Energy processing equipment and vehicles

Abstract

An energy processing device and a vehicle. The device includes a first battery, a second battery, at least one stage of a first bridge arm, at least one stage of a first inductor, and a controller, wherein an anode of the second battery is connected to a first end of each stage of the first bridge arm, a cathode of the second battery is connected to a second end of each stage of the first bridge arm and to a cathode of the first battery, respectively, a first end of each stage of the first inductor is connected to a midpoint of a corresponding first bridge arm, and a second end of each stage of the first inductor is connected to an anode of the first battery, and a controller is connected to each stage of the first bridge arm and is used to control the first bridge arm in a first preset state, whereby the first battery and the second battery are alternately charged and discharged, thereby realizing self-heating of the first battery and the second battery.

Description

Technical Field

[0001] Cross-Reference to Related Applications The present disclosure claims priority to Chinese Patent Application No. 202211493478.3, entitled "ENERGY PROCESSING APPARATUS AND VEHICLE", filed on November 25, 2022. The entire content of the above-referenced application is incorporated herein by reference.

[0002] The present disclosure relates to the technical field of vehicles, and in particular, to an energy processing apparatus and a vehicle.

Background Art

[0003] Currently, with the rapid development of electric vehicles, their application scenarios are becoming increasingly extensive, which requires power batteries to adapt to various temperature changes. However, the performance of power batteries installed in electric vehicles deteriorates significantly during charging and discharging in low-temperature environments, thus limiting the capability of the driving system or charging system in low-temperature environments and significantly reducing user experience.

[0004] In order to reduce the limitation of low-temperature environments on power batteries, several heating solutions for power batteries have been proposed. Currently, heating of power batteries is mainly achieved by external heaters, but the high-voltage system of the entire vehicle requires additional power distribution to the external heater, and water or air ducts, pipelines, low-voltage systems, etc. are also required, which results in an increase in the total cost of the entire vehicle. Furthermore, since water ducts and pipelines are generally long, heat transfer loss is large, which results in reduced heating efficiency of the battery.

Summary of Invention

[0005] In order to overcome the problems existing in the related art, the present disclosure provides an energy processing apparatus and a vehicle.

[0006] To achieve the above objective, according to a first aspect, the present disclosure provides an energy processing device comprising a first battery, a second battery, at least one stage of a first bridge arm, at least one stage of a first inductor, and a controller. The anode of the second battery is connected to a first end of each stage of the first bridge arm. The cathode of the second battery is separately connected to a second end of each stage of the first bridge arm and to the cathode of the first battery. The first end of each stage of the first inductor is connected to the midpoint of the corresponding first bridge arm. The second end of each stage of the first inductor is connected to the anode of the first battery. A controller is connected to each stage of the first bridge arm. The controller is configured to control the first bridge arm in a first preset state to alternately charge and discharge the first battery and the second battery, thereby achieving self-heating of the first battery and the second battery.

[0007] In one embodiment, the controller is configured to control the first bridge arm in the first half-cycle of the control cycle to discharge the first battery and charge the second battery, and to control the first bridge arm in the second half-cycle of the control cycle to charge the first battery and discharge the second battery.

[0008] In one embodiment, the controller is configured to discharge the first battery and store energy in the first inductor by controlling the lower switch group of at least one stage of the first bridge arm to turn on and the upper switch group of at least one stage of the first bridge arm to turn off during a first time frame of the first half-cycle, and to discharge the first battery and release the energy stored in the first inductor and charge the second battery by controlling the upper switch group of at least one stage of the first bridge arm to turn on and the lower switch group of at least one stage of the first bridge arm to turn off during a second time frame of the first half-cycle.

[0009] In one embodiment, the controller is configured to charge the first battery, discharge the second battery, and store energy in the first inductor by controlling the upper switch group of at least one stage of the first bridge arm to turn on and the lower switch group of at least one stage of the first bridge arm to turn off during a first time frame of a second half-cycle, and to charge the first battery and release the energy stored in the first inductor by controlling the lower switch group of at least one stage of the first bridge arm to turn on and the upper switch group of at least one stage of the first bridge arm to turn off during a second time frame of a second half-cycle.

[0010] In one embodiment, the bridge arm of the motor controller is reused as the first bridge arm, and the motor coil is reused as the first inductor.

[0011] In one embodiment, the device further includes an energy transmission circuit located between a first battery and a second battery. The energy transmission circuit is connected to a controller. The energy transmission circuit is configured to achieve energy transfer between the first battery and the second battery.

[0012] In one embodiment, the energy transfer circuit includes at least one stage of a second bridge arm, wherein the first end of each stage of the second bridge arm is connected to the anode of a second battery, and the second end of each stage of the second bridge arm is separately connected to the cathode of a second battery and to the cathode of a first battery; and at least one stage of a second inductor, wherein the first end of each stage of the second inductor is connected to the midpoint of the corresponding second bridge arm, and the second end of each stage of the second inductor is connected to the anode of a first battery. A controller is connected to each stage of the second bridge arm. The controller is further configured to control the second bridge arm in a second preset state to alternately charge and discharge the first and second batteries and achieve self-heating of the first and second batteries.

[0013] In one embodiment, the controller is configured to control the second bridge arm in the first half-cycle of the control cycle to discharge the first battery and charge the second battery, and to control the second bridge arm in the second half-cycle of the control cycle to charge the first battery and discharge the second battery.

[0014] In one embodiment, the energy transfer circuit includes at least one stage of a second bridge arm, wherein the first end of each stage of the second bridge arm is connected to the anode of a first battery, and the second end of each stage of the second bridge arm is separately connected to the cathode of a first battery and the cathode of a second battery; and at least one stage of a second inductor, wherein the first end of each stage of the second inductor is connected to the midpoint of the corresponding second bridge arm, and the second end of each stage of the second inductor is connected to the anode of a second battery. A controller is connected to each stage of the second bridge arm. The controller is further configured to control the second bridge arm in a second preset state to alternately charge and discharge the first and second batteries to achieve self-heating of the first and second batteries.

[0015] In one embodiment, the controller is configured to control the second bridge arm in the first half-cycle of the control cycle to charge the first battery and discharge the second battery, and to control the second bridge arm in the second half-cycle of the control cycle to discharge the first battery and charge the second battery.

[0016] In one embodiment, the controller is configured to control the second bridge arm in the first half-cycle of the control cycle to discharge the first battery and charge the second battery, and to control the second bridge arm in the second half-cycle of the control cycle to charge the first battery and discharge the second battery.

[0017] In one embodiment, the device further includes a DC charging port, a switching circuit in which a first end of the switching circuit is connected to the anode of the DC charging port and a second end of the switching circuit is selectively connected to the anode of a first battery and the anode of a second battery, and a switching device in which a first end of the switching device is connected to each stage of a first inductor and a second end of the switching device is connected to the anode of a first battery.

[0018] In one embodiment, the controller is connected separately to the switching circuit and the switching device. The controller is further configured to charge the first battery by controlling the switching circuit to connect to the anode of the first battery and by controlling the switching device to turn off in a first mode, and to power the second battery by controlling the second bridge arm.

[0019] In one embodiment, the controller is connected separately to the switching circuit and the switching device. In a second mode, the controller is further configured to charge the second battery by controlling the switching circuit to connect to the anode of the second battery and by controlling the switching device to turn off, and to control the second bridge arm to supply power to the first battery.

[0020] In one embodiment, the apparatus is

[0021] The present invention further includes a switching device. The first end of the switching device is connected to each stage of the first inductor. The second end of the switching device is connected to the anode of the first battery.

[0022] In one embodiment, the first battery is an energy-type battery, and the second battery is a power-type battery. The charging and discharging speeds of the power-type battery are greater than those of the energy-type battery.

[0023] In one embodiment, the controller is further configured to control the motor controller to store braking feedback energy in a second battery and / or to control the motor controller and a second bridge arm to store braking feedback energy in a first battery.

[0024] According to a second aspect, the Disclosure provides a vehicle including an energy processing device according to a first aspect of the Disclosure.

[0025] In the above technical solution, the energy processing device includes a first battery, a second battery, at least one stage of a first bridge arm, at least one stage of a first inductor, and a controller. The anode of the second battery is connected to the first end of each stage of the first bridge arm. The cathode of the second battery is separately connected to the second end of each stage of the first bridge arm and to the cathode of the first battery. The first end of each stage of the first inductor is connected to the midpoint of the corresponding first bridge arm. The second end of each stage of the first inductor is connected to the anode of the first battery. The controller is connected to each stage of the first bridge arm. The controller is configured to control the first bridge arm in a first preset state to alternately charge and discharge the first and second batteries and achieve self-heating of the first and second batteries. In this way, the first and second batteries can be alternately charged and discharged by controlling the first bridge arm in a first preset state, thereby achieving self-heating of the first and second batteries, better maintaining battery temperature, improving the electrolyte activity and electrochemical reaction rate of the lithium-ion batteries, and ensuring the driving capability of the electric vehicle drive system. Furthermore, the battery self-heating energy loss is low, heat is transferred uniformly, and heating efficiency is high. In addition, the first and second batteries can cooperate with each other and are redundant, so even if one of the batteries fails, not all loads on the vehicle will stop operating, thus improving the power stability of the vehicle.

[0026] Other features and benefits of this disclosure are described in detail in the following detailed description section.

[0027] The accompanying drawings are intended to provide a more detailed understanding of this disclosure and constitute part of this specification. The accompanying drawings and the specific implementations described below are used together to illustrate this disclosure and do not constitute any limitation to this disclosure. [Brief explanation of the drawing]

[0028] [Figure 1] It is a block diagram of an energy processing apparatus according to an exemplary embodiment. [Figure 2] It is a circuit topology diagram of an energy processing apparatus according to an exemplary embodiment. [Figure 3A] It is an operation principle diagram for achieving self-heating of a first battery and a second battery by using the energy processing apparatus in Fig. 2 in a first preset state according to an exemplary embodiment. [Figure 3B] It is an operation principle diagram for achieving self-heating of a first battery and a second battery by using the energy processing apparatus in Fig. 2 in a first preset state according to an exemplary embodiment. [Figure 3C] It is an operation principle diagram for achieving self-heating of a first battery and a second battery by using the energy processing apparatus in Fig. 2 in a first preset state according to an exemplary embodiment. [Figure 3D] It is an operation principle diagram for achieving self-heating of a first battery and a second battery by using the energy processing apparatus in Fig. 2 in a first preset state according to an exemplary embodiment. [Figure 4] It is a block diagram of an energy processing apparatus according to another exemplary embodiment. [Figure 5A] It is a circuit topology diagram of an energy processing apparatus according to another exemplary embodiment. [Figure 5B] It is a circuit topology diagram of an energy processing apparatus according to another exemplary embodiment. [Figure 6A] It is an operation principle diagram for achieving self-heating of a first battery and a second battery by using the energy processing apparatus in Fig. 5A in a second preset state according to an exemplary embodiment. [Figure 6B] It is an operation principle diagram for achieving self-heating of a first battery and a second battery by using the energy processing apparatus in Fig. 5A in a second preset state according to an exemplary embodiment. [Figure 6C]This is a diagram illustrating the operating principle by which the self-heating of the first and second batteries is achieved by using the energy processing device shown in Figure 5A in a second preset state according to an exemplary embodiment. [Figure 6D] This is a diagram illustrating the operating principle by which the self-heating of the first and second batteries is achieved by using the energy processing device shown in Figure 5A in a second preset state according to an exemplary embodiment. [Figure 7A] This is a diagram illustrating the operating principle of achieving self-heating of the first and second batteries by using the energy processing device shown in Figure 5B in a second preset state, according to an exemplary embodiment. [Figure 7B] This is a diagram illustrating the operating principle of achieving self-heating of the first and second batteries by using the energy processing device shown in Figure 5B in a second preset state, according to an exemplary embodiment. [Figure 7C] This is a diagram illustrating the operating principle of achieving self-heating of the first and second batteries by using the energy processing device shown in Figure 5B in a second preset state, according to an exemplary embodiment. [Figure 7D] This is a diagram illustrating the operating principle of achieving self-heating of the first and second batteries by using the energy processing device shown in Figure 5B in a second preset state, according to an exemplary embodiment. [Figure 8] This is a block diagram of an energy processing device according to another exemplary embodiment. [Figure 9] This is a circuit topology diagram of an energy processing device according to another exemplary embodiment. [Figure 10A] This is a diagram illustrating the operating principle of supplying power directly to a high-voltage load by using the second battery in the energy processing device shown in Figure 9 in a third preset state, according to an exemplary embodiment. [Figure 10B] This is a diagram illustrating the operating principle of charging the first battery by using the second battery in the energy processing device shown in Figure 9 in a third preset state, according to an exemplary embodiment. [Figure 11A]This is a diagram illustrating the operating principle of supplying power to a high-voltage load through an energy transfer circuit by using the first battery in the energy processing device of Figure 9 in a fourth preset state, according to an exemplary embodiment. [Figure 11B] This is a diagram illustrating the operating principle of charging the second battery through an energy transfer circuit by using the first battery in the energy processing device of Figure 9 in a fourth preset state, according to an exemplary embodiment. [Figure 12A] This is a diagram illustrating the operating principle of feeding back braking energy to the second battery by using the energy processing device shown in Figure 9 in a sixth preset state according to an exemplary embodiment. [Figure 12B] This is a diagram illustrating the operating principle of feeding back braking energy to the first battery by using the energy processing device shown in Figure 9 in a sixth preset state according to an exemplary embodiment. [Figure 13A] This is a circuit topology diagram of an energy processing device according to another exemplary embodiment. [Figure 13B] This is a circuit topology diagram of an energy processing device according to another exemplary embodiment. [Figure 14A] This is a diagram illustrating the operating principle of charging a first battery and simultaneously supplying power to a second battery through a second bridge arm by using the energy processing device of the first mode shown in Figure 13A, according to an exemplary embodiment. [Figure 14B] This is a diagram illustrating the operating principle of charging a first battery and simultaneously supplying power to a second battery through a second bridge arm by using the energy processing device of the first mode shown in Figure 13A, according to an exemplary embodiment. [Figure 14C] This is a diagram illustrating the operating principle of charging a first battery and simultaneously supplying power to a second battery through a second bridge arm by using the energy processing device of the first mode shown in Figure 13A, according to an exemplary embodiment. [Figure 15A]This is a diagram illustrating the operating principle of charging a first battery and simultaneously supplying power to a second battery through a second bridge arm by using the energy processing device of the first mode shown in Figure 13B, according to an exemplary embodiment. [Figure 15B] This is a diagram illustrating the operating principle of charging a first battery and simultaneously supplying power to a second battery through a second bridge arm by using the energy processing device of the first mode shown in Figure 13B, according to an exemplary embodiment. [Figure 16A] This is a diagram illustrating the operating principle of charging a second battery and simultaneously supplying power to the first battery through a second bridge arm by using the energy processing device of the second mode shown in Figure 13A, according to an exemplary embodiment. [Figure 16B] This is a diagram illustrating the operating principle of charging a second battery and simultaneously supplying power to the first battery through a second bridge arm by using the energy processing device of the second mode shown in Figure 13A, according to an exemplary embodiment. [Figure 17A] This is a diagram illustrating the operating principle of charging a second battery and simultaneously supplying power to the first battery through a second bridge arm by using the energy processing device of the second mode shown in Figure 13B, according to an exemplary embodiment. [Figure 17B] This is a diagram illustrating the operating principle of charging a second battery and simultaneously supplying power to the first battery through a second bridge arm by using the energy processing device of the second mode shown in Figure 13B, according to an exemplary embodiment. [Figure 17C] This is a diagram illustrating the operating principle of charging a second battery and simultaneously supplying power to the first battery through a second bridge arm by using the energy processing device of the second mode shown in Figure 13B, according to an exemplary embodiment. [Modes for carrying out the invention]

[0029] Specific implementations of this disclosure are described in detail below with reference to the attached drawings. It should be understood that the specific implementations described herein are used solely for the purpose of illustrating and clarifying this disclosure and are not intended to limit it.

[0030] Please understand that each operation to obtain signals, information, or data in this disclosure will be carried out in accordance with the applicable data protection regulations and policies of the country in which it is located, as well as the authority permitted by the corresponding device owner.

[0031] This disclosure provides an energy processing device. Referring to Figure 1, the energy processing device may include a first battery 1, a second battery 2, at least one phase of a first bridge arm 3, at least one phase of a first inductor 4, and a controller 5. The number of first bridge arms 3 is the same as the number of first inductors 4.

[0032] The anode of the second battery 2 is connected to the first end of each stage of the first bridge arm 3. The cathode of the second battery 2 is separately connected to the second end of each stage of the first bridge arm 3 and to the cathode of the first battery 1. The first end of each stage of the first inductor 4 is connected to the midpoint of the corresponding first bridge arm 3. The second end of each stage of the first inductor 4 is connected to the anode of the first battery 1. A controller 5 is connected to each stage of the first bridge arm 3 and is configured to control the first bridge arm 3 in a first preset state to alternately charge and discharge the first battery 1 and the second battery 2 (for example, charge and discharge periodically) to achieve self-heating of the first battery 1 and the second battery 2, i.e., to achieve self-heating of the first battery 1 and the second battery 2 through the first bridge arm 3.

[0033] In this disclosure, the first preset state is a state in which self-heating of the first battery 1 and the second battery 2 is achieved through the first bridge arm 3. The above-mentioned periodic charging and discharging refers to switching between charging and discharging at a constant frequency. Through the periodic charging and discharging of the first battery 1 and the second battery 2, the first battery 1 and the second battery 2 can generate heat, and thus achieve self-heating of the first battery 1 and the second battery 2.

[0034] Figure 1 illustrates an energy processing device that includes a first bridge arm 3 and a first inductor 4, but it should be understood by those skilled in the art that the number of bridge arms and inductors in Figure 1 are merely illustrative.

[0035] In the above technical solution, the energy processing device includes a first battery, a second battery, at least one stage of a first bridge arm, at least one stage of a first inductor, and a controller. The anode of the second battery is connected to the first end of each stage of the first bridge arm. The cathode of the second battery is separately connected to the second end of each stage of the first bridge arm and to the cathode of the first battery. The first end of each stage of the first inductor is connected to the midpoint of the corresponding first bridge arm. The second end of each stage of the first inductor is connected to the anode of the first battery. The controller is connected to each stage of the first bridge arm. The controller is configured to control the first bridge arm in a first preset state to alternately charge and discharge the first and second batteries and achieve self-heating of the first and second batteries. In this way, the first and second batteries can be alternately charged and discharged by controlling the first bridge arm in a first preset state, thereby achieving self-heating of the first and second batteries, better maintaining battery temperature, improving the electrolyte activity and electrochemical reaction rate of the lithium-ion batteries, and ensuring the driving capability of the electric vehicle drive system. Furthermore, the battery self-heating energy loss is low, heat is transferred uniformly, and heating efficiency is high. In addition, the first and second batteries can cooperate with each other and are redundant, so even if one of the batteries fails, not all loads on the vehicle will stop operating, thus improving the power stability of the vehicle.

[0036] Furthermore, the types of the first battery 1 and the second battery 2 mentioned above may be the same. For example, both may be energy batteries, or both may be power batteries. Energy batteries have a relatively large storage capacity and can therefore store a considerable amount of energy. Power batteries have a high power density and can supply strong power output instantaneously; that is, power batteries can release a large amount of current instantaneously. In addition, the charging and discharging speeds of power batteries are greater than those of energy batteries.

[0037] Indeed, the types of the first battery 1 and the second battery 2 may be different; that is, the first battery 1 may be either an energy-type battery or a power-type battery, while the second battery 2 may be either an energy-type battery or a power-type battery. In this way, the advantages of both power-type and energy-type batteries can be utilized simultaneously, thus not only meeting the instantaneous high-power electricity demand of the load to guarantee the vehicle's power performance, but also achieving an ultra-long mile range.

[0038] For example, the first battery 1 is an energy-type battery, and the second battery 2 is a power-type battery.

[0039] For further illustrative purposes, the first battery 1 is a power-type battery, and the second battery 2 is an energy-type battery.

[0040] Referring to Figure 2, for N≧1, the energy processing device includes N stages of the first bridge arm 3 and N stages of the first inductor 4.

[0041] The anode 2 of the second battery is connected to the first bus terminal of the N stages of the first bridge arm 3. The cathode of the second battery 2 is separately connected to the second bus terminal of the N stages of the first bridge arm 3 and to the cathode of the first battery 1. The first ends of the N stages of the first inductor 4 are correspondingly connected one-to-one to the midpoints of the N stages of the first bridge arm 3. The second ends of the N stages of the first inductor 4 are connected together to form a neutral point. The neutral point is connected to the anode of the first battery 1.

[0042] In this case, the controller 5 (not shown in Figure 2) is configured to control at least one stage of the first bridge arm 3 in a first preset state to alternately charge and discharge the first battery 1 and the second battery 2, thereby achieving self-heating of the first battery 1 and the second battery 2. The first target inductor is an inductor consisting of N stages of the first inductor 4 connected to at least one stage of the first bridge arm 3.

[0043] In one embodiment, the controller 5 is configured to control N stages of the first bridge arm 3 in a first preset state to alternately charge and discharge the first battery 1 and the second battery 2, thereby achieving self-heating of the first battery 1 and the second battery 2. In this way, the N stages of the first bridge arm 3 and the N stages of the first inductor 4 function simultaneously, thus maximizing the heating output and improving the self-heating effect of the first and second batteries.

[0044] In one embodiment, the N stages of the first inductor 4 are motor coils (e.g., coils of a drive motor), and the N stages of the first bridge arm 3 are a motor controller. That is, the bridge arm of the motor controller is reused as the first bridge arm 3, and the motor coil is reused as the first inductor 4. In this way, existing motor coils and motor controllers on the vehicle are reused and thus achieve different functions as needed. For example, when the first battery 1 and the second battery 2 need to be self-heated, the N stages of the first inductor 4 and the N stages of the first bridge arm 3 can be applied to various self-heating processes described herein, and when the vehicle needs to be driven, the N stages of the first inductor 4 and the N stages of the first bridge arm 3 can be switched to control the first bridge arm 3, enabling the motor corresponding to the N stages of the first inductor 4 to output power and thus drive the vehicle. Indeed, through the N stages of the first inductor 4 and the N stages of the first bridge arm 3, self-heating and vehicle drive can also be achieved synchronously. In this way, by reusing the vehicle motor coil and motor controller, different functions can be achieved as needed, and vehicle costs can be reduced.

[0045] Figure 2 provides an example using N=3, but it should be understood by those skilled in the art that the number of bridge arms and inductors in Figure 2 are merely illustrative.

[0046] The following is a detailed description of a specific implementation in which the first bridge arm 3 is controlled in a first preset state to alternately charge and discharge the first battery 1 and the second battery 2.

[0047] In one implementation, the controller 5 is configured to control the first bridge arm 3 in the first half-cycle of the control cycle to discharge the first battery 1 and charge the second battery 2, and to control the first bridge arm 3 in the second half-cycle of the control cycle to charge the first battery 1 and discharge the second battery 2.

[0048] Specifically, the controller 5 controls the first battery 1 to discharge and store energy in the first inductor 4 by turning on the lower switch group of at least one stage of the first bridge arm 3 and turning off the upper switch group of at least one stage of the first bridge arm 3 during the first time frame of the first half-cycle, and then controls the first battery 1 to discharge and release the energy stored in the first inductor 4 during the second time frame of the first half-cycle by turning on the upper switch group of at least one stage of the first bridge arm 3 and turning off the lower switch group of at least one stage of the first bridge arm 3 during the second time frame of the first half-cycle, and then charges the second battery 2.

[0049] In the first time frame of the second half-cycle, the system is configured to turn on the upper switch group of at least one stage of the first bridge arm 3 and turn off the lower switch group of at least one stage of the first bridge arm 3, thereby charging the first battery 1, discharging the second battery 2, and storing energy in the first inductor 4. In the second time frame of the second half-cycle, the system is configured to turn on the lower switch group of at least one stage of the first bridge arm 3 and turn off the upper switch group of at least one stage of the first bridge arm 3, thereby charging the first battery 1 and releasing the energy stored in the first inductor 4.

[0050] The operating principle for heating the first battery 1 and the second battery 2 by using the energy processing device shown in Figure 2 in the first preset state will be explained in detail below with reference to Figures 3A to 3D.

[0051] In Figure 3A (i.e., in the first time frame of the first half-cycle), the controller 5 controls the upper switch groups of N stages of the first bridge arm 3 to be turned off and at least one switch transistor of the lower switch groups of N stages of the first bridge arm 3 to be turned on, so that current flows from the anode of the first battery 1, sequentially through the N stages of inductors of the first inductor 4 connected to the turned-on lower switch transistors, and through the N stages of turned-on lower switch transistors of the first bridge arm 3, and then back to the cathode of the first battery 1. In this way, the controller 5 can achieve the effect of the first battery 1 charging (storing energy) the N stages of inductors of the first inductor 4 connected to the turned-on lower switch transistors. Furthermore, by controlling the number of turned-on lower switch transistors and their duty cycles, the magnitude of the charging current can be controlled, and therefore the magnitude of the charging power can be controlled.

[0052] Next, in Figure 3B (i.e., in the second time frame of the first half-cycle), the controller 5 controls the lower switch groups of the N stages of the first bridge arm 3 to be turned off and at least one switch transistor of the upper switch groups of the N stages of the first bridge arm 3 to be turned on, so that current flows from the first battery 1, sequentially through the N stages of inductors of the first inductor 4 connected to the turned-on upper switch transistors, the N stages of the turned-on upper switch transistors of the first bridge arm 3, the anode of the second battery 2, and the cathode of the second battery 2, and then back to the first battery 1. In this way, the energy in the first battery 1 and the N stages of the first inductor 4 can be transferred to the second battery 2, and thus charging of the second battery 2 is achieved through both the first battery 1 and the N stages of the first inductor 4, i.e., boost charging of the second battery 2 is achieved.

[0053] Next, in Figure 3C (i.e., in the first time frame of the second half-cycle), the controller 5 controls the lower switch group of N stages of the first bridge arm 3 to be turned off and the switch transistor of at least one of the upper switch group of N stages of the first bridge arm 3 to be turned on, so that current flows from the second battery 2 and sequentially through the turned-on upper switch transistors of the N stages of the first bridge arm 3, the N stages of inductors of the first inductor 4 connected to the turned-on upper switch transistors, the anode of the first battery 1, and the cathode of the first battery 1, and then back to the second battery 2. In this way, the energy in the second battery 2 can be transferred to the N stages of inductors of the first inductor 4 connected to the turned-on upper switch transistors and to the first battery 1, and thus, charging of the N stages of inductors of the first inductor 4 connected to the turned-on upper switch transistors and the first battery 1 is achieved through the second battery 2. In this way, buck charging of the first battery 1 through the second battery 2 can be achieved.

[0054] Finally, in Figure 3D (i.e., in the second time frame of the second half-cycle), the controller 5 controls the upper switch group of N stages of the first bridge arm 3 to be turned off and at least one switch transistor of the lower switch group of N stages of the first bridge arm 3 to be turned on, so that current flows from the N stages of inductor 4 connected to the turned-on lower switch transistor, sequentially through the anode of the first battery 1, the cathode of the first battery 1, and the turned-on lower switch transistor of the N stages of the first bridge arm 3, and then back to the N stages of inductor 4 connected to the turned-on lower switch transistor. In this way, the energy in the N stages of the first inductor 4 can be transferred to the first battery 1, and thus the first inductor 4 can charge the first battery 1.

[0055] Therefore, by controlling the N upper and lower switch groups of the first bridge arm 3 to alternately turn on, the periodic operation of the states in Figures 3A to 3D is achieved, completing the charging and discharging of the first battery 1 and the second battery 2, i.e., the charging and discharging of the first battery 1 and the second battery 2 is completed, and thus self-heating of the first battery 1 and the second battery 2 is achieved.

[0056] Figure 4 is a block diagram of an energy processing device according to another exemplary embodiment. Referring to Figure 4, the energy processing device may further include an energy transfer circuit 6 located between a first battery 1 and a second battery 2. The energy transfer circuit 6 is connected to a controller 5. The energy transfer circuit 6 is configured to achieve energy transfer between the first battery 1 and the second battery 2. In this case, the controller is further configured to control the energy transfer circuit 6 to alternately charge and discharge the first battery 1 and the second battery 2 (for example, periodically charge and discharge) to achieve self-heating of the first battery 1 and the second battery 2, i.e., to achieve self-heating of the first battery 1 and the second battery 2 through the energy transfer circuit 6.

[0057] In this disclosure, when the batteries need to be heated, the first battery 1 and the second battery 2 can be self-heated only through the energy transfer circuit 6, or the first battery 1 and the second battery 2 can be self-heated only through the first bridge arm 3, or the first battery 1 and the second battery 2 can be self-heated through both self-heating methods, thereby maximizing the heating efficiency of the batteries.

[0058] The following is a detailed description of the specific structure of the energy transfer circuit 6. Specifically, referring to Figures 5A and 5B, for M≧1, the energy transfer circuit 6 includes M stages of the second bridge arm B and M stages of the second inductor KM. That is, the energy transfer circuit 6 includes at least one stage of the second bridge arm B and at least one stage of the second inductor KM.

[0059] The M stages of the second bridge arm B and the M stages of the inductor KM can be connected to the first battery 1 and the second battery 2 in various ways. In one implementation, referring to Figure 5A, the first end of each stage of the second bridge arm B (i.e., the first bus terminal of the M stages of the second bridge arm B) is connected to the anode of the second battery 2. The second end of each stage of the second bridge arm B (i.e., the second bus terminal of the M stages of the second bridge arm B) is connected separately to the cathode of the second battery 2 and the cathode of the first battery 1. The first end of each stage of the second inductor KM is connected to the corresponding midpoint of the second bridge arm B. That is, the first end of the M stages of the second inductor KM is connected one-to-one to the corresponding midpoint of the M stages of the second bridge arm B. The second end of each stage of the second inductor KM is connected to the anode of the first battery 1. In other words, the second ends of the M stages of the second inductor KM are connected together to form a neutral point. The neutral point is connected to the anode of the first battery 1. In this case, the voltage of the first battery 1 is lower than the voltage of the second battery 2.

[0060] In another implementation, referring to Figure 5B, the first end of each stage of the second bridge arm B (i.e., the first bus terminal of the M stages of the second bridge arm B) is connected to the anode of the first battery 1. The second end of each stage of the second bridge arm B (i.e., the second bus terminal of the M stages of the second bridge arm B) is connected separately to the cathode of the first battery 1 and the cathode of the second battery 2. The first end of each stage of the second inductor KM is connected to the corresponding midpoint of the second bridge arm B. That is, the first ends of the M stages of the second inductor KM are connected one-to-one to the corresponding midpoints of the M stages of the second bridge arm B. The second end of each stage of the second inductor KM is connected to the anode of the second battery 2. That is, the second ends of the M stages of the second inductor KM are connected together to form a neutral point. The neutral point is connected to the anode of the second battery 2. In this case, the voltage of the first battery 1 is higher than the voltage of the second battery 2.

[0061] Regarding the energy processing apparatus shown in Figures 5A and 5B, the controller 5 can be further configured to control the second bridge arm B in a second preset state to alternately charge and discharge the first battery 1 and the second battery 2, thereby achieving self-heating of the first battery 1 and the second battery 2. The second preset state is a state in which self-heating of the first battery 1 and the second battery 2 is achieved through the second bridge arm B.

[0062] Specifically, the controller 5 controls at least one stage of the second bridge arm B to alternately charge and discharge the first battery 1 and the second battery 2, thereby achieving self-heating of the first battery 1 and the second battery 2, that is, self-heating of the first battery 1 and the second battery 2 can be achieved through at least one stage of the second bridge arm B. The second target inductor is an inductor with M stages of inductor KM connected to at least one stage of the second bridge arm B.

[0063] Figures 5A and 5B illustrate the concept by taking M=1 as an example, but it should be understood by those skilled in the art that the number of bridge arms and inductors in Figures 5A and 5B are merely illustrative. Furthermore, in this disclosure, the energy transfer circuit 6 may be any other circuit capable of achieving voltage boosting or backing, in addition to the circuit configuration shown in Figure 5A or Figure 5B, which is not specifically limited in this disclosure.

[0064] The following is a detailed description of a specific implementation in which the second bridge arm B is controlled in a second preset state to alternately charge and discharge the first battery 1 and the second battery 2.

[0065] In one implementation, the controller 5 of the energy processing device shown in Figure 5A is configured to control the second bridge arm B in the first half-cycle of the control cycle to discharge the first battery and charge the second battery, and to control the second bridge arm B in the second half-cycle of the control cycle to charge the first battery 1 and discharge the second battery 2.

[0066] Specifically, the controller 5 controls the first time frame of the first half-cycle so that at least one lower switch group of the second bridge arm B is turned on and at least one upper switch group of the second bridge arm B is turned off, thereby discharging the first battery 1 and storing energy in the first inductor 4; the controller 5 controls the first time frame of the first half-cycle so that at least one upper switch group of the first bridge arm B is turned on and at least one lower switch group of the first bridge arm B is turned off, thereby discharging the first battery 1 and releasing the energy stored in the first inductor 4, thereby charging the second battery 2.

[0067] In the first time frame of the second half-cycle, the system is configured to charge the first battery 1, discharge the second battery 2, and store energy in the first inductor 4 by controlling the upper switch group of at least one stage of the second bridge arm B to be turned on and the lower switch group of at least one stage of the second bridge arm B to be turned off. In the second time frame of the second half-cycle, the system is configured to charge the first battery 1 and release the energy stored in the first inductor 4 by controlling the lower switch group of at least one stage of the second bridge arm B to be turned on and the upper switch group of at least one stage of the second bridge arm B to be turned off.

[0068] In another implementation, for the energy processing device shown in Figure 5B, the controller 5 is configured to control the second bridge arm B in the first half-cycle of the control cycle to charge the first battery 1 and discharge the second battery 2, and then control the second bridge arm B in the second half-cycle of the control cycle to discharge the first battery 1 and charge the second battery 2.

[0069] Specifically, the controller 5 controls the following in the first time frame of the first half-cycle: the lower switch group of at least one stage of the second bridge arm B is turned on and the upper switch group of at least one stage of the second bridge arm B is turned off, thereby discharging the second battery 2 and storing energy in the first inductor 4; and in the second time frame of the first half-cycle: the upper switch group of at least one stage of the second bridge arm B is turned on and the lower switch group of at least one stage of the second bridge arm B is turned off, thereby discharging the second battery 2, releasing the energy stored in the first inductor 4, and charging the first battery 1.

[0070] In the first time frame of the second half-cycle, the system is configured to control the upper switch group of at least one stage of the second bridge arm B to be turned on and the lower switch group of at least one stage of the second bridge arm B to be turned off, thereby discharging the first battery 1, charging the second battery 2, and storing energy in the first inductor 4. In the second time frame of the second half-cycle, the system is configured to control the lower switch group of at least one stage of the second bridge arm B to be turned on and the upper switch group of at least one stage of the second bridge arm B to be turned off, thereby charging the second battery 2 and releasing the energy stored in the first inductor 4.

[0071] The operating principle for heating the first battery 1 and the second battery 2 by using the energy processing device shown in Figure 5A in the second preset state will be explained in detail below with reference to Figures 6A to 6D.

[0072] In Figure 6A (i.e., in the first time frame of the first half-cycle), the controller 5 controls the upper switch group of M stages of the second bridge arm B to be turned off and at least one switch transistor of the lower switch group of M stages of the second bridge arm B to be turned on, so that current flows from the anode of the first battery 1, sequentially through the M stages of inductors of the second inductor KM connected to the turned-on lower switch transistors, and through the M stages of turned-on lower switch transistors of the second bridge arm B, and then back to the cathode of the first battery 1. In this way, the controller 5 can achieve the effect of the first battery 1 charging (storing energy) the M stages of inductors of the second inductor KM connected to the turned-on lower switch transistors. Furthermore, by controlling the number and duty cycle of the lower switch transistors, the magnitude of the charging current can be controlled, and therefore the magnitude of the charging power can be controlled.

[0073] Next, in Figure 6B (i.e., in the second time frame of the first half-cycle), the controller 5 controls the lower switch group of M stages of the second bridge arm B to be turned off and at least one switch transistor of the upper switch group of M stages of the second bridge arm B to be turned on, so that current flows from the first battery 1, through the M stages of the second inductor KM connected to the turned-on upper switch transistor, through the M stages of the turned-on upper switch transistor of the second bridge arm B, through the anode of the second battery 2, through the cathode of the second battery 2, and then back to the first battery 1. In this way, the energy in the first battery 1 and the M stages of the second inductor KM can be transferred to the second battery 2, and thus charging of the second battery 2 is achieved through both the first battery 1 and the M stages of the second inductor KM, i.e., boost charging of the second battery 2 through the first battery 1.

[0074] Next, in Figure 6C (i.e., in the first time frame of the second half-cycle), the controller 5 controls the lower switch groups of the M stages of the second bridge arm B to be turned off and at least one switch transistor of the upper switch group of the M stages of the second bridge arm B to be turned on, so that current flows from the second battery 2 and sequentially through the M stages of the turned-on upper switch transistors of the second bridge arm B, the M stages of inductors of the second inductor KM connected to the turned-on upper switch transistors, the anode of the first battery 1, and the cathode of the first battery 1, and then returns to the second battery 2. In this way, the energy in the second battery 2 can be transferred to the M stages of the second inductor KM connected to the switched-on upper switch transistor and to the first battery 1, and thus charging of the M stages of the second inductor KM connected to the switched-on upper switch transistor and the first battery 1 can be achieved through the second battery 2. In this way, step-down charging of the first battery 1 can be achieved through the second battery 2.

[0075] Finally, in Figure 6D (i.e., in the second time frame of the second half-cycle), the controller 5 controls the upper switch group of M stages of the second bridge arm B to be turned off and at least one switch transistor of the lower switch group of M stages of the second bridge arm B to be turned on, so that current flows from the M stages of the second inductor KM connected to the turned-on lower switch transistor, sequentially through the anode of the first battery 1, the cathode of the first battery 1, and the turned-on lower switch transistor of the M stages of the second bridge arm B, and then back to the M stages of the second inductor KM connected to the turned-on lower switch transistor. In this way, the energy in the M stages of the second inductor KM can be transferred to the first battery 1, and thus charging of the first battery 1 through the M stages of the second inductor KM is achieved.

[0076] Therefore, by controlling the upper and lower switch groups of the M stages of the second bridge arm B to be turned on alternately, the periodic operation of the states in Figures 6A to 6D is achieved, completing the charging and discharging of the first battery 1 and the second battery 2, i.e., the charging and discharging of the first battery 1 and the second battery 2 is completed, and thus self-heating of the first battery 1 and the second battery 2 is achieved.

[0077] The operating principle for heating the first battery 1 and the second battery 2 by using the energy processing device shown in Figure 5B in the second preset state will be explained in detail below with reference to Figures 7A to 7D.

[0078] In Figure 7A (i.e., in the first time frame of the first half-cycle), the controller 5 controls the upper switch group of M stages of the second bridge arm B to be turned off and at least one switch transistor of the lower switch group of M stages of the second bridge arm B to be turned on, so that current flows from the anode of the second battery 2, sequentially through the M stages of inductors of the second inductor KM connected to the turned-on lower switch transistors, and through the M stages of turned-on lower switch transistors of the second bridge arm B, and then back to the cathode of the second battery 2. In this way, the controller 5 can achieve the effect of the second battery 2 charging (storing energy) the M stages of inductors of the second inductor KM connected to the turned-on lower switch transistors. Furthermore, by controlling the number and duty cycle of the lower switch transistors, the magnitude of the charging current can be controlled, and therefore the magnitude of the charging power can be controlled.

[0079] Next, in Figure 7B (i.e., in the second time frame of the first half-cycle), the controller 5 controls the lower switch groups of the M stages of the second bridge arm B to be turned off and at least one switch transistor of the upper switch groups of the M stages of the second bridge arm B to be turned on, so that current flows from the second battery 2, sequentially through the M stages of the second inductor KM connected to the turned-on upper switch transistors, the turned-on upper switch transistors of the M stages of the second bridge arm B, the anode of the first battery 1, and the cathode of the first battery 1, and back to the second battery 2. In this way, the energy in the second battery 2 and the M stages of the second inductor KM can be transferred to the first battery 1, and thus charging of the first battery 1 is achieved through both the second battery 2 and the M stages of the second inductor KM, i.e., boost charging of the first battery 1 is achieved through the second battery 2.

[0080] Next, in Figure 7C (i.e., in the first time frame of the second half-cycle), the controller 5 turns off the lower switch group of M stages of the second bridge arm B and turns on at least one switch transistor of the upper switch group of M stages of the second bridge arm B, resulting in current flowing from the first battery 1 and sequentially through the turned-on upper switch transistors of the M stages of the second bridge arm B, the M stages of inductors of the second inductor KM connected to the turned-on upper switch transistors, the anode of the second battery 2, and the cathode of the second battery 2, and then back to the first battery 1. In this way, the energy in the first battery 1 can be transferred to the M stages of inductors of the second inductor KM connected to the turned-on upper switch transistors and to the second battery 2, and thus charging of the M stages of inductors of the second inductor KM connected to the turned-on upper switch transistors and the second battery 2 is achieved through the first battery 1. In this way, step-down charging of the second battery 2 through the first battery 1 can be achieved.

[0081] Finally, in Figure 7D (i.e., in the second time frame of the second half-cycle), the controller 5 controls the upper switch group of M stages of the second bridge arm B to be turned off and at least one switch transistor of the lower switch group of M stages of the second bridge arm B to be turned on, so that current flows from the M stages of the second inductor KM connected to the turned-on lower switch transistor, sequentially through the anode of the second battery 2, the cathode of the second battery 2, and the M stages of the turned-on lower switch transistor of the second bridge arm B, and back to the M stages of the second inductor KM connected to the turned-on lower switch transistor. In this way, the energy in the M stages of the second inductor KM can be transferred to the second battery 2, and thus charging of the second battery 2 through the M stages of the second inductor KM is achieved.

[0082] Therefore, by controlling the upper and lower switch groups of the M stages of the second bridge arm B to be turned on alternately, the periodic operation of the states in Figures 7A to 7D is achieved, completing the charging and discharging of the first battery 1 and the second battery 2, i.e., the charging and discharging of the first battery 1 and the second battery 2 is completed, and thus self-heating of the first battery 1 and the second battery 2 is achieved.

[0083] Referring to Figures 8 and 9, the second battery 2 is configured to be connected to a high-voltage load 7. In this case, the second battery 2 can be discharged in various ways. In one implementation, the controller 5 can be further configured to control the second battery 2 to supply power to the high-voltage load 7 in a third preset state (as shown in Figure 10A), i.e., to control the second battery 2 to be discharged directly to the high-voltage load 7. The third preset state is a state in which only the second battery 2 is discharged.

[0084] In an alternative implementation, the controller 5 may be further configured to control the energy transfer circuit 6 in a third preset state to cause the second battery 2 to charge the first battery 1 (as shown in Figure 10B), i.e., to discharge the second battery 2 to the first battery 1 through the energy transfer circuit 6.

[0085] In yet another implementation, the controller 5 can be further configured to control the second battery 2 to supply power to the high-voltage load 7, and to control the energy transfer circuit 6 in a third preset state to charge the first battery 1 with the second battery 2, that is, to control the second battery 2 to charge the first battery 1 while supplying power to the high-voltage load 7.

[0086] When the N stages of the first bridge arm 3 are vehicle controllers, the N stages of bridge arm B can also act as high-voltage loads. That is, the second battery 2 is discharged into the N stages of the first bridge arm 3. When the N stages of the first inductor 4 are motor coils, the N stages of the first inductor 4 can also act as high-voltage loads. That is, the second battery 2 is discharged into the N stages of the first inductor 4.

[0087] In the energy processing apparatus of Figures 8 and 9, the first battery 1 can also be discharged in various ways. In one implementation, the controller 5 can be further configured to control the energy transfer circuit 6 in a fourth preset state to cause the first battery 1 to supply power to the high-voltage load 7 (as shown in Figure 11A), i.e., to be discharged to the high-voltage load 7 through the energy transfer circuit 6. The fourth preset state is a state in which only the first battery 1 is discharged.

[0088] In an alternative implementation, the controller 5 may be further configured to control the energy transfer circuit 6 in a fourth preset state to cause the first battery 1 to charge the second battery 2 (as shown in Figure 11B), i.e., to control the first battery 1 to charge the second battery 2 through the energy transfer circuit 6.

[0089] In yet another implementation, the controller 5 can be further configured to control the energy transfer circuit 6 in a fourth preset state to cause the first battery 1 to supply power to the high-voltage load 7 and charge the second battery 2, that is, to control the first battery 1 to charge the second battery 2 while supplying power to the high-voltage load 7.

[0090] When the N stages of the first bridge arm 3 are vehicle controllers, the N stages of the first bridge arm 3 can also act as high-voltage loads. That is, the first battery 1 is discharged into the N stages of the first bridge arm 3. When the N stages of the first inductor 4 are motor coils, the N stages of the first inductor 4 can also act as high-voltage loads. That is, the first battery 1 is discharged into the N stages of the first inductor 4.

[0091] Regarding the energy processing device shown in Figures 8 and 9, the controller 5 can be further configured to control the energy transfer circuit 6 and the second battery 2 in a fifth preset state so that the second battery 2 and the first battery 1 can simultaneously supply power to the high-voltage load 7. The fifth preset state is a state in which the first battery 1 and the second battery 2 simultaneously supply power to the high-voltage load.

[0092] In this disclosure, the first battery 1 and the second battery 2 can supply power to a high-voltage load separately or together, according to the load input requirements.

[0093] If the first battery 1 is a power-type battery and the second battery 2 is an energy-type battery, when the high-voltage load 7 has a momentary high power demand, the first battery 1, being a power-type battery, needs to release high-power energy to the high-voltage load 7 through the energy transfer circuit 6. This requires a larger volume energy transfer circuit 6, which undoubtedly increases costs. The greater the power of the energy transfer circuit 6, the larger the volume and correspondingly the higher the cost. If the first battery 1 is an energy-type battery and the second battery 2 is a power-type battery, when the high-voltage load 7 has a momentary high power demand, the second battery 2, being a power-type battery, needs to supply power to the high-voltage load 7. The second battery 2 supplies power directly to the high-voltage load 7. Therefore, even if the second battery 2 releases high-power energy to the high-voltage load, this does not increase costs. Thus, in one embodiment, to reduce costs, the first battery 1 is an energy-type battery and the second battery 2 is a power-type battery.

[0094] Furthermore, when the vehicle is in a braking state, the high-voltage load 7, the first bridge arm 3, and the first inductor 4 can generate a feedback current. In this case, in order to achieve energy recycling, the feedback current can be fed back to at least one of the first battery 1 and the second battery 2. Specifically, in the energy processing device of Figures 8 and 9, the controller 5 can be further configured to control the motor controller in a sixth preset state to store braking feedback energy in the second battery 2, i.e., to feed back the feedback current generated by the high-voltage load 7, the first bridge arm 3, and the first inductor 4 to the second battery 2, and / or to control the motor controller and the second bridge arm B to store braking feedback energy in the first battery 1, i.e., to feed back the feedback current generated by the high-voltage load 7, the first bridge arm 3, and the first inductor 4 to the first battery 1. The sixth preset state is the vehicle braking state.

[0095] In one implementation, the controller 5 can be further configured to control the motor controller in a sixth preset state to store braking feedback energy in the second battery 2, i.e., to feed back the feedback current generated by the high-voltage load 7, the first bridge arm 3, and the first inductor 4 (as shown in Figure 12A) to the second battery 2.

[0096] In an alternative implementation, the controller 5 can be further configured to control the motor controller and the second bridge arm B in a sixth preset state to store braking feedback energy in the first battery 1, i.e., to feed back the feedback current generated by the high-voltage load 7, the first bridge arm 3, and the first inductor 4 (as shown in Figure 12B) to the first battery 1.

[0097] In yet another implementation, the controller 5 can be further configured to control the motor controller in a sixth preset state to store braking feedback energy in the second battery 2, and simultaneously control the motor controller and the second bridge arm B to store braking feedback energy in the first battery 1, that is, to feed back the feedback current generated by the high-voltage load 7, the first bridge arm 3, and the first inductor 4 to the second battery 2 and the first battery 1.

[0098] In this disclosure, the high-voltage load 7 can feed energy back to the first battery 1 and the second battery 2 separately or simultaneously, depending on the actual situation.

[0099] Referring to Figures 13A and 13B, the energy processing device may further include a DC charging port 8, a switching circuit 9, and a switching device S1.

[0100] The first end of the switching circuit 9 is connected to the anode of the DC charging port 8. The second end of the switching circuit 9 is selectively connected to the anode of the first battery 1 and the anode of the second battery 2. The DC charging port 8 is configured to be connected to an external power supply device. The first end of the switching device S1 is connected to each stage of the first inductor 4. The second end of the switching device S1 is connected to the anode of the first battery 1.

[0101] In one embodiment, referring to Figures 13A and 13B, the switching circuit 9 includes a first switch S2 and a second switch S3. The first end of the first switch S2 is connected separately to the energy transfer circuit 6 and the anode of the first battery 1. The second end of the first switch S2 is connected to the anode of the DC charging port 8. The first end of the second switch S3 is connected separately to the anode of the second battery 2 and the energy transfer circuit 6. The second end of the second switch S3 is connected separately to the first switch S2 and the anode of the DC charging port 8. When the switching circuit 9 needs to be connected to the anode of the first battery 1, the first switch S2 can be controlled to be ON and the second switch S3 can be controlled to be OFF. When the switching circuit 9 needs to be connected to the anode of the second battery 2, the first switch S2 can be controlled to be OFF and the second switch S3 can be controlled to be ON.

[0102] In an alternative implementation, the switching circuit 9 may be a single-pole double-throw switch for selectively connecting to the anode of the first battery 1 and the anode of the second battery 2.

[0103] In this case, the controller 5 is connected separately to the switching circuit 9 and the switching device S1, and in the first mode, it can be further configured to charge the first battery 1 by controlling the switching circuit 9 to connect to the anode of the first battery 1 (i.e., by controlling the first switch S2 to turn on and the second switch S3 to turn off), and by controlling the switching device S1 to turn off, and to control the second bridge arm B to supply power to the second battery 2. The first mode is a state in which the first battery 1 is charged and at the same time power is supplied to the second battery 2 through the second bridge arm B.

[0104] The operating principle of charging the first battery 1 and simultaneously supplying power to the second battery 2 through the second bridge arm B using the energy processing device shown in Figure 13A in the first mode will be explained in detail below with reference to Figures 14A to 14C.

[0105] In Figure 14A, the controller 5 controls the first switch S2 to turn on, the second switch S3 and switching device S1 to turn off, and the upper and lower switch groups of the M stages of the second bridge arm B to turn off, i.e., the M stages of the second bridge arm B are not in operation. In this case, the external power supply device charges the first battery 1 only through the DC charging port 8.

[0106] Next, in Figure 14B, the controller 5 controls at least one switch transistor in the lower switch group of the M stages of the second bridge arm B to be turned on (the upper switch group of the M stages of the second bridge arm B remains off), and as a result, the external power supply device charges the first battery 1 through the DC charging port 8 and, at the same time, supplies power to the M stages of inductors of the second inductor KM connected to the turned-on lower switch transistor to store energy.

[0107] Next, in Figure 14C, the controller 5 controls the lower switch groups of the M stages of the second bridge arm B to be turned off, so that the external power supply device charges the first battery 1 through the DC charging port 8 and at the same time supplies power to the second battery 2 together with the M stages of the second inductor KM, thus achieving boost charging of the second battery 2.

[0108] The operating principle of charging the first battery 1 and simultaneously supplying power to the second battery 2 through the energy transfer circuit 6 using the energy processing device shown in Figure 13B in the first mode will be explained in detail below with reference to Figures 15A to 15B.

[0109] In Figure 15A, the controller 5 controls the first switch S2 to turn on, the switching device S1 and the second switch S3 to turn off, and the upper and lower switch groups of the M stages of the second bridge arm B to turn off, i.e., the M stages of the second bridge arm B are not in operation. In this case, the external power supply device charges the first battery 1 only through the DC charging port 8.

[0110] Next, in Figure 15B, the controller 5 controls at least one switch transistor in the upper switch group of the M stages of the second bridge arm B to be turned on (the lower switch group of the M stages of the second bridge arm B remains off), so that the external power supply device charges the first battery 1 through the DC charging port 8 and, at the same time, supplies power to the second battery 2 through the M stages of inductors of the second inductor KM connected to the turned-on upper switch transistor, thus achieving step-down charging of the second battery 2.

[0111] In the energy processing apparatus of Figures 13A and 13B, the controller 5 is separately connected to the switching circuit 9 and the switching device S1. In the second mode, the controller 5 can be further configured to charge the second battery 2 by controlling the switching circuit 9 to connect to the anode of the second battery 2 (i.e., by controlling the second switch S3 to turn on and the first switch S2 to turn off), and by controlling the switching device S1 to turn off, and to control the second bridge arm B to supply power to the first battery 1. The second mode is a state in which the second battery 2 is charged and power is simultaneously supplied to the first battery 1 through the second bridge arm B.

[0112] The operating principle of charging the second battery 2 and simultaneously supplying power to the first battery 1 through the second bridge arm B using the energy processing device of the second mode shown in Figure 13A will be described in detail below with reference to Figures 16A and 16B.

[0113] In Figure 16A, the controller 5 controls the second switch S3 to turn on, the switching device S1 and the first switch S2 to turn off, and the upper and lower switch groups of the M stages of the second bridge arm B to turn off, i.e., the M stages of the second bridge arm B are not in operation. In this case, the external power supply device charges the first battery 2 only through the DC charging port 8.

[0114] Next, in Figure 16B, the controller 5 controls at least one switch transistor in the upper switch group of the M stages of the second bridge arm B to be turned on (the lower switch group of the M stages of the second bridge arm B remains off), so that the external power supply device charges the second battery 2 through the DC charging port 8 and at the same time supplies power to the first battery 1 through the M stages of inductors of the second inductor KM connected to the turned-on upper switch transistor, thus achieving step-down charging of the first battery 1.

[0115] The operating principle of charging the second battery 2 and simultaneously supplying power to the first battery 1 through the second bridge arm B using the energy processing device shown in Figure 13B in the second mode will be explained in detail below with reference to Figures 17A to 17C.

[0116] In Figure 17A, the controller 5 controls the second switch S3 to turn on, the switching device S1 and the first switch S2 to turn off, and the upper and lower switch groups of the M stages of the second bridge arm B to turn off, i.e., the M stages of the second bridge arm B are not in operation. In this case, the external power supply device charges the second battery 2 only through the DC charging port 8.

[0117] Next, in Figure 17B, the controller 5 controls at least one switch transistor in the lower switch group of the M stages of the second bridge arm B to be turned on (the upper switch group of the M stages of the second bridge arm B remains off), and as a result, the external power supply device charges the second battery 2 through the DC charging port 8 and, at the same time, supplies power to the M stages of inductors of the second inductor KM connected to the turned-on lower switch transistor to store energy.

[0118] Next, in Figure 17C, the controller 5 controls the lower switch groups of M stages of the second bridge arm B to be turned off, so that the external power supply device charges the second battery 2 through the DC charging port 8 and at the same time supplies power to the first battery 1 together with the M stages of inductors of the second inductor KM connected to the turned-on lower switch transistor, thus achieving boost charging of the first battery 1.

[0119] In this disclosure, the charging processes of the first battery 1 and the second battery 2 can be synchronized with the aforementioned self-heating processes of the first battery 1 and the second battery 2 to achieve coordinated self-heating and charging of the batteries.

[0120] Figures 6A to 7D and 9 to 17C illustrate the concepts by using N=3 and M=1 as examples, but it should be understood by those skilled in the art that the number of bridge arms and inductors in these figures are merely illustrative.

[0121] This disclosure further provides a vehicle including the aforementioned energy processing device.

[0122] An optional implementation of this disclosure has been described in detail above with reference to the attached drawings. However, this disclosure is not limited to the specific details of the above implementation, and various simple modifications can be made to the technical solutions of this disclosure within the scope of the technical concepts of this disclosure, and such simple modifications remain within the scope of protection of this disclosure.

[0123] Furthermore, it should be understood that the various specific technical features described in the above implementation can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, various possible combinations are not described in this disclosure.

[0124] Furthermore, various different implementations of this disclosure may also be combined at will without deviating from the concepts of this disclosure, and such combinations shall still be considered as being disclosed in this disclosure.

Claims

1. The system comprises a first battery (1), a second battery (2), at least one stage of a first bridge arm (3), at least one stage of a first inductor (4), and a controller (5). The anode of the second battery (2) is connected to the first end of each stage of the first bridge arm (3), and the cathode of the second battery (2) is separately connected to the second end of each stage of the first bridge arm (3) and to the cathode of the first battery (1). The first end of each stage of the first inductor (4) is connected to the midpoint of the corresponding first bridge arm (3), and the second end of each stage of the first inductor (4) is connected to the anode of the first battery (1). The controller (5) is connected to each stage of the first bridge arm (3) and is configured to control the first bridge arm (3) in a first preset state to alternately charge and discharge the first battery (1) and the second battery (2) and to achieve self-heating of the first battery (1) and the second battery (2). An energy processing device further comprising an energy transfer circuit (6) disposed between the first battery (1) and the second battery (2), wherein the energy transfer circuit (6) is connected to the controller (5), and the energy transfer circuit (6) is configured to achieve energy transfer between the first battery (1) and the second battery (2).

2. A first battery (1), a second battery (2), at least one stage of a first bridge arm (3), at least one stage of a first inductor (4), and a controller (5), The anode of the second battery (2) is connected to the first end of each stage of the first bridge arm (3), and the cathode of the second battery (2) is separately connected to the second end of each stage of the first bridge arm (3) and to the cathode of the first battery (1). The first end of each stage of the first inductor (4) is connected to the midpoint of the corresponding first bridge arm (3), and the second end of each stage of the first inductor (4) is connected to the anode of the first battery (1). The controller (5) is connected to each stage of the first bridge arm (3) and is configured to control the first bridge arm (3) in a first preset state to alternately charge and discharge the first battery (1) and the second battery (2) and to achieve self-heating of the first battery (1) and the second battery (2). The controller (5) In the first half-cycle of the control cycle, the first bridge arm (3) is controlled to discharge the first battery (1) and charge the second battery (2). An energy processing device configured to control the first bridge arm (3) in a second half-cycle of the control cycle to charge the first battery (1) and discharge the second battery (2).

3. The controller (5) During the first time frame of the first half-cycle, the lower switch group of at least one stage of the first bridge arm (3) is controlled to turn on, and the upper switch group of at least one stage of the first bridge arm (3) is controlled to turn off, thereby discharging the first battery (1) and storing energy in the first inductor (4). The apparatus according to claim 2, configured to discharge the first battery (1), release the energy stored in the first inductor (4), and charge the second battery (2) by controlling the upper switch group of at least one stage of the first bridge arm (3) to turn on and the lower switch group of at least one stage of the first bridge arm (3) to turn off during a second time frame of the first half-cycle.

4. The controller (5) In the first time frame of the second half-cycle, the upper switch group of at least one stage of the first bridge arm (3) is controlled to turn on and the lower switch group of at least one stage of the first bridge arm (3) is controlled to turn off, thereby charging the first battery (1), discharging the second battery, and storing energy in the first inductor (4). The apparatus according to claim 2, configured such that, in the second time frame of the second half-cycle, the lower switch group of at least one stage of the first bridge arm (3) is turned on and the upper switch group of at least one stage of the first bridge arm (3) is turned off, thereby charging the first battery (1) and releasing the energy stored in the first inductor (4).

5. A device comprising a first battery (1), a second battery (2), at least one stage of a first bridge arm (3), at least one stage of a first inductor (4), and a controller (5), The anode of the second battery (2) is connected to the first end of each stage of the first bridge arm (3), and the cathode of the second battery (2) is separately connected to the second end of each stage of the first bridge arm (3) and to the cathode of the first battery (1). The first end of each stage of the first inductor (4) is connected to the midpoint of the corresponding first bridge arm (3), and the second end of each stage of the first inductor (4) is connected to the anode of the first battery (1). The controller (5) is connected to each stage of the first bridge arm (3) and is configured to control the first bridge arm (3) in a first preset state to alternately charge and discharge the first battery (1) and the second battery (2) and to achieve self-heating of the first battery (1) and the second battery (2). An energy processing device in which the bridge arm of a motor controller is reused as the first bridge arm (3), and the coil of a motor is reused as the first inductor (4).

6. The energy transfer circuit (6) At least one stage of the second bridge arm (B), wherein the first end of each stage of the second bridge arm (B) is connected to the anode of the second battery (2), and the second end of each stage of the second bridge arm (B) is separately connected to the cathode of the second battery (2) and the cathode of the first battery (1), The present invention comprises at least one stage of a second inductor (KM), wherein the first end of each stage of the second inductor (KM) is connected to the midpoint of the corresponding second bridge arm (B), and the second end of each stage of the second inductor (KM) is connected to the anode of the first battery (1), The controller (5) is connected to each stage of the second bridge arm (B), and the controller (5) The apparatus according to claim 1, further configured to control the second bridge arm (B) in a second preset state to alternately charge and discharge the first battery (1) and the second battery (2) to achieve self-heating of the first battery (1) and the second battery (2).

7. The controller (5) In the first half-cycle of the control cycle, the second bridge arm (B) is controlled to discharge the first battery (1) and charge the second battery (2). The apparatus according to claim 6, configured to control the second bridge arm (B) in a second half-cycle of the control cycle to charge the first battery (1) and discharge the second battery (2).

8. The energy transfer circuit (6) At least one stage of the second bridge arm (B), wherein the first end of each stage of the second bridge arm (B) is connected to the anode of the first battery (1), and the second end of each stage of the second bridge arm (B) is separately connected to the cathode of the first battery (1) and the cathode of the second battery (2), The present invention comprises at least one stage of a second inductor (KM), wherein the first end of each stage of the second inductor (KM) is connected to the midpoint of the corresponding second bridge arm (B), and the second end of each stage of the second inductor (KM) is connected to the anode of the second battery (2), The controller (5) is connected to each stage of the second bridge arm (B), and the controller (5) The apparatus according to claim 1, further configured to control the second bridge arm (B) in a second preset state to alternately charge and discharge the first battery (1) and the second battery (2) to achieve self-heating of the first battery (1) and the second battery (2).

9. The controller (5) In the first half-cycle of the control cycle, the second bridge arm (B) is controlled to charge the first battery (1) and discharge the second battery (2). The apparatus according to claim 8, configured to control the second bridge arm (B) in a second half-cycle of the control cycle to discharge the first battery (1) and charge the second battery (2).

10. DC charging port (8), A switching circuit (9) wherein the first end of the switching circuit (9) is connected to the anode of the DC charging port (8), and the second end of the switching circuit (9) is selectively connected to the anode of the first battery (1) and the anode of the second battery (2), The apparatus according to claim 6, further comprising a switching device (S1), wherein a first end of the switching device (S1) is connected to each stage of a first inductor (4), and a second end of the switching device (S1) is connected to the anode of the first battery (1).

11. The apparatus according to claim 10, wherein the controller (5) is separately connected to the switching circuit (9) and the switching device (S1), and the controller (5) is further configured to charge the first battery (1) in a first mode by controlling the switching circuit (9) to be connected to the anode of the first battery (1) and by controlling the switching device (S1) to be turned off, and by controlling the second bridge arm (B) to supply power to the second battery (2).

12. The apparatus according to claim 10, wherein the controller (5) is separately connected to the switching circuit (9) and the switching device (S1), and the controller (5) is further configured to charge the second battery (2) by controlling the switching circuit (9) to be connected to the anode of the second battery (2) and by controlling the switching device (S1) to be turned off in a second mode, and by controlling the second bridge arm (B) to supply power to the first battery (1).

13. A first battery (1), a second battery (2), at least one stage of a first bridge arm (3), at least one stage of a first inductor (4), and a controller (5), The anode of the second battery (2) is connected to the first end of each stage of the first bridge arm (3), and the cathode of the second battery (2) is separately connected to the second end of each stage of the first bridge arm (3) and to the cathode of the first battery (1). The first end of each stage of the first inductor (4) is connected to the midpoint of the corresponding first bridge arm (3), and the second end of each stage of the first inductor (4) is connected to the anode of the first battery (1). The controller (5) is connected to each stage of the first bridge arm (3) and is configured to control the first bridge arm (3) in a first preset state to alternately charge and discharge the first battery (1) and the second battery (2) and to achieve self-heating of the first battery (1) and the second battery (2). An energy processing device in which the first battery (1) is an energy-type battery, the second battery (2) is a power-type battery, and the charging speed and discharge speed of the power-type battery are greater than the charging speed and discharge speed of the energy-type battery.

14. The apparatus according to claim 6, wherein the controller (5) is further configured to control the motor controller to store braking feedback energy in the second battery (2) and / or to control the motor controller and the second bridge arm (B) to store braking feedback energy in the first battery (1).

15. A vehicle comprising the energy processing device according to any one of claims 1 to 14.

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