DEVICE AND METHOD FOR PROCESSING BATTERY AND VEHICLE ENERGY

Abstract

DEVICE AND METHOD FOR PROCESSING BATTERY AND VEHICLE ENERGY. This is a device and method for processing battery and vehicle energy. The device comprises: a first inductor, wherein a first end of the first inductor (L1) is connected to a positive electrode of a battery; a first phase bridge arm (10), wherein a midpoint of the first phase bridge arm (10) is connected to a second end of the first inductor (L1); a second phase bridge arm (20), wherein a midpoint of the second phase bridge arm (20) is connected to a second end of the second inductor (L2); an energy storage element (30), wherein a first end of the energy storage element (30) is connected to a first convergence end and a second end of the energy storage element (30) is connected to a second convergence end;and a controller (40), wherein the controller (40) is configured to control the first phase bridge arm (10) and the second phase bridge arm (20), so that the battery is charged and discharged through the first inductor (L1) and the second inductor (L2) in order to implement heating to the battery, wherein the operating states of the first inductor (L1) and the second inductor (L2) are different.

Description

1 / 37 “BATTERY AND VEHICLE ENERGY PROCESSING DEVICE AND METHOD” CROSS-REFERENCE TO RELATED REQUESTS

[001] The present application claims priority over Patent Application No. CN 202010476447.1, filed by BYD Co., Ltd. on May 29, 2020, and entitled BATTERY ENERGY PROCESSING DEVICE AND METHOD, AND VEHICLE. FIELD

[002] The present disclosure relates to the field of vehicle control and, more specifically, to a battery energy processing device and method and a vehicle. BACKGROUND

[003] In order to solve the current oil energy shortage and reduce urban air pollution, the development of the electric vehicle industry is urgent. As the core power component of an electric vehicle, the charging and discharging performance of the power battery directly determines the driving performance and user experience of the electric vehicle. The discharge capacity of the power battery is greatly reduced in low-temperature environments, which significantly affects the continuous driving range of the electric vehicle. As a result, the charging performance and charging time of the power battery in low-temperature environments cannot be guaranteed. In order to ensure that the power battery operates within a suitable temperature range to guarantee the charging and discharging performance and operational life of the power battery, the power battery needs to be heated when necessary.

[004] A vehicle-mounted high-power electronic device often produces serious electromagnetic interference, leading to the increasingly prevalent problem of electromagnetic compatibility in new power vehicles. Complex circuit topology defects and Petition 870260077171, dated 03 / 08 / 2026, page 58 / 104 2 / 37 Serious electromagnetic interference exists in most techniques related to heating the power supply battery. SUMMARY

[005] One objective of the present disclosure is to provide a battery energy processing device and method and a vehicle with good electromagnetic compatibility.

[006] In order to achieve the objective, the present disclosure provides a battery-powered energy processing device. The device includes:

[007] a first inductor, wherein one end of the first inductor is connected to a positive electrode of a battery;

[008] a second inductor, wherein one end of the second inductor is connected to the positive electrode of the battery;

[009] a first phase bridge arm, in which a midpoint of the first phase bridge arm is connected to a second end of the first inductor;

[010] a second phase bridge arm, wherein a midpoint of the second phase bridge arm is connected to a second end of the second inductor; a first end of the first phase bridge arm and a first end of the second phase bridge arm are connected together to form a first confluent end; a second end of the first phase bridge arm and a second end of the second phase bridge arm are connected together to form a second confluent end; and the second confluent end is connected to a negative electrode of the battery;

[011] an energy storage element, wherein a first end of the energy storage element is connected to the first confluent end; and a second end of the energy storage element is connected to the second confluent end; and

[012] a controller, configured to control the first phase bridge arm and the second phase bridge arm to charge and discharge the battery. Petition 870260077171, dated 03 / 08 / 2026, page 59 / 104 3 / 37 through the first inductor and the second inductor to heat the battery. The first inductor and the second inductor are in different operating states.

[013] Optionally, the operating states include an energy storage state, a free-spinning state, and a non-operating state. The controller is configured to control the first phase-bridge arm and the second phase-bridge arm to charge and discharge the battery and the energy storage element through the first inductor and the second inductor to heat the battery.

[014] Optionally, the controller is configured to control the first phase bridge arm and the second phase bridge arm to discharge the battery or energy storage element to the first inductor to heat the battery, wherein the first inductor is in the energy storage state and the second inductor is in the non-operational state.

[015] Optionally, the controller is configured to control the first phase bridge arm and the second phase bridge arm to discharge one of the battery and the energy storage element to the second inductor and charge the other of the battery and the energy storage element through the first inductor to heat the battery. The second inductor is in the energy storage state and the first inductor is in the free-spinning state.

[016] Optionally, the controller is configured to control the first phase bridge arm and the second phase bridge arm to charge the battery or energy storage element via the second inductor to heat the battery. The second inductor is in the free-spinning state and the first inductor is in the non-operational state.

[017] Optionally, the battery is a vehicle-mounted battery. The first inductor and the second inductor are inductors in a vehicle voltage converter. The first phase bridge arm and the second phase bridge arm are bridge arms in the voltage converter. The energy storage element is a bus capacitor. Petition 870260077171, dated 03 / 08 / 2026, pages 60 / 104 4 / 37

[018] Optionally, the battery is the vehicle-mounted battery. The first phase bridge arm and the second phase bridge arm are bridge arms in a vehicle motor controller. The energy storage element is the bus capacitor.

[019] Optionally, the device additionally includes:

[020] a first switching module, wherein a first end of the first switching module is connected to the positive electrode of the battery; and a second end of the first switching module is connected to the first end of the energy storage element;

[021] a second commutator module, wherein a first end of the second commutator module is connected to the midpoint of the first phase bridge arm; and a second end of the second commutator module is connected to a first phase winding of a motor; and

[022] a third commutator module, wherein a first end of the third commutator module is connected to the midpoint of the second phase bridge arm; and a second end of the third commutator module is connected to a second phase winding of the motor, wherein

[023] the controller is configured to control the first switching module, the second switching module and the third switching module to be switched off in order to warm up the battery.

[024] Optionally, the device additionally includes a fourth switching module. One end of the fourth switching module is connected to the positive electrode of the battery. A second end of the fourth switching module is connected respectively to the first end of the first inductor and to the first end of the second inductor.

[025] The controller is further configured to control the fourth switching module to be switched off and to control the first switching module, the second switching module and the third switching module to be switched on, in order to drive the motor from the battery.

[026] Optionally, the controller is configured to control the first Petition 870260077171, dated 03 / 08 / 2026, pp. 61 / 104 5 / 37 phase bridge arm and the second phase bridge arm to cyclically charge and discharge the battery and energy storage element via the first inductor and the second inductor to heat the battery. The first inductor and the second inductor are in different operating states.

[027] The present disclosure further provides a method for processing battery energy. The method includes:

[028] control a first phase bridge arm and a second phase bridge arm when it is determined that a battery is required to be heated, to charge and discharge the battery through a first inductor and a second inductor to heat the battery, wherein the first inductor and the second inductor are in different operating states;

[029] a first end of the first inductor is connected to a positive electrode of the battery; a first end of the second inductor is connected to the positive electrode of the battery; a midpoint of the first phase bridge arm is connected to a second end of the first inductor; a midpoint of the second phase bridge arm is connected to a second end of the second inductor; a first end of the first phase bridge arm and a first end of the second phase bridge arm are connected together to form a first confluent end; a second end of the first phase bridge arm and a second end of the second phase bridge arm are connected together to form a second confluent end; the second confluent end is connected to a negative electrode of the battery; a first end of an energy storage element is connected to the first confluent end;and a second end of the energy storage element is connected to the second confluent end.

[030] Optionally, the operational states include an energy storage state, a free-spinning state, and a non-operational state.

[031] Control of a first phase bridge arm and a second arm Petition 870260077171, dated 03 / 08 / 2026, page 62 / 104 6 / 37 of phase bridge when it is determined that a battery is required to be heated, to charge and discharge the battery through either the first inductor and a second inductor to heat the battery comprises: controlling the first phase bridge arm and the second phase bridge arm when it is determined that the battery is required to be heated, to charge and discharge the battery and the energy storage element through the first inductor and the second inductor to heat the battery.

[032] Optionally, control of the first phase bridge arm and the second phase bridge arm for charging and discharging the battery and the energy storage element via the first inductor and the second inductor for heating the battery includes:

[033] control the first phase bridge arm and the second phase bridge arm to discharge the battery or energy storage element to the first inductor to heat the battery, wherein the first inductor is in the energy storage state; and the second inductor is in the non-operational state; or

[034] control the first phase bridge arm and the second phase bridge arm to discharge one of the battery and the energy storage element to the second inductor and charge the other of the battery and the energy storage element through the first inductor to heat the battery, wherein the second inductor is in the energy storage state; and the first inductor is in the free-spinning state; or

[035] control the first phase bridge arm and the second phase bridge arm to charge the battery or energy storage element through the second inductor to heat the battery, wherein the second inductor is in the free-spinning state; and the first inductor is in the non-operational state.

[036] Optionally, control of the first phase bridge arm and the second phase bridge arm to charge and discharge the battery and energy storage element via the first inductor and the Petition 870260077171, dated 03 / 08 / 2026, pp. 63 / 104 7 / 37 second inductor includes:

[037] control a lower bridge arm of the first phase bridge arm to be turned on and control an upper bridge arm of the first phase bridge arm and an upper bridge arm and a lower bridge arm of the second phase bridge arm to be turned off, to cause the battery to charge the first inductor;

[038] control the upper bridge arm of the first phase bridge arm and the lower bridge arm of the second phase bridge arm to be connected and control the lower bridge arm of the first phase bridge arm and the upper bridge arm of the second phase bridge arm to be connected, to cause the battery to charge the second inductor and cause the first inductor to charge the energy storage element;

[039] control the upper bridge arm of the second phase bridge arm to be turned on and control the lower bridge arm of the second phase bridge arm and the upper bridge arm and the lower bridge arm of the first phase bridge arm to be turned off, to cause the second inductor to charge the energy storage element;

[040] control the upper bridge arm of the second phase bridge arm to be switched on and control the lower bridge arm of the second phase bridge arm and the upper bridge arm and the lower bridge arm of the first phase bridge arm to be switched off, to cause the energy storage element to charge the battery through the second inductor;

[041] control the upper bridge arm of the first phase bridge arm and the lower bridge arm of the second phase bridge arm to be switched on and control the lower bridge arm of the first phase bridge arm and the upper bridge arm of the second phase bridge arm to be switched off, to cause the energy storage element to charge the battery through the first inductor and cause the second inductor to charge the battery; and Petition 870260077171, dated 03 / 08 / 2026, pp. 64 / 104 8 / 37

[042] control the lower bridge arm of the first phase bridge arm to be turned on and control the upper bridge arm of the first phase bridge arm and the upper bridge arm and the lower bridge arm of the second phase bridge arm to be turned off, so that the first inductor charges the battery.

[043] Optionally, control of the first phase bridge arm and the second phase bridge arm for charging and discharging the battery and energy storage element via the first inductor and the second inductor includes:

[044] control a lower bridge arm of the first phase bridge arm to be turned on and control an upper bridge arm of the first phase bridge arm and an upper bridge arm and a lower bridge arm of the second phase bridge arm to be turned off, to cause the battery to charge the first inductor;

[045] control the upper bridge arm of the first phase bridge arm and the lower bridge arm of the second phase bridge arm to be connected and control the lower bridge arm of the first phase bridge arm and the upper bridge arm of the second phase bridge arm to be connected, to cause the battery to charge the second inductor and cause the first inductor to charge the energy storage element;

[046] control the upper bridge arm of the second phase bridge arm to be turned on and control the lower bridge arm of the second phase bridge arm and the upper bridge arm and the lower bridge arm of the first phase bridge arm to be turned off, to cause the second inductor to charge the energy storage element;

[047] control the upper bridge arm of the first phase bridge arm to be turned on and control the lower bridge arm of the first phase bridge arm and the upper bridge arm and the lower bridge arm of the second phase bridge arm to be turned off, to cause the energy storage element to charge the battery through the first inductor; Petition 870260077171, dated 03 / 08 / 2026, pages 65 / 104 9 / 37

[048] control the lower bridge arm of the first phase bridge arm and the upper bridge arm of the second phase bridge arm to be switched on and control the upper bridge arm of the first phase bridge arm and the lower bridge arm of the second phase bridge arm to be switched off, to cause the energy storage element to charge the battery through the second inductor and cause the first inductor to charge the battery; and

[049] control the lower bridge arm of the second phase bridge arm to be turned on and control the upper bridge arm of the second phase bridge arm and the upper bridge arm and the lower bridge arm of the first phase bridge arm to be turned off, to cause the second inductor to charge the battery.

[050] Optionally, in a stage where one of the first inductor and the second inductor is in the energy storage state and the other is in the free-spinning state, after a bridge arm configured to perform free-spinning of the inductor is controlled to operate, a bridge arm configured to perform energy storage of the inductor is controlled to operate after a delay of a current duration.

[051] Optionally, a switching frequency or duty cycle of the first phase bridge arm and the second phase bridge arm is adjusted during warm-up to cause a value of current flowing through the battery to reach an optimum current value.

[052] Optionally, adjusting the duty cycle of the first phase-bridge arm and the second phase-bridge arm during warm-up to achieve an optimal current value through the battery includes:

[053] adjust a duty cycle of the first phase bridge arm and the second phase bridge arm in a next carrier frequency period during warm-up, according to a comparison result of the current value flowing through the battery and the optimum current value and duty cycle. Petition 870260077171, dated 03 / 08 / 2026, pp. 66 / 104 10 / 37 work of the first phase bridge arm and the second phase bridge arm in a current carrier frequency period, to make the value of the current flowing through the battery reach the optimum current value.

[054] Optionally, adjusting the duty cycle of the first phase-bridge arm and the second phase-bridge arm in a subsequent carrier frequency period during warm-up, according to a comparison result of the current flowing through the battery and the optimum current value and the duty cycle of the first phase-bridge arm and the second phase-bridge arm in a current carrier frequency period, to make the current flowing through the battery reach the optimum current value includes:

[055] during battery charging or discharging, control the first phase bridge arm and the second phase bridge arm so that the duty cycle of the first phase bridge arm and the second phase bridge arm in the next carrier frequency period is greater than the duty cycle in the current carrier frequency period, when the value of the current flowing through the battery is less than the optimum current value; and control the first phase bridge arm and the second phase bridge arm so that the duty cycle of the first phase bridge arm and the second phase bridge arm in the next carrier frequency period is less than the duty cycle in the current carrier frequency period, when the value of the current flowing through the battery is greater than the optimum current value, until the value of the current flowing through the battery reaches the optimum current value.

[056] The present disclosure further provides a vehicle that includes a battery and the battery power processing device provided in the present disclosure.

[057] Through the previous technical solutions, the battery and the energy storage element are charged and discharged through the first inductor and the second inductor, to heat the battery. Furthermore, during the heating of the battery, the first inductor and the second inductor are in Petition 870260077171, dated 03 / 08 / 2026, page 67 / 104 11 / 37 different operating states. Compared to the battery heating control method using one or multiple inductors in the same operating state, the present solution uses a two-inductor switching control method, resulting in a relatively small ripple current in the circuit when the same current is emitted, significantly improving the electromagnetic compatibility performance of the battery power processing device.

[058] Other features and advantages of the present disclosure will be described in detail in the following part of the detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[059] The accompanying drawings are intended to provide further understanding of the present disclosure and constitute a part of this descriptive report. The accompanying drawings and the specific implementations below are used together to explain the present disclosure rather than constituting a limitation to the present disclosure. In the accompanying drawings:

[060] Figure 1 is a structural block diagram of a battery power processing device, according to an exemplary embodiment.

[061] Figure 2 is a schematic structural diagram of a circuit in a battery power processing device, according to an exemplary embodiment.

[062] Figures 3a-3f are, respectively, schematic diagrams of current directions in six stages in one current period, according to an exemplary embodiment.

[063] Figures 4a-4c are, respectively, schematic diagrams of current directions of at least three stages in a current period, according to another exemplary embodiment.

[064] Figure 5 is a schematic structural diagram of a circuit in a battery power processing device, according to another exemplary embodiment. Petition 870260077171, dated 03 / 08 / 2026, pages 68 / 104 12 / 37

[065] Figure 6a is a graph of currents varying with time in a circuit during heating with an inductor, according to an exemplary embodiment.

[066] Figure 6b is a graph of currents varying with time in a circuit during heating with two inductors in the present solution, according to an exemplary embodiment.

[067] Figure 7 is a flowchart of a battery energy processing method, according to an exemplary embodiment.

[068] Figure 8 is a flowchart of a battery energy processing method, according to another exemplary embodiment.

[069] Figure 9 is a structural block diagram of a vehicle, according to an exemplary embodiment.

[070] Figure 10 is a structural block diagram of a vehicle, according to another exemplary embodiment. DETAILED DESCRIPTION

[071] The 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 used merely to describe and explain the present disclosure, but are not intended to limit the present disclosure.

[072] Figure 1 is a structural block diagram of a battery power processing device, according to an exemplary embodiment. The battery power processing device may include a first inductor L1, a second inductor L2, a first phase bridge arm 10, a second phase bridge arm 20, an energy storage element 30 and a controller 40.

[073] One end (one left end) of the first inductor L1 is connected to a positive (+) electrode of a battery. One end (one left end) of the second inductor L2 is connected to the positive electrode of the battery. A midpoint A of the first bridge arm of Petition 870260077171, dated 03 / 08 / 2026, pp. 69 / 104 13 / 37 phase 10 is connected to a second end (a right end) of the first inductor L1. A midpoint B of the second phase 20 bridge arm is connected to a second end (a right end) of the second inductor L2. A first end 10a of the first phase 10 bridge arm and a first end 20a of the second phase 20 bridge arm are connected together to form a first confluent end. A second end 10b of the first phase 10 bridge arm and a second end 20b of the second phase 20 bridge arm are connected together to form a second confluent end. The second confluent end is connected to a negative electrode (—) of the battery.

[074] A first end (an upper end in Figure 1) of the energy storage element 30 is connected to the first confluent end and a second end (an upper end in Figure 1) of the energy storage element 30 is connected to the second confluent end.

[075] Controller 40 is connected respectively to the first phase bridge arm 10 and the second phase bridge arm 20. Controller 40 is configured to control the first phase bridge arm 10 and the second phase bridge arm 20 to charge and discharge the battery via the first inductor L1 and the second inductor L2 to heat the battery. The first inductor L1 and the second inductor L2 are in different operating states.

[076] Figure 2 is a schematic structural diagram of a circuit in a battery power processing device, according to an exemplary embodiment. As shown in Figure 2, the first phase 10 bridge arm includes an upper bridge arm S1 and a lower bridge arm S2, and the second phase 20 bridge arm includes an upper bridge arm S3 and a lower bridge arm S4. In Figure 2, each bridge arm exemplarily includes a triode and a diode connected in parallel. The triode can be additionally replaced with other switching transistors, such as an insulated-gate bipolar transistor (IGBT), a transistor Petition 870260077171, dated 03 / 08 / 2026, pp. 70 / 104 14 / 37 metal-oxide-semiconductor field-effect transistors (MOSFETs) and similar devices. In Figure 2, the energy storage element 30 is shown exemplarily in the form of a capacitor, and the energy storage element 30 can additionally be other types of energy storage elements, such as an inductor.

[077] A first end L1a of the first inductor L1 is connected to a positive (+) electrode of a battery. A first end L2a of the second inductor L2 is connected to the positive electrode of the battery. A midpoint A of the first 10-phase bridge arm is connected to a second end L1b of the first inductor L1. A midpoint B of the second 20-phase bridge arm is connected to a second end L2b of the second inductor L2. A first end 10a of the first 10-phase bridge arm and a first end 20a of the second 20-phase bridge arm are connected together to form a first confluent end. A second end 10b of the first 10-phase bridge arm and a second end 20b of the second 20-phase bridge arm are connected together to form a second confluent end. The second confluent end is connected to a negative (—) electrode of the battery.

[078] In this solution, the first inductor L1 and the second inductor L2 are always in different operating states during battery heating and are, in fact, used as two different inductors. The control method of switching two inductors (between different operating states) in the present solution can perform the role of complementing and restricting each other to a certain extent. The ripple current in the circuit is relatively small and the electromagnetic compatibility is improved. Furthermore, battery heating is caused by the heating of the battery's internal resistance due to the current flowing through the battery when the battery is charged or discharged, and the battery is heated from the inside out. Therefore, the battery heating efficiency is high.

[079] According to the circuit structure diagram shown in Figure Petition 870260077171, dated 03 / 08 / 2026, pp. 71 / 104 15 / 37 2. During battery heating, the battery can be arranged to go through multiple stages with different current flow directions. Correspondingly, the operating states of the two inductors can include an energy storage state, a free-spinning state, and a non-operational state. When the inductors are in the energy storage state, they are charged, and a voltage across both ends of the inductors increases. When the inductors are in the free-spinning state, they discharge, and a voltage across both ends of the inductors decreases. When the inductors are in the non-operational state, they are neither charged nor discharged, and a voltage across both ends of the inductors remains unchanged.

[080] Based on the different previous operating states, specifically, the two inductors are respectively in two of the three states: the energy storage state, the free-spinning state, and the non-operating state. The diversification of optional states not only diversifies configurable current flow strategies, but also allows the comparison of various strategies through experiments and selection of a better current flow strategy with relatively small ripple currents from the various strategies.

[081] In yet another embodiment, the controller 40 is configured to control the first phase bridge arm 10 and the second phase bridge arm 20 to charge and discharge the battery and the energy storage element 30 through the first inductor L1 and the second inductor L2 to heat the battery.

[082] Charging and discharging the battery and energy storage element 30 may include a process of charging the battery and discharging the energy storage element 30 and / or a process of discharging the battery and charging the energy storage element 30.

[083] For example, Figures 3a-3f are, respectively, schematic diagrams of current directions in six stages over a period of Petition 870260077171, dated 03 / 08 / 2026, pp. 72 / 104 16 / 37 current, according to an exemplary modality. In one current period of the modality, the controller can control the first phase bridge arm and the second phase bridge arm to perform the following six steps in six stages, respectively.

[084] 1. A lower bridge arm S2 of the first phase bridge arm is controlled to be switched on and an upper bridge arm S1 of the first phase bridge arm and an upper bridge arm S3 and a lower bridge arm S4 of the second phase bridge arm are controlled to be switched off, to cause the battery to charge the first inductor L1. As shown in Figure 3a, after flowing out of a positive electrode of the battery, the current flows through the first inductor L1 and the lower bridge arm S2 of the first phase bridge arm to a negative electrode of the battery.

[085] 2. The upper bridge arm S1 of the first phase bridge arm and the lower bridge arm S4 of the second phase bridge arm are controlled to be switched on and to control the lower bridge arm S2 of the first phase bridge arm and the upper bridge arm S3 of the second phase bridge arm to be switched on, to cause the battery to charge the second inductor L2 and cause the first inductor L1 to charge the energy storage element 30. As shown in Figure 3b, after flowing out of the positive electrode of the battery, the current flows, in one path, through the first inductor L1, the upper bridge arm S1 of the first phase bridge arm and the energy storage element 30 to the negative electrode of the battery and flows, in another path, through the second inductor L2 and the lower bridge arm S4 of the second phase bridge arm to the negative electrode of the battery.

[086] 3. The upper bridge arm S3 of the second phase bridge arm is controlled to be switched on, and the lower bridge arm S4 of the second phase bridge arm and the upper bridge arm S1 and the lower bridge arm S2 of the first phase bridge arm are controlled to be switched off, to cause the second inductor L2 to charge the energy storage element 30. As shown in Figure 3c, after flowing out of the electrode Petition 870260077171, dated 03 / 08 / 2026, pp. 73 / 104 17 / 37 positive of the battery, the current flows through the second inductor L2, the upper bridge arm S3 of the second phase bridge arm and the energy storage element 30 to the negative electrode of the battery.

[087] 4. The upper bridge arm S3 of the second phase bridge arm is controlled to be switched on and the lower bridge arm S4 of the second phase bridge arm and the upper bridge arm S1 and the lower bridge arm S2 of the first phase bridge arm are controlled to be switched off, to cause the energy storage element 30 to charge the battery through the second inductor L2; As shown in Figure 3d, after flowing out of the negative electrode of the battery, the current flows through the energy storage element 30, the upper bridge arm S3 of the second phase bridge arm and the second inductor L2 to the positive electrode of the battery.

[088] 5. The upper bridge arm S1 of the first phase bridge arm and the lower bridge arm S4 of the second phase bridge arm are controlled to be switched on, and the lower bridge arm S2 of the first phase bridge arm and the upper bridge arm S3 of the second phase bridge arm are controlled to be switched off, to cause the energy storage element 30 to charge the battery through the first inductor L1 and charge the battery through the second inductor L1. As shown in Figure 3e, after flowing out of the negative electrode of the battery, the current flows, in one path, through the energy storage element 30, from the upper bridge arm S1 of the first phase bridge arm and the first inductor L1 to the positive electrode of the battery and flows, in another path, through the lower bridge arm S4 of the second phase bridge arm and the second inductor L2 to the positive electrode of the battery.

[089] 6. The lower bridge arm S2 of the first phase bridge arm is controlled to be switched on, and the upper bridge arm S1 of the first phase bridge arm and the upper bridge arm S3 and lower bridge arm S4 of the second phase bridge arm are controlled to be switched off, in order to charge the battery through the first inductor L1. As shown in Figure Petition 870260077171, dated 03 / 08 / 2026, pp. 74 / 104 18 / 37 3f, after flowing out of the negative electrode of the battery, the current flows through the lower bridge arm S2 of the first phase bridge arm and the first inductor L1 to the positive electrode of the battery.

[090] In this mode, in the previous switching from the third stage to the fourth stage, it is not necessary to control the operations of the bridge arms, but to switch the charging state and then automatically discharge the energy storage element 30. In this way, in a case where the current period has the same number of stages, the control operations by the controller are reduced and the controller control flow is simplified, to heat the battery more reliably.

[091] In another embodiment, the controller can also control six steps to be performed in six stages, respectively. In a current period of the embodiment, the first three stages can be the same as the first three stages in the previous embodiment (Figures 3a-3c). Figures 4a-4c are, respectively, schematic diagrams of current directions of at least three stages in a current period, according to another exemplary embodiment.

[092] In a fourth stage, the upper bridge arm S1 of the first phase bridge arm is controlled to be switched on and the lower bridge arm S2 of the first phase bridge arm and the upper bridge arm S3 and the lower bridge arm S4 of the second phase bridge arm are controlled to be switched off, to cause the energy storage element 30 to charge the battery through the first inductor L1. As shown in Figure 4a, after flowing out of a negative electrode of the battery, the current flows through the energy storage element 30, the upper bridge arm S1 of the second phase bridge arm and the first inductor L1 to the positive electrode of the battery.

[093] In a fifth stage, the lower bridge arm S2 of the first phase bridge arm and the upper bridge arm S3 of the second phase bridge arm are controlled to be linked and the upper bridge arm S1 of Petition 870260077171, dated 03 / 08 / 2026, pp. 75 / 104 19 / 37 The first phase-bridge arm and the lower bridge arm S4 of the second phase-bridge arm are controlled to be switched off, causing the energy storage element 30 to charge the battery through the second inductor L2 and charge the battery through the first inductor L1. As shown in Figure 4b, after flowing out of the negative electrode of the battery, the current flows, in one path, through the energy storage element 30, the upper bridge arm S3 of the first phase-bridge arm and the second inductor L2 to the positive electrode of the battery and flows, in another path, through the lower bridge arm S2 of the second phase-bridge arm and the second inductor L1 to the positive electrode of the battery.

[094] In a sixth stage, the lower bridge arm S4 of the first phase bridge arm is controlled to be switched on and the upper bridge arm S3 of the first phase bridge arm and the upper bridge arm S1 and the lower bridge arm S2 of the second phase bridge arm are controlled to be switched off, in order to charge the battery through the first inductor L1. As shown in Figure 4c, after flowing out of the second inductor L2, the current flows through the battery and the lower bridge arm S4 of the second phase bridge arm to the second inductor L2.

[095] Compared to the previous mode (Figures 3a-3f), in the mode (Figures 3a-3c and Figures 4a-4c), the current period has the same number of steps and the controller actively controls each step, so that the electrical potential energy is relatively large and the battery heating efficiency is relatively high.

[096] In the solution of the present disclosure, the states of the first inductor and the second inductor can have several different combinations. Figures 3a-3c and Figures 4a-4c are used as embodiments of a current period by way of example, wherein the six stages of a current period can include three combinations.

[097] A first combination is that the first inductor is in an energy storage state and the second inductor is in a state Petition 870260077171, dated 03 / 08 / 2026, pp. 76 / 104 20 / 37 non-operational, including the stages of Figure 3a and Figure 4a. The controller is configured to control the first phase-bridge arm and the second phase-bridge arm to discharge the battery or energy storage element 30 to the first inductor L1 to heat the battery. In the stage of Figure 3a, the battery is discharged to the first inductor L1, and in the stage of Figure 4a, the energy storage element 30 is discharged to the first inductor L1.

[098] In this combination, only one inductor is used to store energy. Since the other inductor does not operate, a current flowing through the battery is limited to a certain extent so as not to be excessively large, so that the generated ripple current is relatively small.

[099] A second combination is that the second inductor is in the energy storage state and the first inductor is in a free-spinning state, including the stages of Figure 3b and Figure 4b. The controller is configured to control the first phase bridge arm and the second phase bridge arm to discharge one of the battery and the energy storage element 30 to the second inductor L2 and charge the other of the battery and the energy storage element 30 through the first inductor L1 to heat the battery.

[100] In the stage shown in Figure 3b, the battery is discharged to the second inductor. In the stage shown in Figure 4b, the energy storage element 30 is discharged to the second inductor L2, and the battery is charged through the first inductor L1.

[101] In this combination, one inductor is configured to store energy and the other inductor is configured for free spinning. Although the two inductors operate simultaneously, the two inductors tend to be intertwined and complement each other, and therefore heating efficiency is improved while avoiding relatively large ripple currents.

[102] A third combination is that the second inductor is in the state Petition 870260077171, dated 03 / 08 / 2026, pp. 77 / 104 The 21 / 37 free-spinning stage and the first inductor are in the non-operational state, including the stages in Figure 3c and Figure 4c. The controller is configured to control the first phase-bridge arm and the second phase-bridge arm to charge the battery or energy storage element through the second inductor to heat the battery. In the stage in Figure 3c, the energy storage element is charged through the second inductor. In the stage in Figure 4c, the battery is charged through the second inductor.

[103] In this combination, only one inductor is used for free spinning. Since the other inductor does not operate, the current flowing through the battery is limited to a certain extent so as not to be excessively large, so that the ripple current generated is relatively small.

[104] The circuit structure in Figure 2 can be established as a circuit dedicated to battery heating and can also multiplex circuits in related devices that are in the same device as the battery. For example, the battery is a vehicle-mounted battery. The first inductor and the second inductor are inductors in a vehicle voltage converter. The first phase bridge arm and the second phase bridge arm are bridge arms in the voltage converter. The energy storage element is a bus capacitor. The voltage converter can be a powered direct current (DC) module. In another example, the battery is the vehicle-mounted battery. The first phase bridge arm and the second phase bridge arm are bridge arms in a vehicle motor controller. The energy storage element is the bus capacitor.

[105] Thus, for a device with a similar circuit structure, the circuit in the device can be multiplexed when the device is not in operation, to save hardware layout, reduce circuit connections, save space, not increase the volume of the device, facilitate the miniaturization of the device, not alter the original structure of the vehicle and achieve low battery heating and low solution costs.

[106] When the circuit in other devices is multiplexed, a module Petition 870260077171, dated 03 / 08 / 2026, pp. 78 / 104 22 / 37 switching modules can be arranged in the circuit, and the purpose of switching functions of the multiplexed circuit can be achieved by controlling the opening and closing of the switching module. Figure 5 is a schematic structural diagram of a circuit in a battery power processing device, according to another exemplary embodiment. In the embodiment of Figure 5, the battery is a vehicle-mounted battery, and the circuit in the vehicle's motor controller is multiplexed. Based on Figure 2, the battery power processing device may additionally include a first switching module K1, a second switching module K2, and a third switching module K3.

[107] One end of the first switching module K1 (a left end of K1 in Figure 5) is connected to a positive electrode of the battery and a second end of the first switching module K1 (a right end of K1 in Figure 5) is connected to a first end of the energy storage element 30 (an upper end of the energy storage element 30 in Figure 5).

[108] One end of the second commutator module K2 (a left end of K2 in Figure 5) is connected to a midpoint of a first phase bridge arm 10 and a second end of the second commutator module K2 (a right end of K2 in Figure 5) is connected to a first phase winding of a motor G (not shown).

[109] One end of the third commutator module K3 (a left end of K3 in Figure 5) is connected to a midpoint of a second phase bridge arm 20 and a second end of the third commutator module K3 (a right end of K3 in Figure 5) is connected to a second phase winding of motor G (not shown).

[110] In this mode, the controller is configured to control the first switching module K1, the second switching module K2, and the third switching module K3 to be switched off to warm up the battery. When K1, K2, and K3 are switched off, the first phase 10 bridge arm and the second phase 20 bridge arm stop controlling the motor and are changed to be used for Petition 870260077171, dated 03 / 08 / 2026, pp. 79 / 104 23 / 37 Battery heating. The circuit design and control strategy are relatively simple to achieve fast switching to a battery heating function and obtain high reliability.

[111] As shown in Figure 5, the device may additionally include a fourth switching module K4. One end of the fourth switching module K4 (the left end of K4 in Figure 5) is connected to the positive electrode of the battery and the second end of the fourth switching module K4 (the right end of K4 in Figure 5) is connected respectively to the first end of the first inductor L1 (the left end of L1 in Figure 5) and the first end of the second inductor L2 (the left end of L2 in Figure 5).

[112] In this mode, the controller is further configured to control the fourth switching module K4 to be switched off and to control the first switching module K1, the second switching module K2, and the third switching module K3 to be switched on, in order to drive the motor from the battery. A capacitor C is the bus capacitor. It can be seen from Figure 5 that when K4 is switched off and K1, K2, and K3 are switched on, the first inductor L1 and the second inductor L2 are switched off in the circuit and the motor control G can be performed via the three-phase bridge arm. That is, the circuit is switched to function as a motor controller. The design and control strategy of the switching circuit are relatively simple. The switching circuit can perform fast switching to a motor drive function and is highly reliable.

[113] The previous embodiments describe the operations of the bridge arms, current flow directions, and charge and discharge states in a current period. In yet another embodiment, the controller can be configured to control the first phase bridge arm and the second phase bridge arm to cyclically charge and discharge the battery and the energy storage element through the first inductor and the second inductor to heat the battery. The first inductor and the second inductor Petition 870260077171, dated 03 / 08 / 2026, pages 80 / 104 24 / 37 are in different operating states. That is, the previous current period can be carried out cyclically until a condition to stop battery heating is reached. The condition to stop battery heating could be, for example, that the battery temperature reaches a predetermined temperature limit.

[114] In this mode, the predetermined steps are performed cyclically to achieve the purpose of continuously charging the battery. In addition, the control strategy is simple, not susceptible to errors and has high reliability.

[115] Figure 6a is a graph of currents varying with time in a circuit during heating with one inductor, according to an exemplary embodiment. Figure 6b is a graph of currents varying with time in a circuit during heating with two inductors in the present solution, according to an exemplary embodiment. The abscissa is time and the ordinate is the current in the circuit, that is, the current flowing through the power supply battery. As shown in Figure 6a and Figure 6b, when only one inductor is used for heating, the ripple current on the curve is relatively large, while when two inductors are used for heating, the ripple current on the curve is obviously smaller than on the curve when only one inductor is used.It can be seen that when the solution of the present disclosure is used to heat the battery, a ripple current in the circuit is relatively small when an equal current is emitted, significantly improving the electromagnetic compatibility performance of the battery power processing device.

[116] The present disclosure further provides a method for processing battery power. Figure 7 is a flowchart of a method for processing battery power, according to an exemplary embodiment. As shown in Figure 7, the method may include step S71 of controlling a first phase bridge arm and a second phase bridge arm when it is determined that a battery is required to be Petition 870260077171, dated 03 / 08 / 2026, pages 81 / 104 25 / 37 heated, to charge and discharge the battery through a first inductor and a second inductor to heat the battery. The first inductor and the second inductor are in different operating states.

[117] One end of the first inductor is connected to a positive electrode of the battery. One end of the second inductor is connected to the positive electrode of the battery. A midpoint of the first phase bridge arm is connected to a second end of the first inductor. A midpoint of the second phase bridge arm is connected to a second end of the second inductor. One end of the first phase bridge arm and one end of the second phase bridge arm are connected together to form a first confluent end. One end of the first phase bridge arm and one end of the second phase bridge arm are connected together to form a second confluent end. The second confluent end is connected to a negative electrode of the battery. One end of an energy storage element is connected to the first confluent end.A second end of the energy storage element is connected to the second confluent end.

[118] In this solution, the first inductor and the second inductor are always in different operating states during battery heating and are, in fact, used as two different inductors. Compared to the battery heating control method using one inductor or multiple inductors in the same operating state, the control method of switching two inductors (between different operating states) in this solution can perform the role of complementing and restricting each other to a certain extent. The ripple current in the circuit is relatively small when the same current is emitted, significantly improving the electromagnetic compatibility performance of the battery power processing device.

[119] Optionally, the operating states of the two inductors may include an energy storage state, a free-spinning state and a Petition 870260077171, dated 03 / 08 / 2026, pages 82 / 104 26 / 37 non-operational state. The step (step S71) of controlling the first phase bridge arm and the second phase bridge arm when it is determined that the battery is required to be heated, to charge and discharge the battery through the first inductor and the second inductor to heat the battery may include: controlling the first phase bridge arm and the second phase bridge arm when it is determined that the battery is required to be heated, to charge and discharge the battery and the energy storage element through the first inductor and the second inductor to heat the battery.

[120] Based on the different previous operating states, specifically, the two inductors are respectively in two of the three states: the energy storage state, the free-spinning state, and the non-operating state. The diversification of optional states not only diversifies configurable current flow strategies, but also allows comparison of various strategies through experiments and selection of a better current flow strategy with relatively small ripple currents from the various strategies.

[121] Optionally, the step of controlling the first phase bridge arm and the second phase bridge arm to charge and discharge the battery and energy storage element through the first inductor and the second inductor to heat the battery may include: controlling the first phase bridge arm and the second phase bridge arm to discharge the battery or energy storage element to the first inductor to heat the battery, wherein the first inductor is in the energy storage state and the second inductor is in the non-operational state; or

[122] may include: controlling the first phase bridge arm and the second phase bridge arm to discharge one of the battery and the energy storage element to the second inductor and the other from the battery and charge the energy storage element through the first inductor to heat the battery, wherein the second inductor is in the energy storage state; and the first inductor is in the free-spinning state; or Petition 870260077171, dated 03 / 08 / 2026, pages 83 / 104 27 / 37

[123] may include controlling the first phase bridge arm and the second phase bridge arm to charge the battery or energy storage element via the second inductor to heat the battery, wherein the second inductor is in the free-spinning state; and the first inductor is in the non-operational state.

[124] When one inductor operates and the other does not, a current flowing through the battery is limited to a certain extent so as not to be excessively large, so that the ripple current generated is relatively small. When one inductor is configured to store energy and the other inductor is configured for free spinning, although the two inductors operate simultaneously, the two inductors tend to be intertwined and complement each other and therefore the heating efficiency is improved while avoiding relatively large ripple currents.

[125] Optionally, the control step of the first phase bridge arm and the second phase bridge arm for charging and discharging the battery and energy storage element through the first inductor and the second inductor may include the following steps:

[126] 1. A lower bridge arm of the first phase bridge arm is controlled to be switched on and an upper bridge arm of the first phase bridge arm and an upper bridge arm and a lower bridge arm of the second phase bridge arm are controlled to be switched off, to cause the battery to charge the first inductor.

[127] 2. The upper bridge arm of the first phase bridge arm and the lower bridge arm of the second phase bridge arm are controlled to be switched on, and the lower bridge arm of the first phase bridge arm and the upper bridge arm of the second phase bridge arm are controlled to be switched off, so that the battery charges the second inductor and charges the energy storage element through the first inductor.

[128] 3. The upper bridge arm of the second phase bridge arm is controlled to be switched on, and the lower bridge arm of the second phase bridge arm is controlled to be switched off. Petition 870260077171, dated 03 / 08 / 2026, pages 84 / 104 Phase 28 / 37 and the upper and lower bridge arms of the first phase bridge arm are controlled to be switched off, to cause the energy storage element to charge the battery through the second inductor;

[129] 4. The upper bridge arm of the second phase bridge arm is controlled to be switched on and the lower bridge arm of the second phase bridge arm and the upper and lower bridge arms of the first phase bridge arm are controlled to be switched off, to cause the energy storage element to charge the battery through the second inductor;

[130] 5. The upper bridge arm of the first phase bridge arm and the lower bridge arm of the second phase bridge arm are controlled to be switched on and the lower bridge arm of the first phase bridge arm and the upper bridge arm of the second phase bridge arm are controlled to be switched off, so that the energy storage element charges the battery through the first inductor and charges the battery through the second inductor.

[131] 6. The lower bridge arm of the first phase bridge arm is controlled to be switched on and the upper bridge arm of the first phase bridge arm and the upper and lower bridge arms of the second phase bridge arm are controlled to be switched off, in order to charge the battery through the first inductor.

[132] In this mode, in the previous switching from the third stage to the fourth stage, it is not necessary to control the bridge arm operations, but to switch the charging state and then automatically discharge the energy storage element. In this way, in a case where the current period has the same number of stages, the control operations by the controller are reduced and the controller control flow is simplified, to heat the battery more reliably.

[133] Optionally, the control stage of the first bridge arm of Petition 870260077171, dated 03 / 08 / 2026, pages 85 / 104 The 29 / 37 phase and the second phase bridge arm for charging and discharging the battery and energy storage element through the first inductor and the second inductor may include the following steps:

[134] 1. A lower bridge arm of the first phase bridge arm is controlled to be switched on and an upper bridge arm of the first phase bridge arm and an upper bridge arm and a lower bridge arm of the second phase bridge arm are controlled to be switched off, to cause the battery to charge the first inductor.

[135] 2. The upper bridge arm of the first phase bridge arm and the lower bridge arm of the second phase bridge arm are controlled to be switched on, and the lower bridge arm of the first phase bridge arm and the upper bridge arm of the second phase bridge arm are controlled to be switched on, so that the battery charges the second inductor and the first inductor charges the energy storage element.

[136] 3. The upper bridge arm of the second phase bridge arm is controlled to be switched on, and the lower bridge arm of the second phase bridge arm and the upper and lower bridge arms of the first phase bridge arm are controlled to be switched off, so that the second inductor charges the energy storage element.

[137] 4. The upper bridge arm of the first phase bridge arm is controlled to be switched on and the lower bridge arm of the first phase bridge arm and the upper and lower bridge arms of the second phase bridge arm are controlled to be switched off, to cause the energy storage element to charge the battery through the first inductor;

[138] 5. The lower bridge arm of the first phase bridge arm and the upper bridge arm of the second phase bridge arm are controlled to be switched on and the upper bridge arm of the first phase bridge arm and the lower bridge arm of the second phase bridge arm are controlled to be switched off, to cause the storage element to Petition 870260077171, dated 03 / 08 / 2026, pages 86 / 104 30 / 37 energy charge the battery through the second inductor and charge the battery through the first inductor.

[139] 6. The lower bridge arm of the first phase bridge arm is controlled to be switched on and the upper bridge arm of the first phase bridge arm and the upper bridge arm and the lower bridge arm of the second phase bridge arm are controlled to be switched off, in order to charge the battery through the second inductor.

[140] In this mode, the controller actively controls each stage, so that the electrical potential energy is relatively high and the heating efficiency of the battery is relatively high.

[141] With regard to the method in the previous embodiments, a specific way in which the operation is performed at each stage was described in detail in the device-related embodiments and the details will not be described in the present document.

[142] In yet another embodiment, in a stage where one of the first inductor and the second inductor is in the energy storage state and the other is in the free-spinning state, after a bridge arm configured to perform the free-spinning of the inductor is controlled to operate, a bridge arm configured to perform the energy storage of the inductor is controlled to operate after a delay of a current duration.

[143] The current duration can be set according to a switching period of a switching transistor in the bridge arm. For example, the current duration can be half a period of the switching transistor in the bridge arm.

[144] For example, in the stage of Figure 3b, it is necessary to control the lower bridge arm S2 of the first phase bridge arm configured to perform free rotation of the first inductor L1 to be switched off and control the lower bridge arm S4 of the second phase bridge arm configured to perform energy storage of the second inductor L2 to be switched on. Then, the lower bridge arm S2 of the first phase bridge arm is controlled to Petition 870260077171, dated 03 / 08 / 2026, pages 87 / 104 31 / 37 is switched off and, after switching off, the lower bridge arm S4 of the second phase bridge arm is controlled to be switched on after a half-period of the switching transistor in the bridge arm.

[145] In another example, in the stage of Figure 3e, it is necessary to control the upper bridge arm S1 of the first phase bridge arm configured to perform the energy storage of the first inductor L1 to be turned on and control the upper bridge arm S3 of the second phase bridge arm configured to perform the free rotation of the second inductor L2 to be turned off. Then, the upper bridge arm S3 of the second phase bridge arm is controlled to be turned off and, after turning off, the upper bridge arm S1 of the first phase bridge arm is controlled to be turned on after a half-period of the switching transistor in the bridge arm.

[146] Through the previous delay operation, the bridge arms are alternately switched, so that the other inductor starts to store energy after the free spin of one inductor starts for a period of time. In this way, the current impact can be reduced and the electrical charge can be transferred slowly, which is in line with the charging and discharging characteristics of the inductors and can help to extend the service life of the device.

[147] In yet another embodiment, a switching frequency or duty cycle of the first phase bridge arm and the second phase bridge arm can be adjusted during warm-up to cause a value of current flowing through the battery to reach an ideal current value.

[148] The optimum current value is an ideal value of a current flowing through the battery considering the characteristics of the battery and the circuit. When the first phase bridge arm and the second phase bridge arm are bridge arms in the voltage converter, the optimum current value may be the lower of the maximum allowable current value of the battery and the maximum allowable current value of the voltage converter.

[149] The maximum permissible current value of the battery is related to factors such as battery SOC, temperature, alternating frequency, voltage, Petition 870260077171, dated 03 / 08 / 2026, pages 88 / 104 32 / 37 capacity for new discharge in individual period, and similar. The maximum permissible current value of the voltage converter is mainly limited by the junction temperature of an IGBT module chip and the temperature of an inductor coil sensor. According to the IGBT chip temperature of the current collected by the message, the current temperature collected by the inductor coil sensor and a torque limiting temperature of the IGBT chip and the inductor coil sensor, the maximum permissible current of the voltage converter can be obtained by viewing the table.

[150] Specifically, the optimum current value can be obtained using the following formula:

[151] I(f)= min (I_max1, I_max2)

[152] I_max1=C*f

[153] I_max2=(U_max-OCV) / (R_ac (f))

[154] I(f) is the optimum current value, I_max1 is the maximum allowable current value of the battery, I_max2 is the maximum allowable current value of the voltage converter, min is the minimum value, C is the capacity that cannot be exceeded during pulse charging and discharging in one cycle, f is an alternating frequency of the battery, U_max is the maximum voltage of the battery, OCV is an open circuit voltage and R_ac (f) is a function of the internal AC resistance of the battery that varies with f.

[155] In this mode, by adjusting the switching frequency or duty cycle of the first phase bridge arm and the second phase bridge arm, the current value flowing through the battery reaches the optimum current value, which uses a simple method to gradually maximize the battery heating efficiency, the control is simple and the reliability is high.

[156] In yet another embodiment, the step of adjusting a duty cycle of the first phase-bridge arm and the second phase-bridge arm during warm-up to cause a value of current flowing through the battery to reach an optimum current value may include:

[157] adjust the duty cycle of the first phase bridge arm and the Petition 870260077171, dated 03 / 08 / 2026, pages 89 / 104 33 / 37 second phase bridge arm in a subsequent carrier frequency period during warm-up, according to a comparison result of the current flowing through the battery and the optimum current value and the duty cycle of the first phase bridge arm and the second phase bridge arm in a current carrier frequency period, to make the current flowing through the battery reach the optimum current value.

[158] That is, the duty cycle of the first phase bridge arm and the second phase bridge arm in each carrier frequency period is to be adjusted according to the duty cycle in the previous carrier frequency period to gradually obtain the optimum duty cycle (corresponding to the ideal current value). In this way, the duty cycle adjustment frequency is relatively high, to quickly obtain the optimum duty cycle and the optimum current value and rapidly improve the heating efficiency of the battery.

[159] In yet another embodiment, the step of adjusting the duty cycle of the first phase-bridge arm and the second phase-bridge arm in a subsequent carrier frequency period during warm-up, according to a comparison result of the current flowing through the battery and the optimum current value and the duty cycle of the first phase-bridge arm and the second phase-bridge arm in a current carrier frequency period, to make the current flowing through the battery reach the optimum current value includes:

[160] during battery charging or discharging, control the first phase-bridge arm and the second phase-bridge arm to make the duty cycle of the first phase-bridge arm and the second phase-bridge arm in the next carrier frequency period greater than the duty cycle in the current carrier frequency period, when the value of the current flowing through the battery is less than the optimum current value; and control the first phase-bridge arm and the second phase-bridge arm to make the duty cycle of the first phase-bridge arm and the second phase-bridge arm in the next carrier frequency period less Petition 870260077171, dated 03 / 08 / 2026, pages 90 / 104 34 / 37 that the duty cycle in the current carrier frequency period, when the value of the current flowing through the battery is greater than the optimum current value, until the value of the current flowing through the battery reaches the optimum current value.

[161] That is, through closed-loop duty cycle control, the current in the circuit is finally at the optimum current value (or heating is stopped before reaching the optimum current value due to the fact that the heating stop condition is satisfied). Specifically, an initial duty cycle can be predetermined and the step size for adjusting the duty cycle can be predetermined. In the closed-loop duty cycle control process, the initial duty cycle and step size can be used to adjust the duty cycle in the next carrier frequency period.In this way, the safety of the battery-powered processing device can be ensured, heating efficiency can be improved, and heating time can be shortened.

[162] Figure 8 is a flowchart of a battery energy processing method, according to an exemplary embodiment. As shown in Figure 8, before battery self-heating, a battery management system can collect a battery temperature T, when the temperature T is less than a set temperature value Tmin, the battery SOC is collected. When it is determined that the collected SOC is greater than the set SOCmin, heating is initiated. Alternatively, when the collected SOC is less than SOCmin, heating is not performed. The battery self-heating procedure can only be initiated when the sample temperature T and the sample SOC simultaneously satisfy the requirements, i.e., T < Tmin and the sample SOC is greater than SOCmin. For example, Tmin can be minus 10°C and can be 10%.Furthermore, when the maximum temperature difference between cells is considered, the collected battery temperature can be an average value from multiple monitoring points.

[163] When the self-heating procedure is initiated, one direction. Petition 870260077171, dated 03 / 08 / 2026, pages 91 / 104 35 / 37 of a current flow can be determined first. When the battery charges the energy storage element, the current value is greater than 0 and S2 and S4 are controlled to control the battery to discharge. When the energy storage element charges the battery, the battery current value is less than 0, S1 and S3 are controlled to control the current to charge.

[164] After the warm-up procedure is initiated, the initial duty cycle is set to D0, in a case where the switching frequency of the voltage converter IGBT and the alternating carrier frequency of the battery are determined. When the current value is greater than 0, the battery charges the energy storage element during that time and S2 is controlled to be switched on and the duty cycle is D0. After a half-period delay, S4 is controlled to be switched on and the duty cycle is D0. In addition, the current value in the circuit is collected at the same time. When the current value is less than the optimum current value, in the next carrier frequency period, S2 is switched on and the duty cycle is DO+ΔT. After a half-period delay, S4 is switched on and the duty cycle is DO+ΔT. When the current value is greater than the optimum current value, in the next carrier frequency period, S2 is controlled to be switched on and the duty cycle is DO-ΔT.After a half-cycle delay, S4 is controlled to turn on and the duty cycle is Do-Δε. After the duty cycle is set, the battery temperature T needs to be collected again and is determined when the battery temperature T reaches the set temperature value Tmin. When the battery current value is less than 0, the methods for controlling S1 and S3 are similar.

[165] The present disclosure further provides a vehicle. Figure 9 is a structural block diagram of a vehicle according to an exemplary embodiment. As shown in Figure 9, the vehicle may include a battery 100 and the previous battery power processing device 200 provided in the present disclosure. Petition 870260077171, dated 03 / 08 / 2026, pages 92 / 104 36 / 37

[166] Figure 10 is a structural block diagram of a vehicle, according to another exemplary embodiment. In this embodiment, the vehicle is a hybrid vehicle. As shown in Figure 10, the vehicle may include a battery 100, a voltage converter 300, a bus capacitor 30, a drive motor G1, a drive motor control bridge arm 400, a generator G2, and a generator control bridge arm 500. The previous battery power processing device 200 includes a voltage converter 300 and a bus capacitor 30. The voltage converter 300 includes a first inductor L1, a second inductor L2, and a two-phase bridge arm.A first confluent end of the two-phase bridge arm in the voltage converter 300 is also a first confluent end of the drive motor control bridge arm 400 and the generator control bridge arm 500, and a second confluent end of the two-phase bridge arm in the voltage converter 300 is also a second confluent end of the drive motor control bridge arm 400 and the generator control bridge arm 500.

[167] Preferred implementations of the present disclosure are described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above implementations. Various simple variations may be made to the technical solutions of the present disclosure within the scope of the technical idea of ​​the present disclosure and such simple variations shall fall within the scope of protection of the present disclosure.

[168] It should be further noted that the specific technical features described in the aforementioned specific implementations can be combined in any suitable manner in a conflict-free case. To avoid unnecessary repetition, various possible combination methods are not described in the present disclosure.

[169] Furthermore, different implementations of the present disclosure may also be arbitrarily combined without departing from the idea of Petition 870260077171, dated 03 / 08 / 2026, pages 93 / 104 37 / 37 present revelation, and these combinations should be considered as content revealed in the present revelation. Petition 870260077171, dated 03 / 08 / 2026, pages 94 / 104

Claims

1 / 10 CLAIMS 1. Battery power processing device, characterized by comprising: a first inductor (L1), wherein a first end of the first inductor (L1) is connected to a positive electrode (+) of a battery; a second inductor (L2), wherein a first end of the second inductor (L2) is connected to the positive electrode of the battery; a first phase bridge arm (10), wherein a midpoint (A) of the first phase bridge arm (10) is connected to a second end of the first inductor (L1); a second phase bridge arm (20), wherein a midpoint (B) of the second phase bridge arm (20) is connected to a second end of the second inductor (L2); a first end (10a) of the first phase bridge arm (10) and a first end (20a) of the second phase bridge arm (20) are connected together to form a first confluent end;a second end (10b) of the first phase bridge arm (10) and a second end (20b) of the second phase bridge arm (20) are connected together to form a second confluent end; and the second confluent end is connected to a negative electrode (-) of the battery; an energy storage element (30), wherein a first end of the energy storage element (30) is connected to the first confluent end and a second end of the energy storage element (30) is connected to the second confluent end; and a controller (40), configured to control the first phase bridge arm (10) and the second phase bridge arm (20) to charge and discharge the battery through the first inductor (L1) and the second inductor (L2) to heat the battery and the first inductor (L1) and the second inductor (L2) are in different Petition 870260077171, dated 03 / 08 / 2026, page. 95 / 104 2 / 10 operational states.

2. Device according to claim 1, characterized in that the operating states comprise an energy storage state, a free-spinning state and a non-operating state; and the controller (40) is configured to control the first phase bridge arm (10) and the second phase bridge arm (20) to charge and discharge the battery and the energy storage element (30) through the first inductor (L1) and the second inductor (L2) to heat the battery.

3. Device according to claim 2, characterized in that the controller (40) is configured to control the first phase bridge arm (10) and the second phase bridge arm (20) to discharge the battery or energy storage element (30) to the first inductor (L1) to heat the battery; wherein the first inductor (L1) is in the energy storage state; and the second inductor (L2) is in the non-operational state.

4. Device according to claim 3, characterized in that the controller (40) is configured to control the first phase bridge arm (10) and the second phase bridge arm (20) to discharge one of the battery and energy storage element (30) to the second inductor (L2) and charge the other of the battery and energy storage element (30) through the first inductor (L1) to heat the battery, wherein the second inductor (L2) is in the energy storage state; and the first inductor (L1) is in the free-spinning state.

5. Device according to claim 4, characterized in that the controller (40) is configured to control the first phase bridge arm (10) and the second phase bridge arm (20) to charge the battery or energy storage element (30) through the second inductor (L2) to heat the battery, wherein the second inductor (L2) is in the free-spinning state; and the first inductor (L1) is in the non-operational state.

6. Device according to any one of claims 1 to 5, Petition 870260077171, dated 03 / 08 / 2026, page 96 / 104 3 / 10 characterized in that the battery is a vehicle-mounted battery; the first inductor (L1) and the second inductor (L2) are inductors in a vehicle voltage converter; the first phase bridge arm (10) and the second phase bridge arm (20) are bridge arms in the voltage converter; and the energy storage element (30) is a bus capacitor.

7. Device according to any one of claims 1 to 6, characterized in that the battery is a vehicle-mounted battery; the first phase bridge arm (10) and the second phase bridge arm (20) are bridge arms in a vehicle motor controller (40); and the energy storage element (30) is the bus capacitor.

8. Device according to claim 7, characterized by further comprising: a first commutator module (K1), wherein a first end of the first commutator module (K1) is connected to the positive electrode of the battery; and a second end of the first commutator module (K1) is connected to the first end of the energy storage element (30); a second commutator module (K2), wherein a first end of the second commutator module (K2) is connected to the midpoint of the first phase bridge arm (10); and a second end of the second commutator module (K2) is connected to a first phase winding of a motor (G); and a third commutator module (K3), wherein a first end of the third commutator module (K3) is connected to the midpoint of the second phase bridge arm (20); a second end of the third commutator module (K3) is connected to a second phase winding of the motor (G);and wherein the controller (40) is configured to control the first switching module (K1), the second switching module (K2) and the third switching module (K3) to be switched off in order to warm up the battery.; 9. Device according to claim 8, characterized by comprising a fourth switching module (K4), wherein a first end of the fourth switching module (K4) is connected to the positive electrode of the battery; a second end of the fourth switching module (K4) is connected respectively to the first end of the first inductor (L1) and to the first end of the second inductor (L2); the controller (40) is further configured to control the fourth switching module (K4) to be switched off and to control the first switching module (K1), the second switching module (K2) and the third switching module (K3) to be switched on, in order to drive the motor from the battery.

10. Device, according to any one of claims 2 to 9, characterized in that the controller (40) is configured to control the first phase bridge arm (10) and the second phase bridge arm (20) to cyclically charge and discharge the battery and the energy storage element (30) through the first inductor (L1) and the second inductor (L2) to heat the battery, wherein the first inductor (L1) and the second inductor (L2) are in different operating states.

11. Battery energy processing method, characterized by comprising: controlling a first phase bridge arm (10) and a second phase bridge arm (20) when it is determined that a battery is required to be heated, to charge and discharge the battery through a first inductor (L1) and a second inductor (L2) to heat the battery, wherein the first inductor (L1) and the second inductor (L2) are in different operating states (S71), wherein a first end of the first inductor (L1) is connected to a positive electrode of the battery; a first end of the second inductor (L2) is connected to the positive electrode of the battery; a midpoint of the first phase bridge arm (10) is connected to a second end of the first inductor (L1); a midpoint of the second phase bridge arm (20) is connected to a second end of the second inductor (L2);a first end of the first phase bridge arm (10) and a first end of the second phase bridge arm (20) are connected together to form Petition 870260077171, dated 03 / 08 / 2026, page 98 / 104 5 / 10 a first confluent end; a second end of the first phase bridge arm (10) and a second end of the second phase bridge arm (20) are connected together to form a second confluent end; the second confluent end is connected to a negative electrode of the battery; a first end of an energy storage element (30) is connected to the first confluent end; and a second end of the energy storage element (30) is connected to the second confluent end.

12. Method according to claim 11, characterized in that the operating states comprise an energy storage state, a free-spinning state and a non-operating state; the control of a first phase bridge arm (10) and a second phase bridge arm (20) when it is determined that a battery is required to be heated, to charge and discharge the battery through the first inductor (L1) and a second inductor (L2) to heat the battery comprises: controlling the first phase bridge arm (10) and the second phase bridge arm (20) when it is determined that the battery is required to be heated, to charge and discharge the battery and the energy storage element (30) through the first inductor (L1) and the second inductor (L2) to heat the battery.

13. Method according to claim 12, characterized by controlling the first phase bridge arm (10) and the second phase bridge arm (20) to charge and discharge the battery and the energy storage element (30) through the first inductor (L1) and the second inductor (L2) to heat the battery, comprising: controlling the first phase bridge arm (10) and the second phase bridge arm (20) to discharge the battery or the energy storage element (30) to the first inductor (L1) to heat the battery, wherein the first inductor (L1) is in the energy storage state; and the second inductor (L2) is in the non-operational state; or Petition 870260077171, dated 03 / 08 / 2026, p.99 / 104 6 / 10 control the first phase bridge arm (10) and the second phase bridge arm (20) to discharge one of the battery and the energy storage element (30) to the second inductor (L2) and charge the other of the battery and the energy storage element (30) through the first inductor (L1) to heat the battery, wherein the second inductor (L2) is in the energy storage state; and the first inductor (L1) is in the free-spinning state; or control the first phase bridge arm (10) and the second phase bridge arm (20) to charge the battery or the energy storage element (30) through the second inductor (L2) to heat the battery, wherein the second inductor (L2) is in the free-spinning state; and the first inductor (L1) is in the non-operational state.

14. Method, according to any one of claims 11 to 13, characterized by the control of the first phase bridge arm (10) and the second phase bridge arm (20) for charging and discharging the battery and the energy storage element (30) through the first inductor (L1) and the second inductor (L2) comprising: controlling a lower bridge arm (S2) of the first phase bridge arm (10) to be switched on and controlling an upper bridge arm (S1) of the first phase bridge arm (10) and an upper bridge arm (S3) and a lower bridge arm (S4) of the second phase bridge arm (20) to be switched off, to cause the battery to charge the first inductor (L1);control the upper bridge arm (S1) of the first phase bridge arm (10) and the lower bridge arm of the second phase bridge arm (20) to be switched on and control the lower bridge arm of the first phase bridge arm (10) and the upper bridge arm (S3) of the second phase bridge arm (20) to be switched on, to cause the battery to charge the second inductor (L2) and cause the first inductor (L1) to charge the energy storage element (30); control the upper bridge arm (S3) of the second phase bridge arm (20) Petition 870260077171, dated 03 / 08 / 2026, page. 100 / 104 7 / 10 to be switched on and control the lower bridge arm of the second phase bridge arm (20) and the upper bridge arm (S1) and the lower bridge arm (S2) of the first phase bridge arm (10) to be switched off, to cause the second inductor (L2) to charge the energy storage element (30);control the upper bridge arm (S3) of the second phase bridge arm (20) to be switched on and control the lower bridge arm of the second phase bridge arm (20) and the upper bridge arm (S1) and the lower bridge arm (S2) of the first phase bridge arm (10) to be switched off, to cause the energy storage element (30) to charge the battery through the second inductor (L2); control the upper bridge arm (S1) of the first phase bridge arm (10) and the lower bridge arm (S4) of the second phase bridge arm (20) to be switched on and control the lower bridge arm (S2) of the first phase bridge arm (10) and the upper bridge arm (S3) of the second phase bridge arm (20) to be switched off, to cause the energy storage element (30) to charge the battery through the first inductor (L1) and cause the second inductor (L2) to charge the battery;and control the lower bridge arm (S2) of the first phase bridge arm (10) to be turned on and control the upper bridge arm (S1) of the first phase bridge arm (10) and the upper bridge arm (S3) and the lower bridge arm (S4) of the second phase bridge arm (20) to be turned off, so that the first inductor (L1) charges the battery.; 15. Method, according to any one of claims 11 to 14, characterized by the control of the first phase bridge arm (10) and the second phase bridge arm (20) for charging and discharging the battery and energy storage element (30) through the first inductor (L1) and the second inductor (L2) comprising: controlling a lower bridge arm (S2) of the first phase bridge arm (10) to be switched on and controlling an upper bridge arm (S1) of the first phase bridge arm (10) and an upper bridge arm (S3) and a lower bridge arm Petition 870260077171, dated 03 / 08 / 2026, p. 101 / 104 8 / 10 (S4) of the second phase bridge arm (20) to be switched off, to cause the battery to charge the first inductor (L1);control the upper bridge arm (S1) of the first phase bridge arm (10) and the lower bridge arm (S4) of the second phase bridge arm (20) to be switched on and control the lower bridge arm (S2) of the first phase bridge arm (10) and the upper bridge arm (S3) of the second phase bridge arm (20) to be switched on, to cause the battery to charge the second inductor (L2) and cause the first inductor (L1) to charge the energy storage element (30); control the upper bridge arm (S3) of the second phase bridge arm (20) to be switched on and control the lower bridge arm (S4) of the second phase bridge arm (20) and the upper bridge arm (S1) and the lower bridge arm (S2) of the first phase bridge arm (10) to be switched off, to cause the second inductor (L2) to charge the energy storage element (30);to control the upper bridge arm of the first phase bridge arm (10) to be switched on and to control the lower bridge arm of the first phase bridge arm (10) and the upper and lower bridge arms of the second phase bridge arm (20) to be switched off, so that the energy storage element (30) charges the battery through the first inductor (L1); to control the lower bridge arm (S2) of the first phase bridge arm (10) and the upper bridge arm (S3) of the second phase bridge arm (20) to be switched on and to control the upper bridge arm (S1) of the first phase bridge arm (10) and the lower bridge arm (S4) of the second phase bridge arm (20) to be switched off, so that the energy storage element (30) charges the battery through the second inductor (L2) and the first inductor (L1) charges the battery;and control the lower bridge arm (S4) of the second phase bridge arm (20) to be switched on and control the upper bridge arm (S3) of the second phase bridge arm (20) and the upper bridge arm (S1) and the lower bridge arm (S2) of the first phase bridge arm (10) to be switched off, so that the second inductor (L2) charges the battery.; 16. A method according to any one of claims 12 to 15, characterized in that, at a stage where one of the first inductor (L1) and the second inductor (L2) is in the energy storage state and the other is in the free-spinning state, after a bridge arm configured to perform the free-spinning of the inductor is controlled to operate, a bridge arm configured to perform the energy storage of the inductor is controlled to operate after a delay of a current duration.

17. Method, according to any one of claims 11 to 16, characterized in that a switching frequency or duty cycle of the first phase bridge arm (10) and the second phase bridge arm (20) is adjusted during heating to cause a value of a current flowing through the battery to reach an ideal current value.

18. Method according to claim 17, characterized by adjusting a duty cycle of the first phase bridge arm (10) and the second phase bridge arm (20) during heating to cause a value of current flowing through the battery to reach an optimum current value comprising: adjusting a duty cycle of the first phase bridge arm (10) and the second phase bridge arm (20) in a next carrier frequency period during heating, according to a comparison result of the value of current flowing through the battery and the optimum current value and the duty cycle of the first phase bridge arm (10) and the second phase bridge arm (20) in a current carrier frequency period, to cause the value of current flowing through the battery to reach the optimum current value.

19. Method, according to claim 18, characterized by adjusting the duty cycle of the first phase bridge arm (10) and the second phase bridge arm (20) in a next carrier frequency period during Petition 870260077171, dated 03 / 08 / 2026, pp. 103 / 104 10 / 10 heating, according to a comparison result of the current value flowing through the battery and the optimum current value and the duty cycle of the first phase bridge arm (10) and the second phase bridge arm (20) in a current carrier frequency period, to cause the current value flowing through the battery to reach the optimum current value, comprising: during battery charging or discharging,control the first phase bridge arm (10) and the second phase bridge arm (20) to make the duty cycle of the first phase bridge arm (10) and the second phase bridge arm (20) in the next carrier frequency period greater than the duty cycle in the current carrier frequency period, when the value of the current flowing through the battery is less than the optimum current value; and control the first phase bridge arm (10) and the second phase bridge arm (20) to make the duty cycle of the first phase bridge arm (10) and the second phase bridge arm (20) in the next carrier frequency period less than the duty cycle in the current carrier frequency period, when the value of the current flowing through the battery is greater than the optimum current value, until the value of the current flowing through the battery reaches the optimum current value.

20. Vehicle characterized by comprising a battery and the battery power processing device, as defined in any one of claims 1 to 10. Petition 870260077171, dated 03 / 08 / 2026, page 104 / 104

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