Energy processing device and vehicle

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 This disclosure claims priority to Chinese Patent Application No. 202211493478.3, entitled "ENERGY PROCESSING APPARATUS AND VEHICLE," filed on November 25, 2022. The entire contents of the above-referenced application are incorporated herein by reference.

[0002] The present disclosure relates to the technical field of vehicles, and in particular to energy processing devices and vehicles. [Background technology]

[0003] Currently, with the rapid development of electric vehicles, their application scenarios are becoming increasingly widespread, requiring 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 capabilities of the drive system or charging system in low-temperature environments and seriously reducing the user experience.

[0004] To alleviate the low-temperature environmental limitations of power batteries, several heating solutions for power batteries have been proposed. Currently, heating power batteries is primarily 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, resulting in an increase in the overall cost of the entire vehicle. Furthermore, water ducts and pipelines are generally long, resulting in large heat transfer losses and resulting in reduced battery heating efficiency. Summary of the Invention

[0005] To overcome the problems existing in the related art, the present disclosure provides an energy processing device and a vehicle.

[0006] To achieve the above object, according to a first aspect, the present disclosure provides an energy processing device including 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 a cathode of the first battery. The first end of each stage of the first inductor is connected to a midpoint of a corresponding first bridge arm. The second end of each stage of the first inductor is connected to an 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 a first half cycle of a control cycle to discharge the first battery and charge the second battery, and to control the first bridge arm in a 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: control a lower switch group of at least one stage of the first bridge arm to be on and an upper switch group of at least one stage of the first bridge arm to be off during a first time slot of the first half cycle to discharge the first battery and store energy in the first inductor; and control an upper switch group of the at least one stage of the first bridge arm to be on and a lower switch group of the at least one stage of the first bridge arm to be off during a second time slot of the first half cycle to discharge the first battery, release the energy stored in the first inductor, and charge the second battery.

[0009] In one embodiment, the controller is configured to: control an upper switch group of at least one stage of the first bridge arm to be on and a lower switch group of at least one stage of the first bridge arm to be off during a first time slot of the second half cycle to charge the first battery, discharge the second battery, and store energy in the first inductor; and control a lower switch group of the at least one stage of the first bridge arm to be on and an upper switch group of the at least one stage of the first bridge arm to be off during a second time slot of the second half cycle to charge the first battery and release the energy stored in the first inductor.

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

[0011] In one embodiment, the device further includes an energy transmission circuit disposed between the first battery and the second battery, the energy transmission circuit coupled to the controller, and 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 second bridge arms, where a first end of each second bridge arm stage is connected to the anode of the second battery and a second end of each second bridge arm stage is connected to the cathode of the second battery and the cathode of the first battery, respectively; and at least one stage of second inductors, where a first end of each second inductor stage is connected to a midpoint of a corresponding second bridge arm and a second end of each second inductor stage is connected to the anode of the first battery. A controller is connected to each stage of the second bridge arms. The controller is further configured to control the second bridge arms in a second preset state to alternately charge and discharge the first battery and the second battery to achieve self-heating of the first battery and the second battery.

[0013] In one embodiment, the controller is configured to control the second bridge arm in a 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 a 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 second bridge arms, where a first end of each second bridge arm stage is connected to the anode of the first battery and a second end of each second bridge arm stage is connected to the cathode of the first battery and the cathode of the second battery, respectively; and at least one stage of second inductors, where a first end of each second inductor stage is connected to a midpoint of a corresponding second bridge arm and a second end of each second inductor stage is connected to the anode of the second battery. A controller is connected to each stage of the second bridge arms. The controller is further configured to control the second bridge arms in a second preset state to alternately charge and discharge the first battery and the second battery to achieve self-heating of the first battery and the second battery.

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

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

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

[0019] In one embodiment, the controller is separately connected to the switching circuit and the switching device, and is further configured to, in the second mode, control the switching circuit to connect to the positive terminal of the second battery and control the switching device to be off to charge the second battery and control the second bridge arm to supply power to the first battery.

[0020] In one embodiment, the apparatus comprises:

[0021] The power supply further includes a switching device, a first end of the switching device connected to each stage of the first inductor, and a second end of the switching device 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, and the charge and discharge rates of the power type battery are greater than the charge and discharge rates 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 the second battery and / or control the motor controller and the second bridge arm to store braking feedback energy in the first battery.

[0024] According to a second aspect, the present disclosure provides a vehicle including an energy processing device according to the first aspect of the present 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 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 a cathode of the first battery. The first end of each stage of the first inductor is connected to a midpoint of a corresponding first bridge arm. The second end of each stage of the first inductor is connected to an 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 battery and the second battery, thereby achieving self-heating of the first battery and the second battery. In this way, the first battery and the second battery can be alternately charged and discharged by controlling the first bridge arm in the first preset state, thereby achieving self-heating of the first battery and the second battery, better maintaining the battery temperature, improving the electrolyte activity and electrochemical reaction rate of the lithium-ion battery, 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. Furthermore, the first battery and the second battery can cooperate with each other and can be redundant, so that even if one of the batteries fails, not all loads on the vehicle will stop working, thereby improving the power supply stability of the vehicle.

[0026] Other features and advantages of the present disclosure are described in detail in the detailed description section below.

[0027] The accompanying drawings provide a more complete understanding of the present disclosure and are intended to constitute a part of this specification. The accompanying drawings and the following specific implementations are used together to explain the present disclosure and not to constitute limitations thereon. [Brief explanation of the drawings]

[0028] [Figure 1] FIG. 1 is a block diagram of an energy processing device in accordance with an exemplary embodiment. [Figure 2] FIG. 2 is a circuit topology diagram of an energy processing device according to an exemplary embodiment. [Figure 3A] 3 is an operation principle diagram of achieving self-heating of the first battery and the second battery by using the energy processing device of FIG. 2 in a first preset state according to an exemplary embodiment. [Figure 3B] 3 is an operation principle diagram of achieving self-heating of the first battery and the second battery by using the energy processing device of FIG. 2 in a first preset state according to an exemplary embodiment. [Figure 3C] 3 is an operation principle diagram of achieving self-heating of the first battery and the second battery by using the energy processing device of FIG. 2 in a first preset state according to an exemplary embodiment. [Figure 3D] 3 is an operation principle diagram of achieving self-heating of the first battery and the second battery by using the energy processing device of FIG. 2 in a first preset state according to an exemplary embodiment. [Figure 4] FIG. 10 is a block diagram of an energy processing device according to another exemplary embodiment. [Figure 5A] FIG. 10 is a circuit topology diagram of an energy processing device according to another exemplary embodiment. [Figure 5B] FIG. 10 is a circuit topology diagram of an energy processing device according to another exemplary embodiment. [Figure 6A] FIG. 5B is an operational principle diagram of achieving self-heating of the first battery and the second battery by using the energy processing device of FIG. 5A in a second preset state according to an exemplary embodiment. [Figure 6B] FIG. 5B is an operational principle diagram of achieving self-heating of the first battery and the second battery by using the energy processing device of FIG. 5A in a second preset state according to an exemplary embodiment. [Figure 6C]FIG. 5B is an operational principle diagram of achieving self-heating of the first battery and the second battery by using the energy processing device of FIG. 5A in a second preset state according to an exemplary embodiment. [Figure 6D] FIG. 5B is an operational principle diagram of achieving self-heating of the first battery and the second battery by using the energy processing device of FIG. 5A in a second preset state according to an exemplary embodiment. [Figure 7A] FIG. 5C is an operational principle diagram of achieving self-heating of the first battery and the second battery by using the energy processing device of FIG. 5B in a second preset state according to an exemplary embodiment. [Figure 7B] FIG. 5C is an operational principle diagram of achieving self-heating of the first battery and the second battery by using the energy processing device of FIG. 5B in a second preset state according to an exemplary embodiment. [Figure 7C] FIG. 5C is an operational principle diagram of achieving self-heating of the first battery and the second battery by using the energy processing device of FIG. 5B in a second preset state according to an exemplary embodiment. [Figure 7D] FIG. 5C is an operational principle diagram of achieving self-heating of the first battery and the second battery by using the energy processing device of FIG. 5B in a second preset state according to an exemplary embodiment. [Figure 8] FIG. 10 is a block diagram of an energy processing device according to another exemplary embodiment. [Figure 9] FIG. 10 is a circuit topology diagram of an energy processing device according to another exemplary embodiment. [Figure 10A] 10 is an operational principle diagram of directly powering a high voltage load by using a second battery in the energy processing device of FIG. 9 in a third preset state according to an exemplary embodiment. [Figure 10B] 10 is an operational principle diagram of charging a first battery by using a second battery in the energy processing device of FIG. 9 in a third preset state according to an exemplary embodiment. [Figure 11A]10 is an operational principle diagram of powering a high voltage load through an energy transfer circuit by using a first battery in the energy processing device of FIG. 9 in a fourth preset state according to an exemplary embodiment. [Figure 11B] 10 is an operation principle diagram of charging a second battery through an energy transfer circuit by using a first battery in the energy processing device of FIG. 9 in a fourth preset state according to an exemplary embodiment. [Figure 12A] FIG. 10 is an operation principle diagram of feeding back braking energy to the second battery by using the energy processing device of FIG. 9 in a sixth preset state according to an exemplary embodiment. [Figure 12B] FIG. 10 is an operation principle diagram of feeding back braking energy to the first battery by using the energy processing device of FIG. 9 in a sixth preset state according to an exemplary embodiment. [Figure 13A] FIG. 10 is a circuit topology diagram of an energy processing device according to another exemplary embodiment. [Figure 13B] FIG. 10 is a circuit topology diagram of an energy processing device according to another exemplary embodiment. [Figure 14A] FIG. 13B is an operational principle diagram 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 FIG. 13A in a first mode according to an exemplary embodiment. [Figure 14B] FIG. 13B is an operational principle diagram 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 FIG. 13A in a first mode according to an exemplary embodiment. [Figure 14C] FIG. 13B is an operational principle diagram 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 FIG. 13A in a first mode according to an exemplary embodiment. [Figure 15A]FIG. 13C is an operational principle diagram 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 FIG. 13B in a first mode according to an exemplary embodiment. [Figure 15B] FIG. 13C is an operational principle diagram 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 FIG. 13B in a first mode according to an exemplary embodiment. [Figure 16A] FIG. 13B is an operational principle diagram of charging a second battery and simultaneously supplying power to a first battery through a second bridge arm by using the energy processing device of FIG. 13A in a second mode according to an exemplary embodiment. [Figure 16B] FIG. 13B is an operational principle diagram of charging a second battery and simultaneously supplying power to a first battery through a second bridge arm by using the energy processing device of FIG. 13A in a second mode according to an exemplary embodiment. [Figure 17A] FIG. 13C is an operational principle diagram of charging a second battery and simultaneously supplying power to a first battery through a second bridge arm by using the energy processing device of FIG. 13B in a second mode according to an exemplary embodiment. [Figure 17B] FIG. 13C is an operational principle diagram of charging a second battery and simultaneously supplying power to a first battery through a second bridge arm by using the energy processing device of FIG. 13B in a second mode according to an exemplary embodiment. [Figure 17C] FIG. 13C is an operational principle diagram of charging a second battery and simultaneously supplying power to a first battery through a second bridge arm by using the energy processing device of FIG. 13B in a second mode according to an exemplary embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0029] Specific implementations of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific implementations described herein are merely used to explain and clarify the present disclosure, and are not intended to limit the present disclosure.

[0030] It should be understood that each of the operations for obtaining signals, information, or data in this disclosure is performed in accordance with the relevant data protection regulations and policies of the country in which it is located, as well as the permissions granted by the corresponding device owner.

[0031] The present disclosure provides an energy processing device. Referring to Fig. 1, the energy processing device may include a first battery 1, a second battery 2, at least one phase of first bridge arms 3, at least one phase of first inductors 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 a first end of each stage of the first bridge arm 3. The cathode of the second battery 2 is separately connected to a second end of each stage of the first bridge arm 3 and to a cathode of the first battery 1. The first end of each stage of the first inductor 4 is connected to a 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 (e.g., cyclically 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, i.e., to achieve self-heating of the first battery 1 and the second battery 2 through the first bridge arm 3.

[0033] In the present 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 cyclic charging and discharging refers to switching between charging and discharging at a certain frequency. Through the cyclic 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, thus achieving self-heating of the first battery 1 and the second battery 2.

[0034] Although FIG. 1 provides an illustration by taking an energy processing device including one stage of a first bridge arm 3 and a first inductor 4 as an example, it should be understood that those skilled in the art will understand that the number of bridge arms and the number of inductors in FIG. 1 are merely exemplary.

[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 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 a cathode of the first battery. The first end of each stage of the first inductor is connected to a midpoint of a corresponding first bridge arm. The second end of each stage of the first inductor is connected to an 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 battery and the second battery, thereby achieving self-heating of the first battery and the second battery. In this way, the first and second batteries can be alternately charged and discharged by controlling the first bridge arm in the first preset state, thereby achieving self-heating of the first and second batteries, better maintaining the battery temperature, improving the electrolyte activity and electrochemical reaction rate of the lithium-ion battery, 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. Furthermore, the first and second batteries can cooperate with each other and be redundant, so that even if one of the batteries fails, not all loads on the vehicle will stop operating, thereby improving the power supply stability of the vehicle.

[0036] Furthermore, the first battery 1 and the second battery 2 may be of the same type. For example, both may be energy-type batteries, or both may be power-type batteries. Energy-type batteries have a relatively large storage capacity and can therefore store a significant amount of energy. Power-type batteries have a high power density and can instantly provide a strong power output, i.e., power-type batteries can instantly discharge a large amount of current. Furthermore, the charge and discharge rates of power-type batteries are greater than those of energy-type batteries.

[0037] Indeed, the types of the first battery 1 and the second battery 2 can be different, i.e., the first battery 1 is one of an energy-type battery and a power-type battery, and the second battery 2 is the other of an energy-type battery and a power-type battery. In this way, the advantages of both the power-type battery and the energy-type battery can be utilized simultaneously, thus not only meeting the instantaneous high-power electricity demand of the load to ensure the power performance of the vehicle, but also achieving an ultra-long mile range.

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

[0039] Further illustratively, the first battery 1 is a power type battery and the second battery 2 is an energy type battery.

[0040] Referring to FIG. 2, the energy processing device includes N stages of first bridge arms 3 and N stages of first inductors 4, where N≧1.

[0041] The positive pole 2 of the second battery is connected to the first bus terminals of the N stages of the first bridge arm 3. The negative pole of the second battery 2 is separately connected to the second bus terminals of the N stages of the first bridge arm 3 and to the negative pole of the first battery 1. The first ends of the N stages of the first inductor 4 are correspondingly connected to the midpoints of the N stages of the first bridge arm 3 in a one-to-one relationship. 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 positive pole of the first battery 1.

[0042] In this case, the controller 5 (not shown in FIG. 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 of N stages of the first inductor 4 connected to the at least one stage of the first bridge arm 3.

[0043] In one embodiment, the controller 5 is configured to control the 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, and achieve 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 work simultaneously, thus maximizing the heating output and improving the self-heating effect of the first battery and the second battery.

[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 motor controllers. That is, the bridge arm of the motor controller is reused as the first bridge arm 3, and the coil of the motor is reused as the first inductor 4. In this way, the existing motor coils and motor controller on the vehicle are reused, thereby achieving 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 in this disclosure. 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 and enable the motor corresponding to the N stages of the first inductor 4 to output power, thereby driving the vehicle. Indeed, self-heating and vehicle driving can also be achieved synchronously through the N stages of the first inductor 4 and the N stages of the first bridge arm 3. In this way, by reusing the vehicle motor coil and motor controller, different functions can be achieved according to needs, and vehicle costs can be reduced.

[0045] It should be understood that although FIG. 2 provides an illustration by taking N=3 as an example, one skilled in the art would understand that the number of bridge arms and the number of inductors in FIG. 2 are merely illustrative.

[0046] Below is a detailed description of a specific implementation of controlling the first bridge arm 3 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 a first half cycle of a control cycle to discharge the first battery 1 and charge the second battery 2, and 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.

[0048] Specifically, the controller 5 controls the lower switch group of at least one stage of the first bridge arm 3 to be turned on and the upper switch group of at least one stage of the first bridge arm 3 to be turned off in a first time frame of the first half cycle, thereby discharging the first battery 1 and storing energy in the first inductor 4; and controls the upper switch group of at least one stage of the first bridge arm 3 to be turned on and the lower switch group of at least one stage of the first bridge arm 3 to be turned off in a second time frame of the first half cycle, thereby discharging the first battery 1, releasing the energy stored in the first inductor 4, and charging the second battery 2;

[0049] During a 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 be turned on and the lower switch group of at least one stage of the first bridge arm 3 is controlled to be turned off, thereby charging the first battery 1, discharging the second battery 2, and storing energy in the first inductor 4; and during a second time frame of the second half cycle, the lower switch group of at least one stage of the first bridge arm 3 is controlled to be turned on and the upper switch group of at least one stage of the first bridge arm 3 is controlled to be turned off, thereby charging the first battery 1 and releasing the energy stored in the first inductor 4.

[0050] The operating principle of heating the first battery 1 and the second battery 2 by using the energy processing device of FIG. 2 in a first preset state will be described in detail below with reference to FIGS. 3A to 3D.

[0051] 3A (i.e., in the first time frame of the first half-cycle), the controller 5 controls the upper switch group of the N stages of the first bridge arm 3 to be turned off and at least one switch transistor of the lower switch group of the 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 inductors of the N stages of the first inductor 4 connected to the turned-on lower switch transistors, and the turned-on lower switch transistors of the N stages 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 that the first battery 1 charges (stores energy in) the inductors of the N stages of the first inductor 4 connected to the turned-on lower switch transistors. Furthermore, by controlling the number and duty cycle of the turned-on lower switch transistors, the magnitude of the charging current can be controlled, and therefore the magnitude of the charging power can be controlled.

[0052] 3B (i.e., in the second time frame of the first half-cycle), the controller 5 controls the lower switch group of the N stages of the first bridge arm 3 to be turned off and at least one switch transistor of the upper switch group 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 inductors of the N stages of the first inductor 4 connected to the turned-on upper switch transistors, the turned-on upper switch transistors of the N stages 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, thus achieving charging of the second battery 2 through both the first battery 1 and the N stages of the first inductor 4, i.e., achieving boost charging of the second battery 2.

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

[0054] 3D (i.e., in the second time frame of the second half cycle), the controller 5 controls the upper switch group of the N stages of the first bridge arm 3 to be turned off and at least one switch transistor of the lower switch group of the N stages of the first bridge arm 3 to be turned on, so that current flows from the inductors of the N stages of the first inductor 4 connected to the turned-on lower switch transistor, to the anode of the first battery 1, the cathode of the first battery 1, and the lower switch transistors of the N stages of the first bridge arm 3 connected to the turned-on lower switch transistor, and then returns to the inductors of the N stages of the first 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, thereby achieving charging of the first battery 1 through the first inductor 4.

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

[0056] 4 is a block diagram of an energy processing device according to another exemplary embodiment. Referring to FIG. 4, the energy processing device may further include an energy transfer circuit 6 disposed between the first battery 1 and the second battery 2. The energy transfer circuit 6 is connected to the 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 (e.g., periodically 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, i.e., to achieve self-heating of the first battery 1 and the second battery 2 through the energy transfer circuit 6.

[0057] In the present 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, thus maximizing the heating efficiency of the batteries.

[0058] The following is a detailed description of a specific structure of the energy transfer circuit 6. Specifically, with reference to Figures 5A and 5B, the energy transfer circuit 6 includes M stages of the second bridge arm B and M stages of the second inductor KM, where M > 1. 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 manners. In one implementation, referring to FIG. 5A , a first end of each stage of the second bridge arm B (i.e., a first bus terminal of the M stages of the second bridge arm B) is connected to the anode of the second battery 2. A second end of each stage of the second bridge arm B (i.e., a second bus terminal of the M stages of the second bridge arm B) is connected to the cathode of the second battery 2 and the cathode of the first battery 1, respectively. A first end of each stage of the second inductor KM is connected to the midpoint of the corresponding second bridge arm B. That is, the first ends of the M stages of the second inductor KM are connected to the midpoints of the M stages of the second bridge arm B in a one-to-one relationship. A second end of each stage of the second inductor KM is connected to the anode of the first battery 1. That is, the second ends of the M stages of the second inductor KM are connected together to form a neutral point, which is connected to the positive terminal 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 FIG. 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 separately connected 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 midpoint of the corresponding second bridge arm B. That is, the first ends of the M stages of the second inductor KM are connected to the midpoints of the M stages of the second bridge arm B in a one-to-one relationship. 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] 5A and 5B, the controller 5 may 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 to achieve 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, i.e., achieving self-heating of the first battery 1 and the second battery 2 through at least one stage of the second bridge arm B. The second target inductor is an inductor of M stages of inductor KM connected to at least one stage of the second bridge arm B.

[0063] 5A and 5B provide an illustration by taking M=1 as an example, it should be understood that those skilled in the art can understand that the number of bridge arms and the number of inductors in FIG. 5A and 5B are merely exemplary. Furthermore, in the present disclosure, in addition to the circuit structure shown in FIG. 5A or 5B, the energy transfer circuit 6 may be any other circuit capable of achieving voltage boosting or bucking, which is not specifically limited in the present disclosure.

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

[0065] In one implementation, for the energy processing device of FIG. 5A, the controller 5 is configured to control the second bridge arm B in a 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 a 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 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 in a first time frame of the first half cycle, thereby discharging the first battery 1 and storing energy in the first inductor 4; controls the upper switch group of at least one stage of the first bridge arm to be turned on and the lower switch group of at least one stage of the first bridge arm to be turned off in a second time frame of the first half cycle, thereby discharging the first battery; controls 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 a second time frame of the first half cycle, thereby discharging the first battery 1, releasing the energy stored in the first inductor 4, and charging the second battery 2;

[0067] During a first time frame of the second half cycle, the upper switch group of at least one stage of the second bridge arm B is controlled to be turned on and the lower switch group of at least one stage of the second bridge arm B is controlled to be turned off, thereby charging the first battery 1, discharging the second battery 2, and storing energy in the first inductor 4; and during a second time frame of the second half cycle, the lower switch group of at least one stage of the second bridge arm B is controlled to be turned on and the upper switch group of the at least one stage of the second bridge arm B is controlled to be turned off, thereby charging the first battery 1 and releasing the energy stored in the first inductor 4.

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

[0069] Specifically, the controller 5 controls 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 during a first time frame of the first half cycle, thereby discharging the second battery 2 and storing energy in the first inductor 4; and controls 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 during a second time frame of the first half cycle, thereby discharging the second battery 2, releasing the energy stored in the first inductor 4, and charging the first battery 1;

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

[0071] The operating principle of heating the first battery 1 and the second battery 2 by using the energy processing device of FIG. 5A in the second preset state will be described in detail below with reference to FIGS. 6A to 6D.

[0072] 6A (i.e., in the first time frame of the first half-cycle), the controller 5 controls the upper switch group of the M stages of the second bridge arm B to be turned off and at least one switch transistor of the lower switch group of the 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 inductors of the M stages of the second inductor KM connected to the turned-on lower switch transistors, and then through the turned-on lower switch transistors of the M stages 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 that the first battery 1 charges (stores energy in) the inductors of the M stages 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] 6B (i.e., in the second time frame of the first half-cycle), the controller 5 controls the lower switch group 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 first battery 1, sequentially through the inductors of 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 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 M stages of the second inductor KM can be transferred to the second battery 2, thus achieving charging of the second battery 2 through both the first battery 1 and the M stages of the second inductor KM, i.e., achieving boost charging of the second battery 2 through the first battery 1.

[0074] Then, in FIG. 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, sequentially through the turned-on upper switch transistors of the M stages of the second bridge arm B, the inductors of the M stages of the second inductor KM connected to the turned-on upper switch transistors, the anode of the first battery 1, 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 M stages of inductors of the second inductor KM connected to the turned-on upper switch transistor and the first battery 1, thus achieving charging of the M stages of inductors of the second inductor KM connected to the turned-on upper switch transistor and the first battery 1 through the second battery 2. In this way, step-down charging of the first battery 1 through the second battery 2 can be achieved.

[0075] 6D (i.e., in the second time frame of the second half cycle), the controller 5 controls the upper switch group of the M stages of the second bridge arm B to be turned off and at least one switch transistor of the lower switch group of the M stages of the second bridge arm B to be turned on, so that current flows from the inductors of the M stages of the second inductor KM connected to the turned-on lower switch transistor, flows sequentially through the anode of the first battery 1, the cathode of the first battery 1, and the turned-on lower switch transistors of the M stages of the second bridge arm B, and then returns to the inductors of 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, thereby achieving charging of the first battery 1 through the M stages of the second inductor KM.

[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 of Figures 6A to 6D is achieved, and the charging and discharging of the first battery 1 and the charging and discharging of the second battery 2 are completed, i.e., the charging and discharging of the first battery 1 and the second battery 2 are completed, and thus the self-heating of the first battery 1 and the second battery 2 is achieved.

[0077] The operating principle of heating the first battery 1 and the second battery 2 by using the energy processing device of FIG. 5B in the second preset state will be described in detail below with reference to FIGS. 7A to 7D.

[0078] 7A (i.e., in the first time frame of the first half-cycle), the controller 5 controls the upper switch group of the M stages of the second bridge arm B to be turned off and at least one switch transistor of the lower switch group of the 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 inductors of the M stages of the second inductor KM connected to the turned-on lower switch transistors, and then through the turned-on lower switch transistors of the M stages 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 that the second battery 2 charges (stores energy in) the inductors of the M stages 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] 7B (i.e., in the second time frame of the first half-cycle), the controller 5 controls the lower switch group 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, sequentially through the inductors of 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 returns 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, thus achieving charging of the first battery 1 through both the second battery 2 and the M stages of the second inductor KM, i.e., achieving boost charging of the first battery 1 through the second battery 2.

[0080] 7C (i.e., in the first time frame of the second half-cycle), the controller 5 turns off the lower switch group of the M stages of the second bridge arm B and turns on at least one switch transistor of the upper switch group of the M stages of the second bridge arm B, so that current flows from the first battery 1, sequentially through the turned-on upper switch transistors of the M stages of the second bridge arm B, the inductors of the M stages 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 inductors of the M stages of the second inductor KM connected to the turned-on upper switch transistors and the second battery 2, thus achieving charging of the inductors of the M stages of the second inductor KM connected to the turned-on upper switch transistors and the second battery 2 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] 7D (i.e., in the second time frame of the second half cycle), the controller 5 controls the upper switch group of the M stages of the second bridge arm B to be turned off and at least one switch transistor of the lower switch group of the M stages of the second bridge arm B to be turned on, so that current flows from the inductors of the M stages of the second inductor KM connected to the turned-on lower switch transistor, flows sequentially through the anode of the second battery 2, the cathode of the second battery 2, and the turned-on lower switch transistors of the M stages of the second bridge arm B, and returns to the inductors of 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, thereby achieving charging of the second battery 2 through the M stages of the second inductor KM.

[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 of Figures 7A to 7D is achieved, and the charging and discharging of the first battery 1 and the charging and discharging of the second battery 2 are completed, i.e., the charging and discharging of the first battery 1 and the second battery 2 are completed, and thus the self-heating of the first battery 1 and the second battery 2 is achieved.

[0083] 8 and 9, the second battery 2 is configured to be connected to the high-voltage load 7. In this case, the second battery 2 can be discharged in various manners. 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 FIG. 10A), i.e., to control the second battery 2 to be directly discharged to the high-voltage load 7. The third preset state is a state in which only the second battery 2 is discharged.

[0084] In another implementation, the controller 5 can 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 FIG. 10B), i.e., to control the second battery 2 to be discharged through the energy transfer circuit 6 to the first battery 1.

[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 control the energy transfer circuit 6 in a third preset state to cause the second battery 2 to charge the first battery 1, i.e., 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 the bridge arm B can also serve as high-voltage loads, i.e., the second battery 2 is discharged to 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 serve as high-voltage loads, i.e., the second battery 2 is discharged to the N stages of the first inductor 4.

[0087] 8 and 9, the first battery 1 can also be discharged in various manners. 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 FIG. 11A), i.e., to control the first battery 1 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 another implementation, the controller 5 can be further configured to control the energy transfer circuit 6 in the fourth preset state to cause the first battery 1 to charge the second battery 2 (as shown in FIG. 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, i.e., 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 serve as high-voltage loads, i.e., the first battery 1 is discharged to 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 serve as high-voltage loads, i.e., the first battery 1 is discharged to the N stages of the first inductor 4.

[0091] 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 to cause the second battery 2 and the first battery 1 to 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 the present disclosure, the first battery 1 and the second battery 2 can power a high voltage load separately or together according to the load input requirements.

[0093] When 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 an instantaneous high-power demand, the first battery 1, which is 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 of the energy transfer circuit 6, which undoubtedly increases costs. The higher the power of the energy transfer circuit 6, the larger the volume and the correspondingly higher the costs. When 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 an instantaneous high-power demand, the second battery 2, which is a power-type battery, needs to supply power to the high-voltage load 7. The second battery 2 directly supplies power to the high-voltage load 7. Therefore, even if the second battery 2 releases high-power energy to the high-voltage load, it does not increase costs. Therefore, 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, the feedback current can be fed back to at least one of the first battery 1 and the second battery 2 to achieve energy recycling. Specifically, for the energy processing device of FIGS. 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 a vehicle braking state.

[0095] In one implementation, the controller 5 may 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 (as shown in FIG. 12A).

[0096] In another implementation, the controller 5 may 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., 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 (as shown in FIG. 12B).

[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, i.e., 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 the present disclosure, the high voltage load 7 can feed back energy to the first battery 1 and the second battery 2 separately or simultaneously according to the actual situation.

[0099] 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] A first end of a switching circuit 9 is connected to the anode of the DC charging port 8. A 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. A first end of a switching device S1 is connected to each stage of the first inductor 4. A second end of the switching device S1 is connected to the anode of the first battery 1.

[0101] 13A and 13B , in one embodiment, the switching circuit 9 includes a first switch S2 and a second switch S3. A first end of the first switch S2 is separately connected to the energy transfer circuit 6 and the positive terminal of the first battery 1. A second end of the first switch S2 is connected to the positive terminal of the DC charging port 8. A first end of the second switch S3 is separately connected to the positive terminal of the second battery 2 and the energy transfer circuit 6. A second end of the second switch S3 is separately connected to the first switch S2 and the positive terminal of the DC charging port 8. When the switching circuit 9 needs to be connected to the positive terminal 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 positive terminal 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 another implementation, the switching circuit 9 may be a single-pole, double-throw switch for selectively connecting to the positive terminal of the first battery 1 and the positive terminal of the second battery 2 .

[0103] In this case, the controller 5 is separately connected to the switching circuit 9 and the switching device S1, and can be further configured to: in a first mode, control the switching circuit 9 to be connected to the anode of the first battery 1 (i.e., control the first switch S2 to be on and the second switch S3 to be off), control the switching device S1 to be off to charge the first battery 1, and 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 simultaneously 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 by using the energy processing device of Figure 13A in the first mode will be described in detail below with reference to Figures 14A to 14C.

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

[0106] Then, in FIG. 14B , the controller 5 controls at least one switch transistor of 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 is in the off state), 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 inductors of the M stages of the second inductor KM connected to the turned-on lower switch transistor to store energy.

[0107] Then, in FIG. 14C, the controller 5 controls the lower switch group of the M stages of the second bridge arm B to be turned off, so that the external power device charges the first battery 1 through the DC charging port 8, and simultaneously 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 by using the energy processing device of FIG. 13B in the first mode will be described in detail below with reference to FIGS. 15A-15B.

[0109] 15A, the controller 5 controls the first switch S2 to be on, the switching device S1 and the second switch S3 to be off, and the upper switch group and the lower switch group of the M stages of the second bridge arm B to be off, i.e., the M stages of the second bridge arm B are inoperative. In this case, the external power supply device charges the first battery 1 only through the DC charging port 8.

[0110] Then, in FIG. 15B, the controller 5 controls at least one switch transistor of 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 is in the off state), 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 inductors of the M stages of the second inductor KM connected to the turned-on upper switch transistor, thus achieving step-down charging of the second battery 2.

[0111] 13A and 13B, the controller 5 is separately connected to the switching circuit 9 and the switching device S1, and can be further configured to, in a second mode, control the switching circuit 9 to be connected to the anode of the second battery 2 (i.e., control the second switch S3 to be on and the first switch S2 to be off), control the switching device S1 to be off to charge the second battery 2, and 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 simultaneously power is 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 by using the energy processing device of Figure 13A in the second mode will be described in detail below with reference to Figures 16A and 16B.

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

[0114] Then, in FIG. 16B, the controller 5 controls at least one switch transistor of 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 is in the off state), 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 inductors of the M stages 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 by using the energy processing device of Figure 13B in the second mode will be described in detail below with reference to Figures 17A to 17C.

[0116] 17A, the controller 5 controls the second switch S3 to be on, the switching device S1 and the first switch S2 to be off, and the upper switch group and the lower switch group of the M stages of the second bridge arm B to be off, i.e., the M stages of the second bridge arm B are inoperative. In this case, the external power supply device charges the second battery 2 only through the DC charging port 8.

[0117] Then, in FIG. 17B, the controller 5 controls at least one switch transistor of 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 is in the off state), 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 inductors of the M stages of the second inductor KM connected to the turned-on lower switch transistor to store energy.

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

[0119] In the present disclosure, the charging process of the first battery 1 and the second battery 2 can be synchronized with the self-heating process of the first battery 1 and the second battery 2 described above, to achieve coordinated self-heating and charging of the batteries.

[0120] It should be understood that although Figures 6A-7D and 9-17C provide illustrations by taking N=3 and M=1 as an example, those skilled in the art will understand that the number of bridge arms and the number of inductors in these figures are merely exemplary.

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

[0122] Optional implementations of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above implementations, and various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and such simple modifications still fall within the protection scope of the present disclosure.

[0123] Furthermore, it should be understood that the various specific technical features described in the above implementations may be consistently combined in any suitable manner, and in order to avoid unnecessary repetition, the various possible combination manners are not described in this disclosure.

[0124] Furthermore, various different implementations of the present disclosure may also be combined in any manner without departing from the concept of the present disclosure, and such combinations shall still be considered as disclosed in the present disclosure.

Claims

1. The battery includes 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 positive pole of the second battery (2) is connected to the first end of each stage of the first bridge arm (3), and the negative pole of the second battery (2) is separately connected to the second end of each stage of the first bridge arm (3) and the negative pole of the first battery (1); a first end of each stage of the first inductor (4) is connected to the midpoint of the corresponding first bridge arm (3), and a second end of each stage of the first inductor (4) is connected to the positive electrode of the first battery (1); The energy processing device, wherein the controller (5) is connected to each stage of a first bridge arm (3) and 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) to achieve self-heating of the first battery (1) and the second battery (2).

2. The controller (5) Controlling the first bridge arm (3) in a first half cycle of a control cycle to discharge the first battery (1) and charge the second battery (2); In a second half cycle of the control cycle, the first bridge arm (3) is controlled to charge the first battery (1) and discharge the second battery (2). The device of claim 1 configured to:

3. The controller (5) During a first time period of the first half cycle, a lower switch group of the at least one stage of a first bridge arm (3) is controlled to be on and an upper switch group of the at least one stage of the first bridge arm (3) is controlled to be off, thereby discharging the first battery (1) and storing energy in the first inductor (4); During a second time period of the first half cycle, the upper switch group of the at least one stage of the first bridge arm (3) is controlled to be on and the lower switch group of the at least one stage of the first bridge arm (3) is controlled to be off, thereby discharging the first battery (1), releasing the energy stored in the first inductor (4), and charging the second battery (2). The device of claim 2 configured to:

4. The controller (5) During a first time period of a second half cycle, controlling an upper switch group of the at least one stage of a first bridge arm (3) to be on and a lower switch group of the at least one stage of the first bridge arm (3) to be off to charge the first battery (1), discharge the second battery, and store energy in the first inductor (4); During a second time period of the second half cycle, the lower switch group of the at least one stage of the first bridge arm (3) is controlled to be on and the upper switch group of the at least one stage of the first bridge arm (3) is controlled to be off to charge the first battery (1) and release the energy stored in the first inductor (4). The device of claim 2 configured to:

5. 2. The device of claim 1, wherein a bridge arm of a motor controller is reused as the first bridge arm (3) and a coil of a motor is reused as the first inductor (4).

6. 2. The device according to claim 1, further comprising an energy transfer circuit (6) arranged between the first battery (1) and the second battery (2), the energy transfer circuit (6) being connected to the controller (5), the energy transfer circuit (6) being configured to achieve energy transfer between the first battery (1) and the second battery (2).

7. The energy transfer circuit (6) At least one stage of second bridge arms (B), wherein a first end of each stage of the second bridge arms (B) is connected to the anode of the second battery (2) and a second end of each stage of the second bridge arms (B) is connected to the cathode of the second battery (2) and the cathode of the first battery (1) separately; at least one stage of a second inductor (KM), wherein a first end of each stage of the second inductor (KM) is connected to the midpoint of a corresponding second bridge arm (B), and a second end of each stage of the second inductor (KM) is connected to the anode of the first battery (1); Equipped with The controller (5) is connected to each stage of the second bridge arm (B), and the controller (5) Controlling 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). The apparatus of claim 6 further configured to:

8. The controller (5) Controlling the second bridge arm (B) in a first half cycle of a control cycle to discharge the first battery (1) and charge the second battery (2); In a second 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 of claim 7 , configured to:

9. The energy transfer circuit (6) At least one stage of second bridge arms (B), wherein a first end of each stage of the second bridge arms (B) is connected to the anode of the first battery (1) and a second end of each stage of the second bridge arms (B) is connected to the cathode of the first battery (1) and the cathode of the second battery (2), respectively; at least one stage of a second inductor (KM), wherein a first end of each stage of the second inductor (KM) is connected to the midpoint of a corresponding second bridge arm (B), and a second end of each stage of the second inductor (KM) is connected to the anode of the second battery (2); Equipped with The controller (5) is connected to each stage of the second bridge arm (B), and the controller (5) Controlling 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). The apparatus of claim 6 further configured to:

10. The controller (5) controlling the second bridge arm (B) in a first half cycle of a control cycle to charge the first battery (1) and discharge the second battery (2); Controlling 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). The apparatus of claim 9 , configured to:

11. a DC charging port (8); a switching circuit (9), a first end of which is connected to the anode of the DC charging port (8) and a second end of which is selectively connected to the anode of the first battery (1) and the anode of the second battery (2); a switching device (S1), a first end of which is connected to each stage of a first inductor (4), and a second end of which is connected to the anode of the first battery (1); 11. The apparatus of claim 7, further comprising:

12. 12. The apparatus of claim 11, 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: in a first mode, control the switching circuit (9) to be connected to the anode of the first battery (1) and control the switching device (S1) to be turned off to charge the first battery (1), and control the second bridge arm (B) to supply power to the second battery (2).

13. 12. The apparatus of claim 11, 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: in a second mode, control the switching circuit (9) to be connected to the anode of the second battery (2) and control the switching device (S1) to be turned off to charge the second battery (2), and control the second bridge arm (B) to supply power to the first battery (1).

14. 2. The device of claim 1, wherein the first battery (1) is an energy type battery and the second battery (2) is a power type battery, and the charge rate and discharge rate of the power type battery are greater than the charge rate and discharge rate of the energy type battery.

15. 9. The apparatus of claim 7 or 8, wherein the controller (5) is further configured to control a 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).

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

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