Energy recovery control method and device, vehicle and equipment

Abstract

The application relates to an energy recovery control method and device, a vehicle and equipment. The method comprises the following steps: in the process of energy recovery of the vehicle, it is judged whether the motor power generation energy meets a first condition, the first condition representing that the energy recovery capability of a battery assembly is insufficient to recover the motor power generation energy; in the case of meeting the first condition, the energy recovery circuit is controlled to charge the battery assembly, and the energy recovery circuit is controlled to output a first energy charging voltage to a storage assembly; the energy recovery circuit is used for transmitting the motor power generation energy to the battery assembly and the storage assembly. The storage assembly can serve as a buffer for battery energy charging, relieve energy recovery conversion pressure, avoid affecting the battery health caused by directly charging the battery assembly with more energy, and the energy stored in the storage assembly is not wasted, and the storage assembly can also charge the battery assembly at other times, thereby significantly improving the overall energy recovery efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to the technical field of vehicle kinetic energy recovery, and specifically to an energy recovery control method and device, a vehicle and equipment. BACKGROUND

[0002] With the promotion of global energy transformation and carbon neutralization goals, the energy recovery technology of new energy vehicles has become one of the core directions to improve energy efficiency, which can significantly extend the cruising range and reduce energy consumption. The current mainstream technologies include regenerative braking, coasting energy recovery, etc., but their implementation still faces multiple challenges such as energy loss.

[0003] In one related technology, the consumed power of an electric vehicle is collected and compared with a preset minimum power consumption threshold of an electrical accessory. When the total consumed power is greater than the preset minimum power consumption threshold, the energy recovery weighting control function of the electric vehicle is turned on to improve the energy recovery efficiency of the electric vehicle and improve the cruising range of the electric vehicle. However, this technology cannot solve the problem that too much energy is recovered and the battery cannot consume it, thereby affecting the health of the battery.

[0004] Another related technology proposes to recover energy by increasing a super capacitor, but the super capacitor has a large volume, low energy density, and high cost, which is not suitable for general use on the whole vehicle. SUMMARY

[0005] The present application provides an energy recovery control method, device, vehicle and equipment to at least solve the technical problem of excessive energy recovery in related technologies, which affects the health of the battery because the battery cannot consume it. The technical solution of the present application is as follows:

[0006] According to the first aspect of the present application, an energy recovery control method is provided, comprising: during the process of energy recovery of a vehicle, judging whether the motor generated energy meets a first condition, the first condition representing that the energy recovery capability of a battery assembly is insufficient to recover the motor generated energy;

[0007] In the case where 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 transmit the motor generated energy to the battery assembly and the energy storage assembly.

[0008] According to the above technical means, the energy recovery circuit is arranged to transmit the motor-generated energy to the battery assembly and the energy storage assembly. In the case that the energy recovery capability of the battery assembly is insufficient to recover the motor-generated energy, the energy recovery circuit is controlled to input a high voltage, so that more motor-generated energy is stored in the energy storage assembly. The energy storage assembly can serve as a buffer for charging the battery, relieve the energy recovery conversion pressure, and avoid the impact on the battery health caused by directly charging the battery with more energy. Moreover, the energy stored in the energy storage assembly is not wasted, and can be used to charge the battery at other times, thereby significantly improving the overall energy recovery efficiency.

[0009] In a possible implementation, the battery assembly includes a power battery pack and a storage battery pack; and the method further includes:

[0010] In the case that the first condition is not met, it is determined whether the motor-generated energy meets a second condition, the second condition representing that the energy recovery capability of the storage battery pack is sufficient to recover the motor-generated energy;

[0011] In the case that the second condition is met, the energy recovery circuit is controlled to charge the storage battery pack, and the energy recovery circuit is controlled to output a second charging voltage to the energy storage assembly; and the second charging voltage is lower than the first charging voltage.

[0012] In a possible implementation, the method further includes:

[0013] In the case that the second condition is not met, it is determined whether the motor-generated energy meets a third condition, the third condition representing that the energy recovery capability of the power battery pack is sufficient to recover the motor-generated energy;

[0014] In the case that 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 assembly.

[0015] In a possible implementation, the method further includes:

[0016] In the case that 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 assembly.

[0017] In a possible implementation, the energy recovery capability of the battery assembly is determined based on a battery state of the battery assembly, and the energy recovery capability represents an upper limit of energy that can be recovered by the battery assembly; and the battery state includes at least one of a temperature, a voltage, and a battery remaining capacity state.

[0018] In a possible implementation, the energy storage assembly is a thin-film capacitor.

[0019] According to a second aspect provided in the present application, an energy recovery control device is provided, comprising: a first judging module configured to judge whether the motor-generated energy meets a first condition during energy recovery of the vehicle, the first condition indicating that the energy recovery capability of the battery assembly is insufficient to recover the motor-generated energy; a first control module configured 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, wherein the first charging voltage is higher than a first threshold; and the energy recovery circuit is configured to transfer the motor-generated energy to the battery assembly and the energy storage assembly.

[0020] In a possible implementation, the battery assembly comprises a power battery pack and a storage battery pack, and the device further comprises:

[0021] a second judging module configured to judge whether the motor-generated energy meets a second condition when the first condition is not met, the second condition indicating that the energy recovery capability of the storage battery pack is sufficient to recover the motor-generated energy;

[0022] a second control module configured to control the energy recovery circuit to charge the storage battery pack and control the energy recovery circuit to output a second charging voltage to the energy storage assembly when the second condition is met, wherein the second charging voltage is lower than a second threshold.

[0023] In a possible implementation, the device further comprises:

[0024] a third judging module configured to judge whether the motor-generated energy meets a third condition when the second condition is not met, the third condition indicating that the energy recovery capability of the power battery pack is sufficient to recover the motor-generated energy;

[0025] a third control module configured 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 assembly when the third condition is met.

[0026] In a possible implementation, the device further comprises:

[0027] a fourth control module configured to control the energy recovery circuit to charge the power battery pack and the storage battery pack and control the energy recovery circuit to output the second charging voltage to the energy storage assembly when the third condition is not met.

[0028] In a possible implementation, the energy recovery capability of the battery assembly is determined based on a battery state of the battery assembly, and the energy recovery capability indicates an upper limit of energy supported by the battery assembly for recovery; and the battery state comprises at least one of temperature, voltage, and battery remaining capacity state.

[0029] In a possible implementation, the energy storage assembly is a thin-film capacitor.

[0030] In a possible implementation manner, the energy recovery circuit comprises: an input capacitor, a coupling capacitor, a first inductor, a second inductor, a switch tube and a diode; wherein the input capacitor is configured to store the motor-generated energy.

[0031] 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 charges the second inductor in the first loop; the first inductor, the coupling capacitor and the switch tube form a second loop, and the coupling capacitor charges the first inductor in the second loop.

[0032] 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 the first inductor charges the energy storage component through the diode in the third loop.

[0033] The control of the energy recovery circuit to output the first charging voltage to the energy storage component comprises:

[0034] The duty cycle of the switch tube is controlled to enable the energy recovery circuit to output the first charging voltage to the energy storage component.

[0035] According to a third aspect provided in the present application, a vehicle is provided, and the vehicle comprises the energy recovery control device in the second aspect.

[0036] According to a fourth aspect provided in the present application, an electronic device is provided, comprising: a processor; a memory configured to store processor-executable instructions; wherein the processor is configured to execute the instructions to implement the method of the first aspect and any possible implementation manner thereof.

[0037] According to a fifth aspect provided in the present application, a computer-readable storage medium is provided, and when instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the method of the first aspect and any possible implementation manner thereof.

[0038] According to a sixth aspect provided in the present application, a computer program product is provided, and the computer program product comprises computer instructions, and when the computer instructions are executed on an electronic device, the electronic device executes the method of the first aspect and any possible implementation manner thereof.

[0039] It should be noted that the technical effects brought by any implementation manner of the second aspect to the sixth aspect can refer to the technical effects brought by the corresponding implementation manner of the first aspect, which will not be repeated here.

[0040] It should be understood that the general description and detailed description below are only exemplary and explanatory, and do not limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0041] The drawings incorporated in the specification include exemplary embodiments in accordance with the present application and serve to explain the principles of the present application, and do not constitute an undue limitation on the present application.

[0042] Figure 1 is a flowchart of an energy recovery control method according to an exemplary embodiment;

[0043] Figure 2 is a structural schematic diagram of an energy recovery system according to an exemplary embodiment;

[0044] Figure 3 is a structural schematic diagram of an energy recovery circuit according to an exemplary embodiment;

[0045] Figure 4 is a flowchart of another energy recovery control method according to an exemplary embodiment;

[0046] Figure 5 is a block diagram of an energy recovery control device according to an exemplary embodiment;

[0047] Figure 6 is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0048] In order for those skilled 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 described clearly and completely below in conjunction with the drawings.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0050] In the related art, the energy recovery system rectifies the energy generated by the motor to the capacitor through the inverter, and then stores it to the battery pack through the direct current to direct current (DCDC) controller. This way is greatly affected by the battery state. When the energy to be recovered is more, but the battery pack cannot consume more energy, it will affect the battery health. Moreover, the overall energy recovery efficiency is low.

[0051] To solve the above problems, the present application provides an energy recovery control method, device, vehicle and equipment.

[0052] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments.

[0053] The energy recovery control method provided by the embodiments of the present application can be applied in a vehicle. The vehicle can 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), a driverless vehicle, etc.

[0054] In the embodiments of the present application, the vehicle can be a car, a sport utility vehicle (SUV), a truck, an electric vehicle, a motorcycle, a tricycle, a special vehicle (such as an ambulance, a fire truck, a police car, etc.), a driverless taxi, an intelligent and connected bus, an autonomous logistics vehicle, an electric truck, etc. In addition, the method is also applicable to various special vehicles, such as agricultural vehicles, mining vehicles, forestry vehicles, airport vehicles, port vehicles, etc. The present application does not make specific limitations here.

[0055] For ease of understanding, the energy recovery control method provided by the present application will be specifically introduced below in combination with the drawings.

[0056] The embodiments of the present application provide an energy recovery control method, as shown in Figure 1 The energy recovery control method includes the following steps:

[0057] S101: In the process of energy recovery of the vehicle, it is judged whether the motor power generation energy meets a first condition, and the first condition represents that the energy recovery capability of the battery assembly is insufficient to recover the motor power generation energy.

[0058] Among them, 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: when decelerating or braking, the electric motor is converted into a power generation mode, converting the kinetic energy of the vehicle into electrical energy, which is stored in the battery.

[0059] The energy recovery control method provided by the embodiments of the present application can be applied to a vehicle, and in particular can be applied to an energy recovery system in the vehicle. In order to facilitate understanding, first, the various modules included in the energy recovery system in the vehicle will be introduced. Figure 2 The various modules included in the energy recovery system in the vehicle will be introduced.

[0060] As shown in Figure 2 The energy recovery system can include: a battery pack, a storage battery pack, a motor, a battery management system, an on-board charger (OBC), a DCDC controller, a drive controller, a vehicle controller, a high-voltage distribution box, and an energy storage assembly. The specific introduction is as follows:

[0061] Battery pack: also known as power battery pack, high-voltage power battery pack. Used for storing electrical energy and providing driving energy for electric vehicles, usually composed of multiple lithium ion cells in series and parallel, supporting high power output and long endurance.

[0062] Storage battery pack: low-voltage auxiliary battery (such as 12V lead-acid battery), supplies power to on-board low-voltage devices (such as lights, instruments), isolated from high-voltage system, ensures basic vehicle functions.

[0063] Motor: converts electrical energy into mechanical energy to drive the vehicle, or as a generator to recover energy during braking (such as permanent magnet synchronous motor), core components include stator, rotor and controller.

[0064] Battery management system (BMS): real-time monitoring of battery status, management of charge and discharge balance and safety protection, prolonging battery life and optimizing performance.

[0065] OBC: converts external alternating current to direct current to charge the power battery, supports different power levels and charging protocols (such as national standard / European standard), integrates safety isolation and intelligent control functions.

[0066] DCDC controller: reduces the voltage of high-voltage battery from DC to low voltage (such as 400V→12V), supplies power to storage battery and low-voltage system.

[0067] Drive Controller: controls the speed, torque, and energy recovery of the motor, converts DC power to three-phase AC power through an inverter, enabling precise driving and dynamic response (e.g., vector control).

[0068] Vehicle Controller: the "brain" of the vehicle, coordinates the power system (e.g., motor), energy distribution, driving mode, etc., based on sensor data to achieve optimal control and fault diagnosis.

[0069] High Voltage Distribution Box: distributes and manages high voltage circuits (e.g., battery → motor / OBC / air conditioner, etc.), with built-in relays, fuses, and overload / short circuit protection to ensure safe operation of the high voltage system.

[0070] Energy Storage Component: used to store part of the motor's discharge energy during energy recovery. In the embodiments of the present application, the energy storage component can be a film capacitor. Film capacitors can absorb high-frequency ripple, stabilize DC bus voltage, withstand high voltage, have low loss, and improve system efficiency and reliability.

[0071] The above modules can communicate with each other through local interconnect network (LIN) protocol or controller area network (CAN) protocol, etc., to realize information transmission and driving functions, etc.

[0072] In the embodiments of the present application, during energy recovery of the vehicle, the motor is converted to a generator mode, and the energy generated by the motor can be rectified to a unit capable of storing energy, such as a capacitor, through an inverter. The above-mentioned energy can be understood as electrical energy. The size of the motor's generated energy can be measured by the voltage output by the inverter to the capacitor.

[0073] On the other hand, during energy recovery of the vehicle, the energy recovery capability of the battery assembly is determined. The energy recovery capability represents the electrical energy that the battery assembly can currently recover, and can also be understood as the electrical energy that the battery assembly can currently consume.

[0074] In the embodiments of the present application, the energy recovery capability can be determined according to the battery state of the battery assembly. The battery state can include the voltage, temperature, and state of charge (SOC) of the battery. The SOC and voltage of the battery assembly are usually positively correlated, i.e., when the SOC is high, the voltage is usually also high.

[0075] It can be understood that when the SOC and voltage of the battery are high, the energy recovery capability of the battery assembly is poor when charging the battery assembly based on the energy generated by kinetic energy recovery, and the electrical energy that can be recovered is less. That is, the energy recovery capability is negatively correlated with the SOC and voltage of the battery.

[0076] In addition, the temperature of the battery can also affect the energy recovery capability. When the temperature is high, if the battery assembly is charged to a large extent based on the energy generated by kinetic energy recovery, the battery health can be affected. Therefore, when the temperature of the battery is high, the energy recovery capability of the battery assembly is also limited. That is, the energy recovery capability is negatively correlated with the temperature of the battery.

[0077] In some embodiments of the present application, the association between the energy recovery capability and the battery state can be determined in advance. For example, a mapping table of the energy recovery capability and the battery state is established in advance, and during the energy recovery process of the vehicle, the energy recovery capability is directly mapped according to the battery state. The battery state can include voltage, temperature and SOC.

[0078] Further, it can be determined whether the motor-generated energy meets a first condition. The first condition represents that the energy recovery capability of the battery assembly is insufficient to recover the motor discharge energy.

[0079] For example, if the energy recovery capability of the battery assembly represents that the current recoverable electric energy is M1, the motor-generated energy is M2, and if M1 is less than M2, it means that the battery assembly is insufficient to completely recover the motor discharge energy.

[0080] S102: In the case of meeting the first condition, 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 motor-generated energy to the battery assembly and the energy storage assembly.

[0081] Specifically, in the case of meeting the first condition, the battery assembly is insufficient to recover all the motor-generated energy. If the motor discharge energy is still transferred to the battery assembly through the circuit at this time, it is likely to affect the battery health and lead to poor energy recovery efficiency.

[0082] In the embodiments of the present application, an energy recovery circuit is integrated on the drive board. In the energy recovery stage of the vehicle, the motor discharge energy is transferred to the battery assembly and the energy storage assembly to charge the battery assembly, and part of the recovered energy is stored in the energy storage assembly. That is, the energy recovery circuit is used to transfer the motor-generated energy to the battery assembly and the energy storage assembly.

[0083] In addition, 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 assembly. The energy storage assembly can act as a buffer for battery charging to avoid affecting the battery health caused by charging the battery assembly with too much energy. If the energy recovery circuit outputs a low voltage, less energy can be stored in the energy storage assembly to ensure the efficiency of the battery assembly recovering electric energy. In addition, a super capacitor does not need to be used to increase the overall design cost, which has the advantages of economy, practicality and high efficiency.

[0084] In some embodiments of the application, the energy storage component can be a thin film capacitor. The thin film capacitor is a capacitor with plastic film as dielectric, which has the advantages of non-polarity, high insulation impedance, excellent frequency characteristics (wide frequency response) and small dielectric loss.

[0085] In some embodiments of the 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 motor-generated energy;

[0086] 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 charges the second inductor in the first loop; the first inductor, the coupling capacitor and the switch tube form a second loop, and the coupling capacitor charges the first inductor in the second loop;

[0087] 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 the first inductor charges the energy storage component through the diode in the third loop;

[0088] The control energy recovery circuit outputs a first charging voltage to the energy storage component, comprising:

[0089] The duty cycle of the switch tube is controlled to make the energy recovery circuit output a first charging voltage to the energy storage component.

[0090] Specifically, by setting the energy recovery circuit, the motor-generated energy is transmitted to the energy storage component, and the battery component is charged.

[0091] For ease of understanding, the circuits involved in the embodiments of the application are introduced below with reference to the accompanying drawings.

[0092] Referring to Figure 3 , M represents the motor, SW1-SW6 six switch tubes constitute an inverter, K1 is the switch tube between the bus voltage and the inverter. C1 is a thin film capacitor, which has the functions of filtering, energy storage, protecting power devices, etc. C3 is a capacitor in front of the inverter, which has the functions of energy storage and filtering. During the energy recovery stage, when the energy recovery circuit works, the capacitor C3 is the input capacitor of the energy recovery circuit. Because the input voltage range of the energy recovery circuit is wide, the energy recovery energy is not as large as the normal working demand of the motor, so this capacitor does not need to be as large as the thin film capacitor, and only needs to meet the normal working demand of the energy recovery circuit.

[0093] As Figure 3As shown, the input capacitor C3, the diode D1, the first inductor L1, the coupling capacitor C2, the switch K2, and the second inductor L2 form an energy recovery circuit. When the switch K2 is turned on, the input capacitor C3, the second inductor L2, and the switch K2 form a first loop, and the input capacitor C3 charges the second inductor L2 in the first loop; the first inductor L1, the coupling capacitor C2, and the switch K2 form a second loop, and the coupling capacitor C2 charges the first inductor L1 in the second loop.

[0094] When the switch 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, and the first inductor L1 charges the energy storage component through the diode D1 in the third loop.

[0095] Specifically, D1 is unidirectionally conductive and continues to flow, and blocks reverse current; the first inductor L1 acts as a secondary inductor and cooperates with the second inductor L2 (primary inductor) to transfer energy through the coupling capacitor; C2 is a coupling capacitor that is alternately charged and discharged when the switch K2 is turned on and turned off, thereby achieving energy coupling between the input and the output and blocking the direct current path between the input and the output, allowing the output voltage to be lower or higher than the input voltage; K2 is a switch that can adjust the output voltage of the energy recovery circuit by changing the conduction time (duty ratio) and control the energy transfer path from the input to the inductor and the coupling capacitor; L2 acts as a primary inductor that stores energy when the switch K2 is turned on and transfers energy to the output through the coupling capacitor and the diode when the switch is turned off.

[0096] The working principle of the above circuit is as follows: when the vehicle is normally driving, the switch K1 is turned on, and the bus voltage on the film capacitor C1 supplies the inverter to work and drive the motor. When the automobile is in a braking state, the switch K1 is turned off, and the motor generates energy that is first rectified to the capacitor C3 through the inverter, and then the voltage on the capacitor C3 is converted into a suitable voltage by the energy recovery circuit and recovered to the film capacitor.

[0097] As described above, the output voltage of the energy recovery circuit is adjustable. In the embodiment of the present application, under the condition of satisfying the first condition, the energy recovery circuit is controlled to charge the battery component, and the energy recovery circuit outputs a first energy charging voltage to the energy storage component. The first energy charging voltage can be a higher voltage, for example, higher than a first threshold.

[0098] Specifically, in the case that the battery component is insufficient to recover all the motor-generated energy, a higher energy charging voltage can be controlled to charge the film capacitor, so that more energy can be stored in the film capacitor, and the use of more energy to charge the battery component can be avoided to affect the battery health.

[0099] It can be understood that, since energy recovery is a stage, and charging the thin-film capacitor and the battery assembly based on the energy recovery circuit is also a process, the output charging voltage of the energy recovery circuit can also be dynamically changed. That is, the first charging voltage described above is not a fixed value, but can be a dynamically changed value, but needs to satisfy that the first charging voltage is high, for example, the first charging voltage is higher than the first threshold value.

[0100] For example, in the 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 the two are used as feedback voltages, and then the duty cycle of the switch tube K2 is dynamically adjusted to achieve the effect of dynamically adjusting the output voltage.

[0101] Referring to Figure 3 When the switch tube K2 is turned on, the first loop is C3-L2-K2, and the input coupling capacitor C3 charges the inductor L2; the second loop L1-C2-K2, and the coupling capacitor C2 charges the inductor L1. When the switch tube K2 is turned off, the first loop C3-L2-C2-D1-C1, the capacitor C3 and the inductor L2 charge the coupling capacitor C2 at the same time, and transfer energy to the output end; the second loop L1-D1-C1, the inductor L1 charges the thin-film capacitor C1 through the diode D1. Thus, by adjusting the duty cycle of the switch tube K2, the voltage boosting and voltage reducing of the energy recovery circuit can be achieved, and the control is flexible.

[0102] It can be understood that, Figure 3 The energy recovery circuit shown can be regarded as a single-ended primary inductor converter (SEPIC), which is a DCDC converter allowing the output voltage to be greater than, less than, or equal to the input voltage. Figure 3 The circuit structure shown is only an implementation manner of the embodiment of the present application, and 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 and make the output voltage greater than, less than, or equal to the input voltage can be used as the energy recovery circuit provided by the embodiment of the present application to realize the transmission of motor power generation energy to the battery assembly and the energy storage assembly.

[0103] 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.

[0104] Specifically, the battery assembly can include a power battery pack and a storage battery pack. In the embodiments of the present application, a first charging circuit for charging the power battery pack and a second charging circuit for charging the storage battery pack can be provided, and the first charging circuit and the second charging circuit are both connected to the energy recovery circuit. The first charging circuit includes the 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, and then part of the motor-generated energy is converted into the power battery pack. The second charging circuit includes the 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, and then part of the motor-generated energy is converted into the storage battery pack.

[0105] By using the energy recovery control method provided in the embodiments of the present application, in the process of energy recovery of the vehicle, it is determined whether the motor-generated energy meets a first condition, and the first condition represents that the energy recovery of the battery assembly is insufficient to recover the motor-generated energy. In the case of meeting the first condition, 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.

[0106] It can be seen that the energy recovery circuit is provided, and the energy recovery circuit is used to transmit the motor-generated energy to the battery assembly and the energy storage assembly. In the case that the energy recovery capability of the battery assembly is insufficient to recover the motor-generated energy, the energy recovery circuit is controlled to input a high voltage, so that more motor-generated energy is stored in the energy storage assembly. The energy storage assembly can serve as a buffer for battery charging, relieve the energy recovery conversion pressure, and avoid the impact on the battery health caused by directly charging the battery assembly with more energy. Moreover, the energy stored in the energy storage assembly is not wasted, and can be used to charge the battery assembly at other times, thereby significantly improving the overall energy recovery efficiency.

[0107] In some embodiments of the present application, the method further includes: in the case of not meeting the first condition, determining whether the motor-generated energy meets a second condition, and the second condition represents that the energy recovery capability of the storage battery pack is sufficient to recover the motor-generated energy. In the case of meeting the second condition, the energy recovery circuit is controlled to charge the storage battery pack, and the energy recovery circuit is controlled to output a second charging voltage to the energy storage assembly; wherein the second charging voltage is lower than the first charging voltage.

[0108] Specifically, if the energy recovery capability of the battery assembly is sufficient to recover the motor-generated energy, more energy does not need to be stored in the energy storage assembly, and therefore the energy recovery circuit can be controlled to output a second charging voltage to the energy storage assembly, and the second charging voltage is lower than the first charging voltage. Exemplarily, the second charging voltage is lower than a second threshold.

[0109] It can be understood that since the energy recovery is a stage, the charging of the film capacitor and the battery assembly based on the energy recovery circuit is also a process, therefore, the control of the output charging voltage of the energy recovery circuit can also be dynamically changed. That is, the above-mentioned second charging voltage is also not a fixed value, but can be a dynamically changed value, but needs to meet that the second charging voltage is at a low level, for example, the second charging voltage is lower than the second threshold value. The second threshold value can be pre-set.

[0110] For example, by adjusting the duty cycle of a specific light pipe in the SEPIC circuit, the SEPIC circuit outputs a lower voltage to the energy storage assembly.

[0111] Since the battery pack belongs to a low-voltage auxiliary battery, which supplies power to the low-voltage equipment on the vehicle, and the power battery pack belongs to a high-voltage battery, which provides driving energy for the vehicle, therefore, the energy recovery capability of the battery pack is usually lower than that of the power battery pack.

[0112] In the embodiments of the present application, in the case where the first condition is not met, in order to determine whether the current is suitable for charging the power battery pack, or suitable for charging the battery pack, or suitable for charging the power battery pack and the battery pack at the same time, it can be further determined whether the energy recovery capability of the battery pack is sufficient to recover the motor generated energy.

[0113] It can be understood that if the energy recovery capability of the battery pack is sufficient to recover the motor generated energy, it means that the current motor generated energy to be recovered is small, and it is not suitable to charge the power battery pack. Specifically, if the power battery pack is still charged, the above-mentioned first charging circuit needs to be controlled to be closed, that is, the on-board charger needs to be controlled to operate. When the motor generated energy to be recovered is small, it can lead to low efficiency of energy recovery by the first charging circuit.

[0114] Therefore, when it is determined that the energy recovery capability of the battery pack is sufficient to recover the motor generated energy, the energy recovery circuit can be controlled to only charge the battery pack. For example, only the above-mentioned second charging circuit is controlled to be closed, and based on the second charging circuit, a part of the motor generated energy is transmitted to the battery pack to charge the battery pack.

[0115] In some embodiments of the present application, the method further comprises: in the case where the second condition is not met, determining whether the motor generated energy meets a third condition, the third condition representing that the energy recovery capability of the power battery pack is sufficient to recover the motor generated energy. In the case where 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 assembly.

[0116] Specifically, based on the same reason as the above embodiment, if the energy recovery capability of the battery assembly is sufficient to recover the motor generated energy, more energy does not need to be stored in the energy storage assembly, and thus the energy recovery circuit can be controlled to output a second charging voltage lower than the second threshold to the energy storage assembly.

[0117] Specifically, by adjusting the duty cycle of a specific light pipe in the SEPIC circuit, the SEPIC circuit can be controlled to output a lower voltage to the energy storage assembly.

[0118] If the energy recovery capability of the power battery assembly is sufficient to recover the motor generated energy, it means that only the power battery assembly is currently charged, which can ensure a high energy recovery efficiency, and the storage battery assembly does not need to be charged.

[0119] In some embodiments of the present application, the method further comprises: in the case where the third condition is not met, controlling the energy recovery circuit to charge the power battery assembly and the storage battery assembly, and controlling the energy recovery circuit to output a second charging voltage to the energy storage assembly.

[0120] Specifically, based on the same reason as the above embodiment, if the energy recovery capability of the battery assembly is sufficient to recover the motor generated energy, more energy does not need to be stored in the energy storage assembly, and thus the energy recovery circuit can be controlled to output a second charging voltage lower than the second threshold to the energy storage assembly.

[0121] In addition, if the energy recovery capability of the power battery assembly is insufficient to recover the motor generated energy, it is currently appropriate to charge the circuit battery assembly and the storage battery assembly at the same time, so as to ensure a high energy recovery efficiency.

[0122] Specifically, the first charging circuit and the second charging circuit are controlled to be closed at the same time, a part of the motor generated energy is transmitted to the power battery assembly based on the first charging circuit to charge the power battery assembly, and a part of the motor generated energy is transmitted to the storage battery assembly based on the second charging circuit to charge the storage battery assembly.

[0123] For ease of understanding, the energy recovery control method provided by the embodiments of the present application will be further introduced in combination with Figure 4 The energy recovery control method provided by the embodiments of the present application will be further introduced in combination with

[0124] When the vehicle starts energy recovery, the vehicle controller receives the motor generated energy information and the battery state information (such as temperature, SOC, voltage) through communication, and then processes the information.

[0125] For example, the vehicle controller can be a microprocessor. Figure 4As shown, comprising the following steps:

[0126] S401: Calculate the motor generation energy according to the vehicle working condition.

[0127] S402: Calculate the consumable motor generation according to the state information of the battery assembly.

[0128] S403: Determine whether the battery pack and the storage battery can consume the motor generation, if not, execute S404; if yes, execute S405.

[0129] S404: Drive the energy recovery circuit to output high voltage, and the DCDC controller and the OBC controller work simultaneously to charge the storage battery and the battery pack.

[0130] S405: Determine whether the storage battery can consume the motor generation, if yes, execute S406; if not, execute S407.

[0131] S406: Drive the energy recovery circuit to output low voltage, and charge the storage battery through the DCDC controller.

[0132] S407: Determine whether the battery pack can consume the motor generation, if yes, execute S408; if not, execute S409.

[0133] S408: Drive the energy recovery circuit to output low voltage, and charge the battery pack through the OBC controller.

[0134] S409: Drive the energy recovery circuit to output high voltage, and the DCDC controller and the OBC controller work simultaneously to charge the storage battery and the battery pack.

[0135] It can be seen that the motor generation that can be consumed by the power battery pack and the storage battery pack in the battery assembly is compared with the actual motor generation, and then the energy recovery circuit is controlled to output high voltage or low voltage. In the case of outputting high voltage, more motor generation energy can be stored in the energy storage assembly, the energy storage assembly can serve as a buffer for battery charging, relieve the energy recovery conversion pressure, and avoid the impact on battery health caused by directly charging the battery assembly with more energy. Moreover, the energy stored in the energy storage assembly is not wasted, and it can also be used to charge the battery assembly at other times, thereby significantly improving the overall energy recovery efficiency.

[0136] In the case of outputting low voltage, according to the motor generation that can be consumed by the power battery pack and the storage battery pack, it is further determined whether the power battery pack is currently suitable for charging, the storage battery pack is currently suitable for charging, or the power battery pack and the storage battery pack are currently suitable for charging, to realize fine-grained differentiation, which helps to improve the overall energy recovery efficiency.

[0137] In some embodiments, as Figure 5As shown, the energy recovery control device can include: a first determination module 501, configured to determine whether the motor-generated energy meets a first condition in a process of energy recovery of the vehicle, the first condition representing that the energy recovery capability of the battery assembly is insufficient to recover the motor-generated energy; a first control module 502, configured 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 in a case where the first condition is met; and the energy recovery circuit is configured to transmit the motor-generated energy to the battery assembly and the energy storage assembly.

[0138] In a possible implementation, the battery assembly includes a power battery pack and a storage battery pack, and the device further includes:

[0139] a second determination module, configured to determine whether the motor-generated energy meets a second condition in a case where the first condition is not met, the second condition representing that the energy recovery capability of the storage battery pack is sufficient to recover the motor-generated energy;

[0140] a second control module, configured to control the energy recovery circuit to charge the storage battery pack and control the energy recovery circuit to output a second charging voltage to the energy storage assembly in a case where the second condition is met; and the second charging voltage is lower than the first charging voltage.

[0141] In a possible implementation, the device further includes:

[0142] a third determination module, configured to determine whether the motor-generated energy meets a third condition in a case where the second condition is not met, the third condition representing that the energy recovery capability of the power battery pack is sufficient to recover the motor-generated energy;

[0143] a third control module, configured 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 assembly in a case where the third condition is met.

[0144] In a possible implementation, the device further includes:

[0145] a fourth control module, configured to control the energy recovery circuit to charge the power battery pack and the storage battery pack and control the energy recovery circuit to output the second charging voltage to the energy storage assembly in a case where the third condition is not met.

[0146] In a possible implementation, the energy recovery capability of the battery assembly is determined based on a battery state of the battery assembly, and the energy recovery capability represents an upper limit of energy supported by the battery assembly for recovery; and the battery state includes at least one of a temperature, a voltage, and a battery remaining capacity state.

[0147] In a possible implementation, the energy storage assembly is a thin-film capacitor.

[0148] The embodiments of the present application also provide an electronic device, such as Figure 6 As shown in the figure, the electronic device includes but is not limited to a processor 601 and a memory 602.

[0149] The memory 602 is configured to store executable instructions of the processor 601. It can be understood that the processor 601 is configured to execute the instructions to implement the energy recovery control method in the above embodiments.

[0150] It should be noted that those skilled in the art can understand that the structure of the electronic device shown in the figure does not constitute a limitation to the electronic device, and the electronic device can include more or fewer components than those shown in the figure, or combine some components, or different component arrangements. Figure 6 Figure 6 It should be noted that those skilled in the art can understand that the structure of the electronic device shown in the figure does not constitute a limitation to the electronic device, and the electronic device can include more or fewer components than those shown in the figure, or combine some components, or different component arrangements.

[0151] The processor 601 is the control center of the electronic device, connects all parts of the electronic device through various interfaces and lines, executes software programs and / or modules stored in the memory 602 and data stored in the memory 602, processes various functions and data of the electronic device, and thus monitors the whole electronic device. The processor 601 can include one or more processing units. Optionally, the processor 601 can integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication. It can be understood that the modem processor can also not be integrated into the processor 601.

[0152] The memory 602 can be used to store software programs and various data. The memory 602 can mainly include a program storage area and a data storage area, wherein the program storage area can store the operating system, application programs (such as determination units, processing units, etc.) required by at least one function module, etc. In addition, the memory 602 can include a high-speed random access memory, and can also include a non-volatile memory, for example, at least one magnetic disk storage device, a flash memory device, or other volatile solid-state memory device.

[0153] In the exemplary embodiments, a computer readable storage medium including instructions is also provided, for example, the memory 602 including instructions, and the instructions can be executed by the processor 601 of the electronic device to implement the method in the above embodiments.

[0154] ​Optionally, the computer readable storage medium can be a non-transitory computer readable storage medium, for example, the non-transitory computer readable storage medium can 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, and an optical data storage device, etc.

[0155] In the example embodiments, the embodiments of the present application also provide a computer program product comprising one or more instructions executable by the processor 601 of the electronic device to complete the method in the above embodiments.

[0156] It should be noted that the instructions in the above computer readable storage medium or the one or more instructions in the computer program product are executed by the processor of the electronic device to realize each process of the above method embodiments, and the same technical effects as the above method can be achieved. To avoid repetition, it will not be described here.

[0157] Through the description of the above embodiments, those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above division of each functional module is taken as an example for illustration. In actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete the above-described full classification or part of the function.

[0158] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the above-described device embodiments are only illustrative, for example, the division of modules or units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another device, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be through some interface, indirect coupling or communication connection between devices or units, which can be electrical, mechanical or other forms.

[0159] The units described as separate components can or can not be physically separate, and the components shown as units can be one physical unit or multiple physical units, that is, can be located in one place, or can be distributed to multiple different places. According to actual needs, part or all of the units can be selected to achieve the purpose of the present embodiment.

[0160] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0161] When the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application are essentially or say the part that contributes to the prior art or the whole classification or part of the technical solutions can be embodied in the form of a software product, which is stored in a storage medium and includes a plurality of instructions to make a device (which can be a single-chip microcomputer, a chip, etc.) or a processor execute the whole classification or part of the steps of the method of each embodiment of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk and various storage program codes.

[0162] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any change or replacement within the technical scope disclosed in the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An energy recovery control method, characterized in that, The method includes: During the energy recovery process of the vehicle, it is determined whether the energy generated by the motor meets the first condition, which indicates that the energy recovery capacity of the battery pack 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 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; the battery assembly includes a power battery pack and a storage battery pack. If the first condition is not met, it is determined whether the energy generated by the motor meets the second condition, wherein 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 through the second charging circuit, 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; the second charging circuit includes a battery pack, a DC-DC controller, and a high-voltage distribution box, and the input terminal of the DC-DC controller is connected to the output voltage of the energy recovery circuit through the high-voltage distribution box; If the second condition is not met, it is determined whether the energy generated by the motor meets the 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 through the first charging circuit, and the energy recovery circuit is controlled to output the second charging voltage to the energy storage component; the first charging circuit includes a power battery pack, an on-board charger, and a high-voltage distribution box, and the input terminal of the on-board charger is connected to the output voltage of the energy recovery circuit through the high-voltage distribution box; If 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. The energy recovery circuit includes: an input capacitor, a coupling capacitor, a first inductor, a second inductor, a switching transistor, and a diode; wherein the input capacitor is used to store the energy generated by the motor. When the switching transistor is turned on, the input capacitor, the second inductor, and the switching transistor form a first circuit, in which the input capacitor charges the second inductor; the first inductor, the coupling capacitor, and the switching transistor form a second circuit, in which the coupling capacitor charges the first inductor. When the switching transistor is turned off, the input capacitor, the second inductor, the coupling capacitor, the diode, and the energy storage component form a third circuit, in which the first inductor charges the energy storage component through the diode in the third circuit. The control of the energy recovery circuit to output a first charging voltage to the energy storage component includes: The duty cycle of the switching transistor is controlled so that the energy recovery circuit outputs the first charging voltage to the energy storage component.

2. The method according to claim 1, characterized in that, The energy recovery capability of the battery module is determined based on the battery state of the battery module, and the energy recovery capability characterizes the upper limit of energy that the battery module can recover; the battery state includes at least one of temperature, voltage and remaining battery charge state.

3. The method according to claim 1, characterized in that, The energy storage component is a thin-film capacitor.

4. An energy recovery control device, characterized in that, The device includes: The first judgment module is used to determine whether the energy generated by the motor meets the first condition during the energy recovery process of the vehicle. The first condition indicates that the energy recovery capacity of the battery pack is insufficient to recover the energy generated by the motor. A first control module is configured to, under the condition of satisfying the first condition, 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; the energy recovery circuit is configured to transfer the energy generated by the motor to the battery assembly and the energy storage assembly; the battery assembly includes a power battery pack and a storage battery pack; The second judgment module is used to determine whether the energy generated by the motor meets the second condition if the first condition is not met. 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 through the second charging circuit when the second condition is met, and to control 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; the second charging circuit includes a battery pack, a DC-DC controller, and a high-voltage distribution box, and the input terminal of the DC-DC controller is connected to the output voltage of the energy recovery circuit through the high-voltage distribution box; The third judgment module is used to determine whether the energy generated by the motor meets the third condition if the second condition is not met. 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 through the first charging circuit when the third condition is met, and to control the energy recovery circuit to output the second charging voltage to the energy storage component; the first charging circuit includes a power battery pack, an on-board charger, and a high-voltage distribution box, and the input terminal of the on-board charger is connected to the output voltage of the energy recovery circuit through the high-voltage distribution box; 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 the second charging voltage to the energy storage component. The energy recovery circuit includes: an input capacitor, a coupling capacitor, a first inductor, a second inductor, a switching transistor, and a diode; wherein the input capacitor is used to store the energy generated by the motor. When the switching transistor is turned on, the input capacitor, the second inductor, and the switching transistor form a first circuit, in which the input capacitor charges the second inductor; the first inductor, the coupling capacitor, and the switching transistor form a second circuit, in which the coupling capacitor charges the first inductor. When the switching transistor is turned off, the input capacitor, the second inductor, the coupling capacitor, the diode, and the energy storage component form a third circuit, in which the first inductor charges the energy storage component through the diode in the third circuit. The control of the energy recovery circuit to output a first charging voltage to the energy storage component includes: The duty cycle of the switching transistor is controlled so that the energy recovery circuit outputs the first charging voltage to the energy storage component.

5. A vehicle, characterized in that, Includes the energy recovery control device as described in claim 4.

6. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute the instructions to implement the method as described in any one of claims 1-3.

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