Energy recovery control method and device, vehicle and equipment

Abstract

The invention relates to an energy recovery control method and device, a vehicle and equipment, and the method comprises the steps that in the energy recovery process of the vehicle, whether motor power generation energy meets a first condition or not is judged, and the first condition represents that the energy recovery capacity of a battery assembly is insufficient to recover the motor power generation energy; under the condition that the first condition is met, the energy recovery circuit is controlled to charge the battery assembly, and the energy recovery circuit is controlled to output first energy charging voltage to the energy storage assembly; the energy recovery circuit is used for transmitting power generation energy of the motor to the battery assembly and the energy storage assembly. The energy storage assembly can be used as a buffer for battery energy charging, energy recovery and conversion pressure is relieved, it is avoided that more energy is adopted to directly charge the battery assembly, and consequently the health of the battery is affected, electric energy stored in the energy storage assembly is not wasted, the battery assembly can be charged at other time, and the service life of the battery assembly is prolonged. And therefore, the overall energy recovery efficiency is obviously improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, in particular to the field of vehicle kinetic energy recovery technology, and specifically to an energy recovery control method, device, vehicle and equipment. Background Art

[0002] As the global energy transition and carbon neutrality goals progress, energy recovery technology for new energy vehicles has become a key area for improving energy efficiency, significantly extending driving range and reducing energy consumption. Current mainstream technologies include regenerative braking and coasting energy recovery, but their implementation still faces multiple challenges, such as energy loss.

[0003] One related technology proposes collecting the power consumption of an electric vehicle and comparing it with a preset minimum power consumption threshold for its electrical accessories. When the total power consumption exceeds the preset minimum power consumption threshold, the electric vehicle's energy recovery weighted control function is activated to improve the vehicle's energy recovery efficiency and thus its driving range. However, this technology does not address the issue of excessive energy recovery, which can affect battery health due to inability to consume the battery.

[0004] Another related technology proposes to recover energy by adding supercapacitors, but supercapacitors are large in size, have low energy density, and are high in cost, making them unsuitable for widespread use in vehicles. Summary of the Invention

[0005] This application provides an energy recovery control method, device, vehicle, and equipment to at least address the technical problem in related technologies where excessive energy recovery causes the battery to be unable to consume energy, thereby affecting battery health. The technical solution of this application is as follows: According to a first aspect of the present application, there is provided an energy recovery control method, comprising: during energy recovery of a vehicle, determining whether the energy generated by a motor satisfies a first condition, the first condition indicating that the energy recovery capacity of the battery assembly is insufficient to recover the energy generated by the motor; When the first condition is met, the energy recovery circuit is controlled to charge the battery assembly, and the energy recovery circuit is controlled to output a first charging voltage to the energy storage assembly; the energy recovery circuit is used to transfer the energy generated by the motor to the battery assembly and the energy storage assembly.

[0006] According to the above technical means, the present application sets up an energy recovery circuit, which is used to transfer the energy generated by the motor to the battery assembly and the energy storage assembly. When the energy recovery capacity of the battery assembly is not enough to recover the energy generated by the motor, the energy recovery circuit is controlled to input a high voltage, so that more energy generated by the motor is stored in the energy storage assembly. The energy storage assembly can serve as a buffer for battery charging, alleviate the pressure of energy recovery conversion, and avoid using more energy to directly charge the battery assembly, which affects the health of the battery. In addition, the electrical energy stored in the energy storage assembly is not wasted, and can also be used to charge the battery assembly at other times, thereby significantly improving the overall energy recovery efficiency.

[0007] In one possible implementation, the battery assembly includes a power battery pack and a storage battery pack; and the method further includes: If the first condition is not met, determining whether the energy generated by the motor meets a second condition, where the second condition indicates that the energy recovery capability of the battery pack is sufficient to recover the energy generated by the motor; When the second condition is met, the energy recovery circuit is controlled to charge the battery pack, and the energy recovery circuit is controlled to output a second charging voltage to the energy storage component; wherein the second charging voltage is lower than the first charging voltage.

[0008] In one possible implementation, the method further includes: If the second condition is not met, determining whether the energy generated by the motor meets a third condition, where the third condition indicates that the energy recovery capability of the power battery pack is sufficient to recover the energy generated by the motor; When the third condition is met, the energy recovery circuit is controlled to charge the power battery pack, and the energy recovery circuit is controlled to output a second charging voltage to the energy storage component.

[0009] In one possible implementation, the method further includes: When the third condition is not met, the energy recovery circuit is controlled to charge the power battery pack and the storage battery pack, and the energy recovery circuit is controlled to output the second charging voltage to the energy storage component.

[0010] In one possible implementation, the energy recovery capability of a battery assembly is determined based on the battery status of the battery assembly, and the energy recovery capability represents the upper limit of energy supported for recovery by the battery assembly; the battery status includes at least one of temperature, voltage, and remaining battery power.

[0011] In one possible implementation, the energy storage component is a thin film capacitor.

[0012] According to the second aspect provided by the present application, an energy recovery control device is provided, including: a first judgment module, used to judge whether the energy generated by the motor meets a first condition during the process of energy recovery of the vehicle, the first condition indicating that the energy recovery capacity of the battery assembly is insufficient to recover the energy generated by the motor; a first control module, used to control the energy recovery circuit to charge the battery assembly when the first condition is met, and to control the energy recovery circuit to output a first charging voltage to the energy storage assembly; wherein the first charging voltage is higher than a first threshold value; the energy recovery circuit is used to transfer the energy generated by the motor to the battery assembly and the energy storage assembly.

[0013] In one possible implementation, the battery assembly includes a power battery pack and a storage battery pack, and the device further includes: a second judgment module, configured to judge whether the energy generated by the motor satisfies a second condition when the first condition is not satisfied, wherein the second condition indicates that the energy recovery capability of the battery pack is sufficient to recover the energy generated by the motor; The second control module is used to control the energy recovery circuit to charge the battery pack and control the energy recovery circuit to output a second charging voltage to the energy storage component when the second condition is met; wherein the second charging voltage is lower than the second threshold.

[0014] In one possible implementation, the device further includes: a third judgment module, configured to judge whether the energy generated by the motor satisfies a third condition when the second condition is not satisfied, wherein the third condition indicates that the energy recovery capability of the power battery pack is sufficient to recover the energy generated by the motor; The third control module is used to control the energy recovery circuit to charge the power battery pack and control the energy recovery circuit to output a second charging voltage to the energy storage component when the third condition is met.

[0015] In one possible implementation, the device further includes: The fourth control module is used to control the energy recovery circuit to charge the power battery pack and the storage battery pack when the third condition is not met, and to control the energy recovery circuit to output a second charging voltage to the energy storage component.

[0016] In one possible implementation, the energy recovery capability of a battery assembly is determined based on the battery status of the battery assembly, and the energy recovery capability represents the upper limit of energy supported for recovery by the battery assembly; the battery status includes at least one of temperature, voltage, and remaining battery power.

[0017] In one possible implementation, the energy storage component is a thin film capacitor.

[0018] In one possible implementation, the energy recovery circuit includes: an input capacitor, a coupling capacitor, a first inductor, a second inductor, a switch tube, and a diode; wherein the input capacitor is used to store the energy generated by the motor; When the switch tube is turned on, the input capacitor, the second inductor, and the switch tube form a first loop, and the input capacitor in the first loop charges the second inductor; the first inductor, the coupling capacitor, and the switch tube form a second loop, and the coupling capacitor in the second loop charges the first inductor; When the switch tube is turned off, the input capacitor, the second inductor, the coupling capacitor, the diode and the energy storage component form a third loop, and in the third loop, the first inductor charges the energy storage component through the diode; The controlling the energy recovery circuit to output the first charging voltage to the energy storage component includes: The duty cycle of the switch tube is controlled so that the energy recovery circuit outputs the first charging voltage to the energy storage component.

[0019] According to a third aspect provided by the present application, a vehicle is provided, the vehicle including the energy recovery control device in the second aspect.

[0020] According to the fourth aspect provided by the present application, an electronic device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute instructions to implement the method of the above-mentioned first aspect and any possible implementation method thereof.

[0021] According to the fifth aspect provided by the present application, a computer-readable storage medium is provided. When the instructions in the computer-readable storage medium are executed by the processor of an electronic device, the electronic device is enabled to execute the method in the above-mentioned first aspect and any possible implementation method thereof.

[0022] According to the sixth aspect provided by the present application, a computer program product is provided, which includes computer instructions. When the computer instructions are executed on an electronic device, the electronic device executes the method of the above-mentioned first aspect and any possible implementation method thereof.

[0023] It should be noted that the technical effects brought about by any implementation method in the second to sixth aspects can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here.

[0024] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0026] Figure 1 is a flow chart showing an energy recovery control method according to an exemplary embodiment; Figure 2 is a structural schematic diagram of an energy recovery system according to an exemplary embodiment; Figure 3 is a structural diagram of an energy recovery circuit according to an exemplary embodiment; Figure 4 is a flow chart showing another energy recovery control method according to an exemplary embodiment; Figure 5 is a block diagram of an energy recovery control device according to an exemplary embodiment; Figure 6 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0027] In order to enable ordinary people in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0028] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0029] In related technologies, energy recovery systems use an inverter to rectify the energy generated by the motor into a capacitor, which is then stored in a battery pack via a direct current-to-direct current (DCDC) controller. This method is significantly affected by the battery's condition. When a large amount of energy needs to be recovered but the battery pack cannot consume it, battery health is affected. Furthermore, the overall energy recovery efficiency is low.

[0030] In order to solve the above problems, the present invention proposes an energy recovery control method, device, vehicle and equipment.

[0031] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0032] The energy recovery control method provided in the embodiments of the present application can be applied in a vehicle. A vehicle may also be referred to as a vehicle, a mobile carrier, an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), a fuel cell vehicle (FCV), an autonomous vehicle, an intelligent and connected vehicle (ICV), or a driverless vehicle.

[0033] In the embodiments of this application, the vehicle may be a sedan, a sport utility vehicle (SUV), a truck, an electric vehicle, a motorcycle, a tricycle, a special vehicle (such as an ambulance, fire truck, or police car), a driverless taxi, an intelligent connected bus, an autonomous logistics vehicle, an electric truck, etc. Furthermore, this method is also applicable to various specialized vehicles, such as agricultural vehicles, mining vehicles, forestry vehicles, airport vehicles, and port vehicles. This application does not impose any specific restrictions on this.

[0034] For ease of understanding, the energy recovery control method provided in this application is described in detail below with reference to the accompanying drawings.

[0035] The present application embodiment provides an energy recovery control method, such as Figure 1 As shown, the energy recovery control method includes the following steps: S101: During energy recovery of the vehicle, it is determined whether the energy generated by the motor satisfies a first condition, where the first condition indicates that the energy recovery capability of the battery assembly is insufficient to recover the energy generated by the motor.

[0036] Energy recovery, also known as kinetic energy recovery, is a technology that improves energy efficiency by recovering braking energy. The basic principle of this technology is that when decelerating or braking, the electric motor switches to generator mode, converting the vehicle's kinetic energy into electrical energy, which is then stored in the battery.

[0037] The energy recovery control method provided in the embodiment of the present application can be applied to vehicles, and specifically to the energy recovery system in a vehicle. Figure 2 This article introduces the various modules included in the energy recovery system in the vehicle.

[0038] like Figure 2 As shown, the energy recovery system may include: battery pack, battery group, motor, battery management system, on-board charger (OBC), DCDC controller, drive controller, vehicle controller, high-voltage distribution box, and energy storage components. Detailed introduction is as follows: Battery pack: Also known as a power battery pack or a high-voltage power battery pack. It stores electrical energy and provides driving power for electric vehicles. It typically consists of multiple lithium-ion cells connected in series and parallel, supporting high power output and long driving range.

[0039] Battery pack: A low-voltage auxiliary battery (such as a 12V lead-acid battery) that powers low-voltage onboard equipment (such as lights and instruments), is isolated from the high-voltage system, and ensures the operation of basic vehicle functions.

[0040] Motor: Converts electrical energy into mechanical energy to drive the vehicle, or acts as a generator to recover energy during braking (such as a permanent magnet synchronous motor). The core components include the stator, rotor, and controller.

[0041] Battery monitoring and management system (BMS): monitors battery status in real time, manages charge and discharge balance and safety protection, extends battery life and optimizes performance.

[0042] OBC: Converts external AC power into DC power to charge the power battery, supports different power levels and charging protocols (such as national standards and European standards), and integrates safety isolation and intelligent control functions.

[0043] DCDC controller: Steps down the DC power of the high-voltage battery to a low voltage (e.g., 400V to 12V) to power the battery and low-voltage system.

[0044] Drive controller: Controls the motor's speed, torque, and energy recovery, converts DC power into three-phase AC power through an inverter, and achieves precise drive and dynamic response (such as vector control).

[0045] Vehicle controller: The vehicle's "brain," coordinating the powertrain (e.g., motor), energy distribution, driving mode, etc., to achieve optimal control and fault diagnosis based on sensor data.

[0046] High-voltage distribution box: distributes and manages high-voltage circuits (such as battery → motor / OBC / air conditioner, etc.). It has built-in relays and fuses to provide overload / short-circuit protection to ensure safe operation of the high-voltage system.

[0047] Energy storage components: These components are used to store some of the motor's discharged energy during the energy recovery process. In the embodiments of this application, the energy storage components can be thin-film capacitors. These capacitors absorb high-frequency ripple, stabilize the DC bus voltage, withstand high voltages, and offer low losses, improving system efficiency and reliability.

[0048] The modules can communicate with each other via the local interconnect network (LIN) protocol or the controller area network (CAN) protocol to achieve functions such as information transmission and driving functions.

[0049] In the embodiments of the present application, during the vehicle's energy recovery process, the motor switches to a power generation mode, and the energy generated by the motor can be rectified by an inverter into a unit capable of storing energy, such as a capacitor. This energy can be understood as electrical energy. The amount of energy generated by the motor can be measured by the voltage output from the inverter to the capacitor.

[0050] On the other hand, during the vehicle's energy recovery process, the energy recovery capacity of the battery pack is determined. The energy recovery capacity represents the amount of electrical energy that the battery pack can currently recover, and can also be understood as the amount of electrical energy that the battery pack can currently consume.

[0051] In embodiments of the present application, the energy recovery capability can be determined based on the battery status of the battery assembly. The battery status may include the battery voltage, temperature, and remaining state of charge (SOC). The SOC and voltage of a battery assembly are generally positively correlated, meaning that a higher SOC generally corresponds to a higher voltage.

[0052] Understandably, when the battery's SOC and voltage are high, the battery pack's energy recovery capability is poor when charging the battery pack using energy generated by kinetic energy recovery, resulting in less recovered energy. In other words, energy recovery capability is negatively correlated with the battery's SOC and voltage.

[0053] Furthermore, battery temperature can also affect energy recovery capabilities. At high temperatures, excessive charging of the battery pack using energy generated by kinetic energy recovery can affect battery health. Therefore, high battery temperatures also limit the energy recovery capabilities of the battery pack. In other words, energy recovery capability is negatively correlated with battery temperature.

[0054] In some embodiments of the present application, the relationship between energy recovery capability and battery status can be pre-determined. For example, a mapping table between energy recovery capability and battery status can be pre-established. During energy recovery in the vehicle, the energy recovery capability can be directly mapped based on the battery status. The battery status can include voltage, temperature, and SOC.

[0055] Furthermore, it can be determined whether the energy generated by the motor satisfies a first condition. The first condition indicates that the energy recovery capability of the battery assembly is insufficient to recover the energy discharged by the motor.

[0056] For example, if the energy recovery capability of the battery pack represents that the currently recoverable electric energy is M1 and the motor power generation energy is M2, if M1 is less than M2, it means that the battery pack is insufficient to completely recover the motor discharge energy.

[0057] S102: When the first condition is met, the energy recovery circuit is controlled to charge the battery assembly, and the energy recovery circuit is controlled to output a first charging voltage to the energy storage assembly; the energy recovery circuit is used to transfer the energy generated by the motor to the battery assembly and the energy storage assembly.

[0058] Specifically, when the first condition is met, the battery assembly is not sufficient to recover all the motor generated energy. If the motor discharge energy is still transferred to the battery assembly through the circuit to charge the battery assembly, it is likely to affect the health of the battery and result in poor energy recovery efficiency.

[0059] In this embodiment of the present application, an energy recovery circuit is integrated on the driver board. When the vehicle is in the energy recovery phase, the energy discharged by the motor is transferred to the battery assembly and energy storage assembly to charge the battery assembly, and some of the recovered energy is stored in the energy storage assembly. In other words, the energy recovery circuit is used to transfer the energy generated by the motor to the battery assembly and energy storage assembly.

[0060] Furthermore, the voltage output by the energy recovery circuit is adjustable. If the energy recovery circuit outputs a high voltage, more energy can be stored in the energy storage component. The energy storage component can also serve as a buffer for battery charging, preventing the use of excessive energy to charge the battery component, which could affect battery health. If the energy recovery circuit outputs a low voltage, less energy can be stored in the energy storage component, ensuring the battery component's efficiency in recovering electrical energy. Furthermore, there's no need to use supercapacitors, which would increase overall design costs, making this design economical, practical, and efficient.

[0061] In some embodiments of the present application, the energy storage component may be a film capacitor. A film capacitor is a capacitor with a plastic film as a dielectric, which has advantages such as non-polarity, high insulation impedance, excellent frequency characteristics (wide frequency response), and low dielectric loss.

[0062] In some embodiments of the present application, the energy recovery circuit includes: an input capacitor, a coupling capacitor, a first inductor, a second inductor, a switch tube, and a diode; wherein the input capacitor is used to store the energy generated by the motor; When the switch tube is turned on, the input capacitor, the second inductor and the switch tube form a first loop, in which the input capacitor charges the second inductor; the first inductor, the coupling capacitor and the switch tube form a second loop, in which the coupling capacitor charges the first inductor; When the switch is turned off, the input capacitor, the second inductor, the coupling capacitor, the diode and the energy storage component form a third loop, and the first inductor in the third loop charges the energy storage component through the diode; Controlling the energy recovery circuit to output a first charging voltage to the energy storage component includes: The duty cycle of the switch tube is controlled so that the energy recovery circuit outputs a first charging voltage to the energy storage component.

[0063] Specifically, by setting up an energy recovery circuit, the energy generated by the motor is transferred to the energy storage component and charges the battery component.

[0064] To facilitate understanding, the circuits involved in the embodiments of the present application are introduced below with reference to the accompanying drawings.

[0065] See also Figure 3 M represents the motor. The six switching transistors SW1-SW6 form the inverter. K1 is the switching transistor between the bus voltage and the inverter. C1 is a thin-film capacitor that performs filtering, energy storage, and power device protection. C3 is a capacitor placed before the inverter, providing energy storage and filtering. During the energy recovery phase, when the energy recovery circuit is operating, capacitor C3 serves as the input capacitor for the energy recovery circuit. Because the energy recovery circuit has a wide input voltage range and the recovered energy is not as high as the motor's normal operation, this capacitor does not require the same large capacity as a thin-film capacitor and only needs to meet the normal operation requirements of the energy recovery circuit.

[0066] like Figure 3 As shown, the input capacitor C3, diode D1, first inductor L1, coupling capacitor C2, switch K2, and second inductor L2 form an energy recovery circuit. When switch K2 is turned on, the input capacitor C3, second inductor L2, and switch K2 form a first loop, in which the input capacitor C3 charges the second inductor L2. The first inductor L1, coupling capacitor C2, and switch K2 form a second loop, in which the coupling capacitor C2 charges the first inductor L1.

[0067] When the switch tube K2 is turned off, the input capacitor C3, the second inductor L2, the coupling capacitor C2, the diode D1 and the energy storage component form a third loop. In the third loop, the first inductor L1 charges the energy storage component through the diode D1.

[0068] Specifically, D1 conducts unidirectional freewheeling and blocks reverse current; the first inductor L1 acts as a secondary inductor and works in conjunction with the second inductor L2 (main inductor) to transfer energy through the coupling capacitor; C2 is a coupling capacitor, which is alternately charged and discharged when the switch tube K2 is turned on and off, realizing energy coupling between the input and output, and also blocking the DC path between the input and output, allowing the output voltage to be lower or higher than the input voltage; K2 is a switch tube, which can adjust the output voltage of the energy recovery circuit by changing the conduction time (duty cycle) and control the energy transfer path from the input to the inductor and coupling capacitor; L2 acts as the main inductor, storing energy when the switch tube K2 is turned on, and transferring energy to the output end through the coupling capacitor and diode when the switch tube is turned off.

[0069] The circuit operates as follows: When the vehicle is in normal operation, switch K1 is on, and the bus voltage on film capacitor C1 is supplied to the inverter to drive the motor. When the vehicle is braking, switch K1 is off, and the energy generated by the motor is first rectified by the inverter and transferred to capacitor C3. The energy recovery circuit then converts the voltage on capacitor C3 to a suitable voltage and recycles it to the film capacitor.

[0070] As described above, the output voltage of the energy recovery circuit is adjustable. In an embodiment of the present application, when the first condition is met, the energy recovery circuit is controlled to charge the battery assembly and to output a first charging voltage to the energy storage assembly. The first charging voltage can be a relatively high voltage, for example, higher than a first threshold.

[0071] Specifically, when the battery pack is not sufficient to recover all the energy generated by the motor, the energy recovery circuit can be controlled to input a higher charging voltage, and a higher charging voltage can be used to charge the thin film capacitor, so that more electrical energy can be stored in the thin film capacitor, avoiding using more energy to charge the battery pack and affecting the health of the battery.

[0072] It is understandable that since energy recovery is a phase, charging the thin-film capacitor and battery assembly using the energy recovery circuit is also a process. Therefore, controlling the output charging voltage of the energy recovery circuit can also be dynamically variable. In other words, the above-mentioned first charging voltage is not a fixed value, but can be a dynamically changing value, provided that the first charging voltage is at a high level, for example, the first charging voltage is higher than a first threshold.

[0073] For example, in an embodiment of the present application, the input voltage (C3) and the output voltage (C1) of the energy recovery circuit can be detected in real time, and both can be used as feedback voltages to dynamically adjust the duty cycle of the switch tube K2 to achieve the effect of dynamically adjusting the output voltage.

[0074] See also Figure 3When switch K2 is on, the first circuit is C3-L2-K2, where the input coupling capacitor C3 charges inductor L2. In the second circuit, L1-C2-K2, coupling capacitor C2 charges inductor L1. When switch K2 is off, the first circuit, C3-L2-C2-D1-C1, is used. Capacitor C3 and inductor L2 simultaneously charge coupling capacitor C2 and transfer energy to the output. In the second circuit, L1-D1-C1, inductor L1 charges film capacitor C1 via diode D1. Thus, by adjusting the duty cycle of switch K2, the energy recovery circuit can achieve both boost and buck control, providing flexible control.

[0075] It is understandable that Figure 3 The energy recovery circuit shown can be viewed as a single-ended primary inductor converter (SEPIC) circuit. SEPIC is a DC-DC converter that allows the output voltage to be greater than, less than, or equal to the input voltage. Figure 3 The circuit structure shown is only one implementation method of the embodiment of the present application. The embodiment of the present application does not limit the specific structure of the energy recovery circuit. Any circuit structure that can dynamically control the output voltage so that the output voltage is greater than, less than or equal to the input voltage can be used as the energy recovery circuit provided in the embodiment of the present application to realize the transfer of motor generated energy to the battery assembly and the energy storage assembly.

[0076] In the embodiment of the present application, the charging voltage output by the energy recovery circuit can also be used to charge the battery assembly.

[0077] Specifically, the battery assembly may include a power battery pack and a storage battery pack. In an embodiment of the present application, a first charging circuit for charging the power battery pack and a second charging circuit for charging the storage battery may be provided, and both the first charging circuit and the second charging circuit are connected to the energy recovery circuit. The first charging circuit includes a power battery pack, an on-board charger, and a high-voltage distribution box. The input end of the on-board charger is connected to the output voltage of the energy recovery circuit through the high-voltage distribution box, thereby converting part of the energy generated by the motor into the power battery pack. The second charging circuit includes a storage battery pack, a DC-DC controller, and a high-voltage distribution box. The input end of the DC-DC controller is connected to the output voltage of the energy recovery circuit through the high-voltage distribution box, thereby converting part of the energy generated by the motor into the storage battery pack.

[0078] Using the energy recovery control method provided in an embodiment of the present application, during vehicle energy recovery, a determination is made as to whether the motor-generated energy meets a first condition, where the first condition indicates that the energy recovered from the battery assembly is insufficient to recover the motor-generated energy. If the first condition is met, the energy recovery circuit is controlled to charge the battery assembly and to output a first charging voltage to the energy storage assembly.

[0079] It can be seen that an energy recovery circuit is provided, and the energy recovery circuit is used to transfer the energy generated by the motor to the battery assembly and the energy storage assembly. When the energy recovery capacity of the battery assembly is insufficient to recover the energy generated by the motor, the energy recovery circuit is controlled to input a high voltage, thereby storing more energy generated by the motor in the energy storage assembly. The energy storage assembly can serve as a buffer for battery charging, alleviate the pressure of energy recovery conversion, and avoid using more energy to directly charge the battery assembly, which may affect the health of the battery. In addition, the electrical energy stored in the energy storage assembly is not wasted, and can also be used to charge the battery assembly at other times, thereby significantly improving the overall energy recovery efficiency.

[0080] In some embodiments of the present application, the method further includes: if the first condition is not met, determining whether the energy generated by the motor meets a second condition, where the second condition indicates that the energy recovery capability of the battery pack is sufficient to recover the energy generated by the motor. If the second condition is met, controlling the energy recovery circuit to charge the battery pack and controlling the energy recovery circuit to output a second charging voltage to the energy storage component; wherein the second charging voltage is lower than the first charging voltage.

[0081] Specifically, if the energy recovery capability of the battery assembly is sufficient to recover the energy generated by the motor, there is no need to store a large amount of energy in the energy storage assembly. Therefore, the energy recovery circuit can be controlled to output a second charging voltage to the energy storage assembly, where the second charging voltage is lower than the first charging voltage. Exemplarily, the second charging voltage is lower than a second threshold.

[0082] It is understandable that since energy recovery is a phase, charging the thin-film capacitor and battery assembly based on the energy recovery circuit is also a process. Therefore, the output charging voltage of the energy recovery circuit can also be dynamically controlled. In other words, the above-mentioned second charging voltage is not a fixed value, but can be a dynamically changing value, but it must be a low level, for example, the second charging voltage is lower than a second threshold. The second threshold can be pre-set.

[0083] Exemplarily, by adjusting the duty cycle of a specific switching transistor in the SEPIC circuit, the SEPIC circuit is controlled to output a lower voltage to the energy storage component.

[0084] Since the battery pack is a low-voltage auxiliary battery that supplies power to low-voltage equipment on board, while the power battery pack is a high-voltage battery that provides driving energy for the vehicle, the energy recovery capability of the battery pack is usually lower than that of the power battery pack.

[0085] In an embodiment of the present application, when the first condition is not met, in order to determine whether it is currently suitable to charge the power battery pack, or to charge the storage battery pack, or to charge the power battery pack and the storage battery pack at the same time, it is possible to further determine whether the energy recovery capacity of the storage battery pack is sufficient to recover the energy generated by the motor.

[0086] It is understandable that if the battery pack's energy recovery capacity is sufficient to recover the motor's generated energy, it means that the motor's generated energy that currently needs to be recovered is relatively small, and it is not suitable to charge the power battery pack. Specifically, if the power battery pack is still to be charged, it is necessary to control the above-mentioned first charging circuit to be closed, that is, it is necessary to control the operation of the on-board charger. When the motor generated energy that needs to be recovered is relatively small, the efficiency of energy recovery using the first charging circuit may be low.

[0087] Therefore, if it is determined that the battery pack's energy recovery capacity is sufficient to recover the motor's generated energy, the energy recovery circuit can be controlled to charge only the battery pack. For example, only the second charging circuit is controlled to be closed, and a portion of the motor's generated energy is transferred to the battery pack based on the second charging circuit to charge the battery pack.

[0088] In some embodiments of the present application, the method further includes: if the second condition is not met, determining whether the energy generated by the motor meets a third condition, where the third condition indicates that the energy recovery capability of the power battery pack is sufficient to recover the energy generated by the motor. If the third condition is met, controlling the energy recovery circuit to charge the power battery pack and controlling the energy recovery circuit to output a second charging voltage to the energy storage component.

[0089] Specifically, based on the same reasons as the above embodiments, if the energy recovery capability of the battery assembly is sufficient to recover the energy generated by the motor, there is no need to store more energy in the energy storage assembly. Therefore, the energy recovery circuit can be controlled to output a second charging voltage lower than the second threshold to the energy storage assembly.

[0090] Exemplarily, by adjusting the duty cycle of a specific switching transistor in the SEPIC circuit, the SEPIC circuit is controlled to output a lower voltage to the energy storage component.

[0091] If the battery pack is insufficient to recover the energy generated by the motor, the system can further determine whether the power battery pack's energy recovery capability is sufficient to recover the energy generated by the motor. If the power battery pack's energy recovery capability is sufficient to recover the energy generated by the motor, it indicates that only the power battery pack is currently being charged, ensuring high energy recovery efficiency and eliminating the need to charge the battery pack. For example, only the first charging circuit is controlled to be closed, and a portion of the energy generated by the motor is transferred to the power battery pack based on the first charging circuit to charge the power battery pack.

[0092] In some embodiments of the present application, the method further includes: when the third condition is not met, controlling the energy recovery circuit to charge the power battery pack and the storage battery pack, and controlling the energy recovery circuit to output a second charging voltage to the energy storage component.

[0093] Specifically, based on the same reasons as the above embodiments, if the energy recovery capability of the battery assembly is sufficient to recover the energy generated by the motor, there is no need to store more energy in the energy storage assembly. Therefore, the energy recovery circuit can be controlled to output a second charging voltage with a lower voltage to the energy storage assembly.

[0094] In addition, if the energy recovery capability of the power battery pack is not sufficient to recover the energy generated by the motor, it is currently appropriate to charge the circuit battery pack and the storage battery pack at the same time to ensure a higher energy recovery efficiency.

[0095] Exemplarily, the first and second charging circuits are controlled to be closed simultaneously, and a portion of the energy generated by the motor is transferred to the power battery pack based on the first charging circuit to charge the power battery pack. Furthermore, a portion of the energy generated by the motor is transferred to the storage battery pack based on the second charging circuit to charge the storage battery pack.

[0096] For ease of understanding, combined Figure 4 The energy recovery control method provided in the embodiment of the present application is further introduced.

[0097] When the vehicle starts energy recovery, the vehicle controller receives the energy information generated by the motor and the battery status information (such as temperature, SOC, and voltage) through communication, and then processes the information.

[0098] like Figure 4 As shown, the following steps are included: S401: Calculate the motor power generation energy according to the vehicle operating conditions.

[0099] S402: Calculating the consumable motor power generation according to the status information of the battery assembly.

[0100] S403: Determine whether the battery pack and the storage battery can consume the power generated by the motor. If not, execute S404; if so, execute S405.

[0101] S404: The energy recovery circuit is driven to output a high voltage, and the DCDC controller and the OBC controller work simultaneously to charge the battery and the battery pack.

[0102] S405: Determine whether the battery can consume the power generated by the motor. If so, execute S406; if not, execute S407.

[0103] S406: Drive the energy recovery circuit to output a low voltage and charge the battery through the DCDC controller.

[0104] S407: Determine whether the battery pack can consume the power generated by the motor. If so, execute S408; if not, execute S409.

[0105] S408: Drive the energy recovery circuit to output a low voltage and charge the battery pack through the OBC controller.

[0106] S409: The energy recovery circuit is driven to output a high voltage, and the DCDC controller and the OBC controller work simultaneously to charge the battery and the battery pack.

[0107] It can be seen that the amount of motor power that can be consumed by the power battery pack and storage battery pack in the battery assembly is compared with the actual motor power, thereby controlling the energy recovery circuit to output high or low voltage. When outputting high voltage, more motor power can be stored in the energy storage component. The energy storage component can serve as a buffer for battery charging, alleviating the pressure of energy recovery conversion and avoiding the use of large amounts of energy to directly charge the battery assembly, which may affect battery health. In addition, the electrical energy stored in the energy storage component is not wasted and can be used to charge the battery assembly at other times, thereby significantly improving the overall energy recovery efficiency.

[0108] In the case of low output voltage, based on the amount of motor power that can be consumed by the power battery pack and the storage battery pack, it is further determined whether it is currently suitable to charge the power battery pack, charge the storage battery pack, or charge both the power battery pack and the storage battery pack at the same time, thereby achieving fine-grained differentiation and helping to improve the overall energy recovery efficiency.

[0109] In some embodiments, as Figure 5 As shown, the energy recovery control device may include: a first judgment module 501, which is used to judge whether the motor generated energy meets a first condition during the vehicle's energy recovery process, and the first condition indicates that the energy recovery capacity of the battery assembly is insufficient to recover the motor generated energy; a first control module 502, which is used to control the energy recovery circuit to charge the battery assembly and control the energy recovery circuit to output a first charging voltage to the energy storage assembly when the first condition is met; the energy recovery circuit is used to transfer the motor generated energy to the battery assembly and the energy storage assembly.

[0110] In one possible implementation, the battery assembly includes a power battery pack and a storage battery pack, and the device further includes: a second judgment module, configured to judge whether the energy generated by the motor satisfies a second condition when the first condition is not satisfied, wherein the second condition indicates that the energy recovery capability of the battery pack is sufficient to recover the energy generated by the motor; The second control module is used to control the energy recovery circuit to charge the battery pack and control the energy recovery circuit to output a second charging voltage to the energy storage component when the second condition is met; wherein the second charging voltage is lower than the first charging voltage.

[0111] In one possible implementation, the device further includes: a third judgment module, configured to judge whether the energy generated by the motor satisfies a third condition when the second condition is not satisfied, wherein the third condition indicates that the energy recovery capability of the power battery pack is sufficient to recover the energy generated by the motor; The third control module is used to control the energy recovery circuit to charge the power battery pack and control the energy recovery circuit to output a second charging voltage to the energy storage component when the third condition is met.

[0112] In one possible implementation, the device further includes: The fourth control module is used to control the energy recovery circuit to charge the power battery pack and the storage battery pack when the third condition is not met, and to control the energy recovery circuit to output a second charging voltage to the energy storage component.

[0113] In one possible implementation, the energy recovery capability of a battery assembly is determined based on the battery status of the battery assembly, and the energy recovery capability represents the upper limit of energy supported for recovery by the battery assembly; the battery status includes at least one of temperature, voltage, and remaining battery power.

[0114] In one possible implementation, the energy storage component is a thin film capacitor.

[0115] The present application also provides an electronic device, such as Figure 6 As shown, the electronic device includes but is not limited to: a processor 601 and a memory 602 .

[0116] The memory 602 is configured to store executable instructions of the processor 601. It is understood that the processor 601 is configured to execute instructions to implement the energy recovery control method in the above embodiment.

[0117] It should be noted that those skilled in the art can understand that Figure 6 The electronic device structure shown in the figure does not limit the electronic device, and the electronic device may include Figure 6 More or fewer components may be shown, or certain components may be combined, or the components may be arranged differently.

[0118] The processor 601 is the control center of the electronic device, connecting the various parts of the entire electronic device using various interfaces and lines. By running or executing software programs and / or modules stored in the memory 602 and accessing data stored in the memory 602, it performs various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. The processor 601 may include one or more processing units. Optionally, the processor 601 may integrate an application processor and a modem processor, wherein the application processor primarily processes the operating system, user interface, and application programs, while the modem processor primarily handles wireless communications. It is understood that the modem processor may not be integrated into the processor 601.

[0119] Memory 602 can be used to store software programs and various data. Memory 602 may primarily include a program storage area and a data storage area. The program storage area may store an operating system and application programs required by at least one functional module (such as a determination unit, a processing unit, etc.). Furthermore, memory 602 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0120] In an exemplary embodiment, a computer-readable storage medium including instructions is further provided, such as a memory 602 including instructions. The instructions may be executed by a processor 601 of an electronic device to implement the method in the above embodiment.

[0121] Optionally, the computer-readable storage medium may be a non-temporary computer-readable storage medium, for example, the non-temporary computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, etc.

[0122] In an exemplary embodiment, the present application also provides a computer program product including one or more instructions, which can be executed by the processor 601 of the electronic device to implement the method in the above embodiment.

[0123] It should be noted that when the instructions in the above-mentioned computer-readable storage medium or one or more instructions in the computer program product are executed by the processor of the electronic device, the various processes of the above-mentioned method embodiment are implemented and the same technical effect as the above-mentioned method can be achieved. To avoid repetition, they will not be repeated here.

[0124] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete the full classification or partial functions described above.

[0125] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0126] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0127] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0128] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application, or the part that contributes to the prior art, or the entire classification part or part of the technical solution can be embodied in the form of a software product. The software product is stored in a storage medium and includes a number of instructions for enabling a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute the entire classification part or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, ROM, RAM, disk or optical disk, etc., various media that can store program code.

[0129] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An energy recovery control method, characterized in that: The method comprises: During energy recovery of the vehicle, determining whether the energy generated by the motor meets a first condition, wherein the first condition indicates that the energy recovery capacity of the battery assembly is insufficient to recover the energy generated by the motor; When the first condition is met, the energy recovery circuit is controlled to charge the battery assembly, and the energy recovery circuit is controlled to output a first charging voltage to the energy storage assembly; the energy recovery circuit is used to transfer the energy generated by the motor to the battery assembly and the energy storage assembly.

2. The method according to claim 1, characterized in that The battery assembly includes a power battery pack and a storage battery pack; the method further includes: If the first condition is not met, determining whether the energy generated by the motor meets a second condition, where the second condition indicates that the energy recovery capability of the battery pack is sufficient to recover the energy generated by the motor; When the second condition is met, the energy recovery circuit is controlled to charge the battery pack, and the energy recovery circuit is controlled to output a second charging voltage to the energy storage component; wherein the second charging voltage is lower than the first charging voltage.

3. The method according to claim 2, characterized in that The method further comprises: If the second condition is not met, determining whether the energy generated by the motor meets a third condition, wherein the third condition indicates that the energy recovery capability of the power battery pack is sufficient to recover the energy generated by the motor; When the third condition is met, the energy recovery circuit is controlled to charge the power battery pack, and the energy recovery circuit is controlled to output the second charging voltage to the energy storage component.

4. The method according to claim 3, characterized in that The method further comprises: When the third condition is not met, the energy recovery circuit is controlled to charge the power battery pack and the storage battery pack, and the energy recovery circuit is controlled to output the second charging voltage to the energy storage component.

5. The method according to any one of claims 1 to 4, characterized in that The energy recovery capability of the battery assembly is determined based on the battery status of the battery assembly, and the energy recovery capability represents the upper limit of energy supported by the battery assembly for recovery; the battery status includes at least one of temperature, voltage and battery remaining power status.

6. The method according to any one of claims 1 to 4, characterized in that The energy storage component is a thin film capacitor.

7. The method according to claim 1, characterized in that The energy recovery circuit includes: an input capacitor, a coupling capacitor, a first inductor, a second inductor, a switch tube and a diode; wherein the input capacitor is used to store the energy generated by the motor; When the switch tube is turned on, the input capacitor, the second inductor, and the switch tube form a first loop, in which the input capacitor charges the second inductor; the first inductor, the coupling capacitor, and the switch tube form a second loop, in which the coupling capacitor charges the first inductor; When the switch tube is turned off, the input capacitor, the second inductor, the coupling capacitor, the diode and the energy storage component form a third loop, and in the third loop, the first inductor charges the energy storage component through the diode; The controlling the energy recovery circuit to output the first charging voltage to the energy storage component includes: The duty cycle of the switch tube is controlled so that the energy recovery circuit outputs the first charging voltage to the energy storage component.

8. An energy recovery control device, characterized in that: The device comprises: a first judgment module, configured to judge whether the energy generated by the motor satisfies a first condition during energy recovery of the vehicle, wherein the first condition indicates that the energy recovery capability of the battery assembly is insufficient to recover the energy generated by the motor; The first control module is used to control the energy recovery circuit to charge the battery assembly and control the energy recovery circuit to output a first charging voltage to the energy storage assembly when the first condition is met; the energy recovery circuit is used to transfer the energy generated by the motor to the battery assembly and the energy storage assembly.

9. The device according to claim 8, characterized in that The battery assembly includes a power battery pack and a storage battery pack; the device also includes: a second judgment module, configured to judge whether the energy generated by the motor satisfies a second condition when the first condition is not satisfied, wherein the second condition indicates that the energy recovery capability of the battery pack is sufficient to recover the energy generated by the motor; A second control module is used to control the energy recovery circuit to charge the battery pack and control the energy recovery circuit to output a second charging voltage to the energy storage component when the second condition is met; wherein the second charging voltage is lower than the first charging voltage.

10. The device according to claim 9, characterized in that The device further comprises: a third judgment module, configured to judge whether the energy generated by the motor satisfies a third condition when the second condition is not satisfied, wherein the third condition indicates that the energy recovery capability of the power battery pack is sufficient to recover the energy generated by the motor; The third control module is used to control the energy recovery circuit to charge the power battery pack and control the energy recovery circuit to output the second charging voltage to the energy storage component when the third condition is met.

11. A vehicle, characterized in that: The energy recovery control device comprises the energy recovery control device according to any one of claims 8 to 10.

12. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the method according to any one of claims 1 to 7.

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