of the current flowing through the battery, which helps in determining whether a fault has occurred in the circuit based on the detected current, and enables adjustments to several control flows based on the current.

[0111] The drive-side positive terminal connector 92 includes a drive-side first positive terminal subconnector 921 and a drive-side second positive terminal subconnector 922. The second end of the first positive terminal branch circuit 101 is connected to the drive-side first positive terminal subconnector 921, the second end of the second positive terminal branch circuit 102 is connected to the drive-side second positive terminal subconnector 922, the first end of the first drive assembly 2 is connected to the drive-side first positive terminal subconnector 921, and the first end of the second drive assembly 3 is connected to the drive-side second positive terminal subconnector 922.

[0112] The negative terminal connector 93 on the power supply side includes a first negative terminal subconnector 931 and a second negative terminal subconnector 932 on the power supply side. The negative terminal of the first sub-battery 5 is connected to the first negative terminal subconnector 931 on the power supply side, and the negative terminal of the second sub-battery 6 is connected to the second negative terminal subconnector 932 on the power supply side. Both the first negative terminal subconnector 931 and the second negative terminal subconnector 932 on the power supply side are connected to the first end of the negative terminal circuit 11. The negative terminal circuit 11 is equipped with a main negative switch 14 and a pre-charge circuit 13 connected in parallel with the main negative switch 14. The pre-charge circuit 13 includes a pre-charge switch and a resistor R connected in series. This pre-charge switch may be a switch whose on / off state can be controlled by a signal, such as a relay or an IGBT transistor.

[0113] The negative terminal connector 94 on the drive side includes a first negative terminal subconnector 941 and a second negative terminal subconnector 942 on the drive side. The first end of the negative terminal circuit 11 is connected to the negative terminal connector 93 on the power supply side. The second end of the negative terminal circuit 11 is connected to the first negative terminal subconnector 941 and the second negative terminal subconnector 942 on the drive side, respectively. The first negative terminal subconnector 941 on the drive side is connected to the second end of the first drive assembly 2, and the second negative terminal subconnector 942 on the drive side is connected to the second end of the second drive assembly 3. The second end of the first drive assembly 2 is connected to the first negative terminal subconnector 941 on the drive side, and the second end of the second drive assembly 3 is connected to the second negative terminal subconnector 942 on the drive side. Both the first negative terminal subconnector 941 and the second negative terminal subconnector 942 on the drive side are connected to the second end of the negative terminal circuit 11.

[0114] The battery main control box 9 is used to control the connections between the first sub-battery 5, the second sub-battery 6, and the first drive assembly 2 and the second drive assembly 3.

[0115] Furthermore, the first motor controller 22 included in the first drive assembly 2 has a capacitor C01 connected in parallel to each bridge arm, and the second motor controller 32 included in the second drive assembly 3 has a capacitor C02 connected in parallel to each bridge arm. This pre-charge circuit 13 can also be used to protect capacitors C01 and C02 when the circuit operates under overvoltage or overcurrent, and to reduce the occurrence of situations in which capacitors C01 and C02 are damaged.

[0116] The installation of two sub-batteries provides the first drive assembly 2 and the second drive assembly 3 with a greater number of power supply circuit options, enabling flexible installation of the power supply circuit structure. If one of the sub-batteries fails or experiences insufficient power, the other sub-battery can supply power to both the first and second drive assemblies, thereby reducing the probability of power supply failure due to power supply module failure or insufficient power.

[0117] Furthermore, the positive terminals of the first sub-battery 5 and the second sub-battery 6 are connected to different connectors, eliminating the need to bundle the positive terminal wires of the first sub-battery 5 and the second sub-battery 6 together and connect them to the same connector, thus improving wiring convenience. If the positive terminals of the first sub-battery 5 and the second sub-battery 6 were connected to the same connector, a failure of this connector would cause both sub-battery power supply circuits to fail, affecting the operation of both drive assemblies. By installing a first positive terminal sub-connector and a second positive terminal sub-connector on the power supply side, the situation in which the power supply circuits of the two sub-batteries are affected by the same connector can be improved, thereby reducing the incidence of battery power supply failures.

[0118] In actual applications, when it is necessary to put the second sub-battery 6 into heating mode, the first positive terminal branch circuit switch 121 is turned off, and the main switch 41, the first sub-switch 42, the second sub-switch 43, and the third sub-switch 44 are all closed to achieve a series connection between the first motor 21 and the second motor controller 32. At the same time, all the upper bridge arms in the first motor controller 22 are turned on, all the lower bridge arms in the first motor controller 22 are turned off, all the upper bridge arms in the second motor controller 32 are turned off, and all the lower bridge arms in the second motor controller 32 are turned on. The current passes through the positive terminal of the second sub-battery 6, the first motor controller 22, the first motor 21, the second motor controller 32, and the negative terminal of the second sub-battery 6, forming a circuit and putting the second sub-battery 6 into self-heating mode.

[0119] When it is necessary to put the first sub-battery 5 into heating mode, the second positive terminal branch circuit switch 122 is turned off, and the main switch 41, the first sub-switch 42, the second sub-switch 43, and the third sub-switch 44 are all closed, enabling a series connection between the first motor 21 and the second motor controller 32. At the same time, all the upper bridge arms in the second motor controller 32 are turned on, all the lower bridge arms in the second motor controller 32 are turned off, all the upper bridge arms in the first motor controller 22 are turned off, and all the lower bridge arms in the first motor controller 22 are turned on. The current passes through the positive terminal of the first sub-battery 5, the second motor controller 32, the first motor 21, the first motor controller 22, and the negative terminal of the first sub-battery 5, forming a circuit and putting the first sub-battery 5 into self-heating mode.

[0120] The descriptions of each of the above embodiments tend to emphasize the differences between them, and their similarities or identical features can be referenced to one another; for the sake of brevity, they are not described further in this specification.

[0121] Another embodiment of the present application provides a power consumption device, as shown in Figure 12, which includes a control device 20 and a charge / discharge circuit 400 according to any one of the above embodiments, wherein the control device 20 is communicatively connected to a switch element in the charge / discharge circuit 400, and the switch element includes at least a first switch module 4.

[0122] The above-mentioned switch elements may further include switches installed in the battery main control box 9 or switches in each bridge arm of the first motor controller 22 and the second motor controller 32. The control device 20 may be a motor controller, a whole vehicle controller, or a domain controller. This power-consuming device may be any device including a single battery and a dual motor, such as an electric vehicle, electric ship, or aircraft.

[0123] The automatic control of the switch element in the charge / discharge circuit 400 by this control device 20 enables flexible switching between different electrical circuits by turning the switch element on or off, thereby enabling more functions, improving the flexibility and fault tolerance of the charge / discharge circuit control, increasing the feasible functions of the entire circuit architecture, and improving the performance of power-consuming devices.

[0124] The descriptions of each of the above embodiments tend to emphasize the differences between them, and their similarities or identical features can be referenced to one another; for the sake of brevity, they are not described further in this specification.

[0125] It should be noted that the above embodiments only illustrate the embodiments of this application, and although the descriptions are more specific and detailed, they should not be understood as limiting the scope of the claims. It should be noted that a person skilled in the art can make several further modifications and improvements without departing from the concept of this application, and all of these fall within the scope of protection of this application. Therefore, the scope of protection of this application shall be in accordance with the attached claims. [Explanation of symbols]

[0126] 1000: Vehicle, 100: Battery, 200: Controller, 300: Motor, 400: Charge / Discharge Circuit 1: Power supply module, 2: First drive assembly, 3: Second drive assembly, 4: First switch module, 5: First sub-battery, 6: Second sub-battery, 9: Battery main control box, 10: Positive electrode circuit, 11: Negative electrode circuit, 12: Main positive switch, 13: Pre-charge circuit, 14: Main negative switch, 15: Current sensor, 20: Control device, 21: First motor, 22: First motor controller, 31: Second motor, 32: Second motor controller, 41: Main switch, 42: First sub-switch, 43: Second sub-switch, 44: Third sub-switch, 91: Power supply side positive connector, 92: Drive side positive connector, 93: Power supply side negative connector, 94: Drive side negative connector, 911: First positive subconnector on the power supply side, 912: Second positive subconnector on the power supply side, 921: First positive subconnector on the drive side, 922: Second positive subconnector on the drive side, 931: First negative subconnector on the power supply side, 932: Second negative subconnector on the power supply side, 941: First negative subconnector on the drive side, 942: Second negative subconnector on the drive side, 101: First positive branch circuit, 102: Second positive branch circuit, 151: First positive branch circuit current sensor, 121: First positive branch circuit switch, 152: Second positive branch circuit current sensor, 122: Second positive branch circuit switch.

Claims

1. A charge / discharge circuit comprising a power supply module, a first drive assembly, a second drive assembly, and a first switch module, The first drive assembly and the second drive assembly are connected in parallel between the positive and negative terminals of the power supply module. A charge / discharge circuit in which one end of the first switch module is connected to the first drive assembly, and the other end of the first switch module is connected to the second drive assembly.

2. The first drive assembly includes a first motor, and the second drive assembly includes a second motor controller. The first drive assembly and the second drive assembly are connected in parallel between the positive and negative terminals of the power supply module. The charge / discharge circuit according to claim 1, wherein one end of the first switch module is connected to the neutral point of the first motor, and the other end of the first switch module is connected to the upper and lower bridge arm connection point of at least one bridge arm of the second motor controller.

3. The charge / discharge circuit according to any one of claims 1 to 2, wherein the first switch module includes a main switch and a plurality of sub-switches, the number of the plurality of sub-switches being less than or equal to the number of bridge arms in the second motor controller, the first end of the main switch being connected to the neutral point of the first motor, the first end of each sub-switch being connected to the second end of the main switch, and the second end of each sub-switch being connected to the upper and lower bridge arm connection point of a different bridge arm in the second motor controller.

4. The charge / discharge circuit according to any one of claims 1 to 2, wherein the first switch module includes a plurality of subswitches, the number of which is equal to the number of bridge arms in the second motor controller, the first end of each subswitch is connected to the neutral point of the first motor, and the second end of each subswitch is connected in a one-to-one correspondence to the upper and lower bridge arm connection points of different bridge arms in the second motor.

5. The power supply module includes a battery and a battery main control box, the battery main control box is equipped with a positive terminal connector on the power supply side, a positive terminal connector on the drive side, a negative terminal connector on the power supply side, and a negative terminal connector on the drive side. A positive electrode circuit is connected between the positive electrode connector on the power supply side and the positive electrode connector on the drive side, and a negative electrode circuit is connected between the negative electrode connector on the power supply side and the negative electrode connector on the drive side. The positive terminal of the battery is connected to the positive terminal connector on the power supply side, and the negative terminal of the battery is connected to the negative terminal connector on the power supply side. The positive terminal connector on the drive side is connected to the first end of the first drive assembly and the first end of the second drive assembly, respectively. The charge / discharge circuit according to any one of claims 1 to 4, wherein the negative terminal connector on the drive side is connected to the second end of the first drive assembly and the second end of the second drive assembly, respectively.

6. The charge / discharge circuit according to claim 5, wherein a main positive switch and a current sensor are installed in the positive electrode circuit.

7. The positive terminal connector on the drive side includes a first positive terminal subconnector on the drive side and a second positive terminal subconnector on the drive side, the first end of the positive terminal circuit is connected to the positive terminal connector on the power supply side, and the second end of the positive terminal circuit is connected to the first positive terminal subconnector on the drive side and the second positive terminal subconnector on the drive side, respectively. The charge / discharge circuit according to any one of claims 5 to 6, wherein the first positive subconnector on the drive side is connected to the first end of the first drive assembly, and the second positive subconnector on the drive side is connected to the first end of the second drive assembly.

8. The negative terminal connector on the drive side includes a first negative terminal subconnector on the drive side and a second negative terminal subconnector on the drive side. The first end of the negative electrode circuit is connected to the negative electrode connector on the power supply side, and the second end of the negative electrode circuit is connected to the first negative electrode subconnector and the second negative electrode subconnector on the drive side, respectively. The charge / discharge circuit according to any one of claims 5 to 7, wherein the first negative subconnector on the drive side is connected to the second end of the first drive assembly, and the second negative subconnector on the drive side is connected to the second end of the second drive assembly.

9. The battery includes a first sub-battery and a second sub-battery, the power supply side positive terminal connector includes a first positive terminal sub-connector and a second positive terminal sub-connector on the power supply side, and the positive terminal circuit includes a first positive terminal branch circuit and a second positive terminal branch circuit. The first end of the first positive electrode branch circuit is connected to the first positive electrode subconnector on the power supply side, the first end of the second positive electrode branch circuit is connected to the second positive electrode subconnector on the power supply side, and both the second end of the first positive electrode branch circuit and the second end of the second positive electrode branch circuit are connected to the positive electrode connector on the drive side. The positive terminal of the first sub-battery is connected to the first positive terminal sub-connector on the power supply side, and the positive terminal of the second sub-battery is connected to the second positive terminal sub-connector on the power supply side. The charge / discharge circuit according to any one of claims 5 to 8, wherein the negative electrode of the first sub-battery and the negative electrode of the second sub-battery are both connected to the negative electrode connector on the power supply side.

10. The charge / discharge circuit according to any one of claims 5 to 9, wherein the negative terminal connector on the power supply side includes a first negative terminal subconnector on the power supply side and a second negative terminal subconnector on the power supply side, the negative terminal of the first sub-battery is connected to the first negative terminal subconnector on the power supply side, the negative terminal of the second sub-battery is connected to the second negative terminal subconnector on the power supply side, and both the first negative terminal subconnector on the power supply side and the second negative terminal subconnector on the power supply side are connected to the first end of the negative terminal circuit.

11. The charge / discharge circuit according to any one of claims 5 to 10, wherein the positive terminal connector on the drive side includes a first positive terminal subconnector on the drive side and a second positive terminal subconnector on the drive side, the second end of the first positive terminal branch circuit is connected to the first positive terminal subconnector on the drive side, the second end of the second positive terminal branch circuit is connected to the second positive terminal subconnector on the drive side, the first end of the first drive assembly is connected to the first positive terminal subconnector on the drive side, and the first end of the second drive assembly is connected to the second positive terminal subconnector on the drive side.

12. A charge / discharge circuit according to any one of claims 5 to 11, wherein a first current sensor and a first positive branch circuit switch are installed in the first positive branch circuit, and a second current sensor and a second positive branch circuit switch are installed in the second positive branch circuit.

13. The charge / discharge circuit according to any one of claims 5 to 12, wherein the negative electrode circuit is provided with a main-negative switch and a precharge circuit connected in parallel with the main-negative switch.

14. A power consumption device comprising a control device and a charge / discharge circuit according to any one of claims 1 to 13, The control device is communicated to a switch element in the charge / discharge circuit, and the switch element includes at least the first switch module, in a power consumption device.

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