Charging and discharging circuits, battery control circuits, and power consumption devices

Abstract

This application discloses a charge / discharge circuit, a battery control 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. The power supply module includes a battery, the first drive assembly includes a first motor, and the second drive assembly includes a second motor. The first and second drive assemblies are connected in parallel between the positive and negative terminals of the power supply module. The first switch has one end connected to the neutral point of the first motor and the other end connected to the neutral point of the second motor. This application connects the first switch between the neutral points of the two motors, and by controlling the on / off state of the switch in the circuit, switching can be achieved to form different circuit loops, thereby supporting the realization of more functions. Multiple inductors may be connected in series between the neutral points of the two motors, or switches may be connected in parallel to the inductors, thereby flexibly adjusting the inductance connected to the charge / discharge circuit and meeting different battery heating needs by adjusting the circuit structure.

Description

Technical Field

[0001] (Cross - reference to Related Applications) This application claims the priority of Chinese Patent Application No. 202321327947.4, titled "Charge - Discharge Circuit, Battery Control Circuit, and Power - Consumption Device", filed on May 29, 2023, and all the contents of that application are incorporated herein by reference.

[0002] This application relates to the technical field of new - energy transportation vehicles, and specifically, to a charge - discharge circuit, a battery control circuit, and a power - consumption device.

Background Art

[0003] Currently, the dual - motor architecture of new - energy transportation vehicles is very common. This dual - motor architecture includes two motors, and the electrical energy released from the battery is converted into mechanical energy by the two motors, thereby driving the new - energy transportation vehicle to move.

[0004] In the dual - motor architecture according to the related technology, the two motors are connected in parallel, and the circuit connection method is fixed. The function of driving a transportation vehicle with a dual - motor can be realized by a single - circuit structure, but the circuit structure cannot be flexibly changed to realize more functions.

[0005] The above description is only intended to provide background - technical information related to this application and does not necessarily constitute prior art.

Summary of the Invention

[0006] In view of the problems of the above - mentioned related technology, this application provides a charge - discharge circuit, a battery control circuit, and a power - consumption device that can alleviate the problem that the circuit structure of the dual - motor architecture is single and cannot realize more functions.

[0007] A first embodiment of the present invention provides a charge / discharge circuit comprising a power supply module, a first drive assembly, a second drive assembly, and a first switch, wherein the power supply module comprises a battery, the first drive assembly comprises a first motor, the second drive assembly comprises a second motor, 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 is connected to the neutral point of the first motor, and the other end is connected to the neutral point of the second motor, a first neutral wire terminal is provided at the neutral point of the first motor, and a second neutral wire terminal is provided at the neutral point of the second motor, and one end of the first switch is connected to the first neutral wire terminal via a high-voltage wire harness, and the other end is connected to the second neutral wire terminal via a high-voltage wire harness.

[0008] The neutral wires of the first and second motors are drawn out, and the first switch is connected between their neutral wires. In this way, the connection relationship between the first and second motors can be switched using the first switch, thereby enabling the formation of different circuit loops. This allows the single-battery, dual-motor circuit architecture to flexibly change the circuit structure, thereby supporting the realization of more different functions. The first neutral wire terminal is drawn out to the neutral point of the first motor, and the second neutral wire terminal is drawn out to the neutral point of the second motor. In this way, the first switch can be easily connected between the neutral points of the first and second motors via a conductor. In the case of wiring, there is no need to disassemble the cases of the first and second motors to find the location of the neutral points, improving the convenience and efficiency of wiring.

[0009] In some embodiments of this application, the charge / discharge circuit further includes an energy storage element, the energy storage element being connected to a line between the neutral point of the first motor and the neutral point of the second motor, and the energy storage element being connected in series with the first switch.

[0010] By adding this energy storage element, in a scenario where the battery is heated, the element stores electrical energy together with the windings of the first and second motors, increasing the overall energy storage capacity of the circuit system. The stored electrical energy can then be used to charge the battery, and alternating charging and discharging cycles can be performed to heat the battery. The energy storage element increases the alternating current generated throughout the circuit, increasing the amount of heat generated per unit time due to the battery's internal resistance, and thus accelerating the battery's heating rate.

[0011] In some embodiments of this application, the energy storage element includes at least one inductor, and the at least one inductor and the first switch are connected in series to a line between the neutral point of the first motor and the neutral point of the second motor.

[0012] At least one inductor is connected in series between the neutral points of the first motor and the second motor. The series-connected inductors increase the total inductance of the inductors in the entire circuit system in the battery heating scenario, thereby increasing the AC current generated in the charge / discharge circuit and contributing to improved battery heating efficiency.

[0013] In some embodiments of the present application, the charge / discharge circuit further includes at least one second switch, the second switch connected in parallel to at least one of the inductors.

[0014] When the second switch is closed, this is equivalent to connecting the inductor in parallel with a single wire, thereby short-circuiting the inductor. In this case, current flows through the wire connected in parallel with the inductor and not through the inductor itself. By controlling the on / off state of the second switch in this way, the number of inductors connected to the circuit loop can be flexibly controlled, thereby enabling flexible adjustment of the total inductance of the inductors in the entire circuit system. This allows for the configuration of circuit loops that meet control needs by switching the switch, improving the overall flexibility of the circuit architecture and contributing to the realization of more functions in the overall circuit architecture.

[0015] In some embodiments of this application, the second switch corresponds one-to-one with the inductor, and each second switch is connected in parallel to the inductor corresponding to it.

[0016] In this embodiment, each inductor connected in series between the neutral point of the first motor and the neutral point of the second motor has an independent second switch connected in parallel, which further improves the flexibility of adjusting the number of inductors connected to the loop.

[0017] A second embodiment of the present invention provides a battery control circuit, the battery control circuit comprising a first positive connector, a second positive connector, a first negative connector, and a second negative connector, wherein a positive line is connected between the first positive connector and the second positive connector, and a negative line is connected between the first negative connector and the second negative connector, the first positive connector is used to connect to the positive terminal of the battery in the charge / discharge circuit described in the first embodiment, the first negative connector is used to connect to the negative terminal of the battery, the second positive connector is used to connect to the first end of the first drive assembly and the first end of the second drive assembly, respectively in the charge / discharge circuit, and the second negative connector is used to connect to the second end of the first drive assembly and the second end of the second drive assembly, respectively.

[0018] By installing the first positive terminal connector, second positive terminal connector, first negative terminal connector, and second negative terminal connector in the battery control circuit, the positive and negative terminals of the battery can be easily connected to the battery control circuit via wires, and the first and second drive assemblies can also be easily connected to the battery control circuit, improving the convenience of wiring. The battery control circuit can control the connection relationship between the battery and the first and second drive assemblies, and in the event of a circuit abnormality, it can timely disconnect the connection between the battery and other components to protect the battery. The battery control circuit can detect parameters such as the battery current or voltage, contributing to more accurate circuit control, and can also determine whether the circuit is abnormal based on the detected parameters. By applying this battery control circuit to a dual motor architecture circuit, the battery control circuit can flexibly switch the connection relationship between the positive and negative terminals of the battery and other electrical components, thereby contributing to the realization of more functions.

[0019] In some embodiments of this application, the positive electrode line is provided with a main positive electrode switch and a pre-charge circuit connected in parallel to the main positive electrode switch.

[0020] The aforementioned negative electrode line is equipped with a main negative electrode switch and a current sensor.

[0021] By installing the pre-charge circuit on the positive electrode line, more space is left for the negative electrode line, allowing for the installation of other components or wiring in the remaining space. By controlling the main positive and main negative electrode switches, the circuit between the battery and other components can be made conductive or disconnected. In the event of a circuit failure, the circuit between the battery and other components can be easily disconnected, thereby protecting the battery. The magnitude of the current flowing through the battery can be detected by a current sensor. Based on the detected current, it is possible to determine whether or not a circuit failure has occurred, and to adjust several control processes based on the current.

[0022] In some embodiments of this application, a main positive switch and a current sensor are installed in the positive electrode line.

[0023] The negative electrode line is equipped with a main negative electrode switch and a pre-charge circuit connected in parallel to the main negative electrode switch.

[0024] This installation method leaves more space for the positive electrode line, allowing for the installation of other components or wiring in the remaining space.

[0025] In some embodiments of the present application, the second positive connector includes a first positive subconnector and a second positive subconnector, the positive line includes a first positive branch and a second positive branch, the first positive branch is connected between the first positive subconnector and the first positive connector, the second positive branch is connected between the second positive subconnector and the first positive connector, the first positive subconnector is connected to the first end of the first drive assembly, and the second positive subconnector is connected to the first end of the second drive assembly.

[0026] According to this embodiment, the positive electrode line is divided into a first positive electrode branch and a second positive electrode branch, and is respectively connected to the first end of the first drive assembly via the first positive electrode sub-connector and to the first end of the second drive assembly via the second positive electrode sub-connector. In this way, the first drive assembly and the second drive assembly are respectively connected to different connectors, and there is no 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 and connect them to the same connector, improving the convenience of wiring. Furthermore, in this way, the first drive assembly and the second drive assembly may be independently connected to different branches. When a fault occurs in the branch where one drive assembly is located or in one drive assembly, the other branch or the normal operation of the other drive assembly can supply kinetic energy to the power-consuming device, thereby improving the reliability of the circuit operation and enhancing the fault tolerance performance of the entire circuit architecture.

[0027] In some embodiments of the present application, a first branch switch is connected to the first positive electrode branch, a precharge circuit is connected to the second positive electrode branch, the precharge circuit is connected in parallel with the first branch switch, and a second branch switch is further connected between the precharge circuit and the second positive electrode sub-connector in the second positive electrode branch. A main negative electrode switch and a current sensor are installed on the negative electrode line.

[0028] By providing a pre-charge circuit in the second positive electrode branch, more space for the negative electrode line is left, contributing to installing other components or wiring in the remaining space. By controlling the first branch switch, the circuit between the battery and the first drive assembly can be conducted or cut off. By controlling the second branch switch, the circuit between the battery and the second drive assembly can be conducted or cut off. When a failure occurs in the first drive assembly, the first branch switch can be controlled to turn off, thereby achieving the effect of protecting the battery. When a failure occurs in the second drive assembly, the second branch switch can be controlled to turn off, thereby achieving the effect of protecting the battery. Further, since the connections between the first drive assembly and the second drive assembly and the positive electrode are independent of each other, even if a failure occurs in one drive assembly, it does not affect the operation of the other drive assembly, thereby improving the fault tolerance performance of the entire circuit structure.

[0029] In some embodiments of the present application, a first branch switch and a current sensor are connected to the first positive electrode branch, a second branch switch and a current sensor are connected to the second positive electrode branch, and a main negative electrode switch and a pre-charge circuit connected in parallel to the main negative electrode switch are installed on the negative electrode line.

[0030] By installing a pre-charge circuit on the negative electrode line, more space for the positive electrode line is left, contributing to installing other components or wiring in the remaining space. By installing the first branch switch and the second branch switch, the connections between the first drive assembly and the second drive assembly and the positive electrode of the battery are independent of each other. Even if a failure occurs in one drive assembly, it does not affect the operation of the other drive assembly, thereby improving the fault tolerance performance of the entire circuit structure.

[0031] In some embodiments of the present application, the second negative electrode connector includes a first negative electrode subconnector and a second negative electrode subconnector, the negative electrode line includes a first negative electrode branch and a second negative electrode branch, the first negative electrode branch is connected between the first negative electrode subconnector and the first negative electrode connector, the second negative electrode branch is connected between the second negative electrode subconnector and the first negative electrode connector, the first negative electrode subconnector is connected to the second end of the first drive assembly, and the second negative electrode subconnector is connected to the second end of the second drive assembly.

[0032] In this embodiment, the negative electrode line is divided into a first negative electrode branch and a second negative electrode branch, each connected to the second end of the first drive assembly via a first negative electrode subconnector, and to the second end of the second drive assembly via a second negative electrode subconnector. In this way, the second ends of the first drive assembly and the second drive assembly are connected to different connectors, eliminating the need to bundle the conductors at the second end of the first drive assembly and the conductors at the second end of the second drive assembly and connect them to the same connector, thus improving the convenience of wiring.

[0033] In some embodiments of this application, a third branch switch is connected to the first negative branch, a precharge circuit is connected to the second negative branch, the precharge circuit is connected in parallel to the third branch switch, and a main positive switch and a current sensor are installed on the positive line.

[0034] By providing the pre-charge circuit at the second negative terminal branch, more space is left for the positive terminal line, allowing for the installation of other components or wiring in the remaining space. The circuit between the battery and the first drive assembly can be opened or closed by controlling the third branch switch, and the circuit between the battery and the second drive assembly can be opened or closed by controlling the fourth branch switch. If a failure occurs in the first drive assembly, the third branch switch can be controlled to turn off, thereby protecting the battery. If a failure occurs in the second drive assembly, the fourth branch switch can be controlled to turn off, also thereby protecting the battery. Furthermore, since the connections between the first and second drive assemblies and the negative terminal are independent of each other, a failure in one drive assembly does not affect the operation of the other drive assembly, thereby improving the fault tolerance performance of the entire circuit structure.

[0035] In some embodiments of this application, a third branch switch and a current sensor are connected to the first negative branch, a fourth branch switch and a current sensor are connected to the second negative branch, and a main positive switch and a precharge circuit connected in parallel to the main positive switch are installed on the positive line.

[0036] This installation method leaves more space for the negative electrode line, allowing for the installation of other components and wiring in the remaining space. By installing the third and fourth branch switches, the connections between the first and second drive assemblies and the positive electrode become independent of each other, so that even if one drive assembly fails, it does not affect the operation of the other drive assembly, thereby improving the fault tolerance performance of the entire circuit structure.

[0037] In some embodiments of the present application, the second positive connector includes a first positive subconnector and a second positive subconnector, the second negative connector includes a first negative subconnector and a second negative subconnector, a first positive branch is connected between the first positive subconnector and the first positive connector, a second positive branch is connected between the second positive subconnector and the first positive connector, a first negative branch is connected between the first negative subconnector and the first negative connector, a second negative branch is connected between the second negative subconnector and the first negative connector, the first positive subconnector is connected to the first end of the first drive assembly, the second positive subconnector is connected to the first end of the second drive assembly, the first negative subconnector is connected to the second end of the first drive assembly, and the second negative subconnector is connected to the second end of the second drive assembly.

[0038] In this embodiment, the battery control circuit has a total of six connectors: a first positive connector, a first positive subconnector, a second positive subconnector, a first negative connector, a first negative subconnector, and a second negative subconnector. The first drive assembly is connected to the battery control circuit via the first positive subconnector and the first negative subconnector, and thereby connected to the battery. The second drive assembly is connected to the battery control circuit via the second positive subconnector and the second negative subconnector, and thereby connected to the battery. In such a connection structure, the first and second drive assemblies are each connected to the battery via mutually independent circuit branches. On the one hand, the layout and connections of the lines in the circuit become more orderly. On the other hand, even if a failure occurs in one branch, it does not affect the operation of the other branch, so power-consuming equipment can maintain the availability of the equipment even if a failure occurs in one branch, thereby improving the fault tolerance performance of the circuit architecture.

[0039] In some embodiments of this application, a first branch switch is connected to the first positive branch, a precharge circuit is connected to the second positive branch, the precharge circuit is connected in parallel to the first branch switch, a third branch switch and a current sensor are connected to the first negative branch, and a fourth branch switch and a current sensor are connected to the second negative branch.

[0040] In this embodiment, by providing the precharge circuit at the second positive electrode branch, more space is left for the negative electrode line, which helps to install other components or wire in the remaining space. The circuit between the battery and the first drive assembly can be made to conduct or to disconnect by controlling the first branch switch or the third branch switch, and the circuit between the battery and the second drive assembly can be made to conduct or to disconnect by controlling the second branch switch or the fourth branch switch. If a failure occurs in the first drive assembly, the first branch switch and / or the third branch switch can be controlled to turn off, thereby achieving the effect of protecting the battery. If a failure occurs in the second drive assembly, the second branch switch and / or the fourth branch switch can also be controlled to turn off, thereby achieving the effect of protecting the battery. The magnitude of the current in the circuit branch where the first drive assembly is located can be detected by a current sensor on the first negative electrode branch, and the magnitude of the detected current helps to determine whether or not a failure has occurred in the circuit branch where the first drive assembly is located. The magnitude of the current in the circuit branch where the second drive assembly is located can be detected by a current sensor on the second negative terminal branch. The detected magnitude of the current helps determine whether or not a fault has occurred in the circuit branch where the second drive assembly is located.

[0041] In some embodiments of this application, a first branch switch and a current sensor are connected to the first positive branch, a second branch switch and a current sensor are connected to the second positive branch, a third branch switch is connected to the first negative branch, a precharge circuit is connected to the second negative branch, and the precharge circuit is connected in parallel to the third branch switch.

[0042] In this embodiment, by providing the precharge circuit at the second negative electrode branch, more space is left for the positive electrode line, which helps to install other components or wire in the remaining space. This circuit structure allows for easy control of the connection relationship between the first and second drive assemblies and the battery. If a failure occurs in the first and / or second drive assembly, the connection relationship between the battery and the failed component can be interrupted by controlling the switch, thereby protecting the battery.

[0043] A third embodiment of the present invention provides a power consuming device, the power consuming device comprising a control device, a charge / discharge circuit as described in the first embodiment, and a battery control circuit as described in the second embodiment, wherein the charge / discharge circuit is connected to the battery control circuit, the control device is communicated to switch elements in the charge / discharge circuit and the battery control circuit, and the switch elements include at least a first switch in the charge / discharge circuit.

[0044] The above description is merely an outline of the technical concept of the embodiments of this application. In order to better understand the technical concept of the embodiments of this application, and to make the above and other objectives, features, and advantages of this application clearer and easier to understand, specific embodiments of this application are listed below.

[0045] For those skilled in the art, various other advantages and benefits will become clear by reading the detailed description of the embodiments below. The drawings are for illustrative purposes only and should not be considered limiting to this application. In all drawings, the same components are denoted by the same reference numerals. [Brief explanation of the drawing]

[0046] [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 partial circuit structure between the first motor and the second motor according to one or more embodiments. [Figure 5] This is a schematic diagram of the partial circuit structure between the first motor and the second motor according to one or more embodiments. [Figure 6] This is a schematic diagram of the partial circuit structure between the first motor and the second motor according to one or more embodiments. [Figure 7] This is a schematic diagram of the connection structure between a charge / discharge circuit and a battery control circuit according to one or more embodiments. [Figure 8] This is a schematic diagram of the structure of a battery control circuit according to one or more embodiments. [Figure 9] This is a schematic diagram of the structure of a battery control circuit according to one or more embodiments. [Figure 10] This is a schematic diagram of the connection structure between a charge / discharge circuit and a battery control circuit according to one or more embodiments. [Figure 11] This is a schematic diagram of the connection structure between a charge / discharge circuit and a battery control circuit according to one or more embodiments. [Figure 12] This is a schematic diagram of the connection structure between a charge / discharge circuit and a battery control circuit according to one or more embodiments. [Figure 13] This is a schematic diagram of the connection structure between a charge / discharge circuit and a battery control circuit according to one or more embodiments. [Figure 14] This is a schematic diagram of the connection structure between a charge / discharge circuit and a battery control circuit according to one or more embodiments. [Figure 15] This is a schematic diagram of the connection structure between a charge / discharge circuit and a battery control circuit according to one or more embodiments. [Figure 16] This is a schematic diagram of the connection structure between a charge / discharge circuit and a battery control circuit according to one or more embodiments. [Figure 17] 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]

[0047] The meanings of the symbols in the above drawings are as follows: 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, 5: First Neutral Wire Terminal, 6: Second Neutral Wire Terminal, 7: Energy Storage Element, 8: Second Switch, 9: Battery Control Circuit, 10: Positive Line, 11: Negative Line, 12: Main Positive Switch, 13: Precharge Circuit, 14: Main Negative Switch, 15: Current Sensor, 16: First Branch Switch, 17: Second Branch Switch, 18: 3-way switch, 19: 4th-way switch, 20: control device, 21: 1st motor, 22: 1st motor controller, 31: 2nd motor, 32: 2nd motor controller, 91: 1st positive connector, 92: 2nd positive connector, 93: 1st negative connector, 94: 2nd negative connector, 921: 1st positive subconnector, 922: 2nd positive subconnector, 941: 1st negative subconnector, 942: 2nd negative subconnector, 101: 1st positive branch, 102: 2nd positive branch, 111: 1st negative branch, 112: 2nd negative branch.

[0048] The embodiments of the technical proposal of this application will be described in detail below with reference to the drawings. The following embodiments are merely examples, provided to more clearly illustrate the technical proposal of this application, and do not limit the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application pertains. The terms used herein are for illustrative purposes only and are not intended to limit this application. The terms “including” and “having” and any variations thereof in the description and claims of this application, as well as in the description of the drawings, are intended to intentionally cover the non-exclusive “including.”

[0050] In the description of the embodiments of this application, technical terms such as “first,” “second,” etc., are intended solely to distinguish different subjects and should not be understood as indicating or implying relative importance, or implicitly indicating the number, specific order, or hierarchical relationship of the indicated technical features. In the description of the embodiments of this application, unless otherwise explicitly limited, “multiple” means two or more.

[0051] As used herein, “Examples” means that certain features, structures, or properties described in combination with the Examples may be included in at least one Example of this Application. The phrase “Examples” appearing in various places in the Specification does not necessarily refer to the same Example, nor do they represent mutually exclusive, independent, or substitutable Examples. Those skilled in the art will understand, both explicitly and implicitly, that the Examples described herein can be combined with other Examples.

[0052] In the description of the embodiments of this application, the term "and / or" is merely used to describe the relationship between related objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists, A and B exist simultaneously, or B exists. In this specification, the letter " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0053] In the description of the embodiments of this application, the term "multiple" means two or more (including two), similarly, "multiple groups" means two or more groups (including two groups), and "multiple sheets" means two or more (including two sheets).

[0054] 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 easily describing and simplifying the embodiments of this application. They do not indicate or imply that the shown devices or elements necessarily have a specific orientation or are constructed and operated in a specific orientation, and therefore should not be understood as limiting this application.

[0055] In the description of the embodiments of this application, unless otherwise explicitly defined and limited, technical terms such as “attachment,” “connection,” “linking,” and “fixing” should be understood in a broad sense, for example, a fixed connection, a removable or integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or internal communication or interaction between two elements. Those skilled in the art will be able to understand the specific meaning of the above terms in the embodiments of this application depending on the specific circumstances.

[0056] Currently, power-consuming devices such as electric vehicles, ships, or spacecraft that are driven using dual motors are very common. These devices are powered by batteries, and two motors drive the devices by converting the electrical energy from the batteries into mechanical energy.

[0057] While the single-battery, dual-motor circuit architecture using related technologies can improve the performance of power-consuming devices by driving them with dual motors, the structure of this circuit architecture is single and cannot switch between different circuit loops, thus limiting the implementation of more functions.

[0058] Based on this, embodiments of the present application provide a charge / discharge circuit comprising a power supply module, a first drive assembly, a second drive assembly, and a first switch. The power supply module includes one battery, the first drive assembly includes a first motor, and the second drive assembly includes a second motor. 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 is connected to the neutral point of the first motor, and the other end is connected to the neutral point of the second motor.

[0059] The neutral wires of the first and second motors are drawn out, and a first switch is connected between the neutral wires of both. In this way, the connection relationship between the first and second motors can be switched by the first switch, thereby enabling the formation of different circuit loops. This allows the single-battery, dual-motor circuit architecture to flexibly change the circuit structure, thereby supporting the realization of more different functions.

[0060] The battery in the embodiments of this application may include single cells, battery modules, or battery packs, but the embodiments of this application do not limit the size of the battery. This battery may be a power battery such as a lithium battery, lead-acid battery, nickel-cadmium battery, or sodium-sulfur battery.

[0061] The charge / discharge circuit according to the embodiment of this application can achieve different functions by flexibly switching the circuit structure. For example, when the first switch is off, it converts electrical energy to mechanical energy through the formed circuit loop, driving and moving the power-consuming device on which the charge / discharge circuit is located. Alternatively, when the first switch is closed, it achieves charging and discharging between the battery and the windings of the two motors through the formed circuit loop, creating an alternating current in the loop, thereby generating heat in the battery's internal resistance and achieving the effect of heating the battery. When the first switch is closed, it is also possible to switch between more different circuit loops and achieve more different functions by controlling the on / off state of different switch transistors in the motor controllers corresponding to each of the two motors.

[0062] Embodiments of this application further provide power-consuming devices using the above-described charge / discharge circuit, which may, but are not limited to, electric toys, power tools, electric motorcycles, electric vehicles, ships, spacecraft, etc. By using the charge / discharge circuit disclosed in this application, power-consuming devices can control the on / off state of each switch transistor in the first switch and motor controller according to the needs, thereby flexibly switching the charge / discharge circuit to configure different circuit loops and realize different functions.

[0063] For the sake of explanation, the following embodiments will be described using the example that the power-consuming device in one embodiment of this application is a vehicle 1000.

[0064] Referring to Figure 1, which is a schematic diagram of the structure of a vehicle 1000 according to several embodiments of the present application, the vehicle 1000 may be a new energy vehicle, which may be a pure electric vehicle or an extended-range vehicle, etc. A battery 100 is installed inside the vehicle 1000, and the battery 100 may be installed at the bottom, front, or rear of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 can function 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 being used to control the battery 100 to power the motor 300 for, for example, starting the vehicle 1000, navigation, and operating power consumption needs while driving.

[0065] Battery 100 can also serve as the power source for vehicle 1000, supplying it with driving power. Motor 300 converts the electrical energy output from battery 100 into mechanical energy to drive and move vehicle 1000.

[0066] 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.

[0067] Referring to Figure 2, schematic diagrams of the structure of a charge / discharge circuit according to several embodiments of this application are shown, and as shown in Figure 2, 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 4.

[0068] Here, the power supply module 1 includes a battery 100, the first drive assembly 2 includes a first motor 21, and the second drive assembly 3 includes a second motor 31. 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 4 is connected to the neutral point of the first motor 21, and the other end of the first switch 4 is connected to the neutral point of the second motor 31.

[0069] The power supply module 1 described above 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 on the power-consuming equipment to which the charge / discharge circuit 400 belongs that require power. The battery 100 included in the power supply module 1 may be a single 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 group of batteries formed by connecting multiple batteries in series and / or in parallel.

[0070] The first drive assembly 2 and the second drive assembly 3 are energy conversion modules for converting electrical energy output from a battery 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 may further include a second motor controller 32 connected to the second motor 31. The motor controllers are used to convert the DC current output from the battery into the AC current required for the motor, and the motors are used to convert the electrical energy of the input AC current into mechanical energy. Here, the first motor controller 22 and the second motor controller 32 are not shown in Figure 1, but they are shown in Figure 7.

[0071] The first motor 21 and the second motor 31 described above may be motors with any number of phases, such as 3-phase, 4-phase, or 6-phase motors. The number of phases of the first motor 21 and the second motor 31 may be the same or different. Both the first motor controller 22 and the second motor controller 32 include multiple bridge arms, the number of bridge arms in the first motor controller 22 being equal to the number of phases of the first motor 21, and the number of bridge arms in the second motor controller 32 being equal to the number of phases of the second motor 31. 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 one-to-one to the windings of each phase in the first motor 21, and the connection point between the upper and lower bridge arms in the bridge arm is connected to the winding of the corresponding phase in the first motor 21. The connection method between the bridge arms in the second motor controller 32 and the windings in the second motor 31 is the same, so a detailed explanation is omitted. Switch transistors are installed in the upper and lower bridge arms of the above-mentioned bridge arms, and these switch transistors may be IGBT (Insulated Gate Bipolar Translator) transistors.

[0072] The first switch 4 may be a relay or an IGBT transistor, and the embodiments of this application do not limit the device selected for the first switch 4 to any specific device. Any device that can realize the function of conducting or interrupting a circuit and can automatically control its conduction and interruption by a signal can be used as the first switch 4.

[0073] 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. As a result, the battery 100 in 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.

[0074] In this charge / discharge circuit 400, the first switch 4 is connected between the neutral point of the first motor 21 and the neutral point of the second motor 31. The neutral point of the motor is the connection point of all the windings in the motor, and the first switch 4 is connected between the neutral point of the first motor 21 and the neutral point of the second motor 31. When the first switch 4 is turned off, a circuit loop 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. The power supply module 1 with this circuit structure supplies power to the first drive assembly 2 and the second drive assembly 3, and the first motor 21 of the first drive assembly 2 and the second motor 31 of the second drive assembly 3 convert the electrical energy output from the battery 100 into mechanical energy, thereby realizing the function of driving and moving power-consuming devices.

[0075] When the first switch 4 is closed, a circuit loop 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 alternating charging and discharging of the battery 100 in the power supply module 1 and the windings in the first motor 21 and the second motor 31. This generates an alternating current within the circuit loop, thereby causing the internal resistance of the battery to heat up and achieving the effect of heating the battery.

[0076] When the first switch 4 is closed, and by controlling the on / off switching of different bridge arms in the first motor controller 22 and the second motor controller 32, the number of motor windings connected to the circuit loop can be adjusted, enabling more diverse changes in the circuit structure and thereby realizing more functions to meet the various control needs of power-consuming equipment.

[0077] A first switch 4 is connected between the neutral points of the first motor 21 and the second motor 31. In this way, the connection relationship between the first motor 21 and the second motor 31 can be switched by the first switch 4, thereby enabling switching and forming different circuit loops. This allows the circuit architecture to flexibly change the circuit structure, thereby supporting the realization of more different functions.

[0078] In some embodiments of this application, in the schematic diagram of the charge / discharge circuit 400 shown in Figure 3, a first neutral wire terminal 5 is installed at the neutral point of the first motor 21, and a second neutral wire terminal 6 is installed at the neutral point of the second motor 31. One end of the first switch 4 is connected to the first neutral wire terminal 5 via a high-voltage wire harness, and the other end of the first switch 4 is connected to the second neutral wire terminal 6 via a high-voltage wire harness.

[0079] The first neutral wire terminal 5 is connected to the neutral point of the first motor 21, and the second neutral wire terminal 6 is connected to the neutral point of the second motor 31. In this way, the first switch 4 can be easily connected between the neutral points of the first motor 21 and the second motor 31 via the wires. When wiring, there is no need to disassemble the cases of the first motor 21 and the second motor 31 to find the location of the neutral points, improving the convenience and efficiency of wiring.

[0080] Based on each embodiment of this application, as shown in Figure 3, the charge / discharge circuit 400 further includes an energy storage element 7, which is connected to a line between the neutral point of the first motor 21 and the neutral point of the second motor 31, and is connected in series with the first switch 4.

[0081] The energy storage element 7 is used to store electrical energy, and in a scenario where the first switch 4 is closed and a charge / discharge circuit for heating the battery 100 is formed, during the discharge process of the battery 100, the energy storage element 7 stores electrical energy together with the windings in the first motor 21 and the second motor 31. During the charging process of the battery 100, the energy storage element 7 charges the battery 100 together with the windings in the first motor 21 and the second motor 31.

[0082] By adding this energy storage element 7, in a scenario where the battery 100 is heated, the energy storage element 7 stores electrical energy together with the windings in the first motor 21 and the second motor 31, increasing the total energy storage capacity of the circuit system. The stored electrical energy is then used to charge the battery 100, and the battery 100 can be heated by alternating charging and discharging. The energy storage element 7 increases the alternating current generated throughout the circuit, increases the amount of heat generated per unit time due to the battery's internal resistance, and speeds up the battery's heating rate.

[0083] In some embodiments of this application, as shown in Figure 3, the energy storage element 7 includes at least one inductor L. At least one inductor L and the first switch 4 are connected in series to the line between the neutral point of the first motor 21 and the neutral point of the second motor 31. In Figure 3, one inductor L is schematically depicted. Figure 4 is a schematic diagram of a subcircuit of the connection structure between the first motor 21 and the second motor 31, where both the first motor 21 and the second motor 31 are shown as three-phase motors, the first motor 21 includes three windings A1, B1, and C1, and the second motor 31 includes three windings A2, B2, and C2. In Figure 4, three inductors L1, L2, and L3 are connected in series between the neutral point of the first motor 21 and the neutral point of the second motor 31, and in embodiments of this application, the number of inductors connected in series is not limited.

[0084] At least one inductor is connected in series between the neutral points of the first motor 21 and the second motor 31. The series-connected inductors increase the total inductance of the inductors in the entire circuit system in the battery heating scenario, thereby increasing the AC current generated in the charge / discharge circuit and contributing to improved battery heating efficiency.

[0085] In some other embodiments of this application, the charge / discharge circuit 400 further includes at least one second switch 8, which is connected in parallel to at least one inductor L. The number of second switches 8 may be less than or equal to the number of the at least one inductor L. The second switch 8 is a switch that can be automatically controlled on or off by a signal, and for example, the second switch 8 may be a relay or an IGBT transistor, etc.

[0086] Figure 5 schematically shows two second switches, K1 and K2, where K1 is connected in parallel to inductor L1, and K2 is connected in parallel to the series branch of inductors L2 and L3. In the embodiments of this application, the number of second switches 8 and the specific parallel connection relationships between the second switches 8 and each inductor are not limited.

[0087] When the first switch 4 is closed, current flows through the line between the neutral point of the first motor 21 and the neutral point of the second motor 31. In this line, the second switch 8 is connected in parallel with the inductor L, so when the second switch 8 is closed, current flows through the inductor L. When the second switch 8 is closed, this is equivalent to short-circuiting the inductor L by connecting it in parallel with a single wire, in which case current flows through the wire connected in parallel with the inductor L and does not flow through the inductor L itself. By controlling the on / off state of the second switch 8 in this way, the number of inductors L connected to the circuit loop can be flexibly controlled, thereby enabling flexible adjustment of the total inductance of the entire circuit system. This allows for the formation of circuit loops that meet control needs by switching the switch, improving the flexibility of the overall circuit architecture and contributing to the realization of more functions in the overall circuit architecture.

[0088] In some embodiments of this application, a second switch 8 connected between the neutral point of the first motor 21 and the neutral point of the second motor 31 corresponds one-to-one with an inductor L, and each second switch 8 is connected in parallel to its corresponding inductor L. As shown in Figure 6, three second switches K1, K2, and K3 are schematically depicted, where K1 is connected in parallel to inductor L1, K2 is connected in parallel to inductor L2, and K3 is connected in parallel to inductor L3.

[0089] In this embodiment, a second switch 8 is independently connected in parallel to each inductor L connected in series between the neutral point of the first motor 21 and the neutral point of the second motor 31, thus further improving the flexibility of adjusting the number of inductors connected in the loop.

[0090] In the embodiments of this application, the neutral wires of the first motor 21 and the second motor 31 are drawn out, and a first switch 4 is connected between their neutral points. The connection relationship between the first motor 21 and the second motor 31 can be switched by the first switch 4, thereby enabling switching to form different circuit loops and flexibly changing the circuit structure, thereby supporting the realization of more different functions. Multiple inductors may also be connected in series between the neutral points of the two motors, or switches may be connected in parallel to the inductors, thereby flexibly adjusting the inductance connected to the charge / discharge circuit and meeting different battery heating needs by adjusting the circuit structure.

[0091] The above descriptions of each embodiment tend to highlight the differences between them, and their similarities or similarities may be referenced to one another. For the sake of brevity, detailed descriptions are omitted in this specification.

[0092] Some embodiments of this application further provide a battery control circuit, and Figure 7 shows a schematic diagram of the connection between the battery control circuit 9 and the charge / discharge circuit 400, as shown in Figure 7, the battery control circuit 9 includes a first positive electrode connector 91, a second positive electrode connector 92, a first negative electrode connector 93, and a second negative electrode connector 94. A positive electrode line 10 is connected between the first positive electrode connector 91 and the second positive electrode connector 92, and a negative electrode line 11 is connected between the first negative electrode connector 93 and the second negative electrode connector 94.

[0093] The first positive connector 91 is used to connect to the positive terminal of the battery 100 in the charge / discharge circuit 400 according to each of the above embodiments, and the first negative connector 93 is used to connect to the negative terminal of the battery 100. The second positive connector 92 is used to connect to the first end of the first drive assembly 2 and the first end of the second drive assembly 3 in the charge / discharge circuit 400, respectively. The second negative connector 94 is used to connect to the second end of the first drive assembly 2 and the second end of the second drive assembly 3, respectively.

[0094] The first end of the first drive assembly 2 is connected to the positive terminal of the battery 100, and the second end of the first drive assembly 2 is connected to the negative terminal of the battery 100. The first drive assembly 2 includes a first motor controller 22, the upper bridge arm of each bridge arm of the first motor controller 22 is connected to the same wire, and this wire can function as the first end of the first drive assembly 2. The lower bridge arm of each bridge arm of the first motor controller 22 is connected to the same wire, and this wire can function as the second end of the first drive assembly 2. The first end of the second drive assembly 3 is connected to the positive terminal of the battery 100, and the second end of the second drive assembly 3 is connected to the negative terminal of the battery 100. The second drive assembly 3 includes a second motor controller 32, the upper bridge arm of each bridge arm of the second motor controller 32 is connected to the same wire, and this wire can function as the first end of the second drive assembly 3. The lower bridge arms of each bridge arm of the first motor controller 32 are connected to the same wire, which can function as the second end of the first drive assembly 3.

[0095] Here, the first motor controller 22 included in the first drive assembly 2 in Figure 7 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.

[0096] The battery control circuit 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 communication between the battery 100 and the first drive assembly 2 or the connection between the battery 100 and the first drive assembly 2, and controls the communication between the battery 100 and the second drive assembly 3 or the connection between the battery 100 and the second drive assembly 3. The battery control circuit 9 may also be used to detect the magnitude of the current flowing through the positive electrode line 10 or the negative electrode line 11, or the magnitude of the voltage across the positive and negative electrodes of the battery 100.

[0097] Specifically, the first end of the first motor controller 22 in the first drive assembly 2 is connected to the second positive connector 92, and the second end of the first motor controller 22 is connected to the second negative connector 94. The upper bridge arms of each bridge arm in the first motor controller 22 are connected in common, and each upper bridge arm is connected to each other and connected to the second positive connector 92. The lower bridge arms of each bridge arm are connected in common, and each lower bridge arm is connected to each other and connected to the second negative connector 94.

[0098] The first end of the second motor controller 32 in the second drive assembly 3 is connected to the second positive connector 92, and the second end of the second motor controller 32 is connected to the second negative connector 94. The upper bridge arms of each bridge arm in the second motor controller 32 are connected in common, and each upper bridge arm is connected to each other and connected to the second positive connector 92. The lower bridge arms of each bridge arm are connected in common, and each lower bridge arm is connected to each other and connected to the second negative connector 94.

[0099] The battery control circuit 9 is equipped with the first positive terminal connector 91, the second positive terminal connector 92, the first negative terminal connector 93, and the second negative terminal connector 94. The positive and negative terminals of the battery 100 can be easily connected to the battery control circuit 9 via wires, and the first drive assembly 2 and the second drive assembly 3 can also be easily connected to the battery control circuit 9, improving the convenience of wiring. The battery control circuit 9 can control the connection relationship between the battery 100 and the first drive assembly 2 and the second drive assembly 3, and if a circuit abnormality occurs, it can cut off the connection between the battery 100 and other components in a timely manner, thereby protecting the battery 100. The battery control circuit 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 a circuit abnormality has occurred based on the detected parameters. By applying this battery control circuit 9 to a dual motor architecture circuit, the battery control circuit 9 can flexibly switch the connection relationship between the positive and negative terminals of the battery 100 and other electrical components, thereby contributing to the realization of more functions.

[0100] In some embodiments of this application, as shown in the schematic diagram of the battery control circuit 9 in Figure 8, a main positive electrode switch 12 and a pre-charge circuit 13 connected in parallel to the main positive electrode switch 12 are installed on the positive electrode line 10, and a main negative electrode switch 14 and a current sensor 15 are installed on the negative electrode line 11.

[0101] Here, the main positive switch 12 may be a switch whose on / off state can be controlled by a signal, for example, the main positive switch 12 may be a relay or an IGBT transistor, and the main positive switch 12 shown in Figure 8 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 can be 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, and to reduce overheating burnout of the main positive switch 12 and the main negative switch 14 due to overcurrent.

[0102] As shown in Figure 7, the first motor controller 22 included in the first drive assembly 2 has a capacitor C1 connected in parallel to each bridge arm, and the second motor controller 32 included in the second drive assembly 3 has a capacitor C2 connected in parallel to each bridge arm. This pre-charge circuit 13 may also be used to protect capacitors C1 and C2 in the event of overvoltage or overcurrent in the circuit and to reduce damage to capacitors C1 and C2. A current sensor 15 installed on the negative electrode line 11 is used to detect the magnitude of the current flowing through the battery 100.

[0103] By installing the pre-charge circuit 13 on the positive electrode line 10, more space is left for the negative electrode line 11, which helps to install other components or wire in the remaining space. By controlling the main positive electrode switch 12 and the main negative electrode switch 14, the circuit between the battery 100 and other components can be made to conduct or to interrupt. In the event of a circuit failure, the circuit between the battery 100 and other components can be easily interrupted, thereby protecting the battery 100. The magnitude of the current flowing through the battery 100 can be detected by the current sensor 15. Based on the detected current, it is possible to determine whether or not a circuit failure has occurred, and to adjust several control processes based on the current.

[0104] In some other embodiments of this application, as shown in Figure 9, the positive electrode line 10 is equipped with a main positive electrode switch 12 and a current sensor 15. The negative electrode line 11 is equipped with a main negative electrode switch 14 and a pre-charge circuit 13 connected in parallel to the main negative electrode switch 14. In Figure 9, both the main positive electrode switch 12 and the main negative electrode switch 14 are in the closed position.

[0105] The difference between the structure shown in Figure 9 and the structure shown in Figure 8 is that the pre-charge circuit 13 is installed on the negative electrode line 11, while the current center 15 is installed on the positive electrode line 10. In these two embodiments, in actual applications, it is possible to decide whether to install the pre-charge circuit 13 on the positive electrode line 10 or the negative electrode line 11, depending on the wiring needs of the actual product. This installation leaves more space for the positive electrode line 10, which helps to install other components or to wire in the remaining space.

[0106] In some embodiments of this application, in the schematic diagram of the connection between the charge / discharge circuit 400 and the battery control circuit 9 shown in Figure 10, the second positive electrode connector 92 includes a first positive electrode subconnector 921 and a second positive electrode subconnector 922, and the positive electrode line 10 includes a first positive electrode branch 101 and a second positive electrode branch 102. The first positive electrode branch 101 is connected between the first positive electrode subconnector 921 and the first positive electrode connector 91, and the second positive electrode branch 102 is connected between the second positive electrode subconnector 922 and the first positive electrode connector 91. The first positive electrode subconnector 921 is connected to the first end of the first drive assembly 2, and the second positive electrode subconnector is connected to the first end of the second drive assembly 3.

[0107] In this embodiment, the positive electrode line 10 is divided into a first positive electrode branch 101 and a second positive electrode branch 102, which are connected to the first end of the first drive assembly 2 via the first positive electrode subconnector 921 and to the first end of the second drive assembly 3 via the second positive electrode subconnector 922, respectively. In this way, the first drive assembly 2 and 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 conductors at the first end of the second drive assembly 3 and connect them to the same connector, thus improving wiring convenience. Furthermore, since the first drive assembly 2 and the second drive assembly 3 are independently connected to different branches, if a failure occurs in the branch where one drive assembly is located or in one drive assembly, the normal operation of the other branch or the other drive assembly can supply kinetic energy to the power-consuming equipment, thereby improving the reliability of circuit operation and enhancing the fault tolerance performance of the entire circuit architecture.

[0108] When the battery control circuit 9 includes a first positive terminal connector 91, a first positive terminal subconnector 921, a second positive terminal subconnector 922, a first negative terminal connector 93, and a second negative terminal connector 94, in some embodiments, as shown in Figure 10, a first branch switch 16 and a current sensor 15 are connected to the first positive terminal branch 101, and a second branch switch 17 and a current sensor 15 are connected to the second positive terminal branch 102. A main negative terminal switch 14 and a pre-charge circuit 13 connected in parallel to the main negative terminal switch 14 are installed on the negative terminal line 11.

[0109] By installing the precharge circuit on the negative electrode line 11, more space is left for the positive electrode line 10, which helps to install other components or wire in the remaining space. By installing the first branch switch 16 and the second branch switch 17, the connections between the first drive assembly 2 and the second drive assembly 3 and the positive electrode of the battery 100 are made independent of each other, so that even if one drive assembly fails, it does not affect the operation of the other drive assembly, thereby improving the fault tolerance performance of the entire circuit structure.

[0110] In some other embodiments of this application, in the schematic diagram of the connection structure between the charge / discharge circuit 400 and the battery control circuit 9 shown in Figure 11, a first branch switch 16 is connected to the first positive branch 101, a precharge circuit 13 is connected to the second positive branch 102, the precharge circuit 13 is connected in parallel to the first branch switch 16, and a second branch switch 17 is further connected between the precharge circuit 13 and the second positive subconnector 922 at the second positive branch 102. A main negative switch 14 and a current sensor 15 are installed on the negative line 11. Here, the circuit structure on the first positive branch 101 can be swapped with the circuit structure on the second positive branch 102.

[0111] By installing the pre-charge circuit 13 at the second positive terminal branch 102, more space is left for the negative terminal line 11, which helps to install other components or wire in the remaining space. The circuit between the battery 100 and the first drive assembly 2 can be made to conduct or to disconnect by controlling the first branch switch 16, and the circuit between the battery 100 and the second drive assembly 3 can be made to conduct or to disconnect by controlling the second branch switch 17. If a failure occurs in the first drive assembly 2, the first branch switch 16 can be controlled to turn off, thereby achieving the effect of protecting the battery 100. If a failure occurs in the second drive assembly 3, the second branch switch 17 can be controlled to turn off, also achieving the effect of protecting the battery 100. Furthermore, the connections between the first drive assembly 2 and the second drive assembly 3 and the positive terminal are independent of each other, so even if a failure occurs in one drive assembly, it does not affect the operation of the other drive assembly, improving the fault tolerance performance of the entire circuit structure.

[0112] In some embodiments of this application, in the schematic diagram of the connection between the charge / discharge circuit 400 and the battery control circuit 9 shown in Figure 12, the second negative electrode connector 94 includes a first negative electrode subconnector 941 and a second negative electrode subconnector 942, and the negative electrode line 11 includes a first negative electrode branch 111 and a second negative electrode branch 112. The first negative electrode branch 111 is connected between the first negative electrode subconnector 941 and the first negative electrode connector 93, and the second negative electrode branch 112 is connected between the second negative electrode subconnector 942 and the first negative electrode connector 93. The first negative electrode subconnector 941 is connected to the second end of the first drive assembly 2, and the second negative electrode subconnector 942 is connected to the second end of the second drive assembly 3.

[0113] In this embodiment, the negative electrode line 11 is divided into a first negative electrode branch 111 and a second negative electrode branch 112, which are connected to the second end of the first drive assembly 2 via the first negative electrode subconnector 941 and to the second end of the second drive assembly 3 via the second negative electrode subconnector 942, respectively. In this way, the second ends of the first drive assembly 2 and the second drive assembly 3 are connected to different connectors, eliminating the need to bundle the conductors at the second end of the first drive assembly 2 and the conductors at the second end of the second drive assembly 3 and connect them to the same connector, thereby improving the convenience of wiring.

[0114] When the above-mentioned battery control circuit 9 includes a first positive terminal connector 91, a second positive terminal connector 92, a first negative terminal connector 93, a first negative terminal subconnector 941, and a second negative terminal subconnector 942, in some embodiments, as shown in Figure 12, a third branch switch 18 is connected to the first negative terminal branch 111, a precharge circuit 13 is connected to the second negative terminal branch 112, the precharge circuit 13 is connected in parallel to the third branch switch 18, and a fourth branch switch 19 is further connected between the precharge circuit 13 on the second negative terminal branch 112 and the second negative terminal subconnector 942. A main positive terminal switch 12 and a current sensor 15 are installed on the positive terminal line 10. Here, the circuit structure on the first negative terminal branch 111 can also be swapped with the circuit structure on the second negative terminal branch 112.

[0115] By installing the pre-charge circuit 13 at the second negative terminal branch 112, more space is left for the positive terminal line 10, which helps to install other components or wire in the remaining space. The circuit between the battery 100 and the first drive assembly 2 can be made to conduct or to disconnect by controlling the third branch switch 18, and the circuit between the battery 100 and the second drive assembly 3 can be made to conduct or to disconnect by controlling the fourth branch switch 19. If a failure occurs in the first drive assembly 2, the third branch switch 18 can be controlled to turn off, thereby achieving the effect of protecting the battery 100. If a failure occurs in the second drive assembly 3, the fourth branch switch 19 can be controlled to turn off, also achieving the effect of protecting the battery 100. Furthermore, the connections between the first drive assembly 2 and the second drive assembly 3 and the negative terminal are independent of each other, so even if a failure occurs in one drive assembly, it does not affect the operation of the other drive assembly, improving the fault tolerance performance of the entire circuit structure.

[0116] In some other embodiments of this application, in the schematic diagram of the connection between the charge / discharge circuit 400 and the battery control circuit 9 shown in Figure 13, the first negative electrode branch 111 is connected to the third branch switch 18 and the current sensor 15, and the second negative electrode branch 112 is connected to the fourth branch switch 19 and the current sensor 15. The positive electrode line 10 is provided with the main positive electrode switch 12 and the precharge circuit 13 connected in parallel to the main positive electrode switch 12.

[0117] This installation leaves more space for the negative electrode line 11, allowing for the installation of other components and wiring in the remaining space. By installing the third branch switch 18 and the fourth branch switch 19, the connections between the first drive assembly 2 and the second drive assembly 3 and the positive electrode are made independent of each other, so that even if one drive assembly fails, it does not affect the operation of the other drive assembly, thereby improving the fault tolerance performance of the entire circuit structure.

[0118] In some embodiments of this application, in the schematic diagram of the connection structure between the charge / discharge circuit 400 and the battery control circuit 9 shown in Figure 14, the second positive electrode connector 92 includes a first positive electrode subconnector 921 and a second positive electrode subconnector 922, the second negative electrode connector 94 includes a first negative electrode subconnector 941 and a second negative electrode subconnector 942, a first positive electrode branch 101 is connected between the first positive electrode subconnector 921 and the first positive electrode connector 91, and a second positive electrode branch 102 is connected between the second positive electrode subconnector 922 and the first positive electrode connector 91. A first negative electrode branch 111 is connected between the first negative electrode subconnector 941 and the first negative electrode connector 93, and a second negative electrode branch 112 is connected between the second negative electrode subconnector 942 and the first negative electrode connector 93. The first positive subconnector 921 is connected to the first end of the first drive assembly 2, and the second positive subconnector 922 is connected to the first end of the second drive assembly 3. The first negative subconnector 941 is connected to the second end of the first drive assembly 2, and the second negative subconnector 942 is connected to the second end of the second drive assembly 3.

[0119] In this embodiment, the battery control circuit 9 has a total of six connectors: a first positive connector 91, a first positive subconnector 921, a second positive subconnector 922, a first negative connector 93, a first negative subconnector 941, and a second negative subconnector 942. The first drive assembly 2 is connected to the battery control circuit 9 via the first positive subconnector 921 and the first negative subconnector 941, and thereby connected to the battery 100. The second drive assembly 3 is connected to the battery control circuit 9 via the second positive subconnector 922 and the second negative subconnector 942, and thereby connected to the battery 100. In this connection structure, the first drive assembly 2 and the second drive assembly 3 are each connected to the battery 100 via mutually independent circuit branches. On the one hand, the layout and connections of the lines in the circuit become more orderly. On the other hand, even if a failure occurs in one branch, it does not affect the operation of the other branch, so power-consuming equipment can maintain its availability even if a failure occurs in one branch, thereby improving the fault tolerance performance of the circuit architecture.

[0120] In some embodiments, as shown in Figure 14, a first branch switch 16 is connected to the first positive branch 101, a precharge circuit 13 is connected to the second positive branch 102, the precharge circuit 13 is connected in parallel to the first branch switch 16, and a second branch switch 17 is further connected between the precharge circuit 13 and the second positive subconnector 922 at the second positive branch 102. A third branch switch 18 and a current sensor 15 are connected to the first negative branch 111, and a fourth branch switch 19 and a current sensor 15 are connected to the second negative branch 112.

[0121] In this embodiment, by installing the pre-charge circuit 13 at the second positive terminal branch 102, more space is left for the negative terminal line 11, which helps to install other components or wire in the remaining space. The circuit between the battery 100 and the first drive assembly 2 can be made to conduct or to disconnect by controlling the first branch switch 16 or the third branch switch 18, and the circuit between the battery 100 and the second drive assembly 3 can be made to conduct or to disconnect by controlling the second branch switch 17 or the fourth branch switch 19. If a failure occurs in the first drive assembly 2, the first branch switch 16 and / or the third branch switch 18 can be controlled to turn off, thereby achieving the effect of protecting the battery 100. If a failure occurs in the second drive assembly 3, the second branch switch 17 and / or the fourth branch switch 19 can be controlled to turn off, also achieving the effect of protecting the battery 100. The magnitude of the current in the circuit branch where the first drive assembly 2 is located can be detected by the current sensor 15 on the first negative pole branch 111, and the detected magnitude of the current contributes to determining whether or not a fault has occurred in the circuit branch where the first drive assembly 2 is located. The magnitude of the current in the circuit branch where the second drive assembly 3 is located can be detected by the current sensor 15 on the second negative pole branch 112, and the detected magnitude of the current contributes to determining whether or not a fault has occurred in the circuit branch where the second drive assembly 3 is located.

[0122] In some other embodiments, in a schematic diagram of the structure in which the charge / discharge circuit 400 shown in Figure 15 is connected to the battery control circuit 9, the first positive electrode branch 101 is connected to the first branch switch 16 and the current sensor 15, and the second positive electrode branch 102 is connected to the second branch switch 17 and the current sensor 15. The first negative electrode branch 111 is connected to the third branch switch 18, and the second negative electrode branch 112 is connected to the precharge circuit 13, which is connected in parallel to the third branch switch 18. A fourth branch switch 19 is further connected between the precharge circuit 13 on the second negative electrode branch 112 and the second negative electrode subconnector 942.

[0123] In this embodiment, by providing the pre-charge circuit 13 at the second negative electrode branch 112, more space is left for the positive electrode line 10, which helps to install other components or wire in the remaining space. This circuit structure allows for easy control of the connection between the first drive assembly 2, the second drive assembly 3 and the battery 100. If a failure occurs in the first drive assembly 2 and / or the second drive assembly 3, the connection between the battery 100 and the failed component can be interrupted by controlling the switch, thereby protecting the battery 100.

[0124] In some embodiments of this application, the battery control circuit 9 may be installed in the form of a battery main control box, the connectors mentioned in each of the above embodiments may be installed on the outside of the battery main control box, and lines such as the positive electrode line 10 and the negative electrode line 11 may be installed inside the battery main control box, thereby allowing the circuit lines to be installed more neatly.

[0125] In the embodiments of this application, the placement of the precharge circuit in the battery control circuit and the method of installing the connectors on the battery control circuit result in a more orderly arrangement of components and wiring of the entire circuit structure when the battery control circuit is connected to the charge / discharge circuit. Furthermore, the first and second drive assemblies may be independently connected to different branches, and if a failure occurs in the branch where one drive assembly is located or in one drive assembly, kinetic energy can be supplied to the power-consuming device by the normal operation of the other branch or the other drive assembly, thereby improving the reliability of the circuit operation and enhancing the fault tolerance performance of the entire circuit architecture. Because the battery control circuit can flexibly adjust the connection relationships between the positive and negative electrodes of the battery and other components in the circuit, a wider variety of circuit functions can be realized by adjusting the circuit structure.

[0126] The above descriptions of each embodiment tend to highlight the differences between them, and their similarities or similarities may be referenced to one another. For the sake of brevity, detailed descriptions are omitted in this specification.

[0127] The following describes the charge / discharge circuit 400 according to an embodiment of this application with a specific example. In the schematic diagram of the connection between the charge / discharge circuit 400 and the battery control circuit 9 shown in Figure 16, the charge / discharge circuit 400 includes one battery, the positive terminal of which is connected to the first positive terminal connector 91 of the battery control circuit 9, and the negative terminal of which is connected to the first negative terminal connector 93 of the battery control circuit 9. The battery control circuit 9 is further equipped with a first positive terminal subconnector 921 and a second positive terminal subconnector 922. A first positive terminal branch 101 between the first positive terminal connector 91 and the first positive terminal subconnector 921 is connected to a first branch switch 16. A precharge circuit 13 and a second branch switch 17 are connected to a second positive terminal branch 102 between the first positive terminal connector 91 and the second positive terminal subconnector 922. Here, the precharge circuit 13 is connected in parallel to the first branch switch 16. The pre-charge circuit 13 includes a switch K3 and a resistor R connected in series.

[0128] The battery control circuit 9 is further equipped with a first negative electrode subconnector 941 and a second negative electrode subconnector 942. A third branch switch 18 and a current sensor 15 are connected to the first negative electrode branch 111 between the first negative electrode connector 93 and the first negative electrode subconnector 941. A fourth branch switch 19 and a current sensor 15 are connected to the second negative electrode branch 112 between the first negative electrode connector 93 and the second negative electrode subconnector 942.

[0129] The first positive subconnector 921 is connected to the common connection point of the upper bridge arm of each bridge arm in the first motor controller 22, and the first negative subconnector 941 is connected to the common connection point of the lower bridge arm of each bridge arm in the first motor controller 22. Each bridge arm in the first motor controller 22 is further connected in parallel to capacitor C1. In Figure 16, the first motor controller 22 includes three bridge arms, and the corresponding first motor 21 has three windings. The connection points of the upper and lower bridge arms of the three bridge arms are each connected one-to-one to the three windings.

[0130] The second positive subconnector 922 is connected to the common connection point of the upper bridge arm of each bridge arm in the second motor controller 32, and the second negative subconnector 942 is connected to the common connection point of the lower bridge arm of each bridge arm in the first motor controller 32. Each bridge arm in the second motor controller 32 is further connected in parallel to capacitor C2. In Figure 16, the second motor controller 32 includes three bridge arms, and the corresponding second motor 31 has three windings. The connection points of the upper and lower bridge arms of the three bridge arms are each connected one-to-one to the three windings.

[0131] The first neutral wire terminal 5 is connected to the neutral point of the first motor 21, and the second neutral wire terminal 6 is connected to the neutral point of the second motor 31. Inductors L1, L2, L3 and the first switch 4 are connected in series between the first neutral wire terminal 5 and the second neutral wire terminal 6. Switches K1, K2, and K3 are connected in parallel to inductors L1, L2, and L3, respectively.

[0132] Taking the example that the power-consuming device to which this charge / discharge circuit 400 belongs is an electric vehicle, in the circuit configuration shown in Figure 16, when the first switch 4 is turned off, the first motor 21 and the second motor 31 are connected in parallel, and the electric vehicle can be driven and moved through the configured circuit loop. In this case, the electric vehicle can enter a driving mode and operate under normal driving conditions.

[0133] When the first switch 4 is closed, the first motor 21 and the second motor 31 are connected in series by controlling the on / off state of the bridge arms in the first motor controller 22 and the second motor controller 32, forming a charge / discharge circuit with the battery 100 and achieving heating of the battery 100.

[0134] As shown in Figure 16, when the first switch 4 is closed, the IGBT switch transistors V1, V2, V3 in the first motor controller 22 and switch transistors V10, V11, V12 in the second motor controller 32 are controlled to turn ON, and V4, V5, V6 in the first motor controller 22 and V7, V8, V9 in the second motor controller 32 are controlled to turn OFF. As a result, the current first passes through the first motor 21, then flows through the line where the first switch 4 is located, and finally passes through the second motor 31 to flow to the negative terminal of the battery 100, forming a battery discharge circuit. After the battery has been discharged for a certain period, the current is controlled to turn on V4, V5, V6 and V7, V8, V9, and turn off V1, V2, V3 and V10, V11, V12. This causes the current to first pass through the first motor 21, then through the circuit where the first switch 4 is located, and finally through the second motor 31 to flow to the positive terminal of the battery 100, forming a battery charging circuit. By controlling the battery to alternately form a discharge circuit and a charging circuit, a pulse heating function can be realized. Specifically, the IGBT switch transistor of the first motor 21 is used as the main control switch, and the three-phase winding is used as a three-phase inductor. The IGBT switch transistor of the second motor 31 functions as an auxiliary control switch, and the winding functions as a series inductor, thereby achieving pulse heating of the battery 100.

[0135] In another method, when the first switch 4 is closed, the switch transistors V7, V8, V9 and V4, V5, V6 are controlled to turn on, and V1, V2, V3 and V10, V11, V12 are controlled to turn off. This causes the current to first pass through the second motor 31, then through the circuit where the first switch 4 is located, and finally through the first motor 21 to flow to the negative terminal of the battery, forming a battery discharge circuit. After the battery has been discharged for a certain period, the current can be controlled to first pass through the second motor 31, then through the line where the first switch 4 is located, and finally through the first motor 21 to flow to the positive terminal of the battery, forming a battery charging circuit. In this way, pulse heating of the battery 100 can also be achieved.

[0136] When the first switch 4 is closed, the IGBT switch transistor of the first motor 21 is used as the main control switch, and the IGBT switch transistor of the second motor 31 is used as an auxiliary control switch. By controlling the upper or lower bridge arms of any number of bridge arms in the auxiliary control switch to be turned on, a battery charging circuit or discharge circuit can be formed in combination with the IGBT switch transistor of the first motor 21. Multiple different charging and discharging circuits can be formed by controlling the on / off state of each bridge arm in the motor controller of the two motors.

[0137] By considering the spatial layout and other factors, the pre-charge circuit 13 installed on the positive electrode line in Figure 16 can be adjusted to the negative electrode line to realize a new system architecture.

[0138] The structure of the charge / discharge circuit 400 shown in Figure 16 is merely one example; in actual applications, the structure of the charge / discharge circuit 400 may be any structure according to the above-described embodiment, or a circuit structure combining any of the above-described embodiments.

[0139] In the circuit structure shown in Figure 16, the neutral wires of the first motor 21 and the second motor 31 are drawn out, and the first switch 4 is connected between their neutral points. The connection relationship between the first motor 21 and the second motor 31 can be switched by the first switch 4, thereby enabling the formation of different circuit loops and allowing for flexible modification of the circuit structure, thereby supporting the realization of more different functions. Multiple inductors may also be connected in series between the neutral points of the two motors, or switches may be connected in parallel to the inductors, thereby flexibly adjusting the inductance connected to the charge / discharge circuit and meeting different battery heating needs by adjusting the circuit structure. Furthermore, the placement of the precharge circuit 13 in the battery control circuit 9 and the method of installing the connectors on the battery control circuit 9 result in a more orderly arrangement of components and wiring in the overall circuit structure, improving the fault tolerance performance of the overall circuit structure and enhancing the safety of the circuit.

[0140] The above descriptions of each embodiment tend to highlight the differences between them, and their similarities or similarities may be referenced to one another. For the sake of brevity, detailed descriptions are omitted in this specification.

[0141] Some embodiments of this application further provide a power-consuming device, as shown in Figure 17, which includes a control device 20, a charge / discharge circuit 400 according to any of the above embodiments, and a battery control circuit 9 according to any of the embodiments, the battery control circuit 9 being connected to the charge / discharge circuit 400. The control device 20 is communicated to a switch element in the charge / discharge circuit 400 and the battery control circuit 9, the switch element including at least a first switch 4 connected between the neutral point of a first motor 21 and the neutral point of a second motor 31.

[0142] The above-mentioned switch elements may further include switches installed in the battery control circuit 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, vehicle controller, or domain controller, etc. This power-consuming device may be any device equipped with a single battery and dual motors, such as an electric vehicle, electric ship, or electric airplane.

[0143] The automatic control of the switching elements in the charge / discharge circuit 400 by this control device 20 enables flexible switching between different circuit loops by turning the switching elements on or off, thereby enabling more functions, improving the control flexibility and fault tolerance of the charge / discharge circuit, increasing the functions that can be realized in the overall circuit architecture, and improving the performance of power-consuming devices.

[0144] The above descriptions of each embodiment tend to highlight the differences between them, and their similarities or similarities may be referenced to one another. For the sake of brevity, detailed descriptions are omitted in this specification.

[0145] The following points need to be explained.

[0146] The term "module" is not intended to be limited to a specific physical form. Depending on the specific application, a module may be implemented as hardware, firmware, software, and / or a combination thereof. Different modules may share common components or may be implemented by the same components. Clear boundaries may or may not exist between different modules.

[0147] The algorithms and representations provided herein are not inherently related to any particular computer, virtual machine, or other device. Various general-purpose devices may be used together based on the examples provided herein. The structures necessary to construct such devices are evident from the above description. Furthermore, this application does not target any particular programming language. It should be understood that the contents of this application described herein can be implemented in various programming languages, and the above description for a particular language is intended to disclose the best embodiment of this application.

[0148] It should be understood that while the steps in the flowcharts of the attached diagrams are shown sequentially as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise specified herein, the order in which these steps are performed is not strictly restricted, and they may be performed in other orders. Furthermore, at least some of the steps in the flowcharts of the attached diagrams may include multiple substeps or stages, and these substeps or stages are not necessarily performed at the same time, but may be performed at different time points, and their order of execution is not necessarily sequential, and may be performed sequentially or alternately with at least some of the other steps or substeps or stages of other steps.

[0149] The above-described embodiments merely illustrate embodiments of the present application, and although their description is relatively detailed and specific, they should not be understood as limiting the scope of the claims of this application. A person skilled in the art should point out that several modifications and improvements can be made without departing from the concept of this application, and that all of these fall within the scope of protection of this application. Therefore, the scope of protection of this application should be based on the attached claims.

Claims

1. A charge / discharge circuit comprising a power supply module, a first drive assembly, a second drive assembly, and a first switch, wherein the power supply module includes a battery, the first drive assembly includes a first motor, and the second drive assembly includes a second motor. 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 first switch has one end connected to the neutral point of the first motor and the other end connected to the neutral point of the second motor. A first neutral wire terminal is installed at the neutral point of the first motor, and a second neutral wire terminal is installed at the neutral point of the second motor. The charge / discharge circuit is characterized in that the first switch has one end connected to the first neutral wire terminal via a high-voltage wire harness and the other end connected to the second neutral wire terminal via a high-voltage wire harness.

2. The charge / discharge circuit further includes an energy storage element, The charge / discharge circuit according to claim 1, characterized in that the energy storage element is connected to a line between the neutral point of the first motor and the neutral point of the second motor, and the energy storage element is connected in series with the first switch.

3. The energy storage element includes one or more inductors, The charge / discharge circuit according to claim 2, characterized in that the one or more inductors and the first switch are connected in series to a line between the neutral point of the first motor and the neutral point of the second motor.

4. The charge-discharge circuit according to claim 3, further comprising one or more second switches, the second switches being connected in parallel to the one or more inductors.

5. The charge / discharge circuit according to claim 4, characterized in that the second switch corresponds one-to-one with the inductor, and each second switch is connected in parallel to the inductor corresponding to it.

6. A battery control circuit, comprising a first positive terminal connector, a second positive terminal connector, a first negative terminal connector, and a second negative terminal connector, A positive electrode line is connected between the first positive electrode connector and the second positive electrode connector, and a negative electrode line is connected between the first negative electrode connector and the second negative electrode connector. The first positive connector is used to connect to the positive terminal of the battery in the charge / discharge circuit according to any one of claims 1 to 5, and the first negative connector is used to connect to the negative terminal of the battery. The second positive connector is used to connect to the first end of the first drive assembly and the first end of the second drive assembly in the charge / discharge circuit, respectively. A battery control circuit characterized in that the second negative terminal connector is used to connect to the second end of the first drive assembly and the second end of the second drive assembly, respectively.

7. The positive electrode line is equipped with a main positive electrode switch and a pre-charge circuit connected in parallel to the main positive electrode switch. The battery control circuit according to claim 6, characterized in that a main negative electrode switch and a current sensor are installed in the negative electrode line.

8. The positive electrode line is equipped with a main positive electrode switch and a current sensor. The battery control circuit according to claim 6, characterized in that a main negative electrode switch and a pre-charge circuit connected in parallel to the main negative electrode switch are installed in the negative electrode line.

9. The aforementioned second positive connector includes a first positive subconnector and a second positive subconnector, and the positive line includes a first positive branch and a second positive branch. The first positive subconnector and the first positive connector are connected to the first positive branch, and the second positive branch is connected to the second positive subconnector and the first positive connector. The battery control circuit according to claim 6, characterized in that the first positive subconnector is connected to the first end of the first drive assembly, and the second positive subconnector is connected to the first end of the second drive assembly.

10. A first branch switch is connected to the first positive branch, a precharge circuit is connected to the second positive branch, the precharge circuit is connected in parallel to the first branch switch, and a second branch switch is further connected between the precharge circuit and the second positive subconnector at the second positive branch. The battery control circuit according to claim 9, characterized in that a main negative electrode switch and a current sensor are installed in the negative electrode line.

11. The first positive terminal branch is connected to a first branch switch and a current sensor, and the second positive terminal branch is connected to a second branch switch and a current sensor. The battery control circuit according to claim 9, characterized in that a main negative electrode switch and a pre-charge circuit connected in parallel to the main negative electrode switch are installed in the negative electrode line.

12. The second negative electrode connector includes a first negative electrode subconnector and a second negative electrode subconnector, and the negative electrode line includes a first negative electrode branch and a second negative electrode branch. The first negative pole branch is connected between the first negative pole subconnector and the first negative pole connector, and the second negative pole branch is connected between the second negative pole subconnector and the first negative pole connector. The battery control circuit according to claim 6, characterized in that the first negative subconnector is connected to the second end of the first drive assembly, and the second negative subconnector is connected to the second end of the second drive assembly.

13. A third branch switch is connected to the first negative branch, a precharge circuit is connected to the second negative branch, and the precharge circuit is connected in parallel to the third branch switch. The battery control circuit according to claim 12, characterized in that a main positive electrode switch and a current sensor are installed in the positive electrode line.

14. The first negative terminal branch is connected to a third branch switch and a current sensor, and the second negative terminal branch is connected to a fourth branch switch and a current sensor. The battery control circuit according to claim 12, characterized in that a main positive electrode switch and a pre-charge circuit connected in parallel to the main positive electrode switch are installed in the positive electrode line.

15. The aforementioned second positive connector includes a first positive subconnector and a second positive subconnector, and the aforementioned second negative connector includes a first negative subconnector and a second negative subconnector. A first positive electrode branch is connected between the first positive electrode subconnector and the first positive electrode connector, and a second positive electrode branch is connected between the second positive electrode subconnector and the first positive electrode connector. A first negative pole branch is connected between the first negative pole subconnector and the first negative pole connector, and a second negative pole branch is connected between the second negative pole subconnector and the first negative pole connector. The first positive subconnector is connected to the first end of the first drive assembly, and the second positive subconnector is connected to the first end of the second drive assembly. The battery control circuit according to claim 6, characterized in that the first negative subconnector is connected to the second end of the first drive assembly, and the second negative subconnector is connected to the second end of the second drive assembly.

16. A first branch switch is connected to the first positive branch, a precharge circuit is connected to the second positive branch, and the precharge circuit is connected in parallel to the first branch switch. The battery control circuit according to claim 15, characterized in that a third branch switch and a current sensor are connected to the first negative electrode branch, and a fourth branch switch and a current sensor are connected to the second negative electrode branch.

17. The first positive terminal branch is connected to a first branch switch and a current sensor, and the second positive terminal branch is connected to a second branch switch and a current sensor. The battery control circuit according to claim 16, characterized in that a third branch switch is connected to the first negative branch, a precharge circuit is connected to the second negative branch, and the precharge circuit is connected in parallel to the third branch switch.

18. A power consumption device comprising a control device, a charge / discharge circuit according to any one of claims 1 to 5, and a battery control circuit, It includes a first positive connector, a second positive connector, a first negative connector, and a second negative connector. A positive electrode line is connected between the first positive electrode connector and the second positive electrode connector, and a negative electrode line is connected between the first negative electrode connector and the second negative electrode connector. The first positive connector is used to connect to the positive terminal of the battery in the charge / discharge circuit, and the first negative connector is used to connect to the negative terminal of the battery. The second positive connector is used to connect to the first end of the first drive assembly and the first end of the second drive assembly in the charge / discharge circuit, respectively. The battery control circuit is characterized in that the second negative terminal connector is used to connect to the second end of the first drive assembly and to the second end of the second drive assembly, respectively. The charging and discharging circuit is connected to the battery control circuit, The power consumption device is characterized in that the control device is communicated to the switch elements in the charge / discharge circuit and the battery control circuit, and the switch elements include at least a first switch in the charge / discharge circuit.

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