Charge / discharge circuits, methods, computing devices, and their storage media

Abstract

Embodiments of the present invention provide a charge / discharge circuit, method, computing device and storage medium thereof, wherein two energy storage elements in the charge / discharge circuit are connected via a first adjustment switch module, and heating control is performed after the switch is turned on, and self-heating of the battery is achieved by utilizing the alternating current generated by the charge / discharge loop between the dual drive motor and the battery. The present invention allows for flexible adjustment of the charge / discharge loop between the power battery and the energy storage elements without changing the original motor structure, thereby reducing costs and simultaneously improving the heating speed by flexibly adjusting the self-heating scheme of the battery due to the charge / discharge of the dual drive motor.

Description

Technical Field

[0001] Cross - reference to related applications This application claims priority to Chinese Patent Application No. 202310691523.4, titled "Charge - Discharge Circuit, Method, Computing Device, and Storage Medium Thereof", filed on June 12, 2023, and the entire content of the said application is incorporated herein by reference.

[0002] This application relates to the technical field of batteries, and particularly to charge - discharge circuits, methods, computing devices, and storage media thereof.

Background Art

[0003] Power modules such as rechargeable batteries have advantages such as high energy density, cycle charging ability, safety, and environmental friendliness. Therefore, power modules are widely applied in fields such as new energy vehicles, household appliances, and energy storage systems. With the development of battery technology and the needs of various vehicles and usage scenarios, the requirements for the self - heating performance of batteries are also becoming increasingly diverse.

[0004] Among them, regarding the self - heating solution of batteries in the usage scenario of dual - drive motors, the heating means is single, the cost is high, and in a dual - motor system, when heating the battery, how to control and realize the reduction of the battery heating cost and the increase of the heating speed of large - capacity batteries is an urgent problem to be solved.

[0005] The above description is only for providing information related to the background art of this application and does not necessarily constitute prior art.

Summary of the Invention

[0006] Embodiments of the present invention provide a charge / discharge circuit, method, computing device and storage medium thereof, which utilize the alternating current generated by the charge / discharge loop between a dual-drive motor and a battery to achieve self-heating of the battery. The present invention allows for flexible adjustment of the charge / discharge loop between the power battery and the energy storage element without altering the original motor structure, thereby reducing costs and simultaneously improving the heating rate by flexibly adjusting the self-heating scheme of the battery due to the charge / discharge of the dual-drive motor.

[0007] Specifically, by drawing out the neutral point of the motor, switching it on and connecting it, and then performing heating control, the number of heating changes in the dual motor is reduced, which not only lowers heating costs but also further improves the battery heating speed.

[0008] In a first aspect, the present invention provides a charge / discharge circuit comprising a power module, a first heating module, a second heating module, and a first regulating switch module, wherein both the first and second heating modules are connected to the power module, the first heating module includes a first energy storage element, the second heating module includes a second energy storage element, the power module includes a plurality of battery branches, and the first regulating switch module is connected between the first and second energy storage elements.

[0009] The charge / discharge circuit provided by the embodiment of the present invention connects two energy storage elements via a first adjustment switch module, and performs heating control after the switch is turned on. This allows for flexible adjustment of the charge / discharge loop between the power battery and the energy storage elements without changing the original motor structure, thereby reducing costs and simultaneously improving the heating speed by flexibly adjusting the self-heating scheme of the battery due to the charging and discharging of the dual drive motor.

[0010] The first and second heating modules can correspond to two sets of drive motors. The first adjustment switch module connects the first energy storage element in one set of motors to the second energy storage element in the other set of motors. In a dual-drive motor scenario, the charge-discharge loop between the power battery and the energy storage element is flexibly adjusted to enable self-heating of the dual motor battery. By adjusting the first and second switch modules in the two sets of motors, the charge-discharge of the power module is flexibly adjusted, and the self-heating method of the power battery is further flexibly adjusted to suit the heating needs of various scenarios.

[0011] In some embodiments, the first adjustment switch module is connected between the neutral point of the motor winding of the first energy storage element and the neutral point of the motor winding of the second energy storage element.

[0012] The charge / discharge circuit provided by the embodiment of the present invention reduces the heating changes of the dual motors and reduces heating costs by drawing the neutral point of the motor and then turning on the connection via the first adjustment switch module, thereby controlling the heating of the circuit. It also further improves the heating speed of the battery, reduces costs, and flexibly adjusts the charging and discharging of the dual drive motors to implement a self-heating solution for the battery in order to satisfy heating needs in various scenarios.

[0013] In some embodiments, the power module includes a first battery and a second battery connected to it, the first battery being connected to a first heating module and the second battery being connected to a second heating module.

[0014] The charge / discharge circuit provided by the embodiment of the present invention includes a power module with two battery branches, a first battery and a second battery, and in a dual-drive motor scenario, it flexibly adjusts the charge / discharge loop between the two batteries and the energy storage element to achieve self-heating of the batteries of the dual motors, and by adjusting the first switch module and the second switch module in the two sets of motors, it flexibly adjusts the charge / discharge of the power module and further flexibly adjusts the self-heating method of the power batteries to suit the heating needs of various scenarios.

[0015] In some embodiments, the power module includes a first battery and a second battery, and the charge / discharge circuit further includes a second adjustment switch module connected between the first battery and the second battery, the first battery being connected to a first heating module, and the second battery being connected to a second heating module.

[0016] The charge / discharge circuit provided by the embodiment of the present invention includes a power module with two battery branches, a first battery and a second battery, and is connected to the two batteries via a second adjustment switch module that performs change control to electrically adjust the connection method of the battery branches to suit different charge / discharge needs in the heating circuit, improve the system adaptability of the motor, and improve the heating rate of the batteries.

[0017] In some embodiments, the second adjustment switch module is connected between the positive terminal of the first battery and the positive terminal of the second battery.

[0018] The charge / discharge circuit provided by the embodiment of the present invention has a first battery and a second battery included in the power module connected on the positive side via a second adjustment switch module, forming a heating topology circuit for a common negative dual motor, and further controls the conduction and interruption of the circuit loop of the battery branch via the second adjustment switch module to adapt to different charge / discharge needs in the heating circuit, improve the system adaptability of the motor, and improve the heating speed of the battery.

[0019] In some embodiments, the second adjustment switch module is connected between the negative terminal of the first battery and the negative terminal of the second battery.

[0020] The charge / discharge circuit provided by the embodiment of the present invention has a first battery and a second battery included in the power module connected on the negative side via a second adjustment switch module, forming a heating topology circuit for a common negative dual motor, and further controlling the conduction and interruption of the circuit loop of the battery branch via the second adjustment switch module to adapt to different charge / discharge needs in the heating circuit, improve the system adaptability of the motor, and improve the heating speed of the battery.

[0021] In some embodiments, the first heating module includes a first switch module, the second heating module includes a second switch module, the positive terminal side of the first battery is connected to the upper bridge arm of the first switch module, the positive terminal side of the second battery is connected to the upper bridge arm of the second switch module, and the negative terminal side of the first battery is connected to the negative terminal side of the second battery, the lower bridge arm of the first switch module, and the lower bridge arm of the second switch module.

[0022] The charge / discharge circuit provided by the embodiment of the present invention connects two energy storage elements via a first adjustment switch module, and performs heating control after the switch is turned on. This allows for flexible adjustment of the charge / discharge loop between the power battery and the energy storage elements without changing the original motor structure, thereby reducing costs and simultaneously improving the heating speed by flexibly adjusting the self-heating scheme of the battery due to the charging and discharging of the dual drive motor.

[0023] In some embodiments, the first heating module includes a first switch module, the second heating module includes a second switch module, the positive terminal side of the first battery is connected to the upper bridge arm of the first switch module, the positive terminal side of the second battery is connected to the upper bridge arm of the second switch module, and the negative terminal side of the first battery is connected to the negative terminal side of the second battery, the lower bridge arm of the first switch module, and the lower bridge arm of the second switch module.

[0024] The charge / discharge circuit provided by the embodiment of the present invention connects two energy storage elements via a first adjustment switch module, and performs heating control after the switch is turned on. This allows for flexible adjustment of the charge / discharge loop between the power battery and the energy storage elements without changing the original motor structure, thereby reducing costs and simultaneously improving the heating speed by flexibly adjusting the self-heating scheme of the battery due to the charging and discharging of the dual drive motor.

[0025] In a second aspect, the present invention provides an electrical device comprising a control module connected to a first regulating switch module, a first switch module included in a first heating module, and a second switch module included in a second heating module, for regulating the charging and discharging between the batteries of a power module, and any one of the above-mentioned charging and discharging circuits.

[0026] The electrical equipment provided by the embodiment of the present invention has a control module and a first adjustment switch module of the charge / discharge circuit, which connects a first energy storage element in one set of motors to a second energy storage element in the other set of motors, enabling self-heating of the batteries of the dual motors in a dual-drive motor scenario. By adjusting the switch modules in the two sets of motors, the charging and discharging of the power modules can be flexibly adjusted, and the self-heating method of the power batteries can be flexibly adjusted to suit the heating needs of various scenarios, thereby reducing costs and satisfying heating needs in various scenarios while flexibly adjusting the self-heating method of the batteries due to charging and discharging of the dual-drive motors.

[0027] In a third aspect, the present application provides a charging and discharging method applicable to the electrical device of the second aspect, including controlling to conduct the first adjustment switch module in response to a battery heating command, and adjusting the charging and discharging between the batteries of the power module.

[0028] The charging and discharging method provided by an embodiment of the present application controls to conduct the first adjustment switch module based on a battery heating command, and in the scenario of a dual-drive motor, without changing the circuit structure, flexibly adjusts the charging and discharging loop between the power battery and the energy storage element to realize the self-heating of the batteries of the dual motors, and adjusts the first switch module and the second switch module in the two sets of motors, thereby flexibly adjusting the charging and discharging of the power module, reducing costs, and at the same time, flexibly adjusting the self-heating solution of the batteries due to the charging and discharging of the dual-drive motor to improve the heating speed.

[0029] In some embodiments, the power module includes a first battery and a second battery, the charging and discharging circuit further includes a second adjustment switch module connected between the first battery and the second battery, and adjusting the charging and discharging between the batteries of the power module includes cutting off the second adjustment switch module and adjusting the charging and discharging between the first battery and the second battery.

[0030] The charging and discharging method provided by an embodiment of the present application cuts off the second adjustment switch module, then adjusts the charging and discharging loop between the power battery and the energy storage element to realize the self-heating of the batteries of the dual motors, reduces costs, and at the same time, flexibly adjusts the self-heating solution of the batteries due to the charging and discharging of the dual-drive motor to improve the heating speed.

[0031] In some embodiments, the power module includes a first battery and a second battery, and the charging and discharging between the batteries of the power module includes a first period of control to discharge from the first battery to the second battery, and a second period of control to discharge from the second battery to the first battery.

[0032] The charging and discharging method provided by the embodiment of the present invention further reduces costs by controlling the discharge from the first battery to the second battery in the first period and the discharge from the second battery to the first battery in the second period, while also flexibly adjusting the self-heating method of the batteries due to the charging and discharging of the dual drive motor to improve the heating rate.

[0033] In some embodiments, controlling the discharge from the first battery to the second battery includes a first period of control for discharge from the first battery to the first and second energy storage elements, and a second period of control for discharge from the first and second energy storage elements to the second battery.

[0034] The embodiments provided herein, as specifically disclosed, control the discharge from the first battery to the second battery by controlling the discharge from the first battery to the first and second energy storage elements in a first period, and by controlling the discharge from the first and second energy storage elements to the second battery in a second period, thereby achieving sustained self-heating in the self-heating process of the power module through different controls in different periods. This enables flexible adjustment of the self-heating scheme of the battery due to charging and discharging of the dual drive motor, thereby improving the heating rate.

[0035] In some embodiments, the first heating module includes a first switch module, the second heating module includes a second switch module, the first switch module includes a first group of bridge arms, the second switch module includes a second group of bridge arms, the positive terminal side of the first battery is connected to the upper bridge arm of the first switch module, the positive terminal side of the second battery is connected to the upper bridge arm of the second switch module, the negative terminal side of the first battery is connected to the negative terminal side of the second battery, the lower bridge arm of the first switch module, and the lower bridge arm of the second switch module, and controlling the discharge from the first battery to the second battery includes a first period of controlling the upper bridge arm of any phase in the first group of bridge arms and the lower bridge arm of any phase in the second group of bridge arms to conduct, and a second period of controlling the lower bridge arm of the second group of bridge arms to conduct while blocking the lower bridge arm to be connected and the upper bridge arm corresponding to the bridge arm to be blocked to conduct.

[0036] The charge-discharge method provided by the embodiment of the present application specifically controls, when adjusting the discharge from the first battery to the second battery, to conduct to an upper bridge arm of any phase in the first bridge arm group and a lower bridge arm of any phase in the second bridge arm group by controlling a first period, and in the second period, to disconnect the lower bridge arm of the second bridge arm group that is to conduct, and to conduct to the upper bridge arm corresponding to the disconnected bridge arm. During the self-heating process of the power module, sustained self-heating is achieved by different controls of different periods.

[0037] In some embodiments, the first heating module includes a first switch module, the second heating module includes a second switch module, the first switch module includes a first group of bridge arms, the second switch module includes a second group of bridge arms, the positive terminal side of the first battery is connected to the positive terminal side of the second battery, the upper bridge arm of the first switch module, and the upper bridge arm of the second switch module, the negative terminal side of the first battery is connected to the lower bridge arm of the first switch module, and the negative terminal side of the second battery is connected to the lower bridge arm of the second switch module, and controlling the discharge from the first battery to the second battery includes a first period of controlling the upper bridge arm of any phase in the second group of bridge arms and the lower bridge arm of any phase in the first group of bridge arms to be made conductive, and a second period of controlling the upper bridge arm of the second group of bridge arms to be made conductive while the lower bridge arm corresponding to the bridge arm to be made conductive.

[0038] The charge-discharge method provided by the embodiment of the present application specifically controls, when adjusting the discharge from the first battery to the second battery, to conduct to an upper bridge arm of any phase in the second bridge arm group and a lower bridge arm of any phase in the first bridge arm group by controlling a first period, and in the second period, to disconnect the upper bridge arm of the second bridge arm group that is conducting, and to conduct to the lower bridge arm corresponding to the disconnected bridge arm. During the self-heating process of the power module, sustained self-heating is achieved by different controls of different periods.

[0039] In some embodiments, controlling the discharge from the second battery to the first battery includes a first period of control for discharge from the second battery to the first energy storage element and the second energy storage element, and a second period of control for discharge from the first energy storage element and the second energy storage element to the first battery.

[0040] The embodiments provided herein, as specifically disclosed, control the discharge from the second battery to the first battery by controlling the discharge from the second battery to the first and second energy storage elements in a first period, and by controlling the discharge from the first and second energy storage elements to the first battery in a second period, thereby achieving sustained self-heating in the self-heating process of the power module through different controls in different periods. This enables flexible adjustment of the self-heating scheme of the battery due to charging and discharging of the dual drive motor to improve the heating rate.

[0041] In some embodiments, the first heating module includes a first switch module, the second heating module includes a second switch module, the first switch module includes a first group of bridge arms, the second switch module includes a second group of bridge arms, the positive side of the first battery is connected to the upper bridge arm of the first switch module, the positive side of the second battery is connected to the upper bridge arm of the second switch module, the negative side of the first battery is connected to the negative side of the second battery, the lower bridge arm of the first switch module, and the lower bridge arm of the second switch module, and controlling the discharge from the second battery to the first battery includes a first period of controlling the upper bridge arm of any phase in the second group of bridge arms and the lower bridge arm of any phase in the first group of bridge arms to conduct, and a second period of controlling the lower bridge arm of the first group of bridge arms to conduct while simultaneously controlling the upper bridge arm corresponding to the bridge arm to be disconnected.

[0042] The charge-discharge method provided by the embodiment of the present application specifically controls, when adjusting the discharge from the second battery to the first battery, to conduct an upper bridge arm of any phase in the second bridge arm group and a lower bridge arm of any phase in the first bridge arm group by controlling a first period, and in the second period, to disconnect the lower bridge arm of the first bridge arm group that is conducting, and to conduct the upper bridge arm corresponding to the disconnected bridge arm. During the self-heating process of the power module, sustained self-heating is achieved by different controls of different periods.

[0043] In some embodiments, the first heating module includes a first switch module, the second heating module includes a second switch module, the first switch module includes a first group of bridge arms, the second switch module includes a second group of bridge arms, the positive terminal side of the first battery is connected to the positive terminal side of the second battery, the upper bridge arm of the first switch module, and the upper bridge arm of the second switch module, the negative terminal side of the first battery is connected to the lower bridge arm of the first switch module, and the negative terminal side of the second battery is connected to the lower bridge arm of the second switch module, and controlling the discharge from the second battery to the first battery includes a first period of controlling the upper bridge arm of any phase in the first group of bridge arms and the lower bridge arm of any phase in the second group of bridge arms to conduct, and a second period of controlling the upper bridge arm of the first group of bridge arms to conduct while controlling the lower bridge arm corresponding to the bridge arm to be disconnected.

[0044] The charge-discharge method provided by the embodiment of the present application specifically controls, when adjusting the discharge from the second battery to the first battery, to conduct an upper bridge arm of any phase in the first bridge arm group and a lower bridge arm of any phase in the second bridge arm group by controlling a first period, and in the second period, to disconnect the upper bridge arm of the first bridge arm group that is conducting, and to conduct the lower bridge arm corresponding to the disconnected bridge arm. During the self-heating process of the power module, sustained self-heating is achieved by different controls of different periods.

[0045] In a fourth aspect, the present invention is a computing device comprising a memory for storing executable commands and a processor for connecting to the memory to complete any one of the charging / discharging methods of the third aspect by executing the executable commands.

[0046] The computing device provided by the embodiment of the present invention has two energy storage elements connected via a first adjustment switch module, which performs heating control after the switch is turned on, and can flexibly adjust the charge-discharge loop between the power battery and the energy storage elements without changing the original motor structure, thereby reducing costs and improving the heating speed by flexibly adjusting the self-heating scheme of the battery due to the charging and discharging of the dual drive motor.

[0047] In a fifth aspect, the present invention relates to a computer-readable storage medium in which a computer program is stored, the computer program being executed by a processor to implement any one of the charging and discharging methods of the third aspect.

[0048] The computer-readable storage medium provided by the embodiment of the present invention has two energy storage elements connected via a first adjustment switch module, which performs heating control after the switch is turned on, and can flexibly adjust the charge-discharge loop between the power battery and the energy storage elements without changing the original motor structure, thereby reducing costs and improving the heating speed by flexibly adjusting the self-heating scheme of the battery due to the charging and discharging of the dual drive motor.

[0049] To further clarify the technical concept in the embodiments of the present application, the drawings used in the embodiments of the present application are briefly introduced below. Clearly, the drawings in the following description represent only a few embodiments of the present application, and those skilled in the art can obtain further drawings without any creative effort. [Brief explanation of the drawing]

[0050] [Figure 1] This is a schematic diagram of a modularized charge / discharge circuit according to one or more embodiments. [Figure 2] This is a schematic circuit diagram of a charge / discharge circuit according to one or more embodiments. [Figure 3] This is a schematic circuit diagram of a charge / discharge circuit according to one or more embodiments. [Figure 4] This is a schematic circuit diagram of a charge / discharge circuit according to one or more embodiments. [Figure 5] This is schematic diagram 4 of a charge / discharge circuit according to one or more embodiments. [Figure 6] This is a schematic diagram of the structure of an electrical device according to one or more embodiments. [Figure 7] This is a schematic diagram of the steps of a charge / discharge method according to one or more embodiments. [Figure 8] This is a schematic diagram of the steps for adjusting the charging and discharging between batteries in a power module according to one or more embodiments. [Figure 9] This is a schematic diagram of a step for controlling the discharge from a first battery to a second battery according to one or more embodiments. [Figure 10]This is a schematic diagram of a step for controlling the discharge from a second battery to a first battery according to one or more embodiments. [Figure 11] This is a schematic circuit diagram showing the discharge from the first battery to the second battery in a charge-discharge method according to one or more embodiments. [Figure 12] This is a schematic circuit diagram (2) showing the discharge from the first battery to the second battery in a charge-discharge method according to one or more embodiments. [Figure 13] This is a schematic circuit diagram showing the discharge from the second battery to the first battery in a charge-discharge method according to one or more embodiments. [Figure 14] This is a schematic circuit diagram 2 showing the discharge from the second battery to the first battery in a charge-discharge method according to one or more embodiments. [Figure 15] This is a schematic circuit diagram showing the discharge from the first battery to the second battery in a charge-discharge method according to one or more embodiments. [Figure 16] This is a schematic circuit diagram (2) showing the discharge from the first battery to the second battery in a charge-discharge method according to one or more embodiments. [Figure 17] This is a schematic circuit diagram showing the discharge from the second battery to the first battery in a charge-discharge method according to one or more embodiments. [Figure 18] This is a schematic circuit diagram 2 showing the discharge from the second battery to the first battery in a charge-discharge method according to one or more embodiments. [Figure 19] This is a schematic diagram of the structure of a computing device according to one or more embodiments. [Modes for carrying out the invention]

[0051] In drawings, the drawings are not drawn to actual scale.

[0052] The embodiments of this application will be described in more detail below, in conjunction with the drawings and examples. The detailed description of the following embodiments and the drawings are used to illustrate the principles of this application, but are not intended to limit the scope of this application; that is, this application is not limited to the embodiments described.

[0053] In the description of this application, unless otherwise specified, "multiple" means two or more, and the directions or positional relationships indicated by terms such as "up," "down," "left," "right," "inside," and "outside" are solely for the purpose of facilitating and simplifying the description of this application, and do not indicate or imply that the devices or elements mentioned must have a specific direction, be composed of, or be operated in a specific direction, and therefore should not be understood as limiting this application. Furthermore, terms such as "first," "second," and "third" are used solely for explanatory purposes and should not be understood as indicating or implying relative importance. "Perpendicular" does not mean perpendicular in the strict sense, but within the margin of error. "Parallel" does not mean parallel in the strict sense, but within the margin of error.

[0054] The directional terms appearing in the following description all refer to the directions shown in the diagrams and do not limit the specific structure of the present application. In the description of the present application, and what should be explained, unless otherwise specifically defined or limited, the terms “attachment,” “connection,” and “connection” should be understood broadly to mean, for example, a physical connection, an electrical connection, an integral connection, or an indirect connection via an intermediate medium. A person skilled in the art may understand the specific meaning of the above terms in the present application depending on the specific circumstances.

[0055] With advancements in battery technology, various performance aspects of power modules, particularly battery self-heating, are constantly improving. However, in dual-drive motor applications, the current heating method is single, costly, and requires urgent resolution. How to control and achieve reduced battery heating costs and faster heating rates for high-capacity batteries in dual-motor systems is a critical issue that needs to be addressed.

[0056] Furthermore, regarding the self-heating mechanism of the battery in dual-drive motor applications, coordinated control of the dual-motor controller is crucial. It is important to reduce noise, vibration, and harshness (NVH) as well as rotor overheating issues during the battery heating process, and to improve the battery heating rate. These factors directly impact the customer's user experience.

[0057] In view of this, the embodiments of the present invention provide a charge / discharge circuit, method, computing device and storage medium thereof, which utilize the alternating current generated by the charge / discharge loop between the dual drive motor and the battery to achieve self-heating of the battery. The present invention allows for flexible adjustment of the charge / discharge loop between the power battery and the energy storage element without changing the original motor structure, thereby reducing costs and simultaneously improving the heating rate by flexibly adjusting the self-heating scheme of the battery due to the charge / discharge of the dual drive motor.

[0058] Specifically, by drawing out the neutral point of the motor, switching it on and connecting it, and then performing heating control, the number of heating changes in the dual motor is reduced, which not only lowers heating costs but also further improves the battery heating speed.

[0059] Specifically, the first and second heating modules in the embodiment of this application can correspond to two sets of drive motors. By controlling the conduction and interruption of the bridge arms of different phases of the motor's switch module, the charge-discharge loop between the power battery and the energy storage element can be flexibly adjusted without changing the original motor structure, thereby reducing costs and simultaneously improving the heating speed by flexibly adjusting the self-heating scheme of the battery due to the charging and discharging of the dual drive motor. The power module in the embodiment of this application may include, but is not limited to, lithium-ion batteries, lithium metal batteries, lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, lithium-sulfur batteries, lithium-air batteries, or sodium-ion batteries. In terms of scale, the battery in the embodiment of this application may be a single battery core, a battery module, or a battery pack. In terms of application scenarios, the battery may be applied to power systems of automobiles, ships, etc. For example, it can be applied to hybrid vehicles and supply power to the motor of a hybrid vehicle as a power source for an electric vehicle. The battery can further supply power to other electrical components in an electric vehicle, such as car air conditioners or in-car players.

[0060] For the sake of clarity, the following example will describe the application of the power module to a new energy vehicle (hybrid vehicle).

[0061] The drive motor and its control system are one of the core components of a new energy vehicle, and their drive characteristics determine the main performance indicators of the vehicle's operation. The motor drive system of a new energy vehicle mainly consists of parts such as an electric motor, a power converter, a motor controller (e.g., an inverter), various inspection sensors, and a power supply. A motor is a rotating electromagnetic machine that operates by applying the principle of electromagnetic induction to achieve the conversion of electrical energy into mechanical energy. When operating, it absorbs power from the electrical system and outputs mechanical power to the mechanical system.

[0062] Selectively, electrical equipment and computing devices include, but are not limited to, vehicles, ships, or aerospace vehicles.

[0063] Conventional battery heating control strategies have problems in the battery heating process, such as a relatively low heating rate during the pulse heating process, high rotor magnet temperature, and significant vibration and noise. These problems have become apparent in the market and degrade customer satisfaction. In contrast, this invention proposes a charge / discharge circuit, method, computing device, and its storage medium, which, by controlling the conduction and interruption of different phase bridge arms of the switch module, allows for flexible adjustment of the charge / discharge loop between the power battery and energy storage element without changing the original motor structure, thereby reducing costs and simultaneously improving the heating rate by flexibly adjusting the self-heating scheme of the battery due to charging and discharging of the dual drive motor.

[0064] In principle, the battery heating method of the embodiment of the present invention is based on a battery system in which multiple branch batteries can be connected in parallel and then powered. On the one hand, it is necessary to change the physical connection of the batteries so that the dual branch batteries are connected in reverse series during heating. Subsequently, by conducting and interrupting a switching element, the charge-discharge loop between the power battery and the energy storage element is flexibly adjusted to enable pulse current to flow between multiple battery packs.

[0065] The reverse series connection structure of the batteries is reconfigured by connecting the circuit so that the positive terminal of one set of batteries is connected to the positive terminal of the other set of batteries, or the negative terminal of one set of batteries is connected to the negative terminal of the other set of batteries.

[0066] In principle, the battery heating method of the embodiment of the present invention is based on a system in which multiple branch batteries independently power the motor, and does not require any change in the connection method between batteries. By drawing out the neutral point of the dual motor, the circuits constituting the two battery packs are connected, and during the heating process, the amplitude of the composite magnetic field generated by energizing the stator coil during the motor heating process is controlled to weaken using single-phase current or multi-phase common-mode current, thereby suppressing the NVH and rotor heat generation problems associated with conventional motor heating methods.

[0067] For the sake of explanation, in the battery heating solution of the embodiment of the present application, the dual-branch battery of the power battery system includes a first battery and a second battery.

[0068] The embodiments of the present invention will be described in general below.

[0069] The Battery Management System (BMS) collects temperature, state of charge (SOC), voltage, and current signals from the battery pack to determine whether the battery is functioning normally and whether the conditions for heating are met. The Motor Control Unit (MCU) collects the motor's voltage and current to determine whether the motor is stationary. The Vehicle Control Unit (VCU) determines whether to activate the pulse heating device that heats the battery based on the heating request transmitted from the BMS and the motor's operating status transmitted from the MCU.

[0070] After the BMS sends a heating request, the VCU determines that the battery's SOC state and the motor's operating state meet the heating conditions.

[0071] The specific topology structure of the dual motor circuit will employ different control methods. Specifically, it will include two dual motor circuit systems: one in which multiple branch batteries are connected in parallel to provide power, and another in which multiple branch batteries independently power the motors.

[0072] In the first scenario, where multiple branch batteries are connected in parallel to supply power, the battery pack first needs to switch from a parallel connection to an inverse series connection mode, thus changing the battery pack's connection method. In the second topology, where a battery pack supplies power to two motor systems individually, there is no need to change the battery connection method.

[0073] Finally, the MCU controls the conduction and disconnection between the first motor controller switch module and the second motor controller switch module, enabling mutual charging and discharging between the two sets of batteries and generating heat inside the batteries.

[0074] As soon as heating begins, the BMS determines whether there is any abnormality in the temperature of the battery group. If an abnormality is detected, it sends temperature abnormality information to the vehicle control unit, which then forwards the temperature abnormality information to the MCU, causing the motor controller to stop operating and the battery pack to switch back to its initial state.

[0075] Simultaneously with heating, the BMS determines whether the battery group temperature has reached the required level. If it has, the vehicle control unit transmits driving pulse heating stop information to the motor controller, stops heating, and switches the battery pack to the initial mode. If it has not reached the required level, the above heating process is repeated until the heating temperature reaches the required level.

[0076] The charge-discharge method of the embodiment of this application improves upon the problem of the low heating rate of conventional batteries and significantly increases the heating rate of the battery pack.

[0077] The charge / discharge circuits, methods, computing devices, and storage media of several embodiments of the present invention realize a battery self-heating technology at a relatively low cost, in which the rate of temperature rise of the battery can be adjusted, by reusing a second motor drive system.

[0078] In order to better understand the charging and discharging method in the dual-drive motor of this application, the charging and discharging circuit and its charging and discharging principle will be described as a whole below.

[0079] To further clarify the technical concepts and advantages of the embodiments of this application, exemplary embodiments of this application will be described in more detail below with reference to the drawings. However, it is clear that the embodiments described are only a selection of embodiments of this application and do not encompass all embodiments. Insofar as there is no contradiction, the embodiments and features of the embodiments of this application can be combined with each other.

[0080] For the sake of understanding and explanation, the first heating module and the second heating module in the embodiment of the present application can correspond to two sets of drive motors in terms of their functional principle, the first energy storage element and the second energy storage element can correspond to their respective motor windings, and the first switch module and the second switch module can correspond to their respective motor controllers.

[0081] Figure 1 is a schematic diagram of the modularized charge / discharge circuit provided according to an embodiment of the present application. Figure 2 is a schematic circuit diagram of the charge / discharge circuit 100 provided according to an embodiment of the present application.

[0082] As shown in Figure 1, the charge / discharge circuit 100 provided by the present invention includes a power module 10, a first heating module 20, a second heating module 30, and a first adjustment switch module, both of which are connected to the power module 10, the first heating module 20 including a first energy storage element 202, the second heating module 30 including a second energy storage element 302, the power module 10 including a plurality of battery branches, and the first adjustment switch module connected between the first energy storage element 202 and the second energy storage element 302.

[0083] Based on this, the charge / discharge circuit provided by the embodiment of the present invention has two energy storage elements connected via a first adjustment switch module, and after the switch is turned on, heating control is performed, allowing for flexible adjustment of the charge / discharge loop between the power battery and the energy storage elements without changing the original motor structure, thereby reducing costs and simultaneously improving the heating speed by flexibly adjusting the self-heating scheme of the battery due to the charging and discharging of the dual drive motor.

[0084] Of these, the first heating module 20 and the second heating module 30 can correspond to two sets of drive motors. The first adjustment switch module connects the first energy storage element 202 in one set of motors to the second energy storage element 302 in the other set of motors. In a dual-drive motor scenario, the charge-discharge loop between the power battery and the energy storage element is flexibly adjusted to enable self-heating of the dual motor battery. By adjusting the first switch module 201 and the second switch module 301 in the two sets of motors, the charge-discharge of the power module 10 is flexibly adjusted, and the self-heating method of the power battery is also flexibly adjusted to suit the heating needs of various scenarios.

[0085] In some embodiments, the first adjustment switch module is connected between the neutral point of the motor winding of the first energy storage element 202 and the neutral point of the motor winding of the second energy storage element 302.

[0086] The embodiment of this invention reduces the heating changes of the dual motors and lowers heating costs by drawing out the neutral point of the motor and then controlling the heating of the circuit after turning on the connection via the first adjustment switch module. At the same time, it improves the heating speed of the battery and lowers costs, while flexibly adjusting the charging and discharging of the dual drive motors to implement a self-heating solution for the battery in order to satisfy heating needs in various scenarios.

[0087] Figure 2 is a schematic circuit diagram 1 of a charge / discharge circuit according to one or more embodiments. Figure 3 is a schematic circuit diagram 2 of a charge / discharge circuit according to one or more embodiments.

[0088] Figures 2 and 3 represent charge / discharge circuits based on a power system in which multiple branch batteries independently supply power to a motor.

[0089] The power module 10 includes a first battery B1 and a second battery B2, to which the first battery B1 is connected to the first heating module 20 and the second battery B2 is connected to the second heating module 30.

[0090] The charge and discharge circuit provided by the embodiment of the present invention involves the first battery B1 and the second battery B2 independently supplying power to the motors to which they are connected during motor operation. The power module 10 includes two battery branches, the first battery B1 and the second battery B2, and in a dual-drive motor scenario, the charge and discharge loop between the two batteries and the energy storage element is flexibly adjusted to achieve self-heating of the batteries in the dual motors. By adjusting the first switch module 201 and the second switch module 301 in the two sets of motors, the charge and discharge of the power module 10 is flexibly adjusted, and the self-heating method of the power batteries is further flexibly adjusted to suit the heating needs of various scenarios.

[0091] Figure 4 is a schematic circuit diagram of a charge / discharge circuit according to one or more embodiments. Figure 5 is a schematic circuit diagram of a charge / discharge circuit according to one or more embodiments.

[0092] As shown in Figures 4 and 5, this belongs to a charge / discharge circuit based on a power system in which multiple branch batteries are connected in parallel to supply power.

[0093] The power module 10 includes a first battery B1 and a second battery B2, and the charge / discharge circuit further includes a second adjustment switch module connected between the first battery B1 and the second battery B2, the first battery B1 being connected to a first heating module 20 and the second battery B2 being connected to a second heating module 30.

[0094] The charge-discharge circuit provided by the embodiment of the present invention includes a power module 10 with two battery branches, a first battery B1 and a second battery B2, and is connected to the two batteries via a second adjustment switch module, which performs change control to electrically adjust the connection method of the battery branches to suit different charge-discharge needs in the heating circuit, improve the system adaptability of the motor, and improve the heating speed of the batteries.

[0095] As shown in Figure 4, in some embodiments, the second adjustment switch module is connected between the positive terminal of the first battery B1 and the positive terminal of the second battery B2.

[0096] The charge / discharge circuit provided by the embodiment of the present invention has a first battery B1 and a second battery B2 included in the power module 10 connected on the positive side via a second adjustment switch module, forming a heating topology circuit for a common negative dual motor, and in addition to this, the circuit loop of the battery branch is controlled to conduct and disconnect via the second adjustment switch module to adapt to different charge / discharge needs in the heating circuit, improve the system adaptability of the motor, and improve the heating speed of the batteries.

[0097] As shown in Figure 5, in some embodiments, the second adjustment switch module is connected between the negative terminal of the first battery B1 and the negative terminal of the second battery B2.

[0098] The charge / discharge circuit provided by the embodiment of the present invention has a first battery B1 and a second battery B2 included in the power module 10 connected on the negative side via a second adjustment switch module, forming a heating topology circuit for a common positive dual motor, and in addition to this, the circuit loop of the battery branch is controlled to conduct and disconnect via the second adjustment switch module to adapt to different charge / discharge needs in the heating circuit, improve the system adaptability of the motor, and improve the heating speed of the batteries.

[0099] In the configuration in which the power module 10 is connected to a dual motor, it can be implemented based on the heating topology structure of a dual motor with a common negative electrode battery, as shown in Figures 2 and 4. The positive side of the first battery B1 is connected to the upper bridge arm of the first switch module 201, the positive side of the second battery B2 is connected to the upper bridge arm of the second switch module 301, and the negative side of the first battery B1 is connected to the negative side of the second battery B2, the lower bridge arm of the first switch module 201, and the lower bridge arm of the second switch module 301.

[0100] The charge / discharge circuit provided by the embodiment of the present invention connects two energy storage elements via a first adjustment switch module, and performs heating control after the switch is turned on. This allows for flexible adjustment of the charge / discharge loop between the power battery and the energy storage elements without changing the original motor structure, thereby reducing costs and simultaneously improving the heating speed by flexibly adjusting the self-heating scheme of the battery due to the charging and discharging of the dual drive motor.

[0101] In the configuration in which the power module 10 is connected to a dual motor, it can be implemented based on the heating topology structure of a dual motor with a common positive electrode of the battery, as shown in Figures 3 and 5. The positive side of the first battery B1 is connected to the upper bridge arm of the first switch module 201, the positive side of the second battery B2 is connected to the upper bridge arm of the second switch module 301, and the negative side of the first battery B1 is connected to the negative side of the second battery B2, the lower bridge arm of the first switch module 201, and the lower bridge arm of the second switch module 301.

[0102] The charge / discharge circuit provided by the embodiment of the present invention connects two energy storage elements via a first adjustment switch module, and performs heating control after the switch is turned on. This allows for flexible adjustment of the charge / discharge loop between the power battery and the energy storage elements without changing the original motor structure, thereby reducing costs and simultaneously improving the heating speed by flexibly adjusting the self-heating scheme of the battery due to the charging and discharging of the dual drive motor.

[0103] The circuit further includes three bridge arm groups of the inverter and a motor neutral connection wire, and the motor includes a three-phase winding, which is an original component of an electric vehicle.

[0104] The descriptions of each of the above embodiments tend to emphasize the differences between them, and their similarities or identical features, which can be referenced to one another, are omitted in this specification for the sake of brevity.

[0105] Figure 6 is a schematic diagram of the structure of an electrical device according to one or more embodiments.

[0106] As shown in Figure 6, the present invention includes a control module 40 connected to a first adjustment switch module, a first switch module 201 included in a first heating module 20, and a second switch module 301 included in a second heating module 30, for adjusting the charging and discharging between the batteries of the power module 10, and a charge / discharge circuit 100 in any of the above embodiments.

[0107] The electrical equipment provided by the embodiment of the present invention has a control module and a first adjustment switch module of the charge / discharge circuit, which connects a first energy storage element 202 in one set of motors to a second energy storage element 302 in the other set of motors, enabling self-heating of the batteries of the dual motors in a dual-drive motor scenario. By adjusting the switch modules in the two sets of motors, the charging and discharging of the power module 10 can be flexibly adjusted, and the self-heating method of the power battery can be flexibly adjusted to suit the heating needs of various scenarios, thereby reducing costs and satisfying heating needs in various scenarios, while also flexibly adjusting the self-heating method of the batteries due to charging and discharging of the dual-drive motors.

[0108] Figure 7 is a schematic diagram of the steps of a charge-discharge method according to one or more embodiments.

[0109] As shown in Figure 7, the present invention provides a charging and discharging method applicable to an electrical device 200, which includes S1 and S2.

[0110] S1: In response to the battery heating command, control the first adjustment switch module to conduct electricity.

[0111] S2: Adjusts the charging and discharging between the batteries of power module 10.

[0112] The charge and discharge method provided by the embodiment of the present invention controls the first adjustment switch module to conduct based on a battery heating command, and in a dual-drive motor scenario, it is possible to flexibly adjust the charge and discharge loop between the power battery and the energy storage element without changing the circuit structure, thereby enabling self-heating of the battery of the dual motors. By adjusting the first switch module 201 and the second switch module 301 in the two sets of motors, the charge and discharge of the power module 10 can be flexibly adjusted, reducing costs, and at the same time, the self-heating method of the battery due to the charge and discharge of the dual-drive motors can be flexibly adjusted to improve the heating speed.

[0113] In some embodiments, the step of adjusting the charging and discharging between the batteries of the power module 10 in S2 includes shutting off the second adjustment switch module and adjusting the charging and discharging between the first battery B1 and the second battery B2.

[0114] The charge-discharge method provided by the embodiment of the present invention adjusts the charge-discharge loop between the power battery and the energy storage element after shutting off the second adjustment switch module, thereby enabling self-heating of the dual motor battery, reducing costs, and at the same time, flexibly adjusting the self-heating scheme of the battery due to charging and discharging of the dual drive motor to improve the heating rate.

[0115] Figure 8 is a schematic diagram of the steps for adjusting the charging and discharging between the batteries of the power module 10 according to one or more embodiments.

[0116] As shown in Figure 8, in some embodiments, the power module 10 includes a first battery B1 and a second battery B2, and the step of adjusting the charging and discharging between the batteries of the power module 10 in S2 includes S21 and S22.

[0117] S21: A first period during which the system is controlled to discharge from the first battery B1 to the second battery B2.

[0118] S22: A second period in which the second battery B2 is controlled to discharge to the first battery B1, wherein the control of the first period and the second period is continuously alternated during this second period.

[0119] The charging and discharging method provided by the embodiment of the present invention controls the discharge from the first battery B1 to the second battery B2 during the first period, and controls the discharge from the second battery B2 to the first battery B1 during the second period, thereby further reducing costs and simultaneously improving the heating speed by flexibly adjusting the self-heating method of the batteries due to the charging and discharging of the dual drive motor.

[0120] Figure 9 is a schematic diagram of the steps for controlling the discharge from the first battery B1 to the second battery B2 according to one or more embodiments.

[0121] As shown in Figure 9, in some embodiments, specifically, in S21, the control to discharge from the first battery B1 to the second battery B2 includes S211 and S212.

[0122] S211: A first period of control during which the first battery B1 is discharged to the first energy storage element 202 and the second energy storage element 302.

[0123] S212: A second period during which the first energy storage element 202 and the second energy storage element 302 are controlled to discharge into the second battery B2.

[0124] The embodiments provided herein, as specifically disclosed, control the discharge from the first battery B1 to the second battery B2 by controlling the discharge from the first battery B1 to the first energy storage element 202 and the second energy storage element 302 during the first period, and by controlling the discharge from the first energy storage element 202 and the second energy storage element 302 to the second battery B2 during the second period, thereby achieving sustained self-heating in the self-heating process of the power module 10 through different controls in different periods. This enables flexible adjustment of the self-heating scheme of the batteries due to charging and discharging of the dual drive motor to improve the heating rate.

[0125] As shown in Figures 2 and 4, this is applied to a topology circuit based on the heating topology structure of a battery common negative dual motor. The first switch module 201 includes a first group of bridge arms, and the second switch module 301 includes a second group of bridge arms. Controlling the discharge from the first battery B1 to the second battery B2 includes a first period of controlling the upper bridge arm of any phase in the first group of bridge arms and the lower bridge arm of any phase in the second group of bridge arms to conduct, and a second period of controlling the lower bridge arm of the second group of bridge arms to conduct while disconnecting the lower bridge arm to be connected and connecting the upper bridge arm corresponding to the disconnected bridge arm.

[0126] As shown in Figures 3 and 5, this is applied to a topology circuit based on the heating topology structure of a battery common positive dual motor. The first switch module 201 includes a first group of bridge arms, and the second switch module 301 includes a second group of bridge arms. Controlling the discharge from the first battery B1 to the second battery B2 includes a first period of control to conduct an upper bridge arm of any phase in the second group of bridge arms and a lower bridge arm of any phase in the first group of bridge arms, and a second period of control to disconnect the upper bridge arm of the second group of bridge arms and conduct the lower bridge arm corresponding to the disconnected bridge arm.

[0127] Figure 10 is a schematic diagram of the steps for controlling the discharge from the second battery B2 to the first battery B1 according to one or more embodiments.

[0128] As shown in Figure 10, in some embodiments, controlling the discharge from the second battery B2 to the first battery B1 in S22 includes S221 and S222.

[0129] S221: A first period of control to discharge from the second battery B2 to the first energy storage element 202 and the second energy storage element 302.

[0130] S222: A second period during which the first energy storage element 202 and the second energy storage element 302 are controlled to discharge into the first battery B1.

[0131] The embodiments provided herein, as specifically disclosed, when controlling the discharge from the second battery B2 to the first battery B1, control the discharge from the second battery B2 to the first energy storage element 202 and the second energy storage element 302 during the first period, and control the discharge from the first energy storage element 202 and the second energy storage element 302 to the first battery B1 during the second period, thereby achieving sustained self-heating in the self-heating process of the power module 10 through different control over different periods. This enables flexible adjustment of the self-heating scheme of the batteries due to charging and discharging of the dual drive motor, thereby improving the heating rate.

[0132] As shown in Figures 2 and 4, this is applied to a topology circuit based on a heating topology structure of a battery common negative dual motor. The first switch module 201 includes a first group of bridge arms, and the second switch module 301 includes a second group of bridge arms. Controlling the discharge from the second battery to the first battery includes a first period of control to make the upper bridge arm of any phase in the second group of bridge arms and the lower bridge arm of any phase in the first group of bridge arms conductive, and a second period of control to disconnect the lower bridge arm of the first group of bridge arms that is to be made conductive, while making the upper bridge arm corresponding to the disconnected bridge arm conductive.

[0133] As shown in Figures 3 and 5, this is applied to a topology circuit based on the heating topology structure of a battery common positive dual motor. The first switch module includes a first group of bridge arms, and the second switch module includes a second group of bridge arms. Controlling the discharge from the second battery to the first battery includes a first period of controlling the upper bridge arm of any phase in the first group of bridge arms and the lower bridge arm of any phase in the second group of bridge arms to conduct, and a second period of controlling the upper bridge arm of the first group of bridge arms to conduct while simultaneously controlling the lower bridge arm corresponding to the bridge arm to be disconnected.

[0134] Specifically, the charging and discharging principle of this embodiment will be further explained below, using the dual motor heating topology structure in Figure 2, in which multiple branch batteries are connected in parallel to supply power, as an example, in relation to the situation based on the common negative electrode of the batteries. For the principle of dual motor heating in which multiple branch batteries in Figure 4 independently supply power to the motor, please refer to Figure 2.

[0135] The Battery Management System (BMS) collects temperature, state of charge (SOC), voltage, and current signals from the battery pack to determine whether the battery is functioning normally and whether the conditions for heating are met. The Motor Control Unit (MCU) collects the motor's voltage and current to determine whether the motor is stationary. The Vehicle Control Unit (VCU) determines whether to activate the pulse heating device that heats the battery based on the heating request transmitted from the BMS and the motor's operating status transmitted from the MCU.

[0136] After the BMS sends a heating request, the VCU determines that the battery's SOC state and the motor's operating state meet the heating conditions.

[0137] The specific topology structure of the dual motor circuit will employ different control methods. Specifically, it will include two dual motor circuit systems: one in which multiple branch batteries are connected in parallel to provide power, and another in which multiple branch batteries independently power the motors.

[0138] In the first configuration shown in Figure 2, where multiple branch batteries are connected in parallel to supply power, the battery pack must first switch from a parallel connection to an inverse series connection mode, thus changing the battery pack's connection method. In the second configuration shown in Figure 4, where the battery pack supplies power to two motor systems individually, there is no need to change the battery connection method.

[0139] As shown in Figure 2, the motor controller or BMS controls k2 to shut off, switching the batteries from a parallel connection state to a reverse series connection state. At this time, the negative terminals of the two battery packs are connected and the positive terminals are shut off.

[0140] The pulse heating is divided into four stages. In the first and second stages, the charging from battery B1 to battery B2 is controlled. In the third and fourth stages, the charging from battery B2 to battery B1 is controlled.

[0141] Figure 11 is a schematic circuit diagram 1 showing the discharge from the first battery to the second battery in one or more embodiments of the charge-discharge method. Figure 12 is a schematic circuit diagram 2 showing the discharge from the first battery to the second battery in one or more embodiments of the charge-discharge method.

[0142] As shown in Figure 11, in the first stage, the upper bridge arm of the first motor controller and the lower bridge arm of the second motor controller are controlled to turn on, the battery B1 is in a discharge state, and the motor inductance performs energy storage and voltage boosting. At this time, the current flow in the battery is from the positive terminal of B1 → V1, V2, V3 → LA1, LB1, LC1 → LA2, LB2, LC2 → V10, V11, V12 → the negative terminal of B1.

[0143] As shown in Figure 12, in the second stage, the upper bridge arm of the first motor controller and the upper bridge arm of the second motor controller are controlled to be turned on, and the equivalent inductance of the motor releases the energy stored in the first stage to battery B2, so that battery B1 is in a discharged state and battery B2 is in a charged state. At this time, the current flow in the batteries is as follows: positive terminal of B1 → V1, V2, V3 → LA1, LB1, LC1 → LA2, LB2, LC2 → V7, ​​V8, V9 → negative terminal of B2 → positive terminal of B2 → negative terminal of B1. At the same time, in order to maintain the state in which battery B1 is discharged and battery B2 is charged, the charging time from battery B1 to battery B2 can be controlled by controlling the time it takes to switch the upper and lower bridge arms of the second motor controller back and forth.

[0144] Figure 13 is a schematic circuit diagram 1 showing the discharge from the second battery to the first battery in one or more embodiments of the charge-discharge method. Figure 14 is a schematic circuit diagram 2 showing the discharge from the second battery to the first battery in one or more embodiments of the charge-discharge method.

[0145] As shown in Figure 13, in the third stage, the lower bridge arm of the first motor controller and the upper bridge arm of the second motor controller are controlled to turn on, the battery B2 is in a discharged state, the motor inductance performs energy storage and voltage boosting, and at this time the current flow in the battery is from the positive terminal of B2 → V7, ​​V8, V9 → LA2, LB2, LC3 → LA1, LB1, LC1 → V4, V5, V6 → the negative terminal of B2.

[0146] As shown in Figure 14, in the fourth stage, the upper bridge arm V7 of the first motor controller and the upper bridge arm V7 of the second motor controller are controlled to be turned on, and the equivalent inductance of the motor releases the energy stored in the third stage to battery B1, so that battery B2 is in a discharged state and battery B1 is in a charged state. At this time, the current flow in the batteries is as follows: positive terminal of B2 → V7, ​​V8, V9 → LA2, LB2, LC3 → LA1, LB1, LC1 → V1, V2, V3 → positive terminal of B1 → negative terminal of B1 → negative terminal of B2. Similar to the second stage, the charging time from battery B2 to battery B1 can be controlled by controlling the time it takes to switch between the upper and lower bridge arms of the first motor controller.

[0147] By selectively controlling the three-phase currents of the motor to be in phase and with the same amplitude, the amount of linkage of the combined magnetic field generated by the motor windings when energized can be minimized on the rotor side, thereby reducing the problem of eddy current losses due to changes in the magnetic field at the rotor.

[0148] The dual motors may be permanent magnet motors and induction motors, and low-temperature pulse heating can be achieved. Furthermore, by supplying a three-phase current to the first motor, the second motor can perform the above-mentioned self-heating control as one of the three phases. The effect obtained accordingly is that the inductance of the second motor changes from the original parallel connection of three phase inductances to a single-phase inductance and participates in the heating process, slightly increasing the amount of inductance involved in energy conversion. As a result, the rate of change of the heating current becomes more gradual, and the peak value of the heating current on the motor side can be effectively improved within the same voltage platform and control time.

[0149] Finally, as heating begins, the BMS determines whether there are any temperature abnormalities in the battery group. If there are abnormalities, it sends temperature abnormality information to the vehicle control unit, which then forwards the temperature abnormality information to the MCU, causing the motor controller to stop operating and the battery pack to switch back to its initial state.

[0150] Simultaneously with heating, the BMS determines whether the battery group temperature has reached the required level. If it has, the vehicle control unit transmits driving pulse heating stop information to the motor controller, stops heating, and switches the battery pack to the initial mode. If it has not reached the required level, the above heating process is repeated until the heating temperature reaches the required level. The charge / discharge method of the embodiment of the present invention improves upon the problem of the low heating rate of conventional batteries and significantly improves the heating rate of the battery pack.

[0151] Next, specifically, the charging and discharging principle of the embodiment of this application will be further explained using the dual motor heating topology structure in which multiple branch batteries are connected in parallel to supply power as shown in Figure 3, as an example, in the case of a situation based on a common positive electrode of the batteries. For the principle of dual motor heating in which multiple branch batteries in Figure 5 independently supply power to the motor, please refer to Figure 3.

[0152] The Battery Management System (BMS) collects temperature, state of charge (SOC), voltage, and current signals from the battery pack to determine whether the battery is functioning normally and whether the conditions for heating are met. The Motor Control Unit (MCU) collects the motor's voltage and current to determine whether the motor is stationary. The Vehicle Control Unit (VCU) determines whether to activate the pulse heating device that heats the battery based on the heating request transmitted from the BMS and the motor's operating status transmitted from the MCU.

[0153] After the BMS sends a heating request, the VCU determines that the battery's SOC state and the motor's operating state meet the heating conditions. The specific topology structure of the dual motor circuit employs different control methods. Specifically, it includes two dual motor circuit systems: one where multiple branch batteries are connected in parallel for power supply, and another where multiple branch batteries independently power the motors.

[0154] In the first configuration shown in Figure 3, where multiple branch batteries are connected in parallel to supply power, the battery pack must first switch from a parallel connection to an inverse series connection mode, thus changing the battery pack's connection method. In the second configuration shown in Figure 5, where the battery pack supplies power to two motor systems individually, there is no need to change the battery connection method.

[0155] As shown in Figure 3, the motor controller or BMS controls k2 to shut off, switching the batteries from a parallel connection state to a reverse series connection state. At this time, the negative terminals of the two battery packs are connected and the positive terminals are shut off.

[0156] The pulse heating is divided into four stages. In the first and second stages, the charging from battery B1 to battery B2 is controlled. In the third and fourth stages, the charging from battery B2 to battery B1 is controlled.

[0157] Figure 15 is a schematic circuit diagram 1 showing the discharge from the first battery to the second battery in one or more embodiments of the charge-discharge method. Figure 16 is a schematic circuit diagram 2 showing the discharge from the first battery to the second battery in one or more embodiments of the charge-discharge method.

[0158] As shown in Figure 15, in the first stage, the upper bridge arm of any phase in the second bridge arm group and the lower bridge arm of any phase in the first bridge arm group are controlled to conduct, the battery B1 is in a discharge state, and the motor's inductance performs energy storage and voltage boosting. At this time, the current flow in the battery is from the positive terminal of B1 → V7, ​​V8, V9 → LA2, LB2, LC2 → LA1, LB1, LC1 → V4, V5, V6 → the negative terminal of B1.

[0159] As shown in Figure 16, in the second stage, the upper bridge arm of the second bridge arm group is controlled to be disconnected while the lower bridge arm corresponding to the disconnected bridge arm is controlled to be connected. The equivalent inductance of the motor releases the energy stored in the first stage to battery B2, so that battery B1 is in a discharged state and battery B2 is in a charged state. At this time, the current flow in the batteries is: positive terminal of B1 → positive terminal of B2 → negative terminal of B1 → V10, V11, V12 → LA2, LB2, LC2 → LA1, LB1, LC1 → V4, V5, V6 → negative terminal of B1. Simultaneously, in order to maintain the state in which battery B1 is discharged and battery B2 is charged, the charging time from battery B1 to battery B2 can be controlled by controlling the time it takes for the upper and lower bridge arms of the second motor controller to move back and forth and switch.

[0160] Figure 17 is a schematic circuit diagram 1 showing the discharge from the second battery to the first battery in one or more embodiments of the charge-discharge method. Figure 18 is a schematic circuit diagram 2 showing the discharge from the second battery to the first battery in one or more embodiments of the charge-discharge method.

[0161] As shown in Figure 17, in the third stage, the upper bridge arm of any phase in the first bridge arm group and the lower bridge arm of any phase in the second bridge arm group are controlled to conduct, the battery B2 is in a discharge state, the motor inductance performs energy storage and voltage boosting, and at this time the current flow in the battery is from the positive terminal of B2 → V1, V2, V3 → LA1, LB1, LC1 → LA2, LB2, LC3 → V10, V11, V12 → the negative terminal of B2.

[0162] As shown in Figure 18, in the fourth stage, the upper bridge arm of the first bridge arm group is controlled to be disconnected while the upper bridge arm corresponding to the disconnected bridge arm is controlled to be connected. The equivalent inductance of the motor releases the energy stored in the third stage to battery B1, battery B2 is in a discharged state, and battery B1 is in a charged state. At this time, the current flow in the batteries is: positive terminal of B2 → positive terminal of B1 → negative terminal of B1 → V4, V5, V6 → LA1, LB1, LC1 → LA2, LB2, LC3 → V10, V11, V12 → negative terminal of B2. Similar to the second stage, the charging time from battery B2 to battery B1 can be controlled by controlling the time it takes for the upper and lower bridge arms of the first motor controller to move back and forth and switch.

[0163] By selectively controlling the three-phase currents of the motor to be in phase and with the same amplitude, the amount of linkage of the combined magnetic field generated by the motor windings when energized can be minimized on the rotor side, thereby reducing the problem of eddy current losses due to changes in the magnetic field at the rotor.

[0164] The dual motors may be permanent magnet motors and induction motors, and low-temperature pulse heating can be achieved. Furthermore, by supplying a three-phase current to the first motor, the second motor can perform the above-mentioned self-heating control as one of the three phases. The effect obtained accordingly is that the inductance of the second motor changes from the original parallel connection of three phase inductances to a single-phase inductance and participates in the heating process, slightly increasing the amount of inductance involved in energy conversion. As a result, the rate of change of the heating current becomes more gradual, and the peak value of the heating current on the motor side can be effectively improved within the same voltage platform and control time.

[0165] Finally, as heating begins, the BMS determines whether there are any temperature abnormalities in the battery group. If there are abnormalities, it sends temperature abnormality information to the vehicle control unit, which then forwards the temperature abnormality information to the MCU, causing the motor controller to stop operating and the battery pack to switch back to its initial state.

[0166] Simultaneously with heating, the BMS determines whether the battery group temperature has reached the required level. If it has, the vehicle control unit transmits driving pulse heating stop information to the motor controller, stops heating, and switches the battery pack to the initial mode. If it has not reached the required level, the above heating process is repeated until the heating temperature reaches the required level.

[0167] The charge-discharge method of the embodiment of this application improves upon the problem of the low heating rate of conventional batteries and significantly increases the heating rate of the battery pack.

[0168] In a fourth aspect, the present invention is a computing device comprising a memory for storing executable commands and a processor for connecting to the memory to complete any one of the charging / discharging methods of the third aspect by executing the executable commands.

[0169] The computing device provided by the embodiment of the present invention has two energy storage elements connected via a first adjustment switch module, which performs heating control after the switch is turned on, and can flexibly adjust the charge-discharge loop between the power battery and the energy storage elements without changing the original motor structure, thereby reducing costs and improving the heating speed by flexibly adjusting the self-heating scheme of the battery due to the charging and discharging of the dual drive motor.

[0170] In a fifth aspect, the present invention relates to a computer-readable storage medium in which a computer program is stored, the computer program being executed by a processor to implement any one of the charging and discharging methods of the third aspect.

[0171] The computer-readable storage medium provided by the embodiment of the present invention has two energy storage elements connected via a first adjustment switch module, which performs heating control after the switch is turned on, and can flexibly adjust the charge-discharge loop between the power battery and the energy storage elements without changing the original motor structure, thereby reducing costs and improving the heating speed by flexibly adjusting the self-heating scheme of the battery due to the charging and discharging of the dual drive motor.

[0172] The descriptions of each of the above embodiments tend to emphasize the differences between them, and their similarities or identical features, which can be referenced to one another, are omitted in this specification for the sake of brevity.

[0173] Figure 19 shows a schematic diagram of the structure of a computing device 400 according to an embodiment of the present invention.

[0174] As shown in Figure 19, the computing device 400 includes a memory 402 for storing executable commands and a processor 401 connected to the memory 402 to complete the charging and discharging method by executing the executable commands.

[0175] As those skilled in the art will understand, schematic Figure 19 is merely an example of a computing device 400 and does not constitute a limitation of the computing device 400, and may include more or fewer components than those shown, or a combination of some components, or different components, for example, the computing device 400 may further include input / output devices, network access devices, buses, etc.

[0176] The so-called processor 401 may be a Central Processing Unit (CPU), or it may be another general-purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or another programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor, or the processor 401 may be any conventional processor, etc. The processor 401 is the control center of the computing device 400 and is connected to various parts of the entire computing device 400 using various interfaces and lines.

[0177] Memory 402 may be used to store computer-readable commands, and the processor 401 realizes various functions of the computing device 400 by operating or executing computer-readable commands or modules stored in memory 402 and by calling data stored in memory 402. Memory 402 may mainly include a program storage area that can store an operating system, an application program required for at least one function (e.g., audio playback function, image playback function, etc.), and a data storage area that can store data created in accordance with the use of the computing device 400. Furthermore, memory 402 may include a hard disk, memory, plug-in hard disk, Smart Media Card (SMC), SD memory (Secure Digital, SD) card, flash memory card, at least one magnetic disk storage device, flash memory device, read-only memory (ROM), random access memory (RAM), or other non-volatile / volatile storage devices.

[0178] The modules integrated into the computing device 400 may be implemented in the form of software functional modules and, if sold or used as independent products, may be stored on a single computer-readable storage medium. Based on this understanding, the present invention may also implement all or part of the flow in the methods of the above embodiments by instructing the relevant hardware with computer-readable commands stored on a computer-readable storage medium, the computer-readable commands which, when executed by a processor, can implement the steps of each embodiment of the above embodiments.

[0179] The voltage regulator for the power module 10 provided in the embodiment of the present invention controls a first adjustment switch module to connect the first power battery 101 and the second power battery 102 in series or in parallel, and simultaneously controls the switch module to adjust the charging and discharging between the power module 10 and the energy storage element 21. Furthermore, it enables flexible adjustment of the charging and discharging of the power module 10 in various scenarios and flexible adjustment of the self-heating method of the battery. When the battery temperature or battery energy is below a predetermined temperature, a high-frequency current heating mode is adopted. When the battery temperature or battery energy is above a predetermined temperature, a low-frequency current heating mode is adopted.

[0180] Finally, the present invention provides a computer-readable storage medium in which a computer program is stored, and the computer program is executed by a processor to implement a method for charging and discharging a power battery.

[0181] Those skilled in the art will recognize that each illustrative unit and algorithmic step described in the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application of the technical proposal and the design constraints. While experts in the art may implement the described functions using different methods for each specific application, such implementations should be considered within the scope of the present application.

[0182] Those skilled in the art will understand that, for the sake of convenience and brevity of explanation, the specific operating processes of the systems, apparatus, and units described above can be referenced from the corresponding processes in the embodiments of the above methods, and will therefore be omitted from this explanation.

[0183] In some embodiments provided herein, the systems, apparatus, and methods demonstrated may be implemented in other ways. For example, the embodiments of the apparatus described above are merely illustrative, and the division of the units described above is merely a division of logical functions, and in actual implementation, the divisions may be made in other ways. For example, multiple units or assemblies may be combined or integrated into other systems, or some of their features may be omitted or not performed. Furthermore, the combinations, direct combinations, or communication connections between the indicated or considered units may be indirect combinations or communication connections through several interfaces, apparatus, or units, and may be in electrical, mechanical, or other forms.

[0184] The units described as separating members may or may not be physically separated, and the members shown as units may or may not be physical units, may be located in one place, or may be distributed among multiple network units. Depending on the actual needs, some or all of these units can be selected to achieve the objectives of the solution of this embodiment.

[0185] Furthermore, each functional unit in each embodiment of the present application may be integrated into a single processing unit, each unit may exist individually in physical form, or two or more units may be integrated into a single unit.

[0186] The above functions may be implemented in the form of a software function unit and, if sold or used as an independent product, may be stored on a computer-readable storage medium. Based on this understanding, the proposed technology of the present application, essentially or in part with respect to the prior art, or in part with respect to the proposed technology, may be embodied in the form of a software product stored on a storage medium, which includes several commands for causing a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The storage medium may include various media capable of storing program code, such as USB memory, removable hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0187] The foregoing describes only specific embodiments of the present application, and the scope of protection is not limited thereto. Any changes or substitutions that a person skilled in the art could easily conceive within the scope of the art disclosed herein should also be included within the scope of protection. Accordingly, the scope of protection of the present application should be based on the scope of protection described in the claims.

Claims

1. A charge / discharge circuit, It includes a power module, a first heating module, a second heating module, and a first adjustment switch module, wherein both the first heating module and the second heating module are connected to the power module. The first heating module includes a first energy storage element, and the second heating module includes a second energy storage element. The power module includes multiple battery branches, The first adjustment switch module is connected between the first energy storage element and the second energy storage element. Charge / discharge circuit.

2. The first adjustment switch module is connected between the neutral point of the motor winding of the first energy storage element and the neutral point of the motor winding of the second energy storage element. The charge / discharge circuit according to claim 1.

3. The power module includes a first battery and a second battery, the first battery being connected to the first heating module and the second battery being connected to the second heating module. The charge / discharge circuit according to claim 1.

4. The power module includes a first battery and a second battery, and the charge / discharge circuit includes a second adjustment switch module connected between the first battery and the second battery, the first battery is connected to the first heating module, and the second battery is connected to the second heating module. The charge / discharge circuit according to claim 1.

5. The second adjustment switch module is connected between the positive terminal side of the first battery and the positive terminal side of the second battery. The charge / discharge circuit according to claim 4.

6. The second adjustment switch module is connected between the negative terminal side of the first battery and the negative terminal side of the second battery. The charge / discharge circuit according to claim 4.

7. The first heating module includes a first switch module, and the second heating module includes a second switch module. The positive terminal side of the first battery is connected to the upper bridge arm of the first switch module, the positive terminal side of the second battery is connected to the upper bridge arm of the second switch module, and the negative terminal side of the first battery is connected to the negative terminal side of the second battery, the lower bridge arm of the first switch module, and the lower bridge arm of the second switch module. The charge / discharge circuit according to claim 3.

8. The first heating module includes a first switch module, and the second heating module includes a second switch module. The positive terminal side of the first battery is connected to the positive terminal side of the second battery, the upper bridge arm of the first switch module, and the upper bridge arm of the second switch module; the negative terminal side of the first battery is connected to the lower bridge arm of the first switch module; and the negative terminal side of the second battery is connected to the lower bridge arm of the second switch module. The charge / discharge circuit according to claim 3.

9. Electrical equipment, The system includes a control module and a charge / discharge circuit according to any one of claims 1 to 8. The control module is connected to the first adjustment switch module, the first switch module included in the first heating module, and the second switch module included in the second heating module, and the control module is used to adjust the charging and discharging between the batteries of the power module. Electrical equipment.

10. A charge / discharge control method applicable to the electrical equipment described in claim 9, When the heating conditions are met, the first adjustment switch module is controlled to be electrically connected, To adjust the charging and discharging between the batteries of the aforementioned power module, A charge / discharge control method, including the following.

11. The power module includes a first battery and a second battery, and the charge / discharge circuit further includes a second adjustment switch module connected between the first battery and the second battery, and the charging and discharging between the batteries of the power module is adjusted. Disconnecting the second adjustment switch module, Adjusting the charging and discharging between the first battery and the second battery, The method according to claim 10, including the method described in claim 10.

12. The power module includes a first battery and a second battery, and the adjustment of charging and discharging between the batteries of the power module is, A first period of time during which the first battery is controlled to discharge into the second battery, A second period during which the second battery is controlled to discharge into the first battery, Includes, The control of the first period and the second period is continuously alternated. The method according to claim 10.

13. Controlling the discharge from the first battery to the second battery means Controlling the discharge from the first battery to the first energy storage element and the second energy storage element, Controlling the discharge from the first energy storage element and the second energy storage element to the second battery, The method according to claim 12, including the method described in claim 12.

14. The first heating module includes a first switch module, the second heating module includes a second switch module, the first switch module includes a first group of bridge arms, the second switch module includes a second group of bridge arms, the positive terminal side of the first battery is connected to the upper bridge arm of the first switch module, the positive terminal side of the second battery is connected to the upper bridge arm of the second switch module, and the negative terminal side of the first battery is connected to the negative terminal side of the second battery, the lower bridge arm of the first switch module, and the lower bridge arm of the second switch module. Controlling the discharge from the first battery to the second battery means Controlling the upper bridge arm of any phase in the first group of bridge arms and the lower bridge arm of any phase in the second group of bridge arms to conduct electricity, Controlling the lower bridge arm of the aforementioned second group of bridge arms to disconnect the conductive bridge arm, while simultaneously connecting the upper bridge arm corresponding to the disconnected bridge arm. The method according to claim 12, including the method described in claim 12.

15. The first heating module includes a first switch module, the second heating module includes a second switch module, the first switch module includes a first group of bridge arms, the second switch module includes a second group of bridge arms, the positive terminal side of the first battery is connected to the positive terminal side of the second battery, the upper bridge arm of the first switch module, and the upper bridge arm of the second switch module, the negative terminal side of the first battery is connected to the lower bridge arm of the first switch module, and the negative terminal side of the second battery is connected to the lower bridge arm of the second switch module. Controlling the discharge from the first battery to the second battery means Controlling the upper bridge arm of any phase in the second group of bridge arms and the lower bridge arm of any phase in the first group of bridge arms to conduct electricity, Controlling the upper bridge arm of the aforementioned second group of bridge arms to disconnect the conductive bridge arm, while simultaneously connecting the lower bridge arm corresponding to the disconnected bridge arm. The method according to claim 12, including the method described in claim 12.

16. The above action controls the discharge from the second battery to the first battery, Controlling the discharge from the second battery to the first energy storage element and the second energy storage element, Controlling the discharge from the first energy storage element and the second energy storage element to the first battery, The method according to claim 12, including the method described in claim 12.

17. The first heating module includes a first switch module, the second heating module includes a second switch module, the first switch module includes a first group of bridge arms, the second switch module includes a second group of bridge arms, the positive terminal side of the first battery is connected to the upper bridge arm of the first switch module, the positive terminal side of the second battery is connected to the upper bridge arm of the second switch module, and the negative terminal side of the first battery is connected to the negative terminal side of the second battery, the lower bridge arm of the first switch module, and the lower bridge arm of the second switch module. The above action controls the discharge from the second battery to the first battery, Controlling the upper bridge arm of any phase in the second group of bridge arms and the lower bridge arm of any phase in the first group of bridge arms to conduct electricity, Controlling the lower bridge arm of the aforementioned first group of bridge arms to be electrically connected, and the upper bridge arm corresponding to the disconnected bridge arm to be electrically connected, The method according to claim 12, including the method described in claim 12.

18. The first heating module includes a first switch module, the second heating module includes a second switch module, the first switch module includes a first group of bridge arms, the second switch module includes a second group of bridge arms, the positive terminal side of the first battery is connected to the positive terminal side of the second battery, the upper bridge arm of the first switch module, and the upper bridge arm of the second switch module, the negative terminal side of the first battery is connected to the lower bridge arm of the first switch module, and the negative terminal side of the second battery is connected to the lower bridge arm of the second switch module. The above action controls the discharge from the second battery to the first battery, Controlling the upper bridge arm of any phase in the first group of bridge arms and the lower bridge arm of any phase in the second group of bridge arms to conduct electricity, Controlling the upper bridge arm of the aforementioned first group of bridge arms to disconnect the conductive upper bridge arm, and to connect the upper bridge arm corresponding to the disconnected bridge arm, The method according to claim 12, including the method described in claim 12.

19. A computing device, Memory for storing executable commands, A processor connected to memory is provided to complete the method of claim 10 by executing an executable command. Computing devices, including [this].

20. A computer-readable storage medium on which computer programs are stored, A computer-readable storage medium on which the computer program is executed by a processor, for the purpose of realizing the method according to claim 10.

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